Double-channel falling film heat exchanger

Abstract

The utility model discloses a double-channel falling film heat exchanger which comprises a shell, and the shell comprises a feeding area, a heat exchange area and a discharging area which are sequentially arranged from top to bottom. And the feeding area comprises a circulating water inlet. And the discharging area comprises a circulating water outlet. The heat exchange area comprises a plurality of heat exchange plates. The multiple heat exchange plates are arranged at intervals and comprise inter-plate channels and in-plate channels. And an in-plate channel is arranged in each heat exchange plate. In the heat exchange area, a first refrigerant inlet pipe and a first refrigerant outlet pipe are respectively communicated with in-plate channels of part of heat exchange plates to form a first cooling channel; and the second refrigerant inlet pipe and the second refrigerant outlet pipe are respectively communicated with the in-plate channels of the other part of heat exchange plates to form a second cooling channel. The double-system heat exchanger is different from a single-system heat exchanger, the cooling effect is better, the efficiency is higher, and the situation that energy of a single system with the same heat exchange quantity is insufficient is indirectly avoided through two-inlet and two-outlet refrigerants.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a double-channel falling film heat exchanger. Background Art

[0002] In the prior art, the working mode of falling film heat exchangers often adopts a single-channel cooling mode, which is prone to energy shortage and affects the overall heat exchange efficiency. In addition, the cooling medium used in single-channel falling film heat exchangers often contains certain organic matter in order to improve the heat exchange efficiency, which is easy to cause environmental pollution. Utility Model Content

[0003] In order to overcome the above disadvantages, the purpose of the present invention is to provide a dual-channel falling film heat exchanger to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is a double-channel falling film heat exchanger, comprising:

[0005] The shell extends along the first direction. The shell includes a feed area, a heat exchange area and a discharge area arranged in sequence from top to bottom. The feed area includes a circulating water inlet. The discharge area includes a circulating water outlet.

[0006] The heat exchange area includes a plurality of heat exchange plates. The plurality of heat exchange plates are arranged at intervals along the second direction, including inter-plate channels and intra-plate channels, and the first direction is perpendicular to the second direction. Each of the heat exchange plates extends along the first direction, and is provided with the intra-plate channel inside. The circulating water inlet, the inter-plate channel and the circulating water outlet are connected to each other for circulating water to flow.

[0007] The heat exchange area further includes a first refrigerant inlet pipe, a first refrigerant outlet pipe, a second refrigerant inlet pipe, and a second refrigerant outlet pipe. The first refrigerant inlet pipe and the first refrigerant outlet pipe are respectively connected to the plate channels of a part of the heat exchange plates to form a first cooling channel. The second refrigerant inlet pipe and the second refrigerant outlet pipe are respectively connected to the plate channels of another part of the heat exchange plates to form a second cooling channel.

[0008] The utility model provides a dual-channel falling film heat exchanger, in which the refrigerant passes through the plate channels inside the multiple heat exchange plates and exchanges heat with the circulating water in the inter-plate channels. The refrigerant used in this solution is a refrigerant that is converted from liquid to gas to absorb heat and cool down. It is just a simple physical change. No electricity or other energy is required in this process. After the circulating water enters the heat exchange area, it is cooled by its own gravity and falls freely. No other harmful substances are produced in the whole process. The dual-system heat exchanger is different from the single-system heat exchanger. It has better cooling effect and faster efficiency. The two-in and two-out refrigerant also indirectly avoids the situation of insufficient energy in a single system with the same heat exchange amount.

[0009] In some embodiments, the first refrigerant inlet pipe and the first refrigerant outlet pipe both extend along the second direction and are disposed on one side of the plurality of heat exchange plates along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The first refrigerant inlet pipe includes a plurality of first sub-pipes, the plurality of first sub-pipes are disposed corresponding to the positions of the part of the heat exchange plates, and each of the first sub-pipes is connected to the corresponding flow channel. The first refrigerant outlet pipe includes a plurality of second sub-pipes, the plurality of second sub-pipes are disposed corresponding to the positions of the part of the heat exchange plates, and each of the second sub-pipes is connected to the corresponding flow channel.

