KR100562430B1 - Waste heat collector - Google Patents

Abstract

The present invention relates to a waste heat recovery device for recovering heat from a high temperature fluid and transferring it to a low temperature fluid, wherein the high temperature fluid flow path and the low temperature fluid flow path in which the high temperature fluid and the low temperature fluid flow, respectively, are alternately stacked to allow mutual heat transfer. A recovery main body provided with a plurality of separation members; At least one partition wall passing portion is provided to allow the low temperature fluid to pass therethrough, and the at least one partition wall disposed in the low temperature fluid flow path and coupled to the separation member to divide the low temperature fluid flow path. As a result, the heat transfer efficiency can be improved, and the structure of the recovery base body can be reinforced.

Description

Waste Heat Recovery Machine {WASTE HEAT COLLECTOR}

1 is a perspective view of a waste heat recoverer according to the present invention;

2 is a partially exploded perspective view of the waste heat recoverer according to the present invention;

3 is a III-III cross-sectional view of the waste heat recoverer of FIG.

4 is a cross-sectional view IV-IV of the waste heat recoverer of FIG. 1;

5 is a partially exploded perspective view of a partition provided in a waste heat recovery device according to the present invention;

6 is a cross-sectional view of the air backflow prevention device of the waste heat recovery unit according to the present invention,

7 is a cross-sectional view showing another embodiment of the air backflow prevention device of the waste heat recovery unit according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: recovering base body 11: outer casing

13: upper casing 15: lower casing

17: side casing 20: separation member

21: horizontal plate 22: vertical plate

27: flow path connecting portion 29: arc shape

30: low temperature fluid inlet 31: low temperature fluid inlet

33: low temperature fluid discharge part 40: high temperature fluid flow path

41: high temperature fluid inlet 43: high temperature fluid outlet

45: high temperature fluid distribution plate 50: partition wall

51: bulkhead through portion 60: air backflow prevention device

61: backflow prevention member

The present invention relates to a waste heat recovery device, and more particularly, to a waste heat recovery device having an improved structure to improve heat transfer from a high temperature fluid to a low temperature fluid.

In general, the waste heat recoverer is an energy-saving heat exchanger that can recover the heat energy latent in a high temperature fluid such as high temperature waste water and recycle the heat of the high temperature fluid which is discarded and transferred to a low temperature fluid such as low temperature fresh water.

Waste heat recovery machine has been developed in various forms such as tubular, plate, and spiral type that constitute the recovery base body, which is a heat exchanger, such as multi-pipe, multi-layer spiral plate, and multi-layer panel so as to effectively perform heat exchange.

As described above, the conventional waste heat recoverer has been developed in various ways to effectively recover energy, but the structure of the recovering base is too complicated, causing various problems. That is, the conventional waste heat recoverer is not only easy to manufacture because the structure of the recovering base is composed of a multi-pipe or multi-layered spiral plate, but also can inhibit the smooth flow of high-temperature fluids and low-temperature fluids. It is easy to cause cracks in the process, and there is a problem in that a cleaning operation for frequently removing the foreign matters is carried out because the foreign matters mixed in the high temperature fluid are caught in a complicated high temperature fluid flow path or stagnated and deposited at a weak flow rate. In addition, if the waste heat recoverer provides a separate member on the low temperature fluid passage to promote heat transfer and reinforce the structure, the heat transfer efficiency from the high temperature fluid to the low temperature fluid may be improved.

Accordingly, an object of the present invention is to provide a waste heat recovery device which can improve the heat transfer efficiency and can reinforce the structure of the recovery base body.

According to the present invention, in the waste heat recovery device for recovering heat from a high temperature fluid and transferring it to a low temperature fluid, the high temperature fluid flow path and the low temperature fluid flow path in which the high temperature fluid and the low temperature fluid flow, respectively, are alternately capable of heat transfer. A recovery main body provided with a plurality of separating members so as to be stacked in a stack; At least one partition wall passing portion is provided to allow the low temperature fluid to pass therethrough, and the waste heat recovery device includes at least one partition wall disposed in the low temperature fluid flow path and coupled to the separation member to divide the low temperature fluid flow path. Is achieved by

The recovery main body may include a plurality of flow path connecting portions connecting the plurality of separation members to form a single low temperature fluid flow path, and each flow path connecting portion may include an arc-shaped cross section.

