A boiling cooling system

Abstract

The application discloses a boiling type cooling system, which comprises a first heat exchanger, a bubble generating device and a second heat exchanger. The first heat exchanger comprises a first heat exchanger shell and a heat exchange plate arranged in the first heat exchanger shell. The first heat exchanger shell is provided with a second through hole. The bubble generating device is arranged below the first heat exchanger. The bubble generating device comprises a bubble generating piece and a monofilament head. The bubble generating piece is internally provided with a cavity. The upper surface of the bubble generating piece is provided with a first through hole. One end of the monofilament head is arranged in the first through hole, and the other end of the monofilament head is arranged in the second through hole. The cavity, the first through hole and the second through hole are communicated with each other. Through the arrangement of the bubble generating device, the cold cycle gas enters the bottom of the first heat exchanger through the cavity and the monofilament head, and a boiling-like environment is created for the target solution in the first heat exchanger. According to the heat transfer principle, the heat exchange coefficient can be increased, the heat exchange effect can be enhanced, the operation cost can be effectively reduced, and the safety and reliability are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial product crystallization purification, and in particular to a boiling cooling system. BACKGROUND

[0002] In the field of industrial product crystallization purification, evaporation concentration, distillation, extraction, distillation, crystallization and other methods are generally used for purification. In the crystallization operation process, the mother liquor needs to be cooled to facilitate the precipitation of crystals. A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, etc., and are widely used. Therefore, in the cooling process, heat exchangers are often used to cool the mother liquor, but how to increase the heat exchange coefficient of the heat exchanger and improve the heat exchange efficiency is still a problem to be solved. SUMMARY

[0003] To overcome the above-mentioned shortcomings, the purpose of the present application is to provide a boiling cooling system. Based on the principle of crystallization purification, a heat exchanger device is used to create a boiling heat exchange process, increase the heat exchange coefficient of the heat exchanger, and improve the heat exchange efficiency.

[0004] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a boiling cooling system, comprising:

[0005] A first heat exchanger, the first heat exchanger comprising a first heat exchanger shell and a heat exchange plate located inside the first heat exchanger shell, the first heat exchanger shell being provided with a second through hole;

[0006] A bubble generating device, the bubble generating device being arranged below the first heat exchanger, the bubble generating device comprising a bubble generating piece and a monofilament head, the bubble generating piece being provided with a cavity inside, the upper surface of the bubble generating piece being provided with a first through hole, one end of the monofilament head being arranged in the first through hole and the other end being arranged in the second through hole, the cavity, the first through hole and the second through hole being in communication with each other.

[0007] Through the arrangement of the bubble generating device, the cold circulating gas enters the bottom of the first heat exchanger through the cavity and the monofilament head, creating a boiling-like environment for the target solution inside the first heat exchanger. According to the principle of heat transfer, the heat exchange coefficient can be increased, the heat exchange effect can be enhanced, and the operation cost can be effectively reduced.

[0008] Further, the bubble generating piece is in a pipe shape, and a plurality of bubble generating pieces are arranged equidistantly and in parallel below the first heat exchanger. Through the arrangement of the plurality of bubble generating pieces, cold circulating gas enters each position below the first heat exchanger, the amount of generated bubbles is increased, the heat exchange coefficient is increased, and the heat exchange efficiency is further improved.

[0009] Further, the bubble generating piece is in a box structure, and a plurality of first through holes are arranged on the upper surface of the box in a rectangular array.

[0010] Further, the bubble generating device further comprises a check valve connected with the bubble generating piece. Through the arrangement of the check valve, the target solution is prevented from flowing back to the gas circulating system.

[0011] Further, the first heat exchanger shell is provided with a target solution inlet, a target solution outlet, a cooling medium inlet and a cooling medium outlet, the heat exchange plate is internally provided with an inner channel, one end of the inner channel is connected with the cooling medium inlet, and the other end is connected with the cooling medium outlet, and the third temperature sensor is arranged at the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet. Through the third temperature sensor, the temperature of the target solution or the cooling medium at the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet can be monitored in real time. Through real-time monitoring and control of the cooling medium flow and the cooling gas flow, the temperature of the target solution outlet reaches the design value, and a whole closed-loop feedback control is formed. The temperature of the target solution outlet can be effectively controlled, the target solution can be suspended and crystallized for purification in the first heat exchanger, and the solution temperature can be reduced for delivery to the next stage of purification equipment, so that the equipment meets various operating conditions, has a wide application range, and can greatly save energy, improve product quality and increase economic benefits.

