CN105396626A - Regeneration liquid of SCR denitration catalyst and regeneration method of SCR denitration catalyst - Google Patents
Regeneration liquid of SCR denitration catalyst and regeneration method of SCR denitration catalyst Download PDFInfo
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- CN105396626A CN105396626A CN201410456853.6A CN201410456853A CN105396626A CN 105396626 A CN105396626 A CN 105396626A CN 201410456853 A CN201410456853 A CN 201410456853A CN 105396626 A CN105396626 A CN 105396626A
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Abstract
The invention provides a regeneration liquid of an SCR denitration catalyst. The regeneration liquid is composed of a cleaning fluid and an activity recovering liquid. The formula of the cleaning fluid comprises: 0.01-2 wt% of ammonium bifluoride, 0.1-10 wt% of phosphoric acid, 0.01-2 wt% of ethylenediamine tetraacetic acid, 0.1-10 wt% of citric acid, 0.01-2 wt% of OP-10, and an equilibrium amount of water. The formula of the activity recovering liquid comprises: 0.1-10 wt% of vanadyl sulfate, 0.1-10 wt% of ammonium metatungstate, 0.1-5 wt% of ammonium molybdate, 0.1-10 wt% of ammonium sulfate, and an equilibrium amount of water. The invention further provides a regeneration method of the SCR denitration catalyst through utilization of the regeneration liquid.
Description
Technical field
The invention belongs to filed of flue gas purification, relate to the renovation process of a kind of SCR denitration regenerated liquid and a kind of SCR denitration.
Background technology
Nitrogen oxide (NOx) is one of major pollutants of air.Thermal power plant is the maximum emission source of China's nitrogen oxide, accounts for 30% ~ 40% of national discharged nitrous oxides total amount.Therefore, in order to reduce the discharge of nitrogen oxide, improve the ecological environmental pollution problem that China is increasingly serious, the emission control of the nitrogen oxides in effluent that thermal power plant produces is extremely urgent.
" fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) that national environmental protection portion promulgated in September, 2011, requires from 1 day January in 2012, and all newly-built fired power generating unit NOx discharge must not more than 100mg/m
3; From 1 day January in 2014, all thermoelectricitys in the key area unit NOx discharge that puts into operation reached 100mg/m
3, the unit gone into operation in non-key area for 2003 in the past reaches 200mg/m
3, this proposes strict emission standards to coal steam-electric plant smoke denitration.
According to statistics, domestic selective catalytic reduction reaction (SelectiveCatalyticReduction is called for short " SCR ") denitrating catalyst demand is about 200,000 m
3/ a, calculates according to regeneration 2/3, and reproducible catalyst total amount is approximately 140,000 m
3about/a.The regeneration cost of SCR denitration is estimated to can be controlled within 1.5 ten thousand yuan/cubic metre, compares, can be the expense that thermal power plant saves about 2,100,000,000 yuan with replacing raw catelyst.
Commercial SCR denitration the most frequently used is at present V
2o
5-WO
3-(MoO
3)/TiO
2system, this catalyst life is generally 2 ~ 4 years, needs to change after 2 ~ 4 years.To changing rear discarded denitrating catalyst, needing to carry out special harmless treatment, regularly processing to the hazard waste landfill treatment plant secured permission.The landfill disposal of discarded SCR denitration, although avoid environmental hazard, the precious metals such as titanium wherein, tungsten, vanadium could not be recycled utilization, cause resource huge waste.Rear recycling is regenerated to inactivation SCR denitration catalyst, both can solve potential problem of environmental pollution, considerable economy and environment benefit can be brought again.Therefore, the regeneration of SCR denitration is the only way of denitration industry development.
200910031206.X Chinese patent application discloses a kind of SCR denitration regenerated liquid, and this regenerated liquid comprises penetration enhancer JFC, Surfactant OP-10, peregal, ammonium metavanadate, ammonium paratungstate, ammonium paramolybdate, water and acid.Use regenerated liquid disclosed in this patent application can carry out supplementing to reach the object improving catalyst activity to the active component of catalyst, but be used alone this regenerated liquid and there is the problem that can not repeatedly reuse, a large amount of discharge containing heavy metal wastewater therebies such as vanadium may be caused on the one hand, the wasting of resources of the precious metal such as tungsten, molybdenum can be caused on the other hand.
