System for negative pressure concentration treatment of electroplating waste water

Abstract

The invention discloses a system for the negative pressure concentration treatment of electroplating waste water. The system comprises a triple-effect evaporator, a condenser, a condensing basin, a cold water tank, a vacuum machine group, a precipitating tank and a centrifugal, wherein the condenser, the condensing basin and the precipitating tank are respectively connected with the triple-effect evaporator, the condenser is connected with the cold water tank, the precipitating tank is connected with the centrifugal, and the cold water tank is connected with the vacuum machine group. Through the mode, the electroplating waste water which is obtained after drug neutralization and precipitation is treated again by the system for the negative pressure concentration treatment of the electroplating waste water, which is provided by the invention, through the combination of the triple-effect evaporator and the centrifugal, and metal salt and other impurities in the waste water are cleared and reclaimed so as to promote the treated waste water to meet draining standards or be reutilized. A circulating heat source is provided by externally connected stream. The treatment cost is low, and the purposes of energy saving, emission reducing and environment protecting are achieved.

Description

technical field [0001] The invention relates to the technical field of electroplating wastewater treatment, in particular to a negative pressure concentration treatment system for electroplating wastewater. Background technique [0002] Electroplating wastewater is a variety of wastewater discharged during the electroplating production process, mainly including plating cleaning water, waste electroplating solution, washing workshop floor water, scrubbing plate washing water, ventilation equipment condensate, and plating tank leakage or improper operation and management. All kinds of tank liquid and drainage caused by "running, escaping, dripping, and leaking". Electroplating wastewater contains a certain amount of salt, free acid and organic compounds, including various metal sulfates, chlorides, fluoroborates, etc., which need to be treated before they can be discharged. [0003] Heavy metals in electroplating wastewater are difficult to treat, and it is difficult to achie...

AI Technical Summary

Problems solved by technology

[0003] Heavy metals in electroplating wastewater are difficult to treat, and it is difficult to achieve zero discharge of heavy metals in wastewater by general chemical methods, physical methods, activated sludge methods, biofilm methods, and anaerobic biological methods. If these wastewaters are not thoroughly treated and discharged in In the river, it will lead to the pollution of the ecological environment, through the continuous spread of animals, plants and water flow, and even endanger human health

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