CN104028315A - Regeneration method of sulfur-poisoned selective catalytic reduction (SCR) denitrification catalyst - Google Patents
Regeneration method of sulfur-poisoned selective catalytic reduction (SCR) denitrification catalyst Download PDFInfo
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- CN104028315A CN104028315A CN201410238888.2A CN201410238888A CN104028315A CN 104028315 A CN104028315 A CN 104028315A CN 201410238888 A CN201410238888 A CN 201410238888A CN 104028315 A CN104028315 A CN 104028315A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 64
- 238000011069 regeneration method Methods 0.000 title claims abstract description 17
- 238000010531 catalytic reduction reaction Methods 0.000 title claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000008929 regeneration Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 11
- 231100000572 poisoning Toxicity 0.000 claims abstract description 11
- 230000000607 poisoning effect Effects 0.000 claims abstract description 11
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims abstract description 10
- 239000011609 ammonium molybdate Substances 0.000 claims abstract description 10
- 229940010552 ammonium molybdate Drugs 0.000 claims abstract description 10
- 235000018660 ammonium molybdate Nutrition 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 239000011593 sulfur Substances 0.000 claims abstract description 10
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 9
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims abstract description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 238000009418 renovation Methods 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- -1 alkyl phenol Chemical compound 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000001771 impaired effect Effects 0.000 claims description 3
- 230000002779 inactivation Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000013517 stratification Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 208000008316 Arsenic Poisoning Diseases 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 208000005374 Poisoning Diseases 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000009849 deactivation Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- WKXHZKXPFJNBIY-UHFFFAOYSA-N titanium tungsten vanadium Chemical compound [Ti][W][V] WKXHZKXPFJNBIY-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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Abstract
The invention discloses a regeneration method of a sulfur-poisoned selective catalytic reduction (SCR) denitrification catalyst. The main process flows include mechanical deashing, cleaning in an alkaline cleaning solution, impregnating in a regeneration solution and drying, wherein the alkaline cleaning solution is a mixed solution of strong alkali and weak acid salts and a surfactant; the acidic regeneration solution is formed by ammonium salts, weak acids, ammonium metavanadate and ammonium molybdate. The regeneration method has the beneficial effects that after the sulfur-poisoned SCR denitrification catalyst is regenerated by the method, basically the sulfur component can be removed, the catalyst has certain sulfur poisoning resisting capability and has the denitrification rate of 81-88%, and meanwhile, the compressive strength and wear strength of the catalyst can be maintained; besides, the used regeneration process flows are relatively simple, are high in treatment efficiency and are suitable for large-scale industrial production.
Description
Technical field
The present invention relates to SCR (SCR) denitrating catalyst field, be specifically related to a kind of renovation process of sulfur poisoning denitrifying catalyst with selective catalytic reduction.
Background technology
Nitrogen oxide is one of main atmosphere pollution, and coal-fired power plant is one of main emission source of nitrogen oxide.Along with promulgation and the enforcement of a series of environmental protection policies of China, SCR method gas denitrifying technology is just progressively applied in coal-burning power plant of China.By the end of the year 2012, the coal steam-electric plant smoke denitration unit total capacity that put into operation exceedes 2.3 hundred million kW, accounts for 28% of national active service fired power generating unit capacity, has improved 10% than 2011; In 2013, the newly-increased thermoelectricity denitration installed capacity in the whole nation was 1.3 times of " 12 " the first two years total amount.SCR denitrating catalyst is active can decline gradually in use, when its activity drops to can not meet the requiring of " fossil-fuel power plant atmospheric pollutant emission standard " time, just need to change, its replacement cycle is generally 3 years, and renewal cost accounts for 50% of SCR system total price.SCR catalyst to inactivation is regenerated, and can improve or recover its activity, reaches the object of re-using.Regeneration expense only accounts for 30% of whole replacing catalyst costs, and has saved the cost of processing spent catalyst, and therefore, the regeneration of SCR catalyst has very important economic benefit and environmental benefit.
Sulfur poisoning is one of common cause causing catalysqt deactivation.The compound that causes the sulphur of catalyst poisoning generally presents acidity, adopts Alkaline pretreatment just can reach good effect.
On this basis, this patent has proposed a kind of renovation process of the new SCR denitrating catalyst for sulfur poisoning.The method can simplification of flowsheet, reduces production costs and reduces the pollution of regenerative process to environment, also can make the catalyst after regeneration still have higher intensity and longer service life, is therefore more conducive to large-scale industrial production.
