CN107413394A - A kind of renovation process for the SCR denitration that fails - Google Patents
A kind of renovation process for the SCR denitration that fails Download PDFInfo
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- 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
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- 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
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- 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
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
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- 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
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
- B01J38/62—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids organic
Abstract
The invention discloses a kind of renovation process for the SCR denitration that fails, SCR denitration is carried out to the impurity on pretreatment removal surface first, catalyst soak is cleaned in alkaline cleaning fluid afterwards, and auxiliary cleaning mechanically, catalyst after alkali cleaning carries out pickling neutralization, catalyst soak after pickling rinses in deionized water, catalyst after rinsing reaches partially dried effect, dried catalyst impregnates in having sticking active liquid, and catalyst finally is carried out into heat treatment completes regeneration treatment.The present invention realizes the catalyst coating active component content height after regeneration, the low effect of internal layer active component content, more meets the demand of SCR denitration in actual applications；For the activation recovering of regenerated catalyst to more than the 95% of original activity, industrial applications prospect is wide.
Description
Technical field
The present invention relates to denitrating catalyst technical field of regeneration, more particularly to a kind of renovation process for the SCR denitration that fails.
Background technology
On September 21st, 2011, country have newly put into effect standard GB/T 13223-2011《Fossil-fuel power plant atmospheric pollutant emission standard》, it is specified that thermal power generation boiler and gas turbine group discharged nitrous oxides concentration limit value are reduced to 100mg/m3.In this context, the mainstream technology SCR of coal steam-electric plant smoke denitration（SCR）Technology and its key equipment denitrating catalyst industry are developed on a large scale.Counted according to China Electricity Council, by the end of the year 2014, about 6.87 hundred million kilowatts of the coal steam-electric plant smoke denitration unit capacity that put into operation, account for the 75.0% of national fired power generating unit capacity, account for the 83.2% of national coal motor pool-size.Counted according to the desulphurization denitration committee of Environment Protect in China industry association, thermoelectricity SCR denitration unit capacity accounts for the 96.18% of active service unit capacity within 2013.Estimate according to China Electricity Council, there are about 550,000~60 ten thousand stere SCR denitration on-line operations.
SCR denitration can be divided into pellet type catalyst and integral catalyzer according to outward appearance, and integral catalyzer can be divided into honeycomb fashion, board-like and corrugated plate dst catalyst again.Cellular catalyst obtains, entire body is active using catalyst powder as matrix extrusion forming after drying and calcination.Board-like catalyst covers catalyst powder on sheet metal, obtained after drying and calcination using sheet metal as carrier.Corrugated plate dst catalyst coats catalyst slurry using corrugated as carrier on fiberboard, is obtained after drying and calcination.
The problems such as because the optimum activity temperature of such SCR denitration is at 300~400 DEG C, thermal power plant is typically placed between economizer and air preheater, and the flying dust and harmful substance being now faced with flue gas cause catalyst blockage and poisoning.The service life of SCR denitration is generally 3 years, and overdue needs are changed in time.With the propulsion of China's denitration project and the further application of SCR denitration technology, SCR denitration comes into operation on a large scale, will have the SCR denitration largely to fail persistently to produce from now on, and this is by as the great fixed-end forces problem of puzzlement SCR denitration industry.V is mainly contained in SCR denitration2O5, CeO2, ZrO2, WO3, MoO3And TiO2Deng material, such as without dealing carefully with, serious secondary pollution certainly will be caused to environment, while will also result in the loss of metals resources in catalyst.Carry out the regeneration treatment of spent catalyst, realization recycles, extends the service life of SCR denitration, can both reduce the operating cost of denitrating system, can also solve problem of environmental pollution, so as to bring considerable environmental benefit and economic benefit.Therefore, failure SCR denitration regeneration techniques is the study hotspot of domestic and international field of Environment Protection.
The SCR denitration regeneration techniques reported both at home and abroad mainly includes the links such as deashing, Physical Chemical Cleaning, active component implantation and drying and calcining, and active component implantation is the key of regeneration techniques.Nitrogen oxides is not only existed in the use environment of SCR denitration, there is also sulfur dioxide, oxidizing sulfur dioxide is easily causes the corrosion and blocking of equipment after sulfur trioxide, therefore SCR denitration system requires that the denitration efficiency of catalyst is high, while the oxygenation efficiency of sulfur dioxide is low.Because denitration reaction occurs on the top layer of catalyst, oxidizing sulfur dioxide occurs mainly in the internal layer of catalyst, and therefore, the active component content of catalyst coating is high, and it is more preferably distribution that the active component content of internal layer is low.The method that active component implantation is mentioned in patent CN102059156, CN102658215, CN103846112, CN103949290, CN104138771, CN104707482, CN104801182, CN104923316 and CN105170198, but without the demand for distinguishing top layer and internal layer active component load capacity difference.Regarding to the issue above, the present invention surrounds the physicochemical property of SCR denitration, explores the renovation process of failure SCR denitration, realizes catalyst coating and the Optimum distribution of internal layer active component load capacity, rationally effective, the technical scheme of suitable industrialized production is obtained.
The content of the invention
It is an object of the invention to provide a kind of renovation process for the SCR denitration that fails, realize that the active component content of catalyst coating is high, the low Optimum distribution of the active component content of internal layer, more meet the demand of SCR denitration in actual applications.
To achieve these goals, the technical solution adopted by the present invention is：A kind of renovation process for the SCR denitration that fails, specifically includes following steps：
（1）Prepare alkaline cleaning fluid：The surfactant for accounting for alkaline cleaning fluid gross mass 0.01%~1% and the alkaline matter for accounting for alkaline cleaning fluid gross mass 1%~10% are weighed, is dissolved in deionized water, is well mixed, obtains alkaline cleaning fluid；
（2）Prepare the active liquid of viscosity：The water-soluble binder for accounting for the active liquid gross mass 0.01%~5% of viscosity and the active ingredient precursor for accounting for the active liquid gross mass 5%~40% of viscosity are weighed, is dissolved in deionized water, is well mixed, obtains the active liquid of viscosity, the viscosity of the active liquid of viscosity is 0.005~0.1Pas；
（3）SCR denitration is pre-processed, 10~60min of catalyst surface and duct is purged using the high pressure airgun that pressure is 0.1~0.5MPa, removes the impurity loosely adhered on catalyst；
（4）Use the giant rinsing step that pressure is 1~8MPa（3）In catalyst 5~30min of duct, remove catalyst on secure adhesion impurity；
（5）By step（4）In catalyst soak in step（1）In alkaline cleaning fluid in clean 1~3 hour, in cleaning process mechanically auxiliary cleaning 0~3 hour；
（6）By step（5）In catalyst soak cleaned in acidic cleaning solution 0.5~2 hour；
（7）By step（6）In catalyst soak rinse in deionized water 0.5~2 hour；
（8）By step（7）In catalyst take out, 50~90 DEG C dry 0.5~3 hour, now catalyst complete it is partially dried, the moisture evaporation of catalyst coating, the moisture of internal layer does not evaporate；
（9）By step（8）In catalyst soak in step（2）In sticky active liquid in 10~30min, while with bubbling assistant soakage, the gas flow of bubbling is 5~20m3/ h, now sticky active liquid mainly occupy catalyst coating position；
（10）By step（9）In catalyst take out, keep catalyst duct direction parallel to the ground, it is heat-treated at 300~600 DEG C, time is 2~6 hours, remove the moisture on catalyst and adhesive and active ingredient precursor is converted into active component, the SCR denitration after being regenerated is taken out after natural cooling.
Preferably, step（1）Described in surfactant be one kind in anionic surfactant or nonionic surface active agent or any combination of above-mentioned substance.
Preferably, step（1）Described in alkaline matter be one kind in sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, tripropyl amine (TPA) or triethanolamine or any combination of above-mentioned substance.
Preferably, step（2）Described in water-soluble binder be one kind in polyoxyethylene alkenes, polyethylene glycols or cellulose ethers or any combination of above-mentioned substance.
Preferably, step（2）Described in active ingredient precursor be one kind in ammonium metavanadate, vanadic sulfate, vanadyl oxalate, ammonium metatungstate, ammonium paratungstate, ammonium paramolybdate, cerous nitrate, ammonium ceric nitrate, cerous sulfate, zirconium nitrate or zirconium sulfate or above-mentioned substance combination.
Preferably, step（3）Described in SCR denitration pattern be honeycomb fashion, one kind in board-like or corrugated plate dst.
Preferably, step（5）Described in mechanical means be one kind in bubbling, ultrasound or cleaning fluid vibration, and the gas flow of bubbling is 3~20m3/ h, ultrasonic frequency are 10000~50000Hz, and the frequency of cleaning fluid vibration is 20~1000Hz.
Preferably, step（6）Described in the solute of acidic cleaning solution be one kind in sulfuric acid, hydrochloric acid, nitric acid, oxalic acid, formic acid or acetic acid or any combination of above-mentioned substance, and the mass fraction of solute is 0.5%~5% in acidic cleaning solution.
It is an advantage of the invention that：
（One）The present invention realizes the effective cleaning and regeneration to SCR denitration, and the active component content on regenerated catalyst top layer is high, and the active component content of internal layer is low, more meets the demand of SCR denitration in actual applications；
（Two）Catalyst activity after present invention regeneration can return to more than the 95% of original activity, characterize the SO that side reaction oxidizing sulfur dioxide is sulfur trioxide degree2/SO3Conversion ratio can be reduced to less than the 90% of original conversion rate；
（Three）The present invention is applicable not only to vanadium titanium system SCR denitration, and wide suitable for other SCR denitrations, industrial applications prospects such as Rare Earths.
Embodiment
The present invention is described in further detail with reference to embodiment.
Embodiment 1
The failure SCR denitration of the present embodiment is vanadium titanium system honeycomb type denitrification catalyst, and activity is down to the 60% of original activity, a kind of renovation process for the SCR denitration that fails, specifically includes following steps：
（1）Prepare alkaline cleaning fluid：The anionic surfactant for accounting for alkaline cleaning fluid gross mass 0.01% and the sodium hydroxide for accounting for alkaline cleaning fluid gross mass 3% are weighed, is dissolved in deionized water, is well mixed, obtains alkaline cleaning fluid；
（2）Prepare the active liquid of viscosity：The polyethylene glycol oxide for accounting for the active liquid gross mass 0.05% of viscosity and the ammonium metavanadate for accounting for the active liquid gross mass 5% of viscosity are weighed, is dissolved in deionized water, is well mixed, obtains the active liquid of viscosity, the viscosity of the active liquid of viscosity is 0.01Pas；
（3）SCR denitration is pre-processed, catalyst surface and duct 15min is purged using the high pressure airgun that pressure is 0.2MPa, removes the impurity loosely adhered on catalyst；
（4）Use the giant rinsing step that pressure is 1.2MPa（3）In catalyst duct 10min, remove catalyst on secure adhesion impurity；
（5）By step（4）In catalyst soak in step（1）In alkaline cleaning fluid in clean 1 hour, in cleaning process with bubbling auxiliary cleaning 0.5 hour, the gas flow of bubbling is 5m3/h；
（6）By step（5）In catalyst soak mass fraction be 3% sulfuric acid solution in clean 0.5 hour；
（7）By step（6）In catalyst soak rinse in deionized water 1.5 hours；
（8）By step（7）In catalyst take out, 60 DEG C dry 2.5 hours, now catalyst complete it is partially dried, the moisture evaporation of catalyst coating, the moisture of internal layer does not evaporate；
（9）By step（8）In catalyst soak in step（2）In sticky active liquid in 18min, while with bubbling assistant soakage, the gas flow of bubbling is 8m3/ h, now sticky active liquid mainly occupy catalyst coating position；
（10）By step（9）In catalyst take out, keep catalyst duct direction parallel to the ground, be heat-treated at 400 DEG C, the time is 2 hours, remove the moisture on catalyst and adhesive and active ingredient precursor is converted into active component, the SCR denitration after being regenerated is taken out after natural cooling.
