Smelting waste acid concentrating system and method capable of achieving automatic effect body washing

Abstract

The invention relates to a smelting waste acid concentrating system and method capable of achieving automatic effect body washing. The system comprises a waste acid feed pipe, a concentrated-acid discharge pipe, a circulating pipe connected between the waste acid feed pipe and the concentrated-acid discharge pipe, an effect body washing unit and an effect body washing water recycling unit and is characterized in that the pipe section between the two connecting nodes of the waste acid feed pipe and the concentrated-acid discharge pipe is provided with an effect body circulating pump, the otherpipe section of the circulating pipe is provided with an effect body evaporator and a gas-liquid separator, the effect body circulating pump, the effect body evaporator and the gas-liquid separator are sequentially arranged long the conveying direction of the circulating pipe, one end of the effect body washing unit is connected with the effect body evaporator, the other end of the effect body washing unit is connected to the circulating pipe between the effect body evaporator and the gas-liquid separator, one end of the effect body washing water recycling unit is connected to the circulatingpipe between the effect body evaporator and the effect body circulating pipe, and the other end of the effect body washing water recycling unit is connected with the waste acid feed pipe. The method is performed through the smelting waste acid concentrating system. The system is simple and compact in structure, easy to operate, high in automation level, good in effect body washing effect and highin heat exchanging efficiency.

Description

technical field [0001] The invention mainly relates to the technical field of chemical technology, in particular to an automatic cleaning effect smelting sewage acid concentration system and method. Background technique [0002] During the industrial production of non-ferrous metal smelting, a large amount of dirty acid containing Ni, Cu, Cd, Pb, Fe, Na and other metal ions, As metal ions and dust will be produced. This kind of dirty acid has high acidity, strong corrosion and high toxicity, etc. features. In recent years, this kind of polluted acid is changing from the traditional "sulfurization-neutralization-advanced treatment" standard treatment and discharge process to the resource-based "impurity removal-concentration-reuse" process. [0003] Due to the complex composition and high impurity content of the polluted acid system, when using the recycling process to concentrate the polluted acid, with the continuous evaporation of water in the polluted acid, Na 2 SO 4 ,...

AI Technical Summary

Problems solved by technology

Due to the low temperature of industrial water, the washing effect of this process is not good, the water consumption is large, and the manual operation is high in intensity. The evaporation efficiency of the sewage acid concentrator is low, the unit consumption of steam and the operating cost of the system are high

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