CN211926544U - Boiler flue gas recovery device - Google Patents
Boiler flue gas recovery device Download PDFInfo
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- CN211926544U CN211926544U CN201922419525.XU CN201922419525U CN211926544U CN 211926544 U CN211926544 U CN 211926544U CN 201922419525 U CN201922419525 U CN 201922419525U CN 211926544 U CN211926544 U CN 211926544U
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- heat exchange
- flue gas
- exchange medium
- heat transfer
- transfer medium
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model discloses a boiler flue gas recovery unit, including pipe case, first UNICOM case and second UNICOM case, pipe case is equipped with flue gas inlet, exhanst gas outlet, heat transfer medium import and heat transfer medium export, is equipped with the heat exchange tube in the pipe case, and the inside heat transfer medium runner that forms of heat exchange tube, the heat exchange tube outside form the flue gas runner, the flue gas runner respectively with flue gas inlet and exhanst gas outlet connect, heat transfer medium runner include first heat transfer medium runner, second heat transfer medium runner and third heat transfer medium runner, and the heat transfer medium import is connected with first heat transfer medium runner, first heat transfer medium runner through first UNICOM case with second heat transfer medium runner is connected, third heat transfer medium runner through second UNICOM case with second heat transfer medium runner is connected, and the heat transfer medium export is connected with third heat transfer medium runner. The device can effectively improve the recovery efficiency of flue gas and the heat exchange efficiency of boiler.
Description
Technical Field
The utility model relates to a boiler technical field especially relates to a boiler flue gas recovery unit.
Background
The existing gas industrial boiler generally adopts a single-channel water supply preheating type flue gas recovery device for tail flue gas recovery. After some steam equipment is used, steam condensate can be recycled, the temperature of the condensate is generally about 100 ℃, a single-channel water supply preheating type flue gas recovery device is adopted, the contact time of flue gas and a heat exchange medium is short, the temperature difference between the flue gas and the medium is small, the flue gas recovery efficiency is poor, the temperature of exhaust gas is about 130 ℃, the flue gas cannot meet the condensation requirement, and the heat exchange efficiency of a gas boiler is low.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a boiler flue gas recovery device which can improve the flue gas recovery efficiency and the heat exchange efficiency of a boiler.
The purpose of the utility model is realized by adopting the following technical scheme:
the boiler flue gas recovery device comprises a pipe box, a first communication box and a second communication box, wherein the pipe box is provided with a flue gas inlet, a flue gas outlet, a heat exchange medium inlet and a heat exchange medium outlet, a heat exchange tube is arranged in the tube box, a heat exchange medium flow passage is formed inside the heat exchange tube, a flue gas flow passage is formed outside the heat exchange tube, the flue gas flow channel is respectively connected with the flue gas inlet and the flue gas outlet, the heat exchange medium flow channel comprises a first heat exchange medium flow channel, a second heat exchange medium flow channel and a third heat exchange medium flow channel, the heat exchange medium inlet is connected with the first heat exchange medium flow passage, the first heat exchange medium flow passage is connected with the second heat exchange medium flow passage through a first communicating box, the third heat exchange medium flow passage is connected with the second heat exchange medium flow passage through a second communication box, and the heat exchange medium outlet is connected with the third heat exchange medium flow passage.
Further, the heat exchange tube is of a spiral fin structure.
Further, the heat exchange medium is cold air.
Further, the flue gas inlet and the flue gas outlet are respectively arranged on two sides of the tube box in the vertical direction.
Further, the flue gas inlet is arranged at the top of the pipe box, and the flue gas outlet is arranged at the bottom of the pipe box.
Further, the heat exchange medium inlet and the heat exchange medium outlet are respectively arranged on two sides of the tube box in the transverse direction.
Further, the heat exchange medium inlet is arranged on one side of the bottom of the tube box, and the heat exchange medium outlet is arranged on the other side of the top of the tube box.
