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Technology for preparing desulfurizing agent ammonia water in sintering flue gas desulfurization by coking residual ammonia water

A technology for coking residual ammonia water and sintering flue gas, which is applied in the preparation/separation of ammonia, chemical instruments and methods, and separation of dispersed particles to achieve the effects of small impact, mature technology, and reduced treatment costs

Active Publication Date: 2010-06-02
中钢集团天澄环保科技股份有限公司
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Problems solved by technology

[0010] The purpose of this invention is to address the shortcomings of the existing coking waste ammonia used in sintering flue gas ammonia desulfurization technology, and propose a process for preparing ammonia water desulfurization agent in sintering flue gas desulfurization by using coking residual ammonia water

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  • Technology for preparing desulfurizing agent ammonia water in sintering flue gas desulfurization by coking residual ammonia water
  • Technology for preparing desulfurizing agent ammonia water in sintering flue gas desulfurization by coking residual ammonia water

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[0023] Below in conjunction with accompanying drawing, the present invention will be further described:

[0024] A process for preparing ammonia water desulfurization agent in sintering flue gas desulfurization by utilizing coking residual ammonia water, adopting coking residual ammonia water in the ammonia distillation tower 8 ammonia splitter 9 in the coking coal gas purification system as the desulfurizing agent ammonia water in sintering ammonia method flue gas desulfurization The source is to add a condensing cooler 13 after the ammonia distillation tower 8 and the ammonia splitter 9, and add a deacidification tower 6 before the ammonia distillation tower 8 and after the heat exchanger 5. The specific process steps are as follows:

[0025] (1), in the coking gas purification system, the remaining ammonia water in the remaining ammonia water storage tank 1 passes through the remaining ammonia water delivery pump 2, and after removing the tar through the tar remover 3, pass...

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Abstract

The invention relates to a technology for preparing desulfurizing agent ammonia water in sintering flue gas desulfurization by coking residual ammonia water. The technology cokes the residual ammonia water with an ammonia vaporizing tower 8 and an ammonia dephlegmator 9 in a coking gas purifying system, i.e. 15-20% of ammonia water which is generated by condensing ammonia vapour is taken as source of the desulfurizing agent ammonia water in the sintering ammonia flue gas desulfurization, has the advantages of mature technology, stable operation, stability, small modification work load, less investment and less influence to coking production, provides stable ammonia source for the sintering ammonia flue gas desulfurization, reduces the process cost of waste ammonia and the running cost of sintering desulfurization during the coking production, recycles harmful substance ammonia in residual ammonia water, and accords with the national circular economy and the sustainable development strategy.

Description

technical field [0001] The invention relates to a technique for utilizing coking residual ammonia water in sintering ammonia flue gas desulfurization, and in particular to a process for preparing ammonia water desulfurization agent for sintering flue gas desulfurization by utilizing coking residual ammonia water. Background technique [0002] At present, sulfur dioxide in the iron and steel industry is mainly produced by sintering and pelletizing flue gas, which accounts for more than 70% of the total emissions of iron and steel enterprises, and some enterprises reach about 90%. According to statistics, in 2008, the national key iron and steel enterprises emitted about 1.1 million tons of sulfur dioxide, of which the emission of sintering sulfur dioxide was about 800,000 tons. [0003] According to the requirements of the "Implementation Plan for Sintering Flue Gas Desulfurization in the Iron and Steel Industry" officially released and implemented by the Ministry of Industry...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/10B01D53/78B01D53/50
Inventor 游学明罗万钢朱俊杰李宁刘学军望西萍
Owner 中钢集团天澄环保科技股份有限公司
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