CN216897836U - High-efficiency energy-saving gas heater - Google Patents
High-efficiency energy-saving gas heater Download PDFInfo
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- CN216897836U CN216897836U CN202220520580.7U CN202220520580U CN216897836U CN 216897836 U CN216897836 U CN 216897836U CN 202220520580 U CN202220520580 U CN 202220520580U CN 216897836 U CN216897836 U CN 216897836U
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- heat exchange
- flue gas
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a high-efficiency energy-saving gas heater, which comprises a shell and a partition plate arranged in the shell, wherein the partition plate divides the interior of the shell into a primary heat exchange cavity and a secondary heat exchange cavity; a heat exchange fin is arranged in the primary heat exchange cavity, the inlet of the heat exchange fin is connected with a coal gas input pipe, and the outlet of the heat exchange fin is connected with a coal gas output pipe; the heat exchange plates comprise a first heat exchange plate and a second heat exchange plate, the interiors of the first heat exchange plate and the second heat exchange plate are of cavity structures, the side portions of the first heat exchange plate and the second heat exchange plate are fixed with the inner wall of the shell, the upper end of the first heat exchange plate is fixed with the inner wall of the shell, the lower end of the second heat exchange plate is fixed with the partition plate, the first heat exchange plate and the second heat exchange plate are alternately arranged, and each adjacent first heat exchange plate and each adjacent second heat exchange plate are connected and communicated through a heat exchange tube; and a gas pipeline and a flue gas pipeline are arranged in the secondary heat exchange cavity, and heat exchange media are filled in the secondary heat exchange cavity outside the gas pipeline and the flue gas pipeline. The utility model improves the heat exchange effect of the flue gas and the coal gas.
Description
Technical Field
The utility model relates to the technical field of waste heat recovery, in particular to a high-efficiency energy-saving gas heater.
Background
The boiler flue gas contains a large amount of heat, most of the heat is discharged to the atmosphere without being utilized, a large amount of energy is wasted, and the flue gas heat is used for heating coal gas through the coal gas heater, so that the temperature of the coal gas can be increased, and the temperature of the flue gas can be recovered. The existing gas heater is generally divided into two cavities by an intermediate partition plate, a heat exchange tube is arranged in each cavity, one part of the heat exchange tube is arranged in a condensation cavity, the other part of the heat exchange tube is arranged in an evaporation cavity, the evaporation cavity and the condensation cavity are separated by the intermediate partition plate, and cold and hot fluids flow in different cavities to complete the heat exchange process. The gas heater with the structure has short flowing time because the flowing path of cold and hot fluid in the cavity is straight, can not realize sufficient heat exchange, and reduces the heat exchange efficiency.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a high-efficiency energy-saving gas heater.
The utility model is realized by the following technical scheme, and provides a high-efficiency energy-saving gas heater which comprises a shell and a partition plate arranged in the shell, wherein the partition plate divides the interior of the shell into a primary heat exchange cavity and a secondary heat exchange cavity; a flue gas inlet and a flue gas outlet are arranged on the primary heat exchange cavity, a heat exchange sheet is arranged in the primary heat exchange cavity, the inlet of the heat exchange sheet is connected with a coal gas input pipe, and the outlet of the heat exchange sheet is connected with a coal gas output pipe; the heat exchange fins comprise first heat exchange fins and second heat exchange fins, the interiors of the first heat exchange fins and the second heat exchange fins are of cavity structures, the side portions of the first heat exchange fins and the second heat exchange fins are fixed with the inner wall of the shell, the upper ends of the first heat exchange fins are fixed with the inner wall of the shell, the lower ends of the second heat exchange fins are fixed with the partition plate, the first heat exchange fins and the second heat exchange fins are alternately arranged, and each adjacent first heat exchange fin and each adjacent second heat exchange fin are connected and communicated through a heat exchange tube; and a gas pipeline and a flue gas pipeline are arranged in the secondary heat exchange cavity, and heat exchange media are filled in the secondary heat exchange cavity outside the gas pipeline and the flue gas pipeline.
