An apparatus for separating dichloromonofluoromethane and trifluoromethane

Abstract

The utility model discloses a kind of separating dichloromonofluoromethane and trifluoromethane's separating device, it is related to refrigeration equipment technical field, main purpose is to provide a kind of separating dichloromonofluoromethane and trifluoromethane's separating device, which can separate the mixed gas of dichloromonofluoromethane and trifluoromethane.The utility model provides a kind of separating dichloromonofluoromethane and trifluoromethane's separating device, by controlling the temperature of first storage tank, the mixed solution of dichloromonofluoromethane and trifluoromethane is layered, then increase first separating tank, trifluoromethane is passed into first separating tank, then dichloromonofluoromethane is transported to second storage tank, to reach the technical effect of separating dichloromonofluoromethane and trifluoromethane.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a separation device for separating dichlorofluoromethane and trifluoromethane. Background Technology

[0002] Refrigerants are indispensable in chemical production processes. Their primary function is to cool materials. Commonly used refrigerants in chemical plants include -35°C brine, R22, R23, and R1150. Different processes require different temperatures, thus necessitating the selection of different refrigerants. R22 (dichlorofluoromethane) is generally used in areas around -40°C, R23 (trifluoromethane) in areas around -70°C, and R1150 (ethylene) in areas around -100°C. The use of refrigerants in chemical plants must be carefully considered. A heat exchanger is used, which consists of a tube layer and a shell layer. The material flows through the tube layer, and the coolant flows through the shell layer. The high-temperature material comes into contact with the coolant through the tubes. The coolant absorbs heat and vaporizes, releasing a large amount of cold energy, thus lowering the temperature of the material to achieve the desired effect. During the heat exchange process, the temperature difference changes significantly, which can easily cause stress in the heat exchanger. After prolonged use, the welds between the heat exchanger tube sheet and the tubes are prone to leakage. If the heat exchanger leaks, the refrigerant will be contaminated. When trifluoromethane and dichlorofluoromethane are mixed and miscible, the unit may fail to operate normally due to high exhaust pressure.

[0003] Because trifluoromethane and dichlorofluoromethane are miscible, the current method for handling a mixture of trifluoromethane and dichlorofluoromethane is to shut down the equipment, treat it using a non-condensable evacuation device, vent it into the air, repair the heat exchanger by welding, refill it with trifluoromethane and dichlorofluoromethane, and continue operating the equipment. However, this method not only damages the outer atmosphere but also greatly increases the consumption of trifluoromethane and dichlorofluoromethane, thereby increasing the operating costs of enterprises. Utility Model Content

[0004] In view of this, the present invention provides a separation device for separating dichlorofluoromethane and trifluoromethane. The main purpose is to provide a separation device capable of separating a mixture of dichlorofluoromethane and trifluoromethane.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model provides a separation device for separating dichlorofluoromethane and trifluoromethane, the device comprising:

[0007] A heat exchange component includes a first storage tank, a second storage tank, a first cascade evaporator, a compressor, a heat exchanger, and multiple evaporation components. The second storage tank is connected to the upper part of the first cascade evaporator. The first storage tank is connected to one end of the tube side of the heat exchanger. The other end of the tube side of the heat exchanger is connected to one end of the multiple evaporation components. A first reflux pipe is provided between one end of the shell side of the heat exchanger and the compressor. The other end of the shell side of the heat exchanger is connected to the other end of the evaporation components. The compressor is connected to the first cascade evaporator. A second liquid inlet pipe is provided between the first storage tank and the lower part of the first cascade evaporator. A second exhaust pipe is provided at the upper part of the second storage tank.

[0008] The separation component includes a first separation tank, a first feed pipe, a first discharge pipe, and a first recovery pipe. One end of the first feed pipe is connected to the first storage tank, and the other end is connected to the first separation tank. One end of the first discharge pipe is connected to the first return pipe, and the other end is connected to the first separation tank. One end of the first recovery pipe is connected to the second storage tank, and the other end is connected to the first storage tank.

[0009] Furthermore, a first mixing pipe is provided on the first storage tank for introducing mixed gas into the first storage tank.

