CN104801182B - A kind of renovation process of denitrating catalyst - Google Patents
A kind of renovation process of denitrating catalyst Download PDFInfo
- Publication number
- CN104801182B CN104801182B CN201510156388.9A CN201510156388A CN104801182B CN 104801182 B CN104801182 B CN 104801182B CN 201510156388 A CN201510156388 A CN 201510156388A CN 104801182 B CN104801182 B CN 104801182B
- Authority
- CN
- China
- Prior art keywords
- catalyst
- denitrating
- renovation process
- calcining
- duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A renovation process for denitrating catalyst, is characterized in that being, its method comprises the following steps: (1) is used hairbrush cleaning catalyst duct when using the negative pressure of 0.05-0.07Mpa to carry out the aspiration of negative pressure to inactivation denitrating catalyst surface and duct; (2) use the cleaning fluid preparing to utilize ultrasonic wave to clean post-drying to catalyst surface and duct; (3) use 0.1 mole of salpeter solution that contains La, Ce rare earth element and aluminium dihydrogen phosphate of preparation, impregnated catalyst calcining, when increasing specific surface area of catalyst, strengthen the mechanical strength of catalyst; (4) use active ingredient maceration extract to the catalyst soakage after calcining, make-up catalyst active constituent; (5) calcining. Implement the inventive method and can reach 82-87% to decaying catalyst regeneration rear catalyst denitration efficiency, catalyst strength can improve 40%, and the method is easy to operate, has significant economic and social benefit.
Description
Technical field
The present invention relates to a kind of catalyst recovery process, be specifically related to a kind of Faveolate denitration catalyst activity and intensity extensiveMultiple method.
Background technology
The discharge of nitrogen oxide (NOx) is having a strong impact on atmospheric environment and the mankind's health, selective catalytic reduction(SCR) gas denitrifying technology is one of effective ways of NO_x removal. In recent years about losing after denitrating catalyst operation a period of timeAfter living, the research of regeneration becomes the focus of current SCR denitrating catalyst research. As a kind of SCR cigarette of being applied for by Nanjing University of TechnologyQi exhaustion denox catalyst renovation process 201210100560.5P the present invention adopts catalyst to be regenerated is purged, and then willCatalyst is put into service sink cleaning fluid and is cleaned, and dries; Again the catalyst soakage having cleaned is supplemented in liquid in activity, carry outActive supplementary, dry; Finally, the catalyst being dried is carried out to roasting, cooling, final, just can obtain the denitration catalyst of regenerationAgent. Catalyst after regeneration, denitration efficiency reaches more than 90%. By foregoing invention, the regeneration of honeycombed catalyst is obtainedGood denitration effect.
But after denitrating catalyst operation a period of time of industrial application, there is denitration efficiency decline and catalyst certainlyBody mechanical strength reduces the problem of two aspects, there is not yet so far about how strengthening the same of regenerated catalyst denitration efficiencyTime carry high-intensity pertinent literature.
The problem existing for above denitrating catalyst regeneration, the invention provides a kind of the same of denitrating catalyst intensity that strengthenTime have a method of efficient recovery catalyst activity.
Summary of the invention
In order to realize above object, the present invention regenerates to denitration honeycombed catalyst more than operation 16000h, thisThe technical scheme that invention adopts is: a kind of renovation process of denitrating catalyst, it is characterized in that being, and its method comprises following stepRapid:
(1) when using the negative pressure of 0.05-0.07Mpa to carry out the aspiration of negative pressure to decaying catalyst surface and duct, useHairbrush cleaning catalyst duct;
(2) use cleaning fluid to utilize ultrasonic wave to clean catalyst surface and duct;
(3) use 0.1 mole of salpeter solution that contains the rare earth element such as La, Ce and aluminium dihydrogen phosphate, impregnated catalyst, increasesWhen large specific surface area of catalyst, within 4 hours, strengthen the mechanical strength of catalyst 550 DEG C of calcinings;
(4) use 2% oxalic acid solution, dissolve contain major catalyst effective ingredient ammonium metavanadate and co-catalyst ammonium tungstate,The active ingredient maceration extract of ammonium molybdate, niobium pentaoxide floods the catalyst after reforming, effectively make-up catalyst activityComponent;
(5) follow procedure intensification calcining manners is calcined denitrating catalyst at 550 DEG C of maximum temperatures.