Summary of the invention
The object of this invention is to provide a kind of SCR denitrating catalyst renovation process of new sulfur poisoning, can utilize succinct mode efficiently to remove the sulphur component that causes catalyst poisoning, supplement impaired active component simultaneously, make catalyst recover its higher denitration activity, have certain anti-arsenic poisoning ability simultaneously.
For achieving the above object, the present invention is by the following technical solutions:
A renovation process for the SCR denitrating catalyst of sulfur poisoning, comprises the following steps:
(1) with 3-4Mpa, flow 0.5～1.0m
3the clean dried compressed air of/s purges the SCR denitrating catalyst of inactivation, and to remove surperficial dust stratification, the time is 10～20min;
(2) grey catalyst after treatment be will blow and the ultrasonic auxiliary cleaning of alkaline cleaning fluid, time 20～60min, ultrasonic power 100～500w will be placed in;
(3) clean by rinsed with deionized water;
(4) by catalyst soakage in regenerated liquid, remove residual sulphur composition, simultaneously supplement impaired active component, dip time 1～4h;
(5) by catalyst dry 1～3h at 110-120 DEG C, then roasting 2～5h at 400-410 DEG C, obtains the SCR denitrating catalyst after regeneration.
Wherein, described alkaline cleaning fluid is the mixed solution of strong base-weak acid salt and surfactant, and strong base-weak acid salt is one or more of sodium carbonate, sodium acetate, sodium sulfite or sodium metasilicate, and concentration is 0.1～2mol/L; Surfactant is one or more of paregal O (AEO), micropore permeation agent JFC or alkyl phenol polyoxy ether (OP～(n), n=10), and content is 0.2～1wt%; Surplus is deionized water.
Wherein, described regenerated liquid consist of ammonium salt, weak acid, ammonium metavanadate and ammonium molybdate, ammonium salt is one or both of ammonium chloride or ammonium nitrate, concentration is 0.1～2mol/L; Weak acid is one or more of oxalic acid, acetic acid or citric acid, and content is 0.1～1wt%; Ammonium metavanadate content is 0.5～4wt%; Ammonium molybdate content is 1～6wt%; Surplus is deionized water.
Beneficial effect:
The beneficial effect of the renovation process of sulfur poisoning SCR denitrating catalyst of the present invention is:
(1) the present invention's cleaning fluid used presents alkalescent, can, except in desulfuration composition, farthest keep compression strength, tear strength and the active component of catalyst; In cleaning fluid, add surfactant, and adopted ultrasonic auxiliary cleaning, improved greatly cleaning efficiency;
(2) ammonium salt containing in regenerated liquid of the present invention and weak acid can further be removed residual a small amount of sulphur component, reach the object purifying completely; Regenerated liquid can be also catalyst make-up active component, and its denitration activity is further enhanced; The ammonium molybdate adding can make the catalyst after regeneration obtain certain anti-arsenic poisoning ability.
(3) to using the SCR denitrating catalyst after this method regeneration to carry out denitration activity detection, find that its denitration rate can reach 81～88%.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is elaborated, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Embodiment 1
(1) solution preparation
Cleaning fluid: 0.8mol/L sodium carbonate, 0.3wt% paregal O;
Regenerated liquid: 1mol/L ammonium chloride, 0.6wt% oxalic acid, 2wt% ammonium metavanadate, 4wt% ammonium molybdate.
(2) technological process
Institute's sample thief be certain power plant to have moved the vanadium tungsten titanium of 23000 hours be denitrating catalyst, find that after testing denitration rate is 53%, deactivation cause is serious arsenic poisoning.First, utilize 3Mpa, flow 0.5m
3the Compressed Gas of/s purges 10min to the denitrification catalyst module of arsenic poisoning; Secondly, insert ultrasonic auxiliary cleaning 30min in cleaning fluid by purging complete catalyst, utilize deionized water to carry out rinsing; Then, by catalyst soakage after treatment 3h in regenerated liquid; Finally, utilize the hot-air of 120 DEG C to be dried 2h to catalyst.SCR denitrating catalyst regenerative process finishes.
Catalyst after regeneration is carried out to denitration activity test, find that its denitration rate returns to 88% by 53%.
Embodiment 2
(1) solution preparation
Cleaning fluid: 0.5mol/L sodium carbonate, 0.3wt% paregal O;
Regenerated liquid: 1mol/L ammonium chloride, 0.6wt% oxalic acid, 2wt% ammonium metavanadate, 4wt% ammonium molybdate.
