CN103878035A - Regenerated liquid of vanadium and titanium-based selective catalytic reduction (SCR) denitration catalyst - Google Patents
Regenerated liquid of vanadium and titanium-based selective catalytic reduction (SCR) denitration catalyst Download PDFInfo
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- CN103878035A CN103878035A CN201410128342.1A CN201410128342A CN103878035A CN 103878035 A CN103878035 A CN 103878035A CN 201410128342 A CN201410128342 A CN 201410128342A CN 103878035 A CN103878035 A CN 103878035A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 72
- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 20
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000010936 titanium Substances 0.000 title claims abstract description 19
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 19
- 238000010531 catalytic reduction reaction Methods 0.000 title claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 36
- 239000008367 deionised water Substances 0.000 claims abstract description 32
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000000694 effects Effects 0.000 claims abstract description 25
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims abstract description 14
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 24
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 235000006408 oxalic acid Nutrition 0.000 claims description 9
- 239000013589 supplement Substances 0.000 claims description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 4
- 229940120146 EDTMP Drugs 0.000 claims description 4
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 4
- MSXHSNHNTORCAW-GGLLEASOSA-M sodium;(2s,3s,4s,5r,6s)-3,4,5,6-tetrahydroxyoxane-2-carboxylate Chemical compound [Na+].O[C@H]1O[C@H](C([O-])=O)[C@@H](O)[C@H](O)[C@H]1O MSXHSNHNTORCAW-GGLLEASOSA-M 0.000 claims description 4
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 239000000126 substance Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 230000002411 adverse Effects 0.000 abstract 1
- 230000037361 pathway Effects 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 description 11
- 238000011069 regeneration method Methods 0.000 description 11
- 230000002779 inactivation Effects 0.000 description 9
- 239000002585 base Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- CEYULKASIQJZGP-UHFFFAOYSA-L disodium;2-(carboxymethyl)-2-hydroxybutanedioate Chemical compound [Na+].[Na+].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O CEYULKASIQJZGP-UHFFFAOYSA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Catalysts (AREA)
Abstract
The invention discloses a regenerated liquid of a vanadium and titanium-based selective catalytic reduction (SCR) denitration catalyst. The regenerated liquid comprises a cleaning liquid and an active replenishing liquid, wherein the cleaning liquid consists of alkaline organic salt, a surfactant and deionized water; the active replenishing liquid consists of weak acid, ammonium metavanadate, ammonium tungstate, cerous nitrate and deionized water. The cleaning liquid ingredient in the denitration catalyst regenerated liquid provided by the invention can eliminate adverse effects of harmful substances to the SCR denitration catalyst, and recover the pore pathway structure; the active replenishing liquid ingredient can improve the activity of the denitration catalyst, increase the thermal stability of the catalyst, and prolong the service life of the catalyst; the denitration ratio of the regenerated catalyst can reach 82%-90%; the SO2/SO3 conversion rate is less than 1%; the service life of the regenerated liquid is mo than 85% of that of a fresh catalyst.
Description
Technical field
The present invention relates to denitrifying catalyst with selective catalytic reduction field, be specifically related to a kind of vanadium of inactivation, the regenerated liquid of titanium based selective catalytic-reduction denitrified catalyst.
Background technology
Along with country is more and more stricter to the control of discharged nitrous oxides, SCR (SCR) gas denitrifying technology is because of the denitrating system that it is efficient and denitration performance is widely used in thermal power plant reliably.The technological core of SCR flue-gas denitration process is vanadium, Ti-base catalyst, exists the active problem declining in running.Cause the reason of catalysqt deactivation to have a lot, the impact of existing operating condition, such as the dust in flue gas and temperature fluctuation meeting cause damage to catalyst macrostructure, also have the toxic action of various poisonous and harmful chemical compositions to catalyst surface reaction active site in flue gas, the toxic action that wherein arsenic element, alkali metal, alkaline-earth metal and metal oxide have is the most obvious.
