De-sulfur method with reproducible desulfurizer for preparing sulfuric acid as final product

A final product, desulfurizer technology, applied in the direction of separation methods, chemical instruments and methods, sulfur compounds, etc., can solve the problems of large initial investment, waste of functions, waste of energy, etc., to eliminate waste, reduce condensation, size and weight Reduced effect

Inactive Publication Date: 2010-06-09
SHANDONG PROVINCE METALLURGICAL ENG CO LTD
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  • Abstract
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Problems solved by technology

[0009] The problem to be solved by the present invention is the problem of double waste of energy,

Method used

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  • De-sulfur method with reproducible desulfurizer for preparing sulfuric acid as final product

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Embodiment Construction

[0028] The specific implementation manner of the present invention can be described in conjunction with Embodiment 1, namely the accompanying drawings.

[0029] The main process flow of this embodiment is as follows: the flue gas to be desulfurized enters the pretreatment tower 2 from the inlet pipe 1, and in the pretreatment tower 2, the flue gas to be desulfurized is usually washed and cooled. Since the cooling water circulation and treatment system equipped for the pretreatment tower 2 belong to basic common sense, they are not shown. The pretreated flue gas to be desulfurized is sent to the lower part of the absorption tower 4 through the pipeline 3, and the SO in it is absorbed by the lean liquid that is further cooled to the technological requirement. 2 , and then discharged through the flue gas discharge pipe 5 after desulfurization. As the above-mentioned process continues, the lean liquid in the absorption tower 4 gradually becomes rich liquid, and is sent to the des...

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Abstract

The invention provides a de-sulfur method with reproducible desulfurizer for preparing sulfuric acid as a final product, comprising the steps of the pretreatment of desulfurized flue gas, the absorption of SO2, the desorption of desulfurizer, the recycling of SO2, the preparation of sulfuric acid and the like. The method is characterized in that the endogenetic steam of a desorption tower is replaced by thermal process gas with the oxygen content being greater than 10%; the desorption energy is mainly provided by the absorption solution entering the desorption tower; the volume percentage concentration of the SO2 in the mixed gas exhausted from the desorption tower is controlled to be greater than or equal to 3%. The method provided by the invention solves the problems of dual waste of energy, function surplus, and big primary investment existing in the prior art to meet the needs of desulfurization projects of different types, meanwhile, the method is especially adaptable for the desulfurization system of a sintering machine.

Description

technical field [0001] The invention relates to a regenerable desulfurization method whose final product is sulfuric acid. Background technique [0002] The desulfurization method in which the desulfurizer can be regenerated is currently being promoted and applied. It is exploited on SO 2 The amine liquid or ionic liquid with strong selective absorption will absorb SO in the absorption tower 2 Capture and release it in the desorption tower to regenerate the amine liquid or ionic liquid to realize its reuse. The method includes the pretreatment of the flue gas to be desulfurized (the current common practice is to wash and cool etc.), SO 2 Absorption of desulfurizer, desorption of desulfurization agent and SO 2 recycling and other steps. [0003] The regenerable desulfurization method whose final product is sulfuric acid desulfurizer belongs to the extension of the above-mentioned process. It includes the pretreatment of flue gas to be desulfurized (currently, the usual ...

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Application Information

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IPC IPC(8): B01D53/50B01D53/14C01B17/56
Inventor 姚朝胜魏新民黄东生潘永涟王忠汤楚贵钱纲
Owner SHANDONG PROVINCE METALLURGICAL ENG CO LTD
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