In recent years, with the continuous improvement of environmental protection industry, electroplating sewage treatment equipment has been developed rapidly to a certain extent. Technical transformation shall be carried out for major sewage treatment equipment manufacturing enterprises to improve their production capacity and manufacturing level. The production level of special equipment for urban sewage treatment and its supporting general equipment has been greatly improved, and there will be broad development prospects in the future. Foreground. Electroplating is the use of chemical and electrochemical methods on the surface of metals or other materials of various metals.
Electroplating wastewater treatment equipment It is the key equipment for metal processing wastewater treatment in electroplating plant. It is widely used in zinc plating, silver plating, copper plating, nickel plating wastewater treatment and other industries. Equipment can be customized according to the characteristics of different wastewater, which contains a large number of harmful substances. If untreated, it will cause large-scale pollution to the surrounding environment. Due to certain needs, wastewater generated from electroplating operation can be customized. Recycle water, eliminate sludge and reduce pollution to surrounding rivers and environment.
1。 For the purified water treatment part (the design target is 20-30%, generally 30%), the air is mixed with the air in the pressurized water inlet tank through the flotation circulating pump, and the air is dissolved in water. At this time, the air dissolution efficiency is more than 80%.
2。 The air in the dissolved air tank is controlled by the automatic liquid level controller and automatically added to the dissolved air tank.
3。 Dissolved air - water from the dissolved air tank. At this time, the pressure of dissolved air tank is 0.3-0.4 MPa. The dissolved air-water pressure is released to zero or negative pressure through the releaser. The dissolved air in the water is released from the water to form micro bubbles with a particle size of 20-50um. When microbubbles combine with suspended solids in sewage, some microbubbles grow directly in suspended solids and suspended solids are released directly. The proportion of sewage drops until it floats to the surface of water body.
4。 A large amount of scum is formed, and then the chain foam scraper is installed on the air flotation tank to remove scum;
5。 The clean water at the bottom of the flotation cell enters the flotation cell through the water collecting pipe. After being used as the refluxing dissolved air water, the electroplating wastewater treatment equipment can directly discharge or enter the post-treatment equipment.
Scope of application:
1。 Separate fine suspended solids and algae from surface water.
2。 Recycle useful substances in industrial wastewater, such as pulp in papermaking wastewater.
3。 Separation and concentration of suspended solids in water, such as sludge, rather than secondary clarifiers.
4。 It is suitable for suspended solids, coagulation flocs and oil-water separation applications in municipal, paper making, chemical, beverage, printing and dyeing, textile, oil refining, electroplating, food, slaughtering, leather and other industries.
Electroplating wastewater has complex composition, which can be divided into inorganic pollution and organic pollution. Water sanctions have become a very large degree. There are many kinds of wastewater pollutants in each unit, and the CODcr change coefficient is large. If discharged directly without treatment, it will cause serious pollution to the surrounding water body. Electroplating industry is one of the three major polluting industries in the world today. The development trend of electroplating sewage treatment equipment is to completely eliminate pollution and strive to achieve zero discharge. In the future treatment of electroplating wastewater, reasonable treatment methods should be selected from the actual situation to carry out economic and effective comprehensive prevention and control of electroplating wastewater, and strive for the coordination and unification of environmental benefits, economic benefits and social benefits to truly achieve cleaner production.
