CN205495348U - SCR denitration reaction device of coupling economizer - Google Patents
SCR denitration reaction device of coupling economizer Download PDFInfo
- Publication number
- CN205495348U CN205495348U CN201521038040.1U CN201521038040U CN205495348U CN 205495348 U CN205495348 U CN 205495348U CN 201521038040 U CN201521038040 U CN 201521038040U CN 205495348 U CN205495348 U CN 205495348U
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- China
- Prior art keywords
- scr denitration
- economizer
- denitration reactor
- exhaust pass
- reactor
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 15
- 230000008878 coupling Effects 0.000 title claims abstract description 8
- 238000010168 coupling process Methods 0.000 title claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000009257 reactivity Effects 0.000 abstract description 3
- 230000007306 turnover Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a SCR denitration reaction device of coupling economizer, including SCR denitration reactor, locate the entry flue at this SCR denitration reactor top and locate the exhaust pass of SCR denitration reactor bottom, be equipped with ammonia injection grid on the entry flue, SCR denitration reactor's exhanst gas outlet department is equipped with the economizer, the bottom of this economizer with exhaust pass links to each other, entry flue and exhaust pass are external in boiler body respectively. The utility model discloses simple structure, area is few, low in manufacturing cost, the energy can be saved, the reactivity of SCR reactor is good moreover, and the business turn over flue is connected simply.
Description
Technical field
This utility model belongs to SCR denitrating flue gas field, especially relates to a kind of SCR denitration reaction unit coupling economizer.
Background technology
At present, in conventional SCR denitration device, main economizer is generally located on the front portion of SCR reactor, boiler export flue gas first passes through economizer and passes through SCR reactor and react, this mode easily causes the exit gas temperature lower limit less than catalyst Applicable temperature scope of economizer, thus cause the mixed gas of flue gas and reducing agent that side reaction occurs on a catalyst, reducing the activity of catalyst, reaction effect is deteriorated.And this structure design can cause the insufficient space between boiler tail economizer and air preheater, and then the connection of impact turnover flue.
Utility model content
In order to overcome the deficiencies in the prior art, this utility model provides a kind of simple in construction, floor space is little, reactivity worth good, is particularly suitable for the SCR denitration reaction unit coupling economizer of insufficient space between boiler tail economizer and air preheater.
This utility model solves its technical problem and be the technical scheme is that a kind of SCR denitration reaction unit coupling economizer, the gas approach including SCR denitration reactor, being located at this SCR denitration reactor head and the exhaust pass being located at SCR denitration reactor bottom, gas approach is provided with ammonia-spraying grid, the smoke outlet of SCR denitration reactor is provided with economizer, and the bottom of this economizer is connected with described exhaust pass；Gas approach and exhaust pass are external in boiler body respectively.Ensure that the SCR reactor inlet flue-gas temperature effective active temperature range at catalyst, and pipeline between higher level's air preheater and subordinate's air preheater in having vacateed boiler body, it is simple to the connection of flue, and then reduce the floor space of whole device.
Further, it is provided with fairing between gas approach and SCR denitration reactor.Mixed gas is uniformly dispersed, improves reaction effect.
Further, gas approach and exhaust pass are external between higher level's air preheater of boiler body and subordinate's air preheater respectively.
Further, gas approach and exhaust pass are external between the second economizer of boiler body and subordinate's air preheater respectively.
Further, the spray ammonia direction of ammonia-spraying grid is in opposite direction with flow of flue gas.Improve the mixed effect of flue gas and ammonia.
The beneficial effects of the utility model are, simple in construction, gas approach and exhaust pass are external in boiler body respectively, economizer in boiler is transferred to the bottom of SCR reactor, thus above subordinate's air preheater vacating space, it is easy to pass in and out the connection of flue, ensure that SCR reactor inlet flue-gas temperature is in the effective active temperature range of catalyst, thus both ensure that the reactivity worth of SCR reactor, reduce the exhaust gas temperature of flue gas, save the energy, decrease again the floor space of device, reduce cost of investment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
In order to make those skilled in the art be better understood from this utility model scheme, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is carried out clear, complete description, obviously, described embodiment is only a part of embodiment of the present utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of this utility model protection.
With reference to shown in Fig. 1, in figure, the direction of arrow is flow of flue gas direction, a kind of SCR denitration reaction unit coupling economizer, the gas approach 2 including SCR denitration reactor 1, being connected to SCR denitration reactor 1 top and be connected to the exhaust pass 3 bottom SCR denitration reactor 1.Gas approach 2 and exhaust pass 3 are outer respectively to be connected on the passage of boiler body.The ammonia-spraying grid 21 having spray ammonia direction in opposite direction with flow of flue gas is connected on gas approach 2, the front connection being positioned at ammonia-spraying grid 21 on gas approach 2 has higher level's air preheater 62, higher level's air preheater 62 can certainly be not provided with, the second economizer is directly set above gas approach 2.It is additionally provided with fairing 5 between this ammonia-spraying grid 21 and SCR denitration reactor 1, is also associated with economizer 4, i.e. economizer 4 between SCR denitration reactor 1 and exhaust pass 3 and is connected to the smoke outlet of SCR denitration reactor 1.The size of economizer 4 is adjusted according to actual demands of engineering, and the size in its cross section depends on the temperature height of SCR denitration reactor outlet flue gas.Connect on exhaust pass 3 and have subordinate's air preheater 61.
Operation principle of the present utility model is, flue gas in boiler body sequentially passes through the second economizer and higher level's air preheater 62 or is directly over higher level's air preheater 62 and flow to ammonia-spraying grid 21, after in flue gas and ammonia-spraying grid 21, the reducing agent of ejection is sufficiently mixed, rectified device 5 enters SCR denitration reactor 1 after being uniformly dispersed, denitration reaction is there is under the effect of catalyst, in after flue gas entrance economizer 4 heat exchange that reaction produces, warp is entered subordinate's air preheater 61 of boiler body by exhaust pass 3, further heat exchange.
Above-mentioned detailed description of the invention is used for illustrating this utility model; rather than this utility model is limited; in spirit of the present utility model and scope of the claims, any modifications and changes that this utility model is made, both fall within protection domain of the present utility model.
Claims (4)
1. the SCR denitration reaction unit coupling economizer, the gas approach (2) including SCR denitration reactor (1), being located at this SCR denitration reactor (1) top and the exhaust pass (3) being located at SCR denitration reactor (1) bottom, ammonia-spraying grid (21) it is provided with in described gas approach (2), it is characterized in that: the smoke outlet of described SCR denitration reactor (1) is provided with economizer (4), the bottom of this economizer (4) is connected with described exhaust pass (3)；Described gas approach (2) and exhaust pass (3) are external in boiler body respectively；Being provided with fairing (5) between described gas approach (2) interior ammonia-spraying grid and SCR denitration reactor (1), this fairing (5) is positioned at the surface of SCR denitration reactor (1).
Reaction unit the most according to claim 1, it is characterised in that: described gas approach (2) and exhaust pass (3) are external between higher level's air preheater (62) of boiler body and subordinate's air preheater (61) respectively.
Reaction unit the most according to claim 1, it is characterised in that: described gas approach (2) and exhaust pass (3) are external between the second economizer of boiler body and subordinate's air preheater (61) respectively.
Reaction unit the most according to claim 1, it is characterised in that: the spray ammonia direction of described ammonia-spraying grid (21) is in opposite direction with flow of flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521038040.1U CN205495348U (en) | 2015-12-15 | 2015-12-15 | SCR denitration reaction device of coupling economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521038040.1U CN205495348U (en) | 2015-12-15 | 2015-12-15 | SCR denitration reaction device of coupling economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205495348U true CN205495348U (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521038040.1U Expired - Fee Related CN205495348U (en) | 2015-12-15 | 2015-12-15 | SCR denitration reaction device of coupling economizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN205495348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621663A (en) * | 2016-12-13 | 2017-05-10 | 浙江嘉化能源化工股份有限公司 | Boiler flue gas treatment device and method |
-
2015
- 2015-12-15 CN CN201521038040.1U patent/CN205495348U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621663A (en) * | 2016-12-13 | 2017-05-10 | 浙江嘉化能源化工股份有限公司 | Boiler flue gas treatment device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170508 Address after: 310012 Xihu District, Hangzhou, Wensanlu Road, China, No., Times Square, block C, layer 2, layer 478 Co-patentee after: Zhejiang University Patentee after: Zhejiang Pyneo Technology Co., Ltd. Address before: 310012 Xihu District, Hangzhou, Wensanlu Road, China, No., Times Square, block C, layer 2, layer 478 Patentee before: Zhejiang Pyneo Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20201215 |