In the present embodiment, 98%, SO of the activation recovering of the SCR denitration after regeneration to original activity2/SO3Conversion ratio is reduced to the 85% of original conversion rate.The activity and SO of catalyst2/SO3The detection method of conversion ratio uses standard DL/T 1286-2013《Coal steam-electric plant smoke denitrating catalyst inspection specifications》In method.
Embodiment 2
The failure SCR denitration of the present embodiment is vanadium titanium system plate-type denitration catalyst, and activity is down to the 52% of original activity, a kind of renovation process for the SCR denitration that fails, specifically includes following steps：
（1）Prepare alkaline cleaning fluid：The nonionic surface active agent for accounting for alkaline cleaning fluid gross mass 0.3% and the triethanolamine for accounting for alkaline cleaning fluid gross mass 5% are weighed, is dissolved in deionized water, is well mixed, obtains alkaline cleaning fluid；
（2）Prepare the active liquid of viscosity：The polyethylene glycol for accounting for the active liquid gross mass 1.2% of viscosity and the vanadic sulfate and 3% ammonium metatungstate that account for the active liquid gross mass 6% of viscosity respectively are weighed, is dissolved in deionized water, is well mixed, obtains the active liquid of viscosity, the viscosity of the active liquid of viscosity is 0.008Pas；
（3）SCR denitration is pre-processed, catalyst surface and duct 20min is purged using the high pressure airgun that pressure is 0.4MPa, removes the impurity loosely adhered on catalyst；
（4）Use the giant rinsing step that pressure is 2MPa（3）In catalyst duct 13min, remove catalyst on secure adhesion impurity；
（5）By step（4）In catalyst soak in step（1）In alkaline cleaning fluid in clean 1.5 hours, in cleaning process with ultrasonic wave added clean 1 hour, ultrasonic frequency is 15000Hz；
（6）By step（5）In catalyst soak mass fraction be 4% oxalic acid solution in clean 1 hour；
（7）By step（6）In catalyst soak rinse in deionized water 1 hour；
（8）By step（7）In catalyst take out, 85 DEG C dry 0.5 hour, now catalyst complete it is partially dried, the moisture evaporation of catalyst coating, the moisture of internal layer does not evaporate；
（9）By step（8）In catalyst soak in step（2）In sticky active liquid in 20min, while with bubbling assistant soakage, the gas flow of bubbling is 12m3/ h, now sticky active liquid mainly occupy catalyst coating position；
（10）By step（9）In catalyst take out, keep catalyst duct direction parallel to the ground, be heat-treated at 550 DEG C, the time is 4 hours, remove the moisture on catalyst and adhesive and active ingredient precursor is converted into active component, the SCR denitration after being regenerated is taken out after natural cooling.
In the present embodiment, 96%, SO of the activation recovering of the SCR denitration after regeneration to original activity2/SO3Conversion ratio is reduced to the 87% of original conversion rate.The activity and SO of catalyst2/SO3The detection method of conversion ratio uses standard DL/T 1286-2013《Coal steam-electric plant smoke denitrating catalyst inspection specifications》In method.
