CN104138771A - Method for regeneration of SCR denitration catalyzer - Google Patents
Method for regeneration of SCR denitration catalyzer Download PDFInfo
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- CN104138771A CN104138771A CN201410369324.2A CN201410369324A CN104138771A CN 104138771 A CN104138771 A CN 104138771A CN 201410369324 A CN201410369324 A CN 201410369324A CN 104138771 A CN104138771 A CN 104138771A
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- scr denitrating
- denitrating catalyst
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Abstract
The invention relates to a method for regeneration of an SCR denitration catalyzer. The method for regeneration of the SCR denitration catalyzer sequentially comprises the following steps that (a) evaluation is conducted, wherein the appearance, the physical property and the chemical components of the SCR denitration catalyzer are detected, and the possibility of regeneration of the SCR denitration catalyzer is evaluated; (b) dust removal is conducted, wherein dust adhering to the surface of the SCR denitration catalyzer is removed by blowing air to the SCR denitration catalyzer; (c) cleaning is conducted, wherein the SCR denitration catalyzer is immersed in deionized water or a strong-acid solution to be cleaned until the pH value does not change any more; (d) activation is conducted, wherein the dried SCR denitration catalyzer is immersed in activating fluid for the activating reaction until the catalytic activity of the SCR denitration catalyzer tends to stability; (e) drying is conducted, wherein the SCR denitration catalyzer obtained after the activating reaction is taken out and dried. According to the method for regeneration of the SCR denitration catalyzer, regeneration of a toxic catalyzer or an ineffective catalyzer can be achieved through the steps including evaluation, dust removal, cleaning, activation, drying and the like, and the operating cost and the environment load can be lightened for enterprises; in addition, all the steps are easy to execute, cost is low, and the method is suitable for large-scale application and popularization.
Description
Technical field
The invention belongs to denitrifying catalyst with selective catalytic reduction field, be specifically related to a kind of renovation process of SCR denitrating catalyst.
Background technology
Nitrogen oxide (NO
x) be one of main component of flue gas, be also the major pollutants of atmospheric environment.Its on the one hand can with SO
xform destructive stronger acid rain Deng gas; Can form on the other hand the photochemical fog that toxicity is very strong, animals and plants are caused serious injury.Along with being on the rise of smoke pollution, country has strengthened the dynamics of forcing denitration.
Denitration method for flue gas can be divided into dry method and wet method two classes, the selective catalytic reduction of dry method (being called for short SCR, Selective Catalytic Redution), SNCR (SNCR), non-selective catalytic reduction (NSCR), molecular sieve, active carbon adsorption and combined desulphurization and denitrification process etc.Wherein high, the technology maturation of SCR denitration rate, has become the main method of domestic and international improvement nitrogen oxide.In SCR denitrating technique, SCR denitrating catalyst is core, and its investment accounts for 30%～50% of initial investment volume conventionally; And for for convenience detach and replacing, SCR denitrating catalyst is conventionally made into catalyst module and uses.Owing to containing the multiple pollutant such as alkali metal oxide and flying dust matter in flue gas, easily make SCR denitrating catalyst poisoning and stop up, cause SCR denitrating catalyst activity reduce gradually or lose.But SCR denitrating catalyst is expensive, if because its poisoning or activity decreased just directly abandons, not only increased the weight of the operation cost of enterprise, and do not met the requirement of environmental protection.Therefore, design a kind of renovation process of SCR denitrating catalyst, in service life that not only can significant prolongation SCR denitrating catalyst, can also reduce the operating cost of SCR denitrating catalyst system, the operation cost and the environmental pressure that alleviate enterprise, have very important significance.
Summary of the invention
The present invention seeks to provide in order to overcome the deficiencies in the prior art a kind of renovation process of SCR denitrating catalyst.
