CN204973600U - Low temperature SCR catalyst on -line regeneration device - Google Patents
Low temperature SCR catalyst on -line regeneration device Download PDFInfo
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- CN204973600U CN204973600U CN201520696940.9U CN201520696940U CN204973600U CN 204973600 U CN204973600 U CN 204973600U CN 201520696940 U CN201520696940 U CN 201520696940U CN 204973600 U CN204973600 U CN 204973600U
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Abstract
The utility model provides a low temperature SCR catalyst on -line regeneration device. This on -line regeneration device includes the SCR reactor, the access connection flue gas admission line of SCR reactor, the exit linkage flue gas pipeline of giving vent to anger, wherein, still include flue gas heating system and flying dust purge system, flue gas heating system's heating termination is gone into on the flue gas admission line for heat for the flue gas, the SCR catalyst top in SCR reactor portion is fixed to flying dust purge system's the end that sweeps. The utility model discloses a sulphate is fallen in elder generation's hyperthermic treatment, and later through sweeping the siO2 that remains who disposes the surface, to among glass trade industrial boiler deposition, that sulphate blocks up serious SCR low temperature catalysis regeneration treatment effect is obvious, the catalyst need not dismantled and to carry out regeneration treatment moreover, has simplified the regeneration flow.
Description
Technical field
The utility model relates to SCR catalyst technical field, especially relates to low-temperature SCR catalyst on-line regeneration facility.
Background technology
At present, due to cogeneration and the use of other energy-saving equipment, the smog discharge temperature of existing many industrial pot (kiln) furnace apparatus run of China is lower, use high temperature SCR Catalytic processes to be difficult to NOx emission to control, so need to promote low-temperature SCR technology and low temperature SCR denitration catalyst in non-electricity industry.
In low-temperature SCR technique extension process, due to the SO containing higher concentration in the flue gas of coal-burned industrial boiler
2gas, on selective catalytic reduction catalysts, SO
2sO can be oxidized to
3, SO
3then at NH
3with reducing agent NH in-SCR reaction system
3reaction, generates the sticking NH of tool
4hSO
4adhere on a catalyst, simultaneously small part SO
2flying dust also can stick to NH
4hSO
4on, cause active rapid deactivation, catalyst life significantly reduces, therefore, the regeneration process of SCR catalyst is just extremely urgent, carry out regenerating the replacement cost that process can reduce SCR catalyst to SCR catalyst, the secondary pollution simultaneously also avoiding decaying catalyst to bring, has good economic message and environmental benefit.
The SCR catalyst renovation process generally adopted at present comprises regenerate with water, hot recycling, thermal reduction regeneration, pickling regeneration and SO
2acidifying regeneration etc., but these renovation process all need catalyst to remove from reactor to shift out.Especially a large amount of SiO is contained in smoke components
2in the glass industry of flying dust, even if after dedusting, still have small part along with NH
4hSO
4wrap catalyst together, general catalyst life is significantly reduced, use conventional regeneration means, just need frequent dismounting catalyst and general chemical method is difficult to eliminate SiO
2impact, finally improve the operating cost of equipment.
Utility model content
The purpose of this utility model is to provide low-temperature SCR catalyst on-line regeneration facility, for the on-line regeneration facility that low-temperature SCR catalyst proposes, solves the technical problem that the existing regeneration process to low-temperature SCR catalyst needs frequent dismounting to cause operating cost to improve.
In order to achieve the above object, the utility model provides following technical scheme:
Low-temperature SCR catalyst on-line regeneration facility, comprises SCR reactor, and the import of SCR reactor connects smoke inlet pipe road, and outlet connects flue gas outlet pipe; Wherein, also comprise flue gas heating system and flying dust purging system, on the fire end access smoke inlet pipe road of described flue gas heating system, for giving flue gas; The purging end of described flying dust purging system is fixed on above the SCR catalyst of SCR inside reactor.
Particularly, described flue gas heating system comprises combustion furnace, and the port of described combustion furnace is fixed in smoke inlet pipe road.
Further, also comprise temperature control system, the temperature monitoring end of described temperature control system is fixed on the import department of described SCR reactor, and output is connected with the control end of described flue gas heating system; When the temperature that temperature monitoring end monitors the heat smoke of the import department of SCR reactor is higher than setting value, output controls flue gas heating system and stops heating; When the temperature that temperature monitoring end monitors the heat smoke of the import department of SCR reactor is lower than setting value, output controls flue gas heating system and starts heating.Based Intelligent Control enters the temperature of SCR inside reactor heat smoke.
