CN207237700U - Flue-gas denitration process system - Google Patents
Flue-gas denitration process system Download PDFInfo
- Publication number
- CN207237700U CN207237700U CN201720552662.9U CN201720552662U CN207237700U CN 207237700 U CN207237700 U CN 207237700U CN 201720552662 U CN201720552662 U CN 201720552662U CN 207237700 U CN207237700 U CN 207237700U
- Authority
- CN
- China
- Prior art keywords
- flue
- pipeline
- denitration
- heat exchanger
- process system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000003546 flue gas Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 25
- 239000000779 smoke Substances 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000000197 pyrolysis Methods 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 239000007789 gas Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a kind of flue-gas denitration process system, it includes：Heat exchanger mechanism and SCR reactors, primary air system and pipe-line system including boiler furnace, outside boiler furnace, the heat exchanger mechanism has into smoke pipeline, heat exchanger cavity and smoke pipeline, this enters one end connection boiler furnace of smoke pipeline, the other end connects heat exchanger cavity, which, which has, is connected to flue and the denitration rear pass of connection SCR reactors lower end before the denitration between boiler furnace afterbody and SCR reactors；Above-mentioned smoke pipeline one end is connected in heat exchanger cavity, and the other end is connected in denitration rear pass, and the primary air system has the first pipeline through heat exchanger cavity；By the way that above-mentioned short-circuit pipeline is connected smoke pipeline and flue before denitration, compared with the prior art, this can be entered to high-temperature flue gas in smoke pipeline by flue before short-circuit pipeline to denitration, to increase the flue-gas temperature before denitration in flue, fully realize that SCR reactors carry out denitration, reduce pollution.
Description
【Technical field】
It the utility model is related to a kind of flue-gas denitration process system of coal-burning power plant, more particularly to a kind of pyrolytic reaction
Flue-gas denitration process system.
【Background technology】
Nitrogen oxides (NOx) in coal-fired plant flue gas is one of main atmosphere pollution, at present main application selection
Property catalytic reduction technique (SCR) administer flue gas in nitrogen oxides discharge, i.e., using reducing agent selectively with flue gas
Reaction of nitrogen oxides, and generate nontoxic and pollution-free nitrogen (N2) and water (H2O), denitration environmental protection is achieveed the purpose that.Denitrating system
Common reducing agent has liquefied ammonia, ammonium hydroxide and a urea liquid, selects urea to be used as reducing agent, with it is safe, derive from a wealth of sources, easily
In the transport and storage the features such as, it is widely used in field of environment protection, its action principle is that urea liquid is passed through pyrolysis
Device is pyrolyzed into ammonia, is sent into SCR reactors, then chemical reduction reaction occurs, and realizes the purpose of denitration environmental protection.
Refer in Chinese utility model patent disclosed in 11 days Mays in 2016 the 201520986907.xth, it is disclosed
A kind of flue-gas denitration process system, it includes boiler, pyrolysis oven, SCR reactors, and flue connects boiler and pyrolysis oven
It is connected together, and the downstream of pyrolysis oven is provided with SCR reactors, fully to decompose and reach denitration by the flue gas in boiler
Effect, reduces pollution of the flue gas to environment, but when boiler just starts, it is too low into the flue-gas temperature in SCR reactors,
When being such as less than 320 DEG C, the catalyst in SCR reactors can not be reacted, and thus, the harmful substance in flue gas can not be divided
The processes such as denitration are solved, air is polluted, influences environment.
Thus, it is desirable to a kind of creative technique of design is simple, operating cost is low, the flue-gas denitration process system of abundant denitration
Unite to meet the market requirement.
【Utility model content】
In order to solve the above technical problems, the utility model provides a kind of flue-gas denitration process system for reducing pollution.
The utility model is to be achieved through the following technical solutions：A kind of flue-gas denitration process system, it includes：Including boiler
Burner hearth, the heat exchanger mechanism and SCR reactors outside boiler furnace, primary air system and pipe-line system, the heat exchanger machine
Structure has into smoke pipeline, heat exchanger cavity and smoke pipeline, this enters one end connection boiler furnace of smoke pipeline, and other end connection is changed
Hot device cavity, which, which has, is connected to flue and connection SCR before the denitration between boiler furnace afterbody and SCR reactors
The denitration rear pass of reactor lower end；Above-mentioned smoke pipeline one end is connected in heat exchanger cavity, after the other end is connected to denitration
In flue, the primary air system has the first pipeline through heat exchanger cavity；First pipe end is directly connected to
Before the SCR reactors or denitration in flue, and the pipe-line system further has and is connected to cigarette before smoke pipeline and denitration
Short-circuit pipeline between road and the valve on short-circuit pipeline.
Further improvement project has：The flue-gas denitration process system further comprises the pyrolysis being connected on the first pipeline
Mechanism, the pyrolysis mechanism are communicated between heat exchanger cavity downstream and SCR reactors upstream.
Further improvement project has：The flue-gas denitration process system further comprises the electricity for having positioned at pyrolysis mechanism upstream
Heater, above-mentioned primary air system have the second pipe being connected on the first pipeline, and connect intersection and be located at electric heater
Upstream.