Compared with the prior art, the beneficial effects of the utility model reside in that:
during heat exchange, a heat exchange medium enters the first heat exchange medium flow channel from the heat exchange medium inlet, smoke enters the pipe box from the smoke inlet and passes through the smoke flow channel, the heat exchange medium and high-temperature smoke perform first heat exchange at the moment, the heat exchange medium enters the second heat exchange medium flow channel through the first communicating box after heat exchange, the heat exchange medium and the high-temperature smoke perform second heat exchange at the moment, the heat exchange medium enters the third heat exchange medium flow channel through the second communicating box after heat exchange, the heat exchange medium and the high-temperature smoke perform third heat exchange at the moment, the heat exchange medium after the third heat exchange comes out from the heat exchange medium outlet, wherein the heat exchange medium outlet can be connected with heat exchange equipment, and the smoke after the heat exchange is discharged through the smoke outlet. This boiler flue gas recovery unit can increase the contact time of flue gas and heat transfer medium through setting up three heat transfer medium runner, is favorable to reducing boiler exhaust gas temperature, makes the high temperature flue gas can reach the requirement of condensation, improves the heat exchange efficiency of boiler and the recovery efficiency of flue gas.
Drawings
FIG. 1 is a schematic view of a boiler flue gas recovery device provided by the present invention;
fig. 2 is a sectional view of the boiler flue gas recovery device provided by the utility model.
In the figure: 1. a pipe box; 2. a heat exchange pipe; 3. a flue gas inlet; 4. a flue gas outlet; 5. a heat exchange medium inlet; 6. a heat exchange medium outlet; 7. a first communication box; 8. a second communication box.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "one," "another," and the like are used to distinguish similar elements, and these terms and other similar terms are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Corresponding reference numerals are used throughout the figures to indicate corresponding or corresponding elements (e.g., elements identified as "1 XX" and "2 XX" are structurally identical and functionally similar).
As shown in fig. 1 and fig. 2, for the boiler flue gas recovery device provided by the present invention, the boiler flue gas recovery device comprises a pipe box 1, a first communicating box 7 and a second communicating box 8, the pipe box 1 is provided with a flue gas inlet 3, a flue gas outlet 4, a heat exchange medium inlet 5 and a heat exchange medium outlet 6, a heat exchange pipe 2 is arranged in the pipe box 1, a heat exchange medium channel is formed inside the heat exchange pipe 2, a flue gas channel is formed outside the heat exchange pipe 2, the flue gas channel is respectively connected with the flue gas inlet 3 and the flue gas outlet 4, the heat exchange medium channel comprises a first heat exchange medium channel, a second heat exchange medium channel and a third heat exchange medium channel, the heat exchange medium inlet 5 is connected with the first heat exchange medium channel, the first heat exchange medium channel is connected with the second heat exchange medium channel through the first communicating box 7, and the third heat exchange medium channel is connected with the second heat exchange medium channel through the second communicating box, the heat exchange medium outlet 6 is connected with the third heat exchange medium flow passage.
The working principle of the boiler flue gas recovery device of the embodiment is as follows: the heat exchange medium enters the first heat exchange medium flow channel from the heat exchange medium inlet 5, the flue gas enters the pipe box 1 from the flue gas inlet 3 and passes through the flue gas flow channel, the heat exchange medium and the high-temperature flue gas perform first heat exchange at the moment, the heat exchange medium enters the second heat exchange medium flow channel through the first communication box 7 after heat exchange, the heat exchange medium and the high-temperature flue gas perform second heat exchange at the moment, the heat exchange medium enters the third heat exchange medium flow channel through the second communication box 8 after heat exchange, the heat exchange medium and the high-temperature flue gas perform third heat exchange at the moment, the heat exchange medium after the third heat exchange comes out from the heat exchange medium outlet 6, the heat exchange medium outlet 6 can be connected with heat exchange equipment, and the flue gas after the heat exchange. This boiler flue gas recovery unit can increase the contact time of flue gas and heat transfer medium through setting up three heat transfer medium runner, is favorable to reducing boiler exhaust gas temperature, makes the high temperature flue gas can reach the requirement of condensation, improves boiler heat exchange efficiency and flue gas recovery efficiency. Through tests, the exhaust gas temperature of the embodiment can reach about 60 ℃.
