The cleaning and spraying system is composed of stainless steel water pump, nozzle, nozzle and water tank. The pre-washing room is equipped with an upright stainless steel nozzle controlled by two separate lines of mechanical control. The front end of the nozzle is a ball-head nozzle. The oil tank is placed vertically, and the nozzle is sprayed with a certain Angle to facilitate the discharge of the dirt in the oil tank along the water flow.