CN115435620A - Boiling type cooling system - Google Patents

Abstract

The invention discloses a boiling type cooling system, which comprises: the first heat exchanger comprises a first heat exchanger shell and a heat exchange plate positioned in the first heat exchanger shell, and a second through hole is formed in the first heat exchanger shell; bubble generating device, bubble generating device set up in the below of first heat exchanger, and bubble generating device includes that the bubble takes place piece and monofilament, and the bubble takes place the inside cavity that is provided with of piece, and the upper surface that the bubble takes place the piece is provided with first through-hole, and monofilament first end sets up in first through-hole, and the other end setting is in the second through-hole, and cavity, first through-hole and second through-hole are linked together each other. Through the arrangement of the bubble generating device, cold circulating gas enters the bottom of the first heat exchanger through the cavity and the single-filament head, a boiling-like environment is created for a target solution in the first heat exchanger, the heat exchange coefficient can be increased, the heat exchange effect is enhanced, and the operation cost is safely, reliably and effectively reduced.

Description

Boiling type cooling system

Technical Field

The invention relates to the field of industrial product crystallization and purification, in particular to a boiling type cooling system.

Background

In the field of crystallization and purification of industrial products, methods such as evaporation concentration, distillation, extraction, distillation, crystallization and the like are generally adopted for purification, and in the crystallization operation process, the mother liquor needs to be cooled so as to be beneficial to crystal precipitation. The heat exchanger is a device for transferring partial heat of hot fluid to cold fluid, also called as heat exchanger, and plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, and the heat exchanger can be used as a heater, a cooler, a condenser, an evaporator and the like in chemical industry production, and has wide application. Therefore, in the process of cooling, the heat exchanger is often used for cooling the mother liquor, but how to increase the heat exchange coefficient of the heat exchanger and improve the heat exchange efficiency still remains the problem to be solved at present.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a boiling type cooling system, which adopts heat exchanger equipment on the basis of the principle of crystallization and purification, increases the heat exchange coefficient of a heat exchanger through a boiling-like heat exchange process, and improves the heat exchange efficiency.

In order to achieve the above purposes, the invention adopts the technical scheme that: a boil-off cooling system, comprising:

the first heat exchanger comprises a first heat exchanger shell and a heat exchange plate positioned inside the first heat exchanger shell, and a second through hole is formed in the first heat exchanger shell;

bubble generating device, bubble generating device sets up the below of first heat exchanger, bubble generating device includes bubble generation spare and monofilament head, the inside cavity that is provided with of bubble generation spare, the upper surface of bubble generation spare is provided with first through-hole, monofilament head one end sets up in the first through-hole, the other end sets up in the second through-hole, cavity, first through-hole and the second through-hole is linked together each other.

Through the arrangement of the bubble generating device, cold circulating gas enters the bottom of the first heat exchanger through the cavity and the single-filament head, a boiling-like environment is created for a target solution in the first heat exchanger, the heat exchange coefficient can be increased, the heat exchange effect is enhanced, and the operation cost is safely, reliably and effectively reduced.

Further, the bubble generating pieces are in a pipeline shape, the bubble generating pieces are arranged in a plurality of numbers, and the bubble generating pieces are arranged below the first heat exchanger in parallel at equal intervals. Through the setting of a plurality of bubble emergence pieces, make each position of first heat exchanger below all have cold cycle gas to get into, increase the volume of gassing, increase heat transfer coefficient, and then improve heat exchange efficiency.

Furthermore, the bubble generating piece is of a box structure, a plurality of first through holes are formed in the upper surface of the box, and the first through holes are arranged in a rectangular array.

Further, the bubble generating device further comprises a check valve, the check valve is connected with the bubble generating piece, and the target solution is prevented from flowing back to the gas circulation system through the check valve.

Furthermore, a target solution inlet, a target solution outlet, a cooling medium inlet and a cooling medium outlet are arranged on the first heat exchanger shell, an inner channel is arranged inside the heat exchange plate, one end of the inner channel is connected with the cooling medium inlet, the other end of the inner channel is connected with the cooling medium outlet, and third temperature sensors are arranged at the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet. 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 may be monitored in real time by the third temperature sensor. The flow of the cooling medium and the flow of the cooling gas are monitored and controlled in real time, so that the outlet temperature of the target solution reaches a design value, and integral closed-loop feedback control is formed. The temperature of the target solution outlet can be effectively controlled, the target solution can be purified by suspension crystallization in the first heat exchanger, the temperature of the solution can be reduced, and the solution is conveyed to next-stage purification equipment, so that the equipment can meet the operation of various working conditions, the application range is wide, multiple cooling effects are cooperatively controlled, the energy can be greatly saved, the product quality is improved, and the economic benefit is increased.

Furthermore, an internal thread is arranged in the first through hole, the single-wire head is inserted into the first through hole and is in threaded connection with the first through hole, and the second through hole is in interference fit with the single-wire head.

Furthermore, 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, and 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, and the cooling medium moves from bottom to top after entering the inner channel of the heat exchange plate and flows in a counter-current state with the target solution.

Further, the bubble generating device comprises a gas circulation system, wherein the gas circulation system comprises a first gas pipeline, a second heat exchanger and a fan, the second heat exchanger is connected with the fan through the first gas pipeline, the second heat exchanger is connected with the first heat exchanger, and the fan is connected with the bubble generating device through the first gas pipeline.

Furthermore, the gas circulation system also comprises a second gas pipeline, one end of the second gas pipeline is connected with the first heat exchanger, and the other end of the second gas pipeline is connected with the fan. If the cold circulating gas does not need to be cooled, the cold circulating gas can be directly circulated through the second gas pipeline through the control system without a second heat exchanger, so that the pressure drop of the system is reduced, and the energy-saving effect is achieved. The system realizes accurate control of the temperature of the target solution under the condition of safely finishing production, improves the heat exchange efficiency, can save the operation cost and increase the economic benefit.

Further, gas circulation system still includes first temperature sensor, flowmeter and the first manometer of connecting through first gas piping, first temperature sensor with bubble generating device connects, first manometer and the fan is connected, through the setting of first temperature sensor, flowmeter and first manometer, implements the control and will get into the temperature, flow and the pressure of the cold circulation gas in the first heat exchanger. And a second pressure gauge, a second temperature sensor and an exhaust valve which are sequentially connected through a first gas pipeline are arranged between the first heat exchanger and the second heat exchanger. Through the setting of second manometer, second temperature sensor and discharge valve, the temperature and the pressure of the cold cycle gas that flow out from in the first heat exchanger are monitored in real time, and partial cold cycle gas is got rid of through the discharge valve when necessary. The flow of the cooling medium and the flow of the cooling gas are monitored and controlled in real time, so that the outlet temperature of the target solution reaches a design value, and integral closed-loop feedback control is formed.

The invention has the beneficial effects that:

1) Through the arrangement of the bubble generating device, gas enters the bottom of the first heat exchanger through the cavity and the single-filament head, a boiling-like environment is created for a target solution in the first heat exchanger, the heat exchange coefficient can be increased, the heat exchange effect is enhanced, and the operation cost is safely, reliably and effectively reduced.

2) Through the setting of a plurality of bubble emergence pieces, make each position in first heat exchanger below all have the gaseous entering of cold cycle, increase the volume that produces the bubble, increase heat transfer coefficient, and then improve heat exchange efficiency.

3) Third temperature sensors are arranged through the target solution inlet, the target solution outlet, the cooling medium inlet and the cooling medium outlet. 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 by the third temperature sensor. The flow of the cooling medium and the flow of the cooling gas are monitored and controlled in real time, so that the outlet temperature of the target solution reaches a design value, and integral closed-loop feedback control is formed.

Drawings

FIG. 1 is a schematic diagram illustrating the connection of components of a boiling type temperature reduction system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first heat exchanger and a bubble generating device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection of the components of the gas circulation system according to an embodiment of the present invention.

In the figure: 1. a first heat exchanger; 11. a first heat exchanger housing; 111. a base plate; 12. a heat exchanging plate; 13. a target solution inlet; 14. a target solution outlet; 15. a cooling medium inlet; 16. a cooling medium outlet; 17. a cold cycle gas outlet; 2. a bubble generating device; 21. a bubble generating member; 22. single-thread ends; 23. a check valve; 3. a gas circulation system; 31. a second heat exchanger; 32. a fan; 33. a first gas conduit; 34. a second gas conduit; 41. a first temperature sensor; 42. a second temperature sensor; 43. a third temperature sensor; 5. a flow meter; 61. a first pressure gauge; 62. a second pressure gauge; 7. and (4) exhausting the valve.

Detailed Description

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

Referring to the attached drawing 1, the boiling type cooling system in the embodiment includes a first heat exchanger 1, a bubble generating device 2 and a gas circulating system 3, the bubble generating device 2 is connected with the first heat exchanger 1, the gas circulating system 3 is respectively connected with the bubble generating device 2, a target solution is cooled by the first heat exchanger 1, the bubble generating device 2 generates a large amount of bubbles, so that the heat exchange condition is similar to that of boiling, the heat exchange coefficient is increased, and the heat exchange efficiency is improved. The gas circulation system 3 continuously generates low-temperature cooling gas, and the low-temperature cooling gas can reduce the temperature of the target solution and improve the heat exchange efficiency when the low-temperature cooling gas generates bubbles to the target solution.

Referring to fig. 2, in some embodiments, 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, and the heat exchange plate 12 is pillow-shaped to improve the heat exchange efficiency of the heat exchange plate 12. The heat exchange plates 12 are vertically arranged, a gap is reserved between every two adjacent heat exchange plates 12, the distance between every two adjacent 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, an inner channel is arranged inside each heat exchange plate 12, one end of the inner channel is connected with the cooling medium inlet 15, and the other end of the inner channel is connected with the cooling medium outlet 16. In operation, cooling medium enters the internal channels of the heat exchanging plate 12 from the cooling medium inlet 15 and then exits from the cooling medium outlet 16 through the internal channels. The target solution with higher temperature enters the inside of the first heat exchanger 1 from the target solution inlet 13, the target solution with higher temperature passes through the external gap of the heat exchanging plate 12, the cooling medium passes through the internal channel of the heat exchanging plate 12, and the two exchange heat through the side wall of the heat exchanging plate 12, so that the temperature of the target solution is reduced, and the target solution is output to the next stage of equipment for low-temperature crystallization purification.

In some embodiments, the target solution inlet 13 is disposed at the upper end of the first heat exchanger housing 11, the target solution outlet 14 is disposed at the lower end of the first heat exchanger housing 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, the cooling medium outlet 16 is arranged at the upper end of the first heat exchanger shell 11, the cooling medium enters the inner channel of the heat exchange plate 12 and then moves from bottom to top, the cooling medium and the target solution flow in a counter-flow state, and the target solution and the cooling medium are arranged in a counter-flow manner, so that the cooling efficiency of the cooling medium on the target solution can be improved. The cooling medium includes cooling air, cooling water, brine ice, liquid nitrogen, etc., and 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., without limitation.

In some embodiments, the third temperature sensors 43 are disposed at the target solution inlet 13, the target solution outlet 14, the cooling medium inlet 15, and the cooling medium outlet 16, and the temperatures 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 may be monitored in real time by the third temperature sensors 43.

In some embodiments, the bubble generating means 2 is arranged below the first heat exchanger 1 and is detachably connected to the first heat exchanger 1. The bubble generating device 2 comprises a bubble generating piece 21 and a monofilament head 22, wherein a first through hole is formed in the surface of the bubble generating piece 21, an internal thread is arranged in the first through hole, and the monofilament head 22 is inserted into the first through hole and is in threaded connection with the first through hole. The bubble generating member 21 may have a pipe shape, and if the bubble generating member 21 has a pipe shape, a plurality of bubble generating members 21 are provided, and the plurality of bubble generating members 21 are provided in parallel at equal intervals below the first heat exchanger 1. Through the setting of a plurality of bubble generation pieces 21, make each position of first heat exchanger 1 below all have cold cycle gas to get into, increase the volume that produces the bubble, increase heat transfer coefficient, and then improve heat exchange efficiency.

In some embodiments, the bubble generating member 21 may also be a box structure, and if the bubble generating member 21 is a box structure, a plurality of first through holes are disposed on an upper surface of the box, the first through holes are arranged in a rectangular array, and the first through holes are communicated with a cavity inside the box.

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 that of the filament head 22, one end of the filament head 22 far away from the bubble generating member 21 is inserted into the second through hole, and the second through hole and the filament head 22 are in interference fit, so that the joint of the second through hole and the filament head 22 cannot leak gas or liquid. After cold circulation gas enters the bubble generating piece 21, the cold circulation gas enters the first heat exchanger 1 through the single-screw head 22, the cold circulation gas contacts with the target solution in the first heat exchanger 1, the target solution generates a large amount of bubbles, the heat exchange reaches the similar 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, and the low-temperature cooling gas can reduce the temperature of the target solution while generating bubbles.

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

In some embodiments, the bubble generating device 2 further comprises a check valve 23, the check valve 23 is connected to the bubble generating member 21, and the check valve 23 prevents the target solution from flowing back to the gas circulation system 3.

Referring to fig. 3, 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 pipe 33, the second heat exchanger 31 and the cold circulation gas outlet 17 are connected, and the fan 32 is connected with the bubble generation device 2 by a first gas pipe 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, is cooled by the second heat exchanger 31, and then enters the bubble generation device 2 through the first gas pipeline 33 again under the action of the fan 32.

In some embodiments, the gas circulation system 3 further includes a first temperature sensor 41, a flow meter 5 and a first pressure gauge 61 sequentially connected through the first gas pipeline 33, the first temperature sensor 41 is connected to the bubble generation device 2, the first pressure gauge 61 is connected to the blower 32, and the monitoring of the temperature, the flow rate and the pressure of the cold circulation gas to enter the first heat exchanger 1 is performed through the arrangement of the first temperature sensor 41, the flow meter 5 and the first pressure gauge 61. 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, the second pressure gauge 62, the second temperature sensor 42 and the exhaust valve 7 are connected sequentially through a first gas pipeline 33, the temperature and the pressure of the cold circulation gas flowing out of the first heat exchanger 1 are monitored in real time through the arrangement of the second pressure gauge 62, the second temperature sensor 42 and the exhaust valve 7, and part of the cold circulation gas is discharged through the exhaust valve 7 when necessary. The flow rate of the cooling medium and the flow rate of the cooling gas are monitored and controlled in real time, so that the temperature of the target solution outlet 14 reaches a design value, and integral closed-loop feedback control is formed. The temperature of the target solution outlet 14 can be effectively controlled, the target solution can be purified by suspension crystallization in the first heat exchanger 1, the temperature of the solution can be reduced and the solution can be conveyed to next-stage purification equipment, so that the equipment can meet the operation requirements of various working conditions, the application range is wide, and the multiple cooling effects are cooperatively controlled, so that the energy can be greatly saved, the product quality is improved, and the economic benefit is increased.

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 circulating gas through the circulating water.

In some embodiments, a second gas conduit 34 is further included, the second gas conduit 34 being connected at one end to the cold cycle gas outlet 17 and at the other end to the fan 32. If the cold circulating gas does not need to be cooled, the cold circulating gas can be directly circulated through the second gas pipeline 34 through the control system without passing through the second heat exchanger 31, so that the pressure drop of the system is reduced, and the energy-saving effect is achieved. The invention has the advantages of realizing the accurate control of the temperature of the target solution under the condition of safely finishing the production, improving the heat exchange efficiency, saving the operation cost and increasing the economic benefit.

The working process is as follows: the cooling medium enters the inner channel of the heat exchanging 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 higher temperature enters the inside of the first heat exchanger 1 from the target solution inlet 13, the target solution with higher temperature passes through the external gap of the heat exchange plate 12, the cooling medium passes through the internal channel of the heat exchange plate 12, and the two exchange heat through the heat exchange plate wall, so that the temperature of the target solution is reduced, and the target solution is output to the next stage of equipment for low-temperature crystallization purification.