[0010] The second refrigerant inlet pipe and the second refrigerant outlet pipe both extend along the second direction and are arranged on one side of the plurality of heat exchange plates along the third direction. The second refrigerant inlet pipe includes a plurality of third sub-pipes, the plurality of third sub-pipes are arranged corresponding to the positions of the other part of the heat exchange plates, and each of the third sub-pipes is connected to the corresponding flow channel. The second refrigerant outlet pipe includes a plurality of fourth sub-pipes, the plurality of fourth sub-pipes are arranged corresponding to the positions of the other part of the heat exchange plates, and each of the fourth sub-pipes is connected to the corresponding flow channel.

[0011] By adopting the above technical solution, the first refrigerant inlet pipe and the first refrigerant outlet pipe, the second refrigerant inlet pipe and the second refrigerant outlet pipe are respectively connected to each heat exchange half plate through multiple sub-tubes to circulate the refrigeration in the channel inside the plate.

[0012] In some embodiments, along the third direction, the first refrigerant inlet pipe and the second refrigerant inlet pipe are located on the same straight line, and the first refrigerant outlet pipe and the second refrigerant outlet pipe are located on the same straight line.

[0013] In some embodiments, along the first direction, the first refrigerant outlet pipe and the second refrigerant outlet pipe are arranged at the top of the plurality of heat exchange plates, and the first refrigerant inlet pipe and the second refrigerant inlet pipe are arranged at the bottom of the plurality of heat exchange plates.

[0014] With the above technical solution, the outlet pipe of the refrigerant is arranged above the inlet pipe. During heat exchange, the refrigerant changes from liquid to gas, rises due to its own gravity, and absorbs the heat of the circulating water to cool it down.

[0015] In some embodiments, the feed area further comprises an annular water tank. The circulating water inlet is arranged on one side of the annular water tank along the third direction. The annular water tank comprises a hollow area, and a liquid distribution tray is arranged at the bottom of the hollow area. The liquid distribution tray comprises a plurality of diversion holes arranged at intervals along the second direction and the third direction.

[0016] The heat exchange area further comprises a guide plate, which extends along the second direction and is provided with a plurality of through holes corresponding to the positions of the inter-plate channels.

[0017] By adopting the above technical solution, the circulating water flows from the water inlet to the water tank module, and then through the neatly arranged guide holes and guide plates on the liquid distribution plate at the bottom of the water tank, evenly flows through each heat exchange plate, forming an uninterrupted water film of uniform thickness outside the plate. After being cooled by the refrigerant in the plate, the circulating water flows out from the outlet.

[0018] In some embodiments, the discharge area further comprises a water outlet filter plate and a support frame. The water outlet filter plate is arranged below the plurality of heat exchange plates. The support frame is arranged below the shell.

[0019] With the above technical solution, the support frame is located below the shell to support the components above. The water outlet filter plate is arranged below the plurality of heat exchange plates to buffer the falling of circulating water.

[0020] In some embodiments, the housing further comprises a plurality of cleaning doors, which are respectively disposed on the top of the housing, on both sides along the second direction, and on both sides along the third direction, for detachably closing the hollow area and the heat exchange area.

[0021] By adopting the above technical solution, the cleaning door is installed in a detachable manner, which is convenient for maintenance and disassembly and replacement of the heat exchange plates, and inspection of the annular water tank and the liquid distribution tray.

[0022] In some embodiments, the dual-channel falling film heat exchanger further comprises a ladder, which is disposed on the other side of the plurality of heat exchange plates along the third direction.

[0023] By adopting the above technical solution, the staff can inspect and repair the double-channel falling film heat exchanger by climbing the ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of an embodiment of a double-channel falling film heat exchanger according to the utility model Figure 1 ;

[0025] Figure 2 A three-dimensional diagram of an embodiment of a double-channel falling film heat exchanger according to the utility model Figure 2 ;

[0026] Figure 3 It is a partial structural schematic diagram of an embodiment of a double-channel falling film heat exchanger of the utility model;

[0027] In the figure:

