Efficient treatment system for catalytic combustion treatment of VOCs-containing waste gas by microwave heating

Abstract

The invention provides an efficient treatment system for catalytic combustion treatment of VOCs-containing waste gas by microwave heating, which comprises an air inlet pipeline used for conveying the VOCs-containing waste gas; the exhaust funnel is used for exhausting clean gas; an adsorbent for absorbing VOCs (volatile organic compounds) in the waste gas is mounted in the adsorption box; the microwave heating catalytic combustion device is used for removing VOCs (Volatile Organic Compounds); one end of the concentrated waste gas inlet pipe is fixedly mounted on the adsorption box; the efficient and rapid heating process is provided through the microwave heating technology, the energy utilization efficiency is greatly improved, heat loss of a traditional heating mode is avoided, and the microwave heating catalytic combustion device has the advantage of efficient energy utilization, is compact in structure and small in occupied area, can reduce energy consumption by accurately controlling the temperature and has the beneficial effects of being environmentally friendly and energy-saving. The device has the advantages of saving space and reducing energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of VOCs-containing waste gas treatment technology, specifically relating to a high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion. Background Technology

[0002] With the advancement of industrialization, the emission of volatile organic compounds (VOCs) has gradually attracted global attention in environmental protection. VOCs not only cause serious pollution to the atmospheric environment, but also, through chemical reactions with air pollutants such as ozone and fine particulate matter (PM2.5), further aggravate air pollution and pose a great threat to human health.

[0003] Currently, VOCs treatment technologies mainly include adsorption, catalysis, and combustion. Adsorption uses adsorbent materials (such as activated carbon and zeolite molecular sieves) to capture VOCs, thereby reducing emissions. Catalysis uses catalysts to promote the oxidation and decomposition of VOCs, converting them into harmless substances. Combustion incinerates VOCs at high temperatures to purify the air. However, these methods still have some drawbacks: Limitations of adsorption: Adsorption uses solid adsorbent materials to adsorb VOCs, but when the adsorbent is saturated, it needs to be regenerated. Traditional regeneration methods, such as thermal regeneration, have problems such as high energy consumption and complex operation. Especially when treating high concentrations of VOCs, the regeneration effect of the adsorbent is poor, resulting in reduced treatment efficiency and increased operating costs. The high energy consumption problem of catalytic methods: Catalytic methods decompose VOCs into harmless substances through the action of catalysts, but the activity of catalysts is greatly affected by temperature and environment. Under low temperature conditions, the catalytic efficiency is low, which leads to the need to heat the reaction system, thereby increasing energy consumption. High energy consumption and equipment complexity: Traditional VOCs treatment equipment consumes a lot of energy during operation, especially in heating and temperature control, resulting in low overall energy efficiency. In addition, the complex structure and high operating cost of the equipment limit its promotion in practical applications. Poor treatment effect on low concentration VOCs: Existing VOCs treatment technologies often show low treatment efficiency when treating low concentration VOCs, especially catalytic and combustion methods. These technologies usually require high temperatures or long reaction times, resulting in low treatment efficiency and may even fail to meet emission standards. Limitations of the combustion method: While combustion can efficiently decompose VOCs, the process typically requires high temperatures, resulting in significant energy consumption and potentially generating new pollutants (such as NOx and CO). Furthermore, high-temperature operation increases equipment maintenance costs and safety hazards.

[0004] In summary, existing VOCs treatment technologies have certain shortcomings in adsorption, catalysis, and combustion, such as low energy efficiency. Summary of the Invention

[0005] (1) Technical problems to be solved In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-efficiency treatment system for treating VOCs-containing waste gas by using microwave heating for catalytic combustion, aiming to solve the defects of existing VOCs treatment technologies in terms of adsorption, catalysis and combustion.

[0006] (2) Technical solution To address the aforementioned technical problems, this invention provides a highly efficient treatment system for VOC-containing waste gas using microwave heating and catalytic combustion, comprising: an inlet duct for conveying VOC-containing waste gas; an exhaust stack for discharging clean gas; an adsorption box containing an adsorbent for absorbing VOC components in the waste gas; a microwave-heated catalytic combustion device for removing VOCs; a concentrated waste gas inlet duct, one end of which is fixedly installed in the adsorption box, and the other end of which is fixedly installed in the inlet of the microwave-heated catalytic combustion device; a connecting pipe and a desorption fan, the desorption fan being installed between the microwave-heated catalytic combustion device and the connecting pipe.

