Evaporation heat exchanger of vertical coil pipe

Abstract

The utility model relates to the technical field of heat exchange equipment, and discloses a vertical coil evaporation heat exchanger which comprises a shell pass assembly, a tube pass assembly, a flow guide assembly and a spraying assembly, the shell pass assembly comprises a vertically-arranged outer shell, a mounting opening is formed in the top of the outer shell, the tube pass assembly comprises in-line heat exchange tubes, and the in-line heat exchange tubes are communicated with the flow guide assembly. The in-line type heat exchange pipe is inserted into the outer shell through the installation opening, the spraying assembly comprises a spraying pipe, the spraying pipe spirally surrounds the outer side of the in-line type heat exchange pipe, a plurality of spraying openings are formed in the side, close to the in-line type heat exchange pipe, of the spraying pipe, the top of the outer shell is covered with the flow guiding assembly, and the flow guiding assembly is arranged in the outer shell. An air inlet is formed in the position, close to the bottom, of the side wall of the outer shell, and the flow guide assembly is used for guiding flowing of air in the outer shell and external air. The effect of improving the heat exchange efficiency of the heat exchanger is achieved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange equipment, and in particular to a vertical coil evaporative heat exchanger. Background Art

[0002] Heat exchangers are indispensable equipment for heat exchange and transfer in industrial production processes. They are widely used in industrial production. The most widely used heat transfer equipment in industrial sectors such as petroleum, chemical, power, metallurgy, and energy is the shell-and-tube heat exchanger. In recent years, the heat exchanger industry has made remarkable achievements in energy saving and efficiency improvement, improving heat transfer efficiency, reducing heat transfer area, reducing pressure drop, and improving thermal strength of devices. As industrial devices transform towards large-scale and complex directions, heat exchangers are gradually moving towards large-scale, high-efficiency, and energy-saving.

[0003] At present, a Chinese utility model patent with announcement number CN205174936U discloses a vertical evaporative condenser, including a condenser shell, a heat exchanger is arranged in the middle part of the condenser shell, the heat exchanger includes a plurality of vertically parallel heat exchange plates, a cooling gap is arranged between adjacent heat exchange plates, a heat exchange filler is arranged in each cooling gap, a plurality of parallel fluid channels are arranged in the heat exchange plate, all the fluid channels are connected in sequence to form a square wave channel, an upper header is arranged at the upper end of the heat exchanger, a lower header is arranged at the lower end of the heat exchanger, a water distribution pipe is arranged at the upper end of the heat exchanger in the condenser shell, a plurality of nozzles are evenly arranged on the lower side of the water distribution pipe, an exhaust fan is arranged on the top of the condenser shell, and an air inlet grille is arranged on the side of the lower end of the condenser shell.

[0004] With respect to the above-mentioned related technologies, the inventors believe that when the heat exchange tubes are sprayed with water distribution pipes arranged at the upper end of the heat exchanger, the spray water is unevenly distributed on the heat exchange tubes, resulting in a problem of low heat exchange efficiency. Utility Model Content

[0005] In order to improve the heat exchange efficiency of the heat exchanger, the present application provides an evaporative heat exchanger with a vertical coil.

[0006] The present application provides a vertical coil evaporative heat exchanger, which adopts the following technical solution:

[0007] A vertical coil evaporative heat exchanger comprises a shell-side component, a tube-side component, a flow guide component and a spray component, wherein the shell-side component comprises a vertically arranged outer shell, a mounting port is provided on the top of the outer shell, the tube-side component comprises an in-line heat exchange tube, the in-line heat exchange tube is inserted into the outer shell through the mounting port, the spray component comprises a spray pipe, the spray pipe is spirally wrapped around the outside of the in-line heat exchange tube, a side of the spray pipe close to the in-line heat exchange tube is provided with a plurality of spray ports, the flow guide component cover is arranged on the top of the outer shell, an air inlet is provided on the side wall of the outer shell near the bottom, and the flow guide component is used to guide the flow of air inside the outer shell and outside air.

