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CN-122015104-A - High-efficiency treatment system for catalytic combustion treatment of VOCs-containing waste gas by utilizing microwave heating

CN122015104ACN 122015104 ACN122015104 ACN 122015104ACN-122015104-A

Abstract

The invention provides a high-efficiency treatment system for catalytically burning VOCs-containing waste gas by utilizing microwave heating, which comprises an air inlet pipeline, an exhaust pipe, an adsorption box, a microwave heating catalytic combustion device and a concentrated waste gas air inlet pipe, wherein the air inlet pipeline is used for conveying the VOCs-containing waste gas, the exhaust pipe is used for discharging clean gas, the adsorption box is internally provided with an adsorbent for absorbing VOCs in the waste gas, the microwave heating catalytic combustion device is used for removing the VOCs, and one end of the concentrated waste gas air inlet pipe is fixedly arranged in the adsorption box.

Inventors

  • GUAN CHAOMIN
  • LI XIN
  • HUANG WANPING
  • Li Zaizong

Assignees

  • 广东思索环保发展有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. A high-efficiency treatment system for treating VOCs-containing waste gas by utilizing microwave heating is characterized by comprising an air inlet pipeline (1), an exhaust barrel (2), an adsorption box (3), a microwave heating catalytic combustion device (4), a concentrated waste gas air inlet pipe (5), a communicating pipe (6) and a desorption fan (9), wherein the air inlet pipeline (1) is used for conveying the VOCs-containing waste gas, the exhaust barrel (2) is used for discharging clean gas, an adsorbent for absorbing VOCs in the waste gas is arranged in the adsorption box (3), the microwave heating catalytic combustion device (4) is used for removing the VOCs, one end of the concentrated waste gas air inlet pipe (5) is fixedly arranged in the adsorption box (3), the other end of the concentrated waste gas air inlet pipe (5) is fixedly arranged at the inlet of the microwave heating catalytic combustion device (4), and the desorption fan (9) is arranged between the microwave heating catalytic combustion device (4) and the communicating pipe (6).
  2. 2. The efficient treatment system for catalytic combustion treatment of waste gas containing VOCs by utilizing microwave heating according to claim 1, wherein an adsorption fan (7) and an air outlet pipe (8) are installed between the adsorption box (3) and the exhaust pipe (2), one end of the air outlet pipe (8) is fixedly installed on the adsorption box (3), the other end of the air outlet pipe (8) is fixedly installed on an inlet of the adsorption fan (7), and an outlet of the adsorption fan (7) is fixedly installed on the exhaust pipe (2).
  3. 3. The efficient treatment system for catalytic combustion treatment of waste gas containing VOCs by utilizing microwave heating according to claim 2, wherein the outlet of the air inlet pipeline (1) is fixedly arranged on the adsorption box (3), the outlet of the air inlet pipeline (1) is fixedly provided with a first adsorption valve (101), and one end of the air outlet pipe (8) is further provided with a second adsorption valve (801).
  4. 4. The efficient treatment system for catalytic combustion treatment of exhaust gas containing VOCs by means of microwave heating according to claim 1, wherein a first desorption valve (501) is further installed at one end of the concentrated exhaust gas inlet pipe (5).
  5. 5. The efficient treatment system for catalytic combustion treatment of VOCs-containing waste gas by utilizing microwave heating according to claim 4, wherein the microwave heating catalytic combustion device (4) comprises an outer shell box body (401), a heat exchanger (402) is fixedly installed at the lower part of an inner cavity of the outer shell box body (401), a catalytic reaction chamber is arranged at the upper part of the inner cavity of the outer shell box body (401), a catalyst (403) is fixedly installed in the catalytic reaction chamber, the temperature in the reaction chamber is monitored in real time by a temperature detection instrument, heat insulation cotton (404) used for heat insulation is fixedly installed in the outer shell box body (401), a magnetic control heating pipe (405) is fixedly installed at the upper end of the inner cavity of the outer shell box body (401), and an explosion venting valve (406) is installed at the middle position of the top end of the outer shell box body (401).
  6. 6. The efficient treatment system for catalytic combustion treatment of exhaust gas containing VOCs by means of microwave heating according to claim 1, wherein an inlet of the desorption fan (9) is fixedly installed at an outlet of the microwave heating catalytic combustion device (4), an outlet of the desorption fan (9) is fixedly installed at one end of the communicating pipe (6), and the other end of the communicating pipe (6) is fixedly installed at the adsorption tank (3).
  7. 7. The efficient treatment system for catalytic combustion treatment of exhaust gas containing VOCs by means of microwave heating according to claim 1, wherein a discharge pipe (10) is fixedly installed between the communicating pipe (6) and the exhaust pipe (2), an inlet of the discharge pipe (10) is communicated with the communicating pipe (6), an outlet of the discharge pipe (10) is communicated with the exhaust pipe (2), and an inlet of the discharge pipe (10) is provided with a discharge valve (1001).
  8. 8. The efficient treatment system for catalytic combustion treatment of waste gas containing VOCs by means of microwave heating according to claim 7, wherein a second desorption valve (601) is installed at the other end of the communicating pipe (6), a recycling valve (602) is installed on the communicating pipe (6), a cold air supplementing port is formed in the communicating pipe (6), and a cold air supplementing valve (603) is installed at the cold air supplementing port.
  9. 9. The efficient treatment system for catalytic combustion treatment of exhaust gas containing VOCs by means of microwave heating according to claim 1, wherein a flame arrester (502) is fixedly installed inside the other end of the concentrated exhaust gas inlet pipe (5).
  10. 10. The efficient treatment system for catalytic combustion of exhaust gas containing VOCs using microwave heating according to claim 1, further comprising an automated control system capable of automatically monitoring and adjusting various operating parameters of the apparatus, including temperature, air volume, microwave heating power.