[0007] As a further step, an adsorption fan and an exhaust pipe are installed between the adsorption box and the exhaust stack. One end of the exhaust pipe is fixedly installed in the adsorption box, the other end of the exhaust pipe is fixedly installed in the inlet of the adsorption fan, and the outlet of the adsorption fan is fixedly installed in the exhaust stack.

[0008] As a further step, the outlet of the air inlet pipe is fixedly installed on the adsorption box, and a first adsorption valve is fixedly installed at the outlet of the air inlet pipe, and a second adsorption valve is also installed at one end of the air outlet pipe.

[0009] As a further step, a first desorption valve is also installed at one end of the concentrated waste gas inlet pipe.

[0010] As a further step, the microwave-heated catalytic combustion device includes an outer casing, a heat exchanger fixedly installed in the lower part of the inner cavity of the outer casing, a catalytic reaction chamber fixedly installed in the upper part of the inner cavity of the outer casing, a catalyst fixedly installed in the catalytic reaction chamber, the temperature in the catalytic reaction chamber being monitored in real time by a temperature detection instrument, heat insulation cotton for heat insulation fixedly installed inside the outer casing, a magnetically controlled heating tube fixedly installed at the upper end of the inner cavity of the outer casing, and a venting valve installed at the middle position of the top of the outer casing.

[0011] As a further step, the inlet of the desorption fan is fixedly installed at the outlet of the microwave-heated catalytic combustion device, the outlet of the desorption fan is fixedly installed at one end of the connecting pipe, and the other end of the connecting pipe is fixedly installed at the adsorption box.

[0012] As a further step, a discharge pipe is fixedly installed between the connecting pipe and the exhaust stack. The inlet of the discharge pipe is connected to the connecting pipe, the outlet of the discharge pipe is connected to the exhaust stack, and a discharge valve is installed at the inlet of the discharge pipe.

[0013] As a further step, a second desorption valve is installed at the other end of the connecting pipe, a reuse valve is installed on the connecting pipe, a replenishment air inlet is opened on the connecting pipe, and a replenishment valve is installed at the replenishment air inlet.

[0014] As a further step, a flame arrester is fixedly installed inside the other end of the concentrated exhaust gas inlet pipe.

[0015] Furthermore, it also includes an automated control system that can automatically monitor and adjust various operating parameters of the equipment, including temperature, air volume, microwave heating power, etc.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention provides an efficient and rapid heating process through microwave heating technology, which greatly improves energy utilization efficiency, avoids heat loss in traditional heating methods, and has the advantage of efficient energy utilization. (2) The microwave heating catalytic combustion device of the present invention has a compact structure, occupies a small area, and can reduce energy consumption by precisely controlling the temperature, thus having the advantages of saving space and reducing energy consumption. (3) The present invention can adaptively adjust process parameters according to actual operating conditions, achieve efficient and stable operation, reduce manual intervention, improve the automation level of the system, and has the advantages of adaptive adjustment and automation. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a side view schematic diagram of the present invention; Figure 4 This is a schematic diagram of the internal structure of the microwave-heated catalytic combustion device of the present invention; Figure 5 This is a schematic diagram of the adsorption / desorption process of the present invention; The labels in the attached diagram are as follows: 1. Air inlet duct; 2. Exhaust stack; 3. Adsorption box; 4. Microwave-heated catalytic combustion device; 5. Concentrated waste gas inlet duct; 6. Connecting pipe; 7. Adsorption fan; 8. Exhaust pipe; 9. Desorption fan; 10. Discharge pipe; 101. First adsorption valve; 401. Outer casing; 402. Heat exchanger; 403. Catalyst; 404. Insulation cotton; 405. Magnetically controlled heating tube; 406. Explosion relief valve; 501. First desorption valve; 502. Flame arrester; 601. Second desorption valve; 602. Reuse valve; 603. Cooling valve; 801. Second adsorption valve; 1001. Discharge valve. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] This specific embodiment is a high-efficiency treatment system for treating VOCs-containing waste gas using microwave heating and catalytic combustion, as shown in the schematic diagram below. Figures 1-5 As shown, the device includes an air inlet duct 1, an exhaust stack 2, an adsorption box 3, a microwave-heated catalytic combustion device 4, a concentrated waste gas inlet duct 5, a connecting pipe 6, and a desorption fan 9. The air inlet duct 1 is used to transport waste gas containing VOCs, the exhaust stack 2 is used to discharge clean gas, the adsorption box 3 is equipped with an adsorbent for absorbing VOCs components in the waste gas, the microwave-heated catalytic combustion device 4 is used to remove VOCs, one end of the concentrated waste gas inlet duct 5 is fixedly installed in the adsorption box 3, and the other end of the concentrated waste gas inlet duct 5 is fixedly installed in the inlet of the microwave-heated catalytic combustion device 4, and the desorption fan 9 is installed between the microwave-heated catalytic combustion device 4 and the connecting pipe 6.

