CN1142006C - Process for enriching oxygen in air by two-stage pressure swing adsorption - Google Patents

Process for enriching oxygen in air by two-stage pressure swing adsorption Download PDF

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CN1142006C
CN1142006C CNB021136726A CN02113672A CN1142006C CN 1142006 C CN1142006 C CN 1142006C CN B021136726 A CNB021136726 A CN B021136726A CN 02113672 A CN02113672 A CN 02113672A CN 1142006 C CN1142006 C CN 1142006C
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adsorption
pressure swing
swing adsorption
stage pressure
tower
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CN1386565A (en
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宋宇文
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Chengdu Tianli Chemical Engineering Technology Co Ltd
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Chengdu Tianli Chemical Engineering Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
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Abstract

The present invention relates to a method for producing rich oxygen in air by a two-stage pressure-swing adsorption technique, which has the technical scheme that two-stage pressure-swing adsorption devices are connected in series; each pressure-swing adsorption device is provided with two or more adsorption towers; the first pressure-swing adsorption device is used for eliminating water, carbon dioxide and partial nitrogen in raw air; the second pressure-swing adsorption device is used for further eliminating the nitrogen in the raw air; oxygen in outlet gas of the absorption step in adsorption towers of the first pressure-swing adsorption device and the second pressure-swing adsorption device respectively has average concentration of 21 to 80%(v) and 30 to 95%(v); each adsorption tower of the first pressure-swing adsorption device sequentially has the processing steps of adsorption A, vacuum pumping VC or backward discharging BD, two-stage gas pressure rise 2ER and final pressure rise FR in one cycle period, and each adsorption tower is mutually staggered in the time of the cycle period; each adsorption tower of the second pressure-swing adsorption device sequentially has the processing steps of absorption A, recovery RG and final pressure rise FR in one cycle period, and each adsorption tower is mutually staggered in the cycle period. The present invention can effectively increase the recovery rate of oxygen.

Description

The method that adopts two-stage pressure swing adsorption from air, to produce oxygen enrichment
One, technical field
The present invention relates to the air is the method for raw material production oxygen enrichment, especially adopts two-stage pressure swing adsorption to produce the method for oxygen enrichment from air.
Two, background technology
At present, the method that adopts two-stage pressure swing adsorption to produce oxygen enrichment from air does not also have disclosed patent documentation and document announcement both at home and abroad.Prior art all adopts a cover pressure-swing absorption apparatus to produce oxygen enrichment from air, all adopt a cover pressure-swing absorption apparatus from air, to produce oxygen enrichment as Chinese patent publication number CN1035993A, CN1200949A, CN1252322A etc., the adsorption tower of prior art is before desorb emptying, and its oxygen concentration is higher.For example, when production oxygen concentration during greater than the oxygen rich gas of 93% (V), adsorption tower is before desorb emptying, its exit oxygen concentration is greater than 60% (V), it is short to add pressure swing adsorption oxygen making device circulation time compole, therefore oxygen recovery rate is very low, is no more than 50% (V), makes the power consumption of whole oxygenerator and investment very high.
Three, summary of the invention
Purpose of the present invention just provides a kind of method that adopts two-stage pressure swing adsorption to produce oxygen enrichment from air, and this method can have and will imitate the oxygen recovery rate of the whole device of ground raising.
Technical scheme of the present invention;
The present invention adopts two stage pressure swing adsorption apparatus serial operations, and first stage pressure swing adsorption apparatus is the adsorption tower of two or more parallel operations, is used for removing water, carbonic acid gas and the part nitrogen of raw air; Second stage pressure swing adsorption apparatus is the adsorption tower of two or more parallel operations, is used for airborne nitrogen is further removed; The mean concns of oxygen was that 21-80% (v), is preferably 21-50% and (v), most preferably is 23-45% (v) during the first stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; The mean concns of oxygen was that ((v) % most preferably is 80%-85% (v) to 30-95% v), to be preferably 60-93 during the second stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; Each adsorption tower of above-mentioned first stage pressure swing adsorption apparatus in a loop cycle successively experience absorption A, vacuumize VC or the contrary BD, two sections gas lifts put presses 2ER, the final FR pressure swing adsorption technique step of boosting, and each adsorption tower staggers on the time of loop cycle mutually; Each adsorption tower of second stage pressure swing adsorption apparatus in a loop cycle successively experience absorb A, reclaim RG, the FR pressure swing adsorption technique step of finally boosting, and each adsorption tower staggers on the time of loop cycle mutually.
After the absorption A of first stage pressure swing adsorption apparatus adsorption tower processing step, increase equal pressure drop ED processing step, before the FR processing step that finally boosts of the first stage pressure swing adsorption apparatus adsorption tower, increase equal voltage rise ER processing step.
After the absorption A of second stage pressure swing adsorption apparatus adsorption tower processing step, increase equal pressure drop ED processing step, before the FR processing step that finally boosts of the second stage pressure swing adsorption apparatus adsorption tower, increase equal voltage rise ER processing step.