The heat exchanger fin plays the effect of coal gas transfer passage on the one hand, and on the other hand plays the effect of flue gas partition wall, and the flow direction of flue gas can be changed in the cooperation of first heat exchanger fin and second heat exchanger fin, realizes flue gas labyrinth circulation, increases the flue gas route, improves the heat transfer effect. The flue gas forms the cross-flow heat transfer with the coal gas in the heat exchange tube, and the heat exchange is effectual, and the heat exchange tube both plays the effect of intercommunication heat transfer, still plays the effect of joint support heat exchanger fin simultaneously, realizes the stability of heat exchanger fin.
Preferably, the flue gas inlet and the coal gas output pipe are located at the same side, and the flue gas outlet and the coal gas input pipe are located at the same side. The flue gas conveying and the coal gas conveying are in reverse directions, and the heat exchange effect is good. The flue gas enters the primary heat exchange cavity through the flue gas inlet and is output through the flue gas outlet, and the coal gas enters the heat exchange fins through the coal gas input pipe, exchanges heat with the flue gas in the primary heat exchange cavity and is output through the coal gas output pipe.
Preferably, at least three heat exchange tubes are arranged between every two adjacent first heat exchange fins and every two adjacent second heat exchange fins, and gaps are formed between the adjacent heat exchange tubes. The flue gas passes through by the space between the heat exchange tube, and the structure setting of first heat exchanger fin and second heat exchanger fin makes one-level heat transfer intracavity form labyrinth flue.
Preferably, the flue gas outlet is connected with a flue gas pipeline, the gas output pipe is connected with a gas pipeline, and the flow direction of flue gas in the flue gas pipeline is opposite to the flow direction of gas in the gas pipeline. The heat exchange effect is enhanced.
Preferably, the number of the gas pipelines and the number of the flue gas pipelines are both a plurality, and the gas pipelines and the flue gas pipelines are arranged up and down.
Preferably, the gas pipeline and the flue gas pipeline are both in coil pipe type structures. The heat exchange effect is enhanced.
Preferably, the heat exchange medium is heat conduction oil.
Preferably, the partition plate is horizontally arranged, and the first-stage heat exchange cavity and the second-stage heat exchange cavity are arranged up and down.
The utility model has the beneficial effects that:
1. the utility model improves the heat exchange effect of the flue gas and the coal gas through secondary heat exchange; the primary heat exchange forms a labyrinth flue through each heat exchange sheet, so that the residence time of the flue gas in the primary heat exchange cavity is prolonged, the flue gas stroke is increased, and the heat exchange effect is good; the second stage uses heat-conducting oil as heat exchange medium, and the temperature is more uniform after the heat-conducting oil is heated, so that the further absorption of the heat of the flue gas is realized, and the heat exchange effect is improved.
2. The utility model recovers the heat of the flue gas, preheats the coal gas to more than 140 ℃ and sends the coal gas into the boiler for combustion, thereby achieving the purposes of improving the combustion temperature of the boiler and recovering the waste heat of the flue gas, and being high-efficiency and energy-saving preheating equipment.
Drawings
FIG. 1 is a schematic longitudinal sectional view of the present invention;
FIG. 2 is a schematic top view of the connection of the first heat exchanger fin, the second heat exchanger fin and the heat exchange tube according to the present invention;
shown in the figure:
1. the gas heat exchanger comprises a shell, 2, a partition plate, 3, a primary heat exchange cavity, 4, a secondary heat exchange cavity, 5, a flue gas inlet, 6, a flue gas outlet, 7, a gas input pipe, 8, a gas output pipe, 9, a first heat exchange sheet, 10, a second heat exchange sheet, 11, a heat exchange pipe, 12, a gap, 13, a gas pipeline, 14 and a flue gas pipeline.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 1, the present invention includes a casing 1 and a partition plate 2 disposed in the casing 1, wherein the partition plate 2 divides the inside of the casing 1 into a primary heat exchange chamber 3 and a secondary heat exchange chamber 4. The baffle 2 is horizontally arranged, and the primary heat exchange cavity 3 and the secondary heat exchange cavity 4 are arranged up and down.