Further, also comprise smoke circulating system, the export and import of SCR reactor is communicated with by the entrance and exit of described smoke circulating system respectively, realizes the circulation of heat smoke in SCR reactor after the heating of described flue gas heating system.In the regenerative process of low-temperature SCR catalyst, ensure that the homogeneous temperature of SCR inside reactor heat smoke is stablized.
Particularly, described smoke circulating system comprises circulation air-introduced machine, air intake valve and air-out valve, and the entrance of described circulation air-introduced machine is connected with the outlet of described SCR reactor, the pipeline of connection is arranged air intake valve; The outlet of described circulation air-introduced machine is connected with the import of described SCR reactor, and the pipeline of connection sets out air valve.
Further, described smoke inlet pipe road connects total air intake valve, described flue gas outlet pipe connects valve of always giving vent to anger; On flue gas outlet pipe between the outlet of entrance access described always give vent to anger valve and the described SCR reactor of described smoke circulating system; On smoke inlet pipe road between the outlet described total air intake valve of access of described smoke circulating system and the import of described SCR reactor.
Further, also comprise for ammonia system, the described spray ammonia for ammonia system controls the import department that mouth is fixed on described SCR reactor, for spraying ammonia in SCR reactor.
Further, also comprise cooling and dedusting system, described cooling and dedusting system is connected on the flue gas outlet pipe of described SCR reactor.Dust removal process is carried out to the flue gas that regeneration ending after-blow scans out.
Further, auxiliary air entrance is offered in described smoke inlet pipe road.For ensureing the normal circulation of heat smoke in SCR reactor to auxiliary air in SCR reactor.Particularly, described auxiliary air entrance is connected on compressed air cylinder by pipeline, and on pipeline, connect supply valve, controls air supply amount.
Further, described SCR reactor internal fixtion installs N layer low-temperature SCR catalyst bed, and described flying dust purging system connects N cover and purges end, and described purging end correspondence is fixed on above every layer of low-temperature SCR catalyst bed; Wherein, N gets positive integer.
Further, described SCR catalyst adopts honeycomb-shaped SCR catalyst, the air-out direction of purging end of described flying dust purging system and the axial consistent of the honeycomb hole of SCR catalyst.For removing the flying dust had in catalyst surface and duct.
Low-temperature SCR catalyst on-line regeneration facility of the present utility model has following beneficial effect:
(1) the utility model falls sulfate by first hyperthermic treatment, afterwards by purging the residual Si O disposing surface
2, the low-temperature catalyzed regeneration treatment effect of serious SCR is blocked obviously for dust stratification, sulfate in glass industry Industrial Boiler, and catalyst does not need dismounting can carry out regeneration process, simplifies regeneration flow process.
(2) smoke circulating system has been set up in the utility model, make the heat smoke circulation in SCR reactor, ensure that the homogeneous temperature of SCR inside reactor heat smoke is stablized, ensure that the sulfate of low-temperature SCR catalytic surface can be warmed equably and dispose.
(3) the utility model sprays into ammonia in SCR reactor, and the cooling dust remover accessed below, can treatment S O effectively
2and reclaim sulfuric acid salt and the SiO purged
2, promote recycling of resource.
(4) flue gas heating system in the utility model, flying dust purging system and for ammonia system natural gas, compressed air and ammonia etc., be all the conventional gas of industry, easily obtain, greatly reduce the maintenance cost of enterprise's SCR denitration.
(5) low-temperature SCR catalyst on-line regeneration facility of the present utility model can not need again to carry out in-situ heat regeneration when dismounting catalyst, coordinates the original position after regeneration to purge SiO
2, greatly simplify regeneration step, improve regeneration efficiency, effectively save the use cost of low-temperature SCR catalyst user.
(6) the utility model is applicable to adopt low-temperature SCR technique to carry out on industrial pot (kiln) furnace apparatus of denitration, especially glass cellar for storing things.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of low-temperature SCR catalyst on-line regeneration facility of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present utility model, be clearly and completely described the technical solution of the utility model, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
According to Fig. 1, low-temperature SCR catalyst on-line regeneration facility of the present utility model is described, comprise SCR reactor 1, described SCR reactor 1 is the reactor of inner fixed installation three layers of honeycomb fashion low-temperature SCR catalyst bed, after being installed on the cleaner (not shown) of glass furnace.The import 101 of described SCR reactor 1 connects smoke inlet pipe road 11, and outlet 102 connects flue gas outlet pipe 12; Smoke inlet pipe road 11 is connected with the outlet of the cleaner of glass furnace.Meanwhile, described smoke inlet pipe road 11 connects total air intake valve 111, described flue gas outlet pipe 12 connects valve 121 of always giving vent to anger, to control flue gas.