After the absorption A of first stage pressure swing adsorption apparatus adsorption tower processing step, increase equal pressure drop ED processing step, before the FR processing step that finally boosts of the first stage pressure swing adsorption apparatus adsorption tower, increase equal voltage rise ER processing step; After the absorption A of second stage pressure swing adsorption apparatus adsorption tower processing step, increase equal pressure drop ED processing step, before the FR processing step that finally boosts of the second stage pressure swing adsorption apparatus adsorption tower, increase equal voltage rise ER processing step.
The second stage pressure swing adsorption apparatus adsorption tower reclaims the gas that the RG step emits and is introduced into the intermediate buffering jar, and then the gas in the intermediate buffering jar is sent into first stage pressure swing adsorption apparatus vacuumizes VC or the contrary adsorption tower of putting after BD finishes; Or second the stage pressure swing adsorption apparatus adsorption tower reclaim gas that the RG step emits and directly enter first stage pressure swing adsorption apparatus and vacuumize VC or the contrary adsorption tower of putting after BD finishes.
The pressure of two-stage pressure swing adsorption apparatus adsorption step A is 0.018～0.3MPa (gauge pressure), is preferably 0.018～0.2MPa (gauge pressure), most preferably is 0.15～0.2MPa (gauge pressure), and the adsorptive pressure of two-stage pressure swing adsorption apparatus can equate also can be unequal.The sorbent material that loads from down to up in the first stage pressure swing adsorption apparatus adsorption tower is activated alumina and molecular sieve; The sorbent material of filling only is a molecular sieve in the second stage pressure swing adsorption apparatus adsorption tower.
The adsorption tower quantity of two-stage pressure swing adsorption apparatus can equate also can be unequal.
Prior art all adopts a cover pressure-swing absorption apparatus to produce the product oxygen enrichment from air, before adsorption tower absorption finishes back and desorb emptying, oxygen concentration is higher in the adsorption tower, it is short to add pressure swing adsorption oxygen making device circulation time compole, therefore oxygen recovery rate is very low, makes the power consumption of whole oxygenerator and investment very high.The present invention adopts two-stage pressure swing adsorption to produce oxygen enrichment from air, the oxygen concentration in the first stage pressure swing adsorption apparatus exit is far below the desired product oxygen-rich concentration, adsorption tower is before absorption finishes back and desorb emptying, and oxygen concentration is far below the oxygen concentration of prior art adsorption tower before absorption finishes back and desorb emptying in the adsorption tower; Though the oxygen concentration in the second stage pressure swing adsorption apparatus exit is the same with prior art is the desired product oxygen-rich concentration, and adsorption tower is before absorption finishes back and desorb, oxygen concentration is a little more than the oxygen concentration of prior art adsorption tower before absorption finishes back and desorb in the adsorption tower, but the second stage pressure swing adsorption apparatus adsorption tower is interior without any gas emptying, the depressurization desorption of its sorbent material is to finish by boosting with the first stage pressure swing adsorption apparatus adsorption tower of just finishing desorption procedure, therefore, oxygen loss of the present invention is at first stage pressure swing adsorption apparatus, and the first stage pressure swing adsorption apparatus adsorption tower is before absorption finishes back and desorb emptying, oxygen concentration is far below the oxygen concentration of prior art adsorption tower before absorption finishes back and desorb emptying in the adsorption tower, so, the present invention compared with prior art rate of recovery of oxygen improves greatly, promptly when producing the oxygen enriched product of same quantity, the raw air amount that consumes significantly reduces, thereby has saved power consumption widely and reduced the oxygenerator investment.Power consumption is the highest to be saved more than 45%, the highest saving more than 48% of investment.
Four, description of drawings
Fig. 1 is the process flow sheet of the embodiment of the invention 1,2,3,4 and 5.
Fig. 2 is the processing step working procedure table of the embodiment of the invention 1,2,3,4 and 5 first stage pressure swing adsorption apparatus adsorption towers.
Fig. 3 is the processing step working procedure table of the embodiment of the invention 1,2,3,4 and 5 second stage pressure swing adsorption apparatus adsorption towers.
Fig. 4 is the process flow sheet of the embodiment of the invention 6,7,8,9,10,11,12,13,14 and 15.
Fig. 5 is the processing step working procedure table of the embodiment of the invention 6,7,8,9,10,11,12,13,14 and 15 first stage pressure swing adsorption apparatus adsorption towers.
Fig. 6 is the processing step working procedure table of the embodiment of the invention 6,7,8,9,10,11,12,13,14 and 15 second stage pressure swing adsorption apparatus adsorption towers.
Fig. 7 is the process flow sheet of the embodiment of the invention 16.
Fig. 8 is the processing step working procedure table of the embodiment of the invention 16 first stage pressure swing adsorption apparatus adsorption towers.