Embodiment 3
The failure SCR denitration of the present embodiment is Rare Earth honeycomb type denitrification catalyst, and activity is down to the 45% of original activity, a kind of renovation process for the SCR denitration that fails, specifically includes following steps：
（1）Prepare alkaline cleaning fluid：The nonionic surface active agent for accounting for alkaline cleaning fluid gross mass 0.6% and the potassium carbonate for accounting for alkaline cleaning fluid gross mass 8% are weighed, is dissolved in deionized water, is well mixed, obtains alkaline cleaning fluid；
（2）Prepare the active liquid of viscosity：Weigh the hydroxyethyl cellulose for accounting for the active liquid gross mass 2.5% of viscosity and the ammonium ceric nitrate for accounting for the active liquid gross mass 6% of viscosity respectively, 5% zirconium sulfate and 2% ammonium paratungstate, are dissolved in deionized water, are well mixed, the active liquid of viscosity is obtained, the viscosity of the active liquid of viscosity is 0.04Pas；
（3）SCR denitration is pre-processed, catalyst surface and duct 35min is purged using the high pressure airgun that pressure is 0.5MPa, removes the impurity loosely adhered on catalyst；
（4）Use the giant rinsing step that pressure is 5MPa（3）In catalyst duct 20min, remove catalyst on secure adhesion impurity；
（5）By step（4）In catalyst soak in step（1）In alkaline cleaning fluid in clean 2.5 hours, in cleaning process with cleaning fluid vibrate auxiliary cleaning 2.5 hours, cleaning fluid vibration frequency be 200Hz；
（6）By step（5）In catalyst soak mass fraction be 1% salpeter solution in clean 2 hours；
（7）By step（6）In catalyst soak rinse in deionized water 1.5 hours；
（8）By step（7）In catalyst take out, 80 DEG C dry 2 hours, now catalyst complete it is partially dried, the moisture evaporation of catalyst coating, the moisture of internal layer does not evaporate；
（9）By step（8）In catalyst soak in step（2）In sticky active liquid in 25min, while with bubbling assistant soakage, the gas flow of bubbling is 16m3/ h, now sticky active liquid mainly occupy catalyst coating position；
（10）By step（9）In catalyst take out, keep catalyst duct direction parallel to the ground, be heat-treated at 350 DEG C, the time is 5 hours, remove the moisture on catalyst and adhesive and active ingredient precursor is converted into active component, the SCR denitration after being regenerated is taken out after natural cooling.
In the present embodiment, 99%, SO of the activation recovering of the SCR denitration after regeneration to original activity2/SO3Conversion ratio is reduced to the 89% of original conversion rate.The activity and SO of catalyst2/SO3The detection method of conversion ratio uses standard DL/T 1286-2013《Coal steam-electric plant smoke denitrating catalyst inspection specifications》In method.
Described above is presently preferred embodiments of the present invention, is not intended to limit the invention, and within the spirit and principles of the invention, any modification for being made, equivalent substitution, variations and modifications etc., be should be included within the scope of the present invention.
Claims (8)
- A kind of 1. renovation process for the SCR denitration that fails, it is characterised in that：Methods described comprises the steps of：（1）Prepare alkaline cleaning fluid：The surfactant for accounting for alkaline cleaning fluid gross mass 0.01%~1% and the alkaline matter for accounting for alkaline cleaning fluid gross mass 1%~10% are weighed, is dissolved in deionized water, is well mixed, obtains alkaline cleaning fluid；（2）Prepare the active liquid of viscosity：The water-soluble binder for accounting for the active liquid gross mass 0.01%~5% of viscosity and the active ingredient precursor for accounting for the active liquid gross mass 5%~40% of viscosity are weighed, is dissolved in deionized water, is well mixed, obtains the active liquid of viscosity, the viscosity of the active liquid of viscosity is 0.005~0.1Pas；（3）SCR denitration is pre-processed, 10~60min of catalyst surface and duct is purged using the high pressure airgun that pressure is 0.1~0.5MPa, removes the impurity loosely adhered on catalyst；（4）Use the giant rinsing step that pressure is 1~8MPa（3）5~30min of duct of described catalyst, remove the impurity of secure adhesion on catalyst；（5）By step（4）Described catalyst soak is in step（1）Cleaned 1~3 hour in described alkaline cleaning fluid, auxiliary is cleaned 0~3 hour mechanically in cleaning process；（6）By step（5）Described catalyst soak cleans 0.5~2 hour in acidic cleaning solution；（7）By step（6）Described catalyst soak rinses 0.5~2 hour in deionized water；（8）By step（7）Described catalyst takes out, and is dried at 50~90 DEG C 0.5~3 hour, now catalyst completion is partially dried, and the moisture evaporation of catalyst coating, the moisture of internal layer does not evaporate；（9）By step（8）Described catalyst soak is in step（2）10~30min in described sticky active liquid, while with bubbling assistant soakage, the gas flow of bubbling is 5~20m3/ h, now sticky active liquid mainly occupy catalyst coating position；（10）By step（9）Described catalyst takes out, keep catalyst duct direction parallel to the ground, it is heat-treated at 300~600 DEG C, time is 2~6 hours, remove the moisture on catalyst and adhesive and active ingredient precursor is converted into active component, the SCR denitration after being regenerated is taken out after natural cooling.
