CN105797789A - Regeneration method of denitration catalyst - Google Patents

Regeneration method of denitration catalyst Download PDF

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Publication number
CN105797789A
CN105797789A CN201610164439.7A CN201610164439A CN105797789A CN 105797789 A CN105797789 A CN 105797789A CN 201610164439 A CN201610164439 A CN 201610164439A CN 105797789 A CN105797789 A CN 105797789A
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China
Prior art keywords
catalyst
spent catalyst
renovation
spent
stage
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CN201610164439.7A
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Chinese (zh)
Inventor
王璐
刘雪松
田丹女
王斌
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浙江海亮环境材料有限公司
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Priority to CN201610164439.7A priority Critical patent/CN105797789A/en
Publication of CN105797789A publication Critical patent/CN105797789A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • 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
    • B01J38/02—Heat treatment
    • 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
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/64—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts
    • 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
    • B01J38/64—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts
    • B01J38/66—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts using ammonia or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

The invention relates to a regeneration method of a denitration catalyst. The problem that a wasted catalyst is not high in utilization rate is solved. The method includes the following steps of firstly, the preprocessing stage, wherein regeneration liquid is prepared in a soaking tank and includes a vanadyl oxalate solution, an ammonium metatungstate solution and a silicon adhesive or includes a vanadyl oxalate solution, an ammonium paratungstate solution and a silicon adhesive; secondly, the dust removal stage, wherein dust on surfaces and in pores of the wasted catalyst is removed; thirdly, the activating stage, wherein the wasted catalyst where dust has already been removed in the second step is soaked in the regeneration liquid so that the activity of the catalyst can be improved; fourthly, the drying stage, wherein water on surfaces and in pores of the catalyst activated in the third step is removed.

Description

A kind of renovation process of denitrating catalyst

Technical field

The present invention relates to the renovation process of a kind of denitrating catalyst.

Background technology

Along with national economy sustained and rapid development and total energy consumption are unprecedented soaring, China's nitrogen oxide emission increases rapidly.Equal statistics, within 2000, national NOx discharge is 11,770,000 tons, and 2010 up to 2273.6 ten thousand tons.If not taking control measure, it is contemplated that be up to 30,000,000 tons to the year two thousand twenty NOx emission total amount, China will become the country that NOx discharge ranks first in the world when the time comes.

What current gas denitrifying technology was most widely used is SNCR technology (SNCR) and selective catalytic reduction reaction technology (SCR).Wherein SCR technique is owing to reaction temperature is low, denitration efficiency is high, uses extensively in industries such as thermoelectricity, iron and steel, cement.In SCR system, denitrating catalyst is important component part, and its performance directly influences the overall denitration effect of SCR system.SCR catalyst activity in actual use can be gradually reduced, and when its activity decrease extremely can not meet the requirement of SCR system entirety denitration performance, it is necessary to more catalyst changeout, within general 3～5 years, is accomplished by changing.Denitrating catalyst is also a part relatively costly in whole process equipment, and the displacement expense of SCR catalyst accounts for the 50% of SCR system total price.Inactivation SCR catalyst is regenerated, it is possible to increase or the activity of recovery decaying catalyst, enable decaying catalyst to be re-used.Regeneration expense only accounts for all changes the 20%～30% of catalyst costs.Regeneration can also save the expense processing discarded SCR catalyst.The regeneration of visible SCR catalyst is for reducing the operating cost of SCR system, and the economy improving SCR gas denitrifying technology has important practical significance.According to statistics, within 2014, Zhejiang Province's denitrating catalyst annual requirement is about 4.0 ten thousand steres, calculates 3 years service life by catalyst, often has about 4 ten thousand stere denitrating catalysts to need to process after 3 years.Except thermal power project, iron and steel, cement, glass kiln, industrial furnace etc. are also had to need to use the equipment of SCR denitration, it is estimated, SCR denitration on the equipment such as iron and steel, cement, glass kiln, industrial furnace uses total amount to be about about the 50% of thermoelectricity, and therefore only Zhejiang Province needs SCR denitration to be processed more than 6 ten thousand steres every year.If these discarded SCR denitration catalytic units can not get effective process, easily soil and groundwater is polluted, even ecological environment and health are produced serious harm, be also unfavorable for recycling of resource.