[0028] 1-dual-channel falling film heat exchanger; 2-shell; 20-cleaning door; 3-feeding area; 30-circulating water inlet; 31-annular water tank; 32-hollow area; 33-liquid distribution tray; 34-guide hole; 4-heat exchange area; 40-heat exchange plate; 41-first refrigerant inlet pipe; 42-first refrigerant outlet pipe; 43-second refrigerant inlet pipe; 44-second refrigerant outlet pipe; 45-first sub-tube; 46-second sub-tube; 47-third sub-tube; 48-fourth sub-tube; 49-guide plate; 490-through hole; 5-discharge area; 50-circulating water outlet; 51-outlet filter plate; 52-support frame; 6-ladder. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0030] refer to Figure 1 to Figure 3 , Figure 1 The three-dimensional diagram of a double-channel falling film heat exchanger 1 provided by the embodiment of the utility model is shown. Figure 1 ; Figure 2 The three-dimensional diagram of a double-channel falling film heat exchanger 1 provided by the embodiment of the utility model is shown. Figure 2 ; Figure 3 A partial structural schematic diagram of a dual-channel falling film heat exchanger 1 provided in an embodiment of the utility model is shown.

[0031] like Figure 1 to Figure 3 As shown in the figure, the technical solution provided by the present application is shown: a dual-channel falling film heat exchanger 1, comprising a shell 2, wherein the shell 2 is along a first direction ( Figure 1 The heat exchange zone 4 extends in the second direction (Z direction), and includes a feed zone 3, a heat exchange zone 4 and a discharge zone 5 arranged in sequence from top to bottom. The feed zone 3 includes a circulating water inlet 30. The discharge zone 5 includes a circulating water outlet 50. The heat exchange zone 4 includes a plurality of heat exchange plates 40. The plurality of heat exchange plates 40 extend in the second direction ( Figure 1The heat exchange plates are arranged at intervals (indicated by the Y direction in the middle), including inter-plate channels and intra-plate channels, and the first direction is perpendicular to the second direction. Each heat exchange plate extends along the first direction and is provided with an intra-plate channel inside. The circulating water inlet 30, the inter-plate channel and the circulating water outlet 50 are connected to provide circulating water.

[0032] The heat exchange area 4 also includes a first refrigerant inlet pipe 41, a first refrigerant outlet pipe 42, a second refrigerant inlet pipe 43 and a second refrigerant outlet pipe 44. The first refrigerant inlet pipe 41 and the first refrigerant outlet pipe 42 are respectively connected to the plate channels of a part of the heat exchange plates 40 to form a first cooling channel. The second refrigerant inlet pipe 43 and the second refrigerant outlet pipe 44 are respectively connected to the plate channels of another part of the heat exchange plates 40 to form a second cooling channel.

[0033] The dual-channel falling film heat exchanger 1 provided by the present application has a refrigerant passing through the plate channels inside the multiple heat exchange plates 40 to exchange heat with the circulating water in the inter-plate channels. The refrigerant used in this solution is a refrigerant that is converted from liquid to gas to absorb heat and cool down. It is just a simple physical change. No electricity or other energy is required in this process. After the circulating water enters the heat exchange area 4, it is cooled by its own gravity and falls freely. No other harmful substances are produced in the whole process. The dual-system heat exchanger is different from the single-system heat exchanger. It has a better cooling effect and faster efficiency. The two-in and two-out refrigerant also indirectly avoids the situation of insufficient energy in a single system with the same heat exchange amount.

[0034] In some embodiments, reference Figure 1 to Figure 3 Each heat exchange plate 40 extends along the first direction and has a flow channel inside. The flow channels of the plurality of heat exchange plates 40 constitute an intra-plate channel.

[0035] For example, the heat exchange plate 40 used in this embodiment is a pillow-shaped plate, which has a smooth surface and is not easy to stick to impurities or small floating objects in the circulating water. The entire plate group can change the number and gap of plates according to the working conditions, and can meet the cooling of circulating water in different conditions.

[0036] In some embodiments, reference Figure 1 to Figure 3 The first refrigerant inlet pipe 41 and the first refrigerant outlet pipe 42 both extend in the second direction and are arranged on the plurality of heat exchange plates 40 along the third direction ( Figure 1 The first refrigerant inlet pipe 41 includes a plurality of first sub-pipes 45, which are arranged corresponding to the positions of some heat exchange plates 40, and each first sub-pipe 45 is connected to a corresponding flow channel. The first refrigerant outlet pipe 42 includes a plurality of second sub-pipes 46, which are arranged corresponding to the positions of some heat exchange plates 40, and each second sub-pipe 46 is connected to a corresponding flow channel.

