CN104549572A - Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution - Google Patents
Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution Download PDFInfo
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- CN104549572A CN104549572A CN201410839516.5A CN201410839516A CN104549572A CN 104549572 A CN104549572 A CN 104549572A CN 201410839516 A CN201410839516 A CN 201410839516A CN 104549572 A CN104549572 A CN 104549572A
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Abstract
The invention discloses an impregnation solution for regeneration of an SCR (selective catalytic reduction) denitrification catalyst. The impregnation solution comprises a cleaning impregnation solution and an active impregnation solution, wherein the cleaning impregnation solution comprises components in percentage by mass as follows: 0.5%-1.0% of a surfactant, 0.5%-1.0% of a micropore penetration enhancer, 2%-5% of alkaline organic salt and the balance of deionized water; the active impregnation solution comprises components in percentage by mass as follows: 0.2%-1.8% of ammonium metavanadate, 6%-8% of ammonium tungstate, 3%-4% of manganous nitrate, 12%-18% of weak acid and the balance of deionized water. According to the impregnation solution for regeneration of the SCR denitrification catalyst, the inactivated denitrification catalyst can recover activity, and secondary environmental pollution caused by the waste denitrification catalyst can be prevented; and the denitrification rate of the regenerated denitrification catalyst can reach 85%-92%. Besides, the invention further discloses a preparation method of the impregnation solution for regeneration of the SCR denitrification catalyst.
Description
Technical field
The present invention relates to a kind of SCR denitration regeneration maceration extract and preparation method thereof, belong to flue gas SCR denitration catalyst regeneration techniques field.
Background technology
Catalyst is the core of SCR technology, and catalyst is expensive, and every cubic metre of marked price is up to 2.5 ~ 30,000 yuan, and its cost accounts for 40% of denitration engineering comprehensive cost.SCR catalyst belongs to running stores again, within general about 3 years, just needs to change, and therefore, the service life of catalyst determines will stablize every year and produces a certain amount of decaying catalyst.SCR catalyst is after catalytic reaction each time, and its physicochemical properties all inevitably minor variations occur, and along with minor variations adds up many times, its activity and selectivity declines gradually, even loses the value continuing to use, namely catalysqt deactivation occurs.Inefficacy SCR catalyst contains V
2o
5, WO
3and the heavy metal assembled in use procedure, research of technique is awaited, if the mishandling secondary pollution that will cause environment to its recovery and method of disposal.In August, 2014, national environmental protection cloth promulgated by the ministries or commissions of the Central Government " waste and old denitrating catalyst danger wastes operation permission guide ", clearly for preventing environment to be secondary polluted, vanadium Titanium series catalyst need improve regeneration level.
The renovation process of a kind of sulfur poisoning denitrifying catalyst with selective catalytic reduction disclosed in Chinese patent literature CN 104028315 A, its renovation process mainly comprises mechanical cleaning, alkalies cleaning and Acidic Liquid dipping, and after the method regeneration, the denitration efficiency of denitrating catalyst can only reach 81% ~ 88%.
Summary of the invention
The present invention, just for the deficiency that prior art exists, provides a kind of SCR denitration to regenerate maceration extract and preparation method thereof, and the denitrating catalyst after using this regeneration maceration extract to regenerate has higher denitration efficiency.
For solving the problem, the technical solution used in the present invention is as follows:
A kind of SCR denitration regeneration maceration extract, comprising: cleaning maceration extract and active maceration extract;
Described cleaning maceration extract comprises the component of following mass percent: surfactant 0.5 ~ 1.0%, micropore permeation promoter 0.5 ~ 1.0%, basic organic salts 2 ~ 5%, the deionized water of surplus;
Described active maceration extract comprises the component of following mass percent: ammonium metavanadate 0.2 ~ 1.8%, ammonium tungstate 6 ~ 8%, manganese nitrate 3 ~ 4%, weak acid 12 ~ 18%, the deionized water of surplus.
As the improvement of technique scheme, described surfactant is the one in lauryl sodium sulfate and neopelex; Described micropore permeation promoter is polysiloxane polyoxyethylene ether; Described basic organic salts is the one in malate, sodium phenate and ethylene diamine tetra methylene phosphonic acid sodium.
As the improvement of technique scheme, described weak acid is the one of citric acid or oxalic acid.