National environmental protection portion " thermal power plant's nitrogen oxides technological policy for treatment " (environment-development [2010] 10) clearly proposes: decaying catalyst should preferentially carry out Regeneration Treatment, what cannot regenerate should carry out harmless treatment, encouraging the regeneration of low-cost and high-performance catalyst raw material, new catalyst and decaying catalyst and the development and application of safe disposal technology, inactivation and non-renewable catalyst should be processed, in strict accordance with National Hazard refuse, the relevant regulations disposed and be managed by power plant.Instruction in " suggestion about accelerating development energy-conserving and environment-protective industry " (promulgated by the State Council (2013) 30) that in August, 2013, State Council put into effect " greatly develops denitrating catalyst preparation and regeneration, resource desulfurization technical equipment; accelerate development SCR technology and SNCR technology and equipment thereof ", propose specific direction from the preparation to denitrating catalyst of the policy aspect and regeneration, the fast development in denitrating catalyst regeneration market is greatly facilitated.

But, the utilization rate of existing spent catalyst is low.

Summary of the invention

Problem to be solved by this invention is just to provide the renovation process of a kind of denitrating catalyst, to improve the utilization rate of spent catalyst.

For solving the problems referred to above, the present invention provides following technical scheme:

The renovation process of a kind of denitrating catalyst, comprises the steps:

1) pretreatment stage, prepares regenerated liquid in soaking box, and described regenerated liquid includes vanadyl oxalate solution, ammonium metatungstate solution and silicon adhesive, or described regenerated liquid includes vanadyl oxalate solution, secondary tungsten acid ammonium solution and silicon adhesive；

2) the dedusting stage, the dust in spent catalyst surface and duct is removed；

3) activation stage, by step 2) in the spent catalyst of dedusting be immersed in regenerated liquid, to improve the activity of catalyst；

4) drying stage, removing step 3) in the water in activating catalytic agent surface and duct.

The renovation process of denitrating catalyst of the present invention includes regenerated liquid, regenerated liquid includes vanadyl oxalate solution, ammonium metatungstate solution and silicon adhesive, or described regenerated liquid includes vanadyl oxalate solution, secondary tungsten acid ammonium solution and silicon adhesive, the spent catalyst of 80% can activate in regenerated liquid, thus realize spent catalyst again with.It is so designed that, improves the utilization rate of spent catalyst, according to calculating, 1m3Regeneration catalyzing agent and new production 1m3Catalyst compare reduction by 95% energy consumption, and reduce vanadium, titanium, tungsten 80% make consumption.

Additionally, the regeneration techniques of spent catalyst includes hot recycling, pickling regeneration and washing regeneration, owing to hot recycling has the shortcoming that energy consumption is big, pickling regeneration has the corrosion-prone shortcoming of equipment, and therefore, spent catalyst of the present invention adopts washing regeneration.Being so designed that, under meeting the premise of regenerability and regeneration rate, the production technology of spent catalyst cleaning, rationally, the garbage produced in regenerative process is disposable.

Further, described silicon adhesive includes silicon dioxide, nitric acid and ethanol, or described silicon adhesive includes silicon dioxide, hydrochloric acid and ethanol.It is so designed that, improves spent catalyst amount of activity recovery in regenerated liquid.

Further, the dedusting stage comprises the steps:

Purge: spent catalyst is purged by compression air；

Clean: the spent catalyst completing to purge operation is immersed in cleanout fluid.It is so designed that, reduces the amount of dust in spent catalyst surface and duct.