The renovation process of described a kind of denitrating catalyst, is characterized in that being, described catalyst is coal-burning power plant's denitrationThe cellular selective reduction catalyst (SCR) using.
The renovation process of described a kind of denitrating catalyst, is characterized in that, the negative pressure using in described step (1) is0.05-0.07MPa, when catalyst surface ash is carried out to dust suction, clears up with the hairbrush of diameter 3-5mm.
The renovation process of described a kind of denitrating catalyst, is characterized in that being, the cleaning fluid in described step (2) by withLower composition composition: the NaOH solution of 0.5 mole, the emulsifier op-10 of penetrating agent JFC-S, the 0.5-1% of 1-2%, 0.5-1% metalApproximately 30 DEG C of chelating agent HEDP, cleaning temperatures, scavenging period 30 minutes, ultrasonic power are 6KW, and supersonic frequency is 40HZ, cleanPost-drying temperature is 90 DEG C.
The renovation process of described a kind of denitrating catalyst, is characterized in that being, in described step (3), uses 0.1 moleSalpeter solution, catalyst crystalline phases reformation agent, crystalline phase stabilizing agent lanthanum nitrate and the cerous nitrate of dissolving 0.2-0.4%, 0.05-0.1%,Catalyst strength reinforcing agent is 2-4% solid phosphoric acid aluminum dihydrogen, and regenerated catalyst is flooded, and dipping temperature is 30 DEG C, dipping3 hours time post-drying, calcining, calcining heat is 550 DEG C of calcinings 4 hours.
The renovation process of described a kind of denitrating catalyst, is characterized in that being, the oxalic acid of described step (4) use 2% is moltenLiquid dissolves the ammonium metavanadate that contains 0.5-1%, the ammonium tungstate of 2-5%, the ammonium molybdate of 0.2-0.4%, five oxidations two of 0.05-0.1%The active ingredient maceration extract of niobium floods the catalyst after reforming, make-up catalyst active constituent.
The renovation process of described a kind of denitrating catalyst, is characterized in that being, in described step (5), calcining heat is journeyThe order calcining that heats up, calcination process is: 0-120 DEG C of 20min, 120-250 DEG C 40min, 250-350 DEG C 60min, 350-450 DEG C 60Min, 450-550 DEG C 60min, calcines 4 hours for 550 DEG C.
Advantage of the present invention and beneficial effect are as follows:
Method of the present invention is regenerated to catalyst more than running time 16000h, regeneration rear catalyst denitration efficiencyCan reach 82-87%, regeneration denitrating catalyst intensity can improve more than 40%, can reach 179N/CM3, (decaying catalyst intensity 128N/CM3), the work period is short, does not affect the denitrating technique flow process of enterprise, and cost is low, has great economic benefit and social benefit.
This invention step (1) adopt two-section calcining mode calcine for the first time reforming catalyst increase specific area beforePut, adopt the calcining of secondary temperature-programmed mode can make active constituent pay(useful) load at catalyst surface.
(2) method cleaning fluid of the present invention adopt metal-chelator HEDP to be sintered in catalyst inside K, Na, Ca,The element such as Fe, As carries out the metalchelated ultrasonic cleaning of simultaneously carrying out, and can effectively remove metallic element to catalyst poisoning inactivationImpact.
(3) method of the present invention in adopting the nitric acid cleaning catalyst surface of 0.1 mole with add high temperature bondAgent aluminium dihydrogen phosphate, can with nitric acid generation Synergy, further strengthen catalyst strength.
(4) the present invention adopts the rare earth element such as La, Ce first under the prerequisite of denitrating catalyst reaming, increase specific area,Catalyst is carried out to the dipping of effective active component, can effectively ensure that the active princlple such as V, W is farthest carried on catalysisAgent surface.
