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Process for purifying desulfurization solvent in flue gas desulfurization of solvent circulating absorption method

A solvent circulation and purification process technology, applied in the field of flue gas desulfurization, can solve the problems of reducing the desulfurization efficiency and regeneration effect of the desulfurization solvent, threatening the normal operation of the desulfurization device, equipment failure, etc., to promote application and development, and ensure stability and effectiveness. performance, improve reliability

Active Publication Date: 2013-07-31
成都华西工业气体有限公司
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Problems solved by technology

The gradual accumulation of the above-mentioned impurities in the desulfurization solvent will change the composition of the desulfurization solvent, which will greatly reduce the desulfurization efficiency and regeneration effect of the desulfurization solvent, and may cause equipment failure due to dust clogging and other reasons, thereby threatening Normal operation of the desulfurization unit

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  • Process for purifying desulfurization solvent in flue gas desulfurization of solvent circulating absorption method

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Embodiment 1

[0023] Taking the purification of desulfurization solvent in sintering flue gas desulfurization by solvent circulation absorption method in a steel plant as an example, combined with figure 1 The present invention will be described.

[0024] Desulfurization solvent lean liquid absorbs SO in flue gas in desulfurization system 2 A desulfurization solvent-rich liquid with a temperature of about 52°C is formed. The rich liquid passes through a bag-type rich liquid filter to filter out solid residues, then passes through a lean-rich liquid heat exchanger for heat exchange, and then enters a thermal regeneration system for heating and regeneration. During the heating process, the SO absorbed by the rich solution 2 with high purity SO 2 Desorbed in the form of desulfurization and sent to post-processing, the rich liquid can be regenerated into a desulfurization solvent lean liquid at about 100 °C. After the lean solution is filtered through a bag-type insulation filter to remove s...

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Abstract

The invention discloses a process for purifying a desulfurization solvent in flue gas desulfurization of a solvent circulating absorption method. The desulfurization solvent is sequentially subjected to the treatment steps of rich solution filtration, barren solution heat insulation filtration, precipitation, pressure filtration and the like, so that removal and purification of main impurities such as dust, SO4<2->, metal positive ions and the like in the desulfurization solvent are realized, reclamation of effective composition substances in the desulfurization solvent is taken into consideration in the purification process, and the process for purifying the desulfurization solvent in the flue gas desulfurization of the solvent circulating absorption method is formed, wherein the processhas high purification degree, high stability and low energy consumption and is easy to operate. The technical contents can be widely applied in the field of flue gas desulfurization of the industriesof steel, nonferrous metallurgy, fired power, chemical engineering, building materials and the like.

Description

technical field [0001] The invention relates to a process for purifying desulfurization solvent used in flue gas desulfurization by solvent circulation absorption method, which is mainly applicable to flue gas desulfurization in iron and steel, nonferrous metallurgy, thermal power, chemical industry, building materials and other industries. Background technique [0002] At present, there are many flue gas desulfurization methods used in China, such as limestone-gypsum method, double alkali method, ammonia method, magnesium oxide method and so on. With the development of technology, the flue gas desulfurization technology of solvent circulation absorption method that has appeared in recent years has been widely valued and developed at home and abroad because of its short process flow, recyclable desulfurization solvent, and high economic value of desulfurization by-products. . [0003] At present, the desulfurization solvents that can be used for flue gas desulfurization by ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 李东林郎治肖九高汪志和
Owner 成都华西工业气体有限公司
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