Further, described cleanout fluid includes ethanedioic acid, ethylenediaminetetraacetic acid and fatty alcohol-polyoxyethylene ether, or described fine purifiation liquid includes ethanedioic acid, disodiumedetate and fatty alcohol-polyoxyethylene ether, or described fine purifiation liquid includes ethanedioic acid, ethylenediaminetetraacetic acid and alkylphenol polyoxyethylene, or described fine purifiation liquid includes ethanedioic acid, disodiumedetate and alkylphenol polyoxyethylene.It is so designed that, strengthens cleanout fluid and clean the effect of dust in spent catalyst duct.

Further, spent catalyst through common cleaning, saline pressure pulse cleaning and high pressure cleaning showers, must add cleanout fluid in matting in the washings that common cleaning uses.It is so designed that, further enhances cleanout fluid and clean the effect of dust in spent catalyst duct.

Further, saline pressure pulse cleaning carries out in soaking box, and described soaking box includes bubbler and bubble flow device.Being so designed that, bubbly flow device increases the range of movement of bubble in soaking box.

Further, step 3) in non-activated spent catalyst include processing as follows step:

Dry: to reduce step 3) in the water content of non-activated spent catalyst；

Ultrafine Grinding: dried spent catalyst is ground to form the powder of 200 order-500 orders；

Calcining: calcining spent catalyst powder in the calciner adding soda.

The service life of catalyst is generally 3 years, catalyst comprises noxious substance vanadic anhydride, substantial amounts of heavy metal element in the Catalyst Adsorption power-plant flue gas that power plant uses, and such as hydrargyrum, arsenic etc., therefore, spent catalyst cannot outdoor placement or directly recycle.The conventional method of disposal of existing spent catalyst is landfill disposal, and in the U.S., spent catalyst must process in the danger wastes landfill disposal factory secured permission；In Japan, spent catalyst after crushing, is encapsulated in concrete, and by specialty, fixed-end forces company processes at landfill yard.Thus it is seen that, existing spent catalyst does not simply fail to utilizing, and cost of disposal is high.

In the present invention, non-activated spent catalyst is after super-dry, particle, Ultrafine Grinding and calcining, and spent catalyst decomposable asymmetric choice net produces anatase thpe white powder, ammonium paratungstate and vanadic anhydride, wherein, and TiO in anatase thpe white powder2Content can reach about 90%, TiO2The response rate nearly 90%；WO in ammonium paratungstate3Content can reach more than 99%, WO3The response rate can reach more than 80%；V in vanadic anhydride2O5Content can reach 93%, V2O5The response rate can reach more than 60%.

Further, step 4) in spent catalyst powder calcining heat in calciner be 700 DEG C-750 DEG C, calcination time is 3h-4h.Being so designed that, spent catalyst powder will form the granule of 2mm to 20mm after firing.

Further, described calciner is electrical heating rotary kiln.

Accompanying drawing explanation

Fig. 1 is the flow chart of the renovation process of denitrating catalyst in the preferred embodiment of the present invention.

Detailed description of the invention

With reference to Fig. 1, the renovation process of a kind of denitrating catalyst, comprise the steps:

1) pretreatment stage, prepares regenerated liquid in soaking box, and described regenerated liquid includes vanadyl oxalate solution, ammonium metatungstate solution and silicon adhesive, or described regenerated liquid includes vanadyl oxalate solution, secondary tungsten acid ammonium solution and silicon adhesive；

2) the dedusting stage, the dust in spent catalyst surface and duct is removed；

3) activation stage, by step 2) in the spent catalyst of dedusting be immersed in regenerated liquid, to improve the activity of catalyst；

4) drying stage, removing step 3) in the water in activating catalytic agent surface and duct.

In the present embodiment, silicon adhesive includes silicon dioxide, nitric acid and ethanol, or described silicon adhesive includes silicon dioxide, hydrochloric acid and ethanol.