(5) can effectively improve the choosing of denitrating catalyst to NOx in flue gas adding of the niobium pentaoxide auxiliary agent of 0.05-0.1%Selecting property, improves denitration efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail
Embodiment 1
To the denitrating catalyst of operation 16000h, the negative pressure using in step (1) is 0.05MPa, to catalyst surface ashWhen carrying out dust suction, part clears up with the hairbrush of diameter 3-5mm. Step (2) is used cleaning fluid to catalyst surface and ductClean, cleaning fluid volume and catalyst volume be than being 7:1, cleaning fluid be configured to 0.5 moles of NaOH, 1% penetrating agent JFC-S, 0.5% emulsifier op-10,0.5% metal-chelator HEDP, ultrasonic power be 6KW, frequency 40HZ, 30 DEG C of cleaning temperatures,Scavenging period 30min, cleaning post-drying temperature is 90 DEG C. Step (3) is used containing 0.1 mole of 0.2% lanthanum nitrate, 0.05% nitric acidThe salpeter solution of cerium, 2% aluminium dihydrogen phosphate floods catalyst, and dipping temperature is 30 DEG C, and dip time is 3 hours, airingAfter 550 DEG C calcining 4 hours. The oxalic acid solution of step (4) use 2% dissolves 0.5% ammonium metavanadate, 2% ammonium tungstate, 0.2%The active ingredient maceration extract of ammonium molybdate, 0.05% niobium pentaoxide solution to catalyst soakage, 3 hours temperature of dip time30 DEG C. Step (5) is pressed 0-120 DEG C of 20min, 120-250 DEG C 40min, 250-350 DEG C 40min, 350-450 to above catalystDEG C 60min, 450-550 DEG C of 240min program temperature calcined, and its denitration rate can reach 85%.
Embodiment 2
To the denitrating catalyst of operation 18000h, when repeating embodiment 1, difference be in step (2), use superSound wave cleaning fluid cleans catalyst surface and duct, and cleaning fluid volume is with catalyst volume than being 7:1, and cleaning fluid formsBe 0.5 moles of NaOH, penetrating agent JFC-S of 1%, 0.6% emulsifier op-10,0.6% metal-chelator HEDP, ultrasonic powerFor 30 DEG C of 6KW, frequency 40HZ, cleaning temperatures, scavenging period 30min, post-drying. Step (3) use containing 0.1 mole 0.25%The salpeter solution of lanthanum nitrate, 0.06% cerous nitrate, 2.5% aluminium dihydrogen phosphate floods catalyst, and dipping temperature is 30 DEG C, soaksThe stain time is 3 hours, after drying, calcines 4 hours at 550 DEG C. The oxalic acid solution of step (4) use 2% dissolves 0.6% metavanadic acidThe active ingredient maceration extract of ammonium, 4% ammonium tungstate, 0.25% ammonium molybdate, 0.06% niobium pentaoxide solution is to catalyst soakage30 DEG C of 3 hours time dipping temperatures, press embodiment 1 step (5) calcining afterwards, and its denitration rate can reach 87%.
Embodiment 3
To the denitrating catalyst of operation 20000h, when repeating embodiment 2, difference be in step (2), use clearWashing lotion is cleaned catalyst surface and duct, and cleaning fluid volume is with catalyst volume than being 7:1, and cleaning fluid is configured to 0.5Moles of NaOH, penetrating agent JFC-S of 1.5%, 0.7% emulsifier op-10,0.7% metal-chelator HEDP, ultrasonic power are30 DEG C of 6KW, frequency 40HZ, cleaning temperatures, scavenging period 30min, post-drying. Step (3) is used 0.30% nitre that contains of 0.1 moleThe salpeter solution of acid lanthanum, 0.08% cerous nitrate, 3% aluminium dihydrogen phosphate floods catalyst, and dipping temperature is 30 DEG C, when dippingBetween be 3 hours, after drying 550 DEG C calcining 4 hours. Step (4) use 2.5% oxalic acid solution dissolve 0.8% ammonium metavanadate,4.5% ammonium tungstate, 0.30% ammonium molybdate, the active ingredient maceration extract of 0.08% niobium pentaoxide solution is to catalyst soakage3 hours time, 30 DEG C of dipping temperatures, by above embodiment 1 step (5) calcining, its denitration rate can reach 87% afterwards.
