VOC (volatile organic compound) treatment technical device based on microwave heating and nano manganese oxide catalytic oxidation

Abstract

The utility model provides a VOC (volatile organic compound) treatment technical device based on microwave heating and nano manganese oxide catalytic oxidation, which relates to the technical field of environmental protection equipment and comprises an air pipe. A microwave heater, a catalyst module and a gas-gas heat exchanger are sequentially connected to the air pipe in the gas flowing direction, the front end of the air pipe is connected with the gas-gas heat exchanger, and a honeycomb ceramic heat accumulator is arranged in the microwave heater; a microwave heater, a honeycomb ceramic heat accumulator, a catalyst module and a gas-gas heat exchanger are combined, so that a complete VOC treatment system is formed, the honeycomb ceramic heat accumulator is directly heated through microwaves, VOC gas can be rapidly heated, the heating efficiency is improved, it is ensured that the VOC gas reaches the optimal reaction temperature before entering a catalyst, and the VOC treatment effect is improved. Therefore, the activity of the nano manganese oxide catalyst in the catalyst module can be fully exerted, and the removal efficiency of the VOC gas is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection equipment technical field, concretely is a kind of based on microwave heating nanometer manganese oxide catalytic oxidation VOC processing technical device. BACKGROUND

[0002] Volatile organic compounds (VOC) are pollutants generated in many industrial processes, which are toxic and pose a threat to the environment and human health. Existing VOC treatment technologies include adsorption, condensation, catalytic combustion and direct thermal oxidation. However, these traditional methods have some shortcomings.

[0003] Although adsorption can effectively remove VOC, it is complex to operate, and the waste adsorbent generated after treatment needs to be treated, which increases the risk of secondary pollution and treatment cost; Condensation is suitable for high-concentration VOC, but the treatment effect of low-concentration VOC is not ideal, the energy consumption is high, and the equipment is complex; Catalytic combustion method reduces the combustion temperature through catalyst to realize the decomposition of VOC, but the catalyst is easy to fail, and needs to be replaced or regenerated frequently; Direct thermal oxidation method realizes VOC decomposition by direct combustion, and the treatment effect is good, but it needs high temperature condition, and the energy consumption is extremely high. SUMMARY

[0004] The utility model aims at providing a kind of based on microwave heating nanometer manganese oxide catalytic oxidation VOC processing technical device, to solve the problems existing in adsorption, condensation, catalytic combustion and direct oxidation method.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a kind of based on microwave heating nanometer manganese oxide catalytic oxidation VOC processing technical device, including wind pipe, the wind pipe is sequentially connected with microwave heater, catalyst module and gas-gas heat exchanger along the direction of gas flow, the front end of the wind pipe is connected with gas-gas heat exchanger, the inside of the microwave heater is provided with honeycomb ceramic regenerator, the gas-gas heat exchanger is provided with gas inlet, the gas-gas heat exchanger is connected with exhaust assembly.

[0006] Preferably, the exhaust assembly includes an air outlet pipe connected to the gas-gas heat exchanger, an exhaust fan connected to the end of the air outlet pipe, a conveying pipe connected to the exhaust fan, and a discharge pipe connected to the end of the conveying pipe.

[0007] Preferably, the carrier of the catalyst module is ceramic, and the catalyst used in the catalyst module is nanometer manganese oxide catalyst, which is uniformly coated on the surface of the ceramic carrier by impregnation method.

[0008] Preferably, the material of the honeycomb ceramic regenerator is alumina ceramic.

[0009] Preferably, the microwave heater, catalyst module and gas-gas heat exchanger are provided with sealing elements at the connection with the air duct.

[0010] Preferably, the gas-gas heat exchanger is made of stainless steel and has a compact design.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] 1. The microwave heater, honeycomb ceramic heat storage body, catalyst module and gas-gas heat exchanger are combined to form a complete VOC treatment system, the VOC gas can be quickly heated by directly heating the honeycomb ceramic heat storage body with the microwave, the heating efficiency is improved, the VOC gas can reach the optimal reaction temperature before entering the catalyst, the activity of the nano manganese oxide catalyst in the catalyst module can be fully utilized, and the removal efficiency of the VOC gas is significantly improved.

[0013] 2. The gas-gas heat exchanger is used to recover the waste heat of the high-temperature gas after treatment, and the waste heat is used to preheat the untreated VOC gas entering the gas-gas heat exchanger, so that the subsequent VOC gas can be heated faster, the overall energy consumption of the device is effectively reduced by the design of the gas-gas heat exchanger, the utilization rate of heat energy is improved, and the energy-saving advantage is embodied. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a structural schematic view of the present application.

[0015] In the figure: 10, air duct; 20, microwave heater; 30, catalyst module; 40, gas-gas heat exchanger; 50, gas inlet; 60, exhaust assembly; 61, gas outlet pipe; 62, exhaust fan; 63, conveying pipe; 64, discharge pipe. DETAILED DESCRIPTION

[0016] The present application will be further described below with reference to the accompanying drawings.

