CN208735652U - The eliminating white smoke system that a kind of heat exchanger and air preheater combine - Google Patents
The eliminating white smoke system that a kind of heat exchanger and air preheater combine Download PDFInfo
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- CN208735652U CN208735652U CN201820568650.XU CN201820568650U CN208735652U CN 208735652 U CN208735652 U CN 208735652U CN 201820568650 U CN201820568650 U CN 201820568650U CN 208735652 U CN208735652 U CN 208735652U
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- secondary air
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- flue gas
- heat exchanger
- air
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- 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
Abstract
The utility model discloses a kind of heat exchangers and the eliminating white smoke system that combines of air preheater in environmental protection equipment technical field.Including heat exchanger and air preheater, air preheater and heat exchanger are respectively equipped with input end A1, B1 of a Secondary Air, outlet end A2, B2；Input end A3, B3 of flue gas, outlet end A4, B4.One secondary air inlet end A1 is connected by a secondary air inlet pipe of Secondary Air branch one and one, there is a Secondary Air branch two in one secondary air inlet pipe also branch, one secondary air inlet of Secondary Air branch two and one end B1 is connect, gas inlet end A3 is connect by the first flue gas branch with flue gas inlet tube, there is the second flue gas branch in flue gas inlet tube branch, second flue gas branch is connect with gas inlet end B3, smoke outlet A4 is connect after mixing with smoke outlet B4 with deduster, deduster is connect with desulfurizing tower, and desulfurizing tower is connect after mixing with a Secondary Air outlet end B2 with chimney.The beneficial effects of the utility model are: avoiding low-temperature corrosion, cost is reduced.
Description
Technical field
The utility model relates to environmental protection equipment technical fields, white more particularly to a kind of disappearing for heat-engine plant desulfurized tower outlet cigarette
The system of cigarette.
Background technique
In recent years, with energy-saving index, the raising of environmental requirement, a series of reduction boiler exhaust gas have been put into effect in each place
Temperature and the Policy Conditions for eliminating white cigarette.Heat-engine plant desulfurized tower outlet smoke temperature is 40 DEG C ~ 50 DEG C, direct emission, and water steams in flue gas
Air cooling is solidifying, will form " white cigarette, while cold neat stress has strong corrosivity to chimney and flue, so chimney heavy corrosion
It is continuous to reinforce, and for the prior art, the service life of chimney anticorrosion is extremely limited, must also repeatedly prevent in power plant's duration
Corruption causes maintenance cost high, seriously affects power plant's normal operation.
The method that thermal power plant is used to heat neat stress at present mainly uses MGGH system, and heat medium water is used to pass through suction as medium
The heat of desulfurizing tower entrance original flue gas is received to heat the neat stress of desulfurizing tower outlet, to achieve the purpose that eliminate white cigarette.Due to
MGGH system divides cooling section and again hot arc, and the temperature and pressure to exchange heat are smaller, cause heat-transfer surface larger, and equipment is heavier, and cost of investment is high,
And the heating surface minimum wall temperature of the temperature descending section of MGGH system is nearly all lower than the acid dew-point temperature of flue gas, the heating surface of warming-up section
Again directly contacted with neat stress, heat-transfer surface can nearly all encounter low-temperature corrosion, dust stratification, fouling, leakage the problem of.
Thermal power plant's heat loss due to exhaust gas is the main heat loss of power plant boiler simultaneously, heats neat stress behind absorption tower, is made net
Flue gas is in an overheated state, can effectively improve " white cigarette " phenomenon, and avoid chimney, boiler flue corrosion, is dropped by flue gas heat-exchange unit
Low exhaust gas temperature can efficiently use residual heat from boiler fume, reduce coal consumption, improve economy of power plant benefit.
Utility model content
The purpose of this utility model is to overcome above-mentioned exhaust gas temperatures, and high, chimney emits white cigarette, heat-transfer surface and can encounter
The problems such as low-temperature corrosion, dust stratification, fouling, leakage and the eliminating white smoke system that a kind of heat exchanger and air preheater combine is provided.
