Zero discharge of electroplating wastewater What process technologies are needed
The so-called "zero emissions" refers to the unlimited reduction of air pollution and electric energy emissions until zero emissions. As far as the content of zero emission is concerned, first, control the imminent electric energy and resource emissions in the treatment process to reduce them to zero; Another meaning is that the flexible use of these forced electric energy and resources will kill the existence of non renewable energy and electric energy.
"Zero discharge" means that after the water in industrial production is used together, part of the highly extracted sewage (about 98%) containing salt and air pollutants is treated, and no wastewater is discharged. Salt in water and air pollutants are extracted, crystallized and discharged from the liquid water plant and sent to the landfill of the waste treatment plant or used as effective chemical raw materials. Omnidirectional sewage collection equipment, park the car on the blanket of the pavement, and operate a car wash shop on the blanket. The omnidirectional sewage collection equipment of the utility model is convenient to carry and has small storage area, but the sewage utilization rate is extremely low, so the actual effect on the surrounding air pollution is limited.
The water absorbing sponge type sewage collection equipment assembles several pieces of sponge into the same shape as the size of the car, stops the car on the assembled sponge, and then cleans the car. Although the actual effect of the sewage purchase of the water absorbing sponge type sewage purchase device of the utility model is better than the actual effect of the omni-directional sewage purchase device, the sewage can only be obtained according to the manually extruded water absorbing sponge, which is time-consuming and laborious. In addition, the water absorbing sponge type drainage board can not seal the chassis of the car body very well, which endangers the drainage to a certain extent.
Large and medium-sized storage tray: place a large and medium-sized storage tray directly below the car frame to be cleaned, and place a large and medium-sized storage tray. The electroplating factory has zero discharge. The large and medium-sized storage tray can not cover the chassis of the car body well under the condition of high sewage utilization rate, and because the structure is fixed, it can not meet all car systems. So now it is necessary to have such a high utilization rate of waste water. A good enclosure for the car body chassis can meet the requirements of all car washing sewage purchase equipment.
On the basic principle, the combined process of "membrane pressing extraction+MVR volatile" has a very ideal effect on the organic chemical air pollutants and salinity of the traditional membrane processing wastewater. Most of the atmospheric pollutants and salinity Z enter the MVR volatile module dregs, so that the quality of the membrane pressing solution and MVR volatile module coolant is very good, It can be recycled immediately or recycled after simple deep hydrolysis, and gradually realize zero discharge of sewage.