[0010] Furthermore, the separation component also includes a first pressure detector, which is installed on the first storage tank and is used to detect the pressure inside the first storage tank.

[0011] Furthermore, the separation component includes a second cascade evaporator, a third storage tank, a fourth storage tank, a second feed pipe, a second discharge pipe, and a second recovery pipe. The fourth storage tank is connected to the upper part of the second cascade evaporator. One end of the second feed pipe is connected to the third storage tank, and the other end is connected to one end of the tube side of the second cascade evaporator. One end of the second discharge pipe is connected to the middle of the tube side of the second cascade evaporator, and the other end is connected to the first reflux pipe. One end of the second recovery pipe is connected to the third storage tank, and the other end is connected to the fourth storage tank.

[0012] Furthermore, a second mixing pipe is provided on the third storage tank for introducing mixed gas into the third storage tank.

[0013] Furthermore, the separation component also includes a first pressure detector, which is disposed on the third storage tank and is used to detect the pressure inside the third storage tank.

[0014] Furthermore, the regulating valve includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve, and a sixth valve. The first valve and the third valve are disposed on the first feed pipe, the second valve and the fourth valve are disposed on the first discharge pipe, and the fifth valve and the sixth valve are disposed on the first recovery pipe.

[0015] On the other hand, this utility model embodiment also provides a method for separating dichlorofluoromethane and trifluoromethane, the method comprising the following steps:

[0016] A mixture of dichlorofluoromethane and trifluoromethane is introduced into the first storage tank, and the temperature inside the first storage tank is controlled within the range of -20°C to -40°C. The mixture is left to stand for 12 to 24 hours until the dichlorofluoromethane and trifluoromethane separate into layers.

[0017] Slowly open the first feed pipe, and the trifluoromethane in the upper layer enters the first separator through the first feed pipe and is completely vaporized. Then close the first feed pipe and the first discharge pipe.

[0018] Slowly open the first recovery pipe, allowing the dichlorofluoromethane in the lower layer to enter the second storage tank until the pressure at the outlet of the second storage tank reaches above 18 bar, then close the first recovery pipe.

[0019] Furthermore, the mixture of dichlorofluoromethane and trifluoromethane is introduced into the third storage tank, and the temperature in the first storage tank is controlled within the range of -30°C to -40°C. The mixture is left to stand for 12 to 24 hours until the dichlorofluoromethane and trifluoromethane separate into layers.

[0020] Slowly open the second feed pipe, and the trifluoromethane in the upper layer enters the first storage tank through the second discharge pipe and is completely vaporized. Then close the second feed pipe and the second discharge pipe.

[0021] Slowly open the second recovery pipe, allowing the dichlorofluoromethane in the lower layer to enter the fourth storage tank until the outlet pressure of the fourth storage tank reaches above 18 bar, then close the second recovery pipe.

[0022] Furthermore, when the liquid level in the first storage tank reaches zero, the first discharge pipe is opened, and trifluoromethane flows back from the first separator to the first storage tank.

