In today's society, water resources are becoming increasingly precious. If electroplating plants want to achieve sustainable development, they must pay attention to water usage.
Author: Marisa
I. Water usage in electroplating plants
In today's society, water resources are becoming more and more precious. If electroplating plants want to achieve sustainable development, they must pay attention to water use. In the electroplating process, the amount of water used is quite large, including cooling, precipitation, washing, plating solution and other links. Among them, the washing and rinsing process consumes the most water, accounting for more than 60% of the total water consumption.
II.Water saving methods in electroplating plants
1. Reduce the number of washing times
When the plating solution is in good condition, reducing the number of washing times can reduce the water consumption of the electroplating plant and will not have a negative impact on product quality. In addition, by optimizing the process flow and streamlining the rinsing process, the purpose of saving water can also be achieved.
2. Water reuse technology
For some circulating washing water or wastewater with good water quality, water reuse technology can be used to recycle it, reduce emissions, and achieve the effect of saving water. This method can reduce water treatment costs and reduce environmental pollution.
3. Wastewater treatment
Wastewater treatment is an important means of saving water in electroplating plants. Treating wastewater by chemical precipitation, biological treatment, coagulation and sedimentation can not only clean the wastewater, but also recycle the wastewater to reduce pollution emissions. However, it should be noted that the wastewater treatment technology needs to be flexibly selected according to the actual situation, and different wastewaters need to be treated by different methods.
4. Heat exchange recovery technology
In the electroplating process, many links need to be cooled, and this process also consumes a lot of water resources. The use of heat exchange recovery technology can recycle the waste heat generated during the cooling process and reduce the amount of water used.
III. Introduction to water treatment technology
1. Chemical precipitation method
Chemical precipitation method refers to adding a certain amount of precipitant to the wastewater to make the turbid substances or ions in the wastewater generate relatively large solid precipitates, which can be used for seriously polluted wastewater.
2. Activated carbon adsorption method
Activated carbon adsorption method refers to the physical action between non-polar substances and organic pollutants, allowing them to voluntarily gather together to form an organic membrane, thereby separating the organic matter in the wastewater.
3. Membrane technology
Membrane technology refers to the method of separating wastewater containing suspended matter, colloids and macromolecular organic matter by membrane filtration to achieve the effect of purification.
IV. Summary
When using water resources in daily life, electroplating plants can consider using water conservation, water reuse, wastewater treatment, heat exchange recovery technology and other methods to reduce costs. At the same time, they can also use a variety of water treatment technologies to achieve wastewater purification. By using water resources reasonably, the water cost of the electroplating industry can be fundamentally reduced, water resources can be protected, and environmental pollution can be reduced.