[0037] The second refrigerant inlet pipe 43 and the second refrigerant outlet pipe 44 both extend in the second direction and are disposed on one side of the plurality of heat exchange plates 40 along the third direction. The second refrigerant inlet pipe 43 includes a plurality of third sub-pipes 47, which are disposed correspondingly to another portion of the heat exchange plates 40, and each third sub-pipe 47 is connected to a corresponding flow channel. The second refrigerant outlet pipe 44 includes a plurality of fourth sub-pipes 48, which are disposed correspondingly to another portion of the heat exchange plates 40, and each fourth sub-pipe 48 is connected to a corresponding flow channel.

[0038] Exemplarily, the first refrigerant inlet pipe 41 and the first refrigerant outlet pipe 42, the second refrigerant inlet pipe 43 and the second refrigerant outlet pipe 44 are respectively connected to each heat exchange half plate through a plurality of sub-pipes to circulate the refrigerant in the channel inside the plate.

[0039] In some embodiments, reference Figure 1 to Figure 3 Along the third direction, the first refrigerant inlet pipe 41 and the second refrigerant inlet pipe 43 are located on the same straight line, and the first refrigerant outlet pipe 42 and the second refrigerant outlet pipe 44 are located on the same straight line.

[0040] In some embodiments, reference Figure 1 to Figure 3 Along the first direction, the first refrigerant outlet pipe 42 and the second refrigerant outlet pipe 44 are arranged at the top of the plurality of heat exchange plates 40 , and the first refrigerant inlet pipe 41 and the second refrigerant inlet pipe 43 are arranged at the bottom of the plurality of heat exchange plates 40 .

[0041] For example, the outlet pipe of the refrigerant is arranged above the inlet pipe, and the flow direction is opposite to the flow direction of the circulating water. Such countercurrent heat exchange will make the heat exchange between the two more complete. During the heat exchange, the refrigerant changes from liquid to gas, rises according to its own gravity, and absorbs the heat of the circulating water to cool it down.

[0042] In some embodiments, reference Figure 1 to Figure 3 The feed area 3 further includes an annular water tank 31. The circulating water inlet 30 is arranged on one side of the annular water tank 31 along the third direction. The annular water tank 31 includes a hollow area 32, and a liquid distribution tray 33 is arranged at the bottom of the hollow area 32. The liquid distribution tray 33 includes a plurality of guide holes 34 arranged at intervals along the second direction and the third direction.

[0043] The heat exchange area 4 further includes a guide plate 49 , which extends along the second direction and is provided with a plurality of through holes 490 corresponding to the positions of the inter-plate channels.

[0044] Exemplarily, the circulating water flows from the water inlet to the water tank module, and then passes through the liquid distribution tray 33 at the bottom of the water tank to neatly arrange the guide holes 34 and the guide plate 49, and flows evenly through each heat exchange plate 40, forming an uninterrupted water film of uniform thickness outside the plate. After being cooled by the refrigerant in the plate, the circulating water flows out through the circulating water outlet 50.

[0045] In some embodiments, reference Figure 1 to Figure 3 The discharge area 5 further includes a water outlet filter plate 51 and a support frame 52. The water outlet filter plate 51 is disposed below the plurality of heat exchange plates 40. The support frame 52 is disposed below the housing 2.

[0046] Exemplarily, the support frame 52 is located below the housing 2 to support the components above. The water outlet filter plate 51 is disposed below the plurality of heat exchange plates 40 to buffer the falling of the circulating water.

[0047] In some embodiments, reference Figure 1 to Figure 3 The shell 2 further includes a plurality of cleaning doors 20. The plurality of cleaning doors 20 are respectively disposed on the top of the shell 2, on both sides along the second direction, and on both sides along the third direction, and are used to detachably close the hollow area 32 and the heat exchange area 4.

[0048] Exemplarily, the cleaning door 20 is installed in a detachable manner, which facilitates the maintenance and removal and replacement of the heat exchange plate 40, and the inspection and repair of the annular water tank 31 and the liquid distribution pan 33.

[0049] In some embodiments, reference Figure 1 to Figure 3 The double-channel falling film heat exchanger 1 further includes a ladder 6. The ladder 6 is arranged on the other side of the plurality of heat exchange plates 40 along the third direction.

[0050] For example, a worker may inspect and repair the double-channel falling film heat exchanger 1 by climbing the ladder 6 .