(2) technological process
Institute's sample thief be certain power plant to have moved the vanadium tungsten titanium of 23000 hours be denitrating catalyst, find that after testing denitration rate is 53%, deactivation cause is serious arsenic poisoning.First, utilize 3Mpa, flow 0.5m
3the Compressed Gas of/s purges 10min to the denitrification catalyst module of arsenic poisoning; Secondly, insert ultrasonic auxiliary cleaning 30min in cleaning fluid by purging complete catalyst, utilize deionized water to carry out rinsing; Then, by catalyst soakage after treatment 3h in regenerated liquid; Finally, utilize the hot-air of 120 DEG C to be dried 2h to catalyst.SCR denitrating catalyst regenerative process finishes.
Catalyst after regeneration is carried out to denitration activity test, find that its denitration rate returns to 82% by 53%.
Embodiment 3
(1) solution preparation
Cleaning fluid: 0.8mol/L sodium acetate, 0.3wt% micropore permeation agent JFC;
Regenerated liquid: 1mol/L ammonium chloride, 1wt% acetic acid, 2wt% ammonium metavanadate, 4wt% ammonium molybdate.
(2) technological process
Institute's sample thief be certain power plant to have moved the vanadium tungsten titanium of 23000 hours be denitrating catalyst, find that after testing denitration rate is 53%, deactivation cause is serious arsenic poisoning.First, utilize 3Mpa, flow 0.5m
3the Compressed Gas of/s purges 10min to the denitrification catalyst module of arsenic poisoning; Secondly, insert ultrasonic auxiliary cleaning 30min in cleaning fluid by purging complete catalyst, utilize deionized water to carry out rinsing; Then, by catalyst soakage after treatment 3h in regenerated liquid; Finally, utilize the hot-air of 120 DEG C to be dried 2h to catalyst.SCR denitrating catalyst regenerative process finishes.
Catalyst after regeneration is carried out to denitration activity test, find that its denitration rate returns to 85% by 53%.
Embodiment 4
(1) solution preparation
Cleaning fluid: 1mol/L sodium sulfite, 0.3wt% paregal O;
Regenerated liquid: 0.5mol/L ammonium nitrate, 0.6wt% oxalic acid, 2wt% ammonium metavanadate, 4wt% ammonium molybdate.
(2) technological process
Institute's sample thief be certain power plant to have moved the vanadium tungsten titanium of 23000 hours be denitrating catalyst, find that after testing denitration rate is 53%, deactivation cause is serious arsenic poisoning.First, utilize 3Mpa, flow 0.5m
3the Compressed Gas of/s purges 10min to the denitrification catalyst module of arsenic poisoning; Secondly, insert ultrasonic auxiliary cleaning 30min in cleaning fluid by purging complete catalyst, utilize deionized water to carry out rinsing; Then, by catalyst soakage after treatment 3h in regenerated liquid; Finally, utilize the hot-air of 120 DEG C to be dried 2h to catalyst.SCR denitrating catalyst regenerative process finishes.
Catalyst after regeneration is carried out to denitration activity test, find that its denitration rate returns to 82% by 53%.
Finally it should be noted that: obviously, above-described embodiment is only for example of the present invention is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being amplified out thus or variation are still among protection scope of the present invention.
Claims (1)
1. a renovation process for sulfur poisoning denitrifying catalyst with selective catalytic reduction, is characterized in that, comprises the following steps:
(1) with 3-4Mpa, flow 0.5～1.0m
3the clean dried compressed air of/s purges the SCR denitrating catalyst of inactivation, and to remove surperficial dust stratification, the time is 10～20min;
(2) grey catalyst after treatment be will blow and the ultrasonic auxiliary cleaning of alkaline cleaning fluid, time 20～60min, ultrasonic power 100～500w will be placed in;
(3) clean by rinsed with deionized water;
(4) by catalyst soakage in regenerated liquid, remove residual sulphur composition, simultaneously supplement impaired active component, dip time 1～4h;
(5) by catalyst dry 1～3h at 110-120 DEG C, then roasting 2～5h at 400-410 DEG C, obtains the SCR denitrating catalyst after regeneration.
Described alkaline cleaning fluid is the mixed solution of strong base-weak acid salt and surfactant, and strong base-weak acid salt is one or more of sodium carbonate, sodium acetate, sodium sulfite or sodium metasilicate, and concentration is 0.1～2mol/L; Surfactant adds O for flat, i.e. AEO, micropore permeation agent JFC or alkyl phenol polyoxy ether, and wherein OP～(n), and one or more of n=10, content is 0.2～1wt%.
