CN210952452U - Low-resistance heat exchange element - Google Patents
Low-resistance heat exchange element Download PDFInfo
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- CN210952452U CN210952452U CN201921172589.8U CN201921172589U CN210952452U CN 210952452 U CN210952452 U CN 210952452U CN 201921172589 U CN201921172589 U CN 201921172589U CN 210952452 U CN210952452 U CN 210952452U
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Abstract
The utility model relates to a low resistance heat exchange element, belonging to the field of heating furnace flue gas heat exchangers; the cold channel is formed by each plate pair, a plurality of rows of convex bulges and concave bulges are distributed on the upper surface of each plate sheet along the same axial direction and are obtained by pressing the plate sheets upwards and downwards, the convex bulges and the concave bulges are distributed in a staggered manner, and the concave bulges and the convex bulges of the upper plate sheet in the plate pairs correspond to the convex bulges and the concave bulges of the lower plate sheet respectively; the convex bulge and the concave bulge both comprise large bulges and small bulges, the large bulges and the small bulges are round tables and are arranged in a staggered mode, the height of the large bulges is 7-10mm, the height of the small bulges is 2.5-3mm, the heat exchange effect is good, the heat exchange efficiency is high, scaling is not prone to occurring, the strength is improved, the resistance is reduced, the cost is saved, and the production process is simple.
Description
Technical Field
The utility model relates to a low resistance heat transfer component belongs to heating furnace gas heater field.
Background
The heat exchanger is used as a heat exchange device, and can be widely applied to industries such as petroleum, chemical engineering, metallurgy, nuclear power, medicine and the like because the heat exchanger can realize heat exchange among media with different temperatures. With the increase of social productivity, people's demand for energy is rapidly increased, and how to improve the energy utilization efficiency is a common problem facing human beings. Wherein, the key step of improving the energy utilization efficiency is to improve the heat exchange efficiency of the heat exchanger.
In the field of heating furnace flue gas heat exchangers, the existing plate heat exchanger has the adverse phenomena of reduced heat exchange efficiency, increased heat transfer resistance, blocked pipelines and the like. Chinese patent 201810464796.4 discloses an absorption type all-welded plate-shell heat exchanger, which has the following beneficial effects:
(1) strengthen the heat transfer effect, improve heat exchange efficiency, reduce area:
the heat exchanger has compact structure, small volume, safety, convenience and convenient maintenance, effectively reduces the invalid heat exchange area which can not generate countercurrent heat exchange, and is high-efficiency heat transfer equipment. The dimpled structure can effectively enhance the fluid disturbance of the shell pass and the plate pass, greatly enhance the heat transfer effect, further reduce the volume and the occupied area of the equipment, reduce the installation quantity of the equipment, reduce the cost and facilitate the operation and the maintenance of the equipment.
(2) The structure is nimble changeable, can design according to the operating mode:
the heat exchange area is flexible, and the size and the number of the plates can be flexibly adjusted by changing the size and the number of the plates according to different process requirements. The heat exchanger can be designed according to comprehensive adjustment details of temperature, pressure drop, heat exchange efficiency and the like of a heat exchange medium so as to meet the use requirement.
(3) Scaling is not easy to occur:
the dimpling between the plates and the contact formed by the contact of the dimpling can ensure that the stress of the plates is uniformly distributed, and the deformation caused by temperature difference and vibration is effectively relieved. The rugged surface causes fluid to be turbulent flow under a lower Reynolds number, so that a large wall shear force is generated, the self-cleaning function of the heat exchanger is realized, scaling is not easy to occur, the maintenance cost is low, and the service life is long.
However, the problem of the increase in heat transfer resistance is not solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a low resistance heat transfer component on the basis of the heat transfer is effectual, heat exchange efficiency is high, difficult scale deposit, reduces the resistance, practices thrift cost, production simple process.
