CN102716667A - Ammonia regeneration method and device for activated coke - Google Patents
Ammonia regeneration method and device for activated coke Download PDFInfo
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- CN102716667A CN102716667A CN2012102391104A CN201210239110A CN102716667A CN 102716667 A CN102716667 A CN 102716667A CN 2012102391104 A CN2012102391104 A CN 2012102391104A CN 201210239110 A CN201210239110 A CN 201210239110A CN 102716667 A CN102716667 A CN 102716667A
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Abstract
The invention discloses an ammonia regeneration method and an ammonia regeneration device for activated coke. The device comprises an activated coke regeneration tower 1, a flue 2, an electric heater 3, an NH3 measurement device 4, an NH3 spraying device 5, a computer control end 11 and a fan 12, wherein a baffle plate is arranged in the activated coke regeneration tower 1 and divides the activated coke regeneration tower 1 into a regeneration heating reaction region I and a regeneration cooling region II; the electric heater 3 and the NH3 measurement device 4 are respectively arranged on the flue 2 between the region I and the region II of the activated coke regeneration tower 1; the NH3 spraying device 5 is arranged on the flue 2 between the NH3 measurement device 4 and the region II; the fan 12 is arranged on the flue 2 between the NH3 spraying device 5 and the region II; and the NH3 measurement device 4, the NH3 spraying device 5 and the fan 12 are respectively connected with the computer control end 11. 1 to 10 percent of ammonia is added into the sweep gas, so that the energy consumption is reduced, and the utilization efficiency of the activated coke is improved.
Description
Technical field
the present invention relates to a kind of ammonia regeneration method and device of activated coke, belong to the flue gases purification field.
Background technology
moving-bed active coke associating removing process is by German Bergbau Forschung company (BF), the common exploitation of Mitsui mine Mitsui Mining (MMC); The back is purchased by U.S. Ma Sulai green technology company (MET); Form the MET-Mitsui-BF technology, should technology be applied on the polytype boiler in Duo Jia power station at present.Wherein the regeneration of activated coke is to unite one of requisite technology in the technology of removing, and regeneration level directly affects the follow-up desulphurization denitration ability of activated coke.Generally all adopt the method for heat regeneration in the present activated coke regeneration technology, and the separation and the recycling unit of regenerator need be set in addition.
The patent No. is that the United States Patent (USP) of US6103205 adopts the method regeneration activity of hot flue gas heating burnt in the desulfurization denitration demercuration associating removing process at the same time, though this technology has reduced operating cost, owing to contain 3～5% O in the flue gas
2
, cause the ablation of charcoal during 400 ℃ of regeneration, not only increase the chemistry consumption charcoal of process, reduced the intensity of activated coke, and regeneration temperature there is the potential danger property of breaking out of fire near the activated coke burning-point.
The patent No. is that the regeneration reactor that the Chinese patent " a kind of activated coke desulfurization denitrating system and process " of CN 102430318 A discloses adopts electrically heated method that activated coke is heated to 350～450 ℃; Energy consumption is big, and CO and SO in the regeneration accessory substance
2
Not easily separated.
patent No. is to disclose in the Chinese patent " the activated coke regenerative feed heating system in the activated coke boiler flue gas desulfurization system " of CN 202010498 U a kind ofly to adopt boiler smoke and through the burnt device of heat exchanger indirect regeneration activity; Reduced energy consumption, but the CO in the accessory substance of regenerating need separate still.
To sum up, existing activated coke is united the method that the mode of heating that removes activated coke regenerator in the device mostly adopts heat regeneration, and follow-up separation of C O device and SO must be set
2
The resource retracting device, equipment is huge, increases operating cost.
Summary of the invention
the objective of the invention is to; A kind of ammonia regeneration method and device of activated coke are provided; It can effectively solve the serious problem of charcoal ablation that the energy consumption that needs in the problem, particularly activated coke regenerative process of prior art existence is big and cause.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 250～350 ℃ be 1%～10% sweep gas to activated coke heating carry out regenerative response, the reaction time is 60～90min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 1%～10%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
Ammonia content described in the step S1 is 1%～10% sweep gas, is meant that composition does
With
, any one or multiple inert gas such as Ar, He mist.