Fig. 9 is the processing step working procedure table of the embodiment of the invention 16 second stage pressure swing adsorption apparatus adsorption towers.
Five, embodiment
Unstripped gas of the present invention is an air, its typical table composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
The present invention adopts two-stage pressure swing adsorption to produce oxygen enrichment from air, this method adopts two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus is used to remove vaporous water, carbonic acid gas and part nitrogen, the mean concns of oxygen was 21～80% (V) during the adsorption tower adsorption step was worked off one's feeling vent one's spleen, and the sorbent material that loads from down to up in the adsorption tower is activated alumina and molecular sieve; Second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration, and the sorbent material of filling is a molecular sieve in the adsorption tower.The pressure of two-stage pressure swing adsorption apparatus adsorption step A is 0.003～0.3MPa (gauge pressure), and the adsorptive pressure of two-stage pressure swing adsorption apparatus can be unequal.Each adsorption tower of two-stage pressure swing adsorption apparatus experiences following steps successively in a circulation.
First stage pressure swing adsorption apparatus:
(1) absorption A
Air is sent into the adsorption tower opening for feed that is in adsorption step, sorbent material in the adsorption tower is components such as water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, the components such as argon gas of Xi Fu part nitrogen and difficult absorption do not flow out from exit end and enter the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, As time goes on, the total amount of components such as adsorbent water, carbonic acid gas and part nitrogen constantly increases, when the adsorbents adsorb said components is saturated, stop air inlet, this moment, absorption finished.
(2) equal pressure drop ED
After absorption finishes, in the adsorption tower in the dead space gas oxygen concentration higher, this part oxygen need be recycled, for this reason, the gas in the adsorption tower along the absorption direction from the step-down of adsorption tower exit.Dead space gas is discharged from adsorption tower outlet and is entered this section and finished two sections gas lifts and press the corresponding adsorption tower of steps to boost.
(3) the contrary BD of putting
After absorption or equal pressure drop ED finish,, then that this part gas is reverse from adsorption tower bottom emptying if gaseous tension is higher than normal atmosphere in the adsorption tower; If gaseous tension is lower than normal atmosphere in the adsorption tower, then do not carry out directly entering next step against putting the BD step.
(4) vacuumize VC
Contrary put BD or after all pressure drop ED finishes, from the adsorption tower bottom with vacuum pump with the emptying of releasing of adsorbent water, carbonic acid gas and nitrogen, make sorbent material obtain regeneration.
(5) two sections gas lifts are pressed 2ER
Vacuumize VC or contrary put BD and finish after, utilize the absorption of the second stage pressure swing adsorption apparatus adsorption tower to finish or the gas after all pressure drop ED finishes enters and finishes the adsorption tower that vacuumizes step, adsorption tower is boosted.
(6) boost pressure ER
After two sections gas lifts press 2ER to finish, utilize the equal voltage drop step expellant gas of this section, enter adsorption tower, make the adsorption tower pressure that progressively raises from exit end.
(7) FR that finally boosts
After boost pressure finishes, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and adsorption tower is boosted,, also can utilize raw air that adsorption tower is raised to adsorptive pressure until being raised to adsorptive pressure from the top.
Second stage pressure swing adsorption apparatus
(1) absorption A
The adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step is worked off one's feeling vent one's spleen and is sent into the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, sorbent material in the adsorption tower optionally adsorbs nitrogen, and components such as the oxygen of difficult absorption and argon gas are discharged from exit end and entered oxygen enrichment surge tank or next workshop section.As time goes on, adsorbent nitrogen total amount constantly increases, and when adsorbents adsorb nitrogen is saturated, stops air inlet, and this moment, absorption finished, and oxygen concentration is controlled at the level of product requirement in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
After absorption finished, dead space gas was discharged from the adsorption tower outlet and is entered this section and finished the corresponding adsorption tower that reclaims the RG step and boost in the adsorption tower, and two pressure towers can equate, also can be unequal, meet the demands to guarantee the product oxygen-rich concentration.
(3) reclaim RG
Put into an intermediate buffering jar with gas in the adsorption tower is earlier reverse, and then the gas in the intermediate buffering jar is sent into first stage pressure swing adsorption apparatus vacuumize VC or the contrary adsorption tower of putting after BD finishes; Or second the stage pressure swing adsorption apparatus adsorption tower reclaim gas that the RG step emits and directly enter first stage pressure swing adsorption apparatus and vacuumize VC or the contrary adsorption tower of putting after BD finishes.
(4) boost pressure ER
After reclaiming the RG end, utilize equal voltage drop step expellant gas, enter adsorption tower, make adsorption tower rising pressure from exit end.
(5) FR that finally boosts
The adsorption tower that utilization is in adsorption step is worked off one's feeling vent one's spleen and from the top adsorption tower is boosted, until being raised to adsorptive pressure.