The low-resistance heat exchange element comprises a plurality of plate pairs which are stacked layer by layer, each plate pair comprises an upper plate and a lower plate which are arranged in opposite directions, each plate pair forms a heat channel, two adjacent plate pairs form a cold channel, the upper surfaces of the plates are distributed with a plurality of rows of convex bulges and concave bulges along the same axis direction, the convex bulges and the concave bulges are respectively obtained by pressing the plates upwards and downwards, the convex bulges and the concave bulges are distributed in a staggered way, and the concave bulges and the convex bulges of the upper plate in the plate pairs respectively correspond to the convex bulges and the concave bulges of the lower plate; the convex bulges and the concave bulges both comprise large bulges and small bulges which are round tables and are arranged in a staggered mode, the height of the large bulges is 7-10mm, and the height of the small bulges is 2.5-3 mm.
The small bulge plays a role in strengthening the strength of the plate and prevents the plate from increasing the flow resistance, so that the height of the small bulge is shorter, and the height of the small bulge is 2.5-3 mm. The concave-convex bulges are distributed in a staggered way to form different flow channel intervals on two sides. The large bulges play a role in supporting the cold channel and the hot channel, a wide channel is formed for supporting, the height of the large bulges is 7-10mm, and the wide channel is favorable for reducing gas resistance. The large bulge and the small bulge are round tables, so that the die is easy to demould, and the production process is simple. The side walls of the large bulge and the small bulge of the cone are smooth circular arcs, so that the gas flow resistance can be effectively reduced. Due to the design of the bulge structure and the wide channel, the resistance is greatly reduced, the power of the fan is reduced, and the cost of energy consumption is saved for customers. The upper surface of the big drum bag of the cone is a plane, so that the contact is convenient to weld and the production process is simple. The bulge structure can effectively enhance fluid disturbance, greatly enhance heat transfer effect, further reduce the volume and the occupied area of equipment, reduce the installation quantity of the equipment, reduce cost and facilitate the operation and maintenance of the equipment. The contact formed by the large bulge, the small bulge and the large bulge between the plates can ensure that the stress of the plates is uniformly distributed, and the deformation caused by temperature difference and vibration can be effectively relieved. The fluid is turbulent flow caused by the uneven surface, so that the self-cleaning function of the heat exchanger is realized, the scaling is not easy to occur, the maintenance cost is low, and the service life is long.
Preferably, the large bulge interval is 300-500mm, and the diameter of the bottom surface is 25-40 mm; the distance between the small bulges is 80-90mm, and the diameter of the bottom surface is 20-25 mm. The large bulges have larger diameters, are convenient to support, have larger intervals, are convenient for gas circulation and reduce resistance. The large bulge interval is 300-500mm, so that the plate can be effectively supported, and the smoke resistance can be reduced. The small bulge interval is convenient for strengthen the strength of the plate, the diameter is small, so that the gas circulation is convenient, and the resistance is reduced.
Preferably, the diameter of the top surface of the big drum is 15-30mm, and the diameter of the top surface of the small drum is 15-20 mm. The diameter of the top surface is small, so that the gas circulation is facilitated, and the resistance is reduced.
Preferably, a distance column is arranged between the big bulges in the cold channel and the hot channel. The distance posts are used for supporting the cold channel and the hot channel, the width of the channels is further increased, and the resistance is reduced. The height of the large bulge is 7-10mm, the height is high, the length of the distance column can be reduced, and the cost is saved.
Preferably, the height of the big bulge at the cold channel side is smaller than that of the big bulge at the hot channel side, so that a narrower cold channel and a wider hot channel are formed, and the heat exchange effect is further enhanced.
Preferably, the distance pillars on the cold channel side are shorter than the distance pillars on the hot channel side, so that a narrower cold channel and a wider hot channel are formed, and the heat transfer effect is further enhanced.
Preferably, the distance column is welded at the center of the large bulge, so that the gas flow resistance is effectively reduced.
Preferably, the diameter of the distance column is 6-8mm, the distance column is made of stainless steel, cost is easily increased due to the fact that the distance column is too thick, and the distance column with the diameter of 6-8mm can not only guarantee support, but also save cost.
