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Device and treating method for treating organic waste gas through concerted catalysis of dielectric barrier discharge and low-temperature plasma

A low-temperature plasma, dielectric barrier discharge technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of easy coking, low safety, and electrode corrosion of dielectric barrier discharge tubes, and improve mineralization. efficiency, overcoming coking, reducing energy consumption and the production of by-products

Inactive Publication Date: 2017-08-15
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the existing low-temperature plasma catalytic treatment of organic waste gas, the dielectric barrier discharge tube is easy to coke, electrode corrosion, high energy consumption, and low safety problems, the present invention provides a device for dielectric barrier discharge low-temperature plasma cooperative catalytic treatment of organic waste gas And the treatment method, the low-temperature plasma generator is separated from the reaction chamber, and an appropriate amount of air enters the low-temperature plasma generator to generate active components such as oxygen free radicals, which will undergo degradation reactions with the treated waste gas in the reaction chamber and catalyst bed, avoiding The direct contact between the low-temperature plasma generation device and the organic waste gas reduces energy consumption and improves the safety and stability of the device operation. At the same time, the combination of low-temperature plasma and catalytic technology improves the degradation efficiency of organic waste gas

Method used

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  • Device and treating method for treating organic waste gas through concerted catalysis of dielectric barrier discharge and low-temperature plasma
  • Device and treating method for treating organic waste gas through concerted catalysis of dielectric barrier discharge and low-temperature plasma
  • Device and treating method for treating organic waste gas through concerted catalysis of dielectric barrier discharge and low-temperature plasma

Examples

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Embodiment 1

[0035] A device for treating industrial toluene-containing waste gas with dielectric barrier discharge low-temperature plasma synergistic catalytic treatment of organic waste gas, such as figure 1 As shown, it includes a main device and a low-temperature plasma generating device 3. The main device is divided into a filter bed 1, a reaction chamber 2, and an adsorption catalyst bed 4 from bottom to top. The low-temperature plasma generating device 3 is located in the reaction chamber. The outside of the chamber 2 is seamlessly connected with the reaction chamber 2.

[0036] The low-temperature plasma generating device 3 is internally provided with a low-temperature plasma generating module 5 and an electric fan 6, and the low-temperature plasma generating module 5 is connected to the interior of the reaction chamber 2, such as figure 2 As shown, the low-temperature plasma generation module 5 is composed of 50 low-temperature plasma generators 8 arranged in parallel at equal in...

Embodiment 2

[0043] In order to process the same waste gas as in Example 1, the general structure of the device used in Example 2 is basically the same as that in Example 1, the only difference being:

[0044] The low-temperature plasma generation module is composed of 20 low-temperature plasma generators arranged in parallel at equal intervals; the length of the inner electrode in the low-temperature plasma generator is 35cm, the diameter is 5cm, and the thread pitch is 1.5mm; the cylindrical dielectric material The wall thickness is 3mm, the length is 30cm; the filter bed layer is 1 layer; the adsorption catalyst bed layer is 2 layers, the layer spacing is 3cm, the catalyst is alumina loaded with cerium oxide, and the particle size of alumina is 10mm; Other structures and parameters remain unchanged.

[0045] Adopt the same operation method of embodiment 1, utilize the device described in this embodiment 2 to be 50m to the waste gas flow rate before processing 3 / h, the waste gas whose ...

Embodiment 3

[0047] In order to process the same waste gas as in Example 1, the general structure of the device used in Example 3 is basically the same as that in Example 1, the only difference being:

[0048] The low-temperature plasma generation module is composed of 40 low-temperature plasma generators arranged in parallel at equal intervals; the length of the inner electrode in the low-temperature plasma generator is 25cm, the diameter is 3.5cm, and the thread pitch is 1mm; the cylindrical dielectric material is Ceramic, wall thickness is 2mm, length is 20cm; filter bed is 2 layers, bed thickness is 10cm, layer spacing is 3cm, filter bed filler is quartz sand; adsorption catalyst bed is 3 layers, bed thickness is 10cm, the interlayer spacing is 4cm, the catalyst is a molecular sieve loaded with cobalt oxide, and the particle size of alumina is 8mm; other structures and parameters of the device remain unchanged.

[0049] Adopt the same operation method of embodiment 1, utilize the devic...

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Abstract

The invention discloses a device and a treating method for treating organic waste gas through concerted catalysis of dielectric barrier discharge and low-temperature plasma and belongs to the technical field of organic gas treatment. Organic waste gas enters a reaction cavity through a gas inlet device after being filtered by a filter bed layer, a low-temperature plasma generation device inhales external air through a fan at the same time, high-energy active particles and ozone generated by dielectric barrier discharge stimulation enter the reaction cavity to oxidize and decompose the organic waste gas, gas flow in the reaction cavity passes through an absorbing catalytic bed layer at the upper portion of the device to be further reinforced and decomposed under catalyst action to generate harmless gas of CO2, H2O and the like which can be emitted on standard. The device disclosed by the invention has the advantages that the low-temperature plasma generation device is separated from waste gas, so that the problems of discharge device corrosion and the like caused by direct contact are avoided, and low-temperature plasma and catalysis are effectively combined to reinforce organic waste gas treatment.

Description

technical field [0001] The invention belongs to the technical field of organic waste gas treatment, and more specifically relates to a device and a treatment method for cooperative catalytic treatment of organic waste gas by dielectric barrier discharge low-temperature plasma. Background technique [0002] The production process of petrochemical, printing, coating, electroplating and textile industries is often accompanied by the emission of volatile organic compounds (Volatile Organic Compounds, VOCs). VOCs can react photochemically with nitrogen oxides to form photochemical smog; OH, NO in the atmosphere 3 - , O 3 Such oxidants react in multiple ways to generate secondary organic aerosols (SOA), which cause great harm to people's health and the air environment. [0003] In recent years, low-temperature plasma technology has been widely used as an effective technical method for organic waste gas treatment. It has the advantages of high efficiency, fast start-up speed, no...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D46/30B01D53/44B01D53/48B01D53/70B01D53/72B01D53/74B01D53/75B01D53/86
Inventor 龙超张健刘慧娟刘笑寒
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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