Explosion-proof device of waste gas treatment equipment

Abstract

The utility model discloses an explosion-proof device of waste gas treatment equipment, which comprises a waste gas conveying pipeline provided with a waste gas inlet and at least one gas outlet, and is characterized by further comprising a temperature detection device, a concentration detection device, a safety valve and a control device, the temperature detection device, the concentration detection device and the safety valve are respectively arranged on the waste gas conveying pipeline, and the detection ends of the temperature detection device and the concentration detection device are both located at the front part of the waste gas conveying pipeline; the signal output ends of the temperature detection device and the concentration detection device are electrically connected with the corresponding signal input ends of the control device respectively, and the signal input end of the safety valve is electrically connected with the signal output end of the control device. The explosion-proof device can detect the pipeline in real time, cut off waste gas conveying when the pipeline is abnormal, and effectively prevent fire and explosion.

Description

Technical Field

[0001] The utility model relates to waste gas treatment, in particular to an explosion-proof device of waste gas treatment equipment. Background Art

[0002] The current waste gas treatment equipment, especially the direct combustion equipment of organic waste gas, is suitable for the purification of harmful gases emitted by spraying, drying equipment and petrochemical industries. At the same time, it can also achieve the effect of waste heat recycling and energy saving by adding heat exchange equipment.

[0003] After the waste gas is discharged from the production equipment, it needs to be sent to the combustion chamber through the waste gas delivery pipe. However, during the combustion process, hot gas will flow back to the waste gas delivery pipe. The contact between hot gas and waste gas is prone to deflagration or even explosion, which will blow up the waste gas delivery pipe, which is very dangerous. Therefore, the current method is usually to cut off the waste gas delivery after delivering part of the waste gas, and continue to deliver the next part of the waste gas after the waste gas is burned. However, this method requires a purge after each combustion, which is not only time-consuming, but also has low waste gas combustion efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an explosion-proof device for waste gas treatment equipment, which can perform real-time detection on pipelines and cut off waste gas transportation in abnormal situations, thereby effectively preventing fire and explosion.

[0005] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0006] An explosion-proof device for waste gas treatment equipment comprises a waste gas conveying pipeline, the waste gas conveying pipeline is provided with a waste gas inlet and at least one outlet, and is characterized in that: it also comprises a temperature detection device, a concentration detection device, a safety valve and a control device, the temperature detection device, the concentration detection device and the safety valve are respectively arranged on the waste gas conveying pipeline, and the detection ends of the temperature detection device and the concentration detection device are both located at the front part of the waste gas conveying pipeline; the signal output ends of the temperature detection device and the concentration detection device are respectively electrically connected to the corresponding signal input ends of the control device, and the signal input end of the safety valve is electrically connected to the signal output end of the control device.

[0007] When the waste gas treatment equipment is in use, the waste gas is transported from the waste gas delivery pipe to the combustion chamber for combustion. At this time, the temperature detection device and the concentration detection device detect the temperature and concentration of the pipe. When hot gas backflow occurs in the combustion chamber, the temperature and concentration of the waste gas delivery pipe will increase and exceed the preset value. At this time, the control device controls the safety valve to close to prevent the backflowing hot gas from igniting the waste gas in transit and causing the pipe to explode. The use of this explosion-proof device does not require stopping the delivery of waste gas, and can continue to burn the waste gas. In addition, when hot gas backflow occurs, the waste gas delivery can be cut off in time to ensure personal and equipment safety.

[0008] The above control device generally adopts a microprocessor or a single-chip microcomputer.