[0021] The outlet of the air inlet duct 1 is fixedly installed on the adsorption box 3, and the outlet of the air inlet duct 1 is fixedly installed with a first adsorption valve 101. A second adsorption valve 801 is also installed at one end of the air outlet pipe 8. An adsorption fan 7 and an air outlet pipe 8 are installed between the adsorption box 3 and the exhaust stack 2. One end of the air outlet pipe 8 is fixedly installed on the adsorption box 3, and the other end of the air outlet pipe 8 is fixedly installed on the inlet of the adsorption fan 7. The outlet of the adsorption fan 7 is fixedly installed on the exhaust stack 2.

[0022] The adsorption box 3 can adsorb and treat VOC-containing waste gas. The specific process is as follows: Open the first adsorption valve 101 and the second adsorption valve 801 (close other valves), start the adsorption fan 7, and through the suction action of the adsorption fan 7, the VOCs-containing waste gas enters the adsorption box 3 filled with adsorbent from the air inlet pipe 1. The adsorbent absorbs the VOCs components of the waste gas, and after effectively removing VOCs, the clean gas is discharged through the exhaust pipe 2.

[0023] One end of the concentrated waste gas inlet pipe 5 is also equipped with a first desorption valve 501, and the other end of the concentrated waste gas inlet pipe 5 is fixedly equipped with a flame arrester 502.

[0024] The microwave-heated catalytic combustion device 4 includes an outer casing 401. A heat exchanger 402 is fixedly installed in the lower part of the inner cavity of the outer casing 401. The upper part of the inner cavity of the outer casing 401 is a catalytic reaction chamber, and a catalyst 403 is fixedly installed in the catalytic reaction chamber. The temperature in the catalytic reaction chamber is monitored in real time by a temperature detection instrument. Heat insulation cotton 404 for heat insulation is fixedly installed inside the outer casing 401. A magnetic heating tube 405 is fixedly installed at the upper end of the inner cavity of the outer casing 401. A relief valve 406 is installed at the middle position of the top of the outer casing 401.

[0025] The inlet of the desorption fan 9 is fixedly installed at the outlet of the microwave heating catalytic combustion device 4, and the outlet of the desorption fan 9 is fixedly installed at one end of the connecting pipe 6. The other end of the connecting pipe 6 is fixedly installed at the adsorption box 3.

[0026] A discharge pipe 10 is fixedly installed between the connecting pipe 6 and the exhaust pipe 2. The inlet of the discharge pipe 10 is connected to the connecting pipe 6, and the outlet of the discharge pipe 10 is connected to the exhaust pipe 2. A discharge valve 1001 is installed at the inlet of the discharge pipe 10.

[0027] A second desorption valve 601 is installed at the other end of the connecting pipe 6, and a reuse valve 602 is installed on the connecting pipe 6; A cooling air inlet is provided on the connecting pipe 6, and a cooling air valve 603 is installed at the cooling air inlet.

[0028] When the adsorbent in the adsorption box 3 is close to saturation with VOCs, VOCs desorption is required. VOCs desorption is achieved by a microwave-heated catalytic combustion device 4. The operation process of the microwave-heated catalytic combustion device 4 for VOCs desorption is as follows: close the first adsorption valve 101 and the second adsorption valve 801, open the first desorption valve 501 and the second desorption valve 601, and use the hot gas emitted by the microwave-heated catalytic combustion device 4 to enter the adsorption box 3 for desorption after temperature control (the temperature control method is controlled by a temperature detection instrument, a cooling valve 603 and a reuse valve 602). The desorbed concentrated waste gas is sent to the microwave-heated catalytic combustion device 4 through the concentrated waste gas inlet pipe 5 for VOCs removal. Finally, after the adsorbent desorption is completed, the temperature rise during the adsorption process can be reduced by opening the cooling valve 603 to accelerate the recovery and regeneration of the adsorbent, so as to put it into the VOCs adsorption process more quickly.

[0029] The main operating process of the microwave-heated catalytic combustion device 4 of this invention is as follows: First, microwave heating directly heats the catalyst 403 and air in the catalytic reaction chamber, raising the temperature to the reaction temperature; second, VOCs-containing waste gas is sent into the heat exchanger 402 in the device to exchange heat with the heat-containing gas emitted after catalytic combustion, preheating the VOCs-containing waste gas to facilitate subsequent catalytic combustion reaction; then, the temperature is detected by a temperature detection instrument to control the temperature of the catalytic reaction chamber within a certain range. If the temperature is too high, the output of microwave heating is reduced; if the temperature is too low, the output of microwave heating is increased.

[0030] The microwave heating technology of this invention directly applies microwave energy to the catalyst 403 and waste gas molecules in the reaction chamber, which can rapidly heat and increase the temperature. Compared with traditional heat source heating methods, microwave heating has advantages such as uniform heating, rapid reaction, and high energy efficiency. This heating method can improve the efficiency of catalytic reaction and reduce energy loss.

[0031] Catalytic combustion is a highly efficient VOCs treatment technology. It uses catalyst 403 to lower the reaction temperature, thereby achieving the combustion and decomposition of organic waste gas. This technology can be started at a lower temperature, reducing energy consumption, while effectively removing VOCs from the waste gas.

[0032] The microwave-heated catalytic combustion device 4 ensures that the temperature in the catalytic reaction chamber is within the optimal range through temperature detection instruments and microwave power adjustment, thus avoiding the impact of overheating or overcooling on the catalytic reaction efficiency.

[0033] Heat exchanger 402 is used to transfer the hot gas emitted from microwave-heated catalytic combustion device 4 to the VOCs waste gas entering the device. This process can effectively increase the temperature of the waste gas and reduce the energy required for microwave heating.

[0034] Catalyst 403 is an important component of the microwave-heated catalytic combustion device 4. It can promote the oxidation reaction of VOCs and remove harmful substances in the exhaust gas. Catalysts usually have a high specific surface area to improve the efficiency of the reaction.

[0035] The catalytic reaction chamber is the core part where the waste gas reacts with the catalyst 403. The waste gas comes into contact with the catalyst 403 here and undergoes an oxidation reaction, thereby removing VOCs from the waste gas. By heating with microwaves, the temperature of the reaction chamber can be rapidly increased to ensure that the catalytic reaction proceeds efficiently.

[0036] The pressure relief valve 406 is used to protect the device from excessive pressure. In the event of an emergency, it can quickly release pressure to ensure the safe operation of the microwave-heated catalytic combustion device 4.

[0037] The magnetron heating element 405 is a microwave heating component responsible for providing microwave energy to heat the catalyst 403 and waste gas molecules.

[0038] The outer casing 401 and the insulation cotton 404 are used to isolate heat, ensuring that the heating effect is concentrated in the reaction area, while preventing heat waste.

[0039] The system's control system is highly automated and can adjust the system's operating parameters based on real-time data such as the concentration and temperature changes of the exhaust gas. Through temperature detection instruments, it monitors the temperature of the catalytic reaction chamber in real time and automatically adjusts the microwave heating power to ensure that the reaction temperature remains stable at the optimal level.

[0040] The first adsorption valve 101, the second adsorption valve 801, the first desorption valve 501, and the second desorption valve 601 are all electric air valves. Depending on the working conditions, the electric air valves such as the first adsorption valve 101, the second adsorption valve 801, the first desorption valve 501, and the second desorption valve 601 will automatically adjust the airflow path between the adsorption box 3 and the microwave heating catalytic combustion device 4 to optimize the desorption and catalytic combustion process.

[0041] When the adsorbent is saturated, the system will automatically start the microwave heating catalytic combustion device 4 for desorption; after desorption is completed, the system will automatically resume the adsorption process.

[0042] This invention employs microwave heating catalytic combustion technology, which can directly heat catalyst 403 and waste gas molecules through microwave energy, reducing energy loss in traditional heating methods. This heating method is characterized by speed and uniformity, which greatly improves heating efficiency, reduces dependence on external energy, and thus effectively reduces overall operating costs. Compared with existing technologies, it has the advantage of low cost.

[0043] Meanwhile, this invention uses microwave heating, which is fast and efficient, and does not require traditional heating media or high-power electric heating equipment, thus reducing energy consumption and equipment investment. Due to the improved energy efficiency, energy waste in the waste gas treatment process is reduced, resulting in lower overall operating costs.

[0044] Traditional VOCs treatment devices are often complex in structure, containing various types of equipment such as heating furnaces, catalyst reactors, and cooling devices, requiring a large amount of space. In contrast, this invention combines heating and catalytic processes by employing microwave heating catalytic combustion technology, avoiding the complexity of multiple separate devices. At the same time, the modular design makes the combination of various parts more compact and easier to install and maintain. This results in a simple structural design, reduces the use of multiple separate devices, improves system integration, reduces the footprint, and simplifies the structure of the equipment. This helps to reduce the complexity and cost of manufacturing and installation, and shortens the project construction cycle.

[0045] In existing technologies, temperature control in waste gas treatment systems is often not precise enough, easily leading to excessively high or low temperatures, resulting in reduced catalytic reaction efficiency or side reactions. However, the microwave-heated catalytic combustion device 4 of this invention uses microwave heating to quickly heat the waste gas to the required temperature. Temperature is monitored and adjusted in real-time using a temperature sensor. The advantage of microwave heating lies in its precise temperature control, ensuring the catalytic combustion reaction always occurs within the optimal temperature range, thus guaranteeing the stability and efficiency of waste gas treatment. Precise temperature control makes the catalytic combustion process more stable, enabling efficient removal of VOCs from the waste gas. The treatment effect of this invention is significantly improved compared to traditional methods. Furthermore, the precise adjustment of the reaction temperature avoids overheating or overcooling, improving catalyst lifespan and reaction efficiency.

[0046] Traditional waste gas treatment equipment often requires a lot of manual intervention, is complex to operate, and is prone to human error. However, the device of this invention introduces an automated control system that can automatically monitor and adjust various operating parameters of the equipment, including but not limited to temperature, air volume, and microwave heating power, to ensure that the equipment is always in optimal working condition. This increased level of automation makes operation more convenient, reduces labor costs, and improves the stability and reliability of the equipment. The automated control system reduces the complexity of manual operation, improves the ease of operation of the equipment, and lowers the technical requirements for operators. The system has a high degree of automation and can automatically adjust operating parameters according to changes in waste gas concentration and temperature, avoiding the impact of human factors on equipment performance.

[0047] Traditional VOCs treatment technologies often have limitations in terms of treatment efficiency and thoroughness, especially when treating low-concentration VOCs waste gas, where they may not achieve ideal removal results. However, the microwave heating catalytic combustion technology used in this invention can rapidly heat the waste gas to the high temperature required for the reaction and accelerate the oxidation reaction through a catalyst, ensuring the complete removal of VOCs from the waste gas. The efficient combination of microwave heating and catalytic combustion improves the quality of waste gas treatment, achieving higher emission standards. VOCs in the waste gas are removed more thoroughly, and emissions meet environmental protection standards, avoiding secondary pollution. This results in higher treatment efficiency and better waste gas purification effect, ensuring high-quality waste gas treatment.

[0048] Traditional waste gas treatment equipment often requires a large heat source, consuming a large amount of energy, leading to energy waste and environmental burden. This invention, however, utilizes microwave heating technology, allowing energy to act directly on waste gas and catalyst molecules, significantly improving heating efficiency and reducing energy loss. Furthermore, because the microwave heating system can precisely adjust its output power, energy consumption during waste gas treatment is minimized. This energy-saving technology not only helps reduce operating costs but also reduces negative environmental impact. Therefore, the high-efficiency, low-energy microwave heating technology employed in this invention meets modern energy conservation and environmental protection requirements, reducing energy consumption and environmental impact. Simultaneously, energy savings reduce energy costs and greenhouse gas emissions, resulting in significant environmental benefits.

[0049] In summary, this invention provides a highly efficient and rapid heating process through microwave heating technology, greatly improving energy utilization efficiency and avoiding heat loss associated with traditional heating methods, thus offering the advantage of high-efficiency energy utilization. The microwave-heated catalytic combustion device 4 has a compact structure, occupies a small area, and can reduce energy consumption through precise temperature control, offering the advantages of space saving and energy reduction. It can adaptively adjust process parameters according to actual operating conditions to achieve efficient and stable operation, reduce manual intervention, and improve the system's automation level, offering the advantages of adaptive adjustment and automation.

[0050] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A high-efficiency treatment system for treating VOCs-containing waste gas using microwave heating for catalytic combustion, characterized in that, include: Air inlet duct (1), the air inlet duct (1) is used to transport VOCs-containing waste gas; exhaust stack (2), the exhaust stack (2) is used to discharge clean gas; adsorption box (3), the adsorption box (3) is equipped with an adsorbent for absorbing VOCs components in the waste gas; microwave heating catalytic combustion device (4), the microwave heating catalytic combustion device (4) is used to remove VOCs; concentrated waste gas inlet pipe (5), one end of the concentrated waste gas inlet pipe (5) is fixedly installed in the adsorption box (3), and the other end of the concentrated waste gas inlet pipe (5) is fixedly installed in the inlet of the microwave heating catalytic combustion device (4); connecting pipe (6) and desorption fan (9), the desorption fan (9) is installed between the microwave heating catalytic combustion device (4) and the connecting pipe (6).

2. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion as described in claim 1, characterized in that, An adsorption fan (7) and an exhaust pipe (8) are installed between the adsorption box (3) and the exhaust pipe (2). One end of the exhaust pipe (8) is fixedly installed in the adsorption box (3), and the other end of the exhaust pipe (8) is fixedly installed in the inlet of the adsorption fan (7). The outlet of the adsorption fan (7) is fixedly installed in the exhaust pipe (2).

3. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion as described in claim 2, characterized in that, The outlet of the air inlet pipe (1) is fixedly installed on the adsorption box (3), and the outlet of the air inlet pipe (1) is fixedly installed with a first adsorption valve (101). A second adsorption valve (801) is also installed at one end of the air outlet pipe (8).

4. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion as described in claim 1, characterized in that, A first desorption valve (501) is also installed at one end of the concentrated waste gas inlet pipe (5).

5. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion treatment according to claim 4, characterized in that, The microwave-heated catalytic combustion device (4) includes an outer casing (401), a heat exchanger (402) is fixedly installed in the lower part of the inner cavity of the outer casing (401), the upper part of the inner cavity of the outer casing (401) is a catalytic reaction chamber, and a catalyst (403) is fixedly installed in the catalytic reaction chamber. The temperature in the catalytic reaction chamber is monitored in real time by a temperature detection instrument. Heat insulation cotton (404) for heat insulation is fixedly installed inside the outer casing (401). A magnetic heating tube (405) is fixedly installed at the upper end of the inner cavity of the outer casing (401). A venting valve (406) is installed at the middle position of the top of the outer casing (401).

6. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion according to claim 1, characterized in that, The inlet of the desorption fan (9) is fixedly installed at the outlet of the microwave heating catalytic combustion device (4), the outlet of the desorption fan (9) is fixedly installed at one end of the connecting pipe (6), and the other end of the connecting pipe (6) is fixedly installed at the adsorption box (3).

7. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion as described in claim 1, characterized in that, A discharge pipe (10) is fixedly installed between the connecting pipe (6) and the exhaust pipe (2). The inlet of the discharge pipe (10) is connected to the connecting pipe (6), and the outlet of the discharge pipe (10) is connected to the exhaust pipe (2). A discharge valve (1001) is installed at the inlet of the discharge pipe (10).

8. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion according to claim 7, characterized in that, A second desorption valve (601) is installed at the other end of the connecting pipe (6), a reuse valve (602) is installed on the connecting pipe (6), a cold air inlet is opened on the connecting pipe (6), and a cold air inlet valve (603) is installed at the cold air inlet.

9. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion according to claim 1, characterized in that, A flame arrester (502) is fixedly installed inside the other end of the concentrated waste gas inlet pipe (5).

10. The high-efficiency treatment system for VOCs-containing waste gas using microwave heating for catalytic combustion according to claim 1, characterized in that, It also includes an automated control system, which can automatically monitor and adjust various operating parameters of the equipment, including temperature, air volume, and microwave heating power.

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