CN208075006U - A kind of air preheater and equipment for denitrifying flue gas and station boiler including it - Google Patents
A kind of air preheater and equipment for denitrifying flue gas and station boiler including it Download PDFInfo
- Publication number
- CN208075006U CN208075006U CN201820151780.3U CN201820151780U CN208075006U CN 208075006 U CN208075006 U CN 208075006U CN 201820151780 U CN201820151780 U CN 201820151780U CN 208075006 U CN208075006 U CN 208075006U
- Authority
- CN
- China
- Prior art keywords
- air preheater
- air
- flue gas
- purger
- heat
- 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.)
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Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000779 smoke Substances 0.000 claims abstract description 19
- 238000010926 purge Methods 0.000 claims description 8
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 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)
- Air Supply (AREA)
Abstract
The utility model provides a kind of air preheater and equipment for denitrifying flue gas and station boiler including it.The air preheater includes air preheater main body, air preheater main body includes the heat transfer element of external shell and enclosure interior package, and cold First air entrance, cold Secondary Air entrance, cold flue gas outlet, heat primary air outlet, the outlet of hot Secondary Air, heat smoke entrance are provided on surface of shell；The pipeline being connected to purger is provided in heat smoke inlet, the outlet end of purger is located at the cold end of heat transfer element.The air preheater of the utility model can effectively prevent the generation of hydrogen sulfate ammonia, reduce the running resistance of air preheater, prevent the corrosion of air heater element.
Description
Technical field
The utility model is related to a kind of air preheaters more particularly to a kind of utilization heat smoke to purge, and remove air preheat
The air preheater of hydrogen sulfate ammonia in device, belongs to gas denitrifying technology field.
Background technology
Station boiler generally uses SCR device to carry out denitrating flue gas, and the flue gas after burning in station boiler passes sequentially through
Enter follow-up flue after SCR denitration device and air preheater, usually used reducing agent is NH in SCR denitration device3, cigarette
Gas in SCR denitration device mainly and NH3Reaction.And flue gas temperature change in SCR denitration device is little, in air preheater
Heat transfer element in the middle heat transfer air preheater by itself, generally makes flue-gas temperature drop to 110 from 300 DEG C -360 DEG C
DEG C -150 DEG C, as shown in Figure 1.
Because SCR device is run, control requires and chemical reaction is incomplete, the NH as reducing agent3Cannot 100% participation
Reaction, has neither part nor lot in the NH of reaction3Enter air preheater, referred to as the escaping of ammonia with flue gas.NH in flue gas3With in flue gas
SO3、H2O、O2Reaction generates NH4HSO3(NH4)2SO4, reactive chemistry equation is：
Ammonium hydrogen sulfate (NH4HSO3) dew point be 147 DEG C, in air preheater, NH4HSO3It can be condensed into liquid from gaseous state
State, forms fusion-crystallization on the heat-transfer surface in air preheater, and the ammonium hydrogen sulfate of liquid has strong viscosity so that in flue gas
Dust covers thereon and forms bulk, blocks the exhaust gases passes of air preheater, increases boiler fan power consumption；Have simultaneously relatively strong
Corrosivity can corrode heat exchange plank and fixing bracket in air preheater.
Existing settling mode is to heat air preheater cold end using heat primary air, to change air preheater cold end liquid sulfuric acid hydrogen
The temperature of the production area of ammonia effectively slows down the cold end of hydrogen sulfate ammonia attachment heat transfer element.But heat primary air is boiler cold one
Secondary wind is heated by air preheater and is obtained, and carries out the heating of hydrogen sulfate ammonia and purging using heat primary air so that energy is in flue gas
(heat)-heat primary air-this transfer route of hydrogen sulfate ammonia is long, and the low heat consumption of transmission efficiency is high, reduces boiler economics.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide one kind can effectivelying prevent air preheat
The cold end of device generates the air preheater of ammonium hydrogen sulfate.
In order to achieve the above technical purposes, the utility model provides a kind of air preheater, which includes：
Air preheater main body, air preheater main body include the heat transfer element of external shell and enclosure interior package,
It is provided with that cold First air entrance, cold Secondary Air entrance, cold flue gas outlet, heat primary air outlet, hot Secondary Air goes out on surface of shell
Mouth, heat smoke entrance；
The pipeline being connected to purger is provided in heat smoke inlet, the outlet end of purger is located at heat transfer element
Cold end.
The outlet end of specific implementation mode according to the present utility model, purger is nozzle.
In above-mentioned air preheater, it is preferable that the air preheater further includes booster fan.
Specific implementation mode according to the present utility model after heat smoke is pressurized by booster fan, makes pressure reach 15kPa-
20kPa。
In above-mentioned air preheater, it is preferable that the company in the purger and heat smoke entrance is arranged in booster fan
On take over line.
In above-mentioned air preheater, it is preferable that purger is telescopic purger.
In above-mentioned air preheater, it is preferable that purger is the telescopic purger of stepping.
Specific implementation mode according to the present utility model, each stepping residence time of the telescopic purger of stepping are more than
The time that air preheater rotates a circle, to realize the purging to air preheater gamut.
In above-mentioned air preheater, it is preferable that a diameter of air preheater main body of stretching of telescopic purger
Radius.
In above-mentioned air preheater, it is preferable that the air preheater is provided with an air duct and secondary air duct.