The plurality of separating members forming the low temperature fluid passage may be alternately arranged in a zigzag shape to be eccentrically to one side.

The high temperature fluid flows from the upper region to the lower region of the recovery main body, and an air backflow prevention device may be provided in the outlet region of the high temperature fluid to prevent air from flowing back along the high temperature fluid passage.

The air backflow prevention device includes a backflow prevention member formed downward in the separation member provided above the high temperature fluid flow path in a horizontal direction of the flow direction of the high temperature fluid in the high temperature fluid flow path close to the outlet region of the high temperature fluid flow path. Can be.

The air backflow prevention device includes: an inclined plate disposed in the transverse direction of the flow direction of the hot fluid in the hot fluid flow passage proximate to the outlet region of the hot fluid and inclined in the flow direction of the hot fluid; A passage through portion penetrated by the high temperature fluid through the inclined plate; It may be rotatably provided to open and close the flow passage through the inclined plate, and may include a backflow prevention damper that is opened by the flow of high-temperature fluid and closes the flow passage through self weight.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 6, the waste heat recovery device according to the present invention is a hot fluid flow path 40 and a low temperature fluid flow through which the hot fluid and the low temperature fluid flows to recover heat from the high temperature fluid and transfer the heat to the low temperature fluid. Separated to divide the low temperature fluid flow path (30) disposed in the low temperature fluid flow path (30) and the recovery main body 10 is provided with a plurality of separating members 20 to alternately stack the (30) to enable mutual heat transfer. At least one partition wall 50 coupled to the member 20. In the waste heat recoverer according to the present invention, a high temperature fluid flows from the upper region to the lower region of the recovery main body 10, and an air backflow preventing the air from flowing back along the high temperature fluid passage 40 in the outlet region of the high temperature fluid. Prevention device 60 may be provided. In addition, the waste heat recovery device according to the present invention, for example, the hot fluid flows from the upper region to the lower region of the recovery main body 10, the low temperature fluid may flow from the lower region of the recovery base 10 to the upper region. That is, the high temperature fluid is introduced from the upper casing 13 of the recovery base 10 to be described later and discharged into the lower region to the side casing 17 of the recovery base 10 to be described later, and the low temperature fluid is the recovery base 10 to be described later. Inflow from the lower casing 15 of the) may be discharged to the upper casing 13 of the recovery main body 10 to be described later. In addition, the high temperature fluid may be introduced into the upper region of the side casing 17 of the recovery body 10 to be described later, or may be discharged to the lower casing 15 of the recovery body 10 to be described later. In addition, the low temperature fluid may be introduced into the lower region of the side casing 17 of the recovering body 10, which will be described later, and discharged into the upper region of the side casing 17 of the recovering body 10, which will be described later.

The recovery main body 10 is a separation member 20 provided so that the low temperature fluid is separated from the high temperature fluid to form the low temperature fluid flow path 30, and the recovery base body is coupled to the separation member 20 outside the separation member 20. And an outer casing 11 forming the appearance of 10).

The high temperature fluid supplied to the recovery base 10 may be high temperature wastewater or oil used in a factory or a bathroom, or may be a high temperature liquid material made for various other purposes. The low temperature fluid supplied to the recovery base 10 may be a low temperature liquid material having a lower temperature than a high temperature fluid such as fresh water or oil that is heated by receiving thermal energy from the high temperature fluid.

The high temperature fluid introduced into the recovery main body 10 may flow in the horizontal direction of the flow direction of the low temperature fluid with the separation member 20 therebetween. However, the high temperature fluid may flow in a direction opposite to the flow direction of the low temperature fluid with the separation member 20 therebetween. The recovery base 10 includes a plurality of flow path connecting portions 27 connecting the plurality of separation members 20 to form a single low temperature fluid flow path 30.

The outer casing 11 has an upper casing 13 provided on the upper part of the recovering main body 10, a lower casing 15 provided on the lower part of the recovering main body 10, and an upper casing provided on the side of the recovering main body 10. 13) and the side casing 17 in combination with the lower casing 15.

The upper casing 13 is preferably provided on the plate flat. That is, as an example, as shown in Figure 1, when the recovery main body 10 is provided in a rectangular box shape, the upper casing 13 is provided in a rectangular plate shape. However, the upper casing 13 may be provided in other shapes, such as a disc, depending on the shape of the recovery main body 10. The upper casing 13 is provided with a high temperature fluid inlet part 41 for introducing a high temperature hot fluid into the recovery main body 10, and a low temperature fluid discharge part 43 for discharging the low temperature fluid from the recovery main body 10. Can be. The high temperature fluid flow path 40 formed by the upper casing 13 and the separation member 20 distributes the high temperature fluid introduced from the high temperature fluid inlet portion 41 to the separation member 20 to promote heat transfer. The distribution plate 45 may be prepared.

The high temperature fluid inlet part 41 and the high temperature fluid discharge part 43 to be described later may penetrate into a long hole shape in the present invention, or may be penetrated into various shapes such as a circular shape. The low temperature fluid discharge part 43 and the low temperature fluid inflow part 31 to be described later may penetrate in a circular shape in the present invention, or may be penetrated in various shapes such as a long hole shape.

The high temperature fluid distribution plate 45 may uniformly distribute the high temperature fluid introduced from the high temperature fluid inlet 41 to the horizontal plate 21 of the separating member 20 to be described later in response to the high temperature fluid inlet 41. It may be provided in a plate shape.

The lower casing 15 is preferably provided on the plate flat. That is, as an example, as shown in Figure 1, when the recovery main body 10 is provided in a rectangular box shape, the lower casing 15 is provided in a rectangular plate shape. However, the lower casing 15 may be provided in another shape such as a disc according to the shape of the recovery main body 10. The lower casing 15 may be provided with a low temperature fluid inlet 31 for introducing low temperature fluid into the waste heat recovery unit.

As shown in FIG. 1, the side casing 17 is provided in four plate shapes so as to be disposed on four side surfaces of the recovery main body 10 when the recovery main body 10 is provided in a rectangular box shape. However, the side casing 17 may also be provided in various shapes such as a cylindrical shape according to the shape of the recovery main body 10. In the lower region of the side casing 17, a high temperature fluid discharge part 43 for discharging the high temperature fluid may be provided.

The separating member 20 may be provided in a plate shape to enable heat transfer between the low temperature fluid passage 30 and the high temperature fluid passage 40. In addition, the separating member 20 may use a plate formed with irregularities or wrinkles to promote heat transfer between the low temperature fluid passage 30 and the high temperature fluid passage 40. Separation member 20 is a horizontal plate (20) to form a plurality of horizontal plates 21 and the low temperature fluid flow path (30) stacked so that the high temperature fluid flow path 40 and the low temperature fluid flow path (30) are formed alternately. And a plurality of vertical plates 22 coupled with 21). The plurality of separating members 20 may be alternately eccentric to one side and arranged in a zigzag shape. That is, as shown in FIG. 4, the odd-numbered or even-numbered separating members 20 are arranged in a zigzag shape at the lower side of the plurality of separating members 20 forming the low temperature fluid flow path 30. In addition, by using the eccentric space of the separating member 20 as the high temperature fluid flow path 40, the high temperature fluid flow path 40 can be easily and widely secured, thereby forming a simple high temperature fluid flow path with a simple structure. The flow can be smooth. In addition, the recovery base 10 is coupled to the horizontal plate 21, the vertical plate 22, and the outer casing 11 to support the horizontal plate 21 and the vertical plate 22, and the low temperature fluid flow path 30 and A vertical bulkhead 25 and a horizontal bulkhead 24 forming the high temperature fluid passage 40 may be further included.

