To put it bluntly, zero emission refers to the theme activity of infinitely reducing air pollutants and power energy emissions until zero. Zero emission, as far as its content is concerned, first, it is necessary to control the power energy and resource emissions caused by necessity in the processing process to reduce them to zero; Another implication is to flexibly use these forced discharge electric energy and resources, and finally kill the existence of non renewable energy and electric energy. The "zero discharge" of sewage means that after the industrial production water has been used together, a part of salt content and air pollutants are highly extracted into sewage (about 98%) for purchase and reuse, and no waste water is discharged out of the processing plant. Salt and air pollutants in water are discharged from the plant in liquid form after being extracted and crystallized, and sent to the waste treatment plant for landfill or purchased as effective chemical raw materials.
At present, there are three kinds of common sewage purchase equipment in the car washing industry:
1. All around sewage purchase equipment, park the car on the blanket paved on the road, and carry out car washing shop on the blanket. This kind of omni-directional sewage purchase equipment is convenient to take, and the total storage area is small, but the sewage utilization rate is extremely low, so the actual effect on reducing nearby air pollution is limited.
2. The water absorbing sponge type sewage purchase equipment pieces together several pieces of sponge to produce the appearance equivalent to the size of the vehicle, stops the vehicle on the pieced sponge, and then carries out vehicle cleaning. Although the actual effect of the sewage purchase of this kind of absorbent sponge type sewage purchase equipment is better than that of the omni-directional sewage purchase equipment, the sewage can only be obtained by extruding the absorbent sponge according to the manual service, which is time-consuming and laborious, and the absorbent sponge type sewage purchase equipment can not carry out a very good enclosure on the car body and chassis, The acquisition of sewage must be jeopardized horizontally.
3. Large and medium-sized storage and sorting disks. Place a large and medium-sized storage and sorting disk directly below the car body and chassis of the car to be cleaned, Zero discharge of electroplating wastewater The sewage utilization rate of this kind of large and medium-sized storage and sorting tray is high, but it can not carry out a very good enclosure for the chassis of the car body, and because the structure is fixed, it can not meet all vehicle systems. Therefore, it is necessary to use this kind of equipment with high sewage utilization rate, carry out a very good enclosure for the chassis of the car body and satisfy the sewage purchase equipment of the car washing shop of all car lines.
From the basic principle, the "high pressure membrane extraction+MVR volatilization" composition process has a very ideal practical effect on the removal of organic chemical air pollutants and salinity of the sewage from the traditional membrane processing process. Most of the air pollutants and salinity finally enter the dregs of the MVR volatilization module, so the water body of the high pressure membrane penetrating liquid and the cooling liquid of the MVR volatilization module is very good, It can be recycled immediately or after simple depth 1 solution, and gradually realize zero sewage discharge.