In the regenerative response of step S1, activated coke and ammonia will as reducing agent
Be reduced to SO
2
, the Hg of chemical combination attitude is reduced to simple substance Hg, product is CO
2
And CO, and CO reacts with oxide that regenerative response generates in the process of constantly circulation, generates CO
2
Wherein, the reaction consumes of activated coke and oxygen-containing functional group has been protected in the oxygen-containing functional group reaction on 1%～10% ammonia that contains in the sweep gas and activated coke surface, in addition, can replace a part of activated coke, the general
Be reduced to SO
2
, Hg is reduced to simple substance Hg with the chemical combination attitude, thereby has reduced the chemical depletion of activated coke.
In the regenerative response of
step S1, the reaction time can cause during less than 60min reaction insufficient, has part of sulfuric acid not to be reduced; Reaction time can be caused unnecessary prolongation heat time heating time during greater than 90min, increases energy consumption.
The ammonia regeneration method of
aforesaid activated coke; Among the step S1; The ammonia content that is heated to 300 ℃ be 5% sweep gas to activated coke heating carry out regenerative response, the reaction time is 80min, thus chemistry consumption charcoal is less when making activated coke regeneration, activated coke intensity is the highest.
The ammonia regeneration method of
aforesaid activated coke; Step S2 also comprises: the size according to gas pressure in the flue is opened air bleeding valve automatically; Gas is discharged in the tank; Thereby make that these pernicious gases such as sulfur dioxide, ammonia are water-soluble, the pernicious gas of avoiding when extraneous exhaust, discharging atmosphere to external world pollutes.
The ammonia regeneration method of aforesaid activated coke, step S2 also comprises: the regeneration gas that regenerative response generates is flowed to the flue gas measurement mechanism in the flue with sweep gas by extraction; Flue gas measurement mechanism measuring N H
3
And SO
2
Content, if NH
3
Volume fraction less than 2 times of SO
2
Volume fraction, then add NH
3
, make NH
3
Volume fraction more than or equal to 2 times of SO
2
Volume fraction; The sulfurous acid ammonium salt is lowered the temperature, reacts and crystallized into to regeneration gas with gaseous purge stream to the ammonium sulfite crystallization tank; Measure SO
2
Content, and automatically regulate in view of the above and add NH
3
,, can in regeneration, carry out recycling treatment, the SO that regenerative response produces through using said method
2
With the NH that adds in the sweep gas
3
Directly reaction, crystallization generate and can be used as the ammonium sulfite of chemical fertilizer, and do not need to be provided with in addition SO
2
Retracting device, device and technology are simple, practice thrift place and operating cost.
Realize the ammonia regeneration device of a kind of activated coke of preceding method, comprising: activated coke regenerator, flue, electric heater, NH
3
Measurement mechanism, NH
3
Injection apparatus, computer control end and blower fan are provided with baffle plate in the activated coke regenerator, and the activated coke regenerator is divided into regeneration I district, reacting by heating district and regeneration II district, cooling zone, electric heater and NH
3
Measurement mechanism is located at respectively on the flue between activated coke regenerator I district and the II district, NH
3
Injection apparatus is located at NH
3
On the flue between measurement mechanism and the II district, blower fan is located at NH
3
On the flue between injection apparatus and the II district, NH
3
Measurement mechanism, NH
3
Injection apparatus is connected with the computer control end respectively with blower fan.
In the ammonia regeneration device of aforesaid activated coke, described NH
3
Also be provided with air bleeding valve, tank and air gauge on the flue between measurement mechanism and the activated coke regenerator I district, air bleeding valve is connected through blast pipe with tank; Air bleeding valve is connected with the computer control end respectively with air gauge, gas is discharged in the tank, thereby makes that these pernicious gases such as sulfur dioxide, ammonia are soluble in water, and the pernicious gas of avoiding when extraneous exhaust, discharging atmosphere to external world pollutes.
In the ammonia regeneration device of aforesaid activated coke, also be provided with SO on the flue between described activated coke regenerator I district and the air bleeding valve successively
2
Measurement mechanism, NH
3
Measurement mechanism, NH
3
Injection apparatus, ammonium sulfite crystallization tank and SO
2
Measurement mechanism, SO
2
Measurement mechanism, NH
3
Measurement mechanism, NH
3
Injection apparatus is connected with the computer control end respectively.The regeneration gas that regenerative response generates is flowed to the flue gas measurement mechanism with sweep gas by extraction; Flue gas measurement mechanism measuring N H
3
And SO
2
Content, if NH
3
Volume fraction less than 2 times of SO
2
Volume fraction, then add NH
3
, make NH
3
Volume fraction more than or equal to 2 times of SO
2
Volume fraction; The sulfurous acid ammonium salt is lowered the temperature, reacts and crystallized into to regeneration gas with gaseous purge stream to the ammonium sulfite crystallization tank; Measure SO
2
Content, and automatically regulate in view of the above and add NH
3
The sulfurous acid ammonium salt is lowered the temperature, reacts and crystallized into to regeneration gas with gaseous purge stream to the ammonium sulfite crystallization tank; SO in the sweep gas after the measurement crystallization
2
Content, and automatically regulate in view of the above and add NH
3
,, can in regeneration, carry out recycling treatment, the SO that regenerative response produces through using said method
2
With the NH that adds in the sweep gas
3
Directly reaction, crystallization generate and can be used as the ammonium sulfite of chemical fertilizer, and do not need to be provided with in addition SO
2
Retracting device, device and technology are simple, practice thrift place and operating cost.
