CN106179528A - A kind of renovation process of alkali metal poisoning denitrating catalyst - Google Patents
A kind of renovation process of alkali metal poisoning denitrating catalyst Download PDFInfo
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- CN106179528A CN106179528A CN201610496335.6A CN201610496335A CN106179528A CN 106179528 A CN106179528 A CN 106179528A CN 201610496335 A CN201610496335 A CN 201610496335A CN 106179528 A CN106179528 A CN 106179528A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 89
- 229910052783 alkali metal Inorganic materials 0.000 title claims abstract description 25
- 150000001340 alkali metals Chemical class 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 20
- 238000009418 renovation Methods 0.000 title claims abstract description 18
- 206010027439 Metal poisoning Diseases 0.000 title claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 17
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000011069 regeneration method Methods 0.000 claims description 23
- 230000008929 regeneration Effects 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 9
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 6
- 239000001099 ammonium carbonate Substances 0.000 claims description 6
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 6
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 6
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 4
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- XZXYQEHISUMZAT-UHFFFAOYSA-N 2-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=CC=C(C)C=2)O)=C1 XZXYQEHISUMZAT-UHFFFAOYSA-N 0.000 claims description 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 claims description 2
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- 229940107816 ammonium iodide Drugs 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 231100000572 poisoning Toxicity 0.000 claims 7
- 230000000607 poisoning effect Effects 0.000 claims 7
- 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 1
- 230000002779 inactivation Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 229940043430 calcium compound Drugs 0.000 abstract description 2
- 150000001674 calcium compounds Chemical class 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- -1 ammonium radical ion Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/485—Impregnating or reimpregnating with, or deposition of metal compounds or catalytically active elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/92—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The invention discloses the renovation process of a kind of alkali metal poisoning denitrating catalyst, after the denitrating catalyst ash disposal that alkali metal is poisoned, impregnated in ammonium salt aqueous solution；Then mixed solution is transferred in microwave reactor, carries out microwave treatment, then the denitrating catalyst after being regenerated through filtering, drying, after roasting.The renovation process of the alkali metal poisoning denitrating catalyst of the present invention is simple to operate, it is short to process the time, the alkali metal on inactivation denitrating catalyst surface is had preferable removal effect, can also remove most calcium compounds on catalyst simultaneously.Further, in regenerative process, the active component of denitrating catalyst will not run off in a large number.
Description
Technical field
The present invention relates to selective catalytic reduction catalysts technical field, be specifically related to a kind of alkali metal poisoning denitration catalyst
The renovation process of agent.
Background technology
The advantages such as SCR (SCR) technology is high with its denitration efficiency, floor space is little, reliable, are should
Use most commonly used NOxEmission control technique.As the core of SCR denitration technology, the general of denitrating catalyst is running
Will inactivate after 24000h, when the time comes for meeting NOxDischarge index, needs to change fresh catalyst.And catalyst cost is higher, become
Originally the 40% of denitration total investment of engineering is accounted for.Therefore, use effective means that decaying catalyst is carried out Regeneration Treatment so that it is denitration
Efficiency is recovered to fresh sample level, saves energy and reduce the cost coal-burning power plant significant.
Alkali metal (K, Na) is one of major reason of causing denitrating catalyst to inactivate.Cardinal principle is alkali metal
Being remarkably decreased of acid function of denitrating catalyst can be caused, affect NH3Absorption on denitrating catalyst surface.Existing research
Showing, the aqueous sulfuric acid of 0.5 mol/L cleans has preferable alkali metal removal effect, but, denitration can be caused to urge
Agent active component V2O5Loss.Thus it is necessary to develop the renovation process of novel alkali metal poisoning denitrating catalyst.In recent years
Coming, on existing multiple removal denitrating catalyst, alkali-metal method is open, such as CN 104226380A, CN in this area
105080622A, CN 105057008A, US2007032373, US7723251 etc..But still there is operation complexity, scavenging period
The problems such as long, loss of active component rate is high.
Summary of the invention
The present invention provides the renovation process of a kind of alkali metal poisoning denitrating catalyst, by using the regeneration side of the present invention
Method, can effectively remove the alkali metal on inactivation denitrating catalyst, also can remove major part deposition simultaneously in the short period of time
Calcium compounds on a catalyst.And, it is most important that, can effectively prevent active component in denitrating catalyst regenerative process
Loss.
