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Method for removing sulfur dioxide by joint oxidation of peroxyacetic acid and ozone

A technology for removing sulfur dioxide and peracetic acid, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of complex reaction, secondary pollution, and low rate of sulfur dioxide removal, and achieve high removal rate, Environmentally friendly, simple and efficient response

Inactive Publication Date: 2018-02-27
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current method applied to the actual desulfurization gas, there are: complex reaction; low desulfurization gas rate; secondary pollution and other deficiencies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: first feed sulfur dioxide gas and react with peracetic acid after atomization treatment, wherein: the reaction temperature of the reactor is 25°C; the molar ratio of peracetic acid to sulfur dioxide gas is 3:1; the reaction time is 3S; the mass fraction of peracetic acid is 20%, and sulfur dioxide gas is introduced to react with atomized peracetic acid, and then gas-phase ozone is continuously introduced to react, wherein: the reaction temperature with gas-phase ozone is 25°C; The molar ratio with sulfur dioxide gas is 1:1; the reaction time is 2S, and it will be absorbed by water after the reaction is completed. Using this method, the measured removal rate of sulfur dioxide is 94%.

Embodiment 2

[0017] Example 2: first feed sulfur dioxide gas and react with peracetic acid after atomization treatment, wherein: the reaction temperature of the reactor is 40°C; the molar ratio of peracetic acid to sulfur dioxide gas is 2:1; the reaction time is 1S; the mass fraction of peracetic acid is 30%, and sulfur dioxide gas is introduced to react with atomized peracetic acid, and then gas-phase ozone is continuously introduced to react, wherein: the reaction temperature with gas-phase ozone is 40°C; The molar ratio with sulfur dioxide gas is 1:1; the reaction time is 1S, and it will be absorbed by water after the reaction is completed. Using this method, the measured removal rate of sulfur dioxide is 98%.

Embodiment 3

[0018] Embodiment 3: First feed sulfur dioxide gas and react with peracetic acid after atomization treatment, wherein: the reaction temperature of the reactor is 60°C; the molar ratio of peracetic acid to sulfur dioxide gas is 2:1; the reaction time is 2S; the mass fraction of peracetic acid is 40%, and sulfur dioxide gas is introduced to react with atomized peracetic acid, and then gas-phase ozone is continuously introduced to react, wherein: the reaction temperature with gas-phase ozone is 60°C; The molar ratio with sulfur dioxide gas is 2:1; the reaction time is 1S, and it will be absorbed by water after the reaction is completed. Adopt this method, measure the removal rate of sulfur dioxide to be 100%.

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PUM

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Abstract

The invention discloses a method for removing sulfur dioxide gas by the joint oxidation of peroxyacetic acid and ozone. The method is characterized by including the following steps: (1) sulfur dioxidegas is introduced into a reactor to react with atomized peroxyacetic acid; the molar ratio of the peroxyacetic acid to the sulfur dioxide gas is (3 to 1) to (1 to 1); reaction time is 1 to 3 seconds,and reaction temperature is 25 DEG C to 80 DEG C; (2) after reaction, gaseous ozone is introduced into the reactor for reaction; the molar ratio of the ozone to the sulfur dioxide gas is (3 to 1) to(1 to 1), and reaction temperature is 25 DEG C to 80 DEG C; (3) after reaction, the gas is absorbed by water. The method adopts the joint oxidation of the peroxyacetic acid and the ozone to remove thesulfur dioxide gas, not only is reaction simple and highly efficient, but also the sulfur dioxide removal rate is high, and a reaction product is environment-friendly.

Description

technical field [0001] The invention relates to a method for jointly oxidizing sulfur dioxide gas with peracetic acid and ozone, and belongs to the technical field of environmental protection methods. Background technique [0002] Sulfur dioxide is the most common and simplest sulfur oxide. One of the main air pollutants. Sulfur dioxide is also produced in many industrial processes. Since coal and petroleum typically contain elemental sulfur, sulfur dioxide is formed when burned. In the atmosphere, sulfur dioxide will be oxidized to form sulfuric acid mist or sulfate aerosol, which is an important precursor of environmental acidification. Sulfur dioxide treatment technologies can be divided into three categories: desulfurization before combustion, desulfurization during combustion, and desulfurization after combustion. Flue gas desulfurization (FGD) is the most economical and effective means to reduce sulfur dioxide emissions. Currently, there are deficiencies in the me...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/50
CPCB01D53/75B01D53/50B01D53/76B01D53/78B01D2251/106B01D2251/1065
Inventor 张龙刘彤赵亚州
Owner GUIZHOU UNIV
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