[0012] Further, an inner thread is arranged in the first through hole, the monofilament head is inserted into the first through hole, and the first through hole and the monofilament head are connected through threads, and the second through hole and the monofilament head are in interference fit.

[0013] Further, the target solution inlet is arranged at the upper end of the first heat exchanger shell, the target solution outlet is arranged at the lower end of the first heat exchanger shell, the target solution moves from top to bottom after entering the first heat exchanger, the cooling medium inlet is arranged at the lower end of the first heat exchanger shell, the cooling medium outlet is arranged at the upper end of the first heat exchanger shell, the cooling medium moves from bottom to top after entering the inner channel of the heat exchange plate, and the target solution and the cooling medium flow in a countercurrent state.

[0014] Further, the gas circulation system further comprises a second gas pipeline, one end of the second gas pipeline is connected with the first heat exchanger, and the other end is connected with the fan.

[0015] Further, the gas circulation system further comprises a second gas pipeline, one end of the second gas pipeline is connected with the first heat exchanger, and the other end is connected with the fan. If the cold circulation gas does not need to be cooled, the cold circulation gas can be directly circulated through the second gas pipeline by the control system, without passing through the second heat exchanger, thereby reducing the system pressure drop and achieving the effect of energy saving.

[0016] Further, the gas circulation system further comprises a second gas pipeline, one end of the second gas pipeline is connected with the first heat exchanger, and the other end is connected with the fan.

[0017] The beneficial effects of the present application are:

[0018] 1) Through the setting of the bubble generating device, the gas enters the bottom of the first heat exchanger through the cavity and the monofilament head, and creates a boiling-like environment for the target solution inside the first heat exchanger.

[0019] 2) Through the setting of multiple bubble generating devices, cold circulation gas enters each position below the first heat exchanger, increasing the amount of generated bubbles and the heat transfer coefficient, thereby improving the heat exchange efficiency.

[0020] 3) Third temperature sensors are arranged at the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet. The third temperature sensors can monitor the temperature of the target solution or the cooling medium at the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet in real time. The cooling medium flow and the cooling gas flow are controlled in real time to make the temperature of the target solution outlet reach the design value, forming an overall closed-loop feedback control. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A schematic diagram of the connection of the components of the boiling cooling system according to an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the connection of the first heat exchanger and the bubble generating device according to an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the connection of the components of the gas circulation system according to an embodiment of the present application.

[0024] In the figure: 1, first heat exchanger; 11, first heat exchanger shell; 111, bottom plate; 12, heat exchange plate; 13, target solution inlet; 14, target solution outlet; 15, cooling medium inlet; 16, cooling medium outlet; 17, cooling gas outlet; 2, bubble generating device; 21, bubble generating element; 22, single filament head; 23, check valve; 3, gas circulation system; 31, second heat exchanger; 32, fan; 33, first gas pipeline; 34, second gas pipeline; 41, first temperature sensor; 42, second temperature sensor; 43, third temperature sensor; 5, flow meter; 61, first pressure gauge; 62, second pressure gauge; 7, exhaust valve. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly defined.

[0026] Referring to the accompanying drawings, Figure 1 In the embodiment, a boiling cooling system includes a first heat exchanger 1, a bubble generating device 2 and a gas circulation system 3. The bubble generating device 2 is connected to the first heat exchanger 1, and the gas circulation system 3 is connected to the bubble generating device 2. The target solution is cooled by the first heat exchanger 1. The bubble generating device 2 generates a large number of bubbles, so that the heat exchange is similar to the boiling heat exchange condition, the heat exchange coefficient is increased, and the heat exchange efficiency is improved. The gas circulation system 3 continuously generates low-temperature cooling gas. The low-temperature cooling gas generates bubbles in the target solution, and at the same time, the low-temperature cooling gas can reduce the temperature of the target solution and improve the heat exchange efficiency.