Compared with prior art, the present invention has following advantage when realizing activated coke regeneration:
1, the present invention can be reduced to 250～350 ℃ with the regeneration temperature of activated coke through after in sweep gas, adding 1%～10% ammonia, and the reaction temperature that promptly can significantly reduce the activated coke regenerative response reaches 50～150 ℃, has reduced energy consumption.
After
, ammonia regeneration replaced heat regeneration, ammonia was as reducing agent, and it is oxidized to suppress the activated coke surface oxygen, thereby can reduce the ablation degree of activated coke, improves the utilization ratio of activated coke.Show that according to the mass data statistics when adopting the present invention to carry out the activated coke regenerative response, the chemical depletion of activated coke can reduce 15%.
, the present invention carries out recycling treatment, the SO that regenerative response produces in activated coke regeneration
2
NH with the capacity of adding in the sweep gas
3
Directly reaction, and crystallization generates the ammonium sulfite that can be used as chemical fertilizer in the ammonium sulfite crystallization tank, device and technology are simple, not only can remove accessory substance SO
2
, and do not need to be provided with in addition SO
2
Retracting device has been practiced thrift place and operating cost.In addition, with SO
2
After from regeneration gas, separating; Thereby sweep gas and accessory substance CO etc. can be recycled, after the accessory substance CO that promptly the regenerates circulation, can again as reducing agent protection charcoal ablate the same with ammonia; And CO can participate in regenerative response, is the CO of nonhazardous effect by the sulfuric acid oxidation in the activated coke
2
, do not need other equipment to come CO is separated, handles.
, air bleeding valve are opened, and gas is discharged in the tank, can be so that pernicious gases such as sulfur dioxide, ammonia be soluble in water, and avoid when extraneous exhaust, discharging atmosphere is polluted.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the present invention;
Fig. 2 is the syndeton sketch map of other hardware and computer control end among the present invention;
Fig. 3 is the workflow diagram of a kind of embodiment of the present invention.
Reference numeral: 1-activated coke regenerator, 2-flue, 3-electric heater, 4-NH
3
Measurement mechanism, 5-NH
3
Injection apparatus, 6-air bleeding valve, 7-tank, 8-SO
2
Measurement mechanism, 9-ammonium sulfite crystallization tank, 10-air gauge, 11-computer control end, 12-blower fan.
are further described the present invention below in conjunction with the accompanying drawing and the specific embodiment.
The specific embodiment
Embodiments of the invention 1: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 300 ℃ be 5% sweep gas to activated coke heating carry out regenerative response, the reaction time is 80min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 5%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
step S2 also comprises: the size according to gas pressure in the flue is opened air bleeding valve automatically, and gas is discharged in the tank.
Step S2 also comprises: the regeneration gas that regenerative response generates is flowed to the flue gas measurement mechanism in the flue with sweep gas by extraction; Flue gas measurement mechanism measuring N H
3
And SO
2
Content, if NH
3
Volume fraction less than 2 times of SO
2
Volume fraction, then add NH
3
, make NH
3
Volume fraction more than or equal to 2 times of SO
2
Volume fraction; The sulfurous acid ammonium salt is lowered the temperature, reacts and crystallized into to regeneration gas with gaseous purge stream to the ammonium sulfite crystallization tank; Measure SO
2
Content, and automatically regulate in view of the above and add NH
3
Realize the ammonia regeneration device of a kind of activated coke of said method, like Fig. 1, shown in Figure 2, comprising: activated coke regenerator 1, flue 2, electric heater 3, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5, computer control end 11 and blower fan 12 are provided with baffle plate in the activated coke regenerator 1, and activated coke regenerator 1 is divided into regeneration I district, reacting by heating district and regeneration II district, cooling zone, electric heater 3 and NH
3
Measurement mechanism 4 is located at respectively on the flue 2 between activated coke regenerator 1I district and the II district, NH
3
Injection apparatus 5 is located at NH
3
On the flue 2 between measurement mechanism 4 and the II district, blower fan 12 is located at NH
3
On the flue 2 between injection apparatus 5 and the II district, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5 is connected with computer control end 11 respectively with blower fan 12.
