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SO removal by naoh synergistic gas-liquid two-phase sliding arc discharge 2 Methods

A sliding arc, SO2 technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as secondary pollution, and achieve the effects of thorough purification, good application prospects, and simple and easy methods.

Active Publication Date: 2019-09-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of NaOH cooperative gas-liquid two-phase sliding arc discharge to remove SO 2 The method solves the problem that the existing desulfurization method is prone to secondary pollution

Method used

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  • SO removal by naoh synergistic gas-liquid two-phase sliding arc discharge <sub>2</sub> Methods
  • SO removal by naoh synergistic gas-liquid two-phase sliding arc discharge <sub>2</sub> Methods
  • SO removal by naoh synergistic gas-liquid two-phase sliding arc discharge <sub>2</sub> Methods

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Experimental program
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Effect test

Embodiment 1

[0041] Adopt the desulfurization method of the present invention to carry out desulfurization treatment to thermal power plant flue gas, in this flue gas SO 2 The gas content is about 80ppm.

[0042] Open the atomizer, vaporize the NaOH solution with a concentration of 0.2mol / L, make the relative humidity of the NaOH moisture about 75%, then pass it into the buffer bottle, and open the flue gas tank at the same time, 2 The flue gas of the gas is passed into the buffer bottle together, and the NaOH moisture and the flue gas are mixed evenly at a ratio of 3:4200. Pass the uniformly mixed gas into the sliding arc plasma reactor, and keep it flowing in the sliding arc plasma reactor; adjust the flow rate of the gas into the reactor to be 6L / min, and the narrowest distance between the electrodes is 1mm , adjust the discharge power to 0.19kW, and discharge for 5s. The treated gas is passed into the NaOH lye tank to generate corresponding salts to complete desulfurization, and the ...

Embodiment 2

[0044] Adopt the desulfurization method of the present invention to carry out desulfurization treatment to thermal power plant flue gas, in this flue gas SO 2 The gas content is about 120ppm.

[0045] Open the atomizer, vaporize the NaOH solution with a concentration of 0.4mol / L, make the relative humidity of NaOH moisture 70%, then pass it into the buffer bottle, and open the flue gas tank at the same time, 2 The flue gas of the gas is passed into the buffer bottle together, and the NaOH moisture and the flue gas are mixed evenly at a ratio of 3:3000 (1:1000). Pass the uniformly mixed gas into the sliding arc plasma reactor, and keep it flowing in the sliding arc plasma reactor; adjust the flow rate of the gas entering the reactor to 10L / min, and the narrowest distance between the electrodes is 3mm , adjust the discharge power to 0.22kW, and discharge for 7s. Pass the treated gas into the NaOH lye tank to generate corresponding salts to complete desulfurization, and lead ou...

Embodiment 3

[0047] Adopt the desulfurization method of the present invention to carry out desulfurization treatment to thermal power plant flue gas, in this flue gas SO 2 The gas content is about 300ppm.

[0048] Open the atomizer, vaporize the NaOH solution with a concentration of 0.8mol / L, make the relative humidity of the NaOH moisture 80%, then pass it into the buffer bottle, and open the flue gas tank at the same time, 2 The flue gas of the gas is passed into the buffer bottle together, and the NaOH moisture and the flue gas are mixed evenly at a ratio of 3:4000; The flow state is maintained inside; the flow rate of the gas entering the reactor is adjusted to 8L / min, the distance between the electrodes at the narrowest point is 2mm, the discharge power is adjusted to 0.25kW, and the discharge treatment is 10s. The treated gas is passed into the NaOH lye tank to generate corresponding salts to complete desulfurization, and the desulfurized gas is drawn out from the gas outlet to comp...

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Abstract

The invention discloses a method for removing sulfide through cooperation of NaOH and gas-liquid two-phase gliding arc discharge. The method comprises steps as follows: a vaporized NaOH solution and to-be-desulfurized flue gas are mixed uniformly and are introduced into a gliding arc plasma reactor, discharge power is regulated to be 0.19 kW-0.25 kW, discharge treatment is performed for 5s-10s, gas obtained after discharge is absorbed by alkali liquor, and clean gas without sulfide is obtained. With the adoption of the gliding arc discharge technology, the method is simple and easy, a large quantity of OH free radicals can be produced in a discharge process, the spectral intensity is enhanced, the desulfurization efficiency can be effectively improved and can reach 95%, the defect of high pollution of a thermal power plant is overcome, and the method has better application prospect.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a NaOH coordinated gas-liquid two-phase sliding arc discharge to remove SO 2 Methods. Background technique [0002] A large amount of exhaust gas from thermal power plants poses a huge threat to the atmospheric environment and human health, among which particulate pollutants, SO 2 And nitrogen oxide emissions are the largest, the most serious harm. Acid rain is one of the main environmental problems caused by air pollution, mainly caused by man-made emissions of SO 2 90% of its pollution comes from burning coal. At present, relatively mature flue gas treatment processes such as limestone / lime method, selective catalytic reduction and other desulfurization and denitrification costs are relatively high, prone to secondary pollution, and do not have the ability to treat multiple waste gases at the same time. Contents of the invention [0003] The o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/76B01D53/78B01D53/32
Inventor 王德意邵朱夏曹一崧杨国清闫梦瑶杨宇凡杨昭
Owner XIAN UNIV OF TECH