VOC waste gas treatment system

Abstract

The utility model relates to a VOC (volatile organic compound) waste gas treatment system which comprises a furnace body and a chimney, the furnace body is communicated with the chimney, a burner is mounted in the furnace body, the furnace body is connected with a plurality of waste gas storage tanks through pipelines, and a flow meter and a flow valve are connected onto the pipelines between the waste gas storage tanks and the furnace body. The other side of the furnace body is connected with a main fuel gas channel, the main fuel gas channel is connected with a pressure regulating valve for regulating the pressure of main fuel gas, the flow of the flow valve is controlled through the center console, accurate flow data are read from the flow meter, and the input amount of waste gas is accurately controlled through the flow meter and the flow valve; and meanwhile, the pressure regulating valve is arranged on the main gas channel, so that the gas pressure can be regulated to meet the combustion requirements of different amounts of waste gas, and the flexibility and the applicability of the system are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of waste gas treatment, specifically to a VOC waste gas treatment system. BACKGROUND

[0002] The waste gas treatment system is an integrated device specially designed for capturing, purifying and discharging harmful waste gas generated in industrial production or combustion process, which effectively removes pollutants in waste gas by physical, chemical or biological methods to ensure that waste gas meets environmental protection standards before discharge, protecting the atmospheric environment and human health.

[0003] The utility model discloses VOCs waste gas treatment technical field, concretely is VOCs waste gas treatment system, including furnace body, the furnace body passes through pipeline connection assembly square boundary area, is provided with cut -out valve, fire arrestor and main fan on the pipeline of connecting furnace body and assembly square boundary area, still including combustion -supporting fan, combustion -supporting fan passes through pipeline connection furnace body, the utility model has the advantages of: the furnace body passes through pipeline connection assembly square boundary area is set up, and cut -out valve, fire arrestor and main fan are provided on the pipeline of connecting furnace body and assembly square boundary area, effectively improve the purification efficiency, set up concentration detection device (LEL) through, guarantee safety distance, emergency emptying valve is installed in RTO gas cut -out valve before, hearth temperature and concentration detection device (LEL) interlocking emergency valve, cut -out valve and high temperature valve, guarantee equipment safe operation, the system waste gas, main combustion gas is directly connected into furnace body and carries out high -temperature treatment, but this kind of discharge without control can cause the insufficient combustion of gas in the furnace to cause the discharged VOC gas to be substandard, and the system lacks secondary treatment for the discharged VOC gas, therefore, the technology still has certain improvement space. SUMMARY

[0004] The utility model provides a VOC waste gas treatment system for solving the technical problem of the prior art.

[0005] To achieve the above object, the utility model provides the following technical scheme, a VOC waste gas treatment system, including furnace body, chimney, the furnace body is in communication with chimney, install burner in the furnace body, its characterized in that: the furnace body is connected with a plurality of waste gas storage tanks through pipeline, the pipeline between waste gas storage tank and furnace body is connected with flowmeter, flow valve and a plurality of pneumatic valve, the other side of furnace body is connected with main combustion gas passage, the main combustion gas passage is connected with electromagnetic valve and pressure regulating valve that adjusts main combustion gas pressure.

[0006] The technical scheme is adopted, the waste gas is connected with a plurality of waste gas storage tanks, a flow meter and a flow valve are connected on the pipeline between the waste gas storage tank and the furnace body, the flow of the flow valve is controlled by the central control console, and accurate flow data is read from the flow meter, the input amount of the waste gas is accurately controlled through the flow meter and the flow valve, the accurate control of the waste gas amount in the combustion process in the furnace body is ensured, a pressure regulating valve is arranged on the main gas passage, the gas pressure can be adjusted to meet the combustion demand of different waste gas amounts, the flexibility and applicability of the system are further improved, and the combustion of the gas and the waste gas in the furnace is promoted to be more sufficient through the control of the amounts of the gas and the waste gas in the furnace.

