CN108176389B - SF6Method for on-line regeneration of adsorbent in purification treatment apparatus - Google Patents
SF6Method for on-line regeneration of adsorbent in purification treatment apparatus Download PDFInfo
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- CN108176389B CN108176389B CN201810044592.5A CN201810044592A CN108176389B CN 108176389 B CN108176389 B CN 108176389B CN 201810044592 A CN201810044592 A CN 201810044592A CN 108176389 B CN108176389 B CN 108176389B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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Abstract
SF (sulfur hexafluoride)6An on-line regeneration method of an adsorbent of a purification treatment device, comprising the steps of: intercepting nitrogen gas inlet pipeline and SF6The air inlet pipeline comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline and a seventh pipeline; butting pipelines, heating units and adsorption towers according to requirements; installing a valve, a pressure reducing valve, a filter and a vacuum pump on the corresponding pipeline; normal purification treatment is carried out, and the gas is discharged to the outside through a tail gas outlet of the lye tank; when the adsorption capacity of the adsorbent is reduced or the treatment capacity is lost, the adsorbent in the adsorption tower is uniformly heated and heated in a circulating mode after the inert nitrogen is heated, then the adsorption tower is vacuumized, online pressure reduction and heating regeneration is realized, the uniform temperature distribution in the cavity of the adsorption tower is ensured, a heating pipe is completely isolated from the adsorbent, the potential safety risks that workers careless operation is performed, a temperature control system cannot protect the device in time and the like are avoided, the problem that the air tightness of the device is influenced by loading and unloading is thoroughly solved, the regeneration period of the adsorbent is greatly prolonged, and the adsorbent is recycled.
Description
Technical Field
The invention relates to SF6Purification treatment device, in particular to SF6An on-line regeneration method of adsorbent of a purification treatment device.
Background
Along with the increase of the emission intensity of greenhouse gas controlled by the state and the SF control by the power grid enterprises6Attention paid to the recycling of (sulfur hexafluoride) gases, SF6The demand for purification treatment apparatuses is rapidly increasing. The device has an adsorption tower in SF6The purification treatment process plays a role in adsorbing impurities, but the adsorbent in the inner cavity of the purification treatment process can be saturated after long-term purification treatment, so that the adsorption capacity is reduced, and even the treatment capacity is lost.
The recycling of the adsorbent can be realized through regeneration, and the treatment cost is reduced. The pressure reduction or the heating are both beneficial to the desorption of adsorbate or the regeneration of the adsorbent, and the following two regeneration methods are commonly used at present:
firstly, the adsorbent is taken out, put into a vacuum drying oven, vacuumized and heated, and adsorbed impurities are separated out. However, this method has a large load and unload work, and is liable to affect the airtightness of the purification treatment apparatus, and the regeneration period is long.
② the heating pipe is directly inserted into the adsorption tower to heat and vacuumize the adsorbent, which can solve the problem of affecting the air tightness of the purification treatment device due to loading and unloading and shorten the regeneration period to a certain extentOther pressure vessels and pressurized pipelines are also arranged in the device, so that the heating pipe and the adsorbent are easily damaged during operation, even SF6The gas is decomposed by the electric arc to generate a large amount of toxic and harmful gas, and certain safety risk exists.
Disclosure of Invention
The invention aims to provide SF6The method for regenerating the adsorbent of the purification treatment device on line not only can ensure the air tightness of the purification treatment device and shorten the regeneration period of the adsorbent, but also can avoid the damage of a heating pipe and the adsorbent, ensure the uniform distribution of the temperature in a cavity of an adsorption tower, ensure the use safety and realize the recycling of the adsorbent.
