Absorbent for removing sulfur dioxide in flue gas and application thereof

Abstract

The invention provides an absorbent for removing sulfur dioxide in flue gas, which comprises the following components in percentage by weight: 25-30% of main absorption component, 0.01-0.1% of thermostable salt inhibitor and the balance of water, the main absorption component is a mixture of 4, 4 '-(1, 2-ethylidene) dimorpholine and 4, 4'-(oxybis (methylene)) dimorpholine. The absorbent provided by the invention has the characteristics of strong absorption performance, large absorption capacity, low cost, good regeneration effect, small generation amount of thermostable salt, delay of equipment corrosion and the like, and well overcomes the defects of the existing sulfur dioxide removal technology. The invention also provides a method for circularly removing sulfur dioxide in flue gas by using the absorbent. According to the method disclosed by the invention, the operation in an environment with a relatively high pH value is realized, and the requirements on equipment materials are reduced; and absorption desulfurization at a relatively high temperature is realized, so that the energy consumption of the process is reduced.

Description

technical field [0001] The invention relates to energy-saving and environmental protection industries, belongs to the field of waste gas separation and treatment, and in particular relates to an absorbent for removing sulfur dioxide gas in flue gas and its application. Background technique [0002] Sulfur dioxide (SO 2 ) is the simplest sulfur oxide in nature, which is harmful to human health. SO 2 It interacts with water vapor in the air to form acid rain, and the acid rain environment will acidify the soil and water to varying degrees; in addition, long-term inhalation of SO 2 Will affect human health. [0003] Current flue gas SO 2 The removal methods can be divided into three types: dry method, semi-dry method and wet method. Dry and semi-dry methods have disadvantages such as low desulfurization efficiency, high investment and operating costs, and a large amount of sulfate by-product. Wet desulfurization has great advantages in desulfurization efficiency, investme...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an absorbent and technology for removing sulfur dioxide in flue gas under conditions of higher temperature and higher pH value, so as to solve the shortcomings of existing sulfur dioxide wet removal technology and realize flue gas desulfurization Upgrading of devices for energy saving and emission reduction

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