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Method and device for removing harmful gas through discharging plasmas

A discharge plasma and harmful gas technology, which is applied in the fields of air pollution control and environmental protection, can solve the problems of difficult large-scale application and high energy consumption, and achieve the effect of promoting absorption and degradation and improving energy utilization efficiency

Inactive Publication Date: 2016-09-21
黄华丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-equilibrium plasma is usually generated by pulse discharge or silent discharge (also known as dielectric barrier discharge), but due to the extreme duration of non-equilibrium plasma, when dealing with low-concentration and atmospheric harmful gases, the energy consumption is high, so Difficult to apply on a large scale in industry

Method used

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  • Method and device for removing harmful gas through discharging plasmas
  • Method and device for removing harmful gas through discharging plasmas
  • Method and device for removing harmful gas through discharging plasmas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A device for removing harmful gases by discharge plasma according to the present invention such as figure 1 shown. The device is cylindrical, the material of the cylinder is PP, the external dimensions are Φ150mm×1200mm, and it is placed vertically. electrode as figure 2 The disc-shaped mesh electrode, the electrode material is 316L stainless steel, punched and formed, the mesh is rectangular, the electrode size is Φ140mm×2mm, the single hole size is 10mm×10mm, the distance between the electrodes is about 15mm, a total of 12 groups. The electrode power supply methods are DC, pulse and AC, in which the DC and AC voltages are about 6kV, the AC frequency is about 50Hz, the pulse voltage is about 8kV, and the pulse frequency is about 30Hz. The negative electrode is grounded when the DC and pulse power supply is used, and the power supply is about 50Hz. 100W.

[0018] The treatment process is to enter the gas-liquid contact discharge plasma area of ​​the de...

Embodiment 2

[0023] Example 2: The electrode material is a titanium-based ruthenium dioxide composite electrode, and the gas flow rate is about 2m 3 / h. The residence time of the gas flow in the gas-liquid contact discharge plasma area is about 5s, the spray volume of the absorption liquid is about 25L / h, and the spray frequency is about 1 time / s. The distance between electrodes is about 30mm. The electrode power supply mode is pulse, the pulse voltage is about 15kV, and the pulse frequency is about 50Hz. Other experimental conditions are the same as in Example 1.

[0024] The experimental results are shown in Table 2.

[0025] Table 2 Harmful substance removal effect

[0026] Harmful substances

Embodiment 3

[0027] Embodiment 3: A device for removing harmful gases by discharge plasma according to the present invention such as image 3 shown. The main body of the device is in the shape of a cuboid, made of PP, and the main body dimensions are 200mm×150×450mm, placed horizontally. The electrode is a rectangular mesh electrode, the electrode material is 316L stainless steel, punched and formed, the mesh is rectangular, the overall size is 180mm×130×2mm, the single hole size is 10mm×10mm, the distance between the electrodes is about 10mm, a total of 12 groups, placed horizontally . The electrode power supply mode is DC, the voltage is about 4kV, and the power supply is about 100W.

[0028] The treatment process is to enter the gas-liquid contact discharge plasma area 2 of the device through the gas inlet 1 through the gas distributor 3 (inlet) into the air flow containing the harmful gas, and connect the positive electrode 14 of the mesh electrode with alternating positive and negat...

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Abstract

The invention provides a method and device for removing harmful gas through discharging plasmas and belongs to the technical field of atmosphere pollution control and environmental protection. The method includes the processing processes that harmful gas is introduced into the device, the device is internally provided with a plurality of sets of positive-negative (or positive-earth)-alternative electrode pairs which are communicated with a high-voltage power source, absorption liquid drops out of an absorption liquid sprayer make contact with electrodes, so that positive electrodes and negative electrodes are in instant breakover and discharge to make surrounding gas be ionized, gas liquid composed of high-energy electrons, atoms, free radicals and the like can make contact with a discharging plasma area, when the harmful gas passes through the discharging plasma area, the harmful gas in air flow is oxidized, decomposed and removed out of the air flow, and the sprayed absorption liquid is collected by an absorption liquid recycling water pool on the lower portion of the device and then recycled through an absorption liquid recycling system.

Description

technical field [0001] The invention relates to a method and device for removing harmful gases by discharge plasma, in particular to removing volatile organic compounds such as hydrocarbons (excluding methane), alcohols, aldehydes, ethers, phenols, ketones, esters, amines and heterocyclic compounds from gas streams , Inorganic gases such as gaseous sulfide, gaseous fluoride, ammonia, sulfur oxide and nitric oxide, belong to the technical field of air pollution control and environmental protection. Background technique [0002] Harmful gases produced by various industrial processes such as chemistry, pharmaceuticals, combustion, painting and semiconductors, such as volatile organic compounds such as hydrocarbons (excluding methane), alcohols, aldehydes, ethers, phenols, ketones, esters, amines and heterocyclic compounds, Inorganic substances such as gaseous sulfide, gaseous fluoride, ammonia, sulfur oxides and nitric oxide, these pollutants are not only harmful to the human b...

Claims

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Application Information

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IPC IPC(8): B01D53/32B01D53/18B01D53/86B01D53/44B01D53/48B01D53/68B01D53/58B01D53/50B01D53/56B01D53/60
CPCB01D53/32B01D53/18B01D53/8603B01D53/8609B01D53/8625B01D53/8634B01D53/8637B01D53/8659B01D53/8687B01D2257/708B01D2259/818
Inventor 黄立维
Owner 黄华丽
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