The horizontal plate 21 is stacked in a plurality of spaced apart in a plate shape and arranged to be almost horizontal. However, the horizontal plate 21 may be arranged to be somewhat inclined to facilitate the flow of the high temperature fluid and the low temperature fluid. The horizontal plate 21 may promote heat transfer by turbulizing at least one of a high temperature fluid and a low temperature fluid using a plate material having irregularities or wrinkles formed thereon.

The vertical plate 22 is coupled to the ends of the plurality of horizontal plates 21 in the shape of a plate or a square material to form a low temperature fluid passage 30. Vertical plate 22 may also be used to promote the heat transfer of the high temperature fluid and low temperature fluid using a plate formed with irregularities or wrinkles. If the vertical plate 22 and the horizontal plate 21 can be fastened by welding or bolts, etc. with the vertical plate 22 and the outer casing 11, a separate sealing member is installed at the coupling portion to provide a high temperature fluid and a low temperature fluid. It can prevent the mixing and leakage more effectively. The vertical plate 22 and the horizontal plate 21 is preferably made of a thermally conductive metal to facilitate heat transfer.

As shown in FIGS. 2 and 3, the vertical bulkhead 25 is coupled to both ends of the horizontal plate 21 and the vertical plate 22 to support the horizontal plate 21 and the vertical plate 22. The high temperature fluid passage 40 is formed together with the plate 21, the vertical plate 22, and the outer casing 11. The vertical bulkhead 25 is provided with a plate accommodating part 26 to accommodate and combine the plurality of horizontal plates 21 and the vertical plates 22.

The horizontal bulkhead 24 is coupled to the vertical bulkhead 25 and the outer casing 11 adjacent to the low temperature fluid inlet part 31 and the low temperature fluid discharge part 43 to receive the low temperature fluid introduced into the low temperature fluid inlet part 31. The low temperature fluid discharged from the separation member 20 or discharged from the separation member 20 is guided to the low temperature fluid discharge part 43. And, if the vertical bulkhead 25 and the horizontal bulkhead 24 can be fastened by welding or bolts, etc. with the separating member 20 and the outer casing 11, by installing a separate sealing member (not shown) in the coupling portion The hot and cold fluids can be more effectively prevented from intermixing or leaking. The vertical bulkhead 25 and the horizontal bulkhead 24, the vertical plate 22, the horizontal plate 21, and the like are preferably made of a metal having good thermal conductivity so that heat transfer is performed well.

The flow path connecting portion 27 is alternately coupled to the ends of each of the horizontal plate 21 and the vertical plate 22 in a zigzag form so that the low temperature fluid can rise along the arc of the arc. The flow path connecting portion 27 includes a connecting through portion 28 penetrated so as to be connected to the low temperature fluid flow path 30, and an arc-shaped portion 29 having an arc-shaped cross section, in the horizontal direction of the flow direction of the low temperature fluid. It is formed long. If the flow path connecting portion 27 may be coupled to the vertical bulkhead 25 by a bolt (not shown), it may be coupled by welding or the like. A separate sealing member (not shown) may be installed at the coupling portion of the flow path connecting portion 27 to prevent the high temperature fluid and the low temperature fluid from mixing or leaking each other more effectively. Thus, by providing the flow passage connecting portion 27 in an arc-shaped cross section, it is possible to smoothly flow the low-temperature fluid flowing between the separating member 20 provided on the upper side from the separating member 20 provided on the lower side.

