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Method for flue gas denitration by using hydrogen peroxide and manganese dioxide

A manganese dioxide and hydrogen peroxide technology is applied in the field of flue gas denitrification, which can solve the problems of poor denitrification effect by oxidation method, and achieve the effects of novel process design, improved removal effect and good denitration effect.

Pending Publication Date: 2022-03-15
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the insufficient design of the oxidation process, the denitrification effect of the oxidation method is poor, so there is no mature and low-cost process operation in the existing denitrification process.

Method used

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  • Method for flue gas denitration by using hydrogen peroxide and manganese dioxide

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, this embodiment provides the specific steps of the method for using hydrogen peroxide and manganese dioxide to denitrify flue gas.

[0031] (1) Dilute the hydrogen peroxide with a mass ratio of 35% to 3%;

[0032] (2) Take 100kg of hydrogen peroxide from step (1) and put it into a stirred reactor through the liquid inlet 1. The structure diagram of the stirred reactor is as follows figure 1 , the volume of the stirred reactor is 200 liters, and the stirrer 7 of the stirred reactor is a propulsive stirrer, and a gas distributor 4 is arranged at the lower position of the stirrer 7, and the gas distributor 4 is connected with the gas inlet 3 of the stirred reactor, The upper part of the stirred reactor is provided with a gas outlet 5, a liquid inlet 1, and a powder inlet 2, and the bottom of the stirred reactor is provided with a liquid outlet 8;

[0033] (3) Start the stirring reaction kettle, the rotating speed of the stirrer is 20r / min, and ...

Embodiment 2

[0040] Such as figure 1 As shown, this embodiment provides the specific steps of the method for using hydrogen peroxide and manganese dioxide to denitrify flue gas.

[0041] (1) Dilute the hydrogen peroxide with a mass ratio of 35% to 1% with water;

[0042] (2) Take 100kg of hydrogen peroxide from step (1) and put it into a stirred reactor through the liquid inlet 1. The structure diagram of the stirred reactor is as follows figure 1 , the volume of the stirred reactor is 200 liters, and the stirrer 7 of the stirred reactor is a propulsive stirrer, and a gas distributor 4 is arranged at the lower position of the stirrer 7, and the gas distributor 4 is connected with the gas inlet 3 of the stirred reactor, The upper part of the stirred reactor is provided with a gas outlet 5, a liquid inlet 1, and a powder inlet 2, and the bottom of the stirred reactor is provided with a liquid outlet 8;

[0043] (3) Start the stirring reactor, the rotating speed of the stirrer is 50r / min, a...

Embodiment 3

[0050] Such as figure 1 As shown, this embodiment provides the specific steps of the method for using hydrogen peroxide and manganese dioxide to denitrify flue gas.

[0051] (1) Dilute the hydrogen peroxide with a mass ratio of 35% to 1.8% with water;

[0052] (2) Take 100kg of hydrogen peroxide from step (1) and put it into a stirred reactor through the liquid inlet 1. The structure diagram of the stirred reactor is as follows figure 1 , the volume of the stirred reactor is 200 liters, and the stirrer 7 of the stirred reactor is a propulsive stirrer, and a gas distributor 4 is arranged at the lower position of the stirrer 7, and the gas distributor 4 is connected with the gas inlet 3 of the stirred reactor, The upper part of the stirred reactor is provided with a gas outlet 5, a liquid inlet 1, and a powder inlet 2, and the bottom of the stirred reactor is provided with a liquid outlet 8;

[0053] (3) Start the stirring reaction kettle, the rotating speed of the stirrer is ...

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Abstract

The invention belongs to the technical field of flue gas denitration, and relates to a method for flue gas denitration by using hydrogen peroxide and manganese dioxide. According to the invention, manganese dioxide is utilized to activate hydrogen dioxide in water to generate active oxygen atoms, NO in the flue gas is oxidized by the oxygen atoms to form NO2, and the formed NO2 is immediately absorbed by water, that is, oxidation and absorption are carried out in the same environment at the same time, so that the problem that the oxidized NO2 is decomposed into NO and O2 due to untimely absorption in the existing oxidation technology can be solved, and the oxidation efficiency is improved. The NO removal effect is improved. The denitration effect is good, and compared with denitration through SCR and other oxidation methods, the cost is low; the method is novel in process design, convenient to operate and feasible.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification, and relates to a method for flue gas denitrification by using hydrogen peroxide and manganese dioxide. Background technique [0002] Solving the problem of air pollution has become an important issue in current social development. With everyone's joint efforts, the control of sulfur dioxide in the air has achieved remarkable results, but the pollution of nitrogen oxides in the air has progressed slowly. The current mature flue gas denitrification method is the SCR method, which has high operating costs and cannot solve the problem of ammonia escape. In order to overcome the shortcomings of reduction methods such as SCR, many technologies have carried out research and experiments on oxidation methods. Commonly used oxidants are ozone and hydrogen peroxide. However, due to the insufficient design of the oxidation process, the denitrification effect of the oxidation method is poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/78B01D53/56B01D2258/0283
Inventor 王一凡杨伯毅
Owner SHANDONG NORMAL UNIV
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