Composite absorbent used for flue gas desulphurization

Abstract

The invention relates to the field of liquid-gas separation, especially to the field of flue gas desulphurization, specifically to a composite absorbent used for flue gas desulphurization. The objective of the invention is to provide a sulfur dioxide absorbent used for absorption of a membrane contactor. The composite absorbent used for flue gas desulphurization is composed of citrate and an aqueous solution of organic amine mixed according to a mol ratio of 1: 0.5-2. The composite absorbent has the advantages of good chemical stability, small foamability, small viscosity and a wide source, easy purchasing and a low price of raw materials. A desulphurization process using the composite absorbent has the advantages of a high mass transfer coefficient, no disturbance during flowing of gas and liquid, small mass transfer resistance, a high desulfurization rate, convenience in operation, great operational flexibility, no secondary pollution and stable running in the membrane contactor.

Description

technical field The invention relates to the field of liquid-gas separation, in particular to the field of flue gas desulfurization, and more specifically to a composite absorbent for flue gas desulfurization. Background technique SO in the flue gas of coal-fired power plants and metallurgical industries 2 It is one of the main pollutants in the atmosphere and the source of acid rain. With the increasing requirements of environmental protection on the emission of air pollutants, in the flue gas desulfurization purification, how to reasonably select the desulfurization process to achieve SO 2 Emissions in line with the national emission standards is a key issue for the healthy development of flue gas desulfurization in coal-fired power plants and metallurgical industries. Therefore, various high-performance SO 2 The development of absorbents is one of the research topics in this field. In recent years, composite absorbents have become a hot topic in the research and deve...

AI Technical Summary

Problems solved by technology

We absorb SO in the membrane 2 A lot of experimental research work has been done on composite absorbents, and novel and efficient composite absorbents have been proposed, which are currently used in flue gas purification of SO 2 There is no use and report in the field

Images