Also comprise, flue gas heating system 2 and flying dust purging system 3, on the fire end access smoke inlet pipe road 11 of described flue gas heating system 2, for giving flue gas; The purging end 31 of described flying dust purging system 3 is fixed on above the SCR catalyst of SCR reactor 1 inside.Described flue gas heating system 2 comprises combustion furnace 21, and the port of described combustion furnace 21 is fixed in smoke inlet pipe road 11.Wherein, use Small Combustion machine to add flue gas in combustion furnace 21, fuel adopts natural gas, and gas source 22, is easy to get as shown in fig. 1, and cost is low.The SCR reactor of corresponding three layers of honeycomb fashion low-temperature SCR catalyst bed, described flying dust purging system 3 has 3 covers and purges end 31, described purging end 31 is separately fixed at the top of every layer of SCR catalyst bed, and control the axial consistent of the described air-out direction of purging end 31 and the honeycomb hole of SCR catalyst, ensure to remove the flying dust had in catalyst surface and duct.Flying dust purging system 3 adopts compressed air cylinder 32 to provide compressed air to realize purging function, and compressed air is easy to get, and cost is low.
Low-temperature SCR catalyst on-line regeneration facility of the present utility model, when carrying out regeneration process, flue gas heating system 2 provides heat smoke, open gas source 22, start combustor ignition combustion stove 21, start to add heat smoke, control the heat smoke temperature of heating between 300-350 DEG C, to SCR catalyst heating 24-36h, ammonium sulfate heat resolve is fallen, online in-situ heat regeneration.Afterwards, open flying dust purging system 3 and purge the residual Si O disposing surface
2, greatly simplify regeneration step, improve regeneration efficiency, effectively save the use cost of low-temperature SCR catalyst user.
In order to accurately control the temperature entering flue gas in SCR reactor in time, the utility model has set up temperature control system (not shown), the temperature monitoring end of described temperature control system is fixed on the import department of described SCR reactor 1, and output is connected with the control end of described flue gas heating system 2; When the temperature that temperature monitoring end monitors the heat smoke of SCR reactor 1 import department is higher than setting value, output controls flue gas heating system 2 and stops heating; When the temperature that temperature monitoring end monitors the heat smoke of SCR reactor 1 import department is lower than setting value, output controls flue gas heating system 2 and starts heating.Based Intelligent Control enters the temperature of SCR reactor 1 internal heat flue gas.
If heat smoke does not flow, the non-uniform temperature of heat smoke in SCR reactor can be caused, therefore, in order to ensure that the homogeneous temperature of heat smoke in SCR reactor is stablized, low-temperature SCR catalyst on-line regeneration facility of the present utility model also comprises smoke circulating system 4, described smoke circulating system 4 comprises circulation air-introduced machine 41, air intake valve 42 and air-out valve 43, on flue gas outlet pipe 12 between entrance access described always give vent to anger valve 121 and the described SCR reactor 1 of described circulation air-introduced machine 41 export, the pipeline of connection is arranged air intake valve 42; On smoke inlet pipe road 11 between the outlet described total air intake valve 111 of access of described circulation air-introduced machine 41 and the import of described SCR reactor 1, the pipeline of connection sets out air valve 43.Namely the export and import of SCR reactor 1 is communicated with by the entrance and exit of described smoke circulating system 4 respectively, realizes the circulation of heat smoke in SCR reactor 1 after the heating of described flue gas heating system 2.In the regenerative process of low-temperature SCR catalyst, ensure that the homogeneous temperature of SCR reactor 1 internal heat flue gas is stablized.
Further, auxiliary air entrance 7 is offered in the smoke inlet pipe road 11 between total air intake valve 111 and described SCR reactor.Described auxiliary air entrance 7 is connected in compressed air cylinder (not shown) by pipeline, and on pipeline, connect supply valve 71, the air supply amount in control SCR reactor.Compressed air cylinder herein can share with the compressed air cylinder 32 adopted in flying dust purging system 3.
For SO
2sCR reactor after the fume treatment that content is higher, low-temperature SCR catalyst on-line regeneration facility of the present utility model also comprises for ammonia system 5, the described spray ammonia for ammonia system 5 controls the import department that mouth 51 is fixed on described SCR reactor 1, for spraying ammonia in SCR reactor.Spray ammonia controls mouth 51 can regulate ammonia spraying amount.Adopt industrial liquid ammonia tank 52 as ammonia source for ammonia system 5, be easy to get, cost is low.