[0027] Referring to the drawings Figure 2 As shown in some embodiments, the first heat exchanger 1 comprises a first heat exchanger shell 11 and a heat exchange plate 12 inside the first heat exchanger shell 11, the heat exchange plate 12 is pillow-shaped to improve the heat exchange efficiency of the heat exchange plate 12. The heat exchange plate 12 is provided with multiple blocks, and the multiple blocks of the heat exchange plate 12 are placed vertically, leaving a gap between adjacent two heat exchange plates 12, and the distance between adjacent two heat exchange plates 12 is equal. The first heat exchanger shell 11 is provided with a target solution inlet 13, a target solution outlet 14, a cooling medium inlet 15 and a cooling medium outlet 16. The inside of the heat exchange plate 12 is provided with an inner channel, one end of the inner channel is connected with the cooling medium inlet 15, and the other end is connected with the cooling medium outlet 16. In operation, the cooling medium enters the inner channel of the heat exchange plate 12 from the cooling medium inlet 15, and then flows out from the cooling medium outlet 16 through the inner channel. The target solution with a higher temperature enters the inside of the first heat exchanger 1 from the target solution inlet 13, and the target solution with a higher temperature passes through the outer gap of the heat exchange plate 12. The cooling medium passes through the inner channel of the heat exchange plate 12. Both of them exchange heat through the side wall of the heat exchange plate 12, thereby reducing the temperature of the target solution, and outputting to the next stage equipment for low-temperature crystallization purification.

[0028] In some embodiments, the target solution inlet 13 is arranged at the upper end of the first heat exchanger shell 11, the target solution outlet 14 is arranged at the lower end of the first heat exchanger shell 11, and the target solution moves from top to bottom after entering the first heat exchanger 1. The cooling medium inlet 15 is arranged at the lower end of the first heat exchanger shell 11, and the cooling medium outlet 16 is arranged at the upper end of the first heat exchanger shell 11. After the cooling medium enters the inner channel of the heat exchange plate 12, it moves from bottom to top, and the flow of the target solution and the cooling medium is in countercurrent state. By arranging the target solution and the cooling medium in countercurrent state, the cooling efficiency of the cooling medium on the target solution can be improved. The cooling medium includes cooling air, cooling water, ice brine, liquid nitrogen, etc. The specific cooling medium is comprehensively considered according to the temperature of the target solution, the temperature required to be reduced by the target solution, the flow rate of the target solution, etc. The present application does not make any limitation.

[0029] In some embodiments, a third temperature sensor 43 is arranged at each of the target solution inlet 13, the target solution outlet 14, the cooling medium inlet 15 and the cooling medium outlet 16. The third temperature sensor 43 can monitor the temperature of the target solution or the cooling medium at the target solution inlet 13, the target solution outlet 14, the cooling medium inlet 15 and the cooling medium outlet 16 in real time.

[0030] In some embodiments, the bubble generating device 2 is arranged below the first heat exchanger 1 and detachably connected with the first heat exchanger 1. The bubble generating device 2 comprises a bubble generating piece 21 and a monofilament head 22. The bubble generating piece 21 is provided with a first through hole on the surface thereof, and the first through hole is provided with an internal thread. The monofilament head 22 is inserted into the first through hole and threadedly connected with the first through hole. The bubble generating piece 21 can be in a pipe shape. If the bubble generating piece 21 is in a pipe shape, a plurality of bubble generating pieces 21 are arranged equidistantly and in parallel below the first heat exchanger 1. By arranging a plurality of bubble generating pieces 21, cold circulating gas is introduced into each position below the first heat exchanger 1, the amount of generated bubbles is increased, the heat exchange coefficient is increased, and the heat exchange efficiency is improved.

[0031] In some embodiments, the bubble generating piece 21 can also be in a box structure. If the bubble generating piece 21 is in a box structure, the upper surface of the box is provided with a plurality of first through holes arranged in a rectangular array. The first through holes are in communication with the cavity inside the box.