The technical solution of the invention is to provide an SF6The online regeneration method of the adsorbent of the purification treatment device comprises the following steps:
(1) intercepting nitrogen gas inlet pipeline and SF6The pipeline comprises an air inlet pipeline, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline and a seventh pipeline;
(2) introducing nitrogen into the pipeline and SF6The outlet of the air inlet pipeline is simultaneously communicated with the inlet of the first pipeline, the outlet of the first pipeline is communicated with the inlet of the heating unit, the outlet of the heating unit is communicated with the inlet of the third pipeline, the outlets of the third pipeline and the second pipeline are simultaneously communicated with the inlet of the adsorption tower, the outlet of the adsorption tower is communicated with the inlet of the fourth pipeline, and the outlet of the fourth pipeline is simultaneously communicated with the inlets of the fifth pipeline, the sixth pipeline and the seventh pipeline;
(3) the nitrogen inlet pipe is provided with a manual valve S1, SF6A manual valve S10 is installed on an air inlet pipeline, a pressure reducing valve and a manual valve S2 are installed at the front part and the rear part of a first pipeline respectively, the inlet of a second pipeline is positioned between the pressure reducing valve and the manual valve S2 and communicated with the first pipeline, a manual valve S3 is installed on the second pipeline, a manual valve S4 is installed on a third pipeline, a manual valve S7, a filter and a manual valve S8 are installed on a fifth pipeline, a manual valve S9 and a vacuum pump are installed on a sixth pipeline, a manual valve S5 and a two-position three-way valve S6 are installed on a seventh pipeline, and a manual valve S5 is positioned at the inlet end;
(4) the outlet of the sixth pipeline is communicated with the outlet of the seventh pipeline, the inlet of the lye tank is communicated with the gas outlet of a two-position three-way valve S6, and the tail gas outlet of the lye tank is communicated with the outside;
(5) performing normal purification treatment
The manual valves S1, S2, S4, S9, S5 and the two-position three-way valve S6 are closed, and SF is mixed with6SF is accessed to an outlet of a buffer tank of a processing unit of the purification processing device6Inlet of the inlet pipe and outlet of the fifth pipe into the SF6The inlet of the power unit of the purification treatment device is adjusted with the pressure reducing valve to enable SF6The gas pressure is reduced to 0.6MPa, and under the action of the pressure, SF6Gas enters the adsorption tower through a manual valve S10, a pressure reducing valve and a manual valve S3 in sequence, is subjected to pressure swing adsorption by the adsorption tower, then enters the power unit through an outlet of the adsorption tower, the manual valve S7, a filter and the manual valve S8 in sequence, and finally is pumped to the deep cooling unit by a compressor of the power unit for purification treatment;
(6) when the adsorption capacity of the adsorbent in the adsorption tower is reduced or the treatment capacity is lost, firstly, closing manual valves S10, S3, S7, S8 and S9, opening manual valves S1, S2, S4, S5 and S6, then connecting a nitrogen steel cylinder with the purity of 99.999% into a nitrogen gas inlet pipeline, opening a steel cylinder valve, adjusting a pressure reducing valve to reduce the gas pressure of the nitrogen to 1MPa, allowing the nitrogen to sequentially pass through the manual valves S1, the pressure reducing valve and the manual valve S2 to enter a heating unit under the action of pressure, performing heat exchange, allowing the nitrogen with the temperature of 200 ℃ to flow out of an outlet of the heating unit, enter the adsorption tower through the manual valve S4, and then enter an alkali liquor in a tank through the manual valve S5 and a two-position three-way valve S6 for neutralization treatment, and finally discharging the alkali tail gas liquid tank to the outside;
(7) when the average temperature of all parts in the inner cavity of the adsorption tower reaches 180 ℃, closing the heating unit to reduce the pressure of the inner cavity of the adsorption tower to atmospheric pressure, and then closing the manual valves S1, S2, S4 and S5 in sequence;
(8) switching a two-position three-way valve S6 to enable the outlet of the vacuum pump to be communicated with the inlet of the lye tank, opening a manual valve S9 and a vacuum pump to vacuumize the adsorption tower, closing the manual valve S9 and the vacuum pump when the pressure reaches 50Pa, opening a manual valve S5 and switching a two-position three-way valve S6 to enable the outlet of the adsorption tower to be communicated with the inlet of the lye tank;
(9) the adsorption tower is cooled by introducing nitrogen into the adsorption tower, and can be used after reaching normal temperature.