Further improvement project has：There is a pair of of the valve for being located at heat exchanger cavity upstream and downstream respectively on first pipeline
, it also is provided with valve on second pipe.
Further improvement project has：The primary air system has the 3rd of a wind pipe and connection boiler furnace bottom
Pipeline, a wind pipe connect above-mentioned first, second, third pipeline.
Further improvement project has：The flue-gas denitration process system further comprises there is air preheater, above-mentioned denitration
Pipeline is connected between air preheater and SCR reactors afterwards, and above-mentioned a wind pipe passes through air preheater.
The beneficial effects of the utility model are as follows：By the way that above-mentioned short-circuit pipeline is connected smoke pipeline and flue before denitration,
Compared with the prior art, this can be entered to high-temperature flue gas in smoke pipeline by flue before short-circuit pipeline to denitration, with lifting
Flue-gas temperature before denitration in flue, fully realizes that SCR reactors carry out denitration, reduces pollution.
【Brief description of the drawings】
Fig. 1 is the schematic diagram of the utility model flue-gas denitration process system embodiment.
【Embodiment】
As shown in Figure 1, being a kind of flue-gas denitration process system that the utility model is related to, it includes boiler furnace 1, changes
Re Qi mechanisms 2, SCR reactors 3, pyrolysis mechanism 4, electric heater 5, air preheater 7, primary air system 8, multiple valves 10 and
Pipe-line system.The boiler furnace 1 is the equipment for generating high-temperature flue gas.
The heat exchanger mechanism 2 and SCR reactors 3 are located on the outside of boiler furnace, and the heat exchanger mechanism 2 has into cigarette
Pipeline 21, heat exchanger cavity 22 and smoke pipeline 23, wherein one end connection boiler furnace 1 for entering smoke pipeline 21, the other end connect
Connect heat exchanger cavity 22；23 one end of smoke pipeline is connected in heat exchanger cavity 22, and the other end is connected to denitration rear pass 92
It is interior.In present embodiment, this, which enters smoke pipeline 21, is connected at the upper end of neighbouring boiler furnace 1, or is interpreted as into smoke pipeline
It is the region with more than 450 DEG C of high-temperature flue gas at 21 connection boiler furnaces, thus, the high-temperature flue gas of the boiler furnace 1 is straight
Connect and be transported to by entering smoke pipeline 21 in the heat exchanger cavity 22, exchanged heat to First air, specific effect is detailed later.
Above-mentioned pipe-line system has flue 91, denitration rear pass 92, short-circuit pipeline 93, discharge line 94 before denitration, wherein,
Flue 91 is connected between 1 afterbody of boiler furnace and SCR reactors 3 before denitration, and denitration rear pass 92 is connected under SCR reactors
End, and extend in air preheater 7；Flue 91 is the bottom for being connected to boiler furnace before present embodiment, the denitration,
Or 11 lower end of economizer of the connection boiler furnace flue of flue 91 before denitration is interpreted as, boiler combustion flue gas is sent to above-mentioned
Denitration process is carried out in SCR reactors 3.
The primary air system 8 includes the first pipeline 81, second pipe 82, the 3rd pipeline 83, First air input channel 84,
The First air input channel 84 passes through above-mentioned air preheater 7, and primary air piping aqueduct connection above-mentioned first, second, third
Pipeline, and above-mentioned pyrolysis oven 4 and electric heater 5 are communicated on the first pipeline 81, i.e., the pyrolysis oven 4 is connected with electric heater 5
To between heat exchanger cavity 22 and SCR reactors 3, the 3rd pipeline 83 connects 1 bottom of boiler furnace, to be pressurized to boiler furnace 1,
It is combustion-supporting and other effects.
In the present embodiment, first, second pipeline (also referred to as crosses in the upstream of heater 5 equipped with the first intersection
Place), and the second intersection is equipped with neighbouring First air input channel 84, which is equipped with respectively positioned at heat exchange
A pair of of valve 10 of 22 upstream and downstream of device cavity, also is provided with valve 10 on second pipe 82, passes through first pipeline 81 and second and manages
The shunting of road 82 is set, and is conducive to the maintenance of denitrating technique system and is reduced cost, and keeps work(of the system with continuous operation
Effect, the i.e. gas temperature when the gas in the first pipeline 81 after the heat exchange of heat exchanger mechanism 2 are not reaching to minimum pyrolysis temperature
When (such as more than 450 degree), or heat exchanger cavity 22 is needed in the case of safeguarding, can close the valve 10 on the first pipeline 81,
And open the valve 10 on second pipe 82, and gas is heated by electric heater 5, easy to subsequent handling pyrolysis and
SCR reaction requirements；Similarly, it is lost to reduce function, it is generally the case that only need to open the first pipeline 81 and work, without starting electricity
Heater 5, and close second pipe 82.
