CN110939929A - Flue gas heat exchange device - Google Patents
Flue gas heat exchange device Download PDFInfo
- Publication number
- CN110939929A CN110939929A CN201911399490.6A CN201911399490A CN110939929A CN 110939929 A CN110939929 A CN 110939929A CN 201911399490 A CN201911399490 A CN 201911399490A CN 110939929 A CN110939929 A CN 110939929A
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- China
- Prior art keywords
- heat exchange
- flue gas
- water
- inner cavity
- outlet
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 239000003546 flue gas Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000000779 smoke Substances 0.000 claims abstract description 38
- 238000004321 preservation Methods 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 abstract description 8
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
- F22D1/38—Constructional features of water and air preheating systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of waste heat utilization, and discloses a flue gas heat exchange device which comprises a flue gas inlet section, a heat exchange chamber, a water storage chamber and a flue gas outlet section which are sequentially connected from front to back; the smoke inlet section is provided with a smoke inlet, a first inner cavity communicated with the smoke inlet is defined in the heat exchange chamber, a second inner cavity is defined in the water storage chamber, the second inner cavity is provided with a water inlet end and a water outlet end, and the smoke outlet section is provided with a smoke outlet; a heat exchange tube assembly is arranged in the first inner cavity, a bent heat exchange channel is limited in the heat exchange tube assembly, and the heat exchange channel is provided with an air inlet and an air outlet; a plurality of second heat exchange tubes are arranged in the second inner cavity, one ends of the second heat exchange tubes are communicated with the first inner cavity, and the other ends of the second heat exchange tubes are communicated with the smoke outlet. The invention has the beneficial effects that: the waste heat of the flue gas can be fully utilized, the temperature of the discharged flue gas is reduced, and the purposes of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to the technical field of waste heat utilization, in particular to a flue gas heat exchange device.
Background
It is well known that the heat loss of the exhaust smoke of a boiler is a major part of the heat loss of the boiler. The exhaust gas temperature of boilers in some thermal power plants reaches 400-500 ℃, and the exhaust gas temperature of common natural gas boilers also reaches about 210 ℃, so that a large amount of heat energy generated by fuel combustion is taken away by high-temperature flue gas; in addition, even if the flue gas after heat exchange by the air preheater has a temperature higher than 100 ℃, the flue gas carries a large amount of heat energy. Therefore, how to reduce the exhaust gas temperature and fully utilize the residual heat of the exhaust gas to achieve better energy-saving and emission-reduction effects is an urgent problem at present.
Disclosure of Invention
The purpose of the invention is: the flue gas heat exchange device can effectively utilize the waste heat of flue gas and realize energy conservation and emission reduction.
In order to achieve the aim, the invention provides a flue gas heat exchange device which comprises a flue gas inlet section, a heat exchange chamber, a water storage chamber and a flue gas outlet section which are sequentially connected from front to back;
the smoke inlet section is provided with a smoke inlet, a first inner cavity communicated with the smoke inlet is defined in the heat exchange chamber, a second inner cavity is defined in the water storage chamber, the second inner cavity is provided with a water inlet end and a water outlet end, and the smoke outlet section is provided with a smoke outlet;
a heat exchange tube assembly is arranged in the first inner cavity, a bent heat exchange channel is limited in the heat exchange tube assembly, and the heat exchange channel is provided with an air inlet and an air outlet;
a plurality of second heat exchange tubes are arranged in the second inner cavity, one ends of the second heat exchange tubes are communicated with the first inner cavity, and the other ends of the second heat exchange tubes are communicated with the smoke outlet.
Preferably, the heat exchange tube assembly extends from back to front, the air inlet is located at the back end of the first inner cavity, and the air outlet is located at the front end of the first inner cavity.
As a preferable scheme, the heat exchange tube assembly comprises a plurality of heat exchange units, each heat exchange unit comprises a plurality of first heat exchange tubes which are arranged vertically to the flow direction of the flue gas, two ends of each first heat exchange tube are respectively an air inlet end and an air outlet end, the air inlet end of each first heat exchange tube in the heat exchange unit positioned at the rearmost side forms the air inlet, the air outlet end of each first heat exchange tube in the heat exchange unit positioned at the foremost side forms the air outlet,
the heat exchange chamber is internally limited with a plurality of mixed flow cavities, except the air inlet and the air outlet, the air outlet end of each first heat exchange tube in the heat exchange unit is communicated with the air inlet end of each first heat exchange tube in the heat exchange unit adjacent to the front side of the heat exchange unit through the same mixed flow cavity.
