Closed water ring vacuum pump system

Abstract

The utility model discloses a closed water ring vacuum pump system which comprises a water ring vacuum pump, a gas-liquid separation tank, an oil-water layering tank, a water storage tank and a cooling tank, a water outlet of the water ring vacuum pump is connected with the gas-liquid separation tank; an exhaust port is formed in the top end of the gas-liquid separation tank, and the bottom end of the gas-liquid separation tank is connected with the oil-water layering tank; the lower part of the oil-water layering tank is connected with the water storage tank through a balance pipe; a water outlet of the water storage tank is connected with the cooling tank, and the cooling tank is connected with a water inlet of the water ring vacuum pump. According to the utility model, the wastewater in the water ring vacuum pump is subjected to effective oil removal and cooling treatment, and the treated wastewater flows back into the water ring vacuum pump, so that the cyclic utilization of a working solution in the water ring vacuum pump is realized, the utilization rate of water resources is improved, the wastewater discharge is reduced, and the environmental pollution is reduced. The operation cost of the water ring vacuum pump and the wastewater treatment cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of vacuum pumps, in particular to a closed water ring vacuum pump system. Background Art

[0002] In the fields of chemical industry and organic synthesis, water ring vacuum pumps are often used for vacuuming. Water ring vacuum pumps work by continuously sucking or pressurizing gas.

[0003] The water ring vacuum pump will generate heat during the vacuum process, causing the water ring in the pump body to heat up, and part of the water or water vapor will be discharged along with the compressed gas. Therefore, during the operation, the water ring vacuum pump must be continuously supplied with water to cool and replenish the water consumed in the pump to meet its working requirements.

[0004] Because the water ring vacuum pump will inevitably inhale the organic waste gas generated in the reactor during the process of pumping gas, these waste gases dissolve into the water in the water ring vacuum pump to form wastewater, resulting in a large amount of wastewater discharge.

[0005] The existing water ring vacuum pump needs to replenish a large amount of fresh water on the one hand, and discharge a large amount of wastewater on the other hand, which consumes a large amount of water resources, and the wastewater treatment fee is high and the cost is high. Utility Model Content

[0006] The utility model provides a closed water ring vacuum pump system, which can solve the problems of large water resource consumption, large wastewater treatment volume and high cost of the existing water ring vacuum pump.

[0007] In order to solve the above technical problems, the utility model provides a closed water ring vacuum pump system, including: a water ring vacuum pump, a gas-liquid separation tank, an oil-water separation tank, a water storage tank and a cooling tank;

[0008] The vacuum exhaust port of the water ring vacuum pump is connected to the gas-liquid separation tank through a pipeline;

[0009] The top of the gas-liquid separation tank is provided with an exhaust port, and the bottom of the gas-liquid separation tank is connected to the oil-water separation tank through a pipeline;

[0010] The upper part of the oil-water separation tank is connected to the oil collection tank, and the lower part thereof is connected to the water storage tank through a balance pipe;

[0011] The water outlet of the water storage tank is connected to the cooling tank through a pipeline with a water pump, and the cooling tank is connected to the water inlet of the water ring vacuum pump through a pipeline.

[0012] In a preferred embodiment of the utility model, the water storage tank is provided with a first liquid level gauge, and the cold water tank is provided with a second liquid level gauge, the first liquid level gauge and the second liquid level gauge are respectively connected to the program controller signal, the first liquid level gauge is connected to the water pump linkage control through the program controller; the second liquid level gauge is connected to the water pump linkage control through the program controller.

[0013] In a preferred embodiment of the utility model, the cold water tank is also provided with a water supply pipe and a water supply valve; the second liquid level meter is connected to the water supply valve through the program controller in linkage control.

[0014] In a preferred embodiment of the utility model, a cooling coil and a temperature controller are installed in the cooling tank, and a cooling water flow regulating valve is installed on the cooling water inlet end of the cooling coil; the temperature controller is signal-connected to the program controller, and the temperature controller is linked and controlled by the program controller with the cooling water flow regulating valve.

[0015] In a preferred embodiment of the present invention, the height of the connecting end of the balancing pipe and the oil-water separation tank is lower than the height of the connecting end of the balancing pipe and the water storage tank.

[0016] In a preferred embodiment of the utility model, the closed water ring vacuum pump system further includes a tail gas treatment device, and the exhaust port of the gas-liquid separation tank is connected to the tail gas treatment device through a pipeline.

[0017] In a preferred embodiment of the utility model, the top of the oil-water stratification tank is connected to the exhaust gas treatment device through a pipeline.

[0018] In a preferred embodiment of the present utility model, the top end of the water storage tank is connected to the exhaust gas treatment device through a pipeline.

[0019] The beneficial effects of the utility model are as follows: the utility model is a closed water ring vacuum pump system, which realizes effective oil removal and cooling treatment of wastewater in the water ring vacuum pump through the design of the gas-liquid separation tank, the oil-water stratification tank, the water storage tank and the cooling tank, and returns the treated wastewater to the water ring vacuum pump, thereby realizing the recycling of the working fluid in the water ring vacuum pump, improving the utilization rate of water resources, reducing wastewater discharge, reducing the operating cost of the water ring vacuum pump and the wastewater treatment cost, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of a closed water ring vacuum pump system of the utility model;

[0021] The components in the accompanying drawings are marked as follows: 10. Water ring vacuum pump, 20. Gas-liquid separation tank, 30. Oil-water stratification tank, 40. Water storage tank, 50. Cooling tank, 60. Exhaust treatment device, 70. Oil collection tank, 11. Air inlet, 12. Vacuum exhaust port, 13. Water inlet, 21. Exhaust port, 31. Oil outlet, 32. Balance pipe, 41. Water outlet, 42. Water pump, 43. First liquid level meter, 51. Cooling coil, 512. Cooling water regulating valve, 52. Second liquid level meter, 53. Water supply pipe, 531. Water supply valve, 54. Temperature sensor. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0023] Example 1

[0024] like Figure 1 As shown, the embodiment of the utility model discloses a closed water ring vacuum pump system, including: a water ring vacuum pump 10, a gas-liquid separation tank 20, an oil-water stratification tank 30, a water storage tank 40, a cooling tank 50 and an exhaust gas treatment device 60.

[0025] Specifically, the water ring vacuum pump 10 has an air inlet 11, a vacuum exhaust port 12 and a water inlet 13. Waste gas such as organic gas enters the water ring vacuum pump 10 through the air inlet 11 and dissolves in the working fluid in the water ring vacuum pump. The vacuum exhaust port 12 is connected to the gas-liquid separation tank 20 through a pipeline. During the exhaust process, the water ring vacuum pump 10 will carry the working fluid (or wastewater) dissolved with the waste gas and discharge it into the gas-liquid separation tank 20 through the vacuum exhaust port 12.

[0026] The top of the gas-liquid separation tank 20 is provided with an exhaust port 21, and the exhaust port 21 is connected to the tail gas treatment device 60 through a pipeline. The bottom of the gas-liquid separation tank 20 is connected to the oil-water separation tank 30 through a pipeline. Specifically, the wastewater entering the gas-liquid separation tank 20, the low-boiling non-condensable gas carried therein, escapes from the exhaust port 21 and enters the tail gas treatment device 60, preventing it from entering the air and polluting the environment; the wastewater enters the oil-water separation tank 30.

[0027] An oil outlet 31 is provided at the top of the oil-water stratification tank 30, and the oil outlet 31 is connected to the oil collection tank 70 through a pipeline. The top of the oil-water stratification tank 30 is connected to the tail gas treatment device 60 through a pipeline, which not only balances the air pressure, but also prevents the gas carried by the wastewater from entering the air and polluting the environment.

[0028] The lower part of the oil-water stratification tank 30 is connected to the water storage tank 40 through a balance pipe 32. Specifically, the connection end of the balance pipe 32 and the oil-water stratification tank 30 is close to the bottom of the oil-water stratification tank 30, and its height is lower than the height of the connection end of the balance pipe 32 and the water storage tank 40, ensuring that the water layer in the lower layer of the oil-water stratification tank 30 flows into the water storage tank 40. When the wastewater liquid level in the lower layer of the oil-water stratification tank 30 is higher than the connection end of the balance pipe 32 and the water storage tank 40, the wastewater flows into the water storage tank 40 through the balance pipe 32 to obtain deoiled wastewater, that is, the wastewater is deoiled.

[0029] The oil layer in the upper layer of the oil-water separation tank 30 flows out through the oil outlet 31 and is collected in the oil collection tank 70 for recycling.

[0030] The water tank 40 has a water outlet 41 at the bottom thereof, and the water outlet 41 is connected to the cooling tank 50 through a pipeline with a water pump 42. The water tank 40 is connected to a first liquid level gauge 43, which is connected to a program controller signal and is linked to the water pump 42 (specifically, a switch valve of the water pump) through the program controller to control the amount of water in the water tank 40.

[0031] The specific method is as follows: the program controller is preset with the lowest liquid level value and the highest liquid level value of the water tank 40; the first liquid level meter 43 detects the liquid level value in the water tank 40 in real time and transmits it to the program controller in the form of a signal; when the program controller finds, after comparison, that the liquid level value measured by the first liquid level meter 43 is lower than the lowest liquid level of the water tank 40, the water pump 42 is controlled to be turned off; when the liquid level value measured by the first liquid level meter 43 is higher than the highest liquid level of the water tank 40, the water pump 42 is controlled to be started.

[0032] A cooling coil 51 is installed in the cooling tank 50, and a cooling water inlet 511 of the cooling coil 51 is connected to a cooling water source. The cooling water inlet 511 is provided with a cooling water regulating valve 512. The cooling tank 50 is also connected with a water supply pipe 53, and the water supply pipe 53 is provided with a water supply valve 531. The cooling tank 50 is connected with a second liquid level gauge 52, which is connected to the program controller by signal, and is respectively connected to the water pump 42 (specifically, the switch valve of the water pump) and the water supply valve 531 through the program controller for linkage control, so as to control the amount of water in the water storage tank 40.

[0033] The specific method is as follows: the program controller is preset with the lowest liquid level value and the highest liquid level value of the cooling tank 50; the second liquid level meter 52 detects the liquid level value in the cooling tank 50 in real time and transmits it to the program controller in the form of a signal; when the program controller finds, after comparison, that the liquid level value measured by the second liquid level meter 52 is lower than the lowest liquid level of the cooling tank 50, the water pump 42 and the water supply valve 531 are regulated to be turned on; when the liquid level value measured by the second liquid level meter 52 is higher than the highest liquid level of the cooling tank 50, the water pump 42 and the water supply valve 531 are regulated to be turned off.

[0034] The cooling tank 50 is also connected to a temperature sensor 54. The temperature sensor 54 is connected to the program controller by signal, and is linked to the cooling water regulating valve 512 through the program controller to control the water temperature in the cooling tank 50.

[0035] The control method is as follows: a water temperature range value is preset in the program controller, and the temperature sensor 54 detects the water temperature in the cooling tank 50 in real time and transmits it to the program controller in the form of a signal; when the program controller finds, after comparison, that the water temperature in the cooling tank 50 is higher than the highest value in the set temperature range, the opening of the cooling water regulating valve 512 is controlled to be increased, so that more chilled water enters the cooling coil 51 to cool the water in the cooling tank 50; if the water temperature in the cooling tank 50 is lower than the set temperature range value, the opening of the cooling water regulating valve 512 is controlled to be reduced.

[0036] The water outlet of the cooling tank 50 is connected to the water inlet 13 of the water ring vacuum pump 10 through a pipeline, and the purified and cooled wastewater is returned to the water ring vacuum pump 10 for reuse, which improves the utilization rate of water resources on the one hand and reduces the cost of wastewater treatment on the other hand.

[0037] In addition, the top of the water storage tank 40 is connected to the exhaust gas treatment device 60 through a pipeline, which not only balances the air pressure but also prevents the gas carried by the wastewater from entering the air and polluting the environment.

[0038] The utility model provides a closed water ring vacuum pump system, which has the following advantages:

[0039] 1. Through the design of gas-liquid separation tank, oil-water stratification tank, water storage tank and cooling tank, the effective treatment and reuse of wastewater in the water ring vacuum pump can be realized. On the one hand, the utilization rate of water resources is improved and the operating cost of the water ring vacuum pump is reduced. On the other hand, the effective treatment of wastewater is realized, and the wastewater discharge and wastewater treatment cost are reduced.

[0040] 2. Through the design of the water storage tank, cooling tank, first liquid level gauge, second liquid level gauge and program controller, the water volume in the water storage tank and cooling tank can be controlled in real time, which ensures timely and effective treatment of wastewater discharged by the water ring vacuum pump on the one hand, and timely replenishment of water to the water ring vacuum pump on the other hand.

[0041] The closed water ring vacuum pump system of the utility model realizes the recycling of the working fluid in the water ring vacuum pump, reduces the discharge of waste water, reduces the cost and has strong practicality.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A closed water ring vacuum pump system, characterized in that: include: Water ring vacuum pump, gas-liquid separation tank, oil-water separation tank, water storage tank and cooling tank; The vacuum exhaust port of the water ring vacuum pump is connected to the gas-liquid separation tank through a pipeline; The top of the gas-liquid separation tank is provided with an exhaust port, and the bottom of the gas-liquid separation tank is connected to the oil-water separation tank through a pipeline; The upper part of the oil-water separation tank is connected to the oil collection tank, and the lower part thereof is connected to the water storage tank through a balance pipe; The water outlet of the water storage tank is connected to the cooling tank through a pipeline with a water pump, and the cooling tank is connected to the water inlet of the water ring vacuum pump through a pipeline.

2. A closed water ring vacuum pump system according to claim 1, characterized in that: The water storage tank is provided with a first liquid level gauge, and the cooling tank is provided with a second liquid level gauge. The first liquid level gauge and the second liquid level gauge are respectively connected to the program controller signal. The first liquid level gauge is connected to the water pump linkage control through the program controller; the second liquid level gauge is connected to the water pump linkage control through the program controller.

3. A closed water ring vacuum pump system according to claim 2, characterized in that: The cooling tank is also provided with a water supply pipe and a water supply valve; the second liquid level meter is connected with the water supply valve through the program controller in linkage control.

4. A closed water ring vacuum pump system according to claim 2 or 3, characterized in that: A cooling coil and a temperature controller are installed in the cooling tank, and a cooling water flow regulating valve is installed on the cooling water inlet end of the cooling coil; the temperature controller is connected to the program controller by signal, and the temperature controller is connected to the cooling water flow regulating valve through a linkage control between the program controller and the cooling water flow regulating valve.

5. A closed water ring vacuum pump system according to claim 1, characterized in that: The height of the connecting end of the balance pipe and the oil-water stratification tank is lower than the height of the connecting end of the balance pipe and the water storage tank.

6. A closed water ring vacuum pump system according to claim 1, characterized in that: The closed water ring vacuum pump system also includes a tail gas treatment device, and the exhaust port of the gas-liquid separation tank is connected to the tail gas treatment device through a pipeline.

7. A closed water ring vacuum pump system according to claim 6, characterized in that: The top of the oil-water stratification tank is connected to the tail gas treatment device through a pipeline.

8. A closed water ring vacuum pump system according to claim 6, characterized in that: The top end of the water storage tank is connected to the tail gas treatment device through a pipeline.

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