For solving above technical problem, a kind of technical scheme that the present invention takes is: a kind of renovation process of SCR denitrating catalyst, it is characterized in that, and comprise the following steps successively:
(a) assessment: the outward appearance to SCR denitrating catalyst, physical property, chemical composition detect, the Possibility of Regeneration of assessment SCR denitrating catalyst;
(b) deashing: SCR denitrating catalyst is purged to the dust of removing surface attachment;
(c) clean: SCR denitrating catalyst is immersed in deionized water or strong acid solution and cleaned until the pH value of deionized water or strong acid solution does not change, take out and be dried to anhydrous drippage;
(d) activation: tend towards stability carrying out priming reaction to its catalytic activity in dried SCR denitrating catalyst immersion activating solution, contain major catalyst salt, co-catalyst salts, rare earth compound and organo-silicon compound in described activating solution;
(e) dry: by carry out SCR denitrating catalyst after priming reaction take out dry after.
Optimally, in described step (a), as the specific area > of SCR denitrating catalyst 25m
2/ g, pore volume > 0.15cm
3/ g, aperture > 25nm, crystal formation are anatase titanium dioxide, As
2o
3mass content≤1% and P
2o
5when mass content≤1%, described SCR denitrating catalyst can be regenerated; As the specific area≤25m of SCR denitrating catalyst
2/ g, pore volume≤0.15cm
3when/g, aperture>=25nm or crystal formation are anatase titanium dioxide, described SCR denitrating catalyst can not be regenerated; As the specific area > of SCR denitrating catalyst 25m
2/ g, pore volume > 0.15cm
3/ g, aperture are less than 25nm and crystal formation is anatase titanium dioxide, and As
2o
3mass content > 1% or P
2o
5when mass content > 1%, described SCR denitrating catalyst can be attempted regeneration.
Further, in described step (d), in activating solution in the concentration ratio SCR denitrating catalyst of major catalyst salt and co-catalyst salts major catalyst and cocatalyst concentration high by 10%～30%.
Further, in described step (d), when the concentration of major catalyst salt in activating solution drop to its original concentration below 10%～20% time, to adding activation stoste in activating solution, the addition V of activation stoste
activation stostecalculate according to formula (1);
In formula, V
activating solution realityrefer to the volume of existing activating solution, C
targetrefer to the aimed concn reaching after activation stoste adds in activating solution, C
stosterefer to the concentration of activation stoste, C
stosterefer to the actual concentrations of existing activating solution.
Further, in step (d), in described activation stoste, major catalyst salt mass concentration is 5%～10%, and co-catalyst salts mass concentration is 5%～10%, rare earth compound mass concentration is 5%～15%, and organo-silicon compound mass concentration is 2%～10%.
Further, in described step (b), before purging SCR denitrating catalyst, first carry out the aspiration of negative pressure with the aspiration of negative pressure car.
Further, in described step (c), cleaning way is air supporting washing or ultrasonic washing, and scavenging period is no more than 20 minutes, and described strong acid solution concentration is 0.3～1.5mol/L.
Further, in described step (d), SCR denitrating catalyst is activated to and returns to the more than 90% of its initial catalytic activity.
Further, in described step (e), employing air at room temperature is placed more than 10 hours after purging and being dried at 10～30 DEG C.
Because technique scheme is used, the present invention compared with prior art has following advantages: the renovation process of SCR denitrating catalyst of the present invention, can realize the regeneration of poisoning or spent catalyst by assessment, deashing, cleaning, activation, drying and other steps, can alleviate operation cost and the environmental pressure of enterprise on the one hand, these steps are simple to operate on the other hand, cost is lower, is suitable for large-scale promotion and uses.