Preferably, the water inlet is located at the rear end of the second inner cavity, and the water outlet is located at the front end of the second inner cavity.
Preferably, a heat exchange fin is arranged outside the second heat exchange tube.
Preferably, the heat exchange fin extends spirally along the axial direction of the second heat exchange tube.
As a preferred scheme, heat preservation layers are arranged on the side walls of the heat exchange chamber and the water storage chamber.
As a preferred scheme, the flue gas heat exchange device further comprises a water replenishing tank and a heat preservation water tank, a water outlet of the water replenishing tank is communicated with a water inlet end of the water storage chamber, a water inlet of the heat preservation water tank is communicated with a water outlet end of the water storage chamber, and a water outlet of the heat preservation water tank is communicated with water using equipment.
As a preferred scheme, a valve is arranged on a pipeline for communicating the heat-preservation water tank with the water storage chamber, the flue gas heat exchange device further comprises a control unit, a liquid level sensor is arranged in the heat-preservation water tank, and the control unit is electrically connected with the liquid level sensor and the valve.
Preferably, a temperature sensor and an electric heater are arranged in the heat-preservation water tank, and the control unit is electrically connected with the temperature sensor and the electric heater.
Compared with the prior art, the flue gas heat exchange device provided by the embodiment of the invention has the beneficial effects that:
the flue gas heat exchange device comprises a heat exchange chamber and a water storage chamber, wherein the heat exchange chamber and the water storage chamber are respectively used for heating air and water, after high-temperature flue gas enters from a smoke inlet, the high-temperature flue gas exchanges heat with air flowing through the interior of a heat exchange pipe assembly in the heat exchange chamber, the flue gas after heat exchange becomes middle-low temperature flue gas, the middle-low temperature flue gas flows into a second heat exchange pipe and then exchanges heat with water in the water storage chamber to heat the water in a heat storage chamber, and finally the low-temperature flue gas is discharged from a smoke outlet; by adopting the flue gas heat exchange device, the waste heat of the flue gas can be fully utilized, the temperature of the discharged flue gas is reduced, and the purposes of energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas heat exchange device in an embodiment of the invention.
In the figure, 1, a smoke inlet section; 11. a smoke inlet; 2. a heat exchange chamber; 21. a first lumen; 22. a mixing chamber; 3. a reservoir chamber; 31. a second lumen; 311. a water inlet end; 312. a water outlet end; 4. a smoke discharging section; 41. a smoke outlet; 5. a heat exchange tube assembly; 51. a heat exchange unit; 511. a first heat exchange tube; 52. an air inlet; 53. an air outlet; 6. a second heat exchange tube; 7. heat exchange fins; 8. a water replenishing tank; 9. a heat preservation water tank; 10. a valve; 20. a control unit; 30. a liquid level sensor; 40. a temperature sensor; 50. an electric heater.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
In addition, it should be noted that, in the present embodiment, along the direction of the smoke flow, the smoke flows through the front end first, and the smoke flows through the back end later.
As shown in fig. 1, a flue gas heat exchange device according to a preferred embodiment of the present invention includes a flue gas inlet section 1, a heat exchange chamber 2, a water storage chamber 3, and a flue gas outlet section 4, which are sequentially connected from front to back; the smoke inlet section 1 is provided with a smoke inlet 11, a first inner cavity 21 communicated with the smoke inlet 11 is defined in the heat exchange chamber 2, a second inner cavity 31 is defined in the water storage chamber 3, the second inner cavity 31 is provided with a water inlet end 311 and a water outlet end 312, and the smoke outlet section 4 is provided with a smoke outlet 41; a heat exchange tube assembly 5 is arranged in the first inner cavity 21, a bent heat exchange channel is defined in the heat exchange tube assembly 5, and the heat exchange channel is provided with an air inlet 52 and an air outlet 53; a plurality of second heat exchange tubes 6 are arranged in the second inner cavity 31, one ends of the second heat exchange tubes 6 are communicated with the first inner cavity 21, and the other ends of the second heat exchange tubes 6 are communicated with the smoke outlet 41.