Catalyst regeneration has great economic benefit and social environment benefit.Denitrating catalyst is the important component part of the SCR of coal-burning power plant denitrating system, and cost is higher, and decaying catalyst regeneration expense is only 30～50% of raw catelyst.If do not regenerated, the useless processing of endangering that need to inject capital into, and will cause the serious waste of resource and the secondary pollution that brings environment.Can predict thus, the SCR denitrating catalyst regeneration of inactivation is inexorable trend.
The domestic research to denitrating catalyst regeneration has had many.In the Chinese invention patent application of publication number CN102974366, mentioned alkali cleaning and the supplementary mode of active liquid, but its alkali cleaning utilizes ammoniacal liquor to carry out, act on more singlely, treatment effeciency is lower, easily contaminated environment; Its active form of taking coating of supplementing is difficult to bring into play lasting effect in denitrating flue gas process.The Chinese invention patent application of publication number CN102764675 has also been used weak acid and surfactant to regenerate to decaying catalyst, and this regenerated liquid is not good for arsenic and phosphorus isogonic acidic materials fouled catalyst treatment effect; The EDTA adding can produce complexing to alkali and alkaline earth metal ions, but its dispersiveness is poor, need to add certain dispersant to use.In a word, the problems referred to above illustrate that the performance of the regenerated liquid of existing vanadium, titanium base SCR denitrating catalyst has much room for improvement, more thoroughly to remove the total material that causes inactivation, and retentive activity component and intensity simultaneously, be applicable to large-scale industrial production, and can prevent from causing environmental pollution.
Summary of the invention
The object of the invention is to for the problems referred to above, the regenerated liquid of a kind of vanadium, titanium based selective catalytic-reduction denitrified catalyst is provided.
For achieving the above object, the technical solution adopted in the present invention is:
The regenerated liquid of a kind of vanadium, titanium based selective catalytic-reduction denitrified catalyst, comprise cleaning fluid and the active liquid that supplements, described cleaning fluid is made up of alkaline organic salt, surfactant and deionized water, and described activity is supplemented liquid and is made up of weak acid, ammonium metavanadate, ammonium tungstate, cerous nitrate and deionized water.
Wherein, the alkaline organic salt in described cleaning fluid is the sodium salt of gluconic acid, citric acid or ethylene diamine tetra methylene phosphonic acid (EDTMPA) or one or more of sylvite, and content is 0.5～5wt%; Surfactant is one or more of alkali-resistant penetrant AEP98, alkali-resistant penetrant OEP-70 or micropore permeation agent JFC, and content is 0.1～1wt%; All the other content in described cleaning fluid are deionized water.
Wherein, the weak acid in the supplementary liquid of described activity is one or more of oxalic acid, acetic acid or citric acid, and content is 0.5～4wt%; Ammonium metavanadate content is 0.5～5wt%, and ammonium tungstate content is 2～6wt%, and cerous nitrate content is 0.05～1wt%; All the other content that described activity is supplemented in liquid are deionized water.
Further, preferred described cleaning fluid is made up of following component: 1～3wt% gluconic acid sodium salt, 0.2～0.4wt% micropore permeation agent JFC, 96.6～98.8wt% deionized water;
Further, the supplementary liquid of preferred described activity is made up of following component: 1～3wt% oxalic acid, 2～4wt% ammonium metavanadate, 3～5wt% ammonium tungstate, 0.2～0.4wt% cerous nitrate, 87.6～93.8wt% deionized water.
Beneficial effect:
The beneficial effect of the regenerated liquid of vanadium of the present invention, titanium based selective catalytic-reduction denitrified catalyst is:
(1) cleaning fluid main component of the present invention is alkaline organic salt, itself has very strong complexing power, dissolubility, soil release performance, especially very obvious for the treatment effect of alkaline-earth metal and molysite fouled catalyst; Its alkalescence a little less than, intensity and the active component of the rear catalyst that can keep to greatest extent regenerating; In cleaning fluid, add bleeding agent, improved the efficiency of cleaning;
(2) the supplementary liquid of weakly acidic activity can supplement impaired active component and active sites, improves denitration rate; The cerous nitrate wherein adding can increase heat endurance and the service life of regenerated catalyst;
(3) can reach 82～90%, SO2/SO3 conversion ratio through the denitration rate of catalyst of regeneration and be less than 1%, be fresh catalyst more than 85% service life, all meets engineering design requirement.
