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Method and device for cooperative uptake of sulfur dioxide by discharge plasmas

A discharge plasma, sulfur dioxide technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as large equipment investment, low sulfur dioxide absorption effect, and large water consumption.

Inactive Publication Date: 2017-02-22
黄华丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the absorption effect of sulfur dioxide by using water as absorbent is very low
Therefore, the use of lime / limestone and other lye absorption methods is currently the main method for flue gas sulfur dioxide waste gas treatment, but absorption requires a large amount of water consumption, large equipment investment, complex systems, and the desulfurization products are difficult to recycle.

Method used

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  • Method and device for cooperative uptake of sulfur dioxide by discharge plasmas
  • Method and device for cooperative uptake of sulfur dioxide by discharge plasmas
  • Method and device for cooperative uptake of sulfur dioxide by discharge plasmas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A kind of discharge plasma cooperative absorption sulfur dioxide device according to the present invention is 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 nickel-chromium stainless steel, punched and formed, the mesh is rectangular, the electrode size is Φ140mm×2mm, the single hole size is 10mm×10mm, and the distance between electrodes is about 15mm, a total of 12 groups . The electrode power supply methods are DC, pulse and AC respectively. The DC and AC voltages are both about 6kV, the AC frequency is about 50Hz, the pulse voltage is about 8kV, and the pulse frequency is about 50Hz. When DC and pulse power supply, the other electrode is grounded. All about 100W.

[0021] The treatment process is to enter the air flow of sulfur dioxide gas from the gas inlet 6 throug...

Embodiment 2

[0023] Embodiment 2: when air temperature is respectively 60, 100, 150 and 180 ℃, power supply mode is direct current, and other experimental conditions are the same as embodiment 1, and the outlet concentration that obtains sulfur dioxide is respectively 53mg / m 3 、61mg / m 3 , 84mg / m 3 and 103mg / m 3 . When the temperature of the air flow is 60°C, the air flow is firstly dehumidified by a solid calcium chloride or magnesium sulfate packed tower, and the relative humidity of the gas after dehumidification is about 40%, and then the above process is carried out to obtain an outlet concentration of sulfur dioxide of about 45mg / m 3 .

Embodiment 3

[0024] Example 3: The concentration of sulfuric acid in the initial absorption liquid was 1%, 10% and 30%, respectively, the gas inlet temperature was 90°C, the power supply was pulsed, and other experimental conditions were the same as in Example 1. The outlet concentration of sulfur dioxide obtained is 275mg / m 3 、212mg / m 3 and 96mg / m 3 .

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Abstract

The invention provides a method and a device for the cooperative uptake of sulfur dioxide by discharge plasmas and belongs to the technical field of air pollution control and environmental chemical engineering. According to the process of the method, a gas flow introducing device containing SO2 gas is adopted. A plurality of groups of electrode pairs, with alternately arranged positive and negative electrodes (or alternately arranged positive electrodes or alternately arranged negative electrodes), are arranged inside the device. The plurality of groups of electrode pairs are communicated with a high-voltage power supply. The droplets of a sulfuric acid absorption liquid, supplied by an absorption liquid spray thrower, are in contact with the above electrodes, so that the electrodes are instantly conducted to ionize the surrounding gas. Therefore, a gas-liquid contact discharge plasma region composed of high-energy electrons, atoms, radicals and the like is formed. When a gas flow passes through the above discharge plasma region, the SO2 gas in the gas flow is oxidized to form SO3. After that, SO3 is absorbed by the absorption liquid, so as to be removed from the gas flow.

Description

technical field [0001] The invention relates to a method and a device for synergistically absorbing sulfur dioxide by discharge plasma, belonging to the technical fields of air pollution control and environmental chemical engineering. Background technique [0002] The massive emission of sulfur dioxide produced by human activities is the main cause of acid rain in the atmosphere. Among them, sulfur dioxide (SO 2 ) accounted for more than 90%, followed by metallurgy, sulfuric acid, oil refining and chemical pharmaceutical processes. Sulfur dioxide is toxic to humans and strongly irritating to the eyes and respiratory tract. Inhalation of high concentrations of sulfur dioxide can cause laryngeal edema, pulmonary edema, vocal cord edema and / or convulsions leading to suffocation. Statistical data from the Bulletin on the State of the Environment in China show that acid rain pollution in cities in my country has increased in recent years. The country has also enacted some laws...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/32
CPCB01D53/1481B01D53/32B01D2252/10B01D2258/0283
Inventor 黄立维
Owner 黄华丽
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