The utility model additionally provides a kind of equipment for denitrifying flue gas, which includes above-mentioned air preheater；
Air preheater is arranged in the downstream of equipment for denitrifying flue gas.
The utility model additionally provides a kind of station boiler, which includes above-mentioned equipment for denitrifying flue gas.
The air preheater of the utility model from the heat smoke entrance extraction section heat smoke of air preheater (310 DEG C-
360 DEG C), heat smoke is pressurized to 15kPa-20kPa by booster fan, using heat smoke as source purge gas, to air preheater
Cold end purged, heat the cold end of air preheater, avoid hydrogen sulfate ammonia from being condensed on the element of air preheater, together
When, solidification, liquefied hydrogen sulfate ammonia are distilled or are evaporated to again gas, to reduce the running resistance of air preheater, simultaneously
Avoid the corrosion of air heater element.
The air preheater of the utility model can prevent hydrogen sulfate ammonia from generating, and effectively reduce the operation resistance of air preheater
Power prevents the corrosion of air heater element.
The air preheater of the utility model is using heat smoke as source purge gas, the source direct convenience of air source, energy
Using efficient.
The air preheater of the utility model is purged using step-by-step movement, and the area purged every time is small, and the heat smoke of purging is used
Amount is few, and bottom line reduces the influence to boiler system economy.
Description of the drawings
Fig. 1 is the schematic diagram of existing equipment for denitrifying flue gas.
Fig. 2 is the structural schematic diagram of the air preheater of embodiment 1.
Main Reference symbol description
1 booster fan, 2 stepping telescopic 3 nozzle of purger 4 conduit, 5 air preheater main body, 6 air ducts 7
8 heat smoke entrance of secondary air duct
Specific implementation mode
In order to which the technical characteristics of the utility model, purpose and advantageous effect are more clearly understood, now to this practicality
Novel technical solution carry out it is described further below, but should not be understood as to the utility model can practical range restriction.
Embodiment 1
Present embodiments provide a kind of air preheater, structure as shown in Fig. 2, the air preheater heat smoke entrance
Conduit 4 is set at 8, and the other end of conduit 4 connects the telescopic purger 2 of stepping, the nozzle 3 of the telescopic purger of stepping 2
Cold end in air preheater main body 5, the telescopic purger 2 of stepping and setting supercharging wind in the connecting pipeline of conduit 4 are set
An air duct 6 and secondary air duct 7 is arranged in machine 1, the air preheater.
When the above-mentioned air preheater of the utility model is used in particular in denitrating flue gas, from the entrance extracting part of air preheater
Divide flue gas (310 DEG C -360 DEG C), heat smoke is pressurized to 15kPa-20kPa by booster fan, pre- to air as source purge gas
The cold end of hot device is purged, and the cold end of air preheater is heated, and solidification, liquefied hydrogen sulfate ammonia are distilled or are evaporated to again
Gas realizes the removing to hydrogen sulfate ammonia.
Claims (10)
1. a kind of air preheater, which is characterized in that the air preheater includes：
Air preheater main body, the air preheater main body include the heat transfer element of external shell and enclosure interior package,
Be provided on the surface of shell cold First air entrance, cold Secondary Air entrance, cold flue gas outlet, heat primary air outlet, heat it is secondary
Wind outlet, heat smoke entrance；
The heat smoke inlet is provided with the pipeline being connected to purger, the outlet end of the purger is positioned at described
The cold end of heat transfer element.
2. air preheater according to claim 1, which is characterized in that the air preheater further includes booster fan.
3. air preheater according to claim 2, which is characterized in that the booster fan is arranged in the purger
With in the connecting pipeline of heat smoke entrance.
4. air preheater according to claim 1, which is characterized in that the purger is telescopic purger.
5. air preheater according to claim 4, which is characterized in that the purger is that the telescopic purging of stepping is set
It is standby.
6. air preheater according to claim 4, which is characterized in that stretching for the telescopic purger is a diameter of
The radius of the air preheater main body.
7. air preheater according to claim 1, which is characterized in that the air preheater is provided with an air duct and two
Secondary air duct.
8. a kind of equipment for denitrifying flue gas, which is characterized in that the equipment for denitrifying flue gas includes that claim 1-7 any one of them is empty
Air preheater.
9. equipment for denitrifying flue gas according to claim 8, which is characterized in that air preheater is arranged in equipment for denitrifying flue gas
Downstream.
10. a kind of station boiler, which is characterized in that the station boiler includes the equipment for denitrifying flue gas described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820151780.3U CN208075006U (en) | 2018-01-30 | 2018-01-30 | A kind of air preheater and equipment for denitrifying flue gas and station boiler including it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820151780.3U CN208075006U (en) | 2018-01-30 | 2018-01-30 | A kind of air preheater and equipment for denitrifying flue gas and station boiler including it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208075006U true CN208075006U (en) | 2018-11-09 |
Family
ID=64036510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820151780.3U Active CN208075006U (en) | 2018-01-30 | 2018-01-30 | A kind of air preheater and equipment for denitrifying flue gas and station boiler including it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208075006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397948A (en) * | 2019-07-11 | 2019-11-01 | 湖南大唐节能科技有限公司 | A kind of tubular air preheater anti-block apparatus |
-
2018
- 2018-01-30 CN CN201820151780.3U patent/CN208075006U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397948A (en) * | 2019-07-11 | 2019-11-01 | 湖南大唐节能科技有限公司 | A kind of tubular air preheater anti-block apparatus |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |