1. According to different types of vehicles cleaned, it can be roughly divided into two categories:

(1) Wash the waste water of small vehicles. Because such vehicles run more short distances, the vehicles are contaminated with more dust and mud and sand, and relatively few oil substances, so this kind of waste water pollutants are relatively single, mainly mud and sand substances, detergent substances consumed when cleaning cars and a small amount of oil.

(2) Cleaning transportation of large vehicles of the car wash wastewater. Most of these vehicles run long distances, and the vehicles are contaminated with more coal tar or fuel oil, and the objects they carry will pollute the vehicle body. Such waste water pollutants are more complex, requiring a treatment unit to remove oil.

(3) The waste water of the Road Washing Truck

2. Classification according to different functions of car washing line

According to the different functions of the car wash line, it can be divided into simple car wash wastewater and wash wastewater of the car wash line with the function of car repair. The former car wash wastewater water quality mud sand, detergent substances more, relatively few oil substances, and the latter due to the use of lubricating substances in car repair, so that the oil content of the water is greatly increased, at the same time the concentration of other pollutants in the water is also significantly increased.

3. Classify according to different cleaning methods

According to the different cleaning methods, it is divided into machine washing waste water and artificial washing waste water

Road Washing Truck filtration treatment device, is composed of garbage box, backwash box and water tank, which is characterized by a garbage box with a coarse filter outlet, the outlet is provided with a coarse filter tank, sewage through the outlet with a coarse filter into the coarse filter tank, pressure pump inlet is provided with two fine filter, pressure pump water pipe connected with three membrane filter, The filtered water of the three-stage membrane filter is transported to the backwash tank through the pipeline, and the backwash tank is connected to the cleaning tank through the pipe, and the sewage containing impurities after concentration is transported back to the garbage tank through the pipeline.

Garbage box is provided with a primary coarse filter screen, sewage through the primary coarse filter screen filter, into the coarse filter tank, two fine filter through the pipeline with a pressure pump connected to the three-stage membrane filter, the three-stage membrane filter after the filter water through the pipeline to the backwash box, containing impurities before the filter water through the pipeline to transport back to the garbage box, So when the sewage liquid level collected in the garbage box reaches a certain level, the utility model begins to work, the water filtered by the first coarse filter into the second fine filter chamber for further filtration, the filtration accuracy of the second level is much higher than that of the first coarse filter, at the same time, the second fine filter is provided with a backwash water pipe, to prevent the filter net clog, The water filtered by the two-stage fine filter is pressurized by the booster pump into the three-stage membrane filter. After filtration by the three-stage membrane filter, the water enters the clean water pipeline and continues to spray the rinse cycle again. The impurities filtered by the three-stage membrane filter are taken out of the three-stage membrane filter by the re-entering water flow and returned to the dustbin, which is not easy to cause filtering blockage. The use of pressure pump, can improve the flow rate of sewage into the filter, one is to improve efficiency, two is to achieve the erosion of impurities on the membrane filter; The three-stage membrane filter adopts cross-flow membrane filtration, and the filtered waste will not gather on the surface of the filter layer, which can always maintain good filtration efficiency