CN219414856U - Plate-type air preheater for gas boiler - Google Patents
Plate-type air preheater for gas boiler Download PDFInfo
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- CN219414856U CN219414856U CN202320724479.8U CN202320724479U CN219414856U CN 219414856 U CN219414856 U CN 219414856U CN 202320724479 U CN202320724479 U CN 202320724479U CN 219414856 U CN219414856 U CN 219414856U
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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 aims to disclose a plate-type air preheater for a gas boiler, which comprises a plate-type heat exchange core body and an air preheater shell, wherein the plate-type heat exchange core body is arranged in the air preheater shell, the upper end face and the lower end face of the air preheater shell are respectively connected with an air inlet joint and an air outlet joint, and the left end face and the right end face of the air preheater shell are respectively connected with a flue gas inlet joint and a flue gas outlet joint; compared with the prior art, the plate type heat exchange core is formed by stacking a plurality of intermittent straight corrugated plates, each intermittent straight corrugated plate comprises a middle corrugated region and a peripheral plane region, the intermittent structure of each intermittent corrugated plate enhances air side turbulence, the corrugated structure of each intermittent corrugated plate enhances flue gas side turbulence, and the two-side turbulence greatly enhances heat transfer efficiency; the full-welding type sealing mode is adopted, so that zero air leakage can be realized; the heat exchanger is applied to gas-liquid heat exchange and liquid-liquid heat exchange, and achieves the aim of the utility model.
Description
Technical Field
The utility model relates to a plate-type air preheater, in particular to a plate-type air preheater for a gas boiler, which is used for gas boiler smoke waste heat recovery energy-saving equipment.
Background
Compared with the coal-fired boiler, the combustion of the gas-fired boiler is more complete, the content of corrosive and polluting gases in the flue gas is low, and the dust content of the flue gas is almost zero.
As the most important auxiliary equipment of the boiler, the air preheater is a heat exchange equipment for heating air required for combustion by using waste heat of exhaust gas of the boiler. Aiming at the smoke discharging characteristic of the gas boiler, a novel air preheater suitable for dust-free smoke needs to be designed.
At present, the air preheater of the gas boiler is mainly in a fin tube form, the tube-fin air preheater can bear high pressure and temperature, the heat exchange area per unit volume is high, the problems are that the heat exchange fins perform secondary heat exchange, the heat exchange efficiency is low, the fin distance is small, dust accumulation blockage is easy to occur, and the heat exchange fins are huge and difficult to flexibly arrange.
The traditional plate heat exchanger has compact structure, high heat transfer efficiency and small occupied area, but is more suitable for liquid-liquid heat exchange because the traditional plate heat exchanger has small runner plate spacing, large resistance loss and extremely easy blockage, and the traditional plate heat exchanger is sealed by adopting a rubber gasket and cannot bear larger pressure and higher temperature.
Therefore, there is a particular need for a plate air preheater for a gas boiler to address the above-described problems.
Disclosure of Invention
The utility model aims to provide a plate-type air preheater for a gas boiler, which overcomes the defects of low heat exchange efficiency, huge volume and the like of the conventional tube-fin air preheater, combines the advantages of compact structure, high heat transfer efficiency and the like of the plate-type heat exchanger and greatly improves the heat transfer efficiency.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
the plate-type air preheater for the gas boiler comprises a plate-type heat exchange core body and an air preheater shell, wherein the plate-type heat exchange core body is arranged inside the air preheater shell, the upper end face and the lower end face of the air preheater shell are respectively connected with an air inlet joint and an air outlet joint, and the left end face and the right end face of the air preheater shell are respectively connected with a flue gas inlet joint and a flue gas outlet joint; the plate type heat exchange core is formed by stacking a plurality of intermittent straight corrugated plates, each intermittent straight corrugated plate comprises a middle corrugated region and peripheral plane regions, the middle corrugated region is intermittent straight corrugations, the number of the intermittent straight corrugations is even, the plane regions on the left side and the right side are divided into an A-type intermittent corrugated plate and a B-type intermittent corrugated plate due to different lengths, the A-type intermittent corrugated plate and the B-type intermittent corrugated plate are overlapped to form an air flow channel, and the intermittent straight corrugated plates of the two air flow channels are overlapped to form a flue gas flow channel; the A-type intermittent corrugated plate and the B-type intermittent corrugated plate are welded with the edges of the plane areas on the left side and the right side after being stacked to form an air flow passage seal, and the intermittent straight corrugated plates of the two air flow passages are welded with the edges of the plane areas on the upper side and the lower side after being stacked to form a flue gas flow passage seal.
In one embodiment of the present utility model, the number of discontinuities of the discontinuous straight corrugation is 3-8.
In one embodiment of the present utility model, the number of the intermittent straight corrugations is an even number.
In one embodiment of the utility model, the difference in length between the type a and type B intermittent corrugated plates is equal to half the length of the corrugations of the intermediate corrugated section.
Compared with the prior art, the plate type air preheater for the gas boiler is formed by stacking a plurality of intermittent straight corrugated plates, wherein each intermittent straight corrugated plate comprises a middle corrugated plate area and a peripheral plane area, the lengths of the plane areas on the left side and the right side are different and are divided into an A-type intermittent corrugated plate and a B-type intermittent corrugated plate, the A-type intermittent corrugated plate and the B-type intermittent corrugated plate are overlapped to form an air flow passage, the two intermittent corrugated plates are overlapped to form a flue gas flow passage, the air side turbulence is enhanced by the intermittent structure of each intermittent corrugated plate, the flue gas side turbulence is enhanced by the corrugated structure of each intermittent corrugated plate, and the heat transfer efficiency is greatly enhanced by double-side turbulence; the full-welding type sealing mode is adopted, so that zero air leakage can be realized; the heat exchanger is applied to gas-liquid heat exchange and liquid-liquid heat exchange, and achieves the aim of the utility model.
The features of the present utility model will be apparent from the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the structure of the plate air preheater of the present utility model;
FIG. 2 is a schematic view of the plate heat exchange core of the present utility model;
FIG. 3 is a schematic view of the structure of the A-plate of the present utility model;
FIG. 4 is a schematic view of the structure of the B-shaped plate of the present utility model.
Reference numerals illustrate: 1-plate heat exchange core, 2-air preheater shell, 3-flue gas inlet joint, 4-flue gas outlet joint, 5-air inlet joint, 6-air outlet joint, 7-air flow passage sealing welding edge, 8-flue gas flow passage sealing welding edge, 11-A type intermittent corrugated plate, 12-wide sealing plane, 13-narrow sealing plane, 14-straight corrugation, 15-intermittent and 21-B type intermittent corrugated plate.
Detailed Description
The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.
As shown in fig. 1, the plate-type air preheater for the gas boiler comprises a plate-type heat exchange core body 1, an air preheater shell 2, a smoke inlet joint 3, a smoke outlet joint 3, an air inlet joint 5 and an air outlet joint 6; the plate heat exchange core body 1 is formed by stacking a plurality of intermittent straight corrugated plates, and the intermittent straight corrugated plates are divided into an A-type intermittent corrugated plate 11 and a B-type intermittent corrugated plate 21 according to different lengths of sealing planes at the left side and the right side; a plane area and a corrugated area are arranged on the intermittent straight corrugated plate, the left plane area and the right plane area are divided into a wide sealing plane 12 and a narrow sealing plane 13, and the corrugated area comprises straight corrugations 14 and corrugated discontinuities 15; an A-type intermittent corrugated plate 11 and a B-type intermittent corrugated plate 12 are arranged in a superposed manner to form an air side flow passage, and the air flow passage sealing welding edges 7 on the left side and the right side are welded to form an air side seal; the two A-type intermittent corrugated plates 11 and the B-type intermittent corrugated plates 12 are arranged in a butt-stack manner to form a flue gas flow passage, and the flue gas flow passage curve is parallel to the corrugated curve because the length difference between the wide sealing plane 12 and the narrow sealing plane 13 is half of the corrugated length of the intermittent straight corrugated plates, so that the flue gas flow passage sealing welding edges 8 on the upper side and the lower side are welded to form an empty flue gas side seal.