Description

High-efficiency treatment system for catalytic combustion treatment of VOCs-containing waste gas by utilizing microwave heating Technical Field The invention belongs to the technical field of VOCs-containing waste gas treatment, and particularly relates to a high-efficiency treatment system for treating VOCs-containing waste gas by catalytic combustion through microwave heating. Background Along with the promotion of industrialization progress, the emission problem of Volatile Organic Compounds (VOCs) is gradually valued by global environmental protection, and the VOCs not only cause serious pollution to the atmospheric environment, but also react with ozone, fine particulate matters (PM 2.5) and other atmospheric pollutants to further exacerbate air pollution and generate great threat to human health. At present, the treatment technology of VOCs mainly comprises an adsorption method, a catalytic method, a combustion method and the like. The adsorption method utilizes adsorption materials (such as active carbon, zeolite molecular sieve and the like) to trap VOCs so as to reduce the emission of the VOCs, the catalytic method promotes the oxidative decomposition of the VOCs to convert the VOCs into harmless substances through a catalyst, and the combustion method burns the VOCs through high temperature so as to achieve the aim of purifying air, however, the method still has some defects: the adsorption method has the limitations that the adsorption method adsorbs VOCs through a solid adsorption material, but after the adsorbent is saturated, the adsorbent needs to be regenerated, and the traditional regeneration method, such as a thermal regeneration method, has the problems of high energy consumption, complex operation and the like, and particularly has poor regeneration effect of the adsorbent when treating high-concentration VOCs, so that the treatment efficiency is reduced and the operation cost is increased; the high energy consumption problem of the catalytic method is that the catalytic method decomposes VOCs into harmless substances under the action of the catalyst, but the activity of the catalyst is greatly influenced by temperature and environment, and the catalytic efficiency is low under the low-temperature condition, so that a reaction system needs to be heated, thereby increasing the energy consumption; The traditional VOCs treatment equipment consumes a large amount of energy sources in the operation process, particularly the energy consumption in the heating and temperature control modes is high, so that the overall energy efficiency is low, in addition, the equipment is complex in structure and high in operation cost, and the popularization of the equipment in practical application is limited to a certain extent; The existing VOCs treatment technology often presents the problem of low treatment efficiency when treating the low-concentration VOCs, particularly a catalytic method and a combustion method, which generally require higher temperature or longer reaction time, so that the treatment efficiency is low and even the emission standard can not be met; The limitation of combustion methods is that although they are capable of efficiently decomposing VOCs, the processes typically require relatively high temperatures, which not only result in significant energy consumption, but also may create new pollutants (e.g., NOx, CO, etc.) to the environment. In addition, high temperature operation also increases maintenance costs and safety hazards for the equipment. In summary, the existing VOCs treatment techniques have certain drawbacks in terms of adsorption, catalysis, combustion, etc., such as low energy consumption. Disclosure of Invention (1) Technical problem to be solved Aiming at the defects of the prior art, the invention aims to provide a high-efficiency treatment system for treating VOCs-containing waste gas by utilizing microwave heating to perform catalytic combustion, and aims to solve the defect problems of the existing VOCs treatment technology in the aspects of adsorption, catalysis, combustion and the like. (2) Technical proposal In order to solve the technical problems, the invention provides a high-efficiency treatment system for treating exhaust gas containing VOCs by utilizing microwave heating to perform catalytic combustion, which comprises an air inlet pipeline, an exhaust pipe, an adsorption box, a microwave heating catalytic combustion device, a concentrated exhaust gas air inlet pipe, a communicating pipe and a desorption fan, wherein the air inlet pipeline is used for conveying the exhaust gas containing VOCs, the exhaust pipe is used for discharging clean gas, the adsorption box is internally provided with an adsorbent for absorbing VOCs in the exhaust gas, the microwave heating catalytic combustion device is used for removing the VOCs, one end of the concentrated exhaust gas air inlet pipe is fixedly arranged in the adsorption box, the other end of the concentrated ex