Based on the technical scheme, the operation process of the flue gas heat exchange device is as follows: high-temperature flue gas enters the first inner cavity 21 of the heat exchange chamber 2 from the flue gas inlet 11, firstly exchanges heat with air, low-temperature air enters the heat exchange tube assembly 5 from the air inlet 52, flows along the heat exchange channel, exchanges heat with the high-temperature flue gas, and then is changed into hot air which flows out of the air outlet 53 and enters the hearth to participate in combustion; the high-temperature flue gas is changed into medium-low temperature flue gas after heat exchange in the heat exchange chamber, the medium-low temperature flue gas enters the second heat exchange tube 6 to exchange heat with water in the second inner cavity 31, and the water can further absorb the waste heat of the flue gas to change into hot water; eventually, the smoke is discharged from the smoke outlet 41.
The flue gas heat exchange device in the embodiment can fully utilize the waste heat of high-temperature flue gas, obviously reduce the temperature of discharged flue gas, and achieve the purposes of energy conservation and emission reduction.
In an exemplary embodiment, the heat exchange chamber 2 and the water storage chamber 3 are cylindrical with the same outer diameter, and the smoke inlet section 1 and the smoke outlet section 4 are both circular truncated cones, as shown in fig. 1.
In order to optimize the heat exchange efficiency, in the present embodiment, the heat exchange tube assembly 5 extends from back to front, the air inlet 52 is located at the back end of the first inner cavity 21, and the air outlet 53 is located at the front end of the first inner cavity 21; the air and the high-temperature flue gas form reverse flow.
In this embodiment, specifically, the heat exchange tube assembly 5 includes a plurality of heat exchange units 51, the heat exchange units 51 include a plurality of first heat exchange 511 tubes arranged perpendicular to the flow direction of the flue gas, the two ends of the first heat exchange tube 511 are respectively an air inlet end and an air outlet end, the air inlet end of each first heat exchange tube 511 in the heat exchange unit 51 positioned at the rearmost side forms the air inlet 52, the air outlet end of each first heat exchange tube 511 in the heat exchange unit 51 positioned at the foremost side forms the air outlet 53, a plurality of mixing chambers 22 are defined inside the heat exchange chamber 2, and except for the air inlet 52 and the air outlet 53, the air outlet end of each first heat exchange tube 511 in the heat exchange unit 51 is communicated with the air inlet end of each first heat exchange tube 511 in the heat exchange unit 51 adjacent to the front side of the heat exchange unit through the same flow mixing cavity 22, so that the heat exchange channel is integrally in an s shape; based on the structure of the heat exchange assembly 5, after heat exchange, air of each first heat exchange tube 511 in the same heat exchange unit 51 flows to the mixing chamber 22 for mixing, and then flows into each first heat exchange tube 511 in the next heat exchange unit 51 for heat exchange, so that overlarge temperature deviation between heat exchange air in different first heat exchange tubes 511 can be avoided.
As shown in fig. 1, in this embodiment, each heat exchange unit 51 includes 4 first heat exchange tubes; two mixed flow cavities 22 are arranged on the upper side of the heat exchange chamber 2, and one mixed flow cavity 22 is arranged on the lower side of the heat exchange chamber 5.
In this embodiment, in order to ensure the temperature of the water discharged from the water outlet end 312, the water inlet end 311 is located at the rear end of the second inner cavity 31, and the water outlet end 312 is located at the front end of the second inner cavity 31.
Because the flue gas flowing into the water storage chamber 3 is medium-low temperature flue gas, the temperature of the flue gas is relatively low, and in order to enhance the heat exchange efficiency, the heat exchange fins 7 are arranged outside the second heat exchange tube 6, so that the heat exchange area of the second heat exchange tube 6 can be increased; illustratively, heat exchange fins 7 are welded to the exterior of the second heat exchange tube 6.
Preferably, the heat exchange fin 7 in the present embodiment extends spirally along the axial direction of the second heat exchange tube 6.
In this embodiment, heat transfer chamber 2 reaches all be provided with the heat preservation on the lateral wall of water storage chamber 3, can effectively keep warm, prevent that the heat from dispersing.