Preferably, the distance post is a thread-free distance post, so that the cost is saved. The section of the end of the thread-free structure, which is not welded, is flat, so that the thread-free structure is convenient to contact with a large bulge; and the price is lower than that of the screw thread, thus reducing the cost.
Compared with the prior art, the utility model discloses following beneficial effect has:
the heat exchange effect is good, the heat exchange efficiency is high, scaling is not easy to occur, the strength is increased, the resistance is reduced, the cost is saved, and the production process is simple.
Drawings
Fig. 1 is a schematic plan view of the sheet of the present invention;
fig. 2 is a schematic side view of the sheet of the present invention;
fig. 3 is a schematic structural view of the cold aisle of the present invention;
fig. 4 is a schematic structural view of the heat channel of the present invention.
In the figure: 1, a plate sheet; 2. bulging; 3. concave bulging; 4. a cold aisle; 5. a hot aisle; 6. a large bulge; 7. a small bulge; 8. and a distance pole.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings:
as shown in fig. 1-4, the low resistance heat exchange element of the present invention comprises a plurality of plate pairs stacked layer upon layer, each plate pair comprises an upper plate 1 and a lower plate 1 arranged in opposite directions, each plate pair forms a heat channel 5, two adjacent plate pairs form a cold channel 4, a plurality of rows of convex bulges 2 and concave bulges 3 are distributed on the upper surface of the plate 1 along the same axial direction, the convex bulges 2 and the concave bulges 3 are respectively obtained by pressing the plates upwards and downwards, the convex bulges 2 and the concave bulges 3 are distributed in a staggered manner, and the convex bulges 2 and the convex bulges 3 of the upper plate in the plate pairs correspond to the convex bulges 2 and the concave bulges 3 of the lower plate respectively; the convex bulges 2 and the concave bulges 3 respectively comprise large bulges 6 and small bulges 7, the large bulges 6 and the small bulges 7 are round tables and are arranged in a staggered mode, the height of the large bulges 6 is 7-10mm, and the height of the small bulges 7 is 2.5-3 mm.
The small bulges 7 play a role in strengthening the strength of the plate and prevent the plate from increasing the flow resistance, so the height of the small bulges 7 is shorter, and the height of the small bulges 7 is 2.5mm-3 mm. The concave-convex bulges are distributed in a staggered mode to form different flow channel intervals on two sides, the large bulges 6 play a role in supporting the cold channel 4 and the hot channel 5 to form a wide channel for supporting, the height of the large bulges 6 is 7-10mm, and the wide channel is favorable for reducing gas resistance. The big drum bag 6 and the small drum bag 7 are round tables, so that the die is easy to demould, and the production process is simple. The big bulge 6 and the small bulge 7 of the cone are smooth circular arcs on the side walls, and the top surface is a plane, so that the gas flow resistance can be effectively reduced. The design of the bulge structure and the wide channel increases the strength, greatly reduces the resistance, reduces the power of the fan and saves the cost of energy consumption. If all the bulges are supported by the large bulges 6, the good effect of supporting the flow channel can be achieved, but the smoke resistance cannot be reduced; if all the small drum bags 7 are used, although the effect of reinforcing the strength of the plate pieces can be achieved, a wide flow passage cannot be formed, and the resistance is reduced.
For example, the following steps are carried out: when being hot flue gas in cold air, hot passageway 5 in the cold passageway 4, former air heater 1200mm wide with low resistance heat transfer element 1200mm wide slab 1 compares, and under the operating mode that temperature, flow are the same, former flue gas side resistance falls to 2460pa, the air side is 1090pa, changes to the utility model after low resistance heat transfer element, flue gas side resistance falls to 614pa, and air side resistance falls to 247 pa.
The upper surface of the large cone 6 is a plane, so that the contact is convenient to weld and simple in production process.