Embodiments of the invention 1:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.018MPa (G)
As shown in Figure 1, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V4 in addition and all presses each one of surge tank V2.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two-stage pressure swing adsorption apparatus serial operation, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.Be example now, the processing step of the present embodiment first stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with the A tower:
(1) absorption A
At this moment, the A tower has been finished the FR step of finally boosting, open sequencing valve 1A, 2A, air enters adsorption tower A through pipeline G11, in the A adsorption tower, sorbent material is the components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air optionally, Xi Fu part nitrogen and be difficult for the oxygen of absorption and components such as argon are discharged through sequencing valve 2A from exit end and entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step.As time goes on, the total amount of components such as adsorbent vaporous water, carbonic acid gas and nitrogen constantly increases, when the adsorbents adsorb said components is saturated, stop air inlet, close sequencing valve 1A, 2A, this moment, absorption finished, and oxygen concentration is controlled at 21～23% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3A, KV10 after finishing, and the gas in the A tower enters through pipeline G13 all presses surge tank V2, when the A tower with after all pressing surge tank V2 pressure in a basic balance, closes sequencing valve 3A, KV10.
(3) vacuumize VC
After all pressure drop ED finishes, open sequencing valve 5A, through pipeline G15, vacuum pump P1 from the A tower bottom the emptying of releasing of components such as the vaporous water in the tower, carbonic acid gas and part nitrogen, make sorbent material obtain regeneration, vacuumize end after, close sequencing valve 5A.
(4) two sections gas lifts are pressed 2ER
After vacuumizing the VC end, open sequencing valve 4A, the gas in the intermediate buffering jar V1 enters the A tower A tower is boosted, and boosts after the end, closes sequencing valve 4A.
(5) equal voltage rise ER
After two sections gas lifts press 2ER to finish, open sequencing valve 3A, KV10, the gas of all pressing surge tank V2 when the A tower with after all pressing surge tank V2 pressure in a basic balance, is closed sequencing valve KV10 in pipeline G13 enters the A tower.
(6) FR that finally boosts
After all voltage rise finishes, open sequencing valve KV6, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when the A pressure tower rises to adsorptive pressure, close sequencing valve KV6,3A from the top to the A tower.
So far, the A tower has been finished a circulation, can enter next circulation again.The B adsorption tower is the same with the circulation step of A tower, just staggers mutually on the time, sees Fig. 8.
Be example now, the processing step of the present embodiment second stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with a tower:
(1) absorption A
At this moment, the a tower has been finished the FR step of finally boosting, open sequencing valve 1a, 2a, first stage pressure swing adsorption apparatus is worked off one's feeling vent one's spleen and is entered adsorption tower a through pipeline G21, in a adsorption tower, sorbent material optionally adsorbs the components such as part nitrogen of first stage pressure swing adsorption apparatus in working off one's feeling vent one's spleen, component such as Xi Fu oxygen and argon and part nitrogen does not flow out through sequencing valve 2a from exit end and enters the oxygen enriched product surge tank, As time goes on, adsorbent nitrogen total amount constantly increases, when adsorbents adsorb nitrogen is saturated, close sequencing valve 1a, 2a, stop air inlet, this moment, absorption finished, and oxygen concn is controlled at about 93% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3a, KV11 after finishing, and the gas in a tower enters through pipeline G23 all presses surge tank V3, when a tower with after all pressing surge tank V3 pressure in a basic balance, closes sequencing valve 3a, KV11.
(3) reclaim RG
After all pressure drop finishes, open sequencing valve 4a,, after a tower and intermediate buffering jar V1 pressure are in a basic balance, close sequencing valve 4a the reverse intermediate buffering jar V1 that puts into of the gas in a tower.
(4) equal voltage rise ER
After reclaiming the RG end, open sequencing valve 3a, KV11, the gas of all pressing surge tank V3 when the A tower with after all pressing surge tank V3 pressure in a basic balance, is closed sequencing valve KV11 in pipeline G23 enters the A tower.
(5) FR that finally boosts
After all voltage rise ER finishes, open sequencing valve KV12, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when a pressure tower rises to adsorptive pressure, close sequencing valve KV12,3a from the top to a tower.
So far, a tower has been finished a circulation, can enter next circulation again.The b adsorption tower is the same with the circulation step of a tower, just staggers mutually on the time, sees Fig. 3.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 45%, whole device hardware investment has reduced about 25%.
Embodiments of the invention 2:
This routine unstripped gas is an air.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 1.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.003MPa (G)
As shown in Figure 1, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V2 in addition and all presses each one of surge tank V3.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V4 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 30%, whole device hardware investment has reduced about 12%.
Embodiments of the invention 3:
This routine unstripped gas is an air.Oxygen concentration was controlled at 75～80% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 1.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.018MPa (G)
As shown in Figure 1, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V2 in addition and all presses each one of surge tank V3.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V4 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 75～80% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 10%, whole device hardware investment has reduced about 1%.
Embodiments of the invention 4:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 60% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 1.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.018MPa (G)
As shown in Figure 1, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V2 in addition and all presses each one of surge tank V3.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V4 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 60% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 60% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 32%, whole device hardware investment has reduced about 13%.