The preparation method of above-mentioned a kind of SCR denitration regeneration maceration extract, comprises the following steps:
The preparation of step one, cleaning maceration extract: take deionized water, surfactant, micropore permeation promoter and basic organic salts by proportioning, by above-mentioned mixing of materials and ultrasonic process 1 hour, makes it mix;
The preparation of step 2, active maceration extract: take deionized water, ammonium metavanadate, ammonium tungstate, manganese nitrate, weak acid by proportioning, is stirred to pressed powder dissolves above-mentioned mixing of materials completely, add thermal agitation 6 hours, filter the clarified solution obtained at 60 DEG C.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
A kind of SCR denitration regeneration maceration extract of the present invention, the denitrating catalyst of inactivation can be made to reply active, prevent waste denitration catalyst from producing secondary pollution to environment, manganese nitrate is also added in maceration extract of the present invention, use manganese on efficient carrier, makes catalyst have high anti-SO as active material load
2active with steam, thus improve catalytic performance, raising catalytic efficiency; Use the denitrating catalyst after a kind of SCR denitration regeneration maceration extract of the present invention regeneration, its denitration rate can reach 85 ~ 92%.
Detailed description of the invention
Below in conjunction with specific embodiments content of the present invention is described.
specific embodiment 1
A kind of SCR denitration regeneration maceration extract described in the present embodiment, comprising: cleaning maceration extract and active maceration extract;
Described cleaning maceration extract comprises the component of following mass percent: neopelex 0.8%, polysiloxane polyoxyethylene ether 0.7%, malate 3%, the deionized water of surplus;
Described active maceration extract comprises the component of following mass percent: ammonium metavanadate 1.2%, ammonium tungstate 7%, manganese nitrate 3.5%, citric acid 15%, the deionized water of surplus.
The preparation method of a kind of SCR denitration regeneration maceration extract described in the present embodiment, comprises the following steps:
The preparation of step one, cleaning maceration extract: take deionized water, neopelex, polysiloxane polyoxyethylene ether, malate by proportioning, by above-mentioned mixing of materials and ultrasonic process 1 hour, makes it mix;
The preparation of step 2, active maceration extract: take deionized water, ammonium metavanadate, ammonium tungstate, manganese nitrate, citric acid by proportioning, is stirred to pressed powder dissolves above-mentioned mixing of materials completely, add thermal agitation 6 hours, filter the clarified solution obtained at 60 DEG C.
The SCR denitration of catalytic efficiency less than 50% is placed in described cleaning maceration extract ultrasonic wave added cleaning 20 ~ 60 minutes, then uses deionized water rinsed clean; Again SCR denitration be impregnated in described active maceration extract, dip time 1 ~ 4 hour; Finally by SCR denitration at 110 ~ 120 DEG C dry 1 ~ 3 hour, then roasting 2 ~ 5 hours at 400 ~ 410 DEG C, namely obtains the SCR denitration after regenerating.
After testing, the SCR denitration denitration rate after regeneration is 88 ~ 92%.
specific embodiment 2
A kind of SCR denitration regeneration maceration extract described in the present embodiment, comprising: cleaning maceration extract and active maceration extract;
Described cleaning maceration extract comprises the component of following mass percent: neopelex 0.5%, polysiloxane polyoxyethylene ether 0.5%, ethylene diamine tetra methylene phosphonic acid sodium 2%, the deionized water of surplus;
Described active maceration extract comprises the component of following mass percent: ammonium metavanadate 0.2%, ammonium tungstate 6%, manganese nitrate 3%, oxalic acid 12%, the deionized water of surplus.
The preparation method of a kind of SCR denitration regeneration maceration extract described in the present embodiment, comprises the following steps:
The preparation of step one, cleaning maceration extract: take deionized water, neopelex, polysiloxane polyoxyethylene ether, ethylene diamine tetra methylene phosphonic acid sodium by proportioning, by above-mentioned mixing of materials and ultrasonic process 1 hour, makes it mix;
The preparation of step 2, active maceration extract: take deionized water, ammonium metavanadate, ammonium tungstate, manganese nitrate, oxalic acid by proportioning, is stirred to pressed powder dissolves above-mentioned mixing of materials completely, add thermal agitation 6 hours, filter the clarified solution obtained at 60 DEG C.
The SCR denitration of catalytic efficiency less than 50% is placed in described cleaning maceration extract ultrasonic wave added cleaning 20 ~ 60 minutes, then uses deionized water rinsed clean; Again SCR denitration be impregnated in described active maceration extract, dip time 1 ~ 4 hour; Finally by SCR denitration at 110 ~ 120 DEG C dry 1 ~ 3 hour, then roasting 2 ~ 5 hours at 400 ~ 410 DEG C, namely obtains the SCR denitration after regenerating.
After testing, the SCR denitration denitration rate after regeneration is 85 ~ 89%.
specific embodiment 3
A kind of SCR denitration regeneration maceration extract described in the present embodiment, comprising: cleaning maceration extract and active maceration extract;
Described cleaning maceration extract comprises the component of following mass percent: lauryl sodium sulfate 1.0%, polysiloxane polyoxyethylene ether 1.0%, sodium phenate 5%, the deionized water of surplus;
Described active maceration extract comprises the component of following mass percent: ammonium metavanadate 1.8%, ammonium tungstate 8%, manganese nitrate 4%, oxalic acid 18%, the deionized water of surplus.