SF according to the invention6The adsorbent on-line regeneration method of the purification treatment device comprises two groups of heating units, wherein the two groups of heating units are arranged in parallel one above the other, each group of heating units comprises a heat-preservation container, a heating pipe and a plurality of partition plates which are arranged in the inner cavity of the heat-preservation container in an axially staggered manner, the heating pipes extend into the inner cavity of the heat-preservation container and are arranged at the head of the heat-preservation container through flanges, the tails of the two heat-preservation containers are communicated in series through the flanges, a thermocouple is arranged at the tail of each heat-preservation container, a safety valve is arranged in the middle of the heat-preservation container at the upper part, a second platinum resistor is arranged at the position, close to the head, of the heat-preservation container at the.
SF according to the invention6The method for regenerating the adsorbent of the purification treatment device on line comprises the steps that three first platinum resistors are sequentially arranged on the side wall of the adsorption tower from top to bottom, and the three first platinum resistors are electrically connected with a controller.
SF according to the invention6The online regeneration method of the adsorbent of the purification treatment device is characterized in that a heat exchange fan is arranged on the sixth pipeline, and the heat exchange fan is positioned between the manual valve S9 and the vacuum pump.
SF according to the invention6The online regeneration method of the adsorbent of the purification treatment device is characterized in that an aeration electromagnetic valve V1 is installed on the sixth pipeline, and an aeration electromagnetic valve V1 is located between the heat exchange fan and the vacuum pump.
SF according to the invention6The online regeneration method of the adsorbent of the purification treatment device comprises the steps that a flowmeter L1 and a first pressure gauge P1 are installed on a third pipeline, a second pressure gauge P2 is installed on a fourth pipeline, a vacuum gauge Z1 is installed on a sixth pipeline, and the vacuum gauge Z1 is located between a heat exchange fan and an inflation solenoid valve V1.
After the structure is adopted, compared with the prior art,SF according to the invention6The online regeneration method of the adsorbent of the purification treatment device has the following advantages: different from the prior art, the invention can immediately convert the adsorption capacity of the adsorbent into the online regeneration operation of the adsorbent when the adsorption capacity of the adsorbent is reduced or the treatment capacity is lost, thereby saving a large amount of loading and unloading work of the original adsorbent, ensuring the air tightness of a purification treatment device and greatly shortening the regeneration period of the adsorbent; the heating pipe in the heating unit is separated from the adsorbent, and the heating pipe and the adsorbent are not in direct contact, so that the heating pipe and the adsorbent are prevented from being damaged; the uniform temperature distribution in the cavity of the adsorption tower can be ensured through the flowing of the nitrogen, the use safety is ensured, and the cyclic recycle of the adsorbent is realized.
Drawings
FIG. 1 shows the use of SF according to the invention6The structure schematic diagram of the purification treatment device when the pipelines are connected together by the adsorbent online regeneration method;
FIG. 2 is a schematic view of a cross-sectional enlarged structure of the heating unit of FIG. 1;
fig. 3 is a schematic view of a cross-sectional enlarged structure of the adsorption column of fig. 1.
Detailed Description
SF according to the invention is described in the following with reference to the figures and the detailed description6The method for regenerating the adsorbent of the purification treatment apparatus on line is further described in detail:
as shown in FIGS. 1 to 3, in the present embodiment, the SF according to the present invention6The online regeneration method of the adsorbent of the purification treatment device comprises the following steps:
(1) intercepting nitrogen gas inlet pipeline 10 and SF6An air intake duct 11, a first duct 13, a second duct 14, a third duct 15, a fourth duct 16, a fifth duct 17, a sixth duct 18, and a seventh duct 19;
(2) nitrogen is introduced into the pipeline 10 and the SF6The outlet of the air inlet pipeline 11 is simultaneously communicated with the inlet of the first pipeline 13, the outlet of the first pipeline 13 is communicated with the inlet of the heating unit 25, the outlet of the heating unit 25 is communicated with the inlet of the third pipeline 15, the outlets of the third pipeline 15 and the second pipeline 14 are simultaneously communicated with the inlet of the adsorption tower 24, and the outlet of the adsorption tower 24 is simultaneously communicated with the fourth pipeline16, and the outlet of the fourth pipeline 16 is simultaneously communicated with the inlets of a fifth pipeline 17, a sixth pipeline 18 and a seventh pipeline 19;