Embodiments of the invention 5:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 30% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 1.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.018MPa (G)
As shown in Figure 1, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V2 in addition and all presses each one of surge tank V3.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V4 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 30% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 30% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 8%, whole device hardware investment will reduce about 5%.
Embodiments of the invention 6:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
Fig. 4 is the process flow sheet of present embodiment.
Fig. 5 is the processing step working procedure table of present embodiment first stage pressure swing adsorption apparatus.
Fig. 6 is the processing step working procedure table of present embodiment second stage pressure swing adsorption apparatus.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.1MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.Be example now, the processing step of the present embodiment first stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with the A tower:
(1) absorption A
At this moment, the A tower has been finished the FR step of finally boosting, open sequencing valve 1A, 2A, air enters adsorption tower A through pipeline G11, in the A adsorption tower, sorbent material is the components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air optionally, Xi Fu part nitrogen and be difficult for the oxygen of absorption and components such as argon are discharged through sequencing valve 2A from exit end and entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step.As time goes on, the total amount of components such as adsorbent vaporous water, carbonic acid gas and nitrogen constantly increases, when the adsorbents adsorb said components is saturated, stop air inlet, close sequencing valve 1A, 2A, this moment, absorption finished, and oxygen concentration is controlled at 21～23% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3A, KV10 after finishing, and the gas in the A tower enters through pipeline G13 all presses surge tank V2, when the A tower with after all pressing surge tank V2 pressure in a basic balance, closes sequencing valve 3A, KV10.
(3) the contrary BD of putting
After all pressure drop ED finishes, open sequencing valve 5A, from the A tower bottom components such as the vaporous water in the tower, carbonic acid gas and part nitrogen are desorbed emptying, make sorbent material obtain regeneration, close sequencing valve 5A then through pipeline G15.
(4) two sections gas lifts are pressed 2ER
After putting the BD end, open sequencing valve 4A, the gas in the intermediate buffering jar V1 enters the A tower A tower is boosted, and boosts after the end, closes sequencing valve 4A.
(5) equal voltage rise ER
After two sections gas lifts press 2ER to finish, open sequencing valve 3A, KV10, the gas of all pressing surge tank V2 when the A tower with after all pressing surge tank V3 pressure in a basic balance, is closed sequencing valve KV10 in pipeline G13 enters the A tower.
(6) FR that finally boosts
After all voltage rise finishes, open sequencing valve KV6, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when the A pressure tower rises to adsorptive pressure, close sequencing valve KV6,3A from the top to the A tower.
So far, the A tower has been finished a circulation, can enter next circulation again.B is the same with the circulation step of A tower with the C adsorption tower, just staggers mutually on the time, sees Fig. 5.
Be example now, the processing step of the present embodiment second stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with a tower:
(1) absorption A
At this moment, the a tower has been finished the FR step of finally boosting, open sequencing valve 1a, 2a, first stage pressure swing adsorption apparatus is worked off one's feeling vent one's spleen and is entered adsorption tower a through pipeline G21, in a adsorption tower, sorbent material optionally adsorbs the components such as part nitrogen of first stage pressure swing adsorption apparatus in working off one's feeling vent one's spleen, component such as Xi Fu oxygen and argon and part nitrogen does not flow out through sequencing valve 2a from exit end and enters the oxygen enriched product surge tank, As time goes on, adsorbent nitrogen total amount constantly increases, when adsorbents adsorb nitrogen is saturated, close sequencing valve 1a, 2a, stop air inlet, this moment, absorption finished, and oxygen concn is controlled at about 93% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3a, KV11 after finishing, and the gas in a tower enters through pipeline G23 all presses surge tank V3, when a tower with after all pressing surge tank V3 pressure in a basic balance, closes sequencing valve 3a, KV11.
(3) reclaim RG
After all pressure drop finishes, open sequencing valve 4a,, after a tower and intermediate buffering jar V1 pressure are in a basic balance, close sequencing valve 4a the reverse intermediate buffering jar V1 that puts into of the gas in a tower.
(4) equal voltage rise ER
After reclaiming the RG end, open sequencing valve 3a, KV11, the gas of all pressing surge tank V4 when the A tower with after all pressing surge tank V4 pressure in a basic balance, is closed sequencing valve KV11 in pipeline G23 enters the A tower.
(5) FR that finally boosts
After all voltage rise ER finishes, open sequencing valve KV12, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when a pressure tower rises to adsorptive pressure, close sequencing valve KV12,3a from the top to a tower.
So far, a tower has been finished a circulation, can enter next circulation again.B is the same with the circulation step of a tower with the c adsorption tower, just staggers mutually on the time, sees Fig. 6.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 38%, whole device hardware investment has reduced about 31%.
Embodiments of the invention 7:
This routine unstripped gas is an air.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.1MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, with receiving RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 23%, whole device hardware investment has reduced about 18%.