To achieve these goals, the technological means that the present invention uses is:
The renovation process of described alkali metal poisoning denitrating catalyst, comprises the steps of
1) compound concentration is the ammonium salt aqueous solution of 1 ~ 40 wt%, be impregnated in ammonium salt aqueous solution by the denitrating catalyst after ash disposal；
2) by step 1) in mixed solution be transferred in microwave reactor, at 25 ~ 100 DEG C, microwave treatment 1 ~ 60min, so
Rear filtration, drying, under 400 ~ 700 DEG C of air atmospheres after roasting 1 ~ 8h, obtain the denitrating catalyst after regeneration.
Step 1) described in ammonium salt be ammonium fluoride, ammonium chloride, ammonium bromide, ammonium iodide, ammonium sulfate, ammonium hydrogen sulfate, nitric acid
One in ammonium, ammonium carbonate, ammonium hydrogen carbonate.
Step 1) described in the liquid-solid ratio (mL/g) of ammonium salt aqueous solution and denitrating catalyst be 1:1 ~ 50:1.
Step 1) described in ash disposal soot blowing technology well known in the art can be used to remove catalyst surface and duct
Interior dust stratification, includes but not limited to the conventional meanses such as compressed air purging, high pressure water washing, the aspiration of negative pressure.
Step 2) described in the output of microwave reactor be 100 ~ 1000 W.
The renovation process of described a kind of alkali metal poisoning denitrating catalyst, preferred scheme is:
1) compound concentration is the ammonium salt aqueous solution of 5 ~ 20 wt%, be impregnated in ammonium salt aqueous solution by the denitrating catalyst after ash disposal；
2) by step 1) in mixed solution be transferred in microwave reactor, at 60 ~ 90 DEG C, stirring, backflow, microwave treatment 5
~ 20min, then filters, dries, and under 500 ~ 600 DEG C of air atmospheres after roasting 1.5 ~ 4h, obtains the denitrating catalyst after regeneration.
Step 1) described in the liquid-solid ratio (mL/g) of ammonium salt aqueous solution and denitrating catalyst be preferably 4:1 ~ 25:1.
Step 2) described in the output of microwave reactor be preferably 300 ~ 900 W.
Beneficial effect
(1) regeneration methods of the invention uses microwave treatment, and in strengthening ammonium salt, ammonium radical ion is handed over the ion of alkali metal ion
Changing, simple to operate, the recovery time is short, can effectively remove the alkali metal on inactivation denitrating catalyst.
(2) regeneration methods of the invention, for CaO, CaSO of deposition on inactivation denitrating catalyst4、CaCO3Close Deng calcification
Thing also has preferable removal effect.
(3) regeneration methods of the invention, use ammonium salt aqueous solution as cleanout fluid, it is not necessary to surfactant, penetrating agent,
The organic interpolation such as chelating agen, chemical composition is simple, decreases the recycling difficulty of regenerated effluent.
(4) use the present invention renovation process, after regeneration, the turnover rate of the active component of denitrating catalyst is low, permissible
Reduce follow-up active component and supplement pickup, or directly omission active component supplements impregnation steps, reduces regeneration cost.
Detailed description of the invention
Following example are by further illustrating that the present invention is given by the selective catalytic denitrification process reaction, rather than to this
Bright restriction.
Embodiment 1
Inactivation denitrating catalyst selects the V after certain coal-burning power plant domestic operation 24000h2O5-WO3/TiO2Honeycomb fashion denitration catalyst
Agent, removes the dust stratification in catalyst surface and duct with compressed air purging.
Compound concentration is the aqueous ammonium chloride solution of 10 wt%, be impregnated in wherein by the denitrating catalyst after ash disposal.Then will
Mixed solution is transferred in microwave reactor, at 90 DEG C, microwave treatment 15 min, then filters, dries, at 550 DEG C of air
Under atmosphere after roasting 2h, obtain the denitrating catalyst after regeneration.Wherein, aqueous ammonium chloride solution and the liquid-solid ratio (mL/ of denitrating catalyst
G) being 20:1, the output of microwave reactor is 500W.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 99.5%, Na element reduces 99.1%, and Ca element subtracts
Few 78%, V2O5Turnover rate 2.5%.
Embodiment 2
Inactivation denitrating catalyst selects the V after certain coal-burning power plant domestic operation 18000h2O5-WO3/TiO2Corrugated plate dst denitration is urged
Agent, first purges by compressed air, then the dust stratification in the aspiration of negative pressure removes catalyst surface and duct.
Compound concentration is the ammonium fluoride aqueous solution of 5 wt%, be impregnated in wherein by the denitrating catalyst after ash disposal.Then will be mixed
Close solution to be transferred in microwave reactor, at 80 DEG C, microwave treatment 20 min, then filters, dries, at 500 DEG C of air gas
Under atmosphere after roasting 4h, obtain the denitrating catalyst after regeneration.Wherein, ammonium fluoride aqueous solution and the liquid-solid ratio (mL/g) of denitrating catalyst
For 25:1, the output of microwave reactor is 900W.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 98.6%, Na element reduces 99.7%, and Ca element subtracts
Few 72.8%, V2O5Turnover rate 4.3%.
Embodiment 3
Inactivation denitrating catalyst selects the V after certain coal-burning power plant domestic operation 22000h2O5-MoO3/TiO2Board-like denitration catalyst
Agent, removes the dust stratification in catalyst surface and duct with high pressure water washing.Again the board-like catalyst after ash disposal is carried out creme with
Steel mesh lock out operation.
Compound concentration is the ammonium sulfate solution of 20 wt%, be impregnated in wherein by the denitrating catalyst creme after ash disposal.So
After mixed solution is transferred in microwave reactor, at 60 DEG C, microwave treatment 5 min, then filter, dry, at 600 DEG C of skies
Under gas atmosphere after roasting 1.5h, obtain the denitrating catalyst after regeneration.Wherein, ammonium sulfate solution and the liquid-solid ratio of denitrating catalyst
(mL/g) being 4:1, the output of microwave reactor is 300W.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 99.1%, Na element reduces 99.0%, and Ca element subtracts
Few 65.9%, V2O5Turnover rate 4.9%.
Embodiment 4
Inactivation denitrating catalyst selects the V after certain coal-burning power plant domestic operation 21000h2O5-MoO3/TiO2Board-like denitration catalyst
Agent, first removes the dust stratification in catalyst surface and duct with compressed air purging.Again the board-like catalyst after ash disposal is carried out cream
Material and steel mesh lock out operation.
Compound concentration is the ammonium sulfate solution of 15 wt%, be impregnated in wherein by the denitrating catalyst creme after ash disposal.So
After mixed solution is transferred in microwave reactor, at 70 DEG C, microwave treatment 10 min, then filter, dry, at 500 DEG C
Under air atmosphere after roasting 3h, obtain the denitrating catalyst after regeneration.Wherein, ammonium sulfate solution and the liquid-solid ratio of denitrating catalyst
(mL/g) being 10:1, the output of microwave reactor is 400W.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 97.2%, Na element reduces 98.0%, and Ca element subtracts
Few 71.1%, V2O5Turnover rate 3.7%.
Embodiment 5
Inactivation denitrating catalyst selects the V after certain coal-burning power plant domestic operation 21000h2O5-WO3/TiO2Honeycomb fashion denitration catalyst
Agent, coordinates crooked chisel dredging with compressed air purging, removes the dust stratification in catalyst surface and duct.
Compound concentration is the ammonium bicarbonate aqueous solution of 12.5 wt%, be impregnated in wherein by the denitrating catalyst after ash disposal.So
After mixed solution is transferred in microwave reactor, at 85 DEG C, microwave treatment 15 min, then filter, dry, at 560 DEG C
Under air atmosphere after roasting 2.5h, obtain the denitrating catalyst after regeneration.Wherein, ammonium bicarbonate aqueous solution and the liquid of denitrating catalyst
Gu be 15:1 than (mL/g), the output of microwave reactor is 700W.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 98.7%, Na element reduces 99.4%, and Ca element subtracts
Few 85.0%, V2O5Turnover rate 6.1%.
Comparative example 1
The denitrating catalyst used, and ash disposal step is with embodiment 1.
Prepare the aqueous sulfuric acid of 0.5 mol/L, the catalyst after ash disposal be impregnated in wherein.Again at 60 DEG C, ultrasonic place
Reason 1h, then filters, dries, obtain the denitrating catalyst after regeneration.Wherein, aqueous sulfuric acid and the liquid-solid ratio of denitrating catalyst
(mL/g) it is 20:1, ultrasonic power 50kHz.