Described regenerated liquid consist of ammonium salt, weak acid, ammonium metavanadate and ammonium molybdate, ammonium salt is one or both of ammonium chloride or ammonium nitrate, concentration is 0.1～2mol/L; Weak acid is one or more of oxalic acid, acetic acid or citric acid, and content is 0.1～1wt%; Ammonium metavanadate content is 0.5～4wt%; Ammonium molybdate content is 1～6wt%; Surplus is deionized water.
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| CN201410238888.2A CN104028315A (en) | 2014-06-03 | 2014-06-03 | Regeneration method of sulfur-poisoned selective catalytic reduction (SCR) denitrification catalyst |
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| CN201410238888.2A CN104028315A (en) | 2014-06-03 | 2014-06-03 | Regeneration method of sulfur-poisoned selective catalytic reduction (SCR) denitrification catalyst |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413760A (en) * | 2014-09-12 | 2016-03-23 | 神华集团有限责任公司 | Composition for cleaning liquid, and applications thereof, and failure SCR catalyst activity recovery method |
| CN105879930A (en) * | 2016-04-08 | 2016-08-24 | 天河（保定）环境工程有限公司 | Abandoned denitration catalyst recycling alkaline-washing solution and method |
| CN106345539A (en) * | 2016-07-27 | 2017-01-25 | 北京纬纶华业环保科技股份有限公司 | Regeneration method of catalyst |
| CN106607106A (en) * | 2015-10-26 | 2017-05-03 | 浙江浙能技术研究院有限公司 | Activity regenerating and performance optimizing method of SCR catalyst for sulfur, arsenic and phosphorus poisoning |
| CN107442135A (en) * | 2017-08-25 | 2017-12-08 | 华北电力大学 | A kind of renovation process of arsenic poisoning SCR denitration |
| CN107497299A (en) * | 2017-10-13 | 2017-12-22 | 合肥工业大学 | A kind of MnOx/ PG denitrating catalyst spent regeneration methods |
| CN114308140A (en) * | 2021-12-07 | 2022-04-12 | 苏州西热节能环保技术有限公司 | Catalyst regeneration method based on ammonium bisulfate poisoning |
| CN116603575A (en) * | 2023-05-19 | 2023-08-18 | 浙江工业大学 | A kind of regeneration method of arsenic poisoning SCR denitrification catalyst |
| CN118371275A (en) * | 2024-06-24 | 2024-07-23 | 潍柴动力股份有限公司 | Method for regenerating post-treatment catalyst in failure mode |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413760A (en) * | 2014-09-12 | 2016-03-23 | 神华集团有限责任公司 | Composition for cleaning liquid, and applications thereof, and failure SCR catalyst activity recovery method |
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| CN106607106A (en) * | 2015-10-26 | 2017-05-03 | 浙江浙能技术研究院有限公司 | Activity regenerating and performance optimizing method of SCR catalyst for sulfur, arsenic and phosphorus poisoning |
| CN105879930A (en) * | 2016-04-08 | 2016-08-24 | 天河（保定）环境工程有限公司 | Abandoned denitration catalyst recycling alkaline-washing solution and method |
| CN106345539A (en) * | 2016-07-27 | 2017-01-25 | 北京纬纶华业环保科技股份有限公司 | Regeneration method of catalyst |
| CN107442135A (en) * | 2017-08-25 | 2017-12-08 | 华北电力大学 | A kind of renovation process of arsenic poisoning SCR denitration |
| CN107442135B (en) * | 2017-08-25 | 2020-04-21 | 华北电力大学 | A kind of regeneration method of arsenic poisoning SCR denitration catalyst |
| CN107497299A (en) * | 2017-10-13 | 2017-12-22 | 合肥工业大学 | A kind of MnOx/ PG denitrating catalyst spent regeneration methods |
| CN107497299B (en) * | 2017-10-13 | 2020-10-16 | 合肥工业大学 | A kind of MnOx/PG denitration catalyst failure regeneration method |
| CN114308140A (en) * | 2021-12-07 | 2022-04-12 | 苏州西热节能环保技术有限公司 | Catalyst regeneration method based on ammonium bisulfate poisoning |
| CN116603575A (en) * | 2023-05-19 | 2023-08-18 | 浙江工业大学 | A kind of regeneration method of arsenic poisoning SCR denitrification catalyst |
| CN118371275A (en) * | 2024-06-24 | 2024-07-23 | 潍柴动力股份有限公司 | Method for regenerating post-treatment catalyst in failure mode |
| CN118371275B (en) * | 2024-06-24 | 2024-10-22 | 潍柴动力股份有限公司 | A method for regenerating a post-processing catalyst |
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Application publication date: 20140910 |