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Renewable flue gas desulphurization process

A desulfurization process and flue gas regeneration technology, applied in the direction of dispersed particle separation, chemical instruments and methods, separation methods, etc., can solve problems such as system blockage, high content of suspended impurities, and large loss of desulfurization solution, so as to prevent system blockage and improve Desulfurization effect, the effect of reducing desorption energy consumption

Active Publication Date: 2013-06-19
PANGANG GRP PANZHIHUA STEEL & VANADIUM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the desulfurization process of the prior art has many deficiencies, mainly as follows: high content of suspended impurities in the desulfurization solution, serious system blockage, low desulfurization rate, high desorption energy consumption, difficult recovery of desulfurization solution, low removal rate of strong acid radicals, etc.
In addition, since the sintering flue gas in the metallurgical industry has the characteristics of large dust content, high content of sulfur trioxide, chlorine, nitrate and other strong acid gases, when using the existing desulfurization process to remove the sintering flue gas When sulfur dioxide gas is present, the above-mentioned deficiencies will be more serious, and there will be further poor resin desalination effect and desulfurization caused by poor resin selectivity and large resin load when the resin is used to remove chlorine and nitrate under the condition of high sulfate content. Defects such as large loss of solution

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Examples

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Embodiment 1

[0056] Figure 1A A schematic diagram of a device for implementing a regenerative flue gas desulfurization process according to a first exemplary embodiment of the present invention is shown, Figure 1B A schematic diagram of a regenerative flue gas desulfurization process according to a first exemplary embodiment of the present invention is shown.

[0057] Such as Figure 1A As shown, the device for implementing this exemplary embodiment may include: an absorption system 100, which absorbs sulfur dioxide in the flue gas by making the lean liquid countercurrently contact with the flue gas to be treated in the absorption tower, and forms rich liquid and purified gas; desorption System 200, desorbs rich liquid through desorption tower and reboiler to form new lean liquid and desorbed gas; desulfurization solution purification and recovery system 300, removes impurity ions in desorbed lean liquid through resin desalination; desorption gas treatment System 600, using a desorptio...

Embodiment 2

[0072] Figure 2A A schematic diagram of a device for implementing a regenerative flue gas desulfurization process according to a second exemplary embodiment of the present invention is shown, Figure 2B A schematic diagram of a regenerative flue gas desulfurization process according to a second exemplary embodiment of the present invention is shown.

[0073] Such as Figure 2A As shown, the difference between the device for realizing this exemplary embodiment and the device for realizing Embodiment 1 lies in the following:

[0074] (1) The apparatus for realizing the present exemplary embodiment includes the washing system 500 . The flue gas washing system 500 is arranged before the absorption system, and is used for washing the flue gas containing sulfur dioxide that is about to enter the absorption system 100, so as to remove impurities such as dust contained in the flue gas. In addition, for the case where the temperature of the flue gas to be treated is relatively high...

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Abstract

The invention provides a renewable flue gas desulphurization process. The renewable flue gas desulphurization process comprises an absorption process and a desorption process. In the absorption process, the following steps are sequentially carried out according to the flowing direction of flue gas: absorbing oxysulfide in the flue gas by using a half-lean solution to form a first pregnant solution; further absorbing the oxysulfide in the flue gas by using a lean solution to form a second pregnant solution; catching a desulfuration solution carried in the flue gas by using a detergent; and discharging clean flue gas. The desorption process comprises the following steps of: carrying out first desorption on part of the first pregnant solution to form a half-lean solution and desorption gases; simultaneously carrying out second desorption on part of the first pregnant solution and part of the half-lean solution to form a lean solution and desorption gases; condensing and recycling oxysulfide in the desorption gases; and respectively supplying the other part of the half-lean solution and the lean solution for the absorption process so as to realize the circulation of the desulfuration solution between the absorption process and the desorption process. The renewable flue gas desulphurization process is suitable for processing various oxysulfide-contained flue gases or industrial waste gases.

Description

technical field [0001] The invention relates to the technical fields of chemical industry, thermoelectricity and metallurgy, and more specifically relates to a renewable flue gas desulfurization process. Background technique [0002] Currently, 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 to absorb sulfur dioxide in the flue gas, and then desorbs the sulfur dioxide in the amine liquid at high temperature to obtain sulfur dioxide gas with higher purity, and at the same time obtain the amine liquid that restores the ability to absorb sulfur dioxide, and the amine liquid can be recycled use. At present, there is also a desulfurization process that can be desorbed by ionic liquid, which is basically similar to the process of the above-mentioned amine desulfurization process. The difference between the two is that the components of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/96
Inventor 段向东张开坚张初永黎建明杨秀亮邱正秋朱玉萍王建山任毅陈翀罗义文罗强姚钦国
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM