CN210485790U - Novel plate-type air preheater - Google Patents
Novel plate-type air preheater Download PDFInfo
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- CN210485790U CN210485790U CN201921512356.8U CN201921512356U CN210485790U CN 210485790 U CN210485790 U CN 210485790U CN 201921512356 U CN201921512356 U CN 201921512356U CN 210485790 U CN210485790 U CN 210485790U
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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
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Abstract
A novel plate type air preheater is characterized in that a plate type heat exchange core body is formed by overlapping a certain number of heat exchange plates; the heat exchange plates are pressed by a flat plate, a square groove and a small circular groove between the square grooves are formed on the plate, a pair of edge flanges are arranged, one heat exchange plate is rotated by 90 degrees and is overlapped with the other heat exchange plate at a certain interval, the square groove is opposite to the square groove, the small circular grooves on the two heat exchange plates are spaced and supported by the plate to form a channel height, the edge flanges are welded to form a fluid channel, and the flowing mode of the two fluids is cross flow. The utility model is suitable for a working medium is clean, and the amount of wind is great, and the pressure drop requires lowly, the field that the heat transfer required height. Because the heat exchange flow channel is similar to a flat plate channel, and the pressure drop on two sides is not increased when the air turbulence is increased by the groove formed by punching on the plate sheet, the heat exchange coefficient is high, and the pressure is reduced; in addition, the heat exchanger is pressure-resistant, temperature-resistant, simple to process, free of edge strips during channel welding, convenient to laser weld and low in manufacturing cost.
Description
Technical Field
The utility model belongs to gas boiler waste heat recovery economizer heat exchange field, in particular to novel plate-type air heater.
Background
At present, the recovery of the waste heat of flue gas in a power plant is mainly realized by an air preheater, and the existing air preheaters are mainly rotary type, tubular type and finned tube type. In the context of gas-fired boilers, tubular air preheaters now represent a considerable proportion. The pipe type and finned tube air preheater is low in heat exchange efficiency, large in size, easy to accumulate dust and difficult to process after accumulating dust, and the flue gas inlet heat exchange pipe is large in abrasion, so that the working efficiency and the service life of the air preheater are influenced.
The plate heat exchanger has compact structure and high heat transfer efficiency, but has complex processing technology, high manufacturing cost and low pressure and temperature resistance. Traditional plate heat exchanger is because the phenomenon that rubber packing ring's reason can appear ageing in the use, is not suitable for the heat transfer process that is used for flue gas and air. Therefore, it is urgent to develop a new plate type air preheater suitable for a utility boiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that the traditional plate-type air preheater has narrow application range, complex processing technology, high manufacturing cost, low pressure and temperature resistance, aging phenomenon in the using process and unsuitability for the heat exchange process of flue gas and air, and the traditional rotary and tubular air preheater has the problems of easy failure, large occupied area, low heat exchange coefficient, dust deposition problem, short service life and the like; the novel plate-type air preheater is provided, a fluid channel of the heat exchanger is formed by the support formed by the circular groove, and the edges of the opposite sides of the plate sheets are folded to facilitate laser welding; the plate is of a square structure, so that the modular assembly is easy, in addition, because the two sides are similar to the flat plate channel, and the pressure drop of the two sides is not increased while the air turbulence is increased by the groove formed by punching the plate, the heat exchange coefficient is high, and the pressure is reduced; in addition, this novel plate air heater has withstand voltage, and the temperature resistant is processed simply and the laser welding of being convenient for, low in manufacturing cost's characteristics.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel plate type air preheater is characterized in that: the heat exchanger comprises a plate type heat exchange core body; the plate type heat exchange core body is formed by stacking and welding a plurality of pressed single plates, the welding positions are a smoke side folding edge and an air side folding edge, the stacking mode is that one heat exchange single plate rotates by 90 degrees and is stacked with the other heat exchange plate at a certain interval, a square groove is opposite to a square groove, a circular groove on one single plate is opposite to a plane area on the other plate, and small circular grooves on the two heat exchange plates support the plates at intervals to form a channel height, so the sizes of a smoke channel and an air channel can be selected at will by adjusting the height of the circular groove; the upper side and the lower side of each single sheet are provided with air side folding edges or smoke side folding edges, the left side and the right side of each single sheet are not provided with folding edges, and each single sheet is punched by a die to form a square groove and a circular groove; the pressing heights of the circular groove, the air side folding edge and the smoke side folding edge are the same, the sizes of the smoke channel and the air channel of the fluid channel at two sides can be changed by changing the pressing heights of the circular groove, the air side folding edge and the smoke side folding edge, and the air side folding edge plays a role in sealing the air channel through a welding process; the flue gas side folded edge plays a role in sealing the flue gas channel through a welding process.
Further, the single plate and the single plate are stacked through rotating by 90 degrees to form a smoke channel or an air channel.
Furthermore, the depth and the side length of the square groove are 10-100 mm.
Furthermore, the depth and the side length of the circular groove (8) are 0.1-20 mm.
Further, the air side flap and the flue gas side flap include sealing edges.
The utility model has the advantages that: (1) the defects that the traditional plate type air preheater is narrow in application range, low in heat exchange efficiency, incapable of bearing high pressure and high temperature and the like are overcome;
(2) the groove type plate structure has a certain turbulence effect on fluid media, is easy to realize a turbulent flow state and has the advantages of high heat exchange efficiency and the like;
(3) the utility model discloses plate air heater makes processing simply, and board type shaping rate is high, and the material requires lowly, and the processing cost is low, easily modularization, simple to operate.
(4) The plate type air preheater of the utility model adopts laser welding through the self-folding edge of the plate, no regula and gasket need to be added, and the welding amount is small;
(5) the plate-type air preheater of the utility model can be used in the field of gas-gas heat exchange of power plants, and is also suitable for gas-liquid heat exchange and liquid-liquid heat exchange.
(6) The utility model discloses board-like air preheater groove structure is square groove, and the slab is square slab, can support the access structure after rotatory 90 piles up, is convenient for form the runner, easily modularization equipment.
Drawings
Fig. 1 is an overall schematic view of a core structure in an embodiment of the present invention;
fig. 2 is an enlarged schematic view of the core structure in the embodiment of the present invention;
FIG. 3 is a schematic diagram of the channel structure in the embodiment of the present invention;
FIG. 4 is a top view of a single plate in an embodiment of the invention;
fig. 5 is a front view of a single plate in an embodiment of the invention.
Reference numbers in the figures: 1 plate heat exchange core, 2 single slab, 3 flue gas passageways, 4 air passage, 5 air side hem, 6 flue gas side hem, 7 square groove, 8 circular groove, 9 plane region.
Detailed Description
The invention is further described with reference to the following figures and examples.
The utility model is used for gas-gas and gas-water heat exchange and comprises a plate type heat exchange core body; the plate type heat exchange core body is formed by superposing a certain number of heat exchange plates. The heat exchange plates are pressed by a flat plate, a square groove and a small circular groove between the square grooves are formed on the plate, a pair of edge flanges are arranged, one heat exchange plate is rotated by 90 degrees and is overlapped with the other heat exchange plate at a certain interval, the square groove is opposite to the square groove, the small circular grooves on the two heat exchange plates are spaced and supported by the plate to form a channel height, the edge flanges are welded to form a fluid channel, and the flowing mode of the two fluids is cross flow. The utility model provides a novel plate air heater is applicable to the working medium cleanness, and the amount of wind is great, and the pressure drop requires lowly, the field that the heat transfer requires height. Because the heat exchange flow channel is similar to a flat plate channel, and the pressure drop on two sides is not increased when the air turbulence is increased by the groove formed by punching on the plate sheet, the heat exchange coefficient is high, and the pressure is reduced; in addition, the heat exchanger is pressure-resistant, temperature-resistant, simple to process, free of edge strips during channel welding, convenient to laser weld and low in manufacturing cost.
Example 1: referring to fig. 1 and 2, a novel plate air preheater includes: the plate type heat exchange core body 1 is formed by stacking and welding a plurality of pressed plates 2 in a rotating mode by 90 degrees, and a flue gas channel 3 is formed by welding at a flue gas side folded edge 6; the air channel 4 is formed by welding at the air side folding edge 5.
Referring to fig. 3, two pressed plates 2 are stacked and welded in such a manner that the circular-like grooves 8 and the flat areas 9 are overlapped.
Referring to fig. 4 and 5, the single plate is provided with a square groove 7 and a circular groove 8 which are formed by pressing, an air side folding edge 5 and a smoke side folding edge 6.
Claims (5)
1. A novel plate air preheater is characterized in that: the plate type heat exchange core comprises a plate type heat exchange core body (1); the plate type heat exchange core body (1) is formed by stacking and welding a plurality of pressed single plate sheets (2), the welding positions are a smoke side folding edge (6) and an air side folding edge (5), the stacking mode is that one heat exchange single plate sheet (2) rotates 90 degrees and is stacked with another heat exchange plate sheet at a certain interval, a square groove (7) is opposite to a square groove, a circular groove (8) on one single plate sheet (2) is opposite to a plane area (9) on the other plate sheet, and small circular grooves on the two heat exchange plates support the plate sheets at intervals to form a channel height, so that the sizes of the smoke channel (3) and the air channel (4) can be selected at will by adjusting the height of the circular groove (8); the upper side and the lower side of each single sheet (2) are provided with air side folding edges (5) or smoke side folding edges (6), the left side and the right side of each single sheet are not provided with folding edges, and the single sheet (2) is punched by a die to form a square groove (7) and a circular groove (8); the pressing height of the circular groove (8) is the same as that of the air side folding edge (5) and the smoke side folding edge (6), the sizes of the smoke channel (3) and the air channel (4) of the fluid channel at two sides can be changed by changing the pressing height of the circular groove (8) and the air side folding edge (5) and the smoke side folding edge (6), and the air side folding edge (5) plays a role in sealing the air channel (4) through a welding process; the smoke side folding edges (6) play a role in sealing the smoke channel (3) through a welding process.
2. A novel plate air preheater according to claim 1, wherein: the single plate (2) and the single plate are stacked through rotating by 90 degrees to form a smoke channel (3) or an air channel (4).
3. A novel plate air preheater according to claim 1, wherein: the depth and the side length of the square groove (7) are 10-100 mm.
4. A novel plate air preheater according to claim 1, wherein: the depth and the side length of the circular groove (8) are 0.1-20 mm.
5. A novel plate air preheater according to claim 1, wherein: the air side folding edge (5) and the smoke side folding edge (6) comprise sealing edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921512356.8U CN210485790U (en) | 2019-09-11 | 2019-09-11 | Novel plate-type air preheater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921512356.8U CN210485790U (en) | 2019-09-11 | 2019-09-11 | Novel plate-type air preheater |
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| Publication Number | Publication Date |
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| CN210485790U true CN210485790U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921512356.8U Active CN210485790U (en) | 2019-09-11 | 2019-09-11 | Novel plate-type air preheater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469868A (en) * | 2019-09-11 | 2019-11-19 | 南京同诚节能环保装备研究院有限公司 | A kind of Novel plate type air preheater |
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2019
- 2019-09-11 CN CN201921512356.8U patent/CN210485790U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469868A (en) * | 2019-09-11 | 2019-11-19 | 南京同诚节能环保装备研究院有限公司 | A kind of Novel plate type air preheater |
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