The bulge structure can effectively enhance fluid disturbance, greatly enhance heat transfer effect, further reduce the volume and the occupied area of equipment, reduce the installation quantity of the equipment, reduce cost and facilitate the operation and maintenance of the equipment. The contact formed by the contact of the large bulges 6 and the small bulges 7 between the plates 1 and the large bulges 6 can ensure that the stress distribution of the plates 1 is uniform, and the deformation caused by temperature difference and vibration can be effectively relieved. The fluid is turbulent flow caused by the uneven surface, so that the self-cleaning function of the heat exchanger is realized, the scaling is not easy to occur, the maintenance cost is low, and the service life is long.
Further, the distance between the large bulges 6 is 300-500mm, and the diameter of the bottom surface is 25-40 mm; the distance between the small bulges 7 is 80-90mm, and the diameter of the bottom surface is 20-25 mm. The large bulges 6 have larger diameter, are convenient to support, have larger distance, are convenient for gas circulation and reduce resistance. The distance between the large bulges 6 is 300-500mm, so that the plate can be effectively supported, and the smoke resistance can be reduced. The small distance between the small bulges 7 is convenient for strengthening the strength of the plate, and the small diameter is convenient for gas circulation and resistance reduction. The diameter of the top surface of the big bulge 6 is 15-30 mm; the diameter of the top surface of the small bump 7 is 15-20 mm. The diameter of the top surface is small, so that the gas circulation is facilitated, and the resistance is reduced.
The distance between the large bulges 6 can be calculated through simulation, and the distance between the bulges can be automatically adjusted according to requirements. The height of the bulge can be selected according to the tensile strength of different plate materials. The compression depth of the concave bulge 3 and the compression depth of the convex bulge 2 on the same plate can be different, and the heights of the bulges on the two sides can be adjusted according to the flow velocity and the resistance of gas media on the two sides. Furthermore, the width of the cold channel 4 is narrower than that of the hot channel 5, so that a narrower cold channel 4 and a wider hot channel 5 are formed, and the heat exchange effect is further enhanced. Further, the large bump 6 on the cold aisle 4 side is smaller in height than the large bump 6 on the hot aisle 5 side to form the narrower cold aisle 4 and the wider hot aisle 5, further enhancing the heat transfer effect.
The height of the big bump 6 is 7-10mm, and a channel of 14-20mm is formed. Further, when the channel pitch is required to be more than 20mm, the large bump 6 is too stretched to reach the tensile limit and is broken. To avoid this, distance posts 8 are provided between the large bulges 6 in the cold aisle 4 and the hot aisle 5, and the distance posts 8 are used for supporting the cold aisle 4 and the hot aisle 5, so that the width of the aisle is further increased, and the gas flow resistance is reduced. At the moment, the height of the large bump 6 is 7-10mm, the height is high, the length of the distance column 8 can be reduced, and the cost is saved. Furthermore, the distance pillars 8 on the cold aisle 4 side are shorter than the distance pillars 8 on the hot aisle 5 side, so that a narrower cold aisle 4 and a wider hot aisle 5 are formed, and the heat transfer effect is further enhanced.
If the distance posts 8 are arranged between the small bulges 7 or the distance posts 8 are directly welded on the plate without bulges, the length of the required distance posts 8 is increased, thereby increasing the cost. For example, 100 distance posts 8 are needed for one plate 1, 5000 distance posts 8 are needed for 50 plates 1, and if the flow channel spacing is required to be 36mm, the height of each large bulge 6 on two sides is 10mm, and the total height is 20 mm. The distance post 8 needs to be 36-20-16 mm long. If the distance posts 8 are welded directly to the plate 1 instead of to the large bulges 6, they need to be 36mm in length. Therefore, 72kg is required for the distance rod 8 with a diameter of 6mm and a length of 36mm, and 32kg is required for the distance rod 8 with a length of 16mm, thereby saving 40kg of the distance rod 8. It follows that adding the distance posts 8 with the big bulge 6 is more cost effective than welding the distance posts 8 on the plate 1 or the small bulge 7.
Furthermore, the distance column 8 can be welded at the center of the large bulge 6, so that the gas flow resistance is effectively reduced.