Detailed description of the invention
Below the preferred embodiment of the invention is elaborated:
The renovation process of SCR denitrating catalyst of the present invention, comprises assessment, deashing, cleaning, activation, drying and other steps successively, is specially:
Assessment: not all catalyst poisoning or that lost efficacy all can be regenerated, this has very large relation with SCR denitrating catalyst self physicochemical properties, therefore before starting, deashing dust removal step should detect the outward appearance of SCR denitrating catalyst, physical property, chemical composition, the Possibility of Regeneration (judgement possibility is listed in table 1) of assessment SCR denitrating catalyst, follow-up idle work be can effectively avoid like this, a large amount of time and process costs saved.As can be seen from Table 1, as the specific area > of SCR denitrating catalyst 25m
2/ g, pore volume > 0.15cm
3/ g, aperture < 25nm, crystal formation are anatase titanium dioxide, As
2o
3mass content≤1% and P
2o
5when mass content≤1%, SCR denitrating catalyst can be regenerated; As the specific area≤25m of SCR denitrating catalyst
2/ g, pore volume≤0.15cm
3when/g, aperture>=25nm or crystal formation are anatase titanium dioxide, described SCR denitrating catalyst can not be regenerated; As the specific area > of SCR denitrating catalyst 25m
2/ g, pore volume > 0.15cm
3/ g, aperture are less than 25nm and crystal formation is anatase titanium dioxide, and As
2o
3mass content > 1% or P
2o
5when mass content > 1%, regeneration can be considered or attempt to described SCR denitrating catalyst.Therefore in the time using the renovation process of SCR denitrating catalyst of the present invention, should avoid using specific area≤25m
2/ g, pore volume≤0.15cm
3/ g, aperture>=25nm or crystal formation be anatase titanium dioxide can not regenerated catalyst
Table 1 Possibility of Regeneration decision table
Deashing: sometimes speckle with a large amount of harmful dusts on SCR denitrating catalyst, therefore shift out before reactor at SCR denitrification catalyst module, first use high-power negative pressure vacuum sweeper first to carry out the aspiration of negative pressure, even remove depalletizing flyash and stick not firm dust; SCR denitrating catalyst shifts out after reactor, is placed in dust arrester, utilizes compressed air further to purge SCR denitrating catalyst, removes SCR denitrating catalyst surface dirt, and then carries out follow-up cleaning step.
Clean: the SCR denitrating catalyst after deashing dedusting is selected to the solution (deionized water or 0.3～1.5mol/L strong acid solution, for example poisoning composition As that immerse according to self physicochemical properties
2o
3or P
2o
5when equal size is higher, should select strong acid solution), immersed in the solution of selecting and cleaned until pH value or the electric conductivity of deionized water or strong acid solution do not change.By cleaning treatment, can remove the composition of SCR denitrating catalyst surface adhesion, and relief holes is stopped up, poisoning, the arsenic of alkali metal, phosphorism phenomenon, catalyst activity can return to 70～90% of initial catalytic activity.In the time cleaning, can select air supporting (gentleness) or ultrasonic wave (acutely) mode of washing to carry out; Wash number is too much unsuitable, is no more than at most 3 times, and scavenging period is controlled in 20min; Can certainly be by regulating the methods such as cleaning solution temperature and pH to regulate scavenging period.After cleaning to SCR denitrification catalyst module clean, spray, primary drying operation, spray number of times is controlled at 2～4 cycles; Primary drying adopts air at room temperature to purge form, requires the anhydrous drippage of SCR denitrification catalyst module after primary drying.
