CN110404403A - SCR reactor and production technology - Google Patents
SCR reactor and production technology Download PDFInfo
- Publication number
- CN110404403A CN110404403A CN201910728276.4A CN201910728276A CN110404403A CN 110404403 A CN110404403 A CN 110404403A CN 201910728276 A CN201910728276 A CN 201910728276A CN 110404403 A CN110404403 A CN 110404403A
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- China
- Prior art keywords
- scr reactor
- catalyst layer
- scr
- reactor body
- reserved
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- Pending
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- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 48
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 16
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 30
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 generates N2 Chemical compound 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
SCR reactor and production technology, it is related to combustion product gases environmental protection treatment technical field.SCR reactor it include SCR reactor body, gas approach, baffle, exhaust pass, the first catalyst layer, the second catalyst layer, reserved catalyst layer, SCR reactor body upper end is equipped with gas approach, install baffle in gas approach additional, front-back staggered is arranged between two block baffles, exhaust pass is arranged in SCR reactor body bottom, sets gradually the first catalyst layer, the second catalyst layer and reserved catalyst layer from top to bottom inside SCR reactor body.After by adopting the above technical scheme, the invention has the benefit that its is reasonable in design, is conducive to ammonia and flue gas is uniformly distributed and comes into full contact with, is conducive to the progress of denitration work, it can satisfy the use that the minimum discharge of nitrogen oxides (NOx) requires, have great popularization value.
Description
Technical field
The present invention relates to combustion product gases environmental protection treatment technical fields, and in particular to SCR reactor and production technology.
Background technique
With the continuous improvement that Environmental Protection in China requires, incineration treatment of garbage has become at the important garbage disposal of one kind
The mode set, especially more and more hazardous wastes, the incineration disposal factory of clinical waste and building for MSW Incineration Plant
At, greatly improved China's solid waste environmental protection treatment disposition level, to solve the problems, such as that " garbage-surrounded city " has found one
Suitable outlet.But in China some areas, receive the contamination control requirement limitation of specific region, the discharge for incinerator
More stringent requirements are proposed, requires to reach minimum discharge not only for power plant, municipal solid waste incinerator, for hazardous waste
It burns and also requires further control concentration of emission, realize minimum discharge.In Shandong District, partial contamination control core control zone is
The requirement of the minimum discharge to nitrogen oxides in effluent (NOx) is proposed, grassroot project is required to execute the standard in the region
It is required that then facing even more serious pressure for hazardous waste burn system.The knot of current SCR reactor existing on the market
Structure design is not reasonable, is unfavorable for ammonia and flue gas is uniformly distributed and comes into full contact with, be no longer satisfied nitrogen oxides (NOx)
The use that minimum discharge requires is not suitable for promoting the use of.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of SCR reactor and production technology,
It reasonable in design, is conducive to ammonia and flue gas is uniformly distributed and comes into full contact with, and is conducive to the progress of denitration work, can be with
Meet the use that the minimum discharge of nitrogen oxides (NOx) requires, has great popularization value.
To achieve the above object, the present invention is using following technical scheme: SCR reactor it include SCR reactor body
1, gas approach 11, baffle 111, exhaust pass 12, the first catalyst layer 2, the second catalyst layer 3, reserved catalyst layer 4, SCR
1 upper end of reactor body is equipped with gas approach 11, installs baffle 111, front-back staggered between two block baffles 111 in gas approach 11 additional
Setting, 1 bottom of SCR reactor body are arranged exhaust pass 12, set gradually first from top to bottom inside SCR reactor body 1
Catalyst layer 2, the second catalyst layer 3 and reserved catalyst layer 4.
The production technology of SCR generator comprises the steps of: step 1, first evaporates ammonia；Step 2, ammonia and filtering
Flue gas after dedusting mixes merga pass distribution grid and sprays into SCR reactor；Step 3 passes through the catalysis of SCR inside reactor
Reduction reaction occurs for agent and ammonia, generates N2, H2O and carries out denitration process；Step 4, flue gas after denitration purified treatment from
It is discharged in SCR reactor.
The SCR reactor body 1 is vertical structure.
