Dichloromethane waste gas recovery device

Abstract

The utility model discloses a dichloromethane waste gas recovery device which is characterized in that a first outlet end of a first filter is connected with a first inlet / outlet of a first adsorption bed, and a second inlet / outlet of the first adsorption bed is connected with a first inlet / outlet of a second adsorption bed; a first inlet / outlet of the first adsorption bed and a first inlet / outlet of the second adsorption bed are connected through a first inlet end of the first condenser, a first outlet end of the first condenser is connected with a first inlet end of the first storage tank, and a first outlet end of the first storage tank is connected with the first inlet end of the first condenser through the first vacuum pump; the first outlet end of the first condenser is connected with the first inlet end of the first gas-liquid separator, and the first outlet end of the first gas-liquid separator is connected with the first inlet end of the second storage tank. According to the dichloromethane waste gas recovery device provided by the utility model, waste gas in dichloromethane can be adsorbed, dichloromethane can be recovered, and the purity of dichloromethane recovery liquid can be ensured through multiple adsorption.

Description

Technical Field

[0001] The utility model belongs to the technical field of recovery, and particularly relates to a dichloromethane waste gas recovery device. Background Art

[0002] Dichloromethane (DCM) is a non-flammable low-boiling solvent, which is often used in industrial production. Due to its low boiling point, it is very easy to volatilize in industrial production. Therefore, dichloromethane is contained in some industrial waste gases. The direct emission of dichloromethane waste gas will cause great pollution to the atmosphere, damage the health of operators, and affect the environment of surrounding residents. Therefore, it is necessary to recover and treat dichloromethane waste gas. Therefore, in order not to affect the environment, it is necessary to design a dichloromethane waste gas recovery device. Summary of the Invention

[0003] In order to solve the deficiencies of the existing technology, the utility model provides a dichloromethane waste gas recovery device.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A dichloromethane waste gas recovery device includes a first adsorption bed, a second adsorption bed, a first exhaust fan, a first condenser, a first filter, a first cooler, a first storage tank, a first vacuum pump, a first gas-liquid separator and a second storage tank. The first inlet end of the first filter is connected to a dichloromethane waste gas source. The first outlet end of the first filter is connected to the first inlet and outlet of the first adsorption bed. The second inlet and outlet of the first adsorption bed are connected to the first inlet and outlet of the second adsorption bed. The second inlet and outlet of the second adsorption bed are connected to the first inlet end of the first exhaust fan. The first inlet and outlet of the first adsorption bed and the first inlet and outlet of the second adsorption bed are both connected to the first inlet end of the first condenser. The first outlet end of the first condenser is connected to the first inlet end of the first storage tank. The first outlet end of the first storage tank is connected to the first inlet end of the first vacuum pump. The first outlet end of the first vacuum pump is connected to the first inlet end of the first condenser. The first outlet end of the first condenser is connected to the first inlet end of the first gas-liquid separator. The first outlet end of the first gas-liquid separator is connected to the first inlet end of the second storage tank.

[0006] Further, the dichloromethane waste gas recovery device includes a second condenser, a second gas-liquid separator, and a third storage tank. The first inlet end of the second condenser is connected to the first inlet end of the first filter. The first outlet end of the second condenser is connected to the first inlet end of the second gas-liquid separator. The first outlet end of the second gas-liquid separator is connected to the first inlet end of the third storage tank. The second outlet end of the second gas-liquid separator and the first outlet end of the third storage tank are both connected to the first inlet end of the first filter.

[0007] Further, the dichloromethane waste gas recovery device includes a fourth storage tank and a first liquid discharge pump. The first inlet end of the fourth storage tank is connected to the second outlet end of the first vacuum pump. The first outlet end of the fourth storage tank is connected to the first inlet end of the first liquid discharge pump. The second outlet end of the first storage tank, the first outlet end of the second storage tank, and the second outlet end of the third storage tank are all connected to the first inlet end of the first liquid discharge pump.

[0008] Further, the dichloromethane waste gas recovery device includes a first cooler and a first cooling fan. The first inlet end of the first cooler is connected to the first inlet end of the first cooling fan. The first outlet end of the first cooling fan is connected to the first inlet and outlet of the first adsorption bed.

[0009] Further, the dichloromethane waste gas recovery device includes a third adsorption bed, a fourth adsorption bed, and a second vacuum pump. The first inlet and outlet of the first adsorption bed is connected to the first inlet and outlet of the third adsorption bed. The second inlet and outlet of the third adsorption bed is connected to the first inlet and outlet of the fourth adsorption bed. The second inlet and outlet of the fourth adsorption bed is connected to the second inlet and outlet of the second adsorption bed. The first inlet end of the second vacuum pump is connected to the first inlet end of the first vacuum pump. The first outlet end of the second vacuum pump is connected to the first outlet end of the first vacuum pump.

[0010] A dichloromethane waste gas recovery device disclosed by the present utility model, compared with the prior art, has the beneficial effects that its structure is stable and reliable, it can adsorb waste gas in dichloromethane and recover dichloromethane. Through the first adsorption bed, the second adsorption bed, the third adsorption bed, and the fourth adsorption bed, waste gas can be adsorbed independently or by secondary adsorption, and multiple adsorption can ensure the purity of the dichloromethane recovery liquid. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of a preferred embodiment provided by the present utility model.

[0012] Figure 2 is a schematic structural diagram of the second gas-liquid separator of a preferred embodiment provided by the present utility model.

[0013] Figure 3 It is a schematic structural diagram of the first vacuum pump of the preferred embodiment provided by the present utility model.

[0014] The reference numerals include: 1, the first adsorption bed; 2, the second adsorption bed; 3, the third adsorption bed; 4, the fourth adsorption bed; 5, the second condenser; 6, the first filter; 7, the second gas-liquid separator; 8, the third storage tank; 9, the first cooler; 10, the first vacuum pump; 11, the second vacuum pump; 12, the first storage tank; 13, the first condenser; 14, the first gas-liquid separator; 15, the fourth storage tank; 16, the second storage tank; 17, the first liquid discharge pump; 18, the first cooler; 19, the first cooling fan. Detailed implementation manners

[0015] The present utility model discloses a dichloromethane waste gas recovery device. The following further describes the detailed implementation manners of the present utility model in combination with the preferred embodiments.

[0016] Referring to the attached drawings Figures 1-3 , Figure 1 is a schematic structural diagram of the preferred embodiment provided by the present utility model, Figure 2 is a schematic structural diagram of the second gas-liquid separator 7 of the preferred embodiment provided by the present utility model, Figure 3 is a schematic structural diagram of the first vacuum pump 10 of the preferred embodiment provided by the present utility model.

[0017] Preferred embodiment.

[0018] This embodiment provides a dichloromethane waste gas recovery device, including a first adsorption bed 1, a second adsorption bed 2, a first exhaust fan, a first condenser 13, a first filter 6, a first cooler 18, a first storage tank 12, a first vacuum pump 10, a first gas-liquid separator 14, and a second storage tank 16. The first inlet end of the first filter 6 is connected to a dichloromethane waste gas source. The first outlet end of the first filter 6 is connected to the first inlet and outlet of the first adsorption bed 1. The second inlet and outlet of the first adsorption bed 1 are connected to the first inlet and outlet of the second adsorption bed 2. The second inlet and outlet of the second adsorption bed 2 are connected to the first inlet end of the first exhaust fan. The first inlet and outlet of the first adsorption bed 1 and the first inlet and outlet of the second adsorption bed 2 are both connected to the first inlet end of the first condenser 13. The first outlet end of the first condenser 13 is connected to the first inlet end of the first storage tank 12. The first outlet end of the first storage tank 12 is connected to the first inlet end of the first vacuum pump 10. The first outlet end of the first vacuum pump 10 is connected to the first inlet end of the first condenser 13. The first outlet end of the first condenser 13 is connected to the first inlet end of the first gas-liquid separator 14. The first outlet end of the first gas-liquid separator 14 is connected to the first inlet end of the second storage tank 16.

[0019] Further, the dichloromethane waste gas recovery device includes a second condenser 5, a second gas-liquid separator 7, and a third storage tank 8. The first inlet end of the second condenser 5 is connected to the first inlet end of the first filter 6. The first outlet end of the second condenser 5 is connected to the first inlet end of the second gas-liquid separator 7. The first outlet end of the second gas-liquid separator 7 is connected to the first inlet end of the third storage tank 8. The second outlet end of the second gas-liquid separator 7 and the first outlet end of the third storage tank 8 are both connected to the first inlet end of the first filter 6.

[0020] Further, the dichloromethane waste gas recovery device includes a fourth storage tank 15 and a first liquid outlet pump 17. The first inlet end of the fourth storage tank 15 is connected to the second outlet end of the first vacuum pump 10. The first outlet end of the fourth storage tank 15 is connected to the first inlet end of the first liquid outlet pump 17. The second outlet end of the first storage tank 12, the first outlet end of the second storage tank 16, and the second outlet end of the third storage tank 8 are all connected to the first inlet end of the first liquid outlet pump 17.

[0021] Further, the dichloromethane waste gas recovery device includes a first cooler 18 and a first cooling fan 19. The first inlet end of the first cooler 18 is connected to the first inlet end of the first cooling fan 19. The first outlet end of the first cooling fan 19 is connected to the first inlet and outlet of the first adsorption bed 1.

[0022] Further, the dichloromethane waste gas recovery device includes a third adsorption bed 3, a fourth adsorption bed 4, and a second vacuum pump 11. The first inlet and outlet of the first adsorption bed 1 are connected to the first inlet and outlet of the third adsorption bed 3. The second inlet and outlet of the third adsorption bed 3 are connected to the first inlet and outlet of the fourth adsorption bed 4. The second inlet and outlet of the fourth adsorption bed 4 are connected to the second inlet and outlet of the second adsorption bed 2. The first inlet end of the second vacuum pump 11 is connected to the first inlet end of the first vacuum pump 10, and the first outlet end of the second vacuum pump 11 is connected to the first outlet end of the first vacuum pump 10.

[0023] Working principle: The first cooler 18, the first vacuum pump 10, and the second vacuum pump 11 are all connected to circulating cooling water, which can cool down the first cooler 18, the first vacuum pump 10, and the second vacuum pump 11. The first condenser 13 and the second condenser 5 are both connected to circulating brine, which can cool the first condenser 13 and the second condenser 5, and the cooling efficiency of the first condenser 13 and the second condenser 5 is higher.

[0024] The dichloromethane waste gas directly passes through the first filter 6, or is cooled by the second cooler and then separated by the gas-liquid separator. The gaseous substance passes through the filtration of the first filter 6 and enters the first adsorption bed 1, the second adsorption bed 2, the third adsorption bed 3, and the fourth adsorption bed 4. The first adsorption bed 1, the second adsorption bed 2, the third adsorption bed 3, and the fourth adsorption bed 4 absorb other substances in the waste gas and then are sent to the first cooler 18. After being cooled by the first cooler 18, the gaseous substance returns to the first adsorption bed 1, the second adsorption bed 2, the third adsorption bed 3, and the fourth adsorption bed 4, and the liquid substance enters the first storage tank 12. The first vacuum pump 10 and the second vacuum pump 11 extract the substances in the first storage tank 12 into the first condenser 13. After being condensed by the first condenser 13, it enters the first gas-liquid separator 14. The liquid substance enters the second storage tank 16, and the gaseous substance re-enters the first adsorption bed 1, the second adsorption bed 2, the third adsorption bed 3, and the fourth adsorption bed 4 for absorption. Through the repeated absorption of the first adsorption bed 1, the second adsorption bed 2, the third adsorption bed 3, and the fourth adsorption bed 4, dichloromethane recovery liquid can be obtained. Among them, the first adsorption bed 1 and the second adsorption bed 2 can adsorb independently or form a two-stage adsorption, which can ensure the adsorption effect of dichloromethane waste gas.

[0025] It is worth mentioning that the technical features such as storage tanks involved in the patent application of the present utility model should be regarded as the prior art. For the specific structures, working principles, control methods, and spatial arrangement methods that may be involved in these technical features, conventional selections in the art can be adopted, and they should not be regarded as the innovative points of the patent of the present utility model. The patent of the present utility model will not be further specifically elaborated.

[0026] For those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dichloromethane waste gas recovery device, characterized in that: The invention comprises a first adsorption bed (1), a second adsorption bed (2), a first exhaust fan, a first condenser (13), a first filter (6), a first cooler (18), a first storage tank (12), a first vacuum pump (10), a first gas-liquid separator (14) and a second storage tank (16), wherein a first inlet end of the first filter (6) is connected to a dichloromethane waste gas source, a first outlet end of the first filter (6) is connected to a first inlet end of the first adsorption bed (1), a second inlet end of the first adsorption bed (1) is connected to a first inlet end of the second adsorption bed (2), a second inlet end of the second adsorption bed (2) is connected to a first inlet end of the first exhaust fan, and a first adsorption bed (1) is connected to a first inlet end of the first adsorption bed (2). The first inlet and outlet of the first adsorption bed (2) and the first inlet and outlet of the second adsorption bed (2) are both connected to the first inlet end of the first condenser (13), the first outlet end of the first condenser (13) is connected to the first inlet end of the first storage tank (12), the first outlet end of the first storage tank (12) is connected to the first inlet end of the first vacuum pump (10), the first outlet end of the first vacuum pump (10) is connected to the first inlet end of the first condenser (13), the first outlet end of the first condenser (13) is connected to the first inlet end of the first gas-liquid separator (14), and the first outlet end of the first gas-liquid separator (14) is connected to the first inlet end of the second storage tank (16).

2. The methylene chloride waste gas recovery device according to claim 1, characterized in that: The dichloromethane waste gas recovery device comprises a second condenser (5), a second gas-liquid separator (7) and a third storage tank (8), wherein the first inlet end of the second condenser (5) is connected to the first inlet end of the first filter (6), the first outlet end of the second condenser (5) is connected to the first inlet end of the second gas-liquid separator (7), the first outlet end of the second gas-liquid separator (7) is connected to the first inlet end of the third storage tank (8), and the second outlet end of the second gas-liquid separator (7) and the first outlet end of the third storage tank (8) are both connected to the first inlet end of the first filter (6).

3. The dichloromethane waste gas recovery device according to claim 2, characterized in that: The dichloromethane waste gas recovery device comprises a fourth storage tank (15) and a first liquid outlet pump (17); the first inlet end of the fourth storage tank (15) is connected to the second outlet end of the first vacuum pump (10); the first outlet end of the fourth storage tank (15) is connected to the first inlet end of the first liquid outlet pump (17); the second outlet end of the first storage tank (12), the first outlet end of the second storage tank (16) and the second outlet end of the third storage tank (8) are all connected to the first inlet end of the first liquid outlet pump (17).

4. The dichloromethane waste gas recovery device according to claim 3, characterized in that: The dichloromethane waste gas recovery device comprises a first cooler (18) and a first cooling fan (19), wherein a first inlet end of the first cooler (18) is connected to a first inlet end of the first cooling fan (19), and a first outlet end of the first cooling fan (19) is connected to a first inlet and outlet of the first adsorption bed (1).

5. The dichloromethane waste gas recovery device according to claim 4, characterized in that: The dichloromethane waste gas recovery device comprises a third adsorption bed (3), a fourth adsorption bed (4) and a second vacuum pump (11); a first inlet and outlet of the first adsorption bed (1) is connected to a first inlet and outlet of the third adsorption bed (3); a second inlet and outlet of the third adsorption bed (3) is connected to a first inlet and outlet of the fourth adsorption bed (4); a second inlet and outlet of the fourth adsorption bed (4) is connected to a second inlet and outlet of the second adsorption bed (2); a first inlet end of the second vacuum pump (11) is connected to a first inlet end of the first vacuum pump (10); and a first outlet end of the second vacuum pump (11) is connected to a first outlet end of the first vacuum pump (10).

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