The preparation method of a kind of SCR denitration regeneration maceration extract described in the present embodiment, comprises the following steps:
The preparation of step one, cleaning maceration extract: take deionized water, lauryl sodium sulfate, polysiloxane polyoxyethylene ether, sodium phenate by proportioning, by above-mentioned mixing of materials and ultrasonic process 1 hour, makes it mix;
The preparation of step 2, active maceration extract: take deionized water, ammonium metavanadate, ammonium tungstate, manganese nitrate, oxalic acid by proportioning, is stirred to pressed powder dissolves above-mentioned mixing of materials completely, add thermal agitation 6 hours, filter the clarified solution obtained at 60 DEG C.
The SCR denitration of catalytic efficiency less than 50% is placed in described cleaning maceration extract ultrasonic wave added cleaning 20 ~ 60 minutes, then uses deionized water rinsed clean; Again SCR denitration be impregnated in described active maceration extract, dip time 1 ~ 4 hour; Finally by SCR denitration at 110 ~ 120 DEG C dry 1 ~ 3 hour, then roasting 2 ~ 5 hours at 400 ~ 410 DEG C, namely obtains the SCR denitration after regenerating.
After testing, the SCR denitration denitration rate after regeneration is 90 ~ 92%.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the present invention specifically implements to be only limitted to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (4)
1. a SCR denitration regeneration maceration extract, is characterized in that, comprising: cleaning maceration extract and active maceration extract;
Described cleaning maceration extract comprises the component of following mass percent: surfactant 0.5 ~ 1.0%, micropore permeation promoter 0.5 ~ 1.0%, basic organic salts 2 ~ 5%, the deionized water of surplus;
Described active maceration extract comprises the component of following mass percent: ammonium metavanadate 0.2 ~ 1.8%, ammonium tungstate 6 ~ 8%, manganese nitrate 3 ~ 4%, weak acid 12 ~ 18%, the deionized water of surplus.
2. a kind of SCR denitration regeneration maceration extract as claimed in claim 1, is characterized in that, described surfactant is the one in lauryl sodium sulfate and neopelex; Described micropore permeation promoter is polysiloxane polyoxyethylene ether; Described basic organic salts is the one in malate, sodium phenate and ethylene diamine tetra methylene phosphonic acid sodium.
3. a kind of SCR denitration regeneration maceration extract as claimed in claim 1, it is characterized in that, described weak acid is the one of citric acid or oxalic acid.
4. the preparation method of a kind of SCR denitration regeneration maceration extract as claimed in claim 1, is characterized in that, comprise the following steps:
The preparation of step one, cleaning maceration extract: take deionized water, surfactant, micropore permeation promoter and basic organic salts by proportioning, by above-mentioned mixing of materials and ultrasonic process 1 hour, makes it mix;
The preparation of step 2, active maceration extract: take deionized water, ammonium metavanadate, ammonium tungstate, manganese nitrate, weak acid by proportioning, is stirred to pressed powder dissolves above-mentioned mixing of materials completely, add thermal agitation 6 hours, filter the clarified solution obtained at 60 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582910A (en) * | 2016-01-20 | 2016-05-18 | 华中科技大学 | Preparation method of cooperating catalyst for demercuration and denitration |
| CN106378210A (en) * | 2016-08-19 | 2017-02-08 | 安徽元琛环保科技股份有限公司 | A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof |
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| KR20120030758A (en) * | 2010-09-20 | 2012-03-29 | 한국전력공사 | Method of regenerating scr catalyst |
| CN103878035A (en) * | 2014-04-01 | 2014-06-25 | 李灏呈 | Regenerated liquid of vanadium and titanium-based selective catalytic reduction (SCR) denitration catalyst |
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- 2014-12-30 CN CN201410839516.5A patent/CN104549572A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120030758A (en) * | 2010-09-20 | 2012-03-29 | 한국전력공사 | Method of regenerating scr catalyst |
| CN103878035A (en) * | 2014-04-01 | 2014-06-25 | 李灏呈 | Regenerated liquid of vanadium and titanium-based selective catalytic reduction (SCR) denitration catalyst |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582910A (en) * | 2016-01-20 | 2016-05-18 | 华中科技大学 | Preparation method of cooperating catalyst for demercuration and denitration |
| CN105582910B (en) * | 2016-01-20 | 2019-04-23 | 华中科技大学 | A kind of preparation method of demercuration denitration synergistic catalyst |
| CN106378210A (en) * | 2016-08-19 | 2017-02-08 | 安徽元琛环保科技股份有限公司 | A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof |
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