Method for jointly oxidizing flue gas for desulfurization and denitrification by using peracetic acid and ozone

A peracetic acid, desulfurization and denitrification technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low denitrification rate, large energy consumption, high operating costs, etc., and achieve simple and fast reaction, desulfurization and denitrification rate High, less reaction process effect

Inactive Publication Date: 2018-01-12
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently applied to the actual flue gas desulfurization and denitrification methods, there are: large area; high operating costs; large energy consumption; low denitrification rate; secondary pollution and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: first feed flue gas and react with peracetic acid after atomization treatment, wherein: get the reaction temperature of reactor to be 25 ℃; Peracetic acid and NO X The molar ratio of peracetic acid and SO is 0.4:1; X The molar ratio is 0.4:1; the reaction time is 0.8S; the mass fraction of peracetic acid is 20%, which is fed into the flue gas and reacted with the atomized peracetic acid, and then continues to be fed into the gas phase ozone for reaction, wherein: Take the reaction temperature with gaseous ozone at 25°C; ozone and NO X The molar ratio of ozone and SO is 0.3:1; X The molar ratio is 0.3:1, the reaction time is 1S, and it is absorbed by water after the reaction is completed. Using this method, the measured desulfurization rate is 97%, and the denitrification rate is 95%.

Embodiment 2

[0017] Embodiment 2: first feed flue gas and react with peracetic acid after atomization treatment, wherein: get the reaction temperature of reactor to be 50 ℃; Peracetic acid and NO X The molar ratio is 1:1; peracetic acid and SO X The molar ratio is 1:1; the reaction time is 1S; the mass fraction of peracetic acid is 30%, which is fed into flue gas and reacted with peracetic acid after atomization treatment, and then continues to be fed into gas phase ozone for reaction, wherein: The reaction temperature with gaseous ozone is 40°C; ozone and NO X The molar ratio of ozone and SO is 1:1; X The molar ratio is 1:1, the reaction time is 1S, and it is absorbed by water after the reaction is completed. Using this method, the measured desulfurization rate is 98%, and the denitrification rate is 97%.

Embodiment 3

[0018] Embodiment 3: first feed flue gas and react with peracetic acid after atomization treatment, wherein: get the reaction temperature of reactor to be 80 ℃; Peracetic acid and NO X The molar ratio of peracetic acid and SO is 2:1; X The molar ratio is 2:1; the reaction time is 3S; the mass fraction of peracetic acid is 20%, which is fed into the flue gas and reacted with the atomized peracetic acid, and then continues to be fed into gas phase ozone for reaction, wherein: The reaction temperature with gaseous ozone is 80°C; ozone and NO X The molar ratio of ozone and SO is 2:1; X The molar ratio is 2:1, the reaction time is 3S, and it is absorbed by water after the reaction is completed. Using this method, the measured desulfurization rate is 99%, and the denitrification rate is 99%.

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PUM

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Abstract

The invention discloses a method for jointly oxidizing flue gas for desulfurization and denitrification by using peracetic acid and ozone. The method is characterized by comprising the following steps: (1) introducing flue gas into a reactor and reacting with the atomized peracetic acid, wherein the mole ratio of peracetic acid to NOX is at (0.4:1) to (2:1), the mole ratio of peracetic acid to SOXis at (0.4:1) to (2:1), the reaction time is 0.8-3S and the reaction temperature is at 25 DEG C-80 DEG C; (2) reacting by introducing gaseous ozone into the reactor after the reaction, the mole ratioof ozone to NOX is at (0.3:1) to (2:1), the mole ratio of ozone to SOX is at (0.3:1) to (2:1), the reaction time is 1-3S and the reaction temperature is at 25 DEG C-90 DEG C; and (3) absorbing the reacted gas by water. According to the invention, the peracetic acid and ozone are adopted for jointly oxidizing flue gas for desulfurization and denitrification, so that the reaction is simple and quick, the desulfurization and denitrification rate is high, the reaction processes are few and the reaction product is environment-friendly.

Description

technical field [0001] The invention relates to a method for jointly oxidizing flue gas with peracetic acid and ozone for desulfurization and denitrification, and belongs to the technical field of environmental protection methods. Background technique [0002] There are three main types of flue gas simultaneous desulfurization and denitrification technologies. The first type is the combined technology of flue gas desulfurization and flue gas denitrification; the second type is the simultaneous removal of SOX and NOX by using adsorbents; (FGD) system is modified (such as adding denitrification agent in the desulfurization liquid, etc.) to increase the denitrification function. At present, there are disadvantages in the actual flue gas desulfurization and denitrification methods: large area; high operating costs; large energy consumption; low denitrification rate; secondary pollution and other shortcomings. Contents of the invention [0003] The purpose of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/56B01D53/76B01D53/50B01D53/18
Inventor 张龙刘彤赵亚州
Owner GUIZHOU UNIV
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