Embodiments of the invention 8:
This routine unstripped gas is an air.Oxygen concentration was controlled at 75～80% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.1MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 75～80% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 12%, whole device hardware investment has reduced about 13%.
Embodiments of the invention 9:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 60% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.1MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 60% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 60% (V).For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 18%, whole device hardware investment has reduced about 24%.
Embodiments of the invention 10:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 30% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.1MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 30% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 30% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 7%, whole device hardware investment has reduced about 12%.
Embodiments of the invention 11:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at 80% (V) above (being the product oxygen enrichment) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.15MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at more than 80% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to more than 80% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 30%, whole device hardware investment has reduced about 38%.
Embodiments of the invention 12:
This routine unstripped gas is an air.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at 80% (V) above (being the product oxygen enrichment) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.15MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at more than 80% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to more than 80% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 18%, whole device hardware investment has reduced about 23%.
Embodiments of the invention 13:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at 85% (V) above (being the product oxygen enrichment) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.2MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at more than 85% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to more than 85% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 21%, whole device hardware investment has reduced about 42%.
Embodiments of the invention 14:
This routine unstripped gas is an air.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at 85% (V) above (being the product oxygen enrichment) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.2MPa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 45～50% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at more than 85% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to more than 85% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 12%, whole device hardware investment has reduced about 25%.
Embodiments of the invention 15:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
The processing step working procedure table of the processing step working procedure table of the process flow sheet of present embodiment, first stage pressure swing adsorption apparatus and second stage pressure swing adsorption apparatus is identical with embodiment 6.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.3Pa (G)
As shown in Figure 4, adsorption tower A～C is totally 3 composition first stage pressure swing adsorption apparatus, all presses one of surge tank V2 in addition in addition.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program; Adsorption tower a～c is totally 3 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt the adsorption tower more than three to make up, and all press surge tank V2 and V3 to take down.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, the contrary BD, two sections gas lifts put press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.
The present embodiment result be the product oxygen-rich concentration more than or equal to 93% (V) about.
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 2%, whole device hardware investment has reduced about 48%.
Embodiments of the invention 16:
This routine unstripped gas is an air.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, and oxygen concentration was controlled at (being the product oxygen enrichment) about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen.
Fig. 7 is the process flow sheet of present embodiment.
Fig. 8 is the processing step working procedure table of present embodiment first stage pressure swing adsorption apparatus.
Fig. 9 is the processing step working procedure table of present embodiment second stage pressure swing adsorption apparatus.
The air of present embodiment is composed as follows:
Component O 2 N 2 Ar CO 2 Other ∑
Concentration (%) (V) 20.93 78.03 0.932 0.03 0.078 100
Temperature :≤45 ℃
Pressure: 0.018MPa (G)
As shown in Figure 7, adsorption tower A～B is totally 2 composition first stage pressure swing adsorption apparatus, also has vacuum buffer tank V4 in addition and all presses each one of surge tank V2.The sorbent material that loads from down to up in the adsorption tower is followed successively by activated alumina and molecular sieve, moves single tower absorption and once all presses program, utilizes vacuum pipeline G15 that adsorption tower is vacuumized by vacuum pump P1; Adsorption tower a～b is totally 2 composition second stage pressure swing adsorption apparatus, all presses one of surge tank V3 in addition in addition.The sorbent material of filling is a molecular sieve in the adsorption tower, moves single tower absorption and once all presses program.Present embodiment is with above-mentioned two stage pressure swing adsorption apparatus serial operations, first stage pressure swing adsorption apparatus removes airborne vaporous water, carbonic acid gas and part nitrogen, second stage pressure swing adsorption apparatus is used for the nitrogen of the effusive middle gas of the first stage pressure swing adsorption apparatus adsorption tower adsorption step is further removed, and oxygen is increased to required concentration.First section and second stage pressure swing adsorption apparatus also can adopt a plurality of adsorption towers to make up, to take down vacuum buffer tank V4 and all to press surge tank V2, V3.
Air admission first stage pressure swing adsorption apparatus is in the adsorption tower of adsorption step, sorbent material in the adsorption tower is components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air successively optionally, components such as the oxygen of Xi Fu part nitrogen and difficult absorption and argon are not discharged from exit end and are entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step, molecular sieve in the adsorption tower property selected ground absorption nitrogen, components such as the oxygen of difficult absorption and argon are discharged from exit end and are entered product oxygen enrichment surge tank.Oxygen concentration was controlled at 21～23% (V) during the adsorption tower that first stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC, two sections gas lifts and press 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting; Oxygen concentration was controlled at about 93% (V) during the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step was worked off one's feeling vent one's spleen, its adsorption tower in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting.Be example now, the processing step of the present embodiment first stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with the A tower:
(1) absorption A
At this moment, the A tower has been finished the FR step of finally boosting, open sequencing valve 1A, 2A, air enters adsorption tower A through pipeline 611, in the A adsorption tower, sorbent material is the components such as vaporous water, carbonic acid gas and part nitrogen in the absorbed air optionally, Xi Fu part nitrogen and be difficult for the oxygen of absorption and components such as argon are discharged through sequencing valve 2A from exit end and entered the adsorption tower that second stage pressure swing adsorption apparatus is in adsorption step.As time goes on, the total amount of components such as adsorbent vaporous water, carbonic acid gas and nitrogen constantly increases, when the adsorbents adsorb said components is saturated, stop air inlet, close sequencing valve 1A, 2A, this moment, absorption finished, and oxygen concentration is controlled at 21～23% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3A, KV10 after finishing, and the gas in the A tower enters through pipeline G13 all presses surge tank V2, when the A tower with after all pressing surge tank V2 pressure in a basic balance, closes sequencing valve 3A, KV10.