Activation: (in activation stoste, major catalyst salt mass concentration is 5%～10% first should to configure activation stoste, co-catalyst salts mass concentration is 5%～10%, rare earth compound mass concentration is 5%～15%, organo-silicon compound mass concentration is 2%～10%), activation stoste should according to different catalyst type select can not composition, such as major catalyst salt can be selected vanadium oxalate, ammonium metavanadate etc., co-catalyst salts can be selected ammonium metatungstate etc., rare earth compound can be selected cerous nitrate etc., and organo-silicon compound can select silicon adhesive etc.; Get subsequently a certain amount of activation stoste add deionized water dilution for activating solution (in activating solution in the concentration ratio SCR denitrating catalyst of major catalyst salt and co-catalyst salts major catalyst and cocatalyst concentration high by 10%～30%, in saving chemical raw material consumption, activating solution still has good activation effect); Then will dried SCR denitrating catalyst immerse and in activating solution, carry out priming reaction and supplement because cleaning the main SCR denitrating catalyst of catalyst surface causing, the loss that helps SCR denitrating catalyst composition, tend towards stability to its catalytic activity, complete activation operation.In order to shorten soak time, SCR denitrating catalyst is activated to and returns to the more than 90% of its initial catalytic activity, and the time should be controlled in 30min.Follow the carrying out of priming reaction, activation solution concentration declines gradually, in the time being reduced to a certain degree, does not just have the effect of activation, therefore just needs to adjust in time the concentration of activating solution; In practical operation, can adopt the concentration of the middle major catalyst salt of XRF on-line real time monitoring activating solution, when its concentration value drop to original concentration below 10%～20% time, should be to adding in activating solution containing the higher activation stoste of major catalyst salinity, the addition V of activation stoste
activation stostecalculate according to formula (1);
In formula, V
activating solution realityrefer to the volume of existing activating solution, C
targetrefer to the aimed concn reaching after activation stoste adds in activating solution, C
stosterefer to the concentration of activation stoste, C
stosterefer to the actual concentrations of existing activating solution.
Dry: adopt air at room temperature purging dry the SCR denitrating catalyst taking-up of carrying out after priming reaction, after redrying finishes, room temperature is placed more than 10 hours, obtains the SCR denitrating catalyst of regeneration.
For the renovation process of SCR denitrating catalyst of the present invention is tested, select waste and old SCR denitrating catalyst to test, its specific performance parameter is listed in table 2 and table 3.
Table 2 is waste and old/fresh catalyst Performance Detection table
Table 3 is waste and old/fresh catalyst chemical composition/Performance Detection table
Embodiment 1
The present embodiment provides a kind of renovation process of SCR denitrating catalyst, from table 2 and table 3, can see that the character such as waste and old SCR denitrating catalyst specific area, pore volume, aperture, crystalloid analysis, in reproducible interval, therefore can apply renovation process.Carry out subsequently deashing dedusting, cleaning, activation, drying steps, its specific operation process is reduced to operation card, lists in table 4.SCR denitrating catalyst after regeneration is carried out to a series of detection, and specific performance parameter is listed in table 5, as can be seen from Table 5, and the SCR denitrating catalyst SO after regeneration
2/ SO
3conversion ratio, the escaping of ammonia rate are all qualified, and specific activity reaches 91%, illustrate that the SCR denitrating catalyst after regeneration has good catalytic activity.
Table 4 operation card
Table 5 regenerated catalyst Performance Detection table
Embodiment 2
The present embodiment provides a kind of renovation process of SCR denitrating catalyst, and identical with embodiment 1 of the SCR denitrating catalyst of regeneration, is reduced to operation card by deashing dedusting, cleaning, activation, drying and other steps, lists in table 6.SCR denitrating catalyst after regeneration is carried out to a series of detection, and specific performance parameter is listed in table 7, as can be seen from Table 7, and the SCR denitrating catalyst SO after regeneration
2/ SO
3conversion ratio, the escaping of ammonia rate are all qualified, and specific activity reaches 92%, illustrate that the SCR denitrating catalyst after regeneration has good catalytic activity.
Table 6 operation card
Table 7 regenerated catalyst Performance Detection table
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (9)
1. a renovation process for SCR denitrating catalyst, is characterized in that, comprises the following steps successively:
(a) assessment: the outward appearance to SCR denitrating catalyst, physical property, chemical composition detect, the Possibility of Regeneration of assessment SCR denitrating catalyst;
(b) deashing: SCR denitrating catalyst is purged to the dust of removing surface attachment;
(c) clean: SCR denitrating catalyst is immersed in deionized water or strong acid solution and cleaned until the pH value of deionized water or strong acid solution does not change, take out and be dried to anhydrous drippage;
(d) activation: tend towards stability carrying out priming reaction to its catalytic activity in dried SCR denitrating catalyst immersion activating solution, contain major catalyst salt, co-catalyst salts, rare earth compound and organo-silicon compound in described activating solution;
(e) dry: by carry out SCR denitrating catalyst after priming reaction take out dry after.
