Smoke desulphurization agent and smoke desulphurization method

Abstract

The invention provides a smoke desulphurization agent. The desulphurization agent is aqueous solution containing a main absorption component, an activating agent, an anti-oxidation component and acid, wherein the main absorption component is one or more of alkyl piperazine, hydroxyalkyl piperazine and hydroxyalkyl piperazine ketone; the activating agent comprises piperazine and diazabicyclo; and the anti-oxidation component is at least one of 4-tert-butyl catechol, 2,6-di-tert-butyl-p-phenylcresol, acetone oxime and N,N-bi (2-ethoxy) glycine. The smoke desulphurization agent provided by the invention can remove and reclaim sulfur dioxide in the smoke, and has higher desulphurization rate; moreover, even if the smoke desulphurization agent is strongly oxidized and then is recycled, the absorption capacity for the sulfur dioxide is still stable; and in addition, the rich liquor formed by desulphurization after adopting the desulphurization agent has better desorption performance such ashigh desorption rate.

Description

technical field [0001] The invention relates to a flue gas desulfurizing agent and a method for using the flue gas desulfurizing agent to carry out flue gas desulfurization. Background technique [0002] The acid rain formed by sulfur dioxide and other acid gases has brought serious damage to industrial and agricultural production and seriously polluted the environment. With the gradual popularization of scientific development concepts such as "circular economy, clean production, and harmonious society", the country's increasing emphasis on air pollution caused by sulfur dioxide, and the formulation and implementation of relevant environmental protection laws and regulations, the control of flue gas pollution containing sulfur dioxide work is imperative. [0003] The development of flue gas desulfurization technology has a history of 100 years. There have been more than 140 kinds of process technologies, of which more than 10 have been applied in industry. The basic princip...

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Problems solved by technology

[0002] Acid rain formed by sulfur dioxide and other acidic gases has brought serious damage to industrial and agricultural production and seriously polluted the environment

However, the above two desulfurizers are only suitable for flue gas that does not contain oxygen or has a very low oxygen content, because the above patents all contain hydroxyethyldiamine, so there is a phenomenon of degradation in an oxygen atmosphere

[0006] CN 101274204A uses organic cations and inorganic anions as main absorbents, and alkanolamines with sterically hindered amines as activators, which suppresses the above-mentioned degradation phenomenon to a certain extent. However, the desulfurization solution has slow absorption speed and desulfurization Disadvantages of low desorption rate, low desorption rate, high desorption energy consumption and significant decrease in absorption capacity during recycling