[0008] By adopting the above technical scheme, cooling water is sprayed onto the surface of the heat exchange tube through the spray port to form a water film covering the surface of the heat exchange tube. Under the action of the fan, the air contacts the water film on the surface of the heat exchange tube from the bottom airflow of the heat exchanger, and takes away the evaporated water vapor. The spray pipe is spirally wrapped around the outside of the in-line heat exchange tube, and the spray port is opened on the side of the spray pipe close to the in-line heat exchange tube. The cooling water is sprayed from the horizontal direction, so that the water film formed on the surface of the heat exchange tube is more uniform, the heat exchange between the cooling water and the heat exchange tube is more sufficient, and the heat exchange efficiency of the heat exchanger is improved.

[0009] Optionally, the tube-side assembly includes a tube sheet, and a first step portion for supporting the tube sheet is provided on the inner wall of the outer shell, the first step portion includes a first horizontally arranged supporting surface, and the lower end surface of the tube sheet abuts against the first supporting surface.

[0010] By adopting the above technical solution, a first step portion for supporting the tube sheet is provided on the inner wall of the outer shell, and the lower end surface of the tube sheet abuts against the first supporting surface. The first step portion is utilized to limit the movement of the tube sheet in the vertical direction, so that the tube side assembly is assembled with the outer shell under the action of gravity, thereby reducing the use of fasteners such as bolts and improving the convenience of shell side cleaning.

[0011] Optionally, the tube-side assembly also includes a baffle for supporting the heat exchange tube, and a second step portion for supporting the baffle is provided on the inner wall of the outer shell, and the second step portion includes a horizontally arranged second supporting surface, and the lower end surface of the baffle abuts against the second supporting surface.

[0012] By adopting the above technical solution, a second step portion for supporting the baffle is provided on the inner wall of the outer shell, and the lower end surface of the baffle abuts against the second supporting surface. The second step portion is utilized in cooperation with the first step portion to support the tube-side assembly, thereby improving the stability of the connection between the tube-side assembly and the shell-side assembly.

[0013] Optionally, the plurality of spray ports are arranged at equal intervals along the length direction of the spray pipe.

[0014] Optionally, the air guide assembly includes an air guide cover and an axial flow fan, the air guide cover is sleeved on the upper end of the outer shell, the outer shell is partially inserted into the air guide cover, a gas channel is formed between the outer wall of the outer shell and the inner wall of the air guide cover, the outer shell is provided with an air outlet, the air outlet is connected to the gas channel, a water baffle is provided between the outer wall of the outer shell and the inner wall of the air guide cover, the water baffle is used to separate the gas channel, the air guide cover is provided with an exhaust port, the exhaust port is located on the side of the water baffle away from the air outlet, the axial flow fan is connected to the air guide cover, and the axial flow fan is located on the side of the water baffle away from the air outlet.

[0015] By adopting the above technical solution, the air deflector is sleeved on the upper end of the outer shell, and a gas channel is formed between the outer wall of the outer shell and the inner wall of the air deflector. The gas channel is separated by a water baffle, and the moisture in the air is retained on the side of the water baffle close to the air outlet, thereby improving the service life of the fan.

[0016] Optionally, a water storage chamber is opened at the lower end of the outer shell, and the spray assembly includes a circulating water pump, the water inlet end of the circulating water pump is connected to the water storage chamber, and the water outlet end of the circulating water pump is connected to the spray pipe.

[0017] By adopting the above technical solution, a water storage chamber is set at the lower end of the outer shell, and the water liquefied by steam cooling is collected in the water storage chamber. The circulating water pump pumps the water collected in the water storage chamber into the spray pipe for reuse.

[0018] Optionally, a dust screen is provided on the outer shell, and the dust screen is used to close the air inlet.