Described NH
3
Also be provided with air bleeding valve 6, tank 7 and air gauge 10 on the flue 2 between measurement mechanism 4 and the activated coke regenerator 1I district, air bleeding valve 6 and tank 7 are connected through blast pipe; Air bleeding valve 6 is connected with computer control end 11 respectively with air gauge 10.
Also be provided with SO on the flue 2 between described activated coke regenerator 1I district and the air bleeding valve 6 successively
2
Measurement mechanism 8, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5, ammonium sulfite crystallization tank 9 and SO
2
Measurement mechanism 8, SO
2
Measurement mechanism 8, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5 is connected with computer control end 11 respectively.
wherein, relevant control software is integrated in the computer control end 11, also can be integrated in the control software-scattered control system (DCS system) of active coke desulphurizing system.The operations staff manually or automatically controls through the DCS system during operation.The DCS system is the control module commonly used in the process routes such as present main flow desulfurization, denitration, and above control mode those skilled in the art do not need illustrated in detail to implement.In addition, flue 2, electric heater 3, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5, air bleeding valve 6, SO
2
Measurement mechanism 8, the concrete parameter choosing type that air gauge 10 can provide according to technology; Activated coke regenerator 1, tank 7, ammonium sulfite crystallization tank 9 need the design working drawing customization according to concrete engineering, and be concrete,
Two aspects need be considered when 1. activated coke regenerator 1 customizes in
: the heat exchange area of regenerator volume and heat exchangers in towers (comprising bringing-up section I district and cooling section II district).The regenerator volume has determined regenerator to handle the ability of activated coke, thereby the design of regenerator volume need will consider the activated coke volume flow and the time of staying (comprise regenerative response time and cool time) of activated coke in regenerator of regeneration.The function of regeneration heat exchangers in towers is in design time, pending activated coke to be heated (or cooling) to design temperature, needs according to pending activated coke quality, sweep gas temperature computation heat exchanger heat exchange area.
. the main effect of tank 7 is to store enough absorption liquids (for example water), when air bleeding valve needs exhaust, absorbs to discharge the SO that possibly exist in the gas
2
, NH
3
Deng gas (content of CO seldom can be ignored), only need consider volume during design.The palpus of tank volume guarantees the interior all SO of the enough complete absorption system of absorption liquid in the tank
2
And NH
3
In addition since absorb gas and all have certain corrosivity, the tank material need be considered anticorrosion.
. ammonium sulfite crystallization tank 9 is actually a heat exchanger, is used to reduce the temperature of regeneration gas.When temperature reduces, NH
3
And SO
2
Spontaneous nucleation under oxygen free condition.Crystallization tank needs according to the flow rate calculation heat exchange area that goes out the sweep gas temperature and the sweep gas of regenerator in design.Generally be designed to snake type or U type.For preventing that solid crystal from stopping up crystallization tank, being convenient to crystallization tank is keeped in repair and clears up, and should design at least 2 crystallization tanks and recycle.
The calculating that
above design process relates to, the designer of relevant speciality all can smooth implementation according to above description.
Embodiment 2: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 350 ℃ be 10% sweep gas to activated coke heating carry out regenerative response, the reaction time is 90min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 10%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
step S2 also comprises: the size according to gas pressure in the flue is opened air bleeding valve automatically, and gas is discharged in the tank.
Realize the ammonia regeneration device of a kind of activated coke of said method, like Fig. 1, shown in Figure 2, comprising: activated coke regenerator 1, flue 2, electric heater 3, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5, computer control end 11 and blower fan 12 are provided with baffle plate in the activated coke regenerator 1, and activated coke regenerator 1 is divided into regeneration I district, reacting by heating district and regeneration II district, cooling zone, electric heater 3 and NH
3
Measurement mechanism 4 is located at respectively on the flue 2 between activated coke regenerator 1I district and the II district, NH
3
Injection apparatus 5 is located at NH
3
On the flue 2 between measurement mechanism 4 and the II district, blower fan 12 is located at NH
3
On the flue 2 between injection apparatus 5 and the II district, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5 is connected with computer control end 11 respectively with blower fan 12.