[0009] In the preferred embodiment, the explosion-proof device further includes an emergency exhaust valve, and an emergency exhaust branch pipe is also provided on the waste gas delivery pipeline. The emergency exhaust branch pipe is located between the waste gas inlet of the waste gas delivery pipeline and the safety valve, and an emergency exhaust port is provided on the emergency exhaust branch pipe; the emergency exhaust valve is arranged on the emergency exhaust branch pipe. When the waste gas is normally transported for combustion, the emergency exhaust valve is in a closed state, and the waste gas can enter the combustion chamber from the waste gas inlet along the outlet; when the safety valve is closed, the emergency exhaust valve is opened at the same time, and the waste gas can enter the waste gas delivery pipeline from the waste gas inlet, and then be sent out from the emergency exhaust port through the emergency exhaust branch pipe, so as to avoid the continuous increase of the pressure in the waste gas delivery pipeline due to the continuous transportation of the waste gas. The emergency exhaust port can be connected to the waste gas delivery equipment to allow the waste gas to re-enter the circulation.

[0010] In the preferred embodiment, the explosion-proof device further includes a fresh air valve and a main fan. The waste gas delivery pipeline is further provided with a fresh air intake branch pipe, which is located between the waste gas inlet of the waste gas delivery pipeline and the safety valve. The fresh air intake branch pipe is provided with a fresh air inlet. The fresh air valve is arranged on the fresh air intake branch pipe. The main fan is arranged on the waste gas delivery pipeline and is located between the safety valve and the waste gas inlet of the waste gas delivery pipeline. Before the waste gas treatment equipment is ready to start, or after the safety valve is closed, the fresh air valve is opened, and the main fan extracts air through the fresh air intake branch pipe to purge the waste gas treatment equipment and the waste gas delivery pipeline, blow off the combustible gas in the entire system, and return the system to its initial state.

[0011] In a preferred embodiment, the concentration detection device adopts a LEL gas detector.

[0012] In a preferred embodiment, the temperature detection device and the concentration detection device are integrated together.

[0013] The beneficial effect of the utility model is that the explosion-proof device can perform real-time detection on the pipeline and cut off the exhaust gas transmission when an abnormality occurs, thereby effectively preventing fire and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the explosion-proof device in the embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the connection between the explosion-proof device and the combustion chamber in the embodiment of the utility model. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0017] like Figure 1-2 An explosion-proof device for an exhaust gas treatment equipment shown in the figure comprises an exhaust gas conveying pipeline 1, a temperature detection device 2, a concentration detection device 3, a safety valve 4 and a control device (not visible in the figure), the exhaust gas conveying pipeline 1 is provided with an exhaust gas inlet 101 and a plurality of outlets, the temperature detection device 2, the concentration detection device 3 and the safety valve 4 are respectively arranged on the exhaust gas conveying pipeline 1, the detection ends of the temperature detection device 2 and the concentration detection device 3 are both located at the front of the exhaust gas conveying pipeline 1, and the temperature detection device 2 and the concentration detection device 3 are integrated together; the signal output ends of the temperature detection device 2 and the concentration detection device 3 are respectively electrically connected to the corresponding signal input ends of the control device, and the signal input end of the safety valve 4 is electrically connected to the signal output end of the control device.

[0018] When the waste gas treatment equipment is in use, the waste gas is transported from the waste gas delivery pipe 1 to the combustion chamber 5 for combustion. At this time, the temperature detection device 2 and the concentration detection device 3 detect the temperature and concentration of the pipe. When hot gas backflow occurs in the combustion chamber 5, the temperature and concentration of the waste gas delivery pipe 1 will increase and exceed the preset value. At this time, the control device controls the safety valve 4 to close to prevent the backflowing hot gas from igniting the waste gas in transit and causing the pipe to explode. The use of this explosion-proof device does not require stopping the delivery of waste gas, and can continue to burn the waste gas. When hot gas backflow occurs, the waste gas delivery can be cut off in time to ensure personal and equipment safety.

[0019] The explosion-proof device also includes an emergency exhaust valve 6. An emergency exhaust branch pipe 102 is also provided on the waste gas delivery pipeline 1. The emergency exhaust branch pipe 102 is located between the waste gas inlet 101 of the waste gas delivery pipeline 1 and the safety valve 4. An emergency exhaust port 1021 is provided on the emergency exhaust branch pipe 102. The emergency exhaust valve 6 is arranged on the emergency exhaust branch pipe 102. When the waste gas is normally transported for combustion, the emergency exhaust valve 6 is in a closed state, and the waste gas can enter the combustion chamber 5 from the waste gas inlet 101 along the outlet; when the safety valve 4 is closed, the emergency exhaust valve 6 is opened at the same time, and the waste gas can enter the waste gas delivery pipeline 1 from the waste gas inlet 101, and then be sent out from the emergency exhaust port 1021 through the emergency exhaust branch pipe 102, so as to avoid the continuous increase of the pressure in the waste gas delivery pipeline 1 due to the continuous transportation of the waste gas. The emergency exhaust port 1021 can be connected with the waste gas delivery equipment to allow the waste gas to re-enter the circulation.

[0020] The explosion-proof device also includes a fresh air valve 7 and a main fan 8. A fresh air intake branch pipe 103 is also provided on the waste gas delivery pipeline 1. The fresh air intake branch pipe 103 is located between the waste gas inlet port 101 of the waste gas delivery pipeline 1 and the safety valve 4. A fresh air inlet port 1031 is provided on the fresh air intake branch pipe 103. The fresh air valve 7 is arranged on the fresh air intake branch pipe 103. The main fan 8 is arranged on the waste gas delivery pipeline 1 and is located between the safety valve 4 and the waste gas inlet port 101 of the waste gas delivery pipeline 1. Before the waste gas treatment equipment is ready to start, or after the safety valve 4 is closed, the fresh air valve 7 is opened, and the main fan 8 extracts air through the fresh air intake branch pipe 103, purges the waste gas treatment equipment and the waste gas delivery pipeline 1, blows away the combustible gas in the entire system, and returns the system to its initial state.

[0021] The concentration detection device 3 adopts a LEL gas detector.

[0022] The above control device generally adopts a microprocessor or a single-chip microcomputer.

Claims

1. An explosion-proof device for waste gas treatment equipment, comprising a waste gas delivery pipeline, the waste gas delivery pipeline being provided with a waste gas inlet and at least one outlet, characterized in that: It also includes a temperature detection device, a concentration detection device, a safety valve and a control device. The temperature detection device, the concentration detection device and the safety valve are respectively arranged on the exhaust gas conveying pipeline, and the detection ends of the temperature detection device and the concentration detection device are both located at the front part of the exhaust gas conveying pipeline; the signal output ends of the temperature detection device and the concentration detection device are respectively electrically connected to the corresponding signal input ends of the control device, and the signal input end of the safety valve is electrically connected to the signal output end of the control device.

2. The explosion-proof device of the exhaust gas treatment equipment according to claim 1, characterized in that: The explosion-proof device also includes an emergency exhaust valve. The exhaust gas conveying pipeline is also provided with an emergency exhaust branch pipe, which is located between the exhaust gas inlet of the exhaust gas conveying pipeline and the safety valve. The emergency exhaust branch pipe is provided with an emergency exhaust port; the emergency exhaust valve is arranged on the emergency exhaust branch pipe.

3. The explosion-proof device of the exhaust gas treatment equipment according to claim 1, characterized in that: The explosion-proof device also includes a fresh air valve and a main fan. A fresh air intake branch pipe is also provided on the exhaust gas conveying pipeline. The fresh air intake branch pipe is located between the exhaust gas inlet of the exhaust gas conveying pipeline and the safety valve. A fresh air inlet is provided on the fresh air intake branch pipe. The fresh air valve is arranged on the fresh air intake branch pipe. The main fan is arranged on the exhaust gas conveying pipeline and is located between the safety valve and the exhaust gas inlet of the exhaust gas conveying pipeline.

4. The explosion-proof device of the waste gas treatment equipment according to claim 1, characterized in that: The concentration detection device adopts a LEL gas detector.

5. The explosion-proof device of the waste gas treatment equipment according to claim 1, characterized in that: The temperature detection device and the concentration detection device are integrated together.

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