Zero-discharge water circulating system in lead smelting production process

Abstract

The invention discloses a zero-discharge water circulating system in a lead smelting production process. The system comprises a raw water supply system, a demineralized water producing system, a reverse osmosis primary concentrated water reuse system, a softened water producing system, an acidic wastewater and sewage treatment and reclaimed water reuse system and a production wastewater treatmentsystem which are sequentially connected, wherein the demineralized water producing system is connected with the softened water producing system through the reverse osmosis primary concentrated water reuse system. The invention provides the water circulating system with stepwise treatment and multimode reuse of production wastewater; the system is used for achieving the purpose of zero discharge ofthe production wastewater. The zero-discharge water circulating system is characterized in that the reverse osmosis primary concentrated water reuse system and the acidic wastewater and sewage treatment and reclaimed water reuse system are introduced, through direct reuse of the two kinds of production wastewater, the yield of the production wastewater is greatly reduced, then the concentrated water yield output by the production wastewater treatment system is reduced, coordination of production and consumption of concentrated water is achieved, and finally, zero discharge of a water system is achieved.

Description

technical field [0001] The invention belongs to the technical field of water circulation systems in the smelting process of nonferrous metals, and in particular relates to a zero-discharge water circulation system in the production process of lead smelting. Background technique [0002] In recent years, my country's lead smelting industry has made great progress, becoming the world's largest producer of refined lead and the second largest seller of refined lead after the United States. The lead smelting process is complicated, and the waste water is produced in a large amount. With the increase of environmental protection pressure, the zero discharge of the water system has gradually become an urgent research topic to be solved. In the water system of the lead smelting process, due to the influence of the large amount of production wastewater, the amount of concentrated water produced is large, and the amount of concentrated water produced by advanced wastewater treatment is...

AI Technical Summary

Problems solved by technology

The lead smelting process is complicated and the waste water is produced in a large amount. With the increase of environmental protection pressure, the zero discharge of the water system has gradually become an urgent research topic to be solved.

In the water system of the lead smelting process, due to the influence of the large amount of production wastewater, the amount of concentrated water produced is large, and the amount of concentrated water produced by advanced wastewater treatment is often unbalanced between production and consumption, resulting in increased water treatment costs and cannot be realized. Zero emission, which in turn restricts a series of issues such as production

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