(3) vacuumize VC
After all pressure drop ED finishes, open sequencing valve 5A, through pipeline G15, vacuum pump P1 from the A tower bottom the emptying of releasing of components such as the vaporous water in the tower, carbonic acid gas and part nitrogen, make sorbent material obtain regeneration, vacuumize end after, close sequencing valve 5A.
(4) two sections gas lifts are pressed 2ER
After vacuumizing the VC end, open sequencing valve 4A, the gas in the intermediate buffering jar V1 enters the A tower A tower is boosted, and boosts after the end, closes sequencing valve 4A.
(5) equal voltage rise ER
After two sections gas lifts press 2ER to finish, open sequencing valve 3A, KV10, the gas of all pressing surge tank V2 when the A tower with after all pressing surge tank V2 pressure in a basic balance, is closed sequencing valve KV10 in pipeline G13 enters the A tower.
(6) FR that finally boosts
After all voltage rise finishes, open sequencing valve KV6, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when the A pressure tower rises to adsorptive pressure, close sequencing valve KV6,3A from the top to the A tower.
So far, the A tower has been finished a circulation, can enter next circulation again.The B adsorption tower is the same with the circulation step of A tower, just staggers mutually on the time, sees Fig. 8.
Be example now, the processing step of the present embodiment second stage pressure swing adsorption apparatus adsorption tower in a working cycle be described with a tower:
(1) absorption A
At this moment, the a tower has been finished the FR step of finally boosting, open sequencing valve 1a, 2a, first stage pressure swing adsorption apparatus is worked off one's feeling vent one's spleen and is entered adsorption tower a through pipeline G21, in a adsorption tower, sorbent material optionally adsorbs the components such as part nitrogen of first stage pressure swing adsorption apparatus in working off one's feeling vent one's spleen, component such as Xi Fu oxygen and argon and part nitrogen does not flow out through sequencing valve 2a from exit end and enters the oxygen enriched product surge tank, As time goes on, adsorbent nitrogen total amount constantly increases, when adsorbents adsorb nitrogen is saturated, close sequencing valve 1a, 2a, stop air inlet, this moment, absorption finished, and oxygen concn is controlled at about 93% (V) in working off one's feeling vent one's spleen.
(2) equal pressure drop ED
Absorption is opened sequencing valve 3a, KV11 after finishing, and the gas in a tower enters through pipeline G23 all presses surge tank V3, when a tower with after all pressing surge tank V3 pressure in a basic balance, closes sequencing valve 3a, KV11.
(3) reclaim RG
After all pressure drop finishes, open sequencing valve 4a,, after a tower and intermediate buffering jar V1 pressure are in a basic balance, close sequencing valve 4a the reverse intermediate buffering jar V1 that puts into of the gas in a tower.
(4) equal voltage rise ER
After reclaiming the RG end, open sequencing valve 3a, KV11, the gas of all pressing surge tank V3 when the A tower with after all pressing surge tank V3 pressure in a basic balance, is closed sequencing valve KV11 in pipeline G23 enters the A tower.
(5) FR that finally boosts
After all voltage rise ER finishes, open sequencing valve KV12, utilize the adsorption tower that is in adsorption step to work off one's feeling vent one's spleen and boost, when a pressure tower rises to adsorptive pressure, close sequencing valve KV12,3a from the top to a tower.
So far, a tower has been finished a circulation, can enter next circulation again.The b adsorption tower is the same with the circulation step of a tower, just staggers mutually on the time, sees Fig. 9.
The present embodiment result is that the product oxygen-rich concentration is more than or equal to 93% (V).
For present embodiment, adopt processing method of the present invention to compare with existing all technology, under air composition and temperature, sorption cycle time, sorbent material and instrument quality, power-equipment performance, controlled function, special-purpose sequencing valve and the hydraulic system structure situation identical with life-span etc., amount to every standard cubic meter pure oxygen power consumption and reduced by 45%, whole device hardware investment has reduced about 25%.

