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Classification of drainage pumping stations and principle of pump selection

2019-12-18
Classification of drainage pumping stations
Pumping stations that raise sewage (waste) water and sludge are collectively called drainage pumping stations. Pumping stations are usually classified as follows.
(1) According to the nature of water. Pumping stations can be divided into sewage (domestic sewage, production sewage) pumping stations, rainwater pumping stations, combined pumping stations, sludge pumping stations, etc.
(2) According to its role in the drainage system, pumping stations can be divided into halfway (area) pumping stations and final (total lifting) pumping stations.
(3) According to the way of pumping water before the pump starts, the pumping station can be divided into self-priming pumping station and non-self-priming pumping station.
(4) According to the plane shape of the pump room, the drainage pumping station can be divided into circular, rectangular and combined pumping stations.
(5) According to the combination of the pool and the pump, the pumping station can be divided into a joint-built pumping station and a sub-pumping station.
(6) According to the relative position of the pump and the ground, the pumping station can be divided into underground pumping stations and pumping stations and semi-underground pumping stations.
(7) According to the operation mode of the pump, the drainage pumping station can be divided into manual operation pumping station, automatic control pumping station and remote control pumping station.


 
First, the main basis for selecting the pump
The main basis for selecting a pump is the required flow rate, head, and the change of flow and head during operation. Due to the variety of pump station forms, the calculation of the flow and head of the pump set in the pump station is also different. The calculation methods for the flow and head of various pumping stations will be introduced in detail in the following design calculations.
Regardless of the type of pumping station, the selected pump should meet the flow and head requirements of the service object, and the pump should work in the district under various operating conditions.

Second, the principle of pump selection
The principle of pump selection: under the conditions of unfavorable working conditions, consider various working conditions, save investment and reduce energy consumption as much as possible. Technically, the flow Q and head H are reasonably calculated, and the number and type of pumps are selected to meet the user's requirements for water volume and water pressure. The number of pumps and working methods are determined from the economic and management perspective, so that investment and maintenance costs are low and energy consumption during normal work is low.
Prefabricated pumping stations are immediately effective in the field of sewage treatment. With the rapid increase in population, the problem of sewage treatment also becomes more urgent.
Prefabricated pumping stations will be a trend in the country sewage treatment.