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Device and method for liquid-phase adsorption-type redox-method flue gas denitration

A liquid phase adsorption and reduction technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., to achieve the effects of no reheating, simple equipment, and reduced operating costs

Inactive Publication Date: 2019-01-04
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a liquid-phase adsorption redox method flue gas denitrification device in view of the fact that various flue gas denitrification technologies are difficult to simultaneously achieve low cost and high efficiency. The removal efficiency of the present invention is high, reaching 90%. Above, and the cost is relatively low, the equipment is simple, easy to operate, no reheating, no catalyst, no secondary pollution

Method used

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Embodiment 1

[0048] like figure 1 As shown, a liquid-phase adsorption type redox method flue gas denitration bubbling method device has a flue 1, a pressurized induced draft fan 2, a bubbling denitrification tower 3 and a tail flue 9 which are connected in sequence. The bubbling denitrification tower 3 is equipped with a denitration mixed liquid 4, and a mist eliminator 5 is arranged at the top of the tower. The flue gas 1 is blown into the bubbling denitrification tower 3 after passing through the pressurized induced draft fan 2. The NOx in the flue gas is removed by the denitrification mixture 4. After denitration, the flue gas is demisted by the mist eliminator 5, and finally discharged through the tail flue 9. . The denitration mixed liquid 4 is connected to the denitration liquid buffer tank 6 through the denitration liquid conveying pipe 7, and the denitration liquid conveying pipe 7 can control the conveying amount of the denitration liquid. A feeding port is arranged at the top o...

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Abstract

The invention discloses a device and method for liquid-phase adsorption-type redox-method flue gas denitration. According to the method, after wet flue gas desulfurization (WFGD), boiler flue gas is fully in contact with a denitration mixed solution through bubbling or spraying or other modes, and NOx in the flue gas is adsorbed by an adsorbent in the denitration mixed solution at first and then has a redox reaction with a reducing agent, an oxidant and the like to form N2, CO2 and H2O to achieve the purpose of denitration. The reaction temperature range of liquid-phase redox denitrification is 20-80 DEG C, additional reheating is not needed, the mole ratio of hydrogen peroxide to NO is only 30-50%, the dosage of hydrogen peroxide is greatly reduced, and the running cost is greatly reduced. By means of the method, the denitration efficiency can reach 90% or above, the cost is relatively low, the equipment is simple, the operation is easy, reheating is not needed, no catalyst is needed,and secondary pollution is not generated.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment of coal-fired boilers, in particular to a device and method for flue gas denitrification by liquid phase adsorption redox method. Background technique [0002] With the rapid development of my country's economy and the steady improvement of people's living standards, my country's energy and electricity consumption and demand are increasing year by year. Due to the characteristics of China's energy resources rich in coal, poor in oil and little in gas, the supply of electricity in my country is mainly coal-fired thermal power generation, and in the process of coal combustion, smoke and dust, sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), carbon oxides (CO / CO 2 ), toxic heavy metals such as mercury (Hg), and pollutants such as volatile organic compounds (VOCs). Coal-burning pollutants have caused extremely serious pollution and damage to my country's atmospheric environment and ecolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56B01D53/12
CPCB01D53/12B01D53/56B01D53/79B01D2251/106B01D2251/2067B01D2253/102B01D2258/0283
Inventor 温正城陈江星李源
Owner HANGZHOU DIANZI UNIV
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