Spent catalyst is generally divided into two classes: 1, catalyst lost efficacy due to surface and the full dust of duct inner product；2, catalyst lost efficacy due to flyash impact, thermodynamic activity generation sintering.Adding up according to power plant, the failure cause of 80% spent catalyst is to lose efficacy due to catalyst surface and the full dust of duct inner product, and the catalyst lost efficacy because of catalyst surface and the full dust of duct inner product can pass through the renovation process activity recovery of denitrating catalyst；The failure cause remaining 20% spent catalyst is that the catalyst occurring to sinter because of flyash impact, thermodynamic activity and losing efficacy cannot by the renovation process activity recovery of denitrating catalyst owing to flyash impact, thermodynamic activity occur sintering to lose efficacy.Therefore, for avoiding waste regenerated liquid, spent catalyst needs to carry out outward appearance, composition, crystalline condition and performance evaluation before the dedusting stage, to judge whether spent catalyst meets regeneration condition.

In the present embodiment, the dedusting stage comprises the steps:

Purge: spent catalyst is purged by compression air；

Clean: the spent catalyst completing to purge operation is immersed in cleanout fluid.

Arranging purging case in deashing workshop, purging case is both ends open, middle airtight square tubular structure, purges in case by spent catalyst placement, with compression air, the dust of blocking in its surface and duct is purged removing.Purging room and have 4 nozzles, can purge 4 spent catalysts simultaneously, each spent catalyst is about 1.6m3, purge time is about 40min, processes 24 spent catalysts every day and is about 50m3If processing 24 spent catalysts every day and being about 50m3, then, the amount of annual activating catalytic agent will be greater than 12000m3.Purging operation has dust waste gas to produce, and arranges negative pressure gas skirt purging case afterbody, and dust-laden exhaust gas is pumped to discharge after bag-type dust collector processes, and bag-type dust collector includes 1 1800～2300Nm3The air exhauster of/h.

Spent catalyst will be carried out operation after completing purging operation, and spent catalyst through common cleaning, saline pressure pulse cleaning and high pressure cleaning showers, must add cleanout fluid in matting in the washings that common cleaning uses.In the present embodiment, common cleaning performs twice at, and in first time common cleaning process, often cleans two spent catalysts and just changes once washing water；In the common cleaning process of second time, often clean four spent catalysts and just change once washing water；In saline pressure pulse cleaning process, often clean four spent catalysts and just change once washing water；In high pressure cleaning showers process, the drip washing box for depositing washings often sprays 15min and just supplements once washing water.In other embodiments of the invention, the dedusting stage can only include matting.

Use it should be understood that the washings in matting filter Posterior circle, to avoid the noxious substance in dust to dissipate with dust, it means that matting can be collected and harmless treatment dust.

In the present embodiment, cleanout fluid recycles through reverse osmosis membrane filtration device.

It is also preferred that the left saline pressure pulse cleaning carries out in soaking box, described soaking box includes bubbler and bubble flow device.

In the present embodiment, regenerated liquid is that spent catalyst supplements vanadium, tungsten and titanium, to realize spent catalyst activity recovery again.In regenerated liquid, the degree of each component can be allocated according to spent catalyst, and therefore, the concrete percentage ratio of component each in regenerated liquid is not limited by the present embodiment.

In the present embodiment, the catalyst after regenerated liquid activates is put in drying baker, and drying baker adopts electrical heating, dries temperature and controls at about 50 DEG C, and drying time is about 30min, to realize removing the water in activating catalytic agent surface and duct.In other embodiments of the invention, the water natural air drying in activating catalytic agent surface and duct is also feasible.

It is also preferred that the left the agent of activating catalytic dried by drying baker is deposited in spacious place 8h, to avoid activating catalytic agent surface to have water recovery.

In the present embodiment, step 3) in non-activated spent catalyst include processing as follows step:

Dry: to reduce step 3) in the water content of non-activated spent catalyst；

Ultrafine Grinding: dried spent catalyst is ground to form the powder of 200 order-500 orders；

Calcining: calcining spent catalyst powder in the calciner adding soda.

Partial failure catalyst is placed in metal module and is sequentially carried out dedusting, activation and dries, and therefore, this partial failure catalyst is failing to activation, then technical staff needs first to cut metal module, could be taken out from metal module by non-activated spent catalyst.In other embodiments of the invention, metal module is if removable, then technical staff is without cutting metal module, just can be taken out from metal module by non-activated spent catalyst.

