CN109622070A - One kind scrapping denitrating catalyst regeneration method - Google Patents
One kind scrapping denitrating catalyst regeneration method Download PDFInfo
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- CN109622070A CN109622070A CN201811502493.3A CN201811502493A CN109622070A CN 109622070 A CN109622070 A CN 109622070A CN 201811502493 A CN201811502493 A CN 201811502493A CN 109622070 A CN109622070 A CN 109622070A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
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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
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- B01J38/02—Heat treatment
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- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/04—Gas or vapour treating; Treating by using liquids vaporisable upon contacting spent catalyst
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention belongs to selective catalytic reduction denitration fields, and in particular to one kind scraps denitrating catalyst regeneration method.The method scraps denitrating catalyst surface deposits by purging removal, will carry out break process by the denitrating catalyst of scrapping of purge, obtains bulk catalyst；The bulk catalyst is cleaned to remove the deposit of catalyst surface and hole, be then dried, obtains regeneration bulk catalyst.Multistage stratum reticulare is set in Benitration reactor, the regeneration bulk catalyst is then evenly arranged in every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body.One kind provided by the invention scraps that denitrating catalyst regeneration method is easy to operate, renewable treating capacity is big, energy and material consumption is low, secondary pollution is small, and regeneration catalyzing effect is good.
Description
Technical field
The invention belongs to selective catalytic reduction (Selective Catalytic Reduction, SCR) denitration necks
Domain, and in particular to one kind scraps denitrating catalyst regeneration method.
Background technique
SCR technology achieves good denitration effect in denitrating flue gas field, gradually occupies leading market status,
Technological core is SCR catalyst.However, catalyst service life is limited, wherein the average life span of vanadium Titanium series catalyst is 3-5 years.
Due to vanadic anhydride (V2O5) poisonous and harmful property, " National Hazard waste register " clear stipulaties give up vanadium Titanium series catalyst belong to
Hazardous waste (waste classification is HW50).In addition, either vanadium titanium system is also scrapping for non-vanadium titanium system's denitrating catalyst, if adopting
Denitration cost will all be significantly increased with raw catelyst replacement.Therefore, denitrating catalyst is scrapped disposition and will be answered as SCR technology
One emphasis.2014, Chinese Ministry of Environmental Protection's publication " about the notice for reinforcing discarded catalyst for denitrating flue gas supervision " was wanted
It asks the regeneration for improving waste flue gas denitration catalyst and using disposing capacity, is specified to the handling problems for scrapping denitrating catalyst
Direction.
Currently, scrap the method for the regenerated offline of denitrating catalyst, mainly by useless denitrating catalyst surface removal of impurities and
The supplement of active constituent regenerates to realize.Patent (CN102962079B) discloses a kind of discarded vanadium titanium-based SCR denitrating flue gas and urges
Agent regeneration method, is first purged catalyst, ball milling prepares reclaimed materials, then adds active component and auxiliary agent, finally
Again extrusion molding preparation regeneration denitrating catalyst.Patent (CN106807401B) discloses a kind of regeneration of denitrating catalyst
Useless denitrating catalyst is roasted, is leached, extracted and is stripped to obtain containing soluble vanadic salts and tungsten salt by method first
Mixed solution then deploys solution composition, and finally regeneration denitrating catalyst is made in dipping again.However, above method process is multiple
It is miscellaneous, higher cost.Patent (CN105582962B) discloses a kind of MnOx/TiO2The regeneration method of based low-temperature denitration catalyst,
Catalyst is subjected to the processing such as surface purging, removal of impurities, impregnating active liquid, roasting and obtains regeneration SCR denitration.This method
Catalyst complete structure is remained, however its original mechanical property is difficult to ensure that there are security risks.
Summary of the invention
In view of the above-mentioned problems, the present invention provides one kind to scrap denitrating catalyst regeneration method, first to scrapping denitration
Catalyst is purged, then will scrap catalyst breakage, so that the catalytic inner with greater activity is exposed to surface, then
Catalyst is cleaned using deionized water, surfaces nonreactive ingredient is removed, then catalyst is dried, can be regenerated
Bulk catalyst can be reused in industrial smoke denitration engineering by re-assemblying.