[0019] By adopting the above technical solution, a dust screen is arranged on the outer shell, and the air inlet is sealed by the dust screen, thereby reducing the possibility of foreign matter such as dust entering the inner part of the outer shell through the air inlet, thereby reducing the possibility of affecting the heat exchange efficiency of the heat exchanger.

[0020] Optionally, there are multiple spray pipes, and the multiple spray pipes are coiled in sequence along the vertical direction on the outside of the heat exchange tube. The water outlet end of the circulating water pump is connected to a water distributor, and the multiple spray pipes are all connected to the water distributor.

[0021] By adopting the above technical solution, multiple spray pipes are coiled in sequence along the vertical direction on the outside of the heat exchange tube, and the multiple spray pipes are connected to the circulating water pump through the water distributor. The medium temperature at different positions in the heat exchange tube is different. The water distributor is used to distribute the flow rate of cooling water supplied to the spray pipe according to the position of the spray pipe, thereby improving the utilization rate of cooling water.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By spirally wrapping the spray pipe around the outside of the in-line heat exchange tube, the spray port is opened on the side of the spray pipe close to the in-line heat exchange tube, and the cooling water is sprayed out from the horizontal direction, so that the water film formed on the surface of the heat exchange tube is more uniform, the heat exchange between the cooling water and the heat exchange tube is more sufficient, and the heat exchange efficiency of the heat exchanger is improved;

[0024] 2. By providing a first step portion for supporting the tube sheet on the inner wall of the outer shell, the lower end surface of the tube sheet abuts against the first supporting surface, and the first step portion is used to limit the movement of the tube sheet in the vertical direction, so that the tube side assembly is assembled with the outer shell under the action of gravity, reducing the use of fasteners such as bolts, and improving the convenience of shell side cleaning;

[0025] 3. By setting a dust screen on the outer shell and using the dust screen to seal the air inlet, the possibility of dust and other foreign matter entering the outer shell through the air inlet is reduced, thereby reducing the possibility of affecting the heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 It is a structural diagram of the pipe component part in the embodiment of the present application;

[0029] Figure 3 yes Figure 2 A magnified view of part A;

[0030] Figure 4 yes Figure 2 Enlarged view of part B.

[0031] Figure numerals: 100, shell-side assembly; 110, outer shell; 111, air inlet; 112, air outlet; 113, first step portion; 114, second step portion; 115, water storage chamber; 200, tube-side assembly; 210, in-line heat exchange tube; 220, tube sheet; 230, baffle; 300, guide assembly; 310, guide cover; 311, exhaust port; 400, spray assembly; 410, spray pipe; 420, circulating water pump. DETAILED DESCRIPTION

[0032] In order to more clearly explain the overall concept of this application, the following Figure 1-4 This application is described in further detail.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0034] The present application embodiment discloses a vertical coil evaporative heat exchanger. Figure 1 and Figure 2 A vertical coil evaporative heat exchanger includes a shell-side component 100, a tube-side component 200, a guide component 300 and a spray component 400. The shell-side component 100 includes a vertically arranged outer shell 110, and a mounting port is opened on the top of the outer shell 110. The tube-side component 200 includes an in-line heat exchange tube 210, and the in-line heat exchange tube 210 is inserted into the outer shell 110 through the mounting port. The spray component 400 includes a spray pipe 410, and the spray pipe 410 is spirally wound around the outer side of the in-line heat exchange tube 210. A plurality of spray ports are opened on a side of the spray pipe 410 close to the in-line heat exchange tube 210. The guide component 300 is covered on the top of the outer shell 110, and an air inlet 111 is opened on the side wall of the outer shell 110 near the bottom. The guide component 300 is used to guide the flow of air inside the outer shell 110 and the external air.

