Boiler feed water pumps are important auxiliary equipment for steam generators (such as boilers or nuclear reactors) and are used to provide feed water equivalent to the steam emissions. They ensure a stable water level within the boiler, thereby maintaining the normal operation of the boiler. It is mainly used to deliver water to the boiler to meet the water supply demand during boiler operation. It is widely used in boiler water supply in industrial and mining enterprises and institutions and urban domestic water supply. It can also be used in pressure vessel water supply, hot water circulation, high-rise building water supply, farmland irrigation, fire boosting, hydraulic flushing, and food, brewing, medicine, and chemical industries. , aquaculture, environmental protection and other industries.
Types and structures
Among them, DG type is the more common one. DG type boiler feed water pump is a horizontal single-suction multi-stage segmented centrifugal pump. Its inlet and outlet are vertically upward. The suction section, middle section and discharge section of the pump are connected by tightening bolts. The pump rotor consists of an impeller, a balance plate and other parts mounted on the shaft. The entire rotor is supported by sliding bearings at both ends of the pump shaft. The bearings are lubricated with lubricating oil and cooled by circulating cold water. The shaft seal adopts packing seal or mechanical seal.
It can transport clean water or liquids with physical and chemical properties similar to clean water. It is suitable for high, medium and low pressure boiler feed water. The temperature of the conveying medium is ≤170℃, and the allowable pressure of the inlet is ≤0.6Mpa.
Working principle
Principle of pressure difference
The boiler feed water pump creates a certain negative pressure in the boiler system by pumping water, so that water can be pumped into the boiler system from the water storage tank or water supply pipe.
Principle of power transmission
Boiler feed water pumps are usually driven by motors. The power of the motor is converted into mechanical power of the boiler feed water pump through power transmission devices (such as belts, couplings, etc.), which promotes the movement of pump blades or pistons and other components to realize the movement of water. delivery.
Principle of water absorption and drainage
The boiler feed water pump needs to overcome the resistance in the pipe or water storage tank when working. Through the suction and drainage pressure of the pump, water is sucked into the pump from the water source and transported to the boiler through the outlet pipe.
Application areas
Industrial boiler feed water
In various industrial scenarios, such as chemical plants, steel plants, paper mills, etc., boiler feed pumps provide necessary water supply to industrial boilers to ensure stable operation of the boilers.
urban central heating
In urban centralized heating systems, boiler feed water pumps are used to transport hot water from the heat source to various heating stations to achieve centralized heating in the city.
Hot water circulation and pressurization
In a hot water circulation system or a hot water supply system that requires pressurization, the boiler provides power to the water pump to ensure effective circulation and supply of hot water.
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Sales manager:Cristine Guan
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