The water supply pumping station is the water lifting facility in the water supply engineering system. Water pumps, pipelines and motors (referred to as pumps, pipes, and machines) constitute the main process facilities in the pumping station. The classification of water supply pumping station can be divided into: ground pumping station, underground pumping station, semi-underground pumping station; in water supply engineering classification (function) is divided into water intake pumping station, water pumping station, boosting pumping station, Circulating water pumping station. The classification and characteristics of water supply pumping stations are as follows:
Water intake pumping station (primary pumping station)
The raw water is transported from the water source (usually low head) to the treatment plant, and when the raw water does not need to be treated, it is directly sent to the water supply network, reservoir or water tower. The primary pumping station can be built together with the water intake structure or separately. The water delivery capacity of the pumping station is equal to the water supply capacity of the treatment plant plus the water consumption of the water plant, and the water supply is generally uniform throughout the day.
Water pumping station (secondary pumping station)
The water in the clean water tank of the treatment plant is transported (generally high-lift) to the water supply network to meet the needs of users. The water supply capacity of the secondary pumping station must meet the highest water requirements and also adapt to the situation when the water consumption decreases (see water consumption). In order to make the water pump run under high-efficiency conditions, multiple water pumps are generally set up, with different combinations of pumps, and water towers or pools set up to adapt to changes in water supply (see water regulation structures). Some use speed-regulating water pump units to adapt to changes in water supply and water pressure.
Booster pump station
A pumping station that raises the water pressure in the water supply network where the water pressure is insufficient. It can be used when expanding or building a new pipe network. Especially in cities with long and narrow terrain or large height differences or buildings with insufficient water pressure, it is generally more economical and reasonable to install booster pumping stations.
Circulating water pumping station
The wastewater discharged from the production process is processed and then sent back to the pumping station used in the production, such as the circulating pumping station of cooling water (see circulating cooling water system).
The water supply pump station is composed of three parts: pump room, power and power distribution equipment and auxiliary room, and its auxiliary structures include inlet pools and valve wells. The pump room is a place where water pump units, pipelines, valves, starting equipment and cranes are installed. Water pumps generally use centrifugal pumps, which are horizontal and vertical. According to the number of impellers, they are divided into single-stage and multi-stage centrifugal pumps. Multi-stage pumps are used in high-pressure water supply systems. Power equipment usually uses electric motors and sometimes internal combustion engines. Power distribution equipment includes high and low voltage power distribution and electrical equipment that controls the operation of the unit and various monitoring instruments. The water supply pumping station can be built into ground type, semi-underground type or underground type according to local conditions and needs. Some open-air pumping stations can also be built. The operation of the water supply pumping station has manual control, semi-automatic and fully automatic control, etc., most of which are semi-automatic pumping stations.