Embodiment 4
When the denitrating catalyst of operation 22000h is repeated to embodiment 3, difference is that the negative pressure using in (1) is0.06MPa, clears up with the hairbrush of diameter 3-5mm when catalyst surface ash is carried out to dust suction, 30 points of dust suction timesClock. (2) use cleaning fluid to catalyst surface and duct clean, cleaning fluid volume and catalyst volume be than being 7:1, cleaningLiquid is configured to 0.5 moles of NaOH, penetrating agent JFC-S of 2%, 0.9% emulsifier op-10,0.8% metal-chelator HEDP, superAcoustical power is 30 DEG C of 6KW, frequency 40HZ, cleaning temperatures, scavenging period 30min, post-drying. (3) use 0.1 mole containThe salpeter solution of 0.35% lanthanum nitrate and 0.09% cerous nitrate, 3.5% aluminium dihydrogen phosphate floods catalyst, and dipping temperature is30 DEG C, after dip time is 3 hours, after drying, calcine 4 hours at 550 DEG C. (4) oxalic acid solution of use 2% dissolving 0.9% is inclined to one sideThe active ingredient of ammonium vanadate, 5% ammonium tungstate, 0.35% ammonium molybdate, 0.09% niobium pentaoxide solution soaks catalystStain, 30 DEG C of 3 hours dipping temperatures of dip time. By above embodiment 1 step (5) calcining, its denitration rate can reach 86% afterwards.
Embodiment 5
When the denitrating catalyst of operation 24000h is repeated to embodiment 4, difference is use in step (1) negativePress as 0.07MPa, when catalyst surface ash is carried out to dust suction, clear up the dust suction time with the hairbrush of diameter 3-5mm30 minutes. Step (2) is used cleaning fluid to clean catalyst surface and duct, and cleaning fluid is configured to 0.5 moles of NaOH, clearWashing lotion volume is with catalyst volume than being 7:1, and cleaning fluid is configured to penetrating agent JFC-S of 2%, 1% emulsifier op-10,0.9%Metal-chelator HEDP, ultrasonic power be 30 DEG C of 6KW, frequency 40HZ, cleaning temperatures, scavenging period 30min, post-drying. StepSuddenly (3) are used the salpeter solution containing 0.4% lanthanum nitrate, 0.1% cerous nitrate, 4% aluminium dihydrogen phosphate of 0.1 mole to carry out catalystDipping, dipping temperature is 30 DEG C, dip time is 3 hours, after drying, calcines 4 hours at 550 DEG C. Step (4) is used 2% grassAcid solution dissolves the active ingredient of 1% ammonium metavanadate, 5% ammonium tungstate, 0.4% ammonium molybdate, 0.1% niobium pentaoxide solutionCatalyst is flooded, and 30 DEG C of 3 hours dipping temperatures of dip time, afterwards by above embodiment 1 step (5) calcining, its denitrationRate can reach 82%.
Embodiment 6
To the denitrating catalyst of operation 26000h, when repeating embodiment 5, difference is that step (2) is used ultrasonicRipple cleaning fluid cleans catalyst surface and duct, and cleaning fluid volume is with catalyst volume than being 7:1, and cleaning fluid is configured to0.5 moles of NaOH, penetrating agent JFC-S of 2%, 1% emulsifier op-10,1% metal-chelator HEDP, ultrasonic power be 6KW,30 DEG C of frequency 40HZ, cleaning temperatures, scavenging period 30min, post-drying. Step (3) use 0.1 mole containing 0.4% lanthanum nitrate,The salpeter solution of 0.1% nitric acid, 4% aluminium dihydrogen phosphate floods catalyst, and dipping temperature is 30 DEG C, and dip time is 3 littleTime, after drying, calcine 4 hours at 550 DEG C. Carry out active constituent dipping and embodiment 1 step by above embodiment 4 steps (4)(5) calcining, its denitration rate can reach 85%.