No. 200510117054.7 Chinese patent application discloses a kind of renovation process adopting the honeycomb type SCR catalyst of bubbly flow device, and the regenerative mixed liquid provided in this patent application mainly comprises: sulfuric acid, ammonium metavanadate and ammonium paratungstate.But this regenerative mixed liquid only has good cleaning and regeneration effect to alkali metal (Na, K) and alkaline-earth metal (Mg, Ca) or its compound.And it is a lot of to cause the factor of catalysqt deactivation to also have, such as, arsenic poisoning, calcium sulfate and scale of silica covering etc.
Specifically, cause the reason of SCR denitration inactivation mainly to comprise: the blocking on (1) duct or surface or covering, to result in blockage or the main component that covers is dust constituent such as sulfureous in flue gas acid calcium, silica etc.; (2) alkalinous metal (such as, Na, K, Mg, Ca etc.) and heavy metal (As etc.) are in catalyst surface enrichment, be combined thus cause catalysqt deactivation with active sites; And (3) catalyst abrasion and sintering etc.
Therefore, still need to provide and go for many reasons and cause the SCR denitration regenerated liquid of SCR denitration inactivation and the renovation process of SCR denitration.
Summary of the invention
Therefore, the object of this invention is to provide and a kind ofly can regenerate the SCR denitration regenerated liquid of the SCR denitration inactivation that many reasons causes and the renovation process of SCR denitration simultaneously.The renovation process of SCR denitration regenerated liquid of the present invention and SCR denitration is except except high efficient recovery catalyst activity, also can reducing the generation of waste water significantly, reduce the pollution to environment.
The object of the invention is to be achieved through the following technical solutions.
On the one hand, the invention provides a kind of SCR denitration regenerated liquid, described regenerated liquid is made up of cleaning fluid and activation recovering liquid, wherein, the formula of described cleaning fluid is: the water of the ethylenediamine tetra-acetic acid of the ammonium acid fluoride of 0.01 ~ 2wt%, the phosphoric acid of 0.1 ~ 10wt%, 0.01 ~ 2wt%, the citric acid of 0.1 ~ 10wt%, the OP-10 of 0.01 ~ 2wt% and aequum, the formula of described activation recovering liquid is: the vanadic sulfate of 0.1 ~ 10wt%, the ammonium metatungstate of 0.1 ~ 10wt%, 0.1 ~ 5wt% ammonium molybdate, the ammonium sulfate of 0.1 ~ 10wt% and the water of aequum.
Do not wish, by theoretical restriction, to think, in cleaning fluid of the present invention, the combination of ammonium acid fluoride and ethylenediamine tetra-acetic acid effectively can be removed the dirt such as silica, calcium sulfate in blocking or covering catalyst surface and duct; Simultaneously under the acting in conjunction of phosphoric acid and all the other components, also can effectively remove arsenic poisoning material.
According to SCR denitration regenerated liquid provided by the invention, wherein, described cleaning fluid formula is: the water of the ethylenediamine tetra-acetic acid of the ammonium acid fluoride of 0.1 ~ 2wt%, the phosphoric acid of 1 ~ 10wt%, 0.05 ~ 2wt%, the citric acid of 1 ~ 10wt%, the OP-10 of 0.05 ~ 2wt% and aequum.
According to SCR denitration regenerated liquid provided by the invention, wherein, described activation recovering liquid consists of: the vanadic sulfate of 1 ~ 5wt%, the ammonium metatungstate of 1 ~ 10wt%, 1 ~ 5wt% ammonium molybdate, the ammonium sulfate of 1 ~ 5wt% and the water of aequum.
On the other hand, present invention also offers the method utilizing described SCR denitration regenerated liquid to regenerate SCR denitration, said method comprising the steps of:
(1) SCR denitration to be regenerated is placed in described cleaning fluid to clean, the catalyst after cleaning is carried out rinsing and/or rinsing, then dry;
(2) the dried catalyst obtained in step (1) is immersed in described activation recovering liquid carry out activation recovering; With
(3) catalyst after activation recovering is heat-treated, obtain regenerating denitrating catalyst.
According to method provided by the invention, wherein, described in step (1), cleaning operation comprises: SCR denitration to be regenerated is placed in described cleaning fluid and soaks, then carry out Ultrasonic Cleaning and/or pressure pulse cleaning.
According to method provided by the invention, wherein, the cleaning operation described in step (1) carries out in the service sink with supersonic generator and/or bubbling device.
According to method provided by the invention, wherein, in step (1), SCR denitration to be regenerated is placed in the time that described cleaning fluid soaks is 10 ~ 300 minutes, is preferably 30 ~ 200 minutes.