Purpose of the utility model is realized as follows: the eliminating white smoke system that a kind of heat exchanger and air preheater combine, packet
The air preheater for including the heat exchanger of the depressed structure of tubular type gas and being heated to a Secondary Air, the air preheater are equipped with a secondary air inlet
A1, a Secondary Air outlet end A2, gas inlet end A3 and smoke outlet A4 are held, the heat exchanger is equipped with a secondary air inlet end
B1, a Secondary Air outlet end B2, gas inlet end B3 and smoke outlet B4, secondary air inlet end A1 pass through one or two times
The secondary air inlet pipe of wind branch one and one connects, and the secondary air inlet pipe also branch is connected with a Secondary Air branch two, institute
It states the secondary air inlet of a Secondary Air branch two and one end B1 to connect, the gas inlet end A3 passes through the first flue gas branch and flue gas
Inlet tube connection, the flue gas inlet tube also branch are connected with the second flue gas branch, the second flue gas branch and gas inlet
It is connect after holding B3 connection, the smoke outlet A4 to mix with smoke outlet B4 by tee tube with deduster input end, institute
It states house outlet end to connect with desulfurizing tower input end, the desulfurizing tower outlet end and a Secondary Air outlet end B2 pass through tee tube
It is connect after mixing with chimney bottom.
When the utility model is used, it is respectively enterd after a Secondary Air is generated by a secondary air fan by a secondary air inlet pipe
One Secondary Air of Secondary Air branch one and one branch two, the Secondary Air in a Secondary Air branch one enter air preheater, a Secondary Air
One Secondary Air of branch two enters heat exchanger, and high-temperature flue gas is generated by boiler, passes through the first flue gas branch respectively by flue gas inlet tube
Road and the second flue gas branch enter in air preheater and heat exchanger, and air preheater enters air preheater using the heat of high-temperature flue gas
One Secondary Air improves inlet air temperature to reduce exhaust gas temperature, and a Secondary Air passes through Secondary Air outlet end A2 row again
Out, flue gas is discharged by the smoke outlet A4 of air preheater, and heat exchanger carries out heat exchange work to high-temperature flue gas and a cold Secondary Air
To make, forms low-temperature flue gas and a hot Secondary Air, high-temperature flue gas is still within acid dew point or more by smoke temperature after first and second air cooling,
Corrosion-free risk, the low-temperature flue gas of heat exchanger discharge are mixed with the flue gas of smoke outlet A4 discharge again, sequentially enter deduster
Cold neat stress is discharged with desulfurizing tower, after cold neat stress is mixed with a Secondary Air outlet end B2 of heat exchanger one Secondary Air of heat being discharged
Import chimney bottom discharge.One Secondary Air of heat that heat exchanger is discharged in the system mixes cold neat stress, makes cold neat stress temperature
Increase it is in an overheated state, when cold neat stress is heated to form hot neat stress, directly by smoke stack emission to atmosphere, reach eliminate it is white
Cigarette and the effect for avoiding flue, chimney corrosion.
The heat exchanger of the depressed structure of tubular type gas in the utility model is using three-dimensional as a further improvement of the utility model,
Fin tube heat exchanger, using three-dimensional rib plate pipe as heat exchange element, three-dimensional rib plate heat exchange of heat pipe changes three-dimensional rib plate heat exchange of heat pipe
The interior outside of heat pipe is equipped with fin, and compared with prior art, it can carry out variable density design to the fin of itself, adjusts wall
Temperature, the cold end wall temperature that can control three-dimensional rib plate heat exchange of heat pipe in this way reach particular value and can avoid low-temperature corrosion, the i.e. tubular type
The poor steel of corrosion resistance can be used without low-temperature corrosion risk in the heat exchanger of the depressed structure of gas, so that equipment investment reduces.
In order to control the size of flue gas influent stream amount, flue gas is installed on the second flue gas branch road and adjusts door, flue gas adjusts door can
Accurately regulated and controled with the usage amount of high-temperature flue gas needed for heat exchanging device, further to adjust the cold neat stress heating of heating
The temperature of required one Secondary Air of heat.
Equally, in order to control the size of a Secondary Air influent stream amount, a Secondary Air tune is installed on a Secondary Air branch two
Section door, a secondary air regulation door can be regulated and controled with the usage amount of a Secondary Air needed for heat exchanging device, and adjustable heating is cold
One Secondary Air usage amount of heat needed for neat stress heating.
Air preheater heats a Secondary Air in the heat using high-temperature flue gas same as a further improvement of the utility model,
When, the low-temperature corrosion for causing air preheater or heat exchanger to generate in order to avoid the temperature of a Secondary Air is too low, in a Secondary Air branch
Increase steam air heater on one or on a secondary air inlet pipe, to carry out preheating work to a Secondary Air.