Embodiment data are as following table
Claims (7)
1. a renovation process for denitrating catalyst, is characterized in that being, its method comprises the following steps:
(1) when using the negative pressure of 0.05-0.07Mpa to carry out the aspiration of negative pressure to denitration decaying catalyst surface and duct, useHairbrush cleaning catalyst duct;
(2) use cleaning fluid to utilize ultrasonic wave to clean catalyst surface and duct; Described cleaning fluid is by following composition groupBecome: the NaOH solution of 0.5 mole, the emulsifier op-10 of penetrating agent JFC-S, the 0.5-1% of 1-2%, 0.5-1% metal-chelatorHEDP；
(3) use 0.1 mole of salpeter solution that contains La, Ce and aluminium dihydrogen phosphate, impregnated catalyst, increases catalyst specific surfaceLong-pending time, within 4 hours, strengthen the mechanical strength of catalyst 550 DEG C of calcinings;
(4) use 2% oxalic acid solution, dissolve and contain major catalyst effective ingredient ammonium metavanadate and co-catalyst ammonium tungstate, molybdic acidThe active ingredient maceration extract of ammonium, niobium pentaoxide floods the catalyst after reforming, effectively make-up catalyst active constituent;
(5) follow procedure intensification calcining manners is calcined denitrating catalyst at 550 DEG C of maximum temperatures.
2. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, described catalyst is combustionThe cellular selective reduction catalyst (SCR) that coal-fired plant's denitration is used.
3. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, in described step (1)The negative pressure using is 0.05-0.07MPa, when catalyst surface ash is carried out to dust suction, carries out with the hairbrush of diameter 3-5mmCleaning.
4. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, in described step (2)30 DEG C of cleaning temperatures, scavenging period 30 minutes, ultrasonic power be 6KW, supersonic frequency is 40HZ, cleans post-drying temperature to be90℃。
5. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, in described step (3)Use 0.1 molar nitric acid solution, dissolve catalyst crystalline phases shaping agent, the crystalline phase stabilizing agent nitric acid of 0.2-0.4%, 0.05-0.1%Lanthanum and cerous nitrate, catalyst strength reinforcing agent is 2-4% solid phosphoric acid aluminum dihydrogen, regenerated catalyst is flooded to dipping temperatureBe 30 DEG C, dip time 3 hours, calcines 4 hours at 550 DEG C after drying.
6. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, described step (4) makesOxalic acid solution with 2% dissolves the ammonium metavanadate, the ammonium tungstate of 2-5%, the ammonium molybdate of 0.2-0.4%, the 0.05-that contain 0.5-1%The catalyst of the active ingredient maceration extract of 0.1% niobium pentaoxide after to shaping floods, make-up catalyst active constituent.
7. the renovation process of a kind of denitrating catalyst according to claim 1, is characterized in that being, in described step (5)Calcining heat is temperature programming calcining, and calcination process is: 0-120 DEG C of 20min, and 120-250 DEG C of 40min, 250-350 DEG C of 60min,350-450 DEG C of 60min, 450-550 DEG C of 60min, calcines 4 hours for 550 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156388.9A CN104801182B (en) | 2015-04-03 | 2015-04-03 | A kind of renovation process of denitrating catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156388.9A CN104801182B (en) | 2015-04-03 | 2015-04-03 | A kind of renovation process of denitrating catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104801182A CN104801182A (en) | 2015-07-29 |
| CN104801182B true CN104801182B (en) | 2016-05-18 |
Family
ID=53686633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156388.9A Active CN104801182B (en) | 2015-04-03 | 2015-04-03 | A kind of renovation process of denitrating catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104801182B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289758A (en) * | 2015-10-20 | 2016-02-03 | 清华大学 | Efficient chelating regeneration method for calcium-poisoned denitration catalyst |
| CN105435634A (en) * | 2015-12-14 | 2016-03-30 | 江苏肯创催化剂再生技术有限公司 | Regeneration method for As-poisoned SCR denitration catalyst |
| CN106040317B (en) * | 2016-06-01 | 2018-10-02 | 龙岩学院 | Inactivate the method and regenerated catalyst of the enhancing of denitrating catalyst structure and activation recovering |
| CN110102284A (en) * | 2019-05-28 | 2019-08-09 | 清华大学 | It is a kind of fail SCR catalyst regeneration and demercuration method of modifying |