The specific embodiment
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) regenerated liquid preparation
Cleaning fluid: 2wt% gluconic acid sodium salt, 0.3wt% micropore permeation agent JFC, surplus is deionized water;
The active liquid that supplements: 0.8wt% oxalic acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and denitration rate returns to 90%, SO by 56%
2/ SO
3conversion ratio be 0.82%.
Embodiment 2
(1) regenerated liquid preparation
Cleaning fluid: 1wt% gluconic acid sodium salt, 0.3wt% micropore permeation agent JFC, surplus is deionized water;
The active liquid that supplements: 0.8wt% oxalic acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and denitration rate returns to 83%, SO by 56%
2/ SO
3conversion ratio be 0.78%.
Embodiment 3
(1) regenerated liquid preparation
Cleaning fluid: 4wt% K-IAO, 0.3wt% micropore permeation agent JFC, surplus is deionized water;
The active liquid that supplements: 0.8wt% oxalic acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and denitration rate is 0.85% by 56% conversion ratio that returns to 90%, SO2/SO3.
Embodiment 4
(1) regenerated liquid preparation
Cleaning fluid: 2wt% K-IAO, 0.3wt% alkali-resistant penetrant OEP-70, surplus is deionized water;
The active liquid that supplements: 0.8wt% oxalic acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and nitre rate is 0.81% by 56% conversion ratio that returns to 87%, SO2/SO3.
Embodiment 5
(1) regenerated liquid preparation
Cleaning fluid: 2wt% natrium citricum, 0.3wt% micropore permeation agent JFC, surplus is deionized water;
The active liquid that supplements: 0.8wt% oxalic acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and denitration rate returns to 85%, SO by 56%
2/ SO
3conversion ratio be 0.86%.
Embodiment 6
(1) regenerated liquid preparation
Cleaning fluid: 2wt% ethylene diamine tetra methylene phosphonic acid sodium, 0.5wt% alkali-resistant penetrant AEP98, surplus is deionized water;
The active liquid that supplements: 0.8wt% citric acid, 1wt% ammonium metavanadate, 3wt% ammonium tungstate, 0.3wt% cerous nitrate, surplus is deionized water.
(2) technological process
Institute's sample thief is vanadium, the titanium base SCR denitrating catalyst that certain power plant has moved 20000 hours, finds that after testing denitration rate is 56%, SO
2/ SO
3conversion ratio be 0.78%.First, utilize dried compressed air to purge 10min to the denitrating catalyst of inactivation, to remove surperficial dust stratification; Secondly, insert ultrasonic auxiliary cleaning 45min in cleaning fluid by blowing the catalyst that ash is disposed, after to put into deionized water rinsing clean; Then, catalyst soakage is supplemented to 3h in liquid in activity; Finally, utilize the hot-air of 120 ℃ to be dried 2h to catalyst.Regenerative process finishes.
Catalyst after regeneration is tested through denitration activity, and denitration rate returns to 82%, SO by 56%
2/ SO
3conversion ratio be 0.83%.
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 (5)
1. the regenerated liquid of a vanadium, titanium based selective catalytic-reduction denitrified catalyst, it is characterized in that: described regenerated liquid comprises cleaning fluid and the active liquid that supplements, described cleaning fluid is made up of alkaline organic salt, surfactant and deionized water, and described activity is supplemented liquid and is made up of weak acid, ammonium metavanadate, ammonium tungstate, cerous nitrate and deionized water.