Referring to fig. 1 again, the flue gas heat exchange device further comprises a water replenishing tank 8 and a heat preservation tank 9, a water outlet of the water replenishing tank 8 is communicated with a water inlet end 311 of the water storage chamber 3, a water inlet of the heat preservation tank 9 is communicated with a water outlet end 212 of the water storage chamber 3, and a water outlet of the heat preservation tank 9 is communicated with water using equipment; when the water in the water storage chamber 3 is heated to a certain temperature, the hot water is stored in the heat preservation water tank 9 for heat preservation, and the water supply equipment takes the hot water.
In this embodiment, in order to realize automatic control, a valve 10 is arranged on a pipeline communicating the heat-preservation water tank 9 with the water storage chamber 3, the flue gas heat exchange device further comprises a control unit 20, a liquid level sensor 30 is arranged in the heat-preservation water tank 10, and the control unit 20 is electrically connected with the liquid level sensor 30 and the valve 10; when the liquid level sensor 30 detects that the water level in the heat preservation water tank 9 is too low, the water level is fed back to the control unit 20, and the control unit 20 controls the valve 10 to be opened to supplement water for the heat preservation water tank 9.
In addition, in order to further realize automatic control, a temperature sensor 40 and an electric heater 50 are arranged in the heat preservation water tank 9, and the control unit 20 is electrically connected with the temperature sensor 40 and the electric heater 50; when the temperature sensor 40 detects that the temperature of the hot water in the holding water tank 9 does not reach the preset temperature (for example, 80 ℃), the domestic hot water is not supplied enough, and the control unit 20 controls the electric heating pipe 50 to assist in heating.
To sum up, the embodiment of the invention provides a flue gas heat exchange device, which comprises a heat exchange chamber and a water storage chamber, wherein the heat exchange chamber and the water storage chamber are respectively used for heating air and water, after high-temperature flue gas enters from a flue gas inlet, the high-temperature flue gas exchanges heat with air flowing through the interior of a heat exchange tube assembly in the heat exchange chamber, the flue gas after heat exchange becomes medium-low temperature flue gas, the medium-low temperature flue gas flows into a second heat exchange tube and then exchanges heat with water in the water storage chamber, the water in a heat storage chamber is heated, and finally the low-temperature flue gas is discharged; by adopting the flue gas heat exchange device, the waste heat of the flue gas can be fully utilized, the temperature of the discharged flue gas is reduced, and the purposes of energy conservation and emission reduction are achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A flue gas heat exchange device is characterized by comprising a flue gas inlet section, a heat exchange chamber, a water storage chamber and a flue gas outlet section which are sequentially connected from front to back;
the smoke inlet section is provided with a smoke inlet, a first inner cavity communicated with the smoke inlet is defined in the heat exchange chamber, a second inner cavity is defined in the water storage chamber, the second inner cavity is provided with a water inlet end and a water outlet end, and the smoke outlet section is provided with a smoke outlet;
a heat exchange tube assembly is arranged in the first inner cavity, a bent heat exchange channel is limited in the heat exchange tube assembly, and the heat exchange channel is provided with an air inlet and an air outlet;
a plurality of second heat exchange tubes are arranged in the second inner cavity, one ends of the second heat exchange tubes are communicated with the first inner cavity, and the other ends of the second heat exchange tubes are communicated with the smoke outlet.
2. The flue gas heat exchange device of claim 1, wherein the heat exchange tube assembly extends from rear to front, the gas inlet is located at the rear end of the first interior chamber, and the gas outlet is located at the front end of the first interior chamber.
3. The flue gas heat exchange device according to claim 2, wherein the heat exchange tube assembly comprises a plurality of heat exchange units, each heat exchange unit comprises a plurality of first heat exchange tubes arranged perpendicular to the flow direction of the flue gas, the two ends of each first heat exchange tube are respectively a gas inlet end and a gas outlet end, the gas inlet end of each first heat exchange tube in the heat exchange unit positioned at the rearmost side forms the gas inlet, the gas outlet end of each first heat exchange tube in the heat exchange unit positioned at the foremost side forms the gas outlet,
the heat exchange chamber is internally limited with a plurality of mixed flow cavities, except the air inlet and the air outlet, the air outlet end of each first heat exchange tube in the heat exchange unit is communicated with the air inlet end of each first heat exchange tube in the heat exchange unit adjacent to the front side of the heat exchange unit through the same mixed flow cavity.
4. The flue gas heat exchange device of claim 1, wherein the water inlet end is located at the rear end of the second inner cavity, and the water outlet end is located at the front end of the second inner cavity.
5. The flue gas heat exchange device of claim 1, wherein the second heat exchange tube is externally provided with heat exchange fins.
6. The flue gas heat exchange device of claim 5, wherein the heat exchange fins extend helically along the axial direction of the second heat exchange tubes.
7. The flue gas heat exchange device of claim 1, wherein the side walls of the heat exchange chamber and the water storage chamber are provided with insulating layers.
8. The flue gas heat exchange device according to any one of claims 1 to 7, further comprising a water replenishing tank and a heat preservation tank, wherein a water outlet of the water replenishing tank is communicated with a water inlet end of the water storage chamber, a water inlet of the heat preservation tank is communicated with a water outlet end of the water storage chamber, and a water outlet of the heat preservation tank is communicated with water using equipment.
9. The flue gas heat exchange device according to claim 8, wherein a valve is arranged on a pipeline communicating the heat-preservation water tank and the water storage chamber, the flue gas heat exchange device further comprises a control unit, a liquid level sensor is arranged in the heat-preservation water tank, and the control unit is electrically connected with the liquid level sensor and the valve.
10. The flue gas heat exchange device according to claim 8, wherein a temperature sensor and an electric heater are arranged in the heat-preservation water tank, and the control unit is electrically connected with the temperature sensor and the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399490.6A CN110939929A (en) | 2019-12-27 | 2019-12-27 | Flue gas heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399490.6A CN110939929A (en) | 2019-12-27 | 2019-12-27 | Flue gas heat exchange device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110939929A true CN110939929A (en) | 2020-03-31 |
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ID=69912629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911399490.6A Pending CN110939929A (en) | 2019-12-27 | 2019-12-27 | Flue gas heat exchange device |
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| CN (1) | CN110939929A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902212A (en) * | 2021-01-28 | 2021-06-04 | 广州智光节能有限公司 | Intelligent heat exchange device for boiler flue gas |
| CN115163327A (en) * | 2022-03-09 | 2022-10-11 | 长沙理工大学 | Device for improving heat exchange effect of external heat source of Stirling engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893402A (en) * | 2010-07-16 | 2010-11-24 | 重庆智得热工工业有限公司 | Heat accumulating type flue gas waste heat recovery device |
| CN104654273A (en) * | 2013-11-25 | 2015-05-27 | 杨双来 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
| CN105806110A (en) * | 2016-06-05 | 2016-07-27 | 连云港正航电力节能技术有限公司 | Efficient spiral fin heat exchange device |
| CN109099731A (en) * | 2018-08-03 | 2018-12-28 | 重庆澳来思节能科技有限公司 | Off-gas recovery condenser system |
| CN211694837U (en) * | 2019-12-27 | 2020-10-16 | 广州智光节能有限公司 | Flue gas heat exchange device |
-
2019
- 2019-12-27 CN CN201911399490.6A patent/CN110939929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893402A (en) * | 2010-07-16 | 2010-11-24 | 重庆智得热工工业有限公司 | Heat accumulating type flue gas waste heat recovery device |
| CN104654273A (en) * | 2013-11-25 | 2015-05-27 | 杨双来 | Boiler tail portion smoke heat energy recovery and low-temperature sulfur removal device and method |
| CN105806110A (en) * | 2016-06-05 | 2016-07-27 | 连云港正航电力节能技术有限公司 | Efficient spiral fin heat exchange device |
| CN109099731A (en) * | 2018-08-03 | 2018-12-28 | 重庆澳来思节能科技有限公司 | Off-gas recovery condenser system |
| CN211694837U (en) * | 2019-12-27 | 2020-10-16 | 广州智光节能有限公司 | Flue gas heat exchange device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902212A (en) * | 2021-01-28 | 2021-06-04 | 广州智光节能有限公司 | Intelligent heat exchange device for boiler flue gas |
| CN115163327A (en) * | 2022-03-09 | 2022-10-11 | 长沙理工大学 | Device for improving heat exchange effect of external heat source of Stirling engine |
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