[0051] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A double-channel falling film heat exchanger, characterized in that: include: The shell extends in a first direction; the shell comprises a feed area, a heat exchange area and a discharge area arranged in sequence from top to bottom; the feed area comprises a circulating water inlet; the discharge area comprises a circulating water outlet; The heat exchange area includes a plurality of heat exchange plates; the plurality of heat exchange plates are arranged at intervals along the second direction, including inter-plate channels and intra-plate channels, and the first direction is perpendicular to the second direction; each of the heat exchange plates extends along the first direction, and is provided with the intra-plate channel inside; the circulating water inlet, the inter-plate channel and the circulating water outlet are connected to each other for circulating water to flow; The heat exchange area also includes a first refrigerant inlet pipe, a first refrigerant outlet pipe, a second refrigerant inlet pipe and a second refrigerant outlet pipe; the first refrigerant inlet pipe and the first refrigerant outlet pipe are respectively connected to the in-plate channels of a part of the heat exchange plates to form a first cooling channel; the second refrigerant inlet pipe and the second refrigerant outlet pipe are respectively connected to the in-plate channels of another part of the heat exchange plates to form a second cooling channel.

2. The double-channel falling film heat exchanger according to claim 1, characterized in that: The first refrigerant inlet pipe and the first refrigerant outlet pipe both extend along the second direction and are arranged on one side of the plurality of heat exchange plates along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the first refrigerant inlet pipe includes a plurality of first sub-tubes, the plurality of first sub-tubes are arranged corresponding to the positions of some of the heat exchange plates, and each of the first sub-tubes is connected to the corresponding flow channel; the first refrigerant outlet pipe includes a plurality of second sub-tubes, the plurality of second sub-tubes are arranged corresponding to the positions of some of the heat exchange plates, and each of the second sub-tubes is connected to the corresponding flow channel.

3. The double-channel falling film heat exchanger according to claim 2, characterized in that: The second refrigerant inlet pipe and the second refrigerant outlet pipe both extend along the second direction and are arranged on one side of the plurality of heat exchange plates along the third direction; the second refrigerant inlet pipe includes a plurality of third sub-tubes, the plurality of third sub-tubes are arranged corresponding to the positions of the other part of the heat exchange plates, and each of the third sub-tubes is connected to the corresponding flow channel; the second refrigerant outlet pipe includes a plurality of fourth sub-tubes, the plurality of fourth sub-tubes are arranged corresponding to the positions of the other part of the heat exchange plates, and each of the fourth sub-tubes is connected to the corresponding flow channel.

4. The double-channel falling film heat exchanger according to claim 3, characterized in that: Along the third direction, the first refrigerant inlet pipe and the second refrigerant inlet pipe are located on the same straight line, and the first refrigerant outlet pipe and the second refrigerant outlet pipe are located on the same straight line.

5. The double-channel falling film heat exchanger according to claim 1, characterized in that: Along the first direction, the first refrigerant outlet pipe and the second refrigerant outlet pipe are arranged at the top of the plurality of heat exchange plates, and the first refrigerant inlet pipe and the second refrigerant inlet pipe are arranged at the bottom of the plurality of heat exchange plates.

6. The double-channel falling film heat exchanger according to claim 2, characterized in that: The feed area also includes an annular water tank; the circulating water inlet is arranged on one side of the annular water tank along the third direction; the annular water tank includes a hollow area, and a liquid distribution tray is provided at the bottom of the hollow area; the liquid distribution tray includes a plurality of guide holes arranged at intervals along the second direction and the third direction.

7. The double-channel falling film heat exchanger according to claim 1, characterized in that: The heat exchange area further comprises a guide plate; the guide plate extends along the second direction and is provided with a plurality of through holes corresponding to the positions of the inter-plate channels.

8. The double-channel falling film heat exchanger according to claim 1, characterized in that: The discharge area further includes a water outlet filter plate and a support frame; the water outlet filter plate is arranged below the plurality of heat exchange plates; and the support frame is arranged below the shell.

9. The double-channel falling film heat exchanger according to claim 5, characterized in that: The shell further includes a plurality of cleaning doors, which are respectively arranged at the top of the shell, at both sides along the second direction, and at both sides along the third direction, and are used to detachably close the hollow area and the heat exchange area.

10. The double-channel falling film heat exchanger according to claim 2, characterized in that: It also includes a ladder; the ladder is arranged on the other side of the plurality of heat exchange plates along the third direction.

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