CN213019720U - Flue gas waste heat recovery system - Google Patents
Flue gas waste heat recovery system Download PDFInfo
- Publication number
- CN213019720U CN213019720U CN202022008325.8U CN202022008325U CN213019720U CN 213019720 U CN213019720 U CN 213019720U CN 202022008325 U CN202022008325 U CN 202022008325U CN 213019720 U CN213019720 U CN 213019720U
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- CN
- China
- Prior art keywords
- gas
- pipeline
- flue gas
- flow channel
- heat exchanger
- 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.)
- Expired - Fee Related
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003546 flue gas Substances 0.000 title claims abstract description 50
- 238000011084 recovery Methods 0.000 title claims abstract description 23
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims description 19
- 239000002737 fuel gas Substances 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000003020 moisturizing effect Effects 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
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- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model provides a flue gas waste heat recovery system, which relates to the field of flue gas treatment, and comprises a gas-liquid heat exchanger, a gas-gas heat exchanger, a chimney and a heating mechanism, wherein the gas pipeline and the gas inlet pipeline of the utility model are respectively introduced with gas and air to be fully combusted in a combustion furnace, the heat of combustion is mainly used for heating circulating water in a heat medium pipeline, high-temperature flue gas preliminarily heats circulating cold water in the gas-liquid heat exchanger, and the high-temperature flue gas in the high-temperature flue gas realizes preliminary cooling and preliminary recovery of waste heat; the high-temperature flue gas enters the gas-gas heat exchanger, the high-temperature flue gas is used for heating air introduced into the combustion furnace, the heated hot air can improve the combustion efficiency of fuel gas, and the waste heat recovery system not only realizes the efficient recovery of the waste heat of the high-temperature flue gas, but also can greatly reduce the generation of white smoke.
Description
Technical Field
The utility model relates to a flue gas field of handling especially relates to a flue gas waste heat recovery system.
Background
The heat supply is extremely common for northern areas, a heat supply station consumes a large amount of coal resources to heat circulating hot water, and warmth is brought to thousands of households, but because coal is combusted, a large amount of pollution particles such as dust and the like are inevitably released, serious environmental pollution is easily caused, so that the country strongly advocates using fuel gas to supply heat, but a large amount of high-temperature water vapor and carbon dioxide gas are generated during fuel gas heat supply, the high-temperature gas is basically and directly discharged into the air, but the direct discharge of the high-temperature water vapor and the carbon dioxide gas not only causes great waste of energy, but also causes serious white feather because the moisture contained in the flue gas is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a flue gas waste heat recovery system, this waste heat recovery system has not only realized the waste heat of high-temperature flue gas of high-efficient recovery, can greatly reduce the generation of flue gas white feather moreover.
The utility model discloses a realize through following technical scheme: a flue gas waste heat recovery system comprises a gas-liquid heat exchanger, a gas-gas heat exchanger, a chimney and a heating mechanism, wherein the heating mechanism comprises a refrigerant pipeline and a heat medium pipeline, the front end of the heat medium pipeline is connected with a water outlet of a combustion furnace, the rear end of the heat medium pipeline is connected with a water inlet of a pipeline of a user unit, the front end of the refrigerant pipeline is connected with a water outlet of the pipeline of the user unit, the rear end of the refrigerant pipeline is connected with a water inlet of the combustion furnace, a flue gas outlet of the combustion furnace is connected with a smoke exhaust pipeline, the combustion furnace is respectively connected with a gas inlet pipeline and a gas pipeline, the gas-liquid heat exchanger comprises a flue gas flow channel and a liquid flow channel for heat exchange, the flue gas flow channel is communicated with the smoke exhaust pipeline, the liquid flow channel is communicated with the refrigerant pipeline, the air flow passage is communicated with the air inlet pipeline, the heating medium flow passage is communicated with the smoke exhaust pipeline, and the tail end of the smoke exhaust pipeline is connected with the chimney.
According to the above technical scheme, preferably, heating mechanism still includes moisturizing subassembly, and the moisturizing subassembly includes storage water tank, moisturizing pipeline and inlet tube, and the both ends of moisturizing pipeline are linked together with storage water tank and refrigerant pipeline respectively, and the inlet tube is connected with the water inlet of storage water tank.
According to the technical scheme, preferably, a standby pipeline is connected to the air inlet pipeline in parallel.
According to the above technical solution, preferably, the gas-gas heat exchanger includes a plurality of sets of spiral corrugated plates, and the air flow channel and the heat medium flow channel are respectively located on two sides of the corrugated plates.
According to the above technical solution, preferably, the front ends of the air inlet duct and the spare duct are connected with a blower.
The utility model has the advantages that: the utility model discloses a gas pipeline and admission line let in gas and air respectively, fully burn in the combustion furnace, the main heat of burning is used for heating the circulating water in the heat medium pipeline, remaining high temperature flue gas is the cold water of preliminary heating circulation in gas-liquid heat exchanger, the high temperature flue gas in the high temperature flue gas realizes preliminary cooling this moment, realizes waste heat preliminary recovery; the high-temperature flue gas enters the gas-gas heat exchanger, the high-temperature flue gas is used for heating air introduced into the combustion furnace, the heated hot air can improve the combustion efficiency of fuel gas, and the waste heat recovery system not only realizes the efficient recovery of the waste heat of the high-temperature flue gas, but also can greatly reduce the generation of white smoke.
Drawings
Fig. 1 shows a schematic structural diagram according to an embodiment of the present invention.
In the figure: 1. a gas-liquid heat exchanger; 2. a gas-gas heat exchanger; 3. a chimney; 4. a heating mechanism; 5. a refrigerant pipe; 6. a heat medium pipe; 7. a water replenishing assembly; 8. a subscriber unit; 9. a water storage tank; 10. a water replenishing pipeline; 11. a water inlet pipe; 12. an air intake duct; 13. a gas pipeline; 14. a pressure sensor; 15. a standby pipeline; 16. a blower; 17. a combustion furnace; 18. a smoke exhaust pipeline.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in the figures, the utility model provides a flue gas waste heat recovery system, including gas-liquid heat exchanger 1, gas-gas heat exchanger 2, chimney 3 and heating mechanism 4, wherein heating mechanism 4 includes refrigerant pipeline 5, heat medium pipeline 6 and moisturizing subassembly 7, the front end of heat medium pipeline 6 is connected with the delivery port of burning furnace 17, the rear end of heat medium pipeline 6 links up with the water inlet of the pipeline of subscriber unit 8, the front end of refrigerant pipeline 5 links up with the delivery port of the pipeline of subscriber unit 8, the rear end of refrigerant pipeline 5 is connected with the water inlet of burning furnace 17, and moisturizing subassembly 7 includes storage water tank 9, moisturizing pipeline 10 and inlet tube 11, the both ends of moisturizing pipeline 10 are linked up with storage water tank 9 and refrigerant pipeline 5 respectively, inlet tube 11 is connected with the water inlet of storage water tank 9, be equipped with level sensor in the storage water tank 9, level sensor is used for detecting the height of the liquid level in the storage, the water replenishing assembly 7 is used for replenishing circulating water and guaranteeing the water quantity and water pressure of the circulating water, a smoke exhaust pipeline 18 is connected to a smoke outlet of the combustion furnace 17, the combustion furnace 17 is connected with an air inlet pipeline 12 and a gas pipeline 13 respectively, the gas-liquid heat exchanger 1 comprises a heat exchange smoke flow channel and a heat medium flow channel, the smoke flow channel is communicated with the smoke exhaust pipeline 18, the liquid flow channel is communicated with the refrigerant pipeline 5, the gas-liquid heat exchanger 2 is located behind the gas-liquid heat exchanger 1, the gas-gas heat exchanger 2 comprises a heat exchange air flow channel and a heat medium flow channel, the air flow channel is communicated with the air inlet pipeline 12, the heat medium flow channel is communicated with the smoke exhaust pipeline.
The working process is as follows:
outside air enters the combustion furnace 17 through the air inlet pipeline 12, and meanwhile, gas enters the combustion furnace 17 through the gas pipeline 13; the main heat of combustion is used for heating circulating water in the heat medium pipeline 6, and the residual high-temperature flue gas enters the smoke exhaust pipeline 18; the flue gas firstly passes through the gas-liquid heat exchanger 1, the flue gas flows through a flue gas flow passage, circulating water in the refrigerant pipeline 5 flows through a liquid flow passage, and primary heat exchange is completed; the cooled high-temperature flue gas continuously flows forwards and then enters the gas-gas heat exchanger 2, the high-temperature flue gas is used for heating air introduced into the combustion furnace 17, the heated cold air can improve the combustion efficiency of the fuel gas, and part of steam in the flue gas is condensed in the gas-gas heat exchanger 2 along with the cooling of the flue gas, so that the humidity of the flue gas is greatly reduced, and the generation of white smoke is further reduced.