Described NH
3
Also be provided with air bleeding valve 6, tank 7 and air gauge 10 on the flue 2 between measurement mechanism 4 and the activated coke regenerator 1I district, air bleeding valve 6 and tank 7 are connected through blast pipe; Air bleeding valve 6 is connected with computer control end 11 respectively with air gauge 10.
Embodiment 3: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 300 ℃ be 5% sweep gas to activated coke heating carry out regenerative response, the reaction time is 80min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 5%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
Embodiment 4: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 250 ℃ be 1% sweep gas to activated coke heating carry out regenerative response, the reaction time is 60min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 1%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
Embodiment 5: a kind of ammonia regeneration method of activated coke may further comprise the steps:
S1, the ammonia content that is heated to 350 ℃ be 10% sweep gas to activated coke heating carry out regenerative response, the reaction time is 90min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3
Content also adds NH according to measurement result
3
, make that the ammonia content in the sweep gas is 10%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
Realize the ammonia regeneration device of a kind of activated coke of the foregoing description 3,4 or 5 said methods, like Fig. 1, shown in Figure 2, comprising: activated coke regenerator 1, flue 2, electric heater 3, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5, computer control end 11 and blower fan 12 are provided with baffle plate in the activated coke regenerator 1, and activated coke regenerator 1 is divided into regeneration I district, reacting by heating district and regeneration II district, cooling zone, electric heater 3 and NH
3
Measurement mechanism 4 is located at respectively on the flue 2 between activated coke regenerator 1I district and the II district, NH
3
Injection apparatus 5 is located at NH
3
On the flue 2 between measurement mechanism 4 and the II district, blower fan 12 is located at NH
3
On the flue 2 between injection apparatus 5 and the II district, NH
3
Measurement mechanism 4, NH
3
Injection apparatus 5 is connected with computer control end 11 respectively with blower fan 12.
The operation principle of a kind of embodiment of the present invention (as shown in Figure 3):
Being heated to 300 ℃ ammonia content through electric heater 3 is that 5% sweep gas is carried out regenerative response to the activated coke heating in activated coke regenerator 1 I district, and the reaction time is 80min; Reacted activated coke flows to activated coke regenerator 1II district, and the regeneration gas that reaction is generated is extracted by blower fan 12 with sweep gas and flows to the flue gas measurement mechanism in the flue 2, and described flue gas measurement mechanism specifically comprises NH
3
Measurement mechanism 4 and SO
2
Measurement mechanism 8; NH
3
Measurement mechanism 4 and SO
2
Measurement mechanism 8 is measured NH in the sweep gas respectively
3
And SO
2
Content, if NH
3
Volume fraction less than 2 times of SO
2
Volume fraction, computer control end 11 control NH then
3
Injection apparatus 5 sprays into NH in flue 2
3
, make NH
3
Volume fraction more than or equal to 2 times of SO
2
Volume fraction; Regeneration gas is lowered the temperature, is reacted and crystallize into the sulfurous acid ammonium salt to ammonium sulfite crystallization tank 9 with gaseous purge stream; SO
2
Measurement mechanism 8 is measured the SO in the sweep gas after the crystallization
2
Content, if flue 2 in still have SO
2
Exist, then computer control end 11 is regulated NH automatically
3
Injection apparatus 5 sprays into NH
3
Air gauge 10 is measured the air pressure of gas in the flue 2, and when air pressure was higher than predetermined value, computer control end 11 control air bleeding valves 6 were opened automatically, and gas is discharged in the tank 7.NH
3
The NH that measurement mechanism 4 is measured in the sweep gas
3
Content, computer control end 11 is according to measurement result control NH
3
Injection apparatus 5 sprays into NH
3
, make that the ammonia content in the sweep gas is 5%; Sweep gas gets into activated coke regenerator 1II district the activated coke of regenerating is completely cooled off; The sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator 1I district, so circulation through electric heater 3.
Reaction in the regenerator comprises:
wherein ,-COOH, the oxygen-containing functional group on-COH etc. expression activated coke surface, the key that-expression links to each other with active carbon.
