Treatment recycling process of hydrochloric acid liquid waste produced in rare metals extraction process

A technology of hydrochloric acid waste liquid and extraction process, which is applied in the direction of chlorine/hydrogen chloride purification, chlorine/hydrogen chloride, etc., can solve the problems of large power consumption, reduce production costs, save heat energy, and solve the effects of environmental protection

Inactive Publication Date: 2012-08-01
常熟市新港农产品产销有限公司
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Problems solved by technology

This method has some advantages such as simple equipment, high recovery rate, but large power consumption

Method used

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Embodiment Construction

[0021] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0022] A treatment and reuse process for hydrochloric acid waste liquid produced in the rare metal extraction process, comprising:

[0023] (1) Filter the hydrochloric acid waste liquid in the waste acid storage tank through the filter tube, and introduce it into the multi-effect heating evaporation system. Multi-effect evaporation: each effect evaporation system consists of a heating chamber and an evaporation chamber; in each effect, the waste Hydrochloric acid circulates between the heating chamber and evaporation, and the low-concentration hydrochloric acid waste liquid is evaporated sequentially through the first effect, the second effect, and the third effect to obtain a concentrated liquid...

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Abstract

The invention discloses a treatment recycling process of hydrochloric acid liquid waste produced in a rare metals extraction process, which belongs to the technical field of hydrochloric acid liquid waste treatment. The treatment recycling process adopts a multiple-effect evaporation mode to achieve evaporation of the hydrochloric acid liquid waste, greatly saves heat energy, achieves extraction recycling of products, simultaneously guarantees reduction of production cost, achieves recycling utilization of heavy metal elements in the hydrochloric acid liquid waste and solves the problem of environmental protection.

Description

technical field [0001] The invention relates to the technical field of hydrochloric acid waste liquid treatment, in particular to a treatment and reuse process for hydrochloric acid waste liquid generated in the rare metal extraction process. Background technique [0002] At present, the hydrochloric acid waste liquid is usually treated by adding alkaline neutralization method, that is, adding alkaline substances to the waste acid liquid to increase its pH value, and the acid liquid is neutralized while the heavy metal ions in it are combined with hydroxide ions to precipitate , and then carry out solid-liquid separation and removal, the waste water is directly discharged, and the waste residue is directly landfilled. This method is simple and easy to implement, so it is accepted by many sewage enterprises, but this method treats the waste acid liquid containing valuable resources such as hydrochloric acid and heavy metal ions as waste and discharges it after treatment, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07
Inventor 张祖学
Owner 常熟市新港农产品产销有限公司
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