According to method provided by the invention, wherein, be adopt deionized water to rinse and/or rinsing the catalyst after cleaning in step (1).
According to method provided by the invention, wherein, drying described in step (1) is carried out at 100 ~ 120 DEG C, and the dry time is 1 ~ 3 hour.
According to method provided by the invention, wherein, the time of Ultrasonic Cleaning and/or pressure pulse cleaning described in step (1) is 10 ~ 60 minutes, is preferably 10 ~ 40 minutes.
According to method provided by the invention, wherein, described in step (2), activation recovering carries out in impregnating bath.
According to method provided by the invention, wherein, in step (2), dried catalyst immerses the time of carrying out activation recovering in described activation recovering liquid is 10 ~ 120 minutes, is preferably 10 ~ 60 minutes.
According to method provided by the invention, wherein, described in step (3), heat treatment carries out 1 ~ 24 hour at 60 ~ 300 DEG C.Such as, described heat treatment is carried out at 80 ~ 120 DEG C.
The method of SCR denitration regenerated liquid of the present invention and regeneration SCR denitration has the following advantages:
(1) cleaning fluid can effectively remove the various dirt in SCR denitration surface (such as simultaneously, SCR denitration is caused to cover or blocking and the silica of inactivation, calcium sulfate) and multiple catalysts poisoning (such as, alkalinous metal and heavy metal arsenic poisoning) material;
(2) the present invention provides cleaning fluid and activation recovering liquid individually, and do not mixed, although the step of adding but have the following advantages: containing the vanadium class noxious material that concentration is higher in activation recovering liquid, if activation recovering liquid to be mixed a large amount of discharges being bound to form vanadium class toxic wastewater with cleaning fluid; And carry out activation recovering separately, step by step, recycling of activation recovering liquid can be realized, thus avoid vanadium class discharge of wastewater;
(3) the regeneration SCR denitration activity obtained by the inventive method is high, and stability is good.
Accompanying drawing explanation
Below, describe embodiment of the present invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 is the stability test result of regeneration honeycomb type catalyst;
Fig. 2 is the SO adopted in the present invention
3concentration sampling analysis device schematic diagram.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further described in detail, the embodiment provided only in order to illustrate the present invention, instead of in order to limit the scope of the invention.
embodiment 1
(1) in Ultrasonic Cleaning pond, prepare cleaning fluid, wherein, the formula of cleaning fluid is: the OP-10 of the ammonium acid fluoride of 0.1wt%, the ethylenediamine tetra-acetic acid of 0.05wt%, the phosphoric acid of 1wt%, the citric acid of 9wt% and 1.5wt%, and solvent is water;
(2) in impregnating bath, prepare activation recovering liquid, thus form activation recovering impregnating bath, wherein, the formula of activation recovering liquid is: the vanadic sulfate of 1wt%, the ammonium metatungstate of 5wt%, the ammonium molybdate of 2wt% and the ammonium sulfate of 1wt%, and solvent is water;
(3) first, the inactivation honeycomb type catalyst (V more than the 150mm × 150mm × 1100mm of 24000h will be run
2o
5-WO
3-(MoO
3)/TiO
2series catalysts, 18 holes, hole × 18) be placed in Ultrasonic Cleaning pond and soak 30min, then open supersonic generator, ultrasonic cleaning 10min, takes out catalyst, with deionized water rinsing, then in drying box at 120 DEG C dry 2h, obtain dried catalyst;
(4) dried catalyst obtained in step (3) is placed in activation recovering impregnating bath at 25 DEG C, floods 30min, in 100 DEG C of dry 3h after taking-up, obtain regenerating honeycomb type catalyst.
embodiment 2
(1) in Ultrasonic Cleaning pond, prepare cleaning fluid, wherein the formula of cleaning fluid is: the OP-10 of the ammonium acid fluoride of 0.5wt%, the ethylenediamine tetra-acetic acid of 0.1wt%, the phosphoric acid of 2wt%, the citric acid of 5wt% and 0.05wt%, and solvent is water;
(2) in impregnating bath, prepare activation recovering liquid, thus form activation recovering impregnating bath, wherein, the formula of activation recovering liquid is: the vanadic sulfate of 1wt%, the ammonium metatungstate of 1wt%, the ammonium molybdate of 1wt% and the ammonium sulfate of 2wt%, and solvent is water;
(3) first, the inactivation honeycomb type catalyst (V more than the 150mm × 150mm × 1100mm of 24000h will be run
2o
5-WO
3-(MoO
3)/TiO
2series catalysts, 18 holes, hole × 18) be placed in Ultrasonic Cleaning pond and soak 40min, then open supersonic generator, ultrasonic cleaning 15min, takes out catalyst, with deionized water rinsing, then in drying box at 100 DEG C dry 3h, obtain dried catalyst;
(4) dried catalyst obtained in step (3) is placed in activation recovering impregnating bath at 25 DEG C, floods 20min, in 120 DEG C of dry 1h after taking-up, obtain regenerating honeycomb type catalyst.