[0035] When the medium to be cooled flows into the heat exchange tube, cooling water is sprayed onto the surface of the heat exchange tube through the spray port, forming a water film covering the surface of the heat exchange tube. Under the action of the fan, the air contacts the water film on the surface of the heat exchange tube from the bottom airflow of the heat exchanger, and takes away the evaporated water vapor. The spray pipe 410 is spirally wrapped around the outside of the in-line heat exchange tube 210, and the spray port is opened on the side of the spray pipe 410 close to the in-line heat exchange tube 210. The cooling water is sprayed from the horizontal direction, so that the water film formed on the surface of the heat exchange tube is more uniform, the heat exchange between the cooling water and the heat exchange tube is more sufficient, and the heat exchange efficiency of the heat exchanger is improved.

[0036] Reference Figure 1 and Figure 2 A plurality of spray ports are arranged at equal intervals along the length direction of the spray pipe 410 , and a nozzle is fixedly connected to the spray pipe 410 , and the nozzle is communicated with the spray port.

[0037] Reference Figure 2 and Figure 3 The tube-side assembly 200 includes a tube sheet 220. A first step portion 113 for supporting the tube sheet 220 is provided on the inner wall of the outer shell 110. The first step portion 113 includes a first horizontally arranged supporting surface, and the lower end surface of the tube sheet 220 abuts against the first supporting surface.

[0038] By providing a first step portion 113 for supporting the tube sheet 220 on the inner wall of the outer shell 110, the lower end surface of the tube sheet 220 abuts against the first supporting surface, and the first step portion 113 is used to limit the vertical movement of the tube sheet 220, so that the tube side assembly 200 is assembled with the outer shell 110 under the action of gravity, reducing the use of fasteners such as bolts, and improving the convenience of shell side cleaning.

[0039] Reference Figure 2 and Figure 4 The tube-side assembly 200 also includes a baffle 230 for supporting the heat exchange tube. A second step portion 114 for supporting the baffle 230 is provided on the inner wall of the outer shell 110. The second step portion 114 includes a horizontally arranged second supporting surface, and the lower end surface of the baffle 230 abuts against the second supporting surface.

[0040] By providing a second step portion 114 for supporting the baffle 230 on the inner wall of the outer shell 110, the lower end surface of the baffle 230 abuts against the second supporting surface, and the second step portion 114 is used in cooperation with the first step portion 113 to support the tube-side component 200, thereby improving the stability of the connection between the tube-side component 200 and the shell-side component 100.

[0041] Reference Figure 1 and Figure 2 The air guide assembly 300 includes an air guide cover 310 and an axial flow fan. The air guide cover 310 is sleeved on the upper end of the outer shell 110. The outer shell 110 is partially inserted into the air guide cover 310. A gas channel is formed between the outer wall of the outer shell 110 and the inner wall of the air guide cover 310. An air outlet 112 is provided on the outer shell 110. The air outlet 112 is connected to the gas channel. A water baffle is provided between the outer wall of the outer shell 110 and the inner wall of the air guide cover 310. The water baffle is used to separate the gas channel. An exhaust port 311 is provided on the air guide cover 310. The exhaust port 311 is located on the side of the water baffle away from the air outlet 112. The axial flow fan is connected to the air guide cover 310, and the axial flow fan is located on the side of the water baffle away from the air outlet 112.

[0042] By sleeved the air deflector 310 on the upper end of the outer shell 110, a gas channel is formed between the outer wall of the outer shell 110 and the inner wall of the air deflector 310, and the gas channel is separated by a water baffle, so that the moisture in the air is retained on the side of the water baffle close to the air outlet 112, thereby improving the service life of the fan.

[0043] Reference Figure 2 A water storage chamber 115 is opened at the lower end of the outer shell 110, and the spray assembly 400 includes a circulating water pump 420, the water inlet end of the circulating water pump 420 is connected to the water storage chamber 115, and the water outlet end of the circulating water pump 420 is connected to the spray pipe 410.

[0044] A water storage chamber 115 is provided at the lower end of the outer shell 110, and the water liquefied by steam cooling is collected by the water storage chamber 115. The circulating water pump 420 pumps the water collected in the water storage chamber 115 into the spray pipe 410 for reuse.