When non-activated spent catalyst needs separating tungsten, vanadium and titanium after the drying, non-activated spent catalyst need to carry out Ultrafine Grinding, until it grinds to form the powder of 200 orders；When non-activated spent catalyst needs to add in catalyst production process after the drying, non-activated spent catalyst need to carry out Ultrafine Grinding, until it grinds to form the powder of 500 orders.

It is also preferred that the left non-activated spent catalyst is in micro-wet state after the drying, the noxious substance in spent catalyst so can be avoided to dissipate with dust.

In the present embodiment, non-activated spent catalyst carries out in Ultrafine Grinding workshop, and Ultrafine Grinding workshop sets 6m × 12m × 4m and closes between pulverizing, and non-activated spent catalyst is conveyed into Ultrafine Grinding workshop by belt, Ultrafine Grinding workshop is provided with blower fan, and fan design air quantity is 12000m3/ h, the charging aperture closed between pulverizing is micro-vacuum state, and charging aperture wind speed is about 0.55m/s, to ensure that the spent catalyst dust closing in pulverizing does not dissipate from charging aperture.Fan outlet arranges bag-type dust collector, and waste gas enters air after bag-type dust collector processes.

In the present embodiment, step 4) in spent catalyst powder calcining heat in calciner be 700 DEG C-750 DEG C, calcination time is 3h-4h.The calcining of spent catalyst powder forms the granule of 2mm to 20mm, and this granule can entrust other enterprises to carry out the separation of tungsten, vanadium and titanium.

In the present embodiment, described calciner is electrical heating rotary kiln, and electrical heating rotary kiln processes spent catalyst powder 35kg per hour, and every day, 24h continuously ran, and year works 323 days.In other embodiments of the invention, calciner can also be calcining furnace.

The above, be only the specific embodiment of the present invention, but protection scope of the present invention be not limited thereto, and those of ordinary skill in the art should be understood that the present invention includes but not limited to accompanying drawing and content described in detailed description of the invention above.The function of any present invention of not necessarily departing from and the amendment of structural principle are intended to be included in the scope of claims.

Claims (9)

