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Regenerating system and technique for three-tower waste aid

A regeneration system and waste acid technology, applied in chlorine/hydrogen chloride purification, chlorine/hydrogen chloride, dispersed particle separation, etc., can solve problems such as unstable iron powder quality, difficult process control, complex equipment structure, etc., to achieve a simple and reasonable structure , operation simplification, and the effect of ensuring operation safety

Inactive Publication Date: 2008-07-09
成都阿斯特克国龙环保工程有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to provide a three-tower waste acid regeneration system and process. This system solves the problems of complex equipment structure, difficult process control, and unstable quality of iron powder in the acid regeneration project, and reduces the engineering cost. Construction cost and period, production safety, improve production efficiency

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  • Regenerating system and technique for three-tower waste aid

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and the present invention is further described.

[0028] The pickling waste from the pickling unit is collected in a spent acid tank whose storage capacity allows the regeneration unit to work independently of the pickling unit.

[0029] The acid in the acid storage tank is pumped to the spent acid filter, where solid particles and undissolved residues from the pickling operation are separated from the acid liquor.

[0030] The waste acid enters the pre-desilication unit through a pneumatically operated valve (see the process description of the pre-desilication unit). The waste acid liquid after pre-desiliconization and purification is collected and mixed in the purified waste acid tank in the tank area. The waste acid after pre-desiliconization enters the Venturi separator through a pneumatically operated valve, and the liquid level of the Venturi separator is automatically controlled by the pneumatic valve. The acid flo...

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Abstract

The invention discloses a three-tower waste acid regeneration system which is characterized in that: (1)the system includes a waste acid filter, a roaster, an iron oxide cabin, a cyclone separator, a Venturi separator, an absorption tower I, an absorption tower II and a waste gas scrubber; (2)the waste acid filter is connected with the Venturi separator and the roaster by pipelines; the iron oxide cabin is connected with the bottom end of the roaster; the cyclone separator is connected with the gas outlet of the roaster and the gas inlet of the Venturi separator; the absorption tower I is connected with the Venturi separator; the absorption tower II is connected with the absorption tower I; the waste gas scrubber is connected with the absorption tower II by a negative pressure fan and a separator. The system solves the problems of complicated equipment structure, uncontrollable technical process, unstable quality of iron power, etc., in acid regeneration engineering, reduces the construction cost and the construction cycle of the engineering, realizes safety production and improves the production benefits.

Description

technical field [0001] The invention relates to the technical field of waste acid regeneration, in particular to a three-tower waste acid regeneration system and process. Background technique [0002] The spray roasting method and the regeneration device have been proved to be an effective and feasible waste acid treatment process in the iron and steel industry at this stage. In the cold-rolling pickling factory, when using hydrochloric acid to pickle the steel plate, the iron oxide on the surface of the plate is washed off by hydrochloric acid to form ferrous chloride or ferric chloride is dissolved in the pickling solution, and the pickling solution goes along with the pickling process. The concentration of iron ions in the solution will increase and the concentration of free HCL will decrease accordingly. In order to maintain the concentration of free HCL in the acid pickling solution and remove the increased iron ions in the acid solution, the waste acid solution is qua...

Claims

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Application Information

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IPC IPC(8): C01B7/07B01D53/78
Inventor 龙国平
Owner 成都阿斯特克国龙环保工程有限公司
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