Connecting tube in order to further provide system operation sufficient motive power, between deduster and desulfurizing tower
It is exported on upper, the second flue gas branch road, a Secondary Air branch two, on the pipeline of smoke outlet B4 outgassing direction with a Secondary Air
It holds and is equipped with blower on the pipeline of B2 outgassing direction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 heat exchanger, 2 flue gases adjusting door, 3 flue gas inlet tubes, 4 air preheaters, 5 steam air heaters, 6 one secondary air inlet pipes,
7 one secondary air regulation doors, 8 dedusters, 9 blowers, 10 desulfurizing towers, 11 chimneys, 12 1 Secondary Air branches one, 13 1 Secondary Air branches
Two, 14 first flue gas branches, 15 second flue gas branches.
Specific embodiment
The eliminating white smoke system that heat exchanger and air preheater as shown in Figure 1 combines, the heat exchanger 1 including the depressed structure of tubular type gas
With the air preheater 4 heated to a Secondary Air, air preheater 4 is equipped with a secondary air inlet end A1, a Secondary Air outlet end A2, cigarette
Gas input end A3 and smoke outlet A4, heat exchanger 1 be equipped with a secondary air inlet end B1, a Secondary Air outlet end B2, flue gas into
Mouthful end B3 and smoke outlet B4, one or two input end A1 are connected with 5 outlet end of steam air heater, and 5 input end of steam air heater passes through one
Secondary Air branch 1 is connect with a secondary air inlet pipe 6, and a secondary air inlet pipe 6 is additionally provided with a Secondary Air branch 2 13, and one
Secondary Air branch 2 13 is connect with a secondary air inlet end B1, and a Secondary Air branch 2 13 is equipped with a secondary air regulation door 7, cigarette
Gas input end A3 is connect by the first flue gas branch 14 with flue gas inlet tube 3, and flue gas inlet tube 3 is additionally provided with the second flue gas branch
15, the second flue gas branch 15 is connect with gas inlet end B3, and the second flue gas branch 15 is equipped with flue gas and adjusts door 2, exhanst gas outlet
End A4 is connect after being mixed with a Secondary Air outlet end B2 by tee tube with 8 input end of deduster, 8 outlet end of deduster and desulfurization
10 input end of tower connection, in the connecting tube between deduster 8 and desulfurizing tower 10,15, one Secondary Air branch on the second flue gas branch road
It is equipped on road 2 13, on the pipeline of smoke outlet B4 outgassing direction and on the pipeline of a Secondary Air outlet end B2 outgassing direction
Blower 9,10 outlet end of desulfurizing tower import 11 bottom of chimney after mixing with a Secondary Air outlet end B2 by tee tube, and from chimney
Top discharge.
When the eliminating white smoke system work that the utility model heat exchanger and air preheater combine, in a secondary air inlet pipe 6
One Secondary Air respectively enters a Secondary Air branch 1 and a Secondary Air branch 2 13 and enters air preheater 4 and heat exchanger 1, flue gas into
High-temperature flue gas in mouth pipe 3 passes through the first flue gas branch 14 respectively and the second flue gas branch 15 enters air preheater 4 and heat exchanger 1
Interior, air preheater 4 enters a Secondary Air of air preheater 4 using the heat of high-temperature flue gas, then passes through a Secondary Air outlet end A2
A Secondary Air is discharged, remaining flue gas is discharged by smoke outlet A4, and heat exchanger 1 carries out high-temperature flue gas and a cold Secondary Air
Heat exchange work, forms low-temperature flue gas and a hot Secondary Air, the low-temperature flue gas of heat exchanger discharge again with the exhanst gas outlet of air preheater
The flue gas mixing for holding A4 discharge, sequentially enters deduster 8 and cold neat stress is discharged in desulfurizing tower 10, in deduster 8 and desulfurizing tower 10
Between connecting tube on, on the second 15, one Secondary Air branch 2 13 of flue gas branch road, the pipeline of smoke outlet B4 outgassing direction
It is equipped with blower 9 on upper and a Secondary Air outlet end B2 outgassing direction pipeline, is used to provide power support, cold neat stress and cigarette
The discharge of 11 bottom of chimney is imported after one Secondary Air of the heat mixing of gas outlet end B4 discharge.The system reaches no low temperature when working rotten
Erosion, the effect of no white cigarette further decrease pollution, save operating cost.
The utility model is not limited to above-described embodiment, for example, steam air heater also can be set in a secondary air inlet pipe
Main pipe rail on, while a preheated Secondary Air is provided air preheater and heat exchanger, in technical side disclosed by the utility model
On the basis of case, for those skilled in the art according to disclosed technology contents, not needing creative labor can be to it
In some technical characteristics make some replacements and deformation, these replacement and deformation it is within the protection scope of the present utility model.