(3) a manual valve S1, SF is installed on the nitrogen inlet pipe 106A manual valve S10 is installed on the air inlet pipeline 11, a pressure reducing valve 12 and a manual valve S2 are installed at the front part and the rear part of the first pipeline 13 respectively, the inlet of the second pipeline 14 is positioned between the pressure reducing valve 12 and the manual valve S2 and communicated with the first pipeline 13, a manual valve S3 is installed on the second pipeline 14, a manual valve S4 is installed on the third pipeline 15, a manual valve S7, a filter 22 and a manual valve S8 are installed on the fifth pipeline 17, a manual valve S9 and a vacuum pump 21 are installed on the sixth pipeline 18, a manual valve S5 and a two-position three-way valve S6 are installed on the seventh pipeline 19, and the manual valve S5 is positioned at the inlet end;
(4) the outlet of the sixth pipeline 18 is communicated with the outlet of the seventh pipeline 19, the inlet of the lye tank 20 is communicated with the gas outlet of the two-position three-way valve S6, and the tail gas outlet of the lye tank 20 is communicated with the outside;
(5) performing normal purification treatment
The manual valves S1, S2, S4, S9, S5 and the two-position three-way valve S6 are closed, and SF is mixed with6SF is accessed to an outlet of a buffer tank of a processing unit of the purification processing device6The inlet of the air inlet duct 11 and the outlet of the fifth duct 17 is inserted into the SF6The inlet of the power unit of the purification treatment device is adjusted by the pressure reducing valve 12 to SF6The gas pressure is reduced to 0.6MPa, and under the action of the pressure, SF6Gas enters the adsorption tower 24 through a manual valve S10, a pressure reducing valve 12 and a manual valve S3 in sequence, is subjected to pressure swing adsorption by the adsorption tower, then enters the power unit through an outlet of the adsorption tower, the manual valve S7, the filter 22 and the manual valve S8 in sequence, and finally is pumped to the cryogenic unit by a compressor of the power unit for purification treatment;
(6) when the adsorption capacity of the adsorbent in the adsorption tower 24 is reduced or the treatment capacity is lost, firstly, closing the manual valves S10, S3, S7, S8 and S9, opening the manual valves S1, S2, S4, S5 and S6, then connecting a nitrogen steel cylinder with the purity of 99.999% into the nitrogen gas inlet pipeline 10, opening a steel cylinder valve, adjusting the pressure reducing valve 12 to reduce the gas pressure of the nitrogen gas to 1MPa, allowing the nitrogen gas to sequentially pass through the manual valve S1, the pressure reducing valve 12 and the manual valve S2 to enter the heating unit 25 under the pressure effect, performing heat exchange, allowing the nitrogen gas with the temperature of 200 ℃ to flow out from the outlet of the heating unit 25, passing through the manual valve S4 to enter the adsorption tower 24, then passing through the manual valve S5 and the two-position S6 to enter the lye tank 20 for neutralization treatment, and finally discharging tail gas from the lye tank 20 to the outside;
(7) when the average temperature of each part in the inner cavity of the adsorption tower 24 reaches 180 ℃, the heating unit is closed, the pressure in the inner cavity of the adsorption tower is reduced to the atmospheric pressure, and then the manual valves S1, S2, S4 and S5 are closed in sequence;
(8) switching a two-position three-way valve S6 to enable the outlet of the vacuum pump 21 to be communicated with the inlet of the lye tank 20, opening a manual valve S9 and the vacuum pump 21 to vacuumize the adsorption tower 24, closing the manual valve S9 and the vacuum pump 21 when the pressure reaches 50Pa, opening a manual valve S5 and switching a two-position three-way valve S6 to enable the outlet of the adsorption tower 24 to be communicated with the inlet of the lye tank 20;
(9) the nitrogen is introduced into the adsorption tower 24 to cool the adsorption tower, and the adsorption tower can be used after reaching the normal temperature.
The heating unit 25 is used for heating inert nitrogen gas, and after the inert nitrogen gas meets the process requirements, the adsorbent in the adsorption tower 24 is uniformly heated to raise the temperature so as to release the adsorbate. The lye tank 20 is used for neutralizing impurities desorbed by the adsorbent in the cavity of the adsorption tower, and realizes zero pollution and zero emission in the regeneration process.
For better heating of the nitrogen gas, the heating units 25 are arranged in two groups, the two groups of heating units 25 being arranged in parallel one above the other. Each group of heating units 25 comprises a heat-preserving container 251, a heating pipe 253 and a plurality of partition plates 252 which are arranged in the inner cavity of the heat-preserving container 251 in an axially staggered manner. The partition plate 252 enables nitrogen to flow through the inner cavity of the heat-insulating container 251 in a wave shape, and the heat exchange efficiency is improved. The heating pipe 253 extends into the inner cavity of the heat-insulating container 251 and is arranged at the head of the heat-insulating container 251 through a flange, and when the inner cavity of the heat-insulating container 251 is cleaned, the heating pipe 253 is convenient to detach, so that the maintenance and the replacement of the heating pipe 253 are facilitated; the tail parts of the two heat-insulation containers 251 are communicated in series through a flange, a thermocouple 26 is installed at the tail part of each heat-insulation container 251, the two thermocouples 26 are used for acquiring temperature signals in the cavity of the heat-insulation container 251 and performing overtemperature alarm, and the power supply of the heating pipe 253 is immediately cut off when the temperature is abnormal, so that the service life of the heating pipe 253 is effectively prolonged; a safety valve 28 is arranged in the middle of the upper heat-preservation container, a second platinum resistor 27 is arranged at the position, close to the head, of the lower heat-preservation container, and a support 254 is arranged at the bottom of the lower heat-preservation container 251 and is convenient to support; the heating tube 253, the thermocouple 26 and the second platinum resistor 27 are all electrically connected to the controller. The second platinum resistor 27 is used for collecting temperature signals in the heat preservation container 251 in real time and transmitting the temperature signals to the controller, so that the output power of the heating pipe 253 can be automatically adjusted conveniently, and the temperature of the flowing nitrogen can uniformly reach a set value of 200 ℃.
The sixth pipeline 18 is provided with a heat exchange fan 23, the heat exchange fan 23 is located between the manual valve S9 and the vacuum pump 21, and the heat exchange fan 23 is used for cooling the high-temperature nitrogen gas to protect the vacuum pump 21. The sixth pipeline 18 is also provided with an inflation solenoid valve V1, and the inflation solenoid valve V1 is positioned between the heat exchange fan 23 and the vacuum pump 21. The function of the charging electromagnetic valve V1 is: when the vacuum adsorption tower works (namely an electric state is obtained), a valve rod in the valve moves to block (seal) the inflation inlet, and meanwhile, the vacuum pump 21 is communicated with the adsorption tower 24 to pump out the gas in the inner cavity of the adsorption tower; when the vacuum pump is not in work (namely in a power-off state), the valve rod is restored to the original position under the action of the spring to separate the vacuum pump 21 from the inner cavity of the adsorption tower 24, and outside atmosphere enters the vacuum pump 21 through the inflation inlet of the inflation electromagnetic valve V1, so that the pressure in the pump is balanced, and the oil return from the vacuum pump 21 to the adsorption tower 24 is prevented.
Three first platinum resistors 29 are sequentially arranged on the side wall of the adsorption tower 24 from top to bottom, and all the three first platinum resistors 29 are electrically connected with the controller. The first platinum resistor 29 is used for acquiring temperature signals of the upper position, the middle position and the lower position in the cavity of the adsorption tower 24 in real time and transmitting the temperature signals to the controller, so that the uniform heating condition of the adsorbent can be conveniently judged, and the heating unit 25 is closed when the average value reaches a set value of 180 ℃.
The third pipeline 15 is provided with a flow meter L1 and a first pressure gauge P1, the fourth pipeline 16 is provided with a second pressure gauge P2, the sixth pipeline 18 is provided with a vacuum gauge Z1, and the vacuum gauge Z1 is positioned between the heat exchange fan 23 and the inflation solenoid valve V1.
According to the invention, the adsorbent in the adsorption tower is uniformly heated and heated in a circulating mode after the inert nitrogen is heated, and then the adsorption tower is vacuumized, so that online pressure reduction and heating regeneration are realized, the uniform distribution of the temperature in the cavity of the adsorption tower can be effectively realized, the heating pipe and the adsorbent are completely isolated, the potential safety risks that the operation of workers is careless, a temperature control system cannot protect in time and the like are avoided, the problem that the air tightness of the device is influenced by loading and unloading is thoroughly solved, the regeneration period of the adsorbent is greatly prolonged, and the cyclic use of the adsorbent is realized.
In the present embodiment, the heat exchanging fan 23, the aeration electromagnetic valve V1, the vacuum pump 21, the lye tank 20, the two-position three-way valve S6, the thermocouple 26, the controller, the second platinum resistor 27 and the first platinum resistor 29 are all commercially available products.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention by those skilled in the art should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. SF (sulfur hexafluoride)6The online regeneration method of the adsorbent of the purification treatment device is characterized by comprising the following steps:
(1) intercepting nitrogen gas inlet pipeline (10) and SF6An air inlet pipeline (11), a first pipeline (13), a second pipeline (14), a third pipeline (15), a fourth pipeline (16), a fifth pipeline (17), a sixth pipeline (18) and a seventh pipeline (19);
(2) introducing nitrogen into the pipeline (10) and SF6The outlet of the air inlet pipeline (11) is communicated with the inlet of the first pipeline (13), the outlet of the first pipeline (13) is communicated with the inlet of the heating unit (25), the outlet of the heating unit (25) is communicated with the inlet of the third pipeline (15), the outlets of the third pipeline (15) and the second pipeline (14) are communicated with the inlet of the adsorption tower (24), the outlet of the adsorption tower (24) is communicated with the inlet of the fourth pipeline (16), and the outlet of the fourth pipeline (16) is communicated with the inlets of the fifth, sixth and seventh pipelines;
(3) a manual valve S1 is arranged on the nitrogen gas inlet pipeline (10), SF6Air inlet pipe (11)) A manual valve S10 is installed on the upper portion, a pressure reducing valve (12) and a manual valve S2 are installed on the front portion and the rear portion of a first pipeline (13) respectively, the inlet of a second pipeline (14) is located between the pressure reducing valve (12) and the manual valve S2 and is communicated with the first pipeline (13), a manual valve S3 is installed on the second pipeline (14), a manual valve S4 is installed on a third pipeline (15), a manual valve S7, a filter (22) and a manual valve S8 are installed on a fifth pipeline (17), a manual valve S9 and a vacuum pump (21) are installed on a sixth pipeline (18), a manual valve S5 and a two-position three-way valve S6 are installed on a seventh pipeline (19), and the manual valve S5 is located at the inlet end;
(4) the outlet of the sixth pipeline (18) is communicated with the outlet of the seventh pipeline (19), the inlet of the lye tank (20) is communicated with the air outlet of a two-position three-way valve S6, and the tail gas outlet of the lye tank (20) is communicated with the outside;
(5) performing normal purification treatment
The manual valves S1, S2, S4, S9, S5 and the two-position three-way valve S6 are closed, and SF is mixed with6SF is accessed to an outlet of a buffer tank of a processing unit of the purification processing device6The inlet of the air inlet pipe (11) and the outlet of the fifth pipe (17) is inserted into SF6The inlet of the power unit of the purification treatment device is adjusted by a pressure reducing valve (12) to SF6The gas pressure is reduced to 0.6MPa, and under the action of the pressure, SF6Gas enters an adsorption tower (24) through a manual valve S10, a pressure reducing valve (12) and a manual valve S3 in sequence, is subjected to pressure swing adsorption by the adsorption tower, then enters a power unit through an outlet of the adsorption tower, the manual valve S7, a filter (22) and the manual valve S8 in sequence, and finally is pumped to a cryogenic unit by a compressor of the power unit for purification treatment;