2. the regenerated liquid of vanadium according to claim 1, titanium based denitration catalyst, it is characterized in that: the alkaline organic salt in described cleaning fluid is the sodium salt of gluconic acid, citric acid or ethylene diamine tetra methylene phosphonic acid or one or more of sylvite, and content is 0.5～5wt%; Surfactant is one or more of alkali-resistant penetrant AEP98, alkali-resistant penetrant OEP-70 or micropore permeation agent JFC, and content is 0.1～1wt%; All the other content in described cleaning fluid are deionized water.
3. the regenerated liquid of vanadium according to claim 1, titanium based denitration catalyst, is characterized in that: the weak acid in the supplementary liquid of described activity is one or more of oxalic acid, acetic acid or citric acid, and content is 0.5～4wt%; Ammonium metavanadate content is 0.5～5wt%, and ammonium tungstate content is 2～6wt%, and cerous nitrate content is 0.05～1wt%; All the other content that described activity is supplemented in liquid are deionized water.
4. the regenerated liquid of vanadium according to claim 2, titanium based denitration catalyst, is characterized in that: described cleaning fluid is made up of following component: 1～3wt% gluconic acid sodium salt, 0.2～0.4wt% micropore permeation agent JFC, 96.6～98.8wt% deionized water.
5. the regenerated liquid of vanadium according to claim 3, titanium based denitration catalyst, is characterized in that: described activity is supplemented liquid and is made up of following component: 1～3wt% oxalic acid, 2～4wt% ammonium metavanadate, 3～5wt% ammonium tungstate, 0.2～0.4wt% cerous nitrate, 87.6～93.8wt% deionized water.
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| CN201410128342.1A CN103878035B (en) | 2014-04-01 | 2014-04-01 | The regenerated liquid of a kind of vanadium, titanium based selective catalytic-reduction denitrified catalyst |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549568A (en) * | 2014-12-19 | 2015-04-29 | 河南合众电力技术有限公司 | Method for washing SCR denitration catalyst of coal-fired boiler of thermal power plant |
| CN104549572A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution |
| CN104815674A (en) * | 2015-05-07 | 2015-08-05 | 中国华能集团清洁能源技术研究院有限公司 | Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof |
| CN104826669A (en) * | 2015-04-26 | 2015-08-12 | 重庆大学 | Alkali washing liquid for regenerating SCR denitration catalysts and application thereof |
| CN105289758A (en) * | 2015-10-20 | 2016-02-03 | 清华大学 | Efficient chelating regeneration method for calcium-poisoned denitration catalyst |
| 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 |
| CN105618162A (en) * | 2016-01-04 | 2016-06-01 | 大唐国际化工技术研究院有限公司 | Recycling and reusing method of waste vanadium tungsten titanium-based denitration catalyst |
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| 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 |
| CN105413760B (en) * | 2014-09-12 | 2018-04-13 | 神华集团有限责任公司 | The method for activation recovering of the composition of cleaning solution and its SCR catalyst of application and failure |
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| CN104549572A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution |
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| CN104826669B (en) * | 2015-04-26 | 2017-05-17 | 重庆大学 | Alkali washing liquid for regenerating SCR denitration catalysts and application thereof |
| CN104815674A (en) * | 2015-05-07 | 2015-08-05 | 中国华能集团清洁能源技术研究院有限公司 | Inactivated vanadium-titanium-based honeycomb-like denitration catalyst combined denitration-demercuration modifying regeneration liquid and preparation method thereof |
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| CN107159318A (en) * | 2017-05-24 | 2017-09-15 | 清华大学 | A kind of neutral complexing cleaning liquid and renovation process for calcium intoxication denitrating catalyst |
| CN112371109A (en) * | 2020-11-26 | 2021-02-19 | 西安建筑科技大学 | Preparation method of aged vanadium-based catalyst and rare earth regenerated denitration catalyst |
| CN114471745A (en) * | 2022-04-06 | 2022-05-13 | 山东万达环保科技有限公司 | Regeneration method of SCR denitration catalyst and application of SCR denitration catalyst in denitration |
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