Examples:
referring to fig. 1, high temperature flue gas flows in from a flue gas inlet joint 3, flows out from a flue gas outlet joint 4 after passing through a plate heat exchange core 1, the temperature of flue gas is reduced, low temperature air flows in from an air inlet joint 5, flows out from an air outlet joint 6 after passing through the plate heat exchange core 1, the temperature of air is increased, an air preheater shell 2 is arranged outside the plate heat exchange core 1, the fixation of the plate heat exchange core 1 is realized, the air preheater shell 2 is sealed with the flue gas inlet joint 3, the flue gas outlet joint 4, the air inlet joint 5 and the air outlet joint 6 through welding so as to realize zero leakage of heat exchange medium to the environment, and the air preheater shell can also be connected through bolts so as to realize the detachability of the joints, thereby being beneficial to transportation, installation and maintenance of the air preheater.
Referring to fig. 2, both sides of the air passage are welded and sealed by the air passage sealing and welding edges 7, and both sides of the smoke passage are welded and sealed by the smoke passage sealing and welding edges 8.
Referring to fig. 3, the corrugated structure 14 on the intermittent straight corrugated plate enhances the flue gas side turbulence, the intermittent structure 15 enhances the air side turbulence, and the double-sided turbulence greatly enhances the heat transfer efficiency.
Referring to fig. 4, the wide sealing plane 12 of the type B intermittent straight corrugated plate 21 is on the right side, the narrow sealing plane 13 is on the left side, and the type a intermittent straight corrugated plate 11 is just opposite, which is the only difference between the type a intermittent corrugated plate 11 and the type B intermittent corrugated plate 21.
Table 1 shows the comparison value of heat exchange performance of the plate type air preheater and the tubular air preheater under the conditions of the same heat exchange medium inlet parameter and the same external dimension parameter. It can be seen from table 1 that the heat exchange coefficient of the plate air preheater is higher than that of the tube air preheater under the same inlet parameters.
Table 1 comparison of heat exchange properties
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the utility model, and that various changes and modifications may be effected therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.
Claims (4)
1. The plate-type air preheater for the gas boiler is characterized by comprising a plate-type heat exchange core body and an air preheater shell, wherein the plate-type heat exchange core body is arranged in the air preheater shell, the upper end face and the lower end face of the air preheater shell are respectively connected with an air inlet joint and an air outlet joint, and the left end face and the right end face of the air preheater shell are respectively connected with a flue gas inlet joint and a flue gas outlet joint; the plate type heat exchange core is formed by stacking a plurality of intermittent straight corrugated plates, each intermittent straight corrugated plate comprises a middle corrugated region and peripheral plane regions, the middle corrugated region is intermittent straight corrugations, the number of the intermittent straight corrugations is even, the plane regions on the left side and the right side are divided into an A-type intermittent corrugated plate and a B-type intermittent corrugated plate due to different lengths, the A-type intermittent corrugated plate and the B-type intermittent corrugated plate are overlapped to form an air flow channel, and the intermittent straight corrugated plates of the two air flow channels are overlapped to form a flue gas flow channel; the A-type intermittent corrugated plate and the B-type intermittent corrugated plate are welded with the edges of the plane areas on the left side and the right side after being stacked to form an air flow passage seal, and the intermittent straight corrugated plates of the two air flow passages are welded with the edges of the plane areas on the upper side and the lower side after being stacked to form a flue gas flow passage seal.
2. The plate type air preheater as set forth in claim 1, wherein the number of discontinuities of said intermittent straight corrugation is 3-8.
3. The plate type air preheater as set forth in claim 1, wherein the number of said intermittent straight corrugations is an even number.
4. A plate air preheater for a gas boiler as set forth in claim 1, wherein the difference in length between said a-type intermittent corrugated plate and said B-type intermittent corrugated plate is equal to half the length of the corrugations of the intermediate corrugated zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724479.8U CN219414856U (en) | 2023-04-04 | 2023-04-04 | Plate-type air preheater for gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724479.8U CN219414856U (en) | 2023-04-04 | 2023-04-04 | Plate-type air preheater for gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219414856U true CN219414856U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320724479.8U Active CN219414856U (en) | 2023-04-04 | 2023-04-04 | Plate-type air preheater for gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219414856U (en) |
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2023
- 2023-04-04 CN CN202320724479.8U patent/CN219414856U/en active Active
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