A flue gas inlet 5 and a flue gas outlet 6 are arranged on the primary heat exchange cavity 3, heat exchange fins are arranged in the primary heat exchange cavity 3, inlets of the heat exchange fins are connected with a coal gas input pipe 7, and outlets of the heat exchange fins are connected with a coal gas output pipe 8. Flue gas enters the primary heat exchange cavity 3 through the flue gas inlet 5 and is output through the flue gas outlet 6, and coal gas enters the heat exchange fins through the coal gas input pipe 7, exchanges heat with the flue gas in the primary heat exchange cavity 3 and is output through the coal gas output pipe 8. The flue gas inlet 5 and the gas output pipe 8 are positioned at the same side, the flue gas outlet 6 and the gas input pipe 7 are positioned at the same side, the flue gas conveying and the gas conveying are in reverse directions, and the heat exchange effect is good.
The heat exchange fins comprise first heat exchange fins 9 and second heat exchange fins 10, the inner portions of the first heat exchange fins 9 and the second heat exchange fins 10 are of cavity structures, the side portions of the first heat exchange fins 9 and the second heat exchange fins 10 are fixed to the inner wall of the shell 1, the upper ends of the first heat exchange fins 9 are fixed to the inner wall of the shell 1, the lower ends of the second heat exchange fins 10 are fixed to the partition plate 2, the first heat exchange fins 9 and the second heat exchange fins 10 are alternately arranged, and the first heat exchange fins 9 and the second heat exchange fins 10 which are adjacent to each other are connected and communicated through heat exchange tubes 11. As shown in fig. 2, at least three heat exchange tubes 11 are arranged between every two adjacent first heat exchange fins 9 and second heat exchange fins 10, gaps 12 are arranged between the adjacent heat exchange tubes 11, and flue gas passes through the gaps 12 between the heat exchange tubes 11. The first heat exchange fins 9 and the second heat exchange fins 10 are arranged in a structure so that a labyrinth flue is formed in the primary heat exchange cavity 3.
The heat exchange fins play a role of a gas conveying channel on one hand, play a role of a smoke partition wall on the other hand, and the matching of the first heat exchange fins 9 and the second heat exchange fins 10 can change the flow direction of smoke, so that labyrinth circulation of the smoke is realized, the smoke path is increased, and the heat exchange effect is improved. The flue gas forms cross-flow heat exchange with the coal gas in the heat exchange tube 11, the heat exchange effect is good, the heat exchange tube 11 plays a role in communicating heat exchange, and meanwhile, the heat exchange tube also plays a role in connecting and supporting the heat exchange fins, and the stability of the heat exchange fins is realized.
A gas pipeline 13 and a flue gas pipeline 14 are arranged in the secondary heat exchange cavity 4, a heat exchange medium is filled in the secondary heat exchange cavity 4 outside the gas pipeline 13 and the flue gas pipeline 14, the heat exchange medium is heat conduction oil, and the gas pipeline 13 and the flue gas pipeline 14 are both of coil pipe type structures, so that the heat exchange effect is enhanced. The gas pipelines 13 and the flue gas pipelines 14 are respectively provided with a plurality of gas pipelines 13 and flue gas pipelines 14 which are arranged up and down. The flue gas outlet 6 is connected with a flue gas pipeline 14, the gas output pipe 8 is connected with a gas pipeline 13, the flow direction of flue gas in the flue gas pipeline 14 is opposite to the flow direction of gas in the gas pipeline 13, and the heat exchange effect is enhanced.