1. the renovation process of a denitrating catalyst, it is characterised in that comprise the steps:
1) pretreatment stage, prepares regenerated liquid in soaking box, and described regenerated liquid includes vanadyl oxalate solution, ammonium metatungstate solution and silicon adhesive, or described regenerated liquid includes vanadyl oxalate solution, secondary tungsten acid ammonium solution and silicon adhesive；
2) the dedusting stage, the dust in spent catalyst surface and duct is removed；
3) activation stage, by step 2) in the spent catalyst of dedusting be immersed in regenerated liquid, to improve the activity of catalyst；
4) drying stage, removing step 3) in the water in activating catalytic agent surface and duct.
2. the renovation process of denitrating catalyst as claimed in claim 1, it is characterised in that described silicon adhesive includes silicon dioxide, nitric acid and ethanol, or described silicon adhesive includes silicon dioxide, hydrochloric acid and ethanol.
3. the renovation process of denitrating catalyst as claimed in claim 1, it is characterised in that the dedusting stage comprises the steps:
Purge: spent catalyst is purged by compression air；
Clean: the spent catalyst completing to purge operation is immersed in cleanout fluid.
4. the renovation process of denitrating catalyst as claimed in claim 3, it is characterized in that, described cleanout fluid includes ethanedioic acid, ethylenediaminetetraacetic acid and fatty alcohol-polyoxyethylene ether, or described fine purifiation liquid includes ethanedioic acid, disodiumedetate and fatty alcohol-polyoxyethylene ether, or described fine purifiation liquid includes ethanedioic acid, ethylenediaminetetraacetic acid and alkylphenol polyoxyethylene, or described fine purifiation liquid includes ethanedioic acid, disodiumedetate and alkylphenol polyoxyethylene.
5. the renovation process of denitrating catalyst as claimed in claim 3, it is characterised in that spent catalyst through common cleaning, saline pressure pulse cleaning and high pressure cleaning showers, must add cleanout fluid in matting in the washings that common cleaning uses.
6. the renovation process of denitrating catalyst as described in one of claim 1 to 5, it is characterised in that saline pressure pulse cleaning carries out in soaking box, described soaking box includes bubbler and bubble flow device.
7. the renovation process of denitrating catalyst as described in one of claim 1 to 5, it is characterised in that step 3) in non-activated spent catalyst include processing as follows step:
Dry: to reduce step 3) in the water content of non-activated spent catalyst；
Ultrafine Grinding: dried spent catalyst is ground to form the powder of 200 order-500 orders；
Calcining: calcining spent catalyst powder in the calciner adding soda.
8. the renovation process of as claimed in claim 7 denitrating catalyst, it is characterised in that step 4) in spent catalyst powder calcining heat in calciner be 700 DEG C-750 DEG C, calcination time is 3h-4h.
9. the renovation process of denitrating catalyst as claimed in claim 7, it is characterised in that described calciner is electrical heating rotary kiln.
CN201610164439.7A 2016-03-22 2016-03-22 Regeneration method of denitration catalyst CN105797789A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107570137A (en) * 2016-11-21 2018-01-12 广西大学 A kind of method that auto-exhaust catalyst is prepared using ceria base
CN107961818A (en) * 2017-12-06 2018-04-27 南京威安新材料科技有限公司 The renovation process and production equipment of flue gas SCR catalyst
CN109507365A (en) * 2019-01-08 2019-03-22 苏州西热节能环保技术有限公司 A method of measurement SCR catalyst regeneration content of vanadium in load liquid

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CN101332431A (en) * 2007-06-26 2008-12-31 韩国电力公社 Method of recycling spent flue gas denitration catalyst and method of determining washing time of spent flue gas denitration catalyst
CN102266723A (en) * 2011-07-20 2011-12-07 浙江大学 Regenerating method and regenerating device for selective catalytic reduction de-nitration catalyst
CN203737259U (en) * 2014-04-08 2014-07-30 苏州华瑞能泰发电技术有限公司 Test stand for SCR catalyst regeneration
CN103949291A (en) * 2014-04-23 2014-07-30 江苏万德环保科技有限公司 Denitration catalyst regeneration solution and preparation method thereof as well as catalyst regeneration method
CN104128212A (en) * 2014-08-01 2014-11-05 焦占付 SCR (selective catalytic reduction) denitration catalyst deactivation repair agent and inactivation regeneration process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101332431A (en) * 2007-06-26 2008-12-31 韩国电力公社 Method of recycling spent flue gas denitration catalyst and method of determining washing time of spent flue gas denitration catalyst
CN102266723A (en) * 2011-07-20 2011-12-07 浙江大学 Regenerating method and regenerating device for selective catalytic reduction de-nitration catalyst
CN203737259U (en) * 2014-04-08 2014-07-30 苏州华瑞能泰发电技术有限公司 Test stand for SCR catalyst regeneration
CN103949291A (en) * 2014-04-23 2014-07-30 江苏万德环保科技有限公司 Denitration catalyst regeneration solution and preparation method thereof as well as catalyst regeneration method
CN104128212A (en) * 2014-08-01 2014-11-05 焦占付 SCR (selective catalytic reduction) denitration catalyst deactivation repair agent and inactivation regeneration process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107570137A (en) * 2016-11-21 2018-01-12 广西大学 A kind of method that auto-exhaust catalyst is prepared using ceria base
CN107961818A (en) * 2017-12-06 2018-04-27 南京威安新材料科技有限公司 The renovation process and production equipment of flue gas SCR catalyst
CN109507365A (en) * 2019-01-08 2019-03-22 苏州西热节能环保技术有限公司 A method of measurement SCR catalyst regeneration content of vanadium in load liquid

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