Laboratory waste gas recovery treatment device

Abstract

The utility model discloses a laboratory waste gas recycling device which comprises a tail gas collecting tank, a tail gas absorbing and circulating tank, a spray tower, a photocatalytic plasma generator, an induced draft fan and an emptying pipe. The waste gas treatment device adopts vacuum negative pressure to recover waste gas and treats the waste gas through a spray adsorption and low-temperature plasma oxidation method, the spray tower is used for pretreatment to remove moisture, particulate matters and acid gases (H2S, SO2 and the like) in the waste gas, VOC (volatile organic compounds) in the waste gas is removed through the low-temperature plasma equipment, and meanwhile, sterilization can be performed to achieve the effects of deodorization and sterilization. The device is simple in structure and suitable for various on-site actual conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, in particular to a waste gas treatment device for laboratories and research and development centers. Background Art

[0002] Chemical, chemical, biological materials and other R&D centers and laboratories will generate a large amount of waste gas during the R&D and production process. It is a hazardous substance that cannot be directly discharged and needs to be recycled. There are many conventional methods for treating waste gas, generally including adsorption, catalytic combustion, absorption and ultraviolet photolysis. When designing the waste gas recovery and treatment device, it is necessary to consider the actual site conditions, emission standards and cost factors, and select appropriate treatment processes to ensure that the laboratory waste gas treatment meets the standards. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the utility model is to provide a laboratory waste gas recovery and treatment device.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a laboratory waste gas recovery and treatment device, including a tail gas collection tank, a tail gas absorption circulation tank, a spray tower, a photocatalytic plasma generator, an induced draft fan and an exhaust pipe,

[0005] The tail gas collection tank comprises a vacuum tank body, a vacuum pumping device connected to the vacuum tank body pipeline, and a plurality of negative pressure inhalation masks. The top of the vacuum tank body is also provided with a collection pipe, the collection pipe is connected to a three-way solenoid valve, and the two outlets of the three-way solenoid valve are respectively connected to the vacuum tank body and the tail gas absorption circulation tank; the collection pipe is provided with an airflow pressure stabilizing device;

[0006] The top of the tail gas absorption circulation tank is provided with an air inlet, an air outlet and a washing liquid reflux port, and the bottom of the tail gas absorption circulation tank is provided with a discharge port and a washing liquid outlet;

[0007] The spray tower comprises an air inlet and a washing liquid outlet at the bottom, and a spray device and an exhaust port at the top; the exhaust port of the tail gas absorption circulation tank is connected to the air inlet of the spray tower through a pipeline, the washing liquid outlet of the tail gas absorption circulation tank is connected to the spray device of the spray tower through a water pump, and the washing liquid outlet is connected to the washing liquid reflux port through a pipeline; the exhaust port of the spray tower is connected to the photocatalytic plasma generator, the induced draft fan and the exhaust pipe in sequence through the pipeline.

[0008] Preferably, the tail gas absorption circulation tank is further provided with an external circulation pipe, and the circulation pipe is provided with a solenoid valve.

[0009] Preferably, the connecting pipe between the three-way solenoid valve of the tail gas collection tank and the vacuum tank body is provided with a check valve and a sampling port.

[0010] Preferably, the air inlet of the spray tower is connected with a distributor.

[0011] Preferably, the low-salt wastewater collection pool is also provided with a domestic wastewater inlet pipe and an initial rainwater inlet pipe.

[0012] Beneficial effects: Compared with the prior art, the utility model adopts spraying and low-temperature plasma oxidation to treat waste gas, which is highly efficient and low in cost. The utility model designs a vacuum negative pressure tail gas collection tank and a tail gas absorption circulation tank to ensure tail gas collection and stable delivery, and ensures the removal of particulate matter and soluble components in the tail gas through circulating spray absorption, and removes VOC in the waste gas through low-temperature plasma equipment, and can sterilize at the same time, achieving the effect of deodorization and sterilization, and meeting emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the laboratory waste gas recovery and treatment device described in the present utility model.

[0014] Among them, there are tail gas collection tank 1, tail gas absorption circulation tank 2, spray tower 3, photocatalytic plasma generator 4, induced draft fan 5, exhaust pipe 6, vacuum equipment 7, three-way solenoid valve 8, air flow pressure stabilizing device 9, air inlet 10, air outlet 11, washing liquid reflux port 12, discharge port 13, washing liquid outlet 14, washing liquid outlet 15, spray device 16, exhaust port 17, check valve 18 and sampling port 19. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0016] A laboratory waste gas recovery and treatment device includes a tail gas collection tank, a tail gas absorption circulation tank, a spray tower, a photocatalytic plasma generator, an induced draft fan and an exhaust pipe.

[0017] The tail gas collection tank adopts a vertical vacuum tank body to facilitate space layout. A collection pipe is connected to the vacuum tank body, and several branch pipes are set up through the collection pipe to connect with the negative pressure suction mask pipes of each laboratory operation cabinet or operation table. The vacuum tank body is connected to the vacuum equipment to ensure the negative pressure state inside the tank body, and a pressure gauge is set on the top of the tank body. The extraction pipe on the top of the tank body ensures the constant pressure of the exhaust gas through the airflow pressure stabilizing device, and part of it is returned to the vacuum tank body through the three-way solenoid valve, and a check valve and a sampling port are set on the pipeline; the remaining part is sent to the tail gas absorption circulation tank.

[0018] The top of the tail gas absorption circulation tank is provided with an air inlet, an air outlet and a wash liquid reflux port, and the bottom of the tail gas absorption circulation tank is provided with a discharge port and a wash liquid outlet; the spray tower includes an air inlet and a wash liquid outlet at the bottom, and a spray device and an exhaust port at the top, and the exhaust port of the tail gas absorption circulation tank is connected to the air inlet of the spray tower through a pipeline. In this process, the tail gas absorption circulation tank plays a role of storage and buffering.

[0019] The gas outlet in the tail gas absorption circulation tank is connected to the distributor at the bottom of the spray tower to ensure the uniform distribution of the exhaust gas entering, and the washing liquid outlet is connected to the spray device of the spray tower through a water pump, and the washing liquid outlet is connected to the washing liquid reflux port through a pipeline, thereby forming a circulation.

[0020] Finally, the waste gas initially absorbed from the spray tower is sent into the photocatalytic plasma generator from the exhaust port under the action of the induced draft fan. The low-temperature plasma equipment removes VOCs in the waste gas and sterilizes it at the same time, achieving the effect of deodorization and sterilization. After meeting the emission standards, it is discharged through the exhaust pipe.

[0021] The utility model adopts vacuum negative pressure to recover waste gas, and treats waste gas by spray adsorption and low-temperature plasma oxidation. The spray tower is used as a pretreatment to remove moisture, particulate matter and acidic gases (H2S, SO2, etc.) in the waste gas, and then the VOC in the waste gas is removed by low-temperature plasma equipment. At the same time, it can sterilize to achieve the effect of deodorization and sterilization. The utility model has a simple structure and can recover washing liquid without power through a high-position spray tower, which is suitable for various actual on-site conditions.

Claims

1. A laboratory waste gas recovery and treatment device, characterized in that: It includes tail gas collection tank, tail gas absorption circulation tank, spray tower, photocatalytic plasma generator, induced draft fan and exhaust pipe. The tail gas collection tank comprises a vacuum tank body, a vacuum pumping device connected to the vacuum tank body pipeline, and a plurality of negative pressure inhalation masks. The top of the vacuum tank body is also provided with a collection pipe, the collection pipe is connected to a three-way solenoid valve, and the two outlets of the three-way solenoid valve are respectively connected to the vacuum tank body and the tail gas absorption circulation tank; the collection pipe is provided with an airflow pressure stabilizing device; The top of the tail gas absorption circulation tank is provided with an air inlet, an air outlet and a washing liquid reflux port, and the bottom of the tail gas absorption circulation tank is provided with a discharge port and a washing liquid outlet; The spray tower comprises an air inlet and a washing liquid outlet at the bottom, and a spray device and an exhaust port at the top; the exhaust port of the tail gas absorption circulation tank is connected to the air inlet of the spray tower through a pipeline, the washing liquid outlet of the tail gas absorption circulation tank is connected to the spray device of the spray tower through a water pump, and the washing liquid outlet is connected to the washing liquid reflux port through a pipeline; the exhaust port of the spray tower is connected to the photocatalytic plasma generator, the induced draft fan and the exhaust pipe in sequence through the pipeline.

2. The laboratory waste gas recovery and treatment device according to claim 1 is characterized in that: The tail gas absorption circulation tank is also provided with an external circulation pipe, and the circulation pipe is provided with a solenoid valve.

3. The laboratory waste gas recovery and treatment device according to claim 1 is characterized in that: The connecting pipe between the three-way solenoid valve of the tail gas collection tank and the vacuum tank body is provided with a check valve and a sampling port.

4. The laboratory waste gas recovery and treatment device according to claim 1 is characterized in that: The air inlet of the spray tower is connected with a distributor.

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