The utility model by above-mentioned short-circuit pipeline 93 by connecting smoke pipeline 21 and flue 91 before denitration, relatively existing skill
Art, such as when boiler furnace 1 just starts, the flue-gas temperature after economizer 11 is too low, i.e., when the cigarette before denitration in flue 91
When temperature degree is not reaching to the temperature of SCR reactors (such as 320 DEG C), by opening the valve 10 on short-circuit pipeline 93, because entering cigarette
Pipeline 21 is in the upside of boiler furnace 1, so the high-temperature flue gas this entered in smoke pipeline 21 passes through short-circuit pipeline to denitration
In preceding flue 91, to lift the flue-gas temperature before denitration in flue 91, fully realize that SCR reactors carry out denitration, reduce dirty
Dye.
Certainly, above-mentioned first pipeline 81 also may be connected directly to before denitration on flue 92, by the gas after pyrolysis and denitration
High-temperature flue gas in preceding pipeline 92 is sufficiently mixed uniformly to be transported in SCR reactors again, fully to be reacted, lower loss and
Prevent not sufficiently reactive pernicious gas from entering in air.
Claims (6)
1. a kind of flue-gas denitration process system, it includes：Including boiler furnace (1), the heat exchanger mechanism outside boiler furnace
(2) have with SCR reactors (3), primary air system (8) and pipe-line system, the heat exchanger mechanism into smoke pipeline (21), heat exchange
Device cavity (22) and smoke pipeline (23), this enters one end connection boiler furnace (1) of smoke pipeline (21), other end connection heat exchanger
Cavity (22), which, which has, is connected to flue before the denitration between boiler furnace (1) afterbody and SCR reactors (3)
(91) and connection SCR reactors lower end denitration rear pass (92)；Above-mentioned smoke pipeline (23) one end is connected to heat exchanger cavity
(22) on, the other end is connected in denitration rear pass (92), and the primary air system has the through heat exchanger cavity (22)
One pipeline (81)；It is characterized in that：Before first pipeline (81) end is directly connected to the SCR reactors (3) or denitration
In flue (91), and the pipe-line system further have be connected to it is short between flue (91) before smoke pipeline (21) and denitration
Road pipeline (93) and the valve (10) on short-circuit pipeline.
2. flue-gas denitration process system as claimed in claim 1, it is characterised in that：The flue-gas denitration process system is further
Including the pyrolysis mechanism (4) being connected on the first pipeline (81), which is communicated in heat exchanger cavity (22) downstream and SCR
Between reactor (3) upstream.
3. flue-gas denitration process system as claimed in claim 2, it is characterised in that：The flue-gas denitration process system is further
Include the electric heater (5) positioned at pyrolysis mechanism (4) upstream, above-mentioned primary air system, which has, to be connected on the first pipeline (81)
Second pipe (82), and connect intersection and be located at the upstream of electric heater (5).
4. flue-gas denitration process system as claimed in claim 3, it is characterised in that：There is difference on first pipeline (81)
A pair of of valve (10) positioned at heat exchanger cavity (22) upstream and downstream, also is provided with valve (10) on second pipe (82).
5. flue-gas denitration process system as claimed in claim 3, it is characterised in that：The primary air system has primary air piping
Road (84) and the 3rd pipeline (83) of connection boiler furnace bottom, above-mentioned first, second, third pipe of a wind pipe connection
Road.
6. flue-gas denitration process system as claimed in claim 5, it is characterised in that：The flue-gas denitration process system is further
Include air preheater (7), pipeline is connected between air preheater (7) and SCR reactors (3) after above-mentioned denitration, above-mentioned
A wind pipe (84) passes through air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720552662.9U CN207237700U (en) | 2017-05-17 | 2017-05-17 | Flue-gas denitration process system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720552662.9U CN207237700U (en) | 2017-05-17 | 2017-05-17 | Flue-gas denitration process system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207237700U true CN207237700U (en) | 2018-04-17 |
Family
ID=61876423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720552662.9U Withdrawn - After Issue CN207237700U (en) | 2017-05-17 | 2017-05-17 | Flue-gas denitration process system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207237700U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731027A (en) * | 2018-06-15 | 2018-11-02 | 国电科学技术研究院有限公司 | A kind of control system and method for Rear of Utility Boiler smoke temperature |
| CN108939900A (en) * | 2017-05-17 | 2018-12-07 | 昆山市三维换热器有限公司 | Flue-gas denitration process system |
| CN116617839A (en) * | 2023-05-22 | 2023-08-22 | 辽宁大唐国际锦州热电有限责任公司 | Urea hydrolysis denitration dilution air device of thermal power factory |
-
2017
- 2017-05-17 CN CN201720552662.9U patent/CN207237700U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939900A (en) * | 2017-05-17 | 2018-12-07 | 昆山市三维换热器有限公司 | Flue-gas denitration process system |
| CN108939900B (en) * | 2017-05-17 | 2024-06-28 | 昆山市三维换热器有限公司 | Flue gas denitration process system |
| CN108731027A (en) * | 2018-06-15 | 2018-11-02 | 国电科学技术研究院有限公司 | A kind of control system and method for Rear of Utility Boiler smoke temperature |
| CN116617839A (en) * | 2023-05-22 | 2023-08-22 | 辽宁大唐国际锦州热电有限责任公司 | Urea hydrolysis denitration dilution air device of thermal power factory |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20240628 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20240628 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |