Recycling device for dissolved acetylene in acetylene production wastewater

Abstract

The utility model belongs to the technical field of recovery devices, and particularly relates to a device for recycling acetylene dissolved in acetylene production wastewater, which comprises a first-stage vacuum tank, a second-stage vacuum tank and a third-stage vacuum tank, and liquid inlet pipes are arranged on the left sides of the first-stage vacuum tank, the second-stage vacuum tank and the third-stage vacuum tank. The right sides of the first-stage vacuum tank, the second-stage vacuum tank and the third-stage vacuum tank are all provided with liquid outlet pipes, the tops of the first-stage vacuum tank, the second-stage vacuum tank and the third-stage vacuum tank are all connected with vacuum pumps, the exhaust ends of the vacuum pumps are connected with output pipes, one ends of the output pipes are connected with a refrigeration condensing device, and the bottom of the refrigeration condensing device is connected with a separation pipe. According to the device, the condensation effect of the condensation device on gas separated from waste water is improved, the separation effect between water vapor and other condensable gas in the gas and acetylene gas is improved, and therefore the purity of acetylene recovery is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of recovery devices, and particularly relates to a device for recovering and utilizing dissolved acetylene in acetylene production wastewater. Background Art

[0002] Acetylene is an organic compound with the chemical formula C2H2, commonly known as wind coal or calcium carbide gas. It is the smallest member of the alkyne compound family. It is a colorless gas under normal temperature and pressure, slightly soluble in water, soluble in ethanol, acetone, chloroform, benzene, and miscible in ether. It is one of the important raw materials for organic synthesis. The wastewater generated during its production contains some acetylene components dissolved in the wastewater. If these acetylene components are not recovered, it is likely to pollute the environment, pose a safety hazard, and cause a certain amount of resource waste. Currently, the vacuum recovery method is often used to recover the dissolved acetylene in these wastewaters. According to Henry's law, the acetylene in the wastewater is desorbed from the wastewater. Subsequently, the gas containing acetylene components discharged from the vacuum tank is condensed, and the condensable gases such as water vapor in the gas are separated from acetylene to obtain acetylene with a higher purity. However, in the prior art, the condensation efficiency of the condensation structure of such recovery devices is relatively low, which affects the purity of acetylene recovery. Summary of the Utility Model

[0003] Aiming at the above problems, the purpose of the present utility model is to provide a device for recovering and utilizing dissolved acetylene in acetylene production wastewater, which can improve the condensation effect of the condensation device on the gas separated from the wastewater, enhance the separation effect between the water vapor and other condensable gases in the gas and acetylene gas, and thus improve the purity of acetylene recovery.

[0004] To achieve the above purpose, the present utility model provides the following technical solution: A device for recovering and utilizing dissolved acetylene in acetylene production wastewater includes a first-stage vacuum tank, a second-stage vacuum tank, and a third-stage vacuum tank. Liquid inlet pipes are provided on the left sides of the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank. Liquid outlet pipes are provided on the right sides of the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank. Vacuum pumps are connected to the tops of the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank. The exhaust ends of the vacuum pumps are connected to an output pipe. One end of the output pipe is connected to a refrigeration condensation device. The bottom of the refrigeration condensation device is connected to a separation pipe. An acetylene gas discharge pipe is connected to the side of the separation pipe. The bottom of the separation pipe is connected to a wastewater discharge pipe. The bottom of the wastewater discharge pipe is connected to a wastewater tank. The side of the drain pipe is connected.

[0005] The beneficial effects of the present utility model are as follows: Through the operation of the water pump, the cooling water in the cooling water tank is pumped into the cooling water sealing cover through the water inlet pipe, and the cooling water in the cooling water sealing cover flows into the cooling water tank through the water outlet pipe. Through the circulating cooling water, heat exchange is carried out on the gas in the confluence bin, so that the water vapor and other condensable gases contained in the gas are condensed and separated from the acetylene gas. A semiconductor refrigerator is provided on the side of the cooling water tank, which can refrigerate the cooling water in the cooling water tank to help the cooling water maintain a low temperature. The heat sink also plays a role in increasing the heat exchange area between the cooling water tank and the air, improving the cooling efficiency of the cooling water. Through the low-temperature cooling water that circulates between the cooling water tank and the cooling water sealing cover and can maintain a low temperature, the condensation effect of the condensation device on the gas separated from the wastewater can be improved, the separation effect between the water vapor and other condensable gases in the gas and the acetylene gas can be improved, and thus the purity of acetylene recovery can be improved;

[0006] Due to the setting of the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank, after the wastewater in the first-stage vacuum tank is treated to a certain extent, the control valve connecting the first-stage vacuum tank and the second-stage vacuum tank is opened, and the wastewater in the first-stage vacuum tank is discharged into the second-stage vacuum tank. Subsequently, new wastewater is input into the first-stage vacuum tank and treated. The second-stage vacuum tank starts to perform secondary treatment on the wastewater input from the first-stage vacuum tank. After this stage of treatment is completed, the wastewater in the second-stage vacuum tank is discharged into the third-stage vacuum tank for the third treatment. The wastewater in the first-stage vacuum tank is discharged into the second-stage vacuum tank for secondary treatment, and new wastewater is injected into the first-stage vacuum tank and treated. Then, after this stage of treatment is completed, the wastewater in the third-stage vacuum tank is discharged, the wastewater in the second-stage vacuum tank enters the third-stage vacuum tank, the wastewater in the first-stage vacuum tank enters the second-stage vacuum tank, and new wastewater is injected into the first-stage vacuum tank and treated. In this way, a batch of wastewater can go through three treatment processes, improving the separation effect of acetylene from the wastewater. By the method of treating the wastewater simultaneously with three groups of vacuum tanks, a certain amount of treatment time can also be saved.

[0007] For the wastewater in the vacuum tank at a high position to be discharged to the wastewater at a low position:

[0008] As a further improvement of the above technical solution: Control valves are connected between one end of the liquid inlet pipe of the first-stage vacuum tank, between the liquid outlet pipe of the first-stage vacuum tank and the liquid inlet pipe of the second-stage vacuum tank, and between the liquid outlet pipe of the second-stage vacuum tank and the liquid inlet pipe of the third-stage vacuum tank.

[0009] The beneficial effect of this improvement is that the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank are connected through the liquid inlet pipe, the liquid outlet pipe, and the control valve, so that the wastewater in the vacuum tank at a high position can be discharged to the wastewater at a low position.

[0010] To support the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank:

[0011] As a further improvement of the above technical solution: Fixed brackets are fixedly installed on the outer sides of the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank.

[0012] The beneficial effect of this improvement is that the bottom of the fixed bracket is placed on the ground for supporting the first-stage vacuum tank, the second-stage vacuum tank, and the third-stage vacuum tank.

[0013] To separate condensable gases such as acetylene gas and water vapor:

[0014] As a further improvement of the above technical solution: The refrigeration and condensation device includes a shunt bin connected to the output pipe. The bottom of the shunt bin is connected to a spiral condensation pipe. The bottom of the spiral condensation pipe is connected to a confluence bin. A cooling water seal cover is provided between the shunt bin and the confluence bin.

[0015] The beneficial effect of this improvement is that the acetylene component dissolved in the wastewater is separated from the wastewater and input into the output pipe. This part of the gas continues to flow and enters the shunt bin in the refrigeration and condensation device, is shunted into each spiral condensation pipe through the shunt bin, and then flows into the confluence bin through the spiral condensation pipe. During this process, the cooling water in the cooling water seal cover is in full contact with the spiral condensation pipe to condense the gas in the spiral condensation pipe, realizing the separation of condensable gases such as acetylene gas and water vapor.

[0016] To improve the purity of acetylene recovery:

[0017] As a further improvement of the above technical solution: The side of the cooling water seal cover is connected with a water inlet pipe and a water outlet pipe. One end of the water inlet pipe is connected to a water pump. A cooling water tank is connected between the water outlet pipe and the water pump. A semiconductor refrigerator is provided on the side of the cooling water tank. A heat sink is also provided on the side of the cooling water tank. The bottom of the confluence bin is connected to a separation pipe.