Regenerated outcome: after regeneration, the K element on denitrating catalyst reduces 92.2%, Na element reduces 89.4%, and Ca element subtracts
Few 33.3%, V2O5Turnover rate 52.7%.
Claims (8)
1. the renovation process of an alkali metal poisoning denitrating catalyst, it is characterised in that comprise the steps of
1) compound concentration is the ammonium salt aqueous solution of 1 ~ 40 wt%, be impregnated in ammonium salt aqueous solution by the denitrating catalyst after ash disposal；
2) by step 1) in mixed solution be transferred in microwave reactor, at 25 ~ 100 DEG C, microwave treatment 1 ~ 60min, so
Rear filtration, drying, under 400 ~ 700 DEG C of air atmospheres after roasting 1 ~ 8h, obtain the denitrating catalyst after regeneration.
The renovation process of a kind of alkali metal the most according to claim 1 poisoning denitrating catalyst, it is characterised in that step 1)
In ammonium salt be ammonium fluoride, ammonium chloride, ammonium bromide, ammonium iodide, ammonium sulfate, ammonium hydrogen sulfate, ammonium nitrate, ammonium carbonate, ammonium hydrogen carbonate
In one.
The renovation process of a kind of alkali metal the most according to claim 1 poisoning denitrating catalyst, it is characterised in that step 1)
In the liquid-solid ratio (mL/g) of ammonium salt aqueous solution and denitrating catalyst be 1:1 ~ 50:1.
The renovation process of a kind of alkali metal the most according to claim 1 poisoning denitrating catalyst, it is characterised in that step 2)
The output of middle microwave reactor is 100 ~ 1000 W.
The renovation process of a kind of alkali metal the most according to claim 1 poisoning denitrating catalyst, it is characterised in that step 1)
In the concentration of ammonium salt aqueous solution be 5 ~ 20 wt%.
The renovation process of a kind of alkali metal the most according to claim 1 poisoning denitrating catalyst, it is characterised in that step 2)
Middle mixed solution is transferred in microwave reactor, at 60 ~ 90 DEG C, and stirring, backflow, microwave treatment 5 ~ 20min, then filter,
Dry, under 500 ~ 600 DEG C of air atmospheres after roasting 1.5 ~ 4h, obtain the denitrating catalyst after regeneration.
The renovation process of a kind of alkali metal the most according to claim 3 poisoning denitrating catalyst, it is characterised in that step 1)
In the liquid-solid ratio (mL/g) of ammonium salt aqueous solution and denitrating catalyst be 4:1 ~ 25:1.
The renovation process of a kind of alkali metal the most according to claim 4 poisoning denitrating catalyst, it is characterised in that step 2)
The output of middle microwave reactor is 300 ~ 900 W.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107469874A (en) * | 2017-09-11 | 2017-12-15 | 华中科技大学 | A kind of catalyst regeneration device and method based on microwave decoking |
| CN108144656A (en) * | 2017-11-23 | 2018-06-12 | 浙江天蓝环保技术股份有限公司 | A kind of regenerated liquid and regeneration method for denitrating catalyst of being poisoned |
| CN108722436A (en) * | 2018-06-04 | 2018-11-02 | 浙江大学 | A kind of solution low temperature SCR denitration catalyst SO2The method of poisoning |
| CN110769933A (en) * | 2017-06-30 | 2020-02-07 | 三菱日立电力系统株式会社 | Regeneration method and regeneration system of denitration catalyst |
| CN111036310A (en) * | 2019-12-25 | 2020-04-21 | 中节能万润股份有限公司 | Regenerated monolithic molecular sieve-based denitration catalyst, and regeneration method and application thereof |
| CN111111772A (en) * | 2019-12-25 | 2020-05-08 | 中节能万润股份有限公司 | A kind of regeneration method of molecular sieve denitration catalyst |
| 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 |
| CN114870907A (en) * | 2022-06-13 | 2022-08-09 | 苏州西热节能环保技术有限公司 | Regeneration method of alkali/alkaline earth metal poisoned denitration catalyst |
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| 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 |
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| CN114870907B (en) * | 2022-06-13 | 2023-10-20 | 苏州西热节能环保技术有限公司 | Regeneration method of denitration catalyst for alkali/alkaline earth metal poisoning |
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