Further, also comprise cooling and dedusting system 6, concrete employing cooling dust remover 6.Described cooling and dedusting system 6 is connected on the flue gas outlet pipe 12 of described SCR reactor 1, effectively reclaims ammonia and SO
2the sulfate that reaction generates and the SiO purged
2, promote recycling of resource.
The regenerative operation of the low-temperature SCR catalyst on-line regeneration facility of preferred technical scheme of the present utility model, specific as follows:
(1) first, open gas source 22 and supply valve 71, start combustion furnace 21, start to add heat smoke, after 30min, open air intake valve 42 and air-out valve 43, then start circulation air-introduced machine 41, close total air intake valve 111, always giving vent to anger, valve 121 adjusts to 1/4 state, only allow small part flue gas enter and circulate, and start cooling and dedusting system 6.
(2) when import department's flue-gas temperature of SCR reactor reaches 300 DEG C, open the valve of the ammonia tank 52 for ammonia system 5, start spray ammonia and control mouth 51, spray liquefied ammonia, the utility model regenerating unit operates 24h in this case, and the tolerance of the air filled into by supply valve 71 adjustment is unanimous on the whole with the gas output at valve 121 place of always giving vent to anger.
(3) temperature of the flue gas of the import department of the temperature monitoring end Real-Time Monitoring SCR reactor of temperature control system, ensure that the temperature entering the flue gas of SCR reactor is in the scope of setting, such as, between 300-350 DEG C, when the flue-gas temperature of import department is higher than 350 DEG C, output controls flue gas heating system 2 and stops heating, namely stops combustion furnace 21 to burn; When the temperature that temperature monitoring end monitors the heat smoke at SCR Reactor inlet place is lower than 300 DEG C, output controls flue gas heating system 2 and starts heating.Based Intelligent Control enters the temperature of SCR inside reactor heat smoke between 300-350 DEG C.
(4) after 24h hour, close the valve of combustion furnace 21 and natural gas 22, always giving vent to anger, valve 121 adjusts to full open state, and adjusts the amount of opening of supply valve 71, improves the supply tolerance of air, whole system cooling 1h.Afterwards, air intake valve 42 and the air-out valve 43 of closed loop air-introduced machine 41 and both sides is closed.The valve of the compressed air cylinder 32 of the flying dust purging system 3 opened, starts flying dust purging system 3, purges catalyst 2h.
(5) close flying dust purging system 3 and cooling dust remover 6, the valve of closes compression air tank 32, opens total air intake valve 111, SCR reactor and enters using state, regenerate complete.
The above; be only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.
Claims (10)
1. low-temperature SCR catalyst on-line regeneration facility, comprises SCR reactor, and the import of SCR reactor connects smoke inlet pipe road, and outlet connects flue gas outlet pipe; It is characterized in that: also comprise flue gas heating system and flying dust purging system, on the fire end access smoke inlet pipe road of described flue gas heating system, for giving flue gas; The purging end of described flying dust purging system is fixed on above the SCR catalyst of SCR inside reactor.
2. low-temperature SCR catalyst on-line regeneration facility according to claim 1, it is characterized in that: also comprise temperature control system, the temperature monitoring end of described temperature control system is fixed on the import department of described SCR reactor, and output is connected with the control end of described flue gas heating system; When the temperature that temperature monitoring end monitors the heat smoke of the import department of SCR reactor is higher than setting value, output controls flue gas heating system and stops heating; When the temperature that temperature monitoring end monitors the heat smoke of the import department of SCR reactor is lower than setting value, output controls flue gas heating system and starts heating.
3. low-temperature SCR catalyst on-line regeneration facility according to claim 1 and 2, it is characterized in that: also comprise smoke circulating system, the export and import of SCR reactor is communicated with by the entrance and exit of described smoke circulating system respectively, realizes the circulation of heat smoke in SCR reactor after the heating of described flue gas heating system.
4. low-temperature SCR catalyst on-line regeneration facility according to claim 3, it is characterized in that: described smoke circulating system comprises circulation air-introduced machine, air intake valve and air-out valve, the entrance of described circulation air-introduced machine is connected with the outlet of described SCR reactor, the pipeline of connection is arranged air intake valve; The outlet of described circulation air-introduced machine is connected with the import of described SCR reactor, and the pipeline of connection sets out air valve.
5. low-temperature SCR catalyst on-line regeneration facility according to claim 3, is characterized in that: described smoke inlet pipe road connects total air intake valve, and described flue gas outlet pipe connects valve of always giving vent to anger; On flue gas outlet pipe between the outlet of entrance access described always give vent to anger valve and the described SCR reactor of described smoke circulating system; On smoke inlet pipe road between the outlet described total air intake valve of access of described smoke circulating system and the import of described SCR reactor.