According to the above embodiment, preferably, the pressure sensor 14 is disposed on the refrigerant channel, and the pressure sensor 14 is configured to detect the pressure of the circulating water in the refrigerant channel.
According to the above embodiment, it is preferable that the inlet duct 12 is connected in parallel with a spare duct 15, and when the gas-liquid heat exchanger 1 is damaged or overhauled, the spare duct 15 can be activated to ensure that the combustion furnace 17 can continuously operate.
According to the above embodiment, preferably, the gas-gas heat exchanger 2 comprises a plurality of sets of spiral corrugated plates, the air flow channel and the heat medium flow channel are respectively located on two sides of each corrugated plate, the heat transfer efficiency of the corrugated plates is high, and the heat exchange efficiency can be improved.
Further, the front ends of the air inlet pipeline 12 and the standby pipeline 15 are connected with an air blower 16, and the air blower 16 can increase the air inlet volume and ensure the full combustion of fuel gas.
The utility model has the advantages that: the gas pipeline 13 and the gas inlet pipeline 12 of the utility model are respectively filled with gas and air, and are fully combusted in the combustion furnace 17, the main heat of the combustion is used for heating the circulating water in the heat medium pipeline 6, the residual high-temperature flue gas is used for primarily heating the circulating cold water in the gas-liquid heat exchanger 1, and the high-temperature flue gas in the high-temperature flue gas is primarily cooled at the moment, so that the primary recovery of waste heat is realized; the high-temperature flue gas enters the gas-gas heat exchanger 2 again, the high-temperature flue gas is used for heating the air introduced into the combustion furnace 17 at the moment, the heated hot air can improve the combustion efficiency of the fuel gas, and the waste heat recovery system not only realizes the high-efficiency recovery of the waste heat of the high-temperature flue gas, but also can greatly reduce the generation of white smoke.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A flue gas waste heat recovery system is characterized by comprising a gas-liquid heat exchanger, a gas-gas heat exchanger, a chimney and a heating mechanism, wherein the heating mechanism comprises a refrigerant pipeline and a heat medium pipeline, the front end of the heat medium pipeline is connected with a water outlet of a combustion furnace, the rear end of the heat medium pipeline is connected with a water inlet of a pipeline of a user unit, the front end of the refrigerant pipeline is connected with a water outlet of the pipeline of the user unit, the rear end of the refrigerant pipeline is connected with a water inlet of the combustion furnace, a flue gas outlet of the combustion furnace is connected with a smoke exhaust pipeline, meanwhile, the combustion furnace is respectively connected with a gas inlet pipeline and a gas pipeline, the gas-liquid heat exchanger comprises a flue gas flow channel and a liquid flow channel for heat exchange, the flue gas flow channel is communicated with the smoke exhaust pipeline, the liquid flow channel is communicated with the refrigerant, the gas-gas heat exchanger comprises a heat exchange air flow channel and a heat medium flow channel, the air flow channel is communicated with an air inlet pipeline, the heat medium flow channel is communicated with a smoke exhaust pipeline, and the tail end of the smoke exhaust pipeline is connected with a chimney.
2. The flue gas waste heat recovery system of claim 1, wherein the heating mechanism further comprises a water replenishing assembly, the water replenishing assembly comprises a water storage tank, a water replenishing pipeline and a water inlet pipe, two ends of the water replenishing pipeline are respectively communicated with the water storage tank and a refrigerant pipeline, and the water inlet pipe is connected with a water inlet of the water storage tank.
3. The flue gas waste heat recovery system according to claim 2, wherein a spare pipeline is connected in parallel to the air inlet pipeline.
4. The flue gas waste heat recovery system according to claim 3, wherein the gas-gas heat exchanger comprises a plurality of sets of spiral corrugated plates, and the air flow channel and the heat medium flow channel are respectively located on two sides of each corrugated plate.
5. The flue gas waste heat recovery system according to claim 4, wherein the front ends of the air inlet pipeline and the standby pipeline are connected with a blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008325.8U CN213019720U (en) | 2020-09-15 | 2020-09-15 | Flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008325.8U CN213019720U (en) | 2020-09-15 | 2020-09-15 | Flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213019720U true CN213019720U (en) | 2021-04-20 |
Family
ID=75476249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022008325.8U Expired - Fee Related CN213019720U (en) | 2020-09-15 | 2020-09-15 | Flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213019720U (en) |
-
2020
- 2020-09-15 CN CN202022008325.8U patent/CN213019720U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210420 |