The partition wall 50 is coupled to the horizontal plate 21 forming the low temperature fluid passage 30 in the flow direction of the low temperature fluid. The partition wall 50 is horizontally coupled to the plate surfaces of the plurality of horizontal plates 21 forming the low temperature fluid flow path 30. The partition wall 50 is preferably provided in plural in each separating member 20 to divide the low temperature fluid passage 30 into plural, but may be provided in one in each separating member 20. Accordingly, the partition wall 50 may support the plurality of horizontal plates 21 forming the low temperature fluid passage 30 in the vertical direction to reinforce the horizontal plates 21 heated to high temperature by high temperature fluid, and separate each. The low temperature fluid flow path 30 formed in the member 20 may be divided into a plurality of parts to facilitate the flow of the low temperature fluid. In addition, the partition wall 50 may be formed of a metal having good thermal conductivity to transfer heat conducted through the horizontal plate 21 to the low temperature fluid, thereby increasing the contact area with the low temperature fluid, thereby promoting heat transfer. In addition, the partition wall 50 may be provided with at least one partition wall passing portion 51 to allow the low-temperature fluid to pass through. The partition wall 50 may be provided with a protrusion (not shown) protruding in the horizontal direction of the plate surface of the partition wall 50.

The partition wall penetrating portion 51 is preferably provided in plurality in the longitudinal direction on the partition wall 50, but may be provided as one. Thus, the partition wall passage part 51 allows the low-temperature fluid to pass through the partition 50, thereby preventing the pressure difference between the fluid 50 from occurring, and promoting turbulence of the flowing low-temperature fluid. The heat transfer efficiency can be improved. In addition, one or more protrusions (not shown) may be provided on the partition wall 50, but may be provided as one. Protrusions (not shown) may be provided in connection with the partition wall portion 51, it may be provided separately. Thus, by promoting the turbulence of the low-temperature fluid flowing through the partition 50 by the projection (not shown) it can further improve the heat transfer efficiency.

Air flow prevention device 60 is the air generated in the high temperature fluid discharge portion 43 area when the flow rate of the high temperature fluid is reduced or the supply of the high temperature fluid is stopped and supplied again to the high temperature fluid flow path 40 Therefore, it is a device for preventing backflow in the flow direction of the high temperature fluid. However, when air is introduced to flow back along the high temperature fluid passage 40, the heat transfer area between the high temperature fluid and the separating member 20 is reduced, thereby lowering heat transfer efficiency. The air backflow prevention device 60 includes a backflow prevention member 61 protruding downwardly from the separation member 20 above the high temperature fluid passage 40 near the outlet region of the high temperature fluid.

The non-return member 61 is formed long in the flow direction of the hot fluid in the transverse direction so that air generated in the hot fluid discharge portion 43 does not flow back along the hot fluid flow path 40. In addition, the backflow prevention member 61 may be formed to extend to a lower position than the high temperature fluid discharge part 43 provided in the lower region of the side casing 17. That is, as shown in FIG. 6, when the backflow preventing member 61 extends to a lower position than the bottom of the high temperature fluid discharge part 43, air may be prevented from flowing into the backflow preventing member 61. Thus, by preventing the inflow of the air along the high temperature fluid flow path 40 by the backflow prevention member 61 it can be prevented that the heat transfer efficiency is lowered.

7 is a cross-sectional view showing another embodiment of the air backflow prevention device of the waste heat recovery unit according to the present invention.

Airflow backflow prevention device 60 according to another embodiment is inclined plate disposed in the horizontal direction of the flow direction of the hot fluid in the hot fluid flow path 40 near the outlet area of the hot fluid and inclined in the flow direction of the hot fluid ( 65, the flow passage portion 66 through which the high temperature fluid passes through the inclined plate 65, and the flow passage portion 66 is rotatably provided to open and close the flow passage portion 66 in the inclined plate 65, And a backflow prevention damper 63 which is opened by and closes the flow passage portion 66 by its own weight.

The inclined plate 65 may be disposed in the transverse direction of the flow direction of the hot fluid in the hot fluid flow path 40 adjacent to the hot fluid discharge part 43. The inclined plate 65 is inclined closer to the hot fluid discharge portion 43 in the lower side than the upper side.

The flow passage portion 66 penetrates in a rectangular shape in the central region of the inclined plate 65. However, the passage passage portion 66 may be penetrated into the inclined plate 65 in a different shape such as a circle corresponding to the backflow prevention damper 63.