[0032] In some embodiments, the bottom plate 111 of the first heat exchanger shell 11 is provided with a second through hole. The position of the second through hole is matched with the monofilament head 22. The end of the monofilament head 22 away from the bubble generating piece 21 is inserted into the second through hole. The second through hole and the monofilament head 22 are in interference fit, so that the connection between the second through hole and the monofilament head 22 does not leak gas or liquid. After the cold circulating gas enters the bubble generating piece 21, it enters the inside of the first heat exchanger 1 through the monofilament head 22. The cold circulating gas contacts the target solution in the inside of the first heat exchanger 1, a large amount of bubbles are generated in the target solution, the heat exchange is similar to the boiling heat exchange condition, the heat exchange coefficient is increased, and the heat exchange efficiency is improved. The gas circulation system 3 continuously generates low-temperature cooling gas. While generating bubbles, the low-temperature gas can reduce the temperature of the target solution.

[0033] In some embodiments, the upper end of the first heat exchanger shell 11 is further provided with a cold circulating gas outlet 17. The cold circulating gas in the gas circulation system 3 enters the bubble generating piece 21, and then enters the inside of the first heat exchanger 1. The cold circulating gas flows from bottom to top in the first heat exchanger 1, and then flows out from the cold circulating gas outlet 17 to enter the gas circulation system 3 for cooling.

[0034] In some embodiments, the bubble generating device 2 further comprises a check valve 23 connected with the bubble generating piece 21. By arranging the check valve 23, the target solution is prevented from flowing back to the gas circulation system 3.

[0035] Referring to the drawings Figure 3As shown, in some embodiments, the gas circulation system 3 comprises a second heat exchanger 31 and a fan 32, the second heat exchanger 31 and the fan 32 are connected by a first gas pipeline 33, the second heat exchanger 31 is connected with the cold circulation gas outlet 17, and the fan 32 is connected with the bubble generating device 2 through the first gas pipeline 33. The cold circulation gas flowing out of the first heat exchanger 1 enters the second heat exchanger 31 through the first gas pipeline 33, the cold circulation gas is cooled by the second heat exchanger 31, and then enters the bubble generating device 2 again through the first gas pipeline 33 under the action of the fan 32.

[0036] In some embodiments, the gas circulation system 3 further comprises a first temperature sensor 41, a flow meter 5 and a first pressure gauge 61 connected in sequence through the first gas pipeline 33, the first temperature sensor 41 is connected with the bubble generating device 2, and the first pressure gauge 61 is connected with the fan 32. By setting the first temperature sensor 41, the flow meter 5 and the first pressure gauge 61, the temperature, flow and pressure of the cold circulation gas entering the first heat exchanger 1 are monitored. A second pressure gauge 62, a second temperature sensor 42 and an exhaust valve 7 are arranged between the cold circulation gas outlet 17 and the second heat exchanger 31, and the second pressure gauge 62, the second temperature sensor 42 and the exhaust valve 7 are connected in sequence through the first gas pipeline 33. By setting the second pressure gauge 62, the second temperature sensor 42 and the exhaust valve 7, the temperature and pressure of the cold circulation gas flowing out of the first heat exchanger 1 are monitored in real time, and part of the cold circulation gas is discharged through the exhaust valve 7 when necessary. By monitoring and controlling the flow of the cooling medium and the flow of the cooling gas in real time, the temperature of the target solution outlet 14 reaches the designed value, forming an overall closed-loop feedback control. The temperature of the target solution outlet 14 can be effectively controlled, so that the target solution can be suspended and crystallized in the first heat exchanger 1 for purification, or the solution temperature can be reduced for delivery to the next stage of purification equipment, so that the equipment can meet various operating conditions, has a wide range of applications, and can greatly save energy, improve product quality and increase economic benefits.

[0037] In some embodiments, the second heat exchanger 31 further comprises a circulating water inlet and a circulating water outlet, and the second heat exchanger 31 cools the cold circulation gas by circulating water.

[0038] In some embodiments, a second gas pipeline 34 is also provided, one end of which is connected to the cold circulation gas outlet 17 and the other end of which is connected to the fan 32. If the cold circulation gas does not need to be cooled, the cold circulation gas can be directly circulated through the second gas pipeline 34 by the control system, without passing through the second heat exchanger 31, so as to reduce the system pressure drop and achieve the effect of energy saving. The present application has the advantages of accurately controlling the temperature of the target solution, improving the heat exchange efficiency, saving the operation cost and increasing the economic benefits under the condition of safe production.