6. the low-temperature SCR catalyst on-line regeneration facility according to claim 1,2,4 or 5, it is characterized in that: also comprise for ammonia system, the described spray ammonia for ammonia system controls the import department that mouth is fixed on described SCR reactor, for spraying ammonia in SCR reactor.
7. low-temperature SCR catalyst on-line regeneration facility according to claim 6, is characterized in that: also comprise cooling and dedusting system, described cooling and dedusting system is connected on the flue gas outlet pipe of described SCR reactor.
8. the low-temperature SCR catalyst on-line regeneration facility according to claim 1,2,4,5 or 7, it is characterized in that: described SCR reactor internal fixtion installs N layer low-temperature SCR catalyst bed, described flying dust purging system connects N cover and purges end, and described purging end correspondence is fixed on above every layer of low-temperature SCR catalyst bed; Wherein, N gets positive integer.
9. low-temperature SCR catalyst on-line regeneration facility according to claim 8, is characterized in that: described SCR catalyst adopts honeycomb-shaped SCR catalyst, the air-out direction of purging end of described flying dust purging system and the axial consistent of the honeycomb hole of SCR catalyst.
10. the low-temperature SCR catalyst on-line regeneration facility according to claim 1,2,4,5,7 or 9, is characterized in that: on described smoke inlet pipe road, offer auxiliary air entrance.
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| CN201520696940.9U CN204973600U (en) | 2015-09-09 | 2015-09-09 | Low temperature SCR catalyst on -line regeneration device |
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| CN201520696940.9U CN204973600U (en) | 2015-09-09 | 2015-09-09 | Low temperature SCR catalyst on -line regeneration device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327856A (en) * | 2017-05-25 | 2017-11-07 | 四川亚联高科技股份有限公司 | One kind catalysis combustion heat supplying system and heating technique |
| CN107649186A (en) * | 2017-11-14 | 2018-02-02 | 上海泰欣环境工程股份有限公司 | A kind of SCR denitration on-line regeneration technology |
| CN107890884A (en) * | 2017-12-31 | 2018-04-10 | 上海康恒环境股份有限公司 | A kind of SCR catalyst situ regeneration device applied to consumer waste incineration |
| CN107913598A (en) * | 2018-01-03 | 2018-04-17 | 上海市环境工程设计科学研究院有限公司 | A kind of municipal solid waste incinerator SCR low-temperature denitration catalyst on-line regeneration systems and its renovation process |
| CN109847583A (en) * | 2019-04-01 | 2019-06-07 | 浙江深度能源技术有限公司 | A kind of catalyst situ regeneration device and its application method |
| CN110252420A (en) * | 2019-07-09 | 2019-09-20 | 河北工业大学 | It is a kind of be poisoned honeycomb catalyst regeneration method and it is a kind of be poisoned honeycomb catalyst regenerating unit |
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2015
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327856A (en) * | 2017-05-25 | 2017-11-07 | 四川亚联高科技股份有限公司 | One kind catalysis combustion heat supplying system and heating technique |
| CN107649186A (en) * | 2017-11-14 | 2018-02-02 | 上海泰欣环境工程股份有限公司 | A kind of SCR denitration on-line regeneration technology |
| CN107890884A (en) * | 2017-12-31 | 2018-04-10 | 上海康恒环境股份有限公司 | A kind of SCR catalyst situ regeneration device applied to consumer waste incineration |
| CN107913598A (en) * | 2018-01-03 | 2018-04-17 | 上海市环境工程设计科学研究院有限公司 | A kind of municipal solid waste incinerator SCR low-temperature denitration catalyst on-line regeneration systems and its renovation process |
| CN107913598B (en) * | 2018-01-03 | 2023-10-13 | 上海市环境工程设计科学研究院有限公司 | Online regeneration system and regeneration method of SCR low-temperature denitration catalyst in household garbage incineration plant |
| CN109847583A (en) * | 2019-04-01 | 2019-06-07 | 浙江深度能源技术有限公司 | A kind of catalyst situ regeneration device and its application method |
| CN110252420A (en) * | 2019-07-09 | 2019-09-20 | 河北工业大学 | It is a kind of be poisoned honeycomb catalyst regeneration method and it is a kind of be poisoned honeycomb catalyst regenerating unit |
| CN110252420B (en) * | 2019-07-09 | 2022-01-18 | 河北工业大学 | Method and device for regenerating poisoned honeycomb catalyst |
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