[0007] The VOC waste gas treatment system can be further provided with a smoke returning device arranged on one side of the furnace body, the smoke returning device comprises a preheater with one end communicated with the furnace body and the other end communicated with a chimney, the chimney is connected with a smoke returning pipeline, the other end of the smoke returning pipeline is connected with a disc valve, the other end of the disc valve is connected with a fan premixing box, the fan premixing box is connected with a fan, the fan is connected with the preheater through an air pipe, and the other side of the preheater is connected with a burner in the furnace body through a hot air pipe.

[0008] The technical scheme is adopted, the preheater is arranged on one side of the furnace body, the preheater can preheat the air entering the boiler to a certain temperature through the internal heat dissipation fins, the heat exchange performance of the boiler is improved, and the energy consumption is reduced, one end of the chimney is connected with the smoke returning pipeline, the other end of the smoke returning pipeline is provided with the fan, part of the VOC gas discharged into the chimney is sucked into the smoke returning pipeline through the fan, enters the fan premixing box through the disc valve with adjustable flow, the VOC gas in the fan premixing box is sucked into the air pipe by the fan and enters the preheater, the heat of the preheater is transmitted to the burner through the hot air pipe to be re-entered for secondary treatment, the waste gas is fully treated, and the waste gas treatment effect of the VOC waste gas treatment system is greatly improved.

[0009] The VOC waste gas treatment system can be further provided with a smoke returning device arranged on one side of the furnace body, the smoke returning device comprises a preheater with one end communicated with the furnace body and the other end communicated with a chimney, the chimney is connected with a smoke returning pipeline, the other end of the smoke returning pipeline is connected with a disc valve, the other end of the disc valve is connected with a fan premixing box, the fan premixing box is connected with a fan, the fan is connected with the preheater through an air pipe, and the other side of the preheater is connected with a burner in the furnace body through a hot air pipe.

[0010] The technical scheme is adopted, the preheater is arranged on one side of the furnace body, the preheater can preheat the air entering the boiler to a certain temperature through the internal heat dissipation fins, the heat exchange performance of the boiler is improved, and the energy consumption is reduced, one end of the chimney is connected with the smoke returning pipeline, the other end of the smoke returning pipeline is provided with the fan, part of the VOC gas discharged into the chimney is sucked into the smoke returning pipeline through the fan, enters the fan premixing box through the disc valve with adjustable flow, the VOC gas in the fan premixing box is sucked into the air pipe by the fan and enters the preheater, the heat of the preheater is transmitted to the burner through the hot air pipe to be re-entered for secondary treatment, the waste gas is fully treated, and the waste gas treatment effect of the VOC waste gas treatment system is greatly improved.

[0011] The VOC waste gas treatment system can be further provided with a smoke returning device arranged on one side of the furnace body, the smoke returning device comprises a preheater with one end communicated with the furnace body and the other end communicated with a chimney, the chimney is connected with a smoke returning pipeline, the other end of the smoke returning pipeline is connected with a disc valve, the other end of the disc valve is connected with a fan premixing box, the fan premixing box is connected with a fan, the fan is connected with the preheater through an air pipe, and the other side of the preheater is connected with a burner in the furnace body through a hot air pipe.

[0012] Adopting the technical scheme, the main gas passage and the pipeline between the waste gas storage tank and the furnace body are connected with a plurality of manual valves, the design of the manual valves enables an operator to flexibly control the flow of gas according to needs, facilitating the maintenance and overhaul of the system, when a part needs to be maintained or checked, the isolation of the part from other systems can be ensured by closing the corresponding manual valve, thereby improving the safety and maintenance convenience of the system.

[0013] The VOC waste gas treatment system can be further provided with the preheater including a gas inlet communicated with the furnace body and a gas outlet connected with the chimney, a back smoke gas inlet and a back smoke gas outlet communicated with each other are arranged on one side of the preheater and connected with the air pipe and the hot air pipe respectively, and the back smoke gas inlet and the back smoke gas outlet are communicated.