2. the renovation process of SCR denitrating catalyst according to claim 1, is characterized in that: in described step (a), as the specific area > of SCR denitrating catalyst 25m2/g, pore volume > 0.15cm
3/ g, aperture > 25nm, crystal formation are anatase titanium dioxide, As
2o
3mass content≤1% and P
2o
5when mass content≤1%, described SCR denitrating catalyst can be regenerated; As specific area≤25m2/g, the pore volume≤0.15cm of SCR denitrating catalyst
3when/g, aperture>=25nm or crystal formation are anatase titanium dioxide, described SCR denitrating catalyst can not be regenerated; As the specific area > of SCR denitrating catalyst 25m2/g, pore volume > 0.15cm
3/ g, aperture are less than 25nm and crystal formation is anatase titanium dioxide, and As
2o
3mass content > 1% or P
2o
5when mass content > 1%, described SCR denitrating catalyst can be attempted regeneration.
3. the renovation process of SCR denitrating catalyst according to claim 1 and 2, it is characterized in that: in described step (d), in activating solution in the concentration ratio SCR denitrating catalyst of major catalyst salt and co-catalyst salts major catalyst and cocatalyst concentration high by 10% ~ 30%.
4. the renovation process of SCR denitrating catalyst according to claim 1 and 2, it is characterized in that: in described step (d), when the concentration of major catalyst salt in activating solution drop to its original concentration below 10% ~ 20% time, to adding activation stoste in activating solution, the addition V of activation stoste
activation stostecalculate according to formula (1);
（1），
In formula, V
activating solution realityrefer to the volume of existing activating solution, C
targetrefer to the aimed concn reaching after activation stoste adds in activating solution, C
stosterefer to the concentration of activation stoste, C
stosterefer to the actual concentrations of existing activating solution.
5. the renovation process of SCR denitrating catalyst according to claim 4, it is characterized in that: in step (d), in described activation stoste, major catalyst salt mass concentration is 5% ~ 10%, co-catalyst salts mass concentration is 5% ~ 10%, rare earth compound mass concentration is 5% ~ 15%, and organo-silicon compound mass concentration is 2% ~ 10%.
6. the renovation process of SCR denitrating catalyst according to claim 1 and 2, is characterized in that: in described step (b), before purging SCR denitrating catalyst, first carry out the aspiration of negative pressure with the aspiration of negative pressure car.
7. the renovation process of SCR denitrating catalyst according to claim 1 and 2, it is characterized in that: in described step (c), cleaning way is air supporting washing or ultrasonic washing, and scavenging period is no more than 20 minutes, and described strong acid solution concentration is 0.3 ~ 1.5mol/L.
8. the renovation process of SCR denitrating catalyst according to claim 1 and 2, is characterized in that: in described step (d), SCR denitrating catalyst is activated to and returns to the more than 90% of its initial catalytic activity.