(6) when the adsorption capacity of the adsorbent in the adsorption tower (24) is reduced or the treatment capacity is lost, firstly, closing manual valves S10, S3, S7, S8 and S9, opening manual valves S1, S2, S4, S5 and a two-position three-way valve S6, then connecting a nitrogen steel cylinder with the purity of 99.999% into a nitrogen gas inlet pipeline (10), opening a steel cylinder valve, adjusting a pressure reducing valve (12) to reduce the gas pressure of the nitrogen gas to 1MPa, allowing the nitrogen gas to sequentially enter a heating unit (25) through the manual valve S1, the pressure reducing valve (12) and the manual valve S2 under the pressure effect of heat exchange, allowing the nitrogen gas with the temperature of 200 ℃ to flow out of an outlet of the heating unit (25), enter the adsorption tower (24) through the manual valve S4, then enter an alkali liquor tank (20) through the manual valve S5 and the two-position three-way valve S6 for neutralization treatment, and finally discharging the tail gas from an alkali liquor tank (20) to the;
(7) when the average temperature of each part in the inner cavity of the adsorption tower (24) reaches 180 ℃, the heating unit is closed, the pressure of the inner cavity of the adsorption tower is reduced to the atmospheric pressure, and then the manual valves S1, S2, S4 and S5 are closed in sequence;
(8) switching a two-position three-way valve S6 to enable the outlet of the vacuum pump (21) to be communicated with the inlet of the lye tank (20), opening a manual valve S9 and the vacuum pump (21) to vacuumize the adsorption tower (24), closing the manual valve S9 and the vacuum pump (21) when the pressure reaches 50Pa, opening a manual valve S5 and switching a two-position three-way valve S6 to enable the outlet of the adsorption tower (24) to be communicated with the inlet of the lye tank (20);
(9) the adsorption tower (24) is cooled by introducing nitrogen into the adsorption tower, and can be used after reaching normal temperature.
2. SF according to claim 16The method for regenerating the adsorbent of the purification treatment device on line is characterized in that: two groups of heating units (25) are arranged in parallel, one heating unit is arranged above the other heating unit, each group of heating units (25) comprises a heat-insulating container (251), heating pipes (253) and a plurality of partition plates (252) which are arranged in the inner cavity of the heat-insulating container (251) in an axially staggered manner, the heating pipes (253) extend into the inner cavity of the heat-insulating container (251), the tail parts of the two heat-insulating containers (251) are communicated in series through the flange, a thermocouple (26) is installed at the tail part of each heat-insulating container (251), a safety valve (28) is installed in the middle of the upper heat-insulating container, a second platinum resistor (27) is installed at the position, close to the head part, of the lower heat-insulating container, a support (254) is installed at the bottom of the lower heat-insulating container (251), and the heating pipe (253), the thermocouple (26) and the second platinum resistor (27) are all electrically connected with the controller.
3. SF according to claim 26The method for regenerating the adsorbent of the purification treatment device on line is characterized in that: three first platinum resistors (29) are sequentially arranged on the side wall of the adsorption tower (24) from top to bottom, and the three first platinum resistors (29) are electrically connected with a controllerAnd (4) connecting.
4. SF according to any of claims 1 to 36The method for regenerating the adsorbent of the purification treatment device on line is characterized in that: and a heat exchange fan (23) is mounted on the sixth pipeline (18), and the heat exchange fan (23) is positioned between the manual valve S9 and the vacuum pump (21).
5. SF according to claim 46The method for regenerating the adsorbent of the purification treatment device on line is characterized in that: and an inflation solenoid valve V1 is mounted on the sixth pipeline (18), and the inflation solenoid valve V1 is positioned between the heat exchange fan (23) and the vacuum pump (21).
6. SF according to claim 56The method for regenerating the adsorbent of the purification treatment device on line is characterized in that: the third pipeline (15) is provided with a flow meter L1 and a first pressure gauge P1, the fourth pipeline (16) is provided with a second pressure gauge P2, the sixth pipeline (18) is provided with a vacuum gauge Z1, and the vacuum gauge Z1 is positioned between the heat exchange fan (23) and the inflation solenoid valve V1.
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| CN113244738B (en) * | 2021-05-08 | 2024-03-19 | 洛阳中硅高科技有限公司 | Adsorption device |
| CN114849414A (en) * | 2022-04-19 | 2022-08-05 | 安徽新力电业科技咨询有限责任公司 | Liquid SF for recovery 6 Method for cleaning a plant |
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