Reaction in the crystallization tank comprises:
Claims (7)
1. the ammonia regeneration method of an activated coke is characterized in that, may further comprise the steps:
S1, the ammonia content that is heated to 250～350 ℃ be 1%～10% sweep gas to activated coke heating carry out regenerative response, the reaction time is 60～90min;
S2, reacted activated coke flows to activated coke regenerator II district, and the regeneration gas that reaction is generated is flowed to flue with sweep gas by extraction;
S3 measures the NH in the sweep gas
3Content also adds NH according to measurement result
3, make that the ammonia content in the sweep gas is 1%～10%;
S4, sweep gas gets into activated coke regenerator II district the activated coke of regenerating is completely cooled off;
S5, the sweep gas that extracts in the activated coke regenerator II district heats back injection activated coke regenerator I district, forwards S1 to.
2. the ammonia regeneration method of activated coke according to claim 1 is characterized in that, among the step S1, the ammonia content that is heated to 300 ℃ be 5% sweep gas to activated coke heating carry out regenerative response, the reaction time is 80min.
3. the ammonia regeneration method of activated coke according to claim 1 is characterized in that, step S2 also comprises: the size according to gas pressure in the flue is opened air bleeding valve automatically, and gas is discharged in the tank.
4. according to the ammonia regeneration method of claim 1,2 or 3 described activated coke, it is characterized in that step S2 also comprises: the regeneration gas that regenerative response generates is flowed to the flue gas measurement mechanism in the flue with sweep gas by extraction; Flue gas measurement mechanism measuring N H
3And SO
2Content, if NH
3Volume fraction less than 2 times of SO
2Volume fraction, then add NH
3, make NH
3Volume fraction more than or equal to 2 times of SO
2Volume fraction; The sulfurous acid ammonium salt is lowered the temperature, reacts and crystallized into to regeneration gas with gaseous purge stream to the ammonium sulfite crystallization tank; Measure SO
2Content, and automatically regulate in view of the above and add NH
3
5. realize the ammonia regeneration device of a kind of activated coke of the said method of claim 1～4, it is characterized in that, comprising: activated coke regenerator (1), flue (2), electric heater (3), NH
3Measurement mechanism (4), NH
3Injection apparatus (5), computer control end (11) and blower fan (12), the activated coke regenerator is provided with baffle plate in (1), and activated coke regenerator (1) is divided into regeneration I district, reacting by heating district and regeneration II district, cooling zone, electric heater (3) and NH
3Measurement mechanism (4) is located at respectively on the flue (2) between activated coke regenerator (1) I district and the II district, NH
3Injection apparatus (5) is located at NH
3On the flue (2) between measurement mechanism (4) and the II district, blower fan (12) is located at NH
3On the flue (2) between injection apparatus (5) and the II district, NH
3Measurement mechanism (4), NH
3Injection apparatus (5) is connected with computer control end (11) respectively with blower fan (12).
6. the ammonia regeneration device of activated coke according to claim 5 is characterized in that, described NH
3Also be provided with air bleeding valve (6), tank (7) and air gauge (10) on the flue (2) between measurement mechanism (4) and activated coke regenerator (1) the I district, air bleeding valve (6) is connected through blast pipe with tank (7); Air bleeding valve (6) is connected with computer control end (11) respectively with air gauge (10).
7. the ammonia regeneration device of activated coke according to claim 6 is characterized in that, also is provided with SO successively on the flue (2) between described activated coke regenerator (1) I district and the air bleeding valve (6)
2Measurement mechanism (8), NH
3Measurement mechanism (4), NH
3Injection apparatus (5), ammonium sulfite crystallization tank (9) and SO
2Measurement mechanism (8), SO
2Measurement mechanism (8), NH
3Measurement mechanism (4), NH
3Injection apparatus (5) is connected with computer control end (11) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108855247A (en) * | 2018-08-09 | 2018-11-23 | 国电环境保护研究院有限公司 | A kind of regeneration method and device of the carbon base catalyst suitable for flue gas purification system |
| CN113651325A (en) * | 2021-08-16 | 2021-11-16 | 宁夏宁疆疆泰炭材料科技有限公司 | Production equipment and process for manufacturing desulfurization and denitrification active coke by using multi-stage furnace |
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| CN102716667B (en) | 2015-02-25 |
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Address after: 100035, building 5, building B, Huadian building, No. 273 Xizhimen Main Street, Xicheng District, Beijing Patentee after: CHINA HUADIAN ENGINEERING CO., LTD. Patentee after: Huadian Environmental Protection System Engineering Co., Ltd. Address before: 100035, building 5, building B, Huadian building, No. 273 Xizhimen Main Street, Xicheng District, Beijing Patentee before: China Huadian Engineering (Group) Co., Ltd. Patentee before: Huadian Environmental Protection System Engineering Co., Ltd. |