9. the renovation process of SCR denitrating catalyst according to claim 1 and 2, is characterized in that: in described step (e), employing air at room temperature is placed more than 10 hours after purging and being dried at 10 ~ 30 DEG C.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667997A (en) * | 2015-01-14 | 2015-06-03 | 北京华电斯莱克顿技术有限公司 | SCR catalyst regeneration method |
| CN104971741A (en) * | 2015-07-10 | 2015-10-14 | 山东海润环保科技有限公司 | Rare earth denitration catalyst recycling method |
| CN105170198A (en) * | 2015-09-21 | 2015-12-23 | 武汉钢铁(集团)公司 | Industrialized regeneration method of SCR plate-type denitration catalyst |
| CN106391144A (en) * | 2016-09-26 | 2017-02-15 | 广东电网有限责任公司电力科学研究院 | Method for regenerating low-carbon denitration catalyst |
| CN107159684A (en) * | 2017-06-29 | 2017-09-15 | 浙江富春江环保热电股份有限公司 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system and method |
| CN108057462A (en) * | 2017-11-17 | 2018-05-22 | 四川大学 | A kind of renovation process of the nonmetallic desulfurizing agent of charcoal base |
| JP2018167169A (en) * | 2017-03-29 | 2018-11-01 | 中国電力株式会社 | Method for recycling denitration catalyst |
| CN112023987A (en) * | 2020-09-15 | 2020-12-04 | 西北矿冶研究院 | Recycling method of deactivated denitration catalyst |
| CN114367196A (en) * | 2021-12-01 | 2022-04-19 | 苏州西热节能环保技术有限公司 | Method for regenerating SCR denitration catalyst by online semidry method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120009894A (en) * | 2010-07-22 | 2012-02-02 | 서울시립대학교 산학협력단 | Regeneration method for activity of spent activated carbon catalyst for selective catalytic reduction |
| CN103464221A (en) * | 2013-09-03 | 2013-12-25 | 广东电网公司电力科学研究院 | SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment and regeneration technology method |
-
2014
- 2014-07-30 CN CN201410369324.2A patent/CN104138771A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120009894A (en) * | 2010-07-22 | 2012-02-02 | 서울시립대학교 산학협력단 | Regeneration method for activity of spent activated carbon catalyst for selective catalytic reduction |
| CN103464221A (en) * | 2013-09-03 | 2013-12-25 | 广东电网公司电力科学研究院 | SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment and regeneration technology method |
Non-Patent Citations (1)
| Title |
|---|
| 张立等: "SCR脱硝催化剂的再生与回收", 《电站辅机》, vol. 33, no. 3, 30 September 2012 (2012-09-30) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667997A (en) * | 2015-01-14 | 2015-06-03 | 北京华电斯莱克顿技术有限公司 | SCR catalyst regeneration method |
| CN104971741A (en) * | 2015-07-10 | 2015-10-14 | 山东海润环保科技有限公司 | Rare earth denitration catalyst recycling method |
| CN105170198A (en) * | 2015-09-21 | 2015-12-23 | 武汉钢铁(集团)公司 | Industrialized regeneration method of SCR plate-type denitration catalyst |
| CN106391144A (en) * | 2016-09-26 | 2017-02-15 | 广东电网有限责任公司电力科学研究院 | Method for regenerating low-carbon denitration catalyst |
| CN106391144B (en) * | 2016-09-26 | 2019-09-24 | 广东电网有限责任公司电力科学研究院 | A kind of low-carbon denitrating catalyst regeneration method |
| JP2018167169A (en) * | 2017-03-29 | 2018-11-01 | 中国電力株式会社 | Method for recycling denitration catalyst |
| CN107159684A (en) * | 2017-06-29 | 2017-09-15 | 浙江富春江环保热电股份有限公司 | Domestic garbage incineration flyash and discarded SCR catalyst coprocessing system and method |
| CN108057462A (en) * | 2017-11-17 | 2018-05-22 | 四川大学 | A kind of renovation process of the nonmetallic desulfurizing agent of charcoal base |
| CN108057462B (en) * | 2017-11-17 | 2020-06-30 | 四川大学 | Regeneration method of carbon-based non-metallic desulfurizer |
| CN112023987A (en) * | 2020-09-15 | 2020-12-04 | 西北矿冶研究院 | Recycling method of deactivated denitration catalyst |
| CN114367196A (en) * | 2021-12-01 | 2022-04-19 | 苏州西热节能环保技术有限公司 | Method for regenerating SCR denitration catalyst by online semidry method |
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