[0039] Working process: The cooling medium enters the inner channel of the heat exchange plate 12 from the cooling medium inlet 15, and then flows out from the cooling medium outlet 16 through the inner channel. The target solution at a high temperature enters the first heat exchanger 1 from the target solution inlet 13, and the target solution at a high temperature passes through the outer gap of the heat exchange plate 12, and the cooling medium passes through the inner channel of the heat exchange plate 12, both of which exchange heat through the heat exchange plate wall, so as to reduce the temperature of the target solution and output to the next stage equipment for low-temperature crystallization purification.

[0040] At the same time, the cold circulation gas is continuously generated by the gas circulation system 3, and after the cold circulation gas enters the bubble generator 21, it enters the first heat exchanger 1 through the monofilament head 22, and the cold circulation gas contacts the target solution in the first heat exchanger 1, so that a large number of bubbles are generated in the target solution, so that the heat exchange is similar to the boiling heat exchange condition, the heat exchange coefficient is increased, and the heat exchange efficiency is improved.

[0041] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose of which is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A boiling-type cooling system, characterized in that, include: The first heat exchanger (1) includes a first heat exchanger housing (11) and a heat exchange plate (12) located inside the first heat exchanger housing (11). A second through hole is provided on the first heat exchanger housing (11). A bubble generating device (2) is disposed below the first heat exchanger (1). The bubble generating device (2) includes a bubble generating element (21) and a monofilament head (22). The bubble generating element (21) has a cavity inside. The upper surface of the bubble generating element (21) has a first through hole. One end of the monofilament head (22) is disposed in the first through hole, and the other end is disposed in the second through hole. The cavity, the first through hole and the second through hole are interconnected. The gas circulation system (3) includes a first gas pipeline (33), a second heat exchanger (31), a fan (32), and a second gas pipeline (34). The second heat exchanger (31) and the fan (32) are connected through the first gas pipeline (33). The second heat exchanger (31) is connected to the first heat exchanger (1). The fan (32) is connected to the bubble generator (2) through the first gas pipeline (33). One end of the second gas pipeline (34) is connected to the first heat exchanger (1), and the other end is connected to the fan (32).

2. The boiling cooling system according to claim 1, characterized in that, The bubble generator (21) is in the shape of a pipe, and multiple bubble generators (21) are provided. Multiple bubble generators (21) are arranged parallel to each other at equal distances below the first heat exchanger (1).

3. The boiling cooling system according to claim 1, characterized in that, The bubble generator is a box structure, and the upper surface of the box is provided with a plurality of first through holes, which are arranged in a rectangular array.

4. A boiling cooling system according to any one of claims 1-3, characterized in that, The bubble generating device (2) also includes a check valve (23), which is connected to the bubble generating element (21).

5. The boiling cooling system according to claim 1, characterized in that, The first heat exchanger housing (11) is provided with a target solution inlet (13), a target solution outlet (14), a cooling medium inlet (15), and a cooling medium outlet (16). The heat exchange plate (12) is provided with an internal channel. One end of the internal channel is connected to the cooling medium inlet (15), and the other end is connected to the cooling medium outlet (16). A third temperature sensor (43) is provided at each of the target solution inlet (13), the target solution outlet (14), the cooling medium inlet (15), and the cooling medium outlet (16).

6. The boiling cooling system according to claim 1, characterized in that, The first through hole is provided with an internal thread, the single thread head (22) is inserted into the first through hole and threadedly connected to the first through hole, and the second through hole and the single thread head (22) are interference fit.

7. A boiling cooling system according to claim 5, characterized in that, The target solution inlet (13) is located at the upper end of the first heat exchanger housing (11), and the target solution outlet (14) is located at the lower end of the first heat exchanger housing (11); the cooling medium inlet (15) is located at the lower end of the first heat exchanger housing (11), and the cooling medium outlet (16) is located at the upper end of the first heat exchanger housing (11).

8. The boiling cooling system according to claim 1, characterized in that, The gas circulation system (3) further includes a first temperature sensor (41), a flow meter (5) and a first pressure gauge (61) connected through a first gas pipe (33). The first temperature sensor (41) is connected to the bubble generator (2), and the first pressure gauge (61) is connected to the fan (32). A second pressure gauge (62), a second temperature sensor (42) and an exhaust valve (7) are arranged between the first heat exchanger (1) and the second heat exchanger (31) and are connected in sequence through the first gas pipe (33).

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