Claims (6)
1. the eliminating white smoke system that a kind of heat exchanger and air preheater combine, which is characterized in that the heat exchange including the depressed structure of tubular type gas
Device and the air preheater heated to a Secondary Air, the air preheater are equipped with a secondary air inlet end A1, a Secondary Air outlet end
A2, gas inlet end A3 and smoke outlet A4, the heat exchanger are equipped with a secondary air inlet end B1, a Secondary Air outlet end
B2, gas inlet end B3 and smoke outlet B4, secondary air inlet end A1 pass through a Secondary Air branch one and one or two times
The connection of wind inlet pipe, the secondary air inlet pipe also branch are connected with a Secondary Air branch two, the Secondary Air branch two
It is connect with a secondary air inlet end B1, the gas inlet end A3 is connect by the first flue gas branch with flue gas inlet tube, described
Flue gas inlet tube also branch is connected with the second flue gas branch, and the second flue gas branch is connect with gas inlet end B3, the cigarette
Gas outlet end A4 and smoke outlet B4 connects after being mixed by tee tube with deduster input end, the house outlet end and
Desulfurizing tower input end connection, the desulfurizing tower outlet end mixed with a Secondary Air outlet end B2 by tee tube after with chimney bottom
Connection.
2. the eliminating white smoke system that a kind of heat exchanger according to claim 1 and air preheater combine, it is characterised in that: described
Heat exchanger uses three-dimensional rib plate heat exchange of heat pipe, and the interior outside of the heat exchanger tube of the three-dimensional rib plate heat exchange of heat pipe is equipped with fin.
3. the eliminating white smoke system that a kind of heat exchanger according to claim 1 and air preheater combine, it is characterised in that: described
Second flue gas branch road is additionally provided with flue gas and adjusts door.
4. the eliminating white smoke system that a kind of heat exchanger according to claim 1 and air preheater combine, it is characterised in that: described
A secondary air regulation door is additionally provided on one Secondary Air branch two.
5. the eliminating white smoke system that a kind of heat exchanger according to claim 1 and air preheater combine, it is characterised in that: also set
There is steam air heater, the steam air heater is located on a secondary air inlet pipe or a Secondary Air branch one.
6. the eliminating white smoke system that a kind of heat exchanger according to claim 1-5 and air preheater combine, feature
Be: in the connecting tube between the deduster and desulfurizing tower, the second flue gas branch road, on a Secondary Air branch two, flue gas goes out
Blower is equipped on the pipeline of mouth end B4 outgassing direction and on the pipeline of a Secondary Air outlet end B2 outgassing direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820568650.XU CN208735652U (en) | 2018-04-20 | 2018-04-20 | The eliminating white smoke system that a kind of heat exchanger and air preheater combine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820568650.XU CN208735652U (en) | 2018-04-20 | 2018-04-20 | The eliminating white smoke system that a kind of heat exchanger and air preheater combine |
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| Publication Number | Publication Date |
|---|---|
| CN208735652U true CN208735652U (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820568650.XU Active CN208735652U (en) | 2018-04-20 | 2018-04-20 | The eliminating white smoke system that a kind of heat exchanger and air preheater combine |
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| CN (1) | CN208735652U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945227A (en) * | 2019-05-08 | 2019-06-28 | 北京国电龙源环保工程有限公司 | Reduce system and process that exhaust gas temperature inhibits air preheater low-temperature corrosion |
| CN110397947A (en) * | 2019-07-05 | 2019-11-01 | 湖南大唐节能科技有限公司 | A kind of air preheater is anti-blocking and enhances heat transfer unit (HTU) |
-
2018
- 2018-04-20 CN CN201820568650.XU patent/CN208735652U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945227A (en) * | 2019-05-08 | 2019-06-28 | 北京国电龙源环保工程有限公司 | Reduce system and process that exhaust gas temperature inhibits air preheater low-temperature corrosion |
| CN110397947A (en) * | 2019-07-05 | 2019-11-01 | 湖南大唐节能科技有限公司 | A kind of air preheater is anti-blocking and enhances heat transfer unit (HTU) |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 225000 No. 1, Hongyuan Road, high end equipment manufacturing industrial park, Shaobo Town, Jiangdu District, Yangzhou City, Jiangsu Province Patentee after: Jiangsu Fengye Environmental Technology Group Co.,Ltd. Address before: 225000 Shaobo town Zhaoguan Jinghang village Jiangdu District Yangzhou City Jiangsu Province Patentee before: JIANGSU FENG YE TECHNOLOGY ENVIRONMENTAL PROTECTION GROUP Co.,Ltd. |