[0017] As Figure 1As shown, a kind of microwave heating nanometer manganese oxide catalytic oxidation VOC processing technology device, it includes air pipe 10, air pipe 10 is connected with microwave heater 20, catalyst module 30 and gas-gas heat exchanger 40 in turn along the direction of gas flow, catalyst module 30 is located in the middle position of gas-gas heat exchanger 40, the front end of air pipe 10 is connected with gas-gas heat exchanger 40, the inside of microwave heater 20 is provided with honeycomb ceramic regenerator, microwave heater 20 uses microwave heating technology to rapidly heat honeycomb ceramic regenerator, so that VOC gas quickly reaches the temperature required for reaction, and the microwave power of microwave heater 20 can be set, so that the temperature of the surface of honeycomb ceramic regenerator is stabilized in the set range, gas-gas heat exchanger 40 is provided with gas inlet 50, gas-gas heat exchanger 40 is connected with exhaust assembly 60, in the process of use, sensor can be installed on air pipe 10 to monitor the temperature and flow information of VOC gas, so as to ensure that the processing condition of VOC gas is in the best state.

[0018] Exhaust assembly 60 includes gas outlet pipe 61 connected with gas-gas heat exchanger 40, exhaust fan 62 is connected to the end of gas outlet pipe 61, conveying pipe 63 is connected to exhaust fan 62, discharge pipe 64 is connected to the end of conveying pipe 63, the top end direction of conveying pipe 63 is inclined upward, the direction of discharge pipe 64 is vertically upward, so that the gas can be quickly discharged to the outside through conveying pipe 63 and discharge pipe 64, and gas detection structure can be provided on discharge pipe 64, to detect whether the gas concentration discharged by discharge pipe 64 is qualified.

[0019] The carrier of catalyst module 30 is ceramic, and the thermal stability and heat resistance of the ceramic carrier are good, thereby ensuring the stability of catalyst module 30 during work, the catalyst used in catalyst module 30 is nanometer manganese oxide catalyst, which is uniformly coated on the surface of the ceramic carrier by impregnation method, the nanometer manganese oxide catalyst can realize efficient VOC gas decomposition reaction at a lower temperature, has good heat resistance and long service life, and the nanometer manganese oxide catalyst uniformly coated on the surface of the ceramic carrier can uniformly and better process VOC.

[0020] The material of honeycomb ceramic regenerator is alumina ceramic, which has high specific heat capacity and high temperature resistance, so that the honeycomb ceramic regenerator has strong heat absorption and heat release capacity.

[0021] Sealing elements are arranged at the connection positions of microwave heater 20, catalyst module 30 and gas-gas heat exchanger 40 and air pipe 10, so that the device has good sealing performance during gas conveying, to avoid gas leakage, thereby ensuring smooth gas flow path.

[0022] The material of the gas-gas heat exchanger 40 is stainless steel, the gas-gas heat exchanger 40 is compact in design, which can improve the efficiency of heat transfer, and greatly avoid the case of heat loss.

[0023] The working principle is as follows:

[0024] First, turn on the microwave heater 20 to preheat the honeycomb ceramic heat accumulator, then make the VOC gas enter from the gas inlet 50, and start the air extractor 62, the VOC gas enters the inside of the air pipe 10 through the gas-gas heat exchanger 40, the VOC gas entering the inside of the air pipe 10 is first heated by the microwave heater 20 and the honeycomb ceramic heat accumulator, the heated VOC gas will enter the inside of the catalyst module 30, and the VOC gas is oxidized and decomposed by the nano manganese oxide catalyst on the catalyst module 30, the treated VOC gas enters the gas-gas heat exchanger 40 to preheat the gas entering the inside of the gas-gas heat exchanger 40 from the gas inlet 50, and finally the treated VOC gas is discharged through the gas outlet pipe 61, the conveying pipe 63 and the discharge pipe 64, and the treatment operation of the VOC gas is completed.

[0025] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A device based on microwave heating nanometer manganese oxide catalytic oxidation VOC treatment technology, characterized in that: The application relates to a wind pipe (10) which is sequentially connected with a microwave heater (20), a catalyst module (30) and a gas-gas heat exchanger (40) in the direction of gas flow, the front end of the wind pipe (10) is connected with the gas-gas heat exchanger (40), the microwave heater (20) is internally provided with honeycomb ceramic heat storage bodies, the gas-gas heat exchanger (40) is provided with a gas inlet (50), and the gas-gas heat exchanger (40) is connected with an exhaust assembly (60).

2. The device for treating VOCs by catalytic oxidation based on microwave heating of nanoscale manganese oxides according to claim 1, characterized in that: The exhaust assembly (60) comprises an air outlet pipe (61) connected with the gas-gas heat exchanger (40), the end of the air outlet pipe (61) is connected with an air exhaust fan (62), the air exhaust fan (62) is connected with a conveying pipe (63), and the end of the conveying pipe (63) is connected with a discharge pipe (64).

3. The device for treating VOCs by catalytic oxidation based on microwave heating of nanoscale manganese oxides according to claim 2, characterized in that: The carrier of the catalyst module is ceramic, the catalyst used by the catalyst module is a nano manganese oxide catalyst, and the nano manganese oxide catalyst is uniformly coated on the surface of the ceramic carrier through an impregnation method.

4. The device for treating VOCs by catalytic oxidation based on microwave heating of nanoscale manganese oxides according to claim 2, characterized in that: The material of the honeycomb ceramic heat storage bodies is alumina ceramic.

5. The device for treating VOCs by catalytic oxidation based on microwave heating of nanoscale manganese oxides according to claim 4, characterized in that: The microwave heater (20), the catalyst module (30) and the gas-gas heat exchanger (40) are provided with sealing elements at the connecting positions with the wind pipe (10).

6. The device for treating VOCs by catalytic oxidation based on microwave heating of nanoscale manganese oxides according to claim 5, characterized in that: The material of the gas-gas heat exchanger (40) is stainless steel, and the gas-gas heat exchanger (40) is designed in a compact type.

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