embodiment 3
(1) in Ultrasonic Cleaning pond, prepare cleaning fluid, wherein, the formula of cleaning fluid is: the OP-10 of the ammonium acid fluoride of 1wt%, the ethylenediamine tetra-acetic acid of 0.5wt%, the phosphoric acid of 5wt%, the citric acid of 1wt% and 0.1wt%, and solvent is water;
(2) in impregnating bath, prepare activation recovering liquid, thus form activation recovering impregnating bath, wherein, the formula of activation recovering liquid is: the vanadic sulfate of 3wt%, the ammonium metatungstate of 7wt%, the ammonium molybdate of 3wt% and the ammonium sulfate of 1.5wt%, and solvent is water;
(3) first, the inactivation honeycomb type catalyst (V more than the 150mm × 150mm × 1100mm of 24000h will be run
2o
5-WO
3-(MoO
3)/TiO
2series catalysts, 18 holes, hole × 18) be placed in Ultrasonic Cleaning pond and soak 60min, then open supersonic generator, ultrasonic cleaning 20min, takes out catalyst, with deionized water rinsing, then in drying box at 120 DEG C dry 3h, obtain dried catalyst;
(4) dried catalyst obtained in step (3) is placed in activation recovering impregnating bath at 25 DEG C, floods 10min, in 80 DEG C of dry 6h after taking-up, obtain regenerating honeycomb type catalyst.
embodiment 4
(1) in Ultrasonic Cleaning pond, prepare cleaning fluid, wherein, the formula of cleaning fluid is: the OP-10 of the ammonium acid fluoride of 1.5wt%, the ethylenediamine tetra-acetic acid of 1wt%, the phosphoric acid of 5wt%, the citric acid of 2wt% and 2wt%, and solvent is water;
(2) in impregnating bath, prepare activation recovering liquid, thus form activation recovering impregnating bath, wherein, the formula of activation recovering liquid is: the vanadic sulfate of 5wt%, the ammonium metatungstate of 9wt%, the ammonium molybdate of 5wt% and the ammonium sulfate of 4wt%, and solvent is water;
(3) first, the inactivation honeycomb type catalyst (V more than the 150mm × 150mm × 1100mm of 24000h will be run
2o
5-WO
3-(MoO
3)/TiO
2series catalysts, 18 holes, hole × 18) be placed in Ultrasonic Cleaning pond and soak 120min, then open supersonic generator, ultrasonic cleaning 30min, take out catalyst, with deionized water rinsing then in drying box at 120 DEG C dry 4h, obtain dried catalyst;
(4) dried catalyst obtained in step (3) is placed in activation recovering impregnating bath at 25 DEG C, floods 15min, in 100 DEG C of dry 3h after taking-up, obtain regenerating honeycomb type catalyst.
embodiment 5
(1) in Ultrasonic Cleaning pond, prepare cleaning fluid, wherein, the formula of cleaning fluid is: the OP-10 of the ammonium acid fluoride of 2wt%, the ethylenediamine tetra-acetic acid of 2wt%, the phosphoric acid of 10wt%, the citric acid of 10wt% and 1wt%, and solvent is water;
(2) in impregnating bath, prepare activation recovering liquid, thus form activation recovering impregnating bath, wherein, the formula of activation recovering liquid is: the vanadic sulfate of 3wt%, the ammonium metatungstate of 10wt%, the ammonium molybdate of 4wt% and the ammonium sulfate of 5wt%, and solvent is water;
(3) first, the inactivation honeycomb type catalyst (V more than the 150mm × 150mm × 1100mm of 24000h will be run
2o
5-WO
3-(MoO
3)/TiO
2series catalysts, 18 holes, hole × 18) be placed in Ultrasonic Cleaning pond and soak 200min, then open supersonic generator, ultrasonic cleaning 40min, takes out catalyst, with deionized water rinsing, then in drying box at 120 DEG C dry 2h, obtain dried catalyst;
(4) dried catalyst obtained in step (3) is placed in activation recovering impregnating bath at 25 DEG C, floods 60min, in 100 DEG C of dry 3h after taking-up, obtain regenerating honeycomb type catalyst.
performance evaluation
The inactivation honeycomb type catalyst of embodiment 1 ~ 5, regeneration honeycomb type catalyst and fresh honeycomb type catalyst is used to carry out catalyst activity contrast, and the oxidation rate of sulfur dioxide of detecting catalyst.