Meanwhile, cold circulating gas is continuously generated through the gas circulating system 3, after the cold circulating gas enters the bubble generating piece 21, the cold circulating gas enters the first heat exchanger 1 through the single-screw head 22, and the cold circulating gas is contacted with the target solution in the first heat exchanger 1, so that the target solution generates a large amount of bubbles, the heat exchange reaches the boiling-like heat exchange condition, the heat exchange coefficient is increased, and the heat exchange efficiency is improved.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A boil-off cooling system, comprising:

the heat exchanger comprises a first heat exchanger (1), wherein the first heat exchanger (1) comprises a first heat exchanger shell (11) and a heat exchange plate (12) positioned inside the first heat exchanger shell (11), and a second through hole is formed in the first heat exchanger shell (11);

bubble generating device (2), bubble generating device (2) set up the below of first heat exchanger (1), bubble generating device (2) are including bubble generation piece (21) and monofilament head (22), bubble generation piece (21) inside is provided with the cavity, the upper surface of bubble generation piece (21) is provided with first through-hole, monofilament head (22) one end sets up in the first through-hole, the other end sets up in the second through-hole, cavity, first through-hole and the second through-hole is linked together each other.

2. The boiling cooling system according to claim 1, wherein the bubble generating member (21) is in a shape of a pipe, the bubble generating member (21) is provided in plurality, and the plurality of bubble generating members (21) are arranged in parallel at equal intervals below the first heat exchanger (1).

3. The boiling cooling system of claim 1, wherein the bubble generating member is a box structure, and a plurality of first through holes are disposed on an upper surface of the box structure, and the first through holes are arranged in a rectangular array.

4. A boiling cooling system according to any one of claims 1-3, wherein the bubble generating means (2) further comprises a non-return valve (23), the non-return valve (23) being connected to the bubble generating member (21).

5. The boiling type temperature reduction system according to claim 1, wherein a target solution inlet (13), a target solution outlet (14), a cooling medium inlet (15) and a cooling medium outlet (16) are arranged on the first heat exchanger shell (11), an inner channel is arranged inside the heat exchanger plate (12), one end of the inner channel is connected with the cooling medium inlet (15), the other end of the inner channel is connected with the cooling medium outlet (16), and third temperature sensors (43) are arranged at 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 of claim 1, wherein the first through hole is internally threaded, the filament head (22) is inserted into the first through hole and is in threaded connection with the first through hole, and the second through hole is in interference fit with the filament head (22).

7. Boiling cooling system according to claim 5, wherein the target solution inlet (13) is arranged at an upper end of the first heat exchanger housing (11) and the target solution outlet (14) is arranged at a lower end of the first heat exchanger housing (11); the cooling medium inlet (15) is arranged at a lower end of the first heat exchanger housing (11), and the cooling medium outlet (16) is arranged at an upper end of the first heat exchanger housing (11).

8. A boiling cooling system according to claim 1, further comprising a gas circulation system (3), wherein the gas circulation system (3) comprises a first gas pipe (33), a second heat exchanger (31) and a fan (32), the second heat exchanger (31) and the fan (32) are connected through the first gas pipe (33), the second heat exchanger (31) and the first heat exchanger (1) are connected, and the fan (32) is connected through the first gas pipe (33) and the bubble generating device (2).

9. Boiling cooling system according to claim 8, wherein the gas circulation system (3) further comprises a second gas pipe (34), one end of the second gas pipe (34) is connected to the first heat exchanger (1), and the other end is connected to the fan (32).

10. The boiling type cooling system according to claim 9, wherein the gas circulation system (3) further comprises a first temperature sensor (41), a flow meter (5) and a first pressure gauge (61) which are connected through a first gas pipeline (33), the first temperature sensor (41) is connected with the bubble generation device (2), the first pressure gauge (61) is connected with the fan (32), and a second pressure gauge (62), a second temperature sensor (44) and an exhaust valve (7) which are sequentially connected through the first gas pipeline (33) are arranged between the first heat exchanger (1) and the second heat exchanger (31).

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