The backflow prevention damper 63 is provided in a plate shape, and the upper side thereof is coupled by the inclined plate 65 and the hinge portion 64 to be rotatable. At least one of the edge of the non-return damper 63 and the edge of the flow passage 66 has air flowing into the hot fluid flow path 40 when the non-return damper 63 closes the flow passage 66 by its own weight. The sealing member 67 is provided to prevent the inflow easily. Thus, the air backflow prevention device 60 according to another embodiment may prevent the air from flowing along the high temperature fluid passage 40, thereby preventing the heat transfer efficiency from being lowered.

By this configuration, look at the operation of the waste heat recovery according to the present invention.

First, the high temperature fluid and the low temperature fluid are supplied through the high temperature fluid inlet 41 and the low temperature fluid inlet 31. That is, the high temperature fluid is dropped by the weight along the high temperature fluid flow path 40 and discharged to the high temperature fluid discharge part 43, and the low temperature fluid is raised along the high temperature fluid flow path 40 by a pump (not shown) to cool the low temperature fluid. It is discharged to the discharge part 43. At this time, heat transfer is performed between the high temperature fluid and the low temperature fluid through the separating member 20. And, by the partition 50 provided on the low temperature fluid flow path 30, the heat transfer efficiency can be improved, and the structure of the recovery base body 10 can be reinforced more robustly. In addition, by providing the air backflow prevention device 60 on the high temperature fluid passage 40, it is possible to prevent the heat transfer efficiency from being lowered.

As described above, the waste heat recovery device according to the present invention includes a recovery main body provided with a plurality of separation members such that the hot fluid flow path and the low temperature fluid flow in which the high temperature fluid and the low temperature fluid flow, respectively, are alternately stacked to allow heat transfer, and the low temperature fluid flow path. At least one partition wall disposed within and coupled to the separating member to divide the low temperature fluid flow path may improve heat transfer efficiency, and may further reinforce the structure of the recovery base body. In addition, by providing an air backflow prevention device in the high temperature fluid flow path ^, it is possible to prevent the heat transfer efficiency from being lowered.

As described above, according to the present invention, the heat transfer efficiency can be improved, and the structure of the recovery base body can be reinforced.

In addition, an air backflow prevention device may be provided to prevent the heat transfer efficiency from being lowered.

Claims (7)

In the waste heat recovery device for recovering heat from the high temperature fluid to transfer to the low temperature fluid, A recovery main body provided with a plurality of separation members such that the high temperature fluid flow path and the low temperature fluid flow path in which the high temperature fluid and the low temperature fluid flow, respectively, are alternately stacked in a manner of mutual heat transfer; At least one partition wall passing portion is provided to allow the low temperature fluid to pass therethrough, and the waste heat recovery device includes at least one partition wall disposed in the low temperature fluid flow path and coupled to the separation member to divide the low temperature fluid flow path. . delete The method of claim 1, The recovery main body includes a plurality of flow path connecting portions connecting the plurality of separation members to form a single low temperature fluid flow path, Each of the flow path connecting parts comprises a circular arc-shaped cross section. The method of claim 1, The plurality of separating members forming the low-temperature fluid flow path is alternately arranged in a zigzag shape to be eccentric to one side. The method according to any one of claims 1, 3 and 4, The high temperature fluid flows from the upper region to the lower region of the recovering base body, the waste heat recovery device is provided in the outlet region of the high temperature fluid to prevent the back flow of air along the high temperature fluid flow path. The method of claim 5, The air backflow prevention device includes a backflow prevention member formed downward in the separation member provided above the high temperature fluid flow path in a horizontal direction of the flow direction of the high temperature fluid in the high temperature fluid flow path close to the outlet region of the high temperature fluid flow path. Waste heat recovery, characterized in that. The method of claim 5, The air backflow prevention device, An inclined plate disposed in the transverse direction of the flow direction of the hot fluid and inclined in the flow direction of the hot fluid in the hot fluid flow passage proximate the outlet region of the hot fluid; A passage through portion penetrated by the high temperature fluid through the inclined plate; And a backflow prevention damper rotatably provided to open and close the flow passage through the inclined plate, the back flow prevention damper being opened by the flow of a high temperature fluid and closing the flow passage through self weight.

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