1. test method
Catalyst is evaluated in 316L stainless steel fixed bed reactors.Reactor apparatus with catalyst inside filling basket, filling basket apparatus with catalyst inside.For preventing flue gas short circuit, between catalyst and filling basket, the gap of loading between basket and reaction tube seals with silica wool.In Catalyst packing basket upper and lower, all thermocouple is set, with the temperature of test reactor, adopts the accurate temperature controller of N4440 type WEST to control temperature of reactor.
Test adopts steel cylinder gas simulative power plant flue gas.Its composition is respectively: N
2, O
2, CO
2, H
2o (g), 5%NO+N
2, 5%SO
2+ N
2.Due to typical flue gas NO
xmiddle NO accounts for more than 95%, NO
2impact very little, can ignore, thus in test adopt NO replace NO
x.Wherein, the composition of experimental condition flue gas is as follows: 165ppmNO, 165ppmNH
3, 800ppmSO
2, 3.85%O
2, 13.34%CO
2, 12.31%H
2o and aequum N
2, air speed controls at 4725h
-1left and right, reaction temperature controls at 350 DEG C.
Each gas component controls to enter preheating mixer after metering through mass flowmenter; Deionized water, through U.S. ELDEX brand P-81 type micro-precision measuring pump, adds steam after entering preheating mixer vaporization; Reducing agent 5%NH
3+ N
2add before ammonia blender.
NO, SO in flue gas
2, O
2concentration adopts silent your the on-line continuous flue gas analyzer of generation that flies of match to detect.SO
3concentration adopts the manual sampling of Environmental Protection Agency M8 method to analyze, and with reference to Fig. 2, is specially: absorb SO in flue gas by isopropyl alcohol
3, record exhaust gas volumn, carries out titrimetry by thorium indicator barium chloride.
2. denitration rate
Calculate denitration rate according to formula (I), the results are shown in Table 1.
In formula (I):
η is catalyst denitration rate, %;
[NO
x]
infor reactor inlet NO
xconcentration, ppm;
[NO
x]
outfor reactor outlet NO
xconcentration, ppm.
3. catalyst activity:
Catalyst activity is calculated according to formula (II), and calculate the catalyst activity of regeneration honeycomb type catalyst relative to fresh honeycomb type catalyst of inactivation honeycomb type catalyst and embodiment 1 ~ 5, namely, relative activity (K/Ko), wherein Ko is the catalyst activity of fresh honeycomb type catalyst, the results are shown in Table 1.
In formula (II):
K is catalyst activity, m/h;
Q is flue gas flow, m
3/ h;
V is catalyst volume, m
3;
Ap is catalyst geometric proportion surface area, m
2/ m
3;
η is catalyst denitration rate, %;
MR is ammonia nitrogen mol ratio.
4.SO
2/ SO
3oxygenation efficiency
Calculate catalyst activity by formula (III), the results are shown in Table 1.
In formula (III):
K
2/3for SO
2oxygenation efficiency, %;
[SO
3]
infor reactor inlet SO
3concentration, ppm;
[SO
3]
outfor reactor outlet SO
3concentration, ppm;
[SO
2]
infor reactor inlet SO
2concentration, ppm.
Table 1 catalyst performance test result
| Catalyst sample | Denitration rate (%) | Relative activity (K/Ko) | SO 2/SO 3Oxygenation efficiency (%) |
| Fresh catalyst | 95.0 | - | 0.80 |
| Decaying catalyst | 55.6 | 0.27 | 1.50 |
| Embodiment 1 | 95.0 | 1.00 | 0.80 |
| Embodiment 2 | 94.1 | 0.95 | 0.75 |
| Embodiment 3 | 93.8 | 0.93 | 0.78 |
| Embodiment 4 | 95.0 | 1.00 | 0.81 |
| Embodiment 5 | 93.2 | 0.90 | 0.73 |
As can be seen from Table 1, SCR denitration regenerated liquid of the present invention can make the denitration activity of catalyst return to more than 90%.In addition, the denitration efficiency of the regeneration honeycomb type catalyst of continuous Evaluation operation example 1 to 5 preparation under above-mentioned appreciation condition, such as, Fig. 1 is the operation stability test result of regeneration honeycomb type catalyst prepared by embodiment 1.Result shows, and regenerated catalyst prepared by the present invention can keep good activity stability.