[0045] The outer shell 110 is provided with a dust screen, which is used to close the air inlet 111. By providing the dust screen on the outer shell 110 and closing the air inlet 111 with the dust screen, the possibility of foreign matter such as dust entering the inner part of the outer shell 110 through the air inlet 111 is reduced, thereby reducing the possibility of affecting the heat exchange efficiency of the heat exchanger.

[0046] In a preferred embodiment, a plurality of spray pipes 410 are provided, and the plurality of spray pipes 410 are vertically coiled in sequence on the outside of the heat exchange tube, and the water outlet of the circulating water pump 420 is connected to a water distributor, and the plurality of spray pipes 410 are all connected to the water distributor.

[0047] By winding a plurality of spray pipes 410 in sequence along the vertical direction on the outside of the heat exchange tube, the plurality of spray pipes 410 are connected to the circulating water pump 420 through a water distributor. The medium temperature at different positions in the heat exchange tube is different. The flow rate of cooling water supplied to the spray pipe 410 is distributed according to the position of the spray pipe 410 by using the water distributor, thereby improving the utilization rate of the cooling water.

[0048] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vertical coil evaporative heat exchanger, characterized in that: The invention comprises a shell-side component, a tube-side component, a flow guide component and a spray component. The shell-side component comprises a vertically arranged outer shell, a mounting port is provided on the top of the outer shell, the tube-side component comprises an in-line heat exchange tube, the in-line heat exchange tube is inserted into the outer shell through the mounting port, the spray component comprises a spray pipe, the spray pipe is spirally wound around the outer side of the in-line heat exchange tube, a side of the spray pipe close to the in-line heat exchange tube is provided with a plurality of spray ports, the flow guide component cover is arranged on the top of the outer shell, an air inlet is provided on the side wall of the outer shell near the bottom, and the flow guide component is used for guiding the flow of air inside the outer shell and external air.

2. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: The tube-pass assembly includes a tube sheet, and a first step portion for supporting the tube sheet is arranged on the inner wall of the outer shell, the first step portion includes a first horizontally arranged supporting surface, and the lower end surface of the tube sheet abuts against the first supporting surface.

3. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: The tube-side assembly also includes a baffle for supporting the heat exchange tube. A second step portion for supporting the baffle is provided on the inner wall of the outer shell. The second step portion includes a horizontally arranged second supporting surface. The lower end surface of the baffle abuts against the second supporting surface.

4. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: The plurality of spray ports are arranged at equal intervals along the length direction of the spray pipe.

5. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: The air guide assembly includes an air guide cover and an axial flow fan. The air guide cover is sleeved on the upper end of the outer shell, and the outer shell is partially inserted into the air guide cover. A gas channel is formed between the outer wall of the outer shell and the inner wall of the air guide cover. The outer shell is provided with an air outlet, and the air outlet is connected to the gas channel. A water baffle is provided between the outer wall of the outer shell and the inner wall of the air guide cover, and the water baffle is used to separate the gas channel. The air guide cover is provided with an exhaust port, and the exhaust port is located on the side of the water baffle away from the air outlet. The axial flow fan is connected to the air guide cover, and the axial flow fan is located on the side of the water baffle away from the air outlet.

6. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: A water storage chamber is provided at the lower end of the outer shell, and the spray assembly comprises a circulating water pump, a water inlet end of the circulating water pump is communicated with the water storage chamber, and a water outlet end of the circulating water pump is communicated with the spray pipe.

7. The vertical coil evaporative heat exchanger according to claim 1, characterized in that: The outer shell is provided with a dust screen, and the dust screen is used to close the air inlet.

8. The vertical coil evaporative heat exchanger according to claim 6, characterized in that: There are multiple spray pipes, which are coiled in sequence on the outside of the heat exchange tube in the vertical direction. The water outlet of the circulating water pump is connected to a water distributor, and the multiple spray pipes are all connected to the water distributor.

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