[0018] The beneficial effects of this improvement are as follows: When the water pump operates, the cooling water in the cooling water tank is pumped into the cooling water seal cover through the water inlet pipe, and the cooling water in the cooling water seal cover flows into the cooling water tank through the water outlet pipe. Through the circulating cooling water, heat exchange is carried out on the gas in the confluence chamber, so that the water vapor and other condensable gases contained in the gas are condensed and separated from the acetylene gas. A semiconductor refrigerator is provided on the side of the cooling water tank, and the semiconductor refrigerator can refrigerate the cooling water in the cooling water tank to help the cooling water maintain a low temperature. The heat sink also plays a role in increasing the heat exchange area between the cooling water tank and the air, improving the cooling efficiency of the cooling water. Through the low-temperature cooling water that circulates between the cooling water tank and the cooling water seal cover and can maintain a low temperature, the condensation effect of the condensation device on the gas separated from the wastewater can be improved, and the separation effect between the water vapor and other condensable gases in the gas and the acetylene gas can be improved, thereby improving the purity of acetylene recovery.

[0019] Parts not involved in this device are the same as the prior art or can be implemented using the prior art. Brief Description of the Drawings

[0020] Figure 1 It is an axonometric structure schematic diagram of the front right of the present utility model;

[0021] Figure 2 It is a connection combination schematic diagram of the vacuum tank in the present utility model;

[0022] Figure 3 It is an axonometric sectional schematic diagram of the refrigeration and condensation device in the present utility model;

[0023] Figure 4 It is a partial side sectional view schematic diagram of the refrigeration and condensation device in the present utility model;

[0024] Figure 5 It is a front view partial structure schematic diagram of the refrigeration and condensation device in the present utility model;

[0025] In the figure: 1. First-stage vacuum tank; 2. Second-stage vacuum tank; 3. Third-stage vacuum tank; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Control valve; 7. Vacuum pump; 8. Output pipe; 9. Refrigeration and condensation device; 10. Shunt chamber; 11. Spiral condensation pipe; 12. Confluence chamber; 13. Cooling water seal cover; 14. Water inlet pipe; 15. Water outlet pipe; 16. Water pump; 17. Cooling water tank; 18. Semiconductor refrigerator; 19. Heat sink; 20. Separation pipe; 21. Acetylene gas discharge pipe; 22. Wastewater discharge pipe; 23. Wastewater tank; 24. Drain pipe. Detailed Implementation Modes

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0027] As Figures 1-5 shown, a device for recycling dissolved acetylene in acetylene production wastewater includes a first-stage vacuum tank 1, a second-stage vacuum tank 2, and a third-stage vacuum tank 3. Liquid inlet pipes 4 are provided on the left sides of the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3. Liquid outlet pipes 5 are provided on the right sides of the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3. Vacuum pumps 7 are connected to the tops of the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3. The exhaust ends of the vacuum pumps 7 are connected to an output pipe 8. One end of the output pipe 8 is connected to a refrigeration and condensation device 9. The bottom of the refrigeration and condensation device 9 is connected to a separation pipe 20. An acetylene gas discharge pipe 21 is connected to the side of the separation pipe 20. The bottom of the separation pipe 20 is connected to a wastewater discharge pipe 22. The bottom of the wastewater discharge pipe 22 is connected to a wastewater tank 23. The side of the drain pipe 24 is connected to 25.

[0028] In this device, the water pump 16 operates to pump the cooling water in the cooling water tank 17 into the cooling water sealing cover 13 through the water inlet pipe 14, and the cooling water in the cooling water sealing cover 13 flows into the cooling water tank 17 through the water outlet pipe 15. Through the circulating cooling water, heat exchange is carried out on the gas in the confluence chamber 12, so that the water vapor and other condensable gases contained in the gas are condensed and separated from the acetylene gas. A semiconductor refrigerator 18 is provided on the side of the cooling water tank 17. The semiconductor refrigerator 18 can refrigerate the cooling water in the cooling water tank 17 to help the cooling water maintain a low temperature. The heat sink 19 also plays a role in increasing the heat exchange area between the cooling water tank 17 and the air, improving the cooling efficiency of the cooling water. Through the low-temperature cooling water that circulates between the cooling water tank 17 and the cooling water sealing cover 13 and can maintain a low temperature, the condensation effect of the condensation device on the gas separated from the wastewater can be improved, the separation effect between the water vapor and other condensable gases and the acetylene gas in the gas can be improved, and thus the purity of acetylene recovery can be improved;

[0029] Due to the setting of the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3, after the wastewater in the first-stage vacuum tank 1 is treated to a certain extent, the control valve 6 connecting the first-stage vacuum tank 1 and the second-stage vacuum tank 2 is opened, and the wastewater in the first-stage vacuum tank 1 is discharged into the second-stage vacuum tank 2. Subsequently, new wastewater is input into the first-stage vacuum tank 1 for treatment, while the second-stage vacuum tank 2 starts to perform secondary treatment on the wastewater input from the first-stage vacuum tank 1. After completing this stage of treatment, the wastewater in the second-stage vacuum tank 2 is discharged into the third-stage vacuum tank 3 for the third treatment. The wastewater in the first-stage vacuum tank 1 is discharged into the second-stage vacuum tank 2 for secondary treatment, and new wastewater is injected into the first-stage vacuum tank 1 and treated. Then, after completing this stage of treatment, the wastewater in the third-stage vacuum tank 3 is discharged, the wastewater in the second-stage vacuum tank 2 enters the third-stage vacuum tank 3, the wastewater in the first-stage vacuum tank 1 enters the second-stage vacuum tank 2, and new wastewater is injected into the first-stage vacuum tank 1 and treated. In this way, a batch of wastewater can undergo three treatment processes, improving the effect of separating acetylene from the wastewater. By using the method of treating wastewater simultaneously with three groups of vacuum tanks, a certain amount of treatment time can also be saved.

[0030] One end of the liquid inlet pipe 4 of the first-stage vacuum tank 1, between the liquid outlet pipe 5 of the first-stage vacuum tank 1 and the liquid inlet pipe 4 of the second-stage vacuum tank 2, and between the liquid outlet pipe 5 of the second-stage vacuum tank 2 and the liquid inlet pipe 4 of the third-stage vacuum tank 3 are all connected with control valves 6.

[0031] The first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3 are connected through the liquid inlet pipe 4, the liquid outlet pipe 5, and the control valve 6, so that the wastewater in the vacuum tank at a higher position can be discharged to the wastewater at a lower position.

[0032] Fixed brackets are fixedly installed on the outer sides of the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3.

[0033] The bottom of the fixed bracket is placed on the ground and is used to support the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3.

[0034] The refrigeration and condensation device 9 includes a shunt bin 10 connected to the output pipe 8. The bottom of the shunt bin 10 is connected to a spiral condensation pipe 11. The bottom of the spiral condensation pipe 11 is connected to a confluence bin 12. A cooling water seal cover 13 is provided between the shunt bin 10 and the confluence bin 12.

[0035] The dissolved acetylene component in the wastewater is separated from the wastewater and fed into the output pipe 8. This part of the gas continues to flow and enters the shunt bin 10 in the refrigeration and condensation device 9, and is shunted into each spiral condensation pipe 11 through the shunt bin 10. Subsequently, it flows into the confluence bin 12 through the spiral condensation pipe 11. During this process, the cooling water in the cooling water seal 13 is in full contact with the spiral condensation pipe 11 to condense the gas in the spiral condensation pipe 11, realizing the separation of condensable gases such as acetylene gas and water vapor.

[0036] A water inlet pipe 14 and a water outlet pipe 15 are connected to the side of the cooling water seal 13. One end of the water inlet pipe 14 is connected to a water pump 16. A cooling water tank 17 is connected between the water outlet pipe 15 and the water pump 16. A semiconductor refrigerator 18 is provided on the side of the cooling water tank 17. A heat sink 19 is also provided on the side of the cooling water tank 17. The bottom of the confluence bin 12 is connected to a separation pipe 20.

[0037] The water pump 16 operates to pump the cooling water in the cooling water tank 17 into the cooling water seal 13 through the water inlet pipe 14, and the cooling water in the cooling water seal 13 flows into the cooling water tank 17 through the water outlet pipe 15. Through the circulating cooling water, heat exchange is carried out on the gas in the confluence bin 12, so that the water vapor and other condensable gases contained in the gas are condensed and separated from the acetylene gas. A semiconductor refrigerator 18 is provided on the side of the cooling water tank 17, and the semiconductor refrigerator 18 can refrigerate the cooling water in the cooling water tank 17 to help the cooling water maintain a low temperature. The heat sink 19 also plays a role in increasing the heat exchange area between the cooling water tank 17 and the air, improving the cooling efficiency of the cooling water. By circulating the low-temperature cooling water that can maintain a low temperature between the cooling water tank 17 and the cooling water seal 13, the condensation effect of the condensation device on the gas separated from the wastewater can be improved, the separation effect between the water vapor and other condensable gases in the gas and the acetylene gas can be improved, and thus the purity of acetylene recovery can be improved.

[0038] Working principle and usage process of the utility model: When this device is in use, the control valve 6 on the liquid inlet pipe 4 of the first-stage vacuum tank 1 is connected to the wastewater input pipeline. When recovering acetylene, first, open the control valve 6 on the liquid inlet pipe 4 of the first-stage vacuum tank 1 to input wastewater into the first-stage vacuum tank 1. Then, use the vacuum pump 7 to evacuate the inside of the first-stage vacuum tank 1, reducing the internal pressure of the first-stage vacuum tank 1, so that the dissolved acetylene component in the wastewater is separated from the wastewater and input into the output pipe 8. This part of the gas continues to flow and enters the shunt chamber 10 in the refrigeration and condensation device 9, and is shunted into each spiral condensation pipe 11 through the shunt chamber 10, and then flows into the confluence chamber 12 through the spiral condensation pipe 11. During this process, the water pump 16 operates to pump the cooling water in the cooling water tank 17 into the cooling water seal cover 13 through the water inlet pipe 14, and the cooling water in the cooling water seal cover 13 flows into the cooling water tank 17 through the water outlet pipe 15. Through the circulating cooling water, heat exchange is carried out on the gas in the confluence chamber 12, so that the water vapor and other condensable gases contained in the gas are condensed and separated from the acetylene gas. A semiconductor refrigerator 18 is provided on the side of the cooling water tank 17, and the semiconductor refrigerator 18 can refrigerate the cooling water in the cooling water tank 17 to help the cooling water maintain a low temperature. The heat sink 19 also plays a role in increasing the heat exchange area between the cooling water tank 17 and the air, improving the cooling efficiency of the cooling water. Through the low-temperature cooling water that circulates between the cooling water tank 17 and the cooling water seal cover 13 and can maintain a low temperature, the condensation effect of the condensation device on the gas separated from the wastewater can be improved, the separation effect between the water vapor and other condensable gases and the acetylene gas in the gas can be improved, and thus the purity of acetylene recovery can be improved. The separated acetylene gas is discharged through the acetylene gas discharge pipe 21 into the acetylene collection tank, and the liquid generated by condensation enters the wastewater tank 23 for accumulation and is discharged through the drain pipe 24. Since the first-stage vacuum tank 1, the second-stage vacuum tank 2, and the third-stage vacuum tank 3 are provided, after the wastewater in the first-stage vacuum tank 1 is treated to a certain extent, open the control valve 6 connecting the first-stage vacuum tank 1 and the second-stage vacuum tank 2 to discharge the wastewater in the first-stage vacuum tank 1 into the second-stage vacuum tank 2. Then, input new wastewater into the first-stage vacuum tank 1 and conduct treatment. The second-stage vacuum tank 2 starts to conduct secondary treatment on the wastewater input from the first-stage vacuum tank 1. After completing this stage of treatment, the wastewater in the second-stage vacuum tank 2 is discharged into the third-stage vacuum tank 3 for third treatment. The wastewater in the first-stage vacuum tank 1 is discharged into the second-stage vacuum tank 2 for secondary treatment, and new wastewater is injected into the first-stage vacuum tank 1 and treatment is carried out. Then, after completing this stage of treatment, the wastewater in the third-stage vacuum tank 3 is discharged, the wastewater in the second-stage vacuum tank 2 enters the third-stage vacuum tank 3, the wastewater in the first-stage vacuum tank 1 enters the second-stage vacuum tank 2, and new wastewater is injected into the first-stage vacuum tank 1 and treatment is carried out. In this way, the cycle is repeated, enabling a batch of wastewater to undergo three treatment processes, improving the effect of separating acetylene from the wastewater.The method of treating wastewater simultaneously through three groups of vacuum tanks can also save a certain amount of treatment time.

[0039] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, article or device.

[0040] In this article, specific examples are used to illustrate the principle and implementation mode of the present utility model. The description of the above examples is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation mode of the present utility model. It should be pointed out that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate way; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, shall all be regarded as the protection scope of the present utility model.

Claims

1. A device for recycling dissolved acetylene in the wastewater from acetylene production, characterized in that: It includes a first-stage vacuum tank (1), a second-stage vacuum tank (2), and a third-stage vacuum tank (3). Liquid inlet pipes (4) are provided on the left sides of the first-stage vacuum tank (1), the second-stage vacuum tank (2), and the third-stage vacuum tank (3). Liquid outlet pipes (5) are provided on the right sides of the first-stage vacuum tank (1), the second-stage vacuum tank (2), and the third-stage vacuum tank (3). Vacuum pumps (7) are connected to the tops of the first-stage vacuum tank (1), the second-stage vacuum tank (2), and the third-stage vacuum tank (3). The exhaust ends of the vacuum pumps (7) are connected to an output pipe (8). One end of the output pipe (8) is connected to a refrigeration and condensation device (9). The bottom of the refrigeration and condensation device (9) is connected to a separation pipe (20). An acetylene gas discharge pipe (21) is connected to the side of the separation pipe (20). The bottom of the separation pipe (20) is connected to a wastewater discharge pipe (22). The bottom of the wastewater discharge pipe (22) is connected to a wastewater tank (23). The side of the drain pipe (24) is connected to (25).

2. The recovery and utilization device for dissolved acetylene in the acetylene production wastewater according to claim 1, wherein: Control valves (6) are connected between one end of the liquid inlet pipe (4) of the first-stage vacuum tank (1), between the liquid outlet pipe (5) of the first-stage vacuum tank (1) and the liquid inlet pipe (4) of the second-stage vacuum tank (2), and between the liquid outlet pipe (5) of the second-stage vacuum tank (2) and the liquid inlet pipe (4) of the third-stage vacuum tank (3).

3. The recycling device for dissolved acetylene in the acetylene production wastewater according to claim 1, wherein: Fixed brackets are fixedly installed on the outsides of the first-stage vacuum tank (1), the second-stage vacuum tank (2), and the third-stage vacuum tank (3).

4. The recycling device for dissolved acetylene in the acetylene production wastewater according to claim 1, wherein: The refrigeration and condensation device (9) includes a shunt chamber (10) connected to the output pipe (8). The bottom of the shunt chamber (10) is connected to a spiral condensation pipe (11). The bottom of the spiral condensation pipe (11) is connected to a confluence chamber (12). A cooling water seal cover (13) is provided between the shunt chamber (10) and the confluence chamber (12).

5. The recovery and utilization device for dissolved acetylene in acetylene production wastewater according to claim 4, characterized in that: An inlet water pipe (14) and an outlet water pipe (15) are connected to the side of the cooling water seal cover (13). One end of the inlet water pipe (14) is connected to a water pump (16). A cooling water tank (17) is connected between the outlet water pipe (15) and the water pump (16). A semiconductor refrigeration device (18) is provided on the side of the cooling water tank (17). A heat sink (19) is also provided on the side of the cooling water tank (17). The bottom of the confluence chamber (12) is connected to the separation pipe (20).

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