Claims (6)

1, the method that adopts two-stage pressure swing adsorption to produce oxygen enrichment from air is characterized in that, it adopts the two-stage pressure swing adsorption apparatus serial operation; First stage pressure swing adsorption apparatus is the adsorption tower of two or more parallel operations, is used for removing water, carbonic acid gas and the part nitrogen of raw air; Second stage pressure swing adsorption apparatus is the adsorption tower of two or more parallel operations, is used for airborne nitrogen is further removed; The mean concns of oxygen was 21-80v% during the first stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; The mean concns of oxygen was 30-95v% during the second stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; Each adsorption tower of above-mentioned first stage pressure swing adsorption apparatus in a loop cycle successively experience absorption A, all pressure drop ED, vacuumize VC or the contrary BD, two sections gas lifts put presses 2ER, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting, and each adsorption tower staggers on the time of loop cycle mutually; Each adsorption tower of second stage pressure swing adsorption apparatus in a loop cycle successively experience absorption A, all pressure drop ED, reclaim RG, all voltage rise ER, the final FR pressure swing adsorption technique step of boosting, and each adsorption tower staggers on the time of loop cycle mutually.
2, method of from air, producing oxygen enrichment according to claim 1, it is characterized in that, the second stage pressure swing adsorption apparatus adsorption tower reclaims the gas that the RG step emits and is introduced into the intermediate buffering jar, and then the gas in the intermediate buffering jar is sent into first stage pressure swing adsorption apparatus vacuumizes VC or the contrary adsorption tower of putting after BD finishes; Or second the stage pressure swing adsorption apparatus adsorption tower reclaim gas that the RG step emits and directly enter first stage pressure swing adsorption apparatus and vacuumize VC or the contrary adsorption tower of putting after BD finishes.
3, method of producing oxygen enrichment from air according to claim 1 is characterized in that the pressure of two-stage pressure swing adsorption apparatus adsorption step A is gauge pressure 0.003～0.3MPa, and the adsorptive pressure of two-stage pressure swing adsorption apparatus can equate also can be unequal; The sorbent material that loads from down to up in the first stage pressure swing adsorption apparatus adsorption tower is activated alumina and molecular sieve; The sorbent material of filling only is a molecular sieve in the second stage pressure swing adsorption apparatus adsorption tower.
4, method of from air, producing oxygen enrichment according to claim 3, it is characterized in that, the mean concns of oxygen was 21-50v% during the described first stage pressure swing adsorption apparatus absorption tower adsorption step was worked off one's feeling vent one's spleen, and the mean concns of oxygen was 60-93v% during the second stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; The pressure of two-stage pressure swing adsorption apparatus adsorption step A is gauge pressure 0.018-0.2Mpa; The adsorptive pressure of two-stage pressure swing adsorption apparatus can equate also can be unequal.
5, method of producing oxygen enrichment from air according to claim 4 is characterized in that the pressure of described two-stage pressure swing adsorption apparatus adsorption step A is gauge pressure 0.15-0.2Mpa; The mean concns of oxygen was 23-45v% during the described first stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen; The mean concns of oxygen was 80-85v% during the second stage pressure swing adsorption apparatus adsorption tower adsorption step was worked off one's feeling vent one's spleen.
6, method of producing oxygen enrichment from air according to claim 5 is characterized in that the adsorption tower quantity of two-stage pressure swing adsorption apparatus can equate also can be unequal.
CNB021136726A 2002-04-29 2002-04-29 Process for enriching oxygen in air by two-stage pressure swing adsorption Expired - Fee Related CN1142006C (en)

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CN1325143C (en) * 2003-08-18 2007-07-11 西南化工研究设计院 Pressure swing adsorption process for adsorbing separated multiple component from multicomponent mixed gas
CN1287886C (en) * 2004-06-11 2006-12-06 成都天立化工科技有限公司 Improved two-stage pressure-varying adsorption method for preparing high-purity oxygen
CN1250322C (en) * 2004-06-11 2006-04-12 成都天立化工科技有限公司 Method for producing oxygen by three-stage pressure swing adsorption apparatus
CN1302983C (en) * 2005-04-30 2007-03-07 印全彬 Pressure swing adsorption continuous oxygen generation method
CN105126538A (en) * 2015-09-10 2015-12-09 北京氢璞创能科技有限公司 Efficient multi-tank intake type pressure swing adsorption purifier
CN107243225B (en) * 2017-07-25 2023-07-25 杨炯良 Vacuum pressure swing adsorption oxygen generation system with pressure equalizing tank and oxygen generation method thereof
EP4137451A4 (en) * 2020-04-14 2024-01-17 Chengdu Yingchen Tech Co Ltd Method of movable pressure swing adsorption oxygen production device
WO2021207906A1 (en) * 2020-04-14 2021-10-21 成都盈辰科技有限公司 Method for mobile pressure swing adsorption oxygen production device
CN115028143B (en) * 2021-03-07 2024-02-06 上海技典工业产品设计有限公司 Pressure swing adsorption process and method capable of purifying oxygen-enriched air with low oxygen concentration

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