The catalyst mode set in first catalyst layer 2, the second catalyst layer 3 and reserved catalyst layer 4 is bee
Socket is board-like.
Flue gas in the step two is filtered dedusting by deduster.
After adopting the above technical scheme, the invention has the following beneficial effects: it reasonable in design, is conducive to ammonia and flue gas
It is uniformly distributed and comes into full contact with, be conducive to the progress of denitration work, can satisfy the minimum discharge requirement of nitrogen oxides (NOx)
It uses, has great popularization value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the right side view of corresponding diagram 1；
Fig. 3 is process flow chart of the invention.
Description of symbols: SCR reactor body 1, gas approach 11, baffle 111, exhaust pass 12, the first catalyst
The 2, second catalyst layer 3 of layer, reserved catalyst layer 4.
Specific embodiment
Referring to shown in Fig. 1-Fig. 3, present embodiment the technical solution adopted is that: SCR reactor it by SCR reactor
Ontology 1, gas approach 11, baffle 111, exhaust pass 12, the first catalyst layer 2, the second catalyst layer 3, reserved catalyst layer 4
Composition, 1 upper end of SCR reactor body are equipped with gas approach 11, add baffle 111, the setting of baffle 111 in gas approach 11
The horizontal segment distance that gas approach 11 can be extended extends the distance that flue gas enters 1 catalyst layer of SCR reactor body,
Flue gas can mix more uniform in flow process, and bulky grain flue dust is not easy to assemble, from upper inside SCR reactor body 1
To lower setting the first catalyst layer 2, the second catalyst layer 3 and reserved catalyst layer 4, raw catelyst can be mounted on to reserved urge
In 4 position of agent layer, to reduce catalyst change amount, and not yet entirely ineffective old catalyst is made full use of, is urged to reduce
The renewal cost of agent improves denitration efficiency.
The production technology of SCR generator comprises the steps of: step 1, first evaporates ammonia；Step 2, ammonia and filtering
Flue gas after dedusting mixes merga pass distribution grid and sprays into SCR reactor；Step 3 passes through the catalysis of SCR inside reactor
Reduction reaction occurs for agent and ammonia, generates N2, H2O and carries out denitration process；Step 4, flue gas after denitration purified treatment from
It is discharged in SCR reactor.
The SCR reactor body 1 uses vertical structure.
The shape for the catalyst installed inside first catalyst layer 2, the second catalyst layer 3 and reserved catalyst layer 4
Formula can be to be cellular or board-like, and the catalyst activity for being mainly characterized by unit volume of cellular catalyst is high, reaches phase
Catalyst volume used in same denitration efficiency is smaller, and ashes is suitble to be lower than 30g/m3, the lesser flue gas environment of ash viscosity.It is board-like
For catalyst using metal lath as skeleton, specific surface area is smaller.The characteristics of such catalyst, is: having stronger anticorrosive and anti-blocking
C1-esteraseremmer-N is suitable for dust burdening height and the stronger flue gas environment of ash viscosity.The disadvantage is that the catalyst activity of unit volume is low, opposite
Load is high, volume is big, and the steel construction used is more.
Flue gas in the step two is filtered dedusting by deduster.
After adopting the above technical scheme, the invention has the following beneficial effects: it reasonable in design, is conducive to ammonia and flue gas
It is uniformly distributed and comes into full contact with, be conducive to the progress of denitration work, can satisfy the minimum discharge requirement of nitrogen oxides (NOx)
It uses, has great popularization value.
The above is only used to illustrate the technical scheme of the present invention and not to limit it, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (5)
1.SCR reactor, it is characterised in that: SCR reactor it include SCR reactor body (1), gas approach (11), baffle
(111), exhaust pass (12), the first catalyst layer (2), the second catalyst layer (3), reserved catalyst layer (4), SCR reactor
Ontology (1) upper end is equipped with gas approach (11), installs baffle (111) additional in gas approach (11), front and back between two block baffles (111)
Shift to install, exhaust pass (12) are arranged in SCR reactor body (1) bottom, SCR reactor body (1) it is internal from top to bottom according to
The first catalyst layer of secondary setting (2), the second catalyst layer (3) and reserved catalyst layer (4).