- 2. according to the method for claim 1, it is characterised in that：Step（1）Described in surfactant be one kind in anionic surfactant or nonionic surface active agent or any combination of above-mentioned substance.
- 3. according to the method for claim 1, it is characterised in that：Step（1）Described in alkaline matter be one kind in sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, tripropyl amine (TPA) or triethanolamine or any combination of above-mentioned substance.
- 4. according to the method for claim 1, it is characterised in that：Step（2）Described in water-soluble binder be one kind in polyoxyethylene alkenes, polyethylene glycols or cellulose ethers or any combination of above-mentioned substance.
- 5. according to the method for claim 1, it is characterised in that：Step（2）Described in active ingredient precursor be one kind in ammonium metavanadate, vanadic sulfate, vanadyl oxalate, ammonium metatungstate, ammonium paratungstate, ammonium paramolybdate, cerous nitrate, ammonium ceric nitrate, cerous sulfate, zirconium nitrate or zirconium sulfate or above-mentioned substance combination.
- 6. according to the method for claim 1, it is characterised in that：Step（3）Described in SCR denitration pattern be honeycomb fashion, one kind in board-like or corrugated plate dst.
- 7. according to the method for claim 1, it is characterised in that：Step（5）Described in mechanical means be one kind in bubbling, ultrasound or cleaning fluid vibration, and the gas flow of bubbling is 3~20m3/ h, ultrasonic frequency are 10000~50000Hz, and the frequency of cleaning fluid vibration is 20~1000Hz.
- 8. according to the method for claim 1, it is characterised in that：Step（6）Described in the solute of acidic cleaning solution be one kind in sulfuric acid, hydrochloric acid, nitric acid, oxalic acid, formic acid or acetic acid or any combination of above-mentioned substance, and the mass fraction of solute is 0.5%~5% in acidic cleaning solution.
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| CN112680284A (en) * | 2020-12-29 | 2021-04-20 | 苏州西热节能环保技术有限公司 | Catalyst cleaning agent and cleaning method |
| CN113058614A (en) * | 2021-03-31 | 2021-07-02 | 沈阳航空航天大学 | Regeneration method of deactivated flue gas denitration catalyst template |
| CN114214129A (en) * | 2021-12-30 | 2022-03-22 | 陕西环保新能源有限公司 | Cleaning solution for SCR honeycomb denitration catalyst, preparation method and regeneration method |
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| CN108906139A (en) * | 2018-07-03 | 2018-11-30 | 贵州德润环保产业有限公司 | A kind of denitrating catalyst regeneration method |
| CN111234942A (en) * | 2020-01-23 | 2020-06-05 | 苏州西热节能环保技术有限公司 | Cleaning solution, preparation method and application thereof |
| WO2021147625A1 (en) * | 2020-01-23 | 2021-07-29 | 苏州西热节能环保技术有限公司 | Cleaning liquid, preparation method for cleaning liquid and use thereof |
| CN112680284A (en) * | 2020-12-29 | 2021-04-20 | 苏州西热节能环保技术有限公司 | Catalyst cleaning agent and cleaning method |
| CN113058614A (en) * | 2021-03-31 | 2021-07-02 | 沈阳航空航天大学 | Regeneration method of deactivated flue gas denitration catalyst template |
| CN114214129A (en) * | 2021-12-30 | 2022-03-22 | 陕西环保新能源有限公司 | Cleaning solution for SCR honeycomb denitration catalyst, preparation method and regeneration method |
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