Claims (7)
1. a SCR denitration regenerated liquid, described regenerated liquid is made up of cleaning fluid and activation recovering liquid, wherein, the formula of described cleaning fluid is: the water of the ethylenediamine tetra-acetic acid of the ammonium acid fluoride of 0.01 ~ 2wt%, the phosphoric acid of 0.1 ~ 10wt%, 0.01 ~ 2wt%, the citric acid of 0.1 ~ 10wt%, the OP-10 of 0.01 ~ 2wt% and aequum, the formula of described activation recovering liquid is: the vanadic sulfate of 0.1 ~ 10wt%, the ammonium metatungstate of 0.1 ~ 10wt%, 0.1 ~ 5wt% ammonium molybdate, the ammonium sulfate of 0.1 ~ 10wt% and the water of aequum.
2. SCR denitration regenerated liquid according to claim 1, wherein, the formula of described cleaning fluid is: the water of the ethylenediamine tetra-acetic acid of the ammonium acid fluoride of 0.1 ~ 2wt%, the phosphoric acid of 1 ~ 10wt%, 0.05 ~ 2wt%, the citric acid of 1 ~ 10wt%, the OP-10 of 0.05 ~ 2wt% and aequum.
3. SCR denitration regenerated liquid according to claim 1 and 2, wherein, described activation recovering formula of liquid is: the vanadic sulfate of 1 ~ 5wt%, the ammonium metatungstate of 1 ~ 10wt%, 1 ~ 5wt% ammonium molybdate, the ammonium sulfate of 1 ~ 5wt% and the water of aequum.
4. utilize the method for the SCR denitration regenerated liquid regeneration SCR denitration according to any one of claim 1 to 3, said method comprising the steps of:
(1) SCR denitration to be regenerated is placed in described cleaning fluid to clean, the catalyst after cleaning is carried out rinsing and/or rinsing, then dry;
(2) the dried catalyst obtained in step (1) is immersed in described activation recovering liquid carry out activation recovering; With
(3) catalyst after activation recovering is heat-treated, obtain regenerating denitrating catalyst.
5. method according to claim 4, wherein, described in step (1), cleaning operation comprises: SCR denitration to be regenerated is placed in described cleaning fluid and soaks, then carry out Ultrasonic Cleaning and/or pressure pulse cleaning;
Preferably, it is 10 ~ 300 minutes that SCR denitration to be regenerated is placed in the time that described cleaning fluid soaks, and is preferably 30 ~ 200 minutes;
Preferably, the time of Ultrasonic Cleaning and/or pressure pulse cleaning is 10 ~ 60 minutes, is preferably 10 ~ 40 minutes.
6. the method according to claim 4 or 5, wherein, in step (2), dried catalyst immerses the time of carrying out activation recovering in described activation recovering liquid is 10 ~ 120 minutes, is preferably 10 ~ 60 minutes.
7. the method according to any one of claim 4 to 6, wherein, described in step (3), heat treatment carries out 1 ~ 24 hour at 60 ~ 300 DEG C; Preferably, described heat treatment is carried out at 80 ~ 120 DEG C.
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| CN110769933A (en) * | 2017-06-30 | 2020-02-07 | 三菱日立电力系统株式会社 | Regeneration method and regeneration system of denitration catalyst |
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| CN110769933A (en) * | 2017-06-30 | 2020-02-07 | 三菱日立电力系统株式会社 | Regeneration method and regeneration system of denitration catalyst |
| CN108144656A (en) * | 2017-11-23 | 2018-06-12 | 浙江天蓝环保技术股份有限公司 | A kind of regenerated liquid and regeneration method for denitrating catalyst of being poisoned |
| CN109126903A (en) * | 2018-09-27 | 2019-01-04 | 重庆师范大学 | A kind of plate-type denitration catalyst regeneration washing liquid and its cleaning method |
| CN114558625A (en) * | 2022-03-14 | 2022-05-31 | 龙净科杰环保技术（上海）有限公司 | SCR denitration catalyst regeneration process in steel industry |
| CN114558625B (en) * | 2022-03-14 | 2024-05-14 | 龙净科杰环保技术（上海）有限公司 | Regeneration process of SCR denitration catalyst in steel industry |
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