For sewage screw pumps, single screw pumps are mostly used. Because of the complex composition of sewage and variable acid and alkali, special attention should be paid to the selection when using screw pumps. Now I will share the selection steps of Shenghui Pumps in sewage screw pumps.
1. First determine the specific working conditions of the sewage in the sewage treatment system, such as the pipeline laying condition, the inlet elbow and the outlet elbow valve condition.
2. Determine the displacement, lift and horizontal pipeline length required for sewage treatment, and determine the pump type preliminarily.
3. Determine the water content of the sewage, whether there are particles, fibers, overall acidity or alkalinity, and the material of the screw pump is determined according to the physical and chemical properties of the sewage.
4. Finally select the motor power and the number of revolutions. The higher the water content, the higher the number of revolutions. A suitable reducer is equipped. If there is almost no debris in the sewage, the motor can also be directly connected.
Sewage screw pump selection parameters:
1. Displacement: The displacement unit is m³/h or L/min, which is the volume of fluid sucked or discharged per time unit or per cycle. Displacement is an important parameter for the selection of sewage screw pumps.
2. Pressure difference: The pressure difference between two points in the system. The pressure difference of the sewage screw pump is the difference between the outlet pressure and the inlet pressure.
3. Number of revolutions: The number of revolutions per minute of the sewage screw pump. The sewage screw pump is equipped with a reducer. Its number of revolutions is the number of revolutions after the reducer is decelerated. The number of revolutions is about 300 revolutions. The number of revolutions depends on the difference. Working condition.