Preferably, the heat exchange medium of the present embodiment is cold air. The heat exchange medium of the device is air, and compared with the traditional water medium, the temperature difference between the flue gas and the heat exchange medium can be increased, and the flue gas recovery efficiency is high.
Preferably, the heat exchange tube 2 has a spiral fin structure. The heat exchange tube 2 is arranged into a spiral fin structure, so that the rigidity and the pressure bearing capacity of the fins are increased, heat transfer is facilitated, and the heat exchange area is 6-7 times that of a light tube with the same length. In addition, the roots of the fins are in small R smooth transition, so that heat transfer is facilitated, dust is not easy to accumulate at the roots of the fins, and the fins can be easily blown off even if a small amount of dust is accumulated, so that effective heat transfer is ensured.
Preferably, the flue gas inlet 3 and the flue gas outlet 4 are respectively arranged at two sides of the tube box 1 in the vertical direction. Specifically, the flue gas inlet 3 is arranged at the top of the tube box 1, and the flue gas outlet 4 is arranged at the bottom of the tube box 1. Therefore, the flue gas can preheat the third heat exchange medium flow channel and the second heat exchange medium flow channel, and the heat exchange effect of the heat exchange medium and the flue gas is favorably improved.
Preferably, the heat exchange medium inlet 5 and the heat exchange medium outlet 6 are respectively disposed at both sides of the tube box 1 in the transverse direction. Specifically, the heat exchange medium inlet 5 is arranged at one side of the bottom of the tube box 1, and the heat exchange medium outlet 6 is arranged at the other side of the top of the tube box 1.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (7)
1. The boiler flue gas recovery device is characterized by comprising a pipe box, a first communicating box and a second communicating box, the tube box is provided with a flue gas inlet, a flue gas outlet, a heat exchange medium inlet and a heat exchange medium outlet, a heat exchange tube is arranged in the tube box, a heat exchange medium flow channel is formed inside the heat exchange tube, a flue gas flow channel is formed outside the heat exchange tube and is respectively connected with the flue gas inlet and the flue gas outlet, the heat exchange medium flow passage comprises a first heat exchange medium flow passage, a second heat exchange medium flow passage and a third heat exchange medium flow passage, the heat exchange medium inlet is connected with the first heat exchange medium flow passage, the first heat exchange medium flow passage is connected with the second heat exchange medium flow passage through a first communicating box, the third heat exchange medium flow passage is connected with the second heat exchange medium flow passage through a second communication box, and the heat exchange medium outlet is connected with the third heat exchange medium flow passage.
2. The boiler flue gas recovery device of claim 1, wherein the heat exchange tubes are of a spiral fin structure.
3. The boiler flue gas recovery device of claim 1, wherein the heat exchange medium is cold air.
4. The boiler flue gas recovery device according to claim 1, wherein the flue gas inlet and the flue gas outlet are respectively disposed at both sides of the tube box in a vertical direction.
5. The boiler flue gas recovery device according to claim 4, wherein the flue gas inlet is disposed at the top of the tube box, and the flue gas outlet is disposed at the bottom of the tube box.
6. The boiler flue gas recovery device according to claim 1, wherein the heat exchange medium inlet and the heat exchange medium outlet are respectively disposed at both sides of the tube box in the transverse direction.
7. The boiler flue gas recovery device according to claim 6, wherein the heat exchange medium inlet is disposed at one side of the bottom of the tube box, and the heat exchange medium outlet is disposed at the other side of the top of the tube box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922419525.XU CN211926544U (en) | 2019-12-26 | 2019-12-26 | Boiler flue gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922419525.XU CN211926544U (en) | 2019-12-26 | 2019-12-26 | Boiler flue gas recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211926544U true CN211926544U (en) | 2020-11-13 |
Family
ID=73326761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922419525.XU Active CN211926544U (en) | 2019-12-26 | 2019-12-26 | Boiler flue gas recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211926544U (en) |
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2019
- 2019-12-26 CN CN201922419525.XU patent/CN211926544U/en active Active
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