The production technology of 2.SCR generator, it is characterised in that it includes following processing step: step 1 first evaporates ammonia；Step
Rapid two, ammonia mixes merga pass distribution grid with the flue gas after dust removal by filtration and sprays into SCR reactor；Step 3, it is anti-by SCR
It answers catalyst and ammonia inside device that reduction reaction occurs, generates N2, H2O and carry out denitration process；Step 4 is purified by denitration
Treated, and flue gas is discharged from SCR reactor.
3. SCR reactor according to claim 1, it is characterised in that: the SCR reactor body (1) is vertical knot
Structure.
4. SCR reactor according to claim 1, it is characterised in that: first catalyst layer (2), the second catalysis
The catalyst mode set in oxidant layer (3) and reserved catalyst layer (4) is honeycomb fashion or board-like.
5. the production technology of SCR reactor according to claim 2, it is characterised in that: the flue gas in the step two
Dedusting is filtered by deduster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728276.4A CN110404403A (en) | 2019-08-08 | 2019-08-08 | SCR reactor and production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910728276.4A CN110404403A (en) | 2019-08-08 | 2019-08-08 | SCR reactor and production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110404403A true CN110404403A (en) | 2019-11-05 |
Family
ID=68366441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910728276.4A Pending CN110404403A (en) | 2019-08-08 | 2019-08-08 | SCR reactor and production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110404403A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688629A (en) * | 2012-06-04 | 2012-09-26 | 东方电气集团东方锅炉股份有限公司 | SCR (selective catalytic reduction) denitration dedusting device |
| JP2013176733A (en) * | 2012-02-28 | 2013-09-09 | Mitsubishi Heavy Ind Ltd | Denitration device and reducing agent distribution adjusting method of denitration device |
| CN206897178U (en) * | 2017-05-02 | 2018-01-19 | 大唐环境产业集团股份有限公司 | A kind of SCR reactors of new combination type flue |
| CN207591613U (en) * | 2017-04-17 | 2018-07-10 | 伟明环保设备有限公司 | A kind of regenerated SCR system of low-temperature SCR catalyst |
| CN109364742A (en) * | 2018-11-15 | 2019-02-22 | 安徽威达环保科技股份有限公司 | A kind of collaboration of sintering flue gas SCR denitration takes off white device and technique |
| CN109381990A (en) * | 2018-10-17 | 2019-02-26 | 北京国电龙源环保工程有限公司 | A kind of steel sintering flue gas denitrification system and the method for denitration using system progress |
| CN210729158U (en) * | 2019-08-08 | 2020-06-12 | 上海灿州环境工程有限公司 | SCR reactor |
-
2019
- 2019-08-08 CN CN201910728276.4A patent/CN110404403A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013176733A (en) * | 2012-02-28 | 2013-09-09 | Mitsubishi Heavy Ind Ltd | Denitration device and reducing agent distribution adjusting method of denitration device |
| CN102688629A (en) * | 2012-06-04 | 2012-09-26 | 东方电气集团东方锅炉股份有限公司 | SCR (selective catalytic reduction) denitration dedusting device |
| CN207591613U (en) * | 2017-04-17 | 2018-07-10 | 伟明环保设备有限公司 | A kind of regenerated SCR system of low-temperature SCR catalyst |
| CN206897178U (en) * | 2017-05-02 | 2018-01-19 | 大唐环境产业集团股份有限公司 | A kind of SCR reactors of new combination type flue |
| CN109381990A (en) * | 2018-10-17 | 2019-02-26 | 北京国电龙源环保工程有限公司 | A kind of steel sintering flue gas denitrification system and the method for denitration using system progress |
| CN109364742A (en) * | 2018-11-15 | 2019-02-22 | 安徽威达环保科技股份有限公司 | A kind of collaboration of sintering flue gas SCR denitration takes off white device and technique |
| CN210729158U (en) * | 2019-08-08 | 2020-06-12 | 上海灿州环境工程有限公司 | SCR reactor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20191105 |