Electroplating wastewater treatment equipment Process characteristics.

Electroplating is a technological process that uses electrochemical methods to modify the appearance of metals and nonmetals, protect and obtain new functions. It is an indispensable technical link in many industrial sectors. According to the preliminary statistics of 47 cities in China during the "Seventh Five Year Plan" period, there are more than 5870 electroplating plants. In 1987, there were more than 530 electroplating plants in Shanghai, and the total number of electroplating plants in China is estimated to be nearly 10000. In the production process, these electroplating plants will not only produce various rinsing wastewater, but also discharge various waste liquids.

The waste water and liquid waste contain acid, alkali, CN, Cr6+, Cd2+, Cu2+, Ni2+, Pb2+, Hg2+and other metal ions and toxic substances, as well as benzene, nitro, amine and other toxic organic substances, seriously endangering the survival of organisms. Electroplating technology has caused serious pollution and was listed by the Chinese government as one of the 25 restricted professions in 1994. However, judging from the current situation at home and abroad, Electroplating wastewater treatment equipment Skill is an indispensable part of modern industry. It is not the tendency to replace other skills in an all-round way, but to develop new skills and technologies and devote to the prevention and control of electroplating pollution.

The management of electroplating wastewater has been paid attention to at home and abroad, and many management skills have been developed. The management of electroplating wastewater in China started early. Since the early 1960s, it has been nearly 50 years. From the 1960s to the mid-1970s, the treatment of electroplating wastewater has attracted much attention, but it is still in the stage of simple discharge control. From the mid-1970s to the early 1980s, most electroplating wastewater has been treated effectively. Ion exchange, membrane transpiration concentration and other processes are applied nationwide, and reverse osmosis, electroosmosis and other processes have entered the stage of industrial application.

Great progress has also been made in the recovery of valuable substances in waste water and the recovery and application of water. From the 1980s to the 1990s, the pollution control skills in the 1990s and the summary of prevention and control research have achieved gratifying results. Since the 1990s, the management of electroplating wastewater has been carried out in the direction of technical reform, recycling and closed-circuit circulation. The resource recovery skills combined with multiple combined treatment and automatic operation have become the mainstream of electroplating wastewater management.