The present invention is achieved by the following technical solutions:
One kind scrapping denitrating catalyst regeneration method, which comprises scraps denitration catalyst by purging removal
Agent surface deposits will carry out break process by the denitrating catalyst of scrapping of purge, obtain bulk catalyst；To institute
It states bulk catalyst to be cleaned to remove the deposit of catalyst surface and hole, is then dried, is regenerated
Bulk catalyst.
Further, the condition of the purging is controlled are as follows: purge gas is air or nitrogen, 0.01-2m of gas flow rate3/
S, gas pressure are 0.1-2MPa；Can remove by purging and scrap denitrating catalyst surface deposits, by catalyst activity at
Divide and appears.
Further, the size of the bulk catalyst obtained by break process is 3-20 cm.Pass through break process
The inside for scrapping denitrating catalyst can be appeared.
Further, the cleaning specifically: the bulk catalyst obtained after being crushed is carried out using deionized water
It rinses or is cleaned by ultrasonic；
When using rinsing, control flushing pressure is 0.1-10MPa；
When using ultrasonic cleaning, the control ultrasonic cleaning time is 20-120min.
The deposit for scrapping catalyst surface and hole can further be removed by being rinsed or being cleaned by ultrasonic using deionized water,
Such as flying dust, and it can dissolve the solable matter of catalyst surface, such as ammonium salt, sodium salt, sylvite, sulfate, to dredge catalyst pores
Gap releases above-mentioned solable matter and occupies to active site.
Further, in the step of the drying, control drying temperature is 150-600 DEG C, and drying time is 0.5-
5h.In 150-600 DEG C of dry decomposable carbonate, sulfate etc. for scrapping catalyst surface formation.
Further, multistage stratum reticulare is set in Benitration reactor, is then evenly arranged the regeneration bulk catalyst
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body.
Further, the catalyst activity of the catalyst elements body can be restored to 85% of raw catelyst or more.
Advantageous effects of the invention:
(1) denitrating catalyst regeneration method provided by the present invention of scrapping is without adding (being impregnated or coated) activity
Recycling can be realized in component, particularly with serious inactivation catalyst without complicated reproducer；
(2) method for arranging of the denitrating catalyst provided by the present invention in Benitration reactor has catalyst useful load
Greatly, the advantages of safety and firmness, avoidable catalyst cave-in accident；
(3) it is provided by the invention scrap denitrating catalyst regeneration method it is easy to operate, can treating capacity be big, energy consumption object
Consume low, and regeneration catalyzing effect is good；
(4) it is provided by the present invention scrap denitrating catalyst regeneration method and will scrap denitrating catalyst be regenerated as height
SCR denitration is imitated, the waste of resource is avoided, reduces the investment of denitration cost, while solving and scrapping catalyst heap
It sets, fill etc. to appropriation of land, economy with higher, environmental benefit.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention but not
It is all, not constitute an undue limitation on the present invention.
Fig. 1 is that one kind scraps denitrating catalyst regeneration method flow diagram in the embodiment of the present invention；
Appended drawing reference: 1. blocky regenerated catalysts；2. stratum reticulare；3. catalyst elements body.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments,
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining this hair
It is bright, it is not intended to limit the present invention.
On the contrary, the present invention covers any substitution done on the essence and scope of the present invention being defined by the claims, repairs
Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to of the invention thin
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
The present invention can also be understood completely in description.
Embodiment 1
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 0.01m3/ s, gas pressure 0.2MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 0.1MPa；Then catalyst is dried at 150 DEG C, drying time 5h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 85% of agent.
Embodiment 2
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.3m3/ s, gas pressure 0.4MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 20min；Then catalyst is dried at 600 DEG C, drying time 4h；Finally
Catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be extensive
The 86% of raw catelyst is arrived again.
Embodiment 3
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 0.6m3/ s, gas pressure 0.6MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 1MPa；Then catalyst is dried at 200 DEG C, drying time 4.5h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 87% of agent.
Embodiment 4
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.9m3/ s, gas pressure 0.8MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 30min；Then catalyst is dried at 250 DEG C, drying time 4.3h；Most
Catalyst is re-assemblied afterwards, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can
It is restored to the 88% of raw catelyst.