The utility model improves the heat exchange effect of the flue gas and the coal gas through secondary heat exchange; the primary heat exchange forms a labyrinth flue through each heat exchange sheet, so that the residence time of the flue gas in the primary heat exchange cavity 3 is prolonged, the flue gas stroke is increased, and the heat exchange effect is good; the second stage uses heat-conducting oil as heat exchange medium, and the temperature is more uniform after the heat-conducting oil is heated, so that the further absorption of the heat of the flue gas is realized, and the heat exchange effect is improved.
The utility model recovers the heat of the flue gas, preheats the coal gas to more than 140 ℃ and sends the coal gas into the boiler for combustion, thereby achieving the purposes of improving the combustion temperature of the boiler and recovering the waste heat of the flue gas, and being high-efficiency and energy-saving preheating equipment. The equipment is widely applied to industries such as steel, electric power, petroleum, chemical engineering and the like, and has good application effect in equipment such as boilers, heating furnaces, incinerators, boilers and the like and supporting equipment.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (9)
1. An energy-efficient coal gas heater which is characterized in that: the heat exchanger comprises a shell and a partition plate arranged in the shell, wherein the partition plate divides the interior of the shell into a primary heat exchange cavity and a secondary heat exchange cavity; a flue gas inlet and a flue gas outlet are arranged on the primary heat exchange cavity, a heat exchange sheet is arranged in the primary heat exchange cavity, the inlet of the heat exchange sheet is connected with a coal gas input pipe, and the outlet of the heat exchange sheet is connected with a coal gas output pipe; the heat exchange fins comprise first heat exchange fins and second heat exchange fins, the interiors of the first heat exchange fins and the second heat exchange fins are of cavity structures, the side portions of the first heat exchange fins and the second heat exchange fins are fixed with the inner wall of the shell, the upper ends of the first heat exchange fins are fixed with the inner wall of the shell, the lower ends of the second heat exchange fins are fixed with the partition plate, the first heat exchange fins and the second heat exchange fins are alternately arranged, and each adjacent first heat exchange fin and each adjacent second heat exchange fin are connected and communicated through a heat exchange tube; and a gas pipeline and a flue gas pipeline are arranged in the secondary heat exchange cavity, and heat exchange media are filled in the secondary heat exchange cavity outside the gas pipeline and the flue gas pipeline.
2. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the flue gas inlet and the coal gas output pipe are positioned at the same side, and the flue gas outlet and the coal gas input pipe are positioned at the same side.
3. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: at least three heat exchange tubes are arranged between every two adjacent first heat exchange fins and every two adjacent second heat exchange fins, and gaps are formed between the adjacent heat exchange tubes.
4. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the flue gas outlet is connected with a flue gas pipeline, and the gas output pipe is connected with a gas pipeline.
5. The high-efficiency energy-saving gas heater according to claim 4, characterized in that: the flow direction of the flue gas in the flue gas pipeline is opposite to the flow direction of the coal gas in the coal gas pipeline.
6. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the gas pipeline and the flue gas pipeline are arranged up and down.
7. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the gas pipeline and the flue gas pipeline are both of coil pipe type structures.
8. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the heat exchange medium is heat conduction oil.
9. The high-efficiency energy-saving gas heater according to claim 1, characterized in that: the baffle is horizontally arranged, and the first-stage heat exchange cavity and the second-stage heat exchange cavity are arranged up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220520580.7U CN216897836U (en) | 2022-03-11 | 2022-03-11 | High-efficiency energy-saving gas heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220520580.7U CN216897836U (en) | 2022-03-11 | 2022-03-11 | High-efficiency energy-saving gas heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216897836U true CN216897836U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220520580.7U Active CN216897836U (en) | 2022-03-11 | 2022-03-11 | High-efficiency energy-saving gas heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216897836U (en) |
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2022
- 2022-03-11 CN CN202220520580.7U patent/CN216897836U/en active Active
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