永旺彩票The selection and classification of water pumps in sewage treatment and drainage projects. Due to the wide range of uses and varieties of water pumps, the classification methods are also different. According to its principle of action, it can be divided into the following three categories:

(1) Vane water pump: pumps liquid through the high-speed rotating surface of an impeller equipped with vanes. There are centrifugal pumps, axial flow pumps, mixed flow pumps and so on.

(2) Positive displacement water pump: pumping liquid by changing the volume of the working chamber of the pump body. There are piston reciprocating pumps, plunger reciprocating pumps, rotor pumps and so on.

永旺彩票(3) Other types of pumps: refer to special pumps other than vane pumps and positive displacement pumps. There are screw pumps, jet pumps and so on.

Selection and classification of water pumps in sewage treatment and drainage engineering From the perspective of drainage engineering, urban sewage and rainwater pumping stations are characterized by large-scale flow and low lift. The head is generally between 2-12m, and the flow can exceed 1000 m3/h. In this working range, centrifugal pumps and axial flow pumps are generally applicable. Secondly, in some places, when choosing different types of pumps to transport water or chemicals (coagulants, disinfectants, etc.). ) According to the specific situation, they can always play a good role and effect.