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Method for removing heat-stable salt in flue gas desulfurization solution by normal-pressure ion exchanger

An ion exchanger, a technology of thermally stable salts, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., to achieve high desalination efficiency, low entrainment loss, and environmental friendliness.

Active Publication Date: 2013-02-06
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0010] In view of the above-mentioned deficiencies in the prior art, one of the purposes of the present invention is to provide a resin desalination method that can overcome the problems of serious entrainment loss of desulfurization liquid and low desalination efficiency when the ion exchanger is operated under normal pressure.

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  • Method for removing heat-stable salt in flue gas desulfurization solution by normal-pressure ion exchanger

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Embodiment Construction

[0025] Hereinafter, the method for removing thermally stable salts in the flue gas desulfurization solution by the atmospheric pressure ion exchanger of the present invention will be described in conjunction with exemplary embodiments.

[0026] In an exemplary embodiment of the present invention, the flue gas desulfurization solution to be treated is produced by a flue gas desulfurization system comprising an absorption tower and a desorption tower containing SO 4 2- and Cl - The desulfurization solution, the method for removing thermally stable salts in the flue gas desulfurization solution by an atmospheric ion exchanger includes the following steps in sequence: A. Let the flue gas desulfurization solution pass through the ion exchanger in a manner of going in and out from the bottom to remove the flue gas SO in gas desulfurization solution 4 2- and Cl -Waiting for thermally stable salts to obtain a purified flue gas desulfurization solution; B. Venting the ion exchanger...

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Abstract

The invention provides a method for removing heat-stable salt in a flue gas desulfurization solution by a normal-pressure ion exchanger. The method can purify the flue gas desulfurization solution under normal pressure, the clamping loss of the desulfurization solution is low and the desalting efficiency is high; and purification treatment of the flue gas desulfurization solution is organically combined with a flue gas desulfurization system, so that the utilization rate of the desulfurization solution and the utilization rate of a regenerated waste solution are improved and the method is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of ion exchange purification, in particular to a method for removing impurities such as anions in a desulfurization solution by using a normal-pressure ion exchanger. Background technique [0002] In the prior art, the iron and steel industry is one of the industries that cause serious air pollution, and the sintering process is the main source of pollution in the iron and steel industry. In recent years, more and more sinter plants have installed flue gas desulfurization systems to reduce SO emissions 2 , part of which uses a wet process to remove sulfur oxides (eg, sulfur dioxide and sulfur trioxide) from flue gas. [0003] For example, the commercial website of Cansolv Co., Ltd. (http: / / www.cansolv.com / cn / so2scrubbingschema.ch2) discloses a desorbable flue gas desulfurization process. The process first uses amine liquid as a flue gas desulfurization solution (referred to as desulfurization solution) to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/04B01D53/14
Inventor 王建山黎建明张小龙邱正秋王刚邹维嘉
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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