[0023] This embodiment of the present invention provides a separation device for separating dichlorofluoromethane and trifluoromethane. The function of the heat exchange component is to exchange heat between dichlorofluoromethane and trifluoromethane. The heat exchange component includes a first storage tank, a second storage tank, a first cascade evaporator, a compressor, a heat exchanger, and multiple evaporation components. The second storage tank is connected to the upper part of the first cascade evaporator. The first storage tank is connected to one end of the tube side of the heat exchanger. The other end of the tube side of the heat exchanger is connected to one end of the multiple evaporation components. A first reflux pipe is provided between one end of the shell side of the heat exchanger and the compressor. The other end of the shell side of the heat exchanger is connected to the other end of the evaporation components. The compressor is connected to the first cascade evaporator. A second liquid inlet pipe is provided between the first storage tank and the lower part of the first cascade evaporator. A second exhaust pipe is provided at the upper part of the second storage tank.The separation unit separates dichlorofluoromethane and trifluoromethane. The separation unit includes a first separation tank, a first feed pipe, a first discharge pipe, and a first recovery pipe. One end of the first feed pipe is connected to the first storage tank, and the other end is connected to the first separation tank. One end of the first discharge pipe is connected to the first reflux pipe, and the other end is connected to the first separation tank. One end of the first recovery pipe is connected to the second storage tank, and the other end is connected to the first storage tank. Compared to existing technologies, current methods involve shutting down the equipment, using a non-condensable condenser for treatment, and then discharging into the atmosphere. Then, the heat exchanger is repaired by welding and refilled with trifluoromethane and dichlorofluoromethane to continue operating the equipment. However, this method not only damages the outer atmosphere but also greatly increases the consumption of trifluoromethane and dichlorofluoromethane, thereby increasing the company's operating costs. In this technical solution, the damaged heat exchanger is repaired first, and then the mixed gas of dichlorofluoromethane and trifluoromethane is transported to the first storage tank. The temperature of the first storage tank is adjusted by regulating the liquid level in the first cascade evaporator, so that the temperature of the first storage tank is reduced to -20℃ to -40℃. In the low-temperature environment, the density difference between dichlorofluoromethane and trifluoromethane will decrease with temperature. The density of dichlorofluoromethane decreases while its density increases, and since the density of dichlorofluoromethane is always higher than that of trifluoromethane, the mixed solution of dichlorofluoromethane and trifluoromethane will naturally separate into layers in the first storage tank. Dichlorofluoromethane will be located at the bottom of the trifluoromethane layer. The mixed liquid in the first storage tank will then be allowed to stand for at least 12 hours. After that, the first feed pipe will be slowly opened, and the pressure in the first separation tank will gradually increase while the liquid level in the cascade evaporator will be reduced. This will allow the trifluoromethane in the upper layer to gradually vaporize and be transferred to the first separation tank through the first feed pipe until the pressure in the first separation tank stabilizes. This indicates that the trifluoromethane has been completely vaporized. The first feed pipe is then closed, and the first recovery pipe is slowly opened. The dichlorofluoromethane in the first storage tank enters the second storage tank through the first recovery pipe. Normally, the outlet pressure of the second storage tank is 12.5 bar. When the outlet pressure of the second storage tank is higher than 12.5 bar, it indicates that all the dichlorofluoromethane has entered the second storage tank. The first recovery pipe is then closed. A small amount of the mixed solution will remain in the first storage tank. This remaining mixed solution is treated by the non-condensable gas venting device, thus achieving the technical effect of separating dichlorofluoromethane and trifluoromethane. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a first separation device for separating dichlorofluoromethane and trifluoromethane provided in an embodiment of this utility model;

[0025] Figure 2A schematic diagram of the valve distribution structure of the first separation device for separating dichlorofluoromethane and trifluoromethane provided in this embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a second separation device for separating dichlorofluoromethane and trifluoromethane provided in an embodiment of this utility model;

[0027] Figure 4 A schematic diagram of the valve distribution structure of a second separation device for separating dichlorofluoromethane and trifluoromethane provided in this embodiment of the present invention. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a separation device for separating dichlorofluoromethane and trifluoromethane, the device comprising:

[0030] The heat exchange component includes a first storage tank 11, a second storage tank 12, a first cascade evaporator 13, a compressor 14, a heat exchanger 15, and multiple evaporation components 16. The second storage tank 12 is connected to the upper part of the first cascade evaporator 13. The first storage tank 11 is connected to one end of the heat exchanger 15. The other end of the tube side of the heat exchanger 15 is connected to one end of the multiple evaporation components 16. A first return pipe 17 is provided between one end of the shell side of the heat exchanger 15 and the compressor 14. The other end of the shell side of the heat exchanger 15 is connected to the other end of the evaporation component 16. The compressor 14 is connected to the first cascade evaporator 13. A second liquid inlet pipe 18 is provided between the first storage tank 11 and the lower part of the first cascade evaporator 13. A second exhaust pipe 19 is provided at the upper part of the second storage tank 12.

[0031] The separation component includes a first separation tank 21, a first feed pipe 22, a first discharge pipe 23, and a first recovery pipe 24. One end of the first feed pipe 22 is connected to the first storage tank 11, and the other end is connected to the first separation tank 21. One end of the first discharge pipe 23 is connected to the first return pipe 17, and the other end is connected to the first separation tank 21. One end of the first recovery pipe 24 is connected to the second storage tank 12, and the other end is connected to the first storage tank 11.

[0032] This embodiment of the present invention provides a separation device for separating dichlorofluoromethane and trifluoromethane. The heat exchange component facilitates heat exchange between the dichlorofluoromethane and trifluoromethane. The heat exchange component includes a first storage tank 11, a second storage tank 12, a first cascade evaporator 13, a compressor 14, a heat exchanger 15, and multiple evaporation components 16. The second storage tank 12 is connected to the upper part of the first cascade evaporator 13, and the first storage tank 11 is connected to one end of the tube side of the heat exchanger 15. The other end of the tube side of the heat exchanger 15 is connected to one end of the plurality of evaporation components 16. A first return pipe 17 is provided between one end of the shell side of the heat exchanger 15 and the compressor 14. The other end of the shell side of the heat exchanger 15 is connected to the other end of the evaporation component 16. The compressor 14 is connected to the first cascade evaporator 13. A second liquid inlet pipe 18 is provided between the first storage tank 11 and the lower part of the first cascade evaporator 13. A second exhaust pipe 19 is provided at the upper part of the second storage tank 12.The separation component is used to separate dichlorofluoromethane and trifluoromethane. The separation component includes a first separation tank 21, a first feed pipe 22, a first discharge pipe 23, and a first recovery pipe 24. One end of the first feed pipe 22 is connected to the first storage tank 11, and the other end is connected to the first separation tank 21. One end of the first discharge pipe 23 is connected to the first return pipe 17, and the other end is connected to the first separation tank 21. One end of the first recovery pipe 24 is connected to the second storage tank 12, and the other end is connected to the first storage tank 11. Compared to existing technologies, current methods involve shutting down the equipment, using a non-condensable discharge device for treatment, and then discharging into the air. Then, the heat exchanger 15 is repaired by welding and refilled with trifluoromethane and dichlorofluoromethane to continue operating the equipment. However, this method not only damages the external atmosphere but also greatly increases the consumption of trifluoromethane and dichlorofluoromethane, thereby increasing the company's operating costs. In this technical solution, the damaged heat exchanger 15 is repaired first, and then the mixed gas of dichlorofluoromethane and trifluoromethane is transported to the first storage tank 11. The temperature of the first storage tank 11 is adjusted by regulating the liquid level in the first cascade evaporator 13, so that the temperature of the first storage tank 11 is reduced to -20℃ to -40℃. Of course, a first temperature regulator can also be added and installed on the first storage tank 11. In low-temperature environments, The density difference between dichlorofluoromethane and trifluoromethane increases as the temperature decreases, and the density of dichlorofluoromethane is always higher than that of trifluoromethane. This causes the mixed solution of dichlorofluoromethane and trifluoromethane to separate into layers. Consequently, the mixed solution naturally separates into layers in the first storage tank 11, with dichlorofluoromethane at the bottom of the trifluoromethane layer. The mixed liquid in the first storage tank 11 is then allowed to stand for at least 12 hours. Afterward, the first feed pipe 22 is slowly opened, and the pressure in the first separation tank 21 is gradually increased, while the liquid level in the cascade evaporator is reduced. This causes the trifluoromethane in the upper layer to gradually vaporize and transfer through the first feed pipe 22 to the first separation tank 21, until the first separation tank 21... After the pressure stabilizes, it indicates that the trifluoromethane has been completely vaporized. The first feed pipe 22 is then closed, and the first recovery pipe 24 is slowly opened. The dichlorofluoromethane in the first storage tank 11 enters the second storage tank 12 through the first recovery pipe 24. Under normal circumstances, the outlet pressure of the second storage tank 12 is 12.5 bar. When the outlet pressure of the second storage tank 12 is higher than 12.5 bar, it indicates that all the dichlorofluoromethane has entered the second storage tank 12. Then, the first recovery pipe 24 is closed. A small amount of mixed solution will remain in the first storage tank 11. This remaining mixed solution is treated by the non-condensable gas venting device, thus achieving the technical effect of separating dichlorofluoromethane and trifluoromethane.

[0033] The heat exchange components described above function to exchange heat between dichlorofluoromethane and trifluoromethane. These components include a first storage tank 11, a second storage tank 12, a first cascade evaporator 13, a compressor 14, a heat exchanger 15, and multiple evaporation components 16. The second storage tank 12 is connected to the upper part of the first cascade evaporator 13. The first storage tank 11 is connected to one end of the tube side of the heat exchanger 15. The other end of the tube side of the heat exchanger 15 is connected to one end of each of the multiple evaporation components 16. A first return pipe 17 is provided between one end of the shell side of the heat exchanger 15 and the compressor 14. The other end of the shell side of the heat exchanger 15 is connected to the other end of each evaporation component 16. The compressor 14 is connected to the first cascade evaporator 13. The first storage tank 11 and the first... A second liquid inlet pipe 18 is provided between the lower parts of the cascade evaporator 13, and a second exhaust pipe 19 is provided at the upper part of the second storage tank 12. The first storage tank 11, the second storage tank 12, the first cascade evaporator 13, the compressor 14, the heat exchanger 15, and multiple evaporation components 16 are existing heat exchange equipment. Trifluoromethane is loaded in the first storage tank 11. When heat exchange is required, the valve of the first storage tank 11 is opened, allowing the trifluoromethane to enter the heat exchanger 15 to exchange heat with dichlorofluoromethane. Then, it enters the multiple evaporation components 16 to exchange heat with the material, absorbing a large amount of heat and turning the trifluoromethane liquid into a low-temperature gas. Then, it enters the first cascade evaporator 13 through the compressor 14 to exchange heat with dichlorofluoromethane, and then returns to the first storage tank 11. The dichlorofluoromethane after heat exchange enters the second storage tank 12.The separation component is used to separate dichlorofluoromethane and trifluoromethane. The separation component includes a first separation tank 21, a first feed pipe 22, a first discharge pipe 23, and a first recovery pipe 24. One end of the first feed pipe 22 is connected to the first storage tank 11, and the other end is connected to the first separation tank 21. One end of the first discharge pipe 23 is connected to the first reflux pipe 17, and the other end is connected to the first separation tank 21. One end of the first recovery pipe 24 is connected to the second storage tank 12. The other end is connected to the first storage tank 11. When the tubes of the first cascade evaporator 13 leak, trifluoromethane will leak into the dichlorofluoromethane system, causing the dichlorofluoromethane unit's exhaust pressure to be too high, thus causing the dichlorofluoromethane unit to trip and the dichlorofluoromethane system to malfunction. Under normal temperature conditions, dichlorofluoromethane and trifluoromethane can dissolve in each other. Therefore, after trifluoromethane and dichlorofluoromethane are mixed to form a mixed solution, the mixed solution is introduced into a tank, and then the first... The cascade evaporator 13 is welded and repaired. Then, the mixed solution is transported to the first storage tank 11. Specifically, the first storage tank 11 is equipped with a first mixing pipe 25 for introducing the mixed gas into the first storage tank 11. The temperature of the first storage tank 11 is adjusted by regulating the liquid level in the first cascade evaporator 13, lowering the temperature of the first storage tank 11 to -20°C to -40°C. In low-temperature environments, the density difference between dichlorofluoromethane and trifluoromethane increases as the temperature decreases, and the density of dichlorofluoromethane remains constant. The higher density of dichlorofluoromethane and trifluoromethane causes the mixed solution to separate into layers, resulting in natural stratification of the mixed solution in the first storage tank 11. Dichlorofluoromethane is located at the bottom of the trifluoromethane layer. The separation component also includes a first pressure detector, which is installed on the first storage tank 11 to detect the pressure inside the first storage tank 11. Specifically, the morphologies of dichlorofluoromethane and trifluoromethane under the same temperature but different pressure conditions are shown in Table 1.

[0034]

[0035] Table 1

[0036] Then, allow the mixed liquid in the first storage tank 11 to stand for at least 12 hours. Then, slowly open the first feed pipe 22, gradually increasing the pressure in the first separator 21 and decreasing the liquid level in the first cascade evaporator 13. This allows the trifluoromethane in the upper layer to gradually vaporize and transfer through the first feed pipe 22 to the first separator 21. Once the pressure in the first separator 21 stabilizes, it indicates that the trifluoromethane vaporization is complete. Close the first feed pipe 22, and then slowly open the first recovery pipe 24. The dichlorofluoromethane in the first storage tank 11 enters the second storage tank 12 through the first recovery pipe 24. Under normal circumstances, the outlet pressure of the second storage tank 12 is 12.5 bar. When the outlet pressure of the second storage tank 12 is higher than 12.5 bar, it indicates that all the dichlorofluoromethane has entered the second storage tank 12. Then, close the first recovery pipe 24, and the trifluoromethane in the first storage tank 11 will... A small amount of residual mixed solution is processed through a non-condensable gas venting device, thereby achieving the technical effect of separating dichlorofluoromethane and trifluoromethane. Specifically, a regulating valve is added, comprising a first valve 41, a second valve 42, a third valve 43, a fourth valve 44, a fifth valve 45, and a sixth valve 46. The first valve 41 and the third valve 43 are located on the first feed pipe 22, the second valve 42 and the fourth valve 44 are located on the first discharge pipe 23, and the fifth valve 45 and the sixth valve 46 are located on the first recovery pipe 24. When the first feed pipe 22 is slowly opened, the third valve 43 is fully opened, and the first valve 41 is slowly opened, causing the pressure inside the first separation tank 21 to gradually increase. The temperature inside the first separation tank 21 is approximately -20°C, and the pressure of the dichlorofluoromethane is approximately 1.4 bar. The pressure of trifluoromethane is 12.82 bar, therefore, trifluoromethane vaporizes first, and the pressure increases. Dichlorofluoromethane will not vaporize because there is no space for it to vaporize. The liquid level in the cascade evaporator is reduced, and the temperature rises to about -10°C. The pressure of trifluoromethane is 17.55 bar. At this point, the pressure is controlled. If the pressure in the first storage tank 11 is still rising, it means that the trifluoromethane has not completely vaporized. If the space in the first separation tank 21 is insufficient, we can open the second valve 42 and the fourth valve 44 to smoothly transfer the trifluoromethane gas to the first return pipe 1. In step 7, the trifluoromethane in the upper layer is gradually vaporized and transferred to the first separator 21 through the first feed pipe 22 until the pressure in the first separator 21 stabilizes, indicating that the trifluoromethane has been completely vaporized. The first valve 41 and the second valve 42 are then closed, and the fifth valve 45 is opened. The sixth valve 46 is then slowly opened, and the opening degree of the sixth valve 46 is controlled according to the liquid level in the first storage tank 11. The dichlorofluoromethane in the first storage tank 11 enters the second storage tank 12 through the first recovery pipe 24. At this time, the gas phase pressure in the second storage tank 12 is -0.At a pressure of 4 bar, the dichlorofluoromethane in the first storage tank 11 is drawn into the second storage tank 12, thus achieving the technical effect of separating trifluoromethane and dichlorofluoromethane.

[0037] Furthermore, such as Figure 3 and Figure 4As shown, the separation component includes a second cascade evaporator 31, a third storage tank 32, a fourth storage tank 33, a second feed pipe 34, a second discharge pipe 35, and a second recovery pipe 36. The fourth storage tank 33 is connected to the upper part of the second cascade evaporator 31. One end of the second feed pipe 34 is connected to the third storage tank 32, and the other end is connected to one end of the tube side of the second cascade evaporator 31. One end of the second discharge pipe 35 is connected to the middle of the tube side of the second cascade evaporator 31, and the other end is connected to the first reflux pipe 17. One end of the second recovery pipe 36 is connected to the third storage tank 32, and the other end is connected to the fourth storage tank 33.In this embodiment, another separation device for separating dichlorofluoromethane and trifluoromethane is provided. The entire system contains two refrigeration systems: a first refrigeration system for heat exchange and a second refrigeration system for separation. When the second cascade evaporator 31 leaks, the liquid supply valve is closed, and all the mixed solution in the system is transferred to the third storage tank 32. Specifically, the third storage tank 32 is equipped with a second mixing pipe 37 for introducing mixed gas into the third storage tank 32. Then, the second refrigeration system is shut off, the leak in the second cascade evaporator 31 is welded and repaired, and the temperature of the third storage tank 32 is adjusted by regulating the liquid level in the second cascade evaporator 31. Alternatively, a second temperature regulator can be added, installed on the third storage tank 32, to adjust the temperature inside the third storage tank 32 and control it between -30℃ and -40℃. In low-temperature environments, the density difference between dichlorofluoromethane and trifluoromethane increases as the temperature decreases, and the density of dichlorofluoromethane is always higher than that of trifluoromethane. This causes the mixed solution of dichlorofluoromethane and trifluoromethane to separate into layers, resulting in natural stratification in the third storage tank 32, with dichlorofluoromethane at the bottom of the trifluoromethane layer. The mixed liquid in the third storage tank 32 should then be allowed to stand for at least 12 hours. In an environment of -30℃, the pressure inside the third storage tank 32 and the second cascade evaporator 31 is approximately 9 bar. All the dichlorofluoromethane cools into a liquid state and accumulates at the bottom of the third storage tank 32. Specifically, the separation component also includes a first pressure detector, which is installed on the third storage tank 32 to detect the pressure inside. Then, the second feed pipe 34 and the second discharge pipe 35 are slowly opened, allowing the trifluoromethane in the upper layer of the third storage tank 32 to gradually vaporize and enter the first storage tank 11 through the second feed pipe 34, the second cascade evaporator 31, and the second discharge pipe 35. When the pressure in the third storage tank 32 matches the first reflux... When the pressure in pipe 17 is the same, close the second discharge pipe 35, and then slowly open the second recovery pipe 36. The dichlorofluoromethane in the third storage tank 32 enters the fourth storage tank 33 through the second recovery pipe 36. Under normal circumstances, the outlet pressure of the second storage tank 12 is 12.5 bar. When the outlet pressure of the second storage tank 12 is higher than 12.5 bar, it means that all the dichlorofluoromethane has entered the fourth storage tank 33. Then close the second recovery pipe 36. There will be a small amount of mixed solution remaining in the third storage tank 32. The remaining mixed solution is treated by the non-condensable gas venting device, thereby achieving the technical effect of separating dichlorofluoromethane and trifluoromethane.

[0038] Furthermore, the regulating valve also includes a seventh valve 51, an eighth valve 52, a ninth valve 53, and a tenth valve 54. The seventh valve 51 and the eighth valve 52 are disposed on the second discharge pipe 35, and the ninth valve 53 and the tenth valve 54 are disposed on the second recovery pipe 36. In this embodiment, the regulating valve is further defined. The second feed pipe 34 and the seventh valve 51 are opened, and the eighth valve 52 on the second discharge pipe 35 is slowly opened and its opening degree is controlled. The pressure in the third storage tank 32 decreases, and the liquid trifluoromethane vaporizes, resulting in a lower temperature in the third storage tank 32. This prevents the dichlorofluoromethane from vaporizing and flowing out. The trifluoromethane in the upper layer of the third storage tank 32 gradually vaporizes and enters the first storage tank 11 through the second feed pipe 34, the second cascade evaporator 31, and the second discharge pipe 35. When the pressure in the third storage tank 32 is the same as the pressure in the first return pipe 17 (1 bar), the seventh valve 51 and the eighth valve 52 are closed. Then, the ninth valve 53 and the tenth valve 54 are slowly opened. The dichlorofluoromethane in the third storage tank 32 enters the fourth storage tank 33 through the second recovery pipe 36, thereby achieving the technical effect of separating dichlorofluoromethane and trifluoromethane.

[0039] The steps for using a separation device for separating dichlorofluoromethane and trifluoromethane are as follows:

[0040] A mixture of dichlorofluoromethane and trifluoromethane is introduced into the first storage tank, and the temperature inside the first storage tank is controlled within the range of -20°C to -40°C. The mixture is left to stand for 12 to 24 hours until the dichlorofluoromethane and trifluoromethane separate into layers.

[0041] Slowly open the first feed pipe, and the trifluoromethane in the upper layer enters the first separator through the first feed pipe and is completely vaporized. Then close the first feed pipe and the first discharge pipe.

[0042] Slowly open the first recovery pipe, allowing the dichlorofluoromethane in the lower layer to enter the second storage tank until the pressure at the outlet of the second storage tank reaches above 18 bar, then close the first recovery pipe.

[0043] This embodiment describes a method for separating dichlorofluoromethane and trifluoromethane. By controlling the temperature of a first storage tank, the mixture of dichlorofluoromethane and trifluoromethane is separated into layers. Then, a first separation tank is added, and trifluoromethane is introduced into the first separation tank. Finally, the dichlorofluoromethane is transported to a second storage tank, thereby achieving the technical effect of separating dichlorofluoromethane and trifluoromethane.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A separation apparatus for separating dichlorofluoromethane and trifluoromethane, characterized in that, include: A heat exchange component includes a first storage tank, a second storage tank, a first cascade evaporator, a compressor, a heat exchanger, and multiple evaporation components. The second storage tank is connected to the upper part of the first cascade evaporator. The first storage tank is connected to one end of the tube side of the heat exchanger. The other end of the tube side of the heat exchanger is connected to one end of the multiple evaporation components. A first reflux pipe is provided between one end of the shell side of the heat exchanger and the compressor. The other end of the shell side of the heat exchanger is connected to the other end of the evaporation components. The compressor is connected to the first cascade evaporator. A second liquid inlet pipe is provided between the first storage tank and the lower part of the first cascade evaporator. A second exhaust pipe is provided at the upper part of the second storage tank. The separation component includes a first separation tank, a first feed pipe, a first discharge pipe, and a first recovery pipe. One end of the first feed pipe is connected to the first storage tank, and the other end is connected to the first separation tank. One end of the first discharge pipe is connected to the first return pipe, and the other end is connected to the first separation tank. One end of the first recovery pipe is connected to the second storage tank, and the other end is connected to the first storage tank.

2. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 1, characterized in that, A first mixing pipe is provided on the first storage tank for introducing mixed gas into the first storage tank.

3. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 1, characterized in that, The separation component also includes a first pressure detector, which is installed on the first storage tank and is used to detect the pressure inside the first storage tank.

4. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 1, characterized in that, The separation component includes a second cascade evaporator, a third storage tank, a fourth storage tank, a second feed pipe, a second discharge pipe, and a second recovery pipe. The fourth storage tank is connected to the upper part of the second cascade evaporator. One end of the second feed pipe is connected to the third storage tank, and the other end is connected to one end of the tube side of the second cascade evaporator. One end of the second discharge pipe is connected to the middle of the tube side of the second cascade evaporator, and the other end is connected to the first reflux pipe. One end of the second recovery pipe is connected to the third storage tank, and the other end is connected to the fourth storage tank.

5. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 4, characterized in that, A second mixing pipe is provided on the third storage tank for introducing mixed gas into the third storage tank.

6. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 4, characterized in that, The separation component also includes a first pressure detector, which is installed on the third storage tank and is used to detect the pressure inside the third storage tank.

7. The separation apparatus for separating dichlorofluoromethane and trifluoromethane according to claim 1, characterized in that, Also includes: The regulating valve includes a first valve, a second valve, a third valve, a fourth valve, a fifth valve, and a sixth valve. The first valve and the third valve are installed on the first feed pipe, the second valve and the fourth valve are installed on the first discharge pipe, and the fifth valve and the sixth valve are installed on the first recovery pipe.

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