Embodiment 5
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 1.1m3/ s, gas pressure 1MPa；Catalyst breakage will be scrapped to the block having a size of 3-20cm after purge
Shape catalyst 1；Then deionized water is used to be rinsed to denitrating catalyst is scrapped to remove catalyst surface spot and its table
Layer, flushing pressure 2MPa；Then catalyst is dried at 300 DEG C, drying time 3.5h；Finally by catalyst weight
Multistage stratum reticulare 2 is arranged in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multi-level network for new assembling
Every level-one stratum reticulare in layer forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be restored to new catalysis
The 89% of agent.
Embodiment 6
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 1.3m3/ s, gas pressure 1.2MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 40min；Then catalyst is dried at 350 DEG C, drying time 3h；Finally
Catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be extensive
The 90% of raw catelyst is arrived again.
Embodiment 7
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 1.5m3/ s, gas pressure 1.4MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 3MPa；Then catalyst is dried at 400 DEG C, drying time 2.5h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 91% of agent.
Embodiment 8
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 1.7m3/ s, gas pressure 1.6MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 55min；Then catalyst is dried at 450 DEG C, drying time 2h；Finally
Catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be extensive
The 88% of raw catelyst is arrived again.
Embodiment 9
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 1.9m3/ s, gas pressure 1.8MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 4MPa；Then catalyst is dried at 500 DEG C, drying time 1.5h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 92% of agent.
Embodiment 10
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.1m3/ s, gas pressure 0.3MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 65min；Then catalyst is dried at 550 DEG C, drying time 1h；Finally
Catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be extensive
The 87% of raw catelyst is arrived again.
Embodiment 11
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 2m3/ s, gas pressure 2MPa；Catalyst breakage will be scrapped to the bulk having a size of 3-20cm after purge
Catalyst 1；Then deionized water is used to be rinsed to denitrating catalyst is scrapped to remove catalyst surface spot and its table
Layer, flushing pressure 5MPa；Then catalyst is dried at 580 DEG C, drying time 1.2h；Finally by catalyst weight
Multistage stratum reticulare 2 is arranged in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multi-level network for new assembling
Every level-one stratum reticulare in layer forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be restored to new catalysis
The 85.5% of agent.
Embodiment 12
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.2m3/ s, gas pressure 0.15MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 75min；Then catalyst is dried at 530 DEG C, drying time 1.7h；Most
Catalyst is re-assemblied afterwards, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can
It is restored to the 89% of raw catelyst.
Embodiment 13
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 0.4m3/ s, gas pressure 0.5MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 6MPa；Then catalyst is dried at 470 DEG C, drying time 2.2h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 91% of agent.
Embodiment 14
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.6m3/ s, gas pressure 0.7MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 90min；Then catalyst is dried at 420 DEG C, drying time 2.7h；Most
Catalyst is re-assemblied afterwards, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can
It is restored to the 93% of raw catelyst.
Embodiment 15
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 0.78m3/ s, gas pressure 0.9MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and its
Surface layer, flushing pressure 7MPa；Then catalyst is dried at 370 DEG C, drying time 3.2h；Finally by catalyst
It re-assemblies, multistage stratum reticulare 2 is set in Benitration reactor, blocky regenerated catalyst 1 is then evenly arranged in the multistage
Every level-one stratum reticulare in stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition, which can be restored to, newly urges
The 95% of agent.
Embodiment 16
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 0.96m3/ s, gas pressure 1.13MPa；Catalyst breakage will be scrapped to having a size of 3-20cm after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface dirt
Stain and its surface layer, ultrasonic cleaning time are 100min；Then catalyst is dried at 320 DEG C, drying time 3.7h；
Finally catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, then by the uniform cloth of blocky regenerated catalyst 1
The every level-one stratum reticulare being placed in the multistage stratum reticulare, forms catalyst elements body 3；The active energy of the catalyst elements body 3 of acquisition
Enough it is restored to the 97% of raw catelyst.
Embodiment 17
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 1.03m3/ s, gas pressure 1.42MPa；Catalyst breakage will be scrapped to having a size of 3-20cm after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and
Its surface layer, flushing pressure 8MPa；Then catalyst is dried at 270 DEG C, drying time 4.3h；It finally will catalysis
Agent re-assemblies, and multistage stratum reticulare 2 is arranged in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1 described more
Every level-one stratum reticulare in grade stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be restored to newly
The 98% of catalyst.
Embodiment 18
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 1.42m3/ s, gas pressure 1.76MPa；Catalyst breakage will be scrapped to having a size of 3-20cm after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface dirt
Stain and its surface layer, ultrasonic cleaning time are 110min；Then catalyst is dried at 220 DEG C, drying time 4.9h；
Finally catalyst is re-assemblied, multistage stratum reticulare 2 is set in Benitration reactor, then by the uniform cloth of blocky regenerated catalyst 1
The every level-one stratum reticulare being placed in the multistage stratum reticulare, forms catalyst elements body 3；The active energy of the catalyst elements body 3 of acquisition
Enough it is restored to the 99% of raw catelyst.
Embodiment 19
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is air, purge gas
Flow velocity is 1.81m3/ s, gas pressure 1.98MPa；Catalyst breakage will be scrapped to having a size of 3-20cm after purge
Bulk catalyst 1；Then use deionized water to scrap denitrating catalyst be rinsed with remove catalyst surface spot and
Its surface layer, flushing pressure 10MPa；Then catalyst is dried at 180 DEG C, drying time 3.8h；It will finally urge
Agent re-assemblies, and multistage stratum reticulare 2 is arranged in Benitration reactor, is then evenly arranged in blocky regenerated catalyst 1 described
Every level-one stratum reticulare in multistage stratum reticulare forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can be restored to
The 98.5% of raw catelyst.
Embodiment 20
It is purged first to remove surface deposits to scrapping denitrating catalyst, purge gas is nitrogen, purge gas
Flow velocity is 1.95m3/ s, gas pressure 199MPa；Catalyst breakage will be scrapped to having a size of 3-20cm's after purge
Bulk catalyst 1；Then deionized water is used to be cleaned by ultrasonic to denitrating catalyst is scrapped to remove catalyst surface spot
And its surface layer, ultrasonic cleaning time are 120min；Then catalyst is dried at 580 DEG C, drying time 0.5h；Most
Catalyst is re-assemblied afterwards, multistage stratum reticulare 2 is set in Benitration reactor, is then evenly arranged blocky regenerated catalyst 1
Every level-one stratum reticulare in the multistage stratum reticulare, forms catalyst elements body 3；The activity of the catalyst elements body 3 of acquisition can
It is restored to the 86% of raw catelyst.
Claims (7)
1. one kind scraps denitrating catalyst regeneration method, which is characterized in that the described method includes: being scrapped by purging removal
Denitrating catalyst surface deposits will carry out break process by the denitrating catalyst of scrapping of purge, obtain blocky catalysis
Agent；The bulk catalyst is cleaned to remove the deposit of catalyst surface and hole, is then dried, obtains
To regeneration bulk catalyst.
2. one kind scraps denitrating catalyst regeneration method according to claim 1, which is characterized in that control the purging
Condition are as follows: purge gas be air or nitrogen, 0.01-2m of gas flow rate3/ s, gas pressure are 0.1-2MPa.
3. one kind scraps denitrating catalyst regeneration method according to claim 1, which is characterized in that pass through break process
The size of the bulk catalyst obtained is 3-20cm.
4. one kind scraps denitrating catalyst regeneration method according to claim 1, which is characterized in that the cleaning is specific
Are as follows: the bulk catalyst obtained after being crushed is rinsed or is cleaned by ultrasonic using deionized water；
When using rinsing, control flushing pressure is 0.1-10MPa；
When using ultrasonic cleaning, the control ultrasonic cleaning time is 20-120min.
5. one kind scraps denitrating catalyst regeneration method according to claim 1, which is characterized in that in the drying
In step, control drying temperature is 150-600 DEG C, and drying time is 0.5-5h.
6. one kind scraps denitrating catalyst regeneration method according to claim 1, which is characterized in that in Benitration reactor
Then the regeneration bulk catalyst is evenly arranged in every level-one stratum reticulare in the multistage stratum reticulare by the multistage stratum reticulare of middle setting,
Form catalyst elements body.
7. one kind scraps denitrating catalyst regeneration method according to claim 6, which is characterized in that it is characterized in that,
The catalyst activity of the catalyst elements body can be restored to 85% of raw catelyst or more.
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