[0014] Adopting the technical scheme, the gas fully combusted in the furnace body enters the preheater through the gas inlet of the preheater, enters the chimney through the gas outlet of the preheater through heat exchange of the heat dissipation fins, and part of the gas in the chimney enters the back smoke gas inlet of the preheater through the back smoke pipeline of the fan to be heat exchanged and then enters the hot air pipe through the communicated back smoke gas outlet to be secondarily combusted in the burner, thereby improving the flowability of the furnace body.

[0015] The VOC waste gas treatment system can be further provided with the condenser pipes arranged on one side of the fan premixing box and one end of the hot air pipe close to the burner.

[0016] Adopting the technical scheme, the condenser pipes arranged on one side of the fan premixing box and one end of the hot air pipe close to the burner realize effective cooling of the high-temperature waste gas, which not only reduces the temperature of the waste gas, improves the safety and stability of the subsequent treatment process, but also helps to recover the heat in the waste gas.

[0017] The VOC waste gas treatment system can be further provided with the pressure high switch and the pressure low switch arranged on one side of the waste gas storage tank, the pneumatic valves provided with the pressure high switch and the pressure low switch arranged on the pipeline between the waste gas storage tank and the furnace body, and the diffuser valve arranged on the top of the waste gas storage tank.

[0018] The VOC waste gas treatment system automatically adjusts the waste gas pressure by installing a high pressure switch and a low pressure switch on one side of the waste gas storage tank and setting a pneumatic valve controlled by the switches on the pipeline between the waste gas storage tank and the furnace body, when the waste gas pressure exceeds the set range, the corresponding pneumatic valve is automatically opened or closed to adjust the waste gas flow, thereby improving the automation degree of the system, reducing the need for manual intervention, preventing equipment damage and safety accidents caused by abnormal pressure, and improving the reliability and efficiency of the entire waste gas treatment system.

[0019] The VOC waste gas treatment system can be further provided with an electromagnetic valve at the end of the main gas passage towards the burner.

[0020] The electromagnetic valve at the end of the main gas passage towards the burner can close the main gas passage and directly cut off the supply of main gas when the system receives an abnormal signal, thereby improving the safety of the system.

[0021] The utility model discloses the beneficial effects: through flowmeter and flow valve accurate control waste gas's input, ensure the accurate control of waste gas amount in the combustion process of road body, and the pressure regulating valve can be arranged on the main gas passage to adjust the gas pressure to meet the combustion demand of different waste gas amount, further improve the flexibility and applicability of the system, and the amount of furnace gas and waste gas is controlled to make the combustion of gas and waste gas in the furnace more sufficient. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the system schematic diagram of the utility model;

[0023] Figure 2 It is the burner start simple flow chart of the utility model;

[0024] Label annotation: 1-inlet, 2-outlet, 3-back smoke inlet, 4-back smoke outlet. DETAILED DESCRIPTION

[0025] The specific embodiment is only the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification without creative contribution according to the need after reading the present specification, but as long as it is in the right claim range of the utility model, it is protected by the patent law.

[0026] The utility model provides VOC waste gas treatment system, can carry out real time monitoring to each item data of system through PLC and central control, and has each protective measure before system starts, please refer to Figure 1, the VOC system comprises a furnace body, a chimney, the furnace body is in communication with the chimney, a burner is installed in the furnace body, the furnace body is connected with a plurality of waste gas storage tanks through pipelines, a flow meter, a flow valve and a plurality of pneumatic valves are connected on the pipelines between the waste gas storage tanks and the furnace body, a main fuel gas passage is connected to the other side of the furnace body, the main fuel gas passage is connected with a solenoid valve and a pressure regulating valve for regulating the pressure of the main fuel gas, the external waste gas pipeline is connected with the plurality of waste gas storage tanks, so that the waste gas is stored in the plurality of waste gas storage tanks, the flow meter and the flow valve are connected on the pipelines between the waste gas storage tanks and the furnace body, the flow of the flow valve is controlled by the central control console, and accurate flow data is read from the flow meter, the input amount of the waste gas is accurately controlled through the flow meter and the flow valve, the accurate control of the amount of waste gas in the combustion process in the furnace body is ensured, and meanwhile, the pressure regulating valve is arranged on the main fuel gas passage, so that the pressure of the fuel gas can be adjusted to meet the combustion demand of different amounts of waste gas, the flexibility and applicability of the system are further improved, and meanwhile, the amount of fuel gas and waste gas in the furnace is controlled, so that the fuel gas and the waste gas are more fully combusted in the furnace.

[0027] The system further comprises a back smoke device arranged on one side of the furnace body, the back smoke device comprises a preheater with one end in communication with the furnace body and the other end in communication with the chimney, the chimney is connected with a back smoke pipeline, the back smoke pipeline extends into the chimney by one third, the other end of the back smoke pipeline is connected with a disc valve, the other end of the disc valve is connected with a fan premixing box, the fan premixing box is connected with a fan, the fan is connected with the preheater on one side through an air pipe, and the other side of the preheater is connected with the burner in the furnace body through a hot air pipe, the preheater is arranged on one side of the furnace body, the preheater can preheat the air entering the boiler to a certain temperature through the internal heat radiating fins, the heat exchange performance of the boiler is improved, and the energy consumption is reduced, meanwhile, one end of the chimney is connected with the back smoke pipeline, the other end of the back smoke pipeline is provided with the fan, part of the VOC gas discharged into the chimney is sucked into the back smoke pipeline through the fan, enters the fan premixing box through the disc valve with adjustable flow, and the VOC gas in the fan premixing box is sucked into the air pipe by the fan, enters the preheater, and the heat of the preheater is transmitted to the VOC gas re-entering the burner through the hot air pipe for secondary treatment.

[0028] The system further comprises that a plurality of fire arresters are arranged on the pipelines between the furnace body and the waste gas storage tanks, and an expansion joint is arranged at the end of the gas inlet end of the main fuel gas passage, the plurality of fire arresters arranged on the pipelines between the furnace body and the waste gas storage tanks can effectively prevent the flame from spreading through the pipelines, meanwhile, the expansion joint arranged at the end of the gas inlet end of the main fuel gas passage can absorb the thermal expansion and contraction of the pipelines caused by temperature change, so as to ensure the tightness and stability of the pipeline connection, and further improve the reliability and safety of the system.

[0029] The preheater comprises an air inlet communicated with the furnace body and an air outlet connected with the chimney, a back smoke air inlet installed with the air pipe and a back smoke air outlet installed with the hot air pipe are arranged on the side of the preheater communicated with the air inlet and the air outlet, the back smoke air inlet is communicated with the back smoke air outlet, the gas fully combusted in the furnace body enters the preheater through the air inlet of the preheater, enters the chimney through the air outlet by heat exchange of the heat exchange fins of the preheater, and part of the gas in the chimney enters the back smoke air inlet of the preheater through the back smoke pipeline by the fan to be heat exchanged and then enters the hot air pipeline through the communicated back smoke air outlet to be secondarily combusted in the burner, thereby improving the flowability of the furnace body.

[0030] The condenser pipes are arranged on the side of the fan premixing box and the end of the hot air pipe close to the burner, the high-temperature waste gas is effectively cooled by arranging the condenser pipes on the side of the fan premixing box and the end of the hot air pipe close to the burner, the temperature of the waste gas is reduced, the safety and stability of the subsequent treatment process are improved, and the heat in the waste gas is recovered.

[0031] Please refer to Figure 2 , the VOC system is provided with various safety detections, the VOC system further comprises a plurality of manual valves connected on the pipeline between the main gas passage and the waste gas storage tank and the furnace body, a high-pressure switch and a low-pressure switch are installed on the side of the waste gas storage tank, a pneumatic valve provided with the high-pressure switch and the low-pressure switch is arranged on the pipeline between the waste gas storage tank and the furnace body, and an electromagnetic valve is arranged at the end of the main gas passage close to the burner.

[0032] 1. Waste gas opening condition:

[0033] Normal combustion of the burner

[0034] External manual permission to release

[0035] Waste gas pressure greater than the minimum set point

[0036] Waste gas pipeline leak detection passed

[0037] 2. Waste gas cut-off condition:

[0038] Burner shutdown

[0039] External manual permission to disconnect

[0040] Waste gas pressure less than the minimum set point

[0041] 3. Description when a fault occurs:

[0042] When the burner alarm is locked, a passive contact alarm signal is output, the gas valve and the waste gas valve are closed, and the fan stops working.

[0043] When a waste gas leak detection fault occurs, a passive contact alarm signal is output, and the waste gas is not put into.

[0044] 4. Use of the tank bleeder valve:

[0045] The system opens the bleeder valve in combination with the current tank pressure limit when receiving a signal of the burner alarm or the off-gas leak detection alarm.

[0046] 5. Post-shutdown purge:

[0047] At this time, the burner gas valve and off-gas valve are cut off, and the fan purges to empty the furnace of any combustible gases that may be present.

[0048] The utility model discloses a beneficial effect: through flowmeter and flow valve accurate control the input of off -gas, ensured the accurate control of the waste gas amount in the combustion process of road body, and the pressure regulating valve is established on main gas passage simultaneously, can adjust gas pressure to satisfy the combustion demand of different off -gas amount, further promoted the flexibility and applicability of system, and through the amount of furnace gas and off -gas control prompted gas and off -gas to burn more fully in the furnace.

Claims

1. A VOC exhaust gas treatment system, comprising a furnace body and a chimney, wherein the furnace body and the chimney are in communication, and a burner is installed inside the furnace body, characterized in that: The furnace body is connected to several waste gas storage tanks via pipes. A flow meter and a flow valve are connected to the pipes between the waste gas storage tanks and the furnace body. A main gas passage is connected to the other side of the furnace body, and a pressure regulating valve is connected to the main gas passage to adjust the pressure of the main gas.

2. The VOC waste gas treatment system according to claim 1, characterized in that: It also includes a flue gas return device located on one side of the furnace body. The flue gas return device includes a preheater with one end connected to the furnace body and the other end connected to the chimney. The chimney is connected to a flue gas return pipe. The other end of the flue gas return pipe is connected to a butterfly valve. The other end of the butterfly valve is connected to a fan premix box. The fan premix box is connected to a fan. The fan is connected to one side of the preheater through an air duct. The other side of the preheater is connected to a burner inside the furnace body through a hot air duct.

3. The VOC waste gas treatment system according to claim 2, characterized in that: Several flame arresters are installed on the pipeline between the furnace body and the waste gas storage tank, and an expansion joint is installed at the end of the main gas inlet.

4. The VOC waste gas treatment system according to claim 3, characterized in that: Several manual valves are connected to the main gas passage and the pipeline between the waste gas storage tank and the furnace body.

5. A VOC exhaust gas treatment system according to claim 3, characterized in that: The preheater includes an air inlet communicating with the furnace body and an air outlet connected to the chimney. The air inlet and the air outlet are connected. One side of the preheater is provided with a flue gas inlet installed with an air duct and a flue gas outlet installed with a hot air duct. The flue gas inlet and the flue gas outlet are connected.

6. A VOC waste gas treatment system according to claim 2, characterized in that: The fan premix box has a condenser pipe on one side and the hot air pipe near the burner.

7. A VOC exhaust gas treatment system according to any one of claims 1-5, characterized in that: A high-pressure switch and a low-pressure switch are installed on one side of the waste gas storage tank, and a pneumatic valve with a high-pressure switch and a low-pressure switch is installed on the pipeline between the waste gas storage tank and the furnace body.

8. A VOC exhaust gas treatment system according to any one of claims 1-5, characterized in that: The main gas passage is equipped with a solenoid valve at the end facing the burner.

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