Furthermore, the diameter of the distance column 8 is 6-8mm, the distance column 8 is made of stainless steel, cost is easily increased due to the fact that the distance column is too thick, and the distance column can guarantee support and save cost due to the fact that the diameter of the distance column 8 is 6-8 mm.
Furthermore, the distance column 8 can be a thread-free distance column, so that the cost is saved. The section of the end of the thread-free structure, which is not welded, is flat, so that the thread-free structure is convenient to contact with the large bulge 6; and the price is lower than that of the screw thread, thus reducing the cost.
When in use, the cold channel 4 can be filled with cold smoke, and the hot channel 5 can be filled with hot smoke. The cold channel 4 can be used for cold air, the hot channel 5 can be used for hot flue gas, the temperature of the cold air is increased by utilizing the heat exchange between the high-temperature flue gas from the heating furnace and the cold air, and the cold air is sent to the heating furnace, so that the fuel is saved, the cost is reduced, and the exhaust temperature is reduced.
It should be noted that the numerical ranges in the present invention include both values. It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a low resistance heat transfer element, includes a plurality of board pairs that stack layer upon layer, and every board pair is including two upper and lower sheets (1) that set up in opposite directions, and every board is to forming hot channel (5), and two adjacent board are to forming cold channel (4), its characterized in that: the upper surface of the plate (1) is distributed with a plurality of rows of convex bulges (2) and concave bulges (3) along the same axial direction, the convex bulges (2) and the concave bulges (3) are respectively obtained by pressing the plate upwards and downwards, the convex bulges (2) and the concave bulges (3) are distributed in a staggered way, and the concave bulges (3) and the convex bulges (2) of the upper plate in the plate pair correspond to the convex bulges (2) and the concave bulges (3) of the lower plate respectively; the convex bulges (2) and the concave bulges (3) respectively comprise large bulges (6) and small bulges (7), the large bulges (6) and the small bulges (7) are round tables and are arranged in a staggered mode, the height of the large bulges (6) is 7-10mm, and the height of the small bulges (7) is 2.5-3 mm.
2. The low resistance heat exchange element of claim 1 wherein: the distance between the large bulges (6) is 300-500mm, and the diameter of the bottom surface is 25-40 mm; the distance between the small bulges (7) is 80-90mm, and the diameter of the bottom surface is 20-25 mm.
3. The low resistance heat exchange element of claim 2 wherein: the diameter of the top surface of the big bulge (6) is 15-30mm, and the diameter of the top surface of the small bulge (7) is 15-20 mm.
4. A low resistance heat exchange element according to any of claims 1 to 3 wherein: a distance column (8) is arranged between the big bulges (6) in the cold channel (4) and the hot channel (5).
5. The low resistance heat exchange element of claim 4 wherein: the height of the big bulge (6) at the cold channel (4) side is smaller than that of the big bulge (6) at the hot channel (5) side.
6. The low resistance heat exchange element of claim 4 wherein: the distance column (8) on the cold tunnel (4) side is shorter than the distance column (8) on the hot tunnel (5) side.
7. The low resistance heat exchange element of claim 5 or 6 wherein: the distance column (8) is welded at the center of the large bulge (6).
8. The low resistance heat exchange element of claim 7 wherein: the diameter of the distance column (8) is 6-8 mm.
9. The low resistance heat exchange element of claim 8 wherein: the distance column (8) is a non-threaded distance column.
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| CN201921172589.8U CN210952452U (en) | 2019-07-24 | 2019-07-24 | Low-resistance heat exchange element |
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| CN201921172589.8U CN210952452U (en) | 2019-07-24 | 2019-07-24 | Low-resistance heat exchange element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294982A (en) * | 2021-12-28 | 2022-04-08 | 北京瑞晨航宇能源科技有限公司 | Pure countercurrent plate heat exchanger adopting asymmetric heat exchange plates |
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2019
- 2019-07-24 CN CN201921172589.8U patent/CN210952452U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294982A (en) * | 2021-12-28 | 2022-04-08 | 北京瑞晨航宇能源科技有限公司 | Pure countercurrent plate heat exchanger adopting asymmetric heat exchange plates |
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