| CN111530508A (en) * | 2020-06-18 | 2020-08-14 | 江苏龙净科杰环保技术有限公司 | Method for regenerating deactivated denitration catalyst containing organic matters |
| CN111715217A (en) * | 2020-07-27 | 2020-09-29 | 江苏龙净科杰环保技术有限公司 | Method for regenerating denitration 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 |
| CN113019471B (en) * | 2021-02-07 | 2023-05-23 | 铜仁市诚一环保科技有限公司 | Method and equipment for cleaning denitration catalyst |
| CN113289609B (en) * | 2021-06-09 | 2023-07-14 | 大唐南京环保科技有限责任公司 | High-wear-resistance wide-temperature denitration catalyst and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6383463B1 (en) * | 1996-07-10 | 2002-05-07 | Mitsubishi Heavy Industries, Ltd. | Exhaust gas denitration method |
| CN101574671A (en) * | 2009-04-29 | 2009-11-11 | 常州市肯创环境工程技术有限公司 | Regeneration fluid for SCR denitration catalyst |
| CN102658215A (en) * | 2012-04-09 | 2012-09-12 | 南京工业大学 | SCR (selective catalytic reduction) flue gas denitration catalyst regeneration method |
-
2015
- 2015-04-03 CN CN201510156388.9A patent/CN104801182B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6383463B1 (en) * | 1996-07-10 | 2002-05-07 | Mitsubishi Heavy Industries, Ltd. | Exhaust gas denitration method |
| CN101574671A (en) * | 2009-04-29 | 2009-11-11 | 常州市肯创环境工程技术有限公司 | Regeneration fluid for SCR denitration catalyst |
| CN102658215A (en) * | 2012-04-09 | 2012-09-12 | 南京工业大学 | SCR (selective catalytic reduction) flue gas denitration catalyst regeneration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104801182A (en) | 2015-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104801182B (en) | A kind of renovation process of denitrating catalyst | |
| CN104014331B (en) | The preparation method of the Mn-Ce-W composite oxides denitrating catalyst of mesoporous TiO 2 ball load | |
| CN105536886B (en) | A kind of regeneration method of arsenic poisoning denitrating catalyst | |
| CN102962079B (en) | Regeneration method for waste vanadium-titanium-based SCR (Selective Catalytic Reduction) flue gas denitrification catalyst | |
| CN103878034B (en) | The renovation process of a kind of arsenic and phosphorism denitrifying catalyst with selective catalytic reduction | |
| CN103350004B (en) | A kind of renovation process of SCR denitrating catalyst and for the mixture of SCR denitrating catalyst regenerated liquid | |
| CN106622399B (en) | A kind of recycling method of discarded SCR denitration | |
| CN104707482B (en) | Regeneration method of deactivated catalyst | |
| CN110354914B (en) | Recycling method of inactivated SCR denitration catalyst | |
| CN103508491B (en) | Discarded honeycomb type denitrification catalyst regeneration and resource utilization method | |
| CN106040317B (en) | Inactivate the method and regenerated catalyst of the enhancing of denitrating catalyst structure and activation recovering | |
| CN102814201A (en) | Cleaning and regeneration method for SCR denitration catalyst poisoned by arsenic component in flue | |
| CN102716736A (en) | Composite catalyst capable of depriving nitre and mercury simultaneously and preparation method thereof | |
| CN101972652B (en) | Preparation method of compound SCR catalyst with zero-valent mercury conversion function | |
| CN103638921B (en) | Vanadium-tungsten denitration catalyst and preparation method thereof | |
| CN110252387B (en) | Iron-based catalyst for medium-high temperature denitration and preparation method and application thereof | |
| CN112246277A (en) | Mn modified Cu-SSZ-13 catalyst and preparation method and application thereof | |
| CN107837826A (en) | Inactivate the process of regenerating of catalyst for denitrating flue gas | |
| CN101259417B (en) | Regeneration method of sulphur absorption V2O5/AC catalytic adsorption agent | |
| CN103433081B (en) | Regeneration method for honeycomb type SCR (Selective Catalytic Reduction) denitration catalyst | |
| CN108671967A (en) | A kind of solvent heat green high-efficient regeneration method of sintering flue gas failure SCR denitration | |
| CN110354915B (en) | Recycling method of alkali metal poisoned SCR denitration catalyst | |
| CN103088217A (en) | Method for recovering tungsten component from selective catalytic reduction denitrification catalyst | |
| CN104162456B (en) | A kind of cleaning fluid for denitrating catalyst regeneration and cleaning method | |
| CN103506121A (en) | Low-temperature denitration catalyst with iron loaded on carbon nanotube and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |