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Method for desorbing acidic gas by oxidization process

A technology of acid gas and oxidation method, which is applied in the direction of chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as low efficiency, achieve the effects of reducing load, improving removal efficiency, and facilitating promotion

Inactive Publication Date: 2011-12-07
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More importantly, if the sulfur and nitrogen with very low content are removed in the main phase, the efficiency will be low

Method used

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  • Method for desorbing acidic gas by oxidization process
  • Method for desorbing acidic gas by oxidization process
  • Method for desorbing acidic gas by oxidization process

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Embodiment Construction

[0026] The present invention is described in detail as follows with reference to accompanying drawing:

[0027] As shown in the figure, A is the first adsorption tower, and B is the second adsorption tower. 1 is an air filter, 2 is a blower, 3 is a heater, and 4 is an induced draft fan.

[0028] absorb

[0029] After the mixed gas to be treated is washed with water to remove dust and cooled, it enters the absorption tower from the bottom under the condition of normal pressure and not higher than 60°C (normal temperature to 60°C), and the hydrogen peroxide is sprayed from the top of the tower to combine with the SO in the mixed gas 2 / NO x The reaction occurs, and the generated acid liquid is discharged from the bottom of the tower into the neutralization tower, and the tail gas after absorption is discharged from the top of the tower.

[0030] neutralize

[0031] The acid liquid discharged from the absorption tower reacts with ammonia water in the neutralization tower to o...

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Abstract

The invention provides a method for desorbing an acidic gas by an oxidization process and relates to desorption of SO2 and NO(x) in a CO2 system. The acidic gas consisting of the SO2 and the NO(x) is oxidized by hydrogen peroxide serving as an oxidant and dissolved in water to form acid, so that the acidic gas can be separated from other gases. According to the concentration of the acidic harmfulgas in the system, a suction process and an absorption process are adopted respectively. As the CO2 does not take part in the reaction, the load of the deacidified gas as well as the investment and energy consumption cost are reduced. The acidic solution is converted into a fertilizer after being treated by ammonia water, so that secondary pollution is avoided and an additional value of the process is increased; therefore, the method is particularly suitable for desorption of a little of sulfur oxide and nitric oxide.

Description

technical field [0001] The invention relates to a method for removing acid gas by oxidation, which is applied to the environmental protection technology in the energy field and the chemical / petrochemical field to meet the needs of power plant flue gas, coal-fired boilers, sulfuric acid industry, iron and steel industry, metallurgical industry, petrochemical industry and Coal-fired industrial kilns and other industries need to remove acid gases, especially for CO 2 SO in the system with higher content 2 and NO x capture. Background technique [0002] Coal is still the subject of the world's energy structure, especially in my country. 80% of my country's electricity is produced by burning coal. A serious consequence of burning coal is the emission of acid gases. my country's 2009 environmental report [Bulletin on Environmental State of China in 2009: Atmospheric Environment, Ministry of Environmental Protection, May19, 2010] pointed out that there are 2.21×10 7 t SO 2 I...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/60
CPCY02A50/20
Inventor 周理智永婷孙艳苏伟周亚平
Owner TIANJIN UNIV
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