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Boiler water pump


A crucial component of the feed water system ensures the power plant’s operating efficiency and safety.


The boiler water pump holds a significant position within the feed water system of a boiler. Its primary function is to facilitate the continuous and reliable delivery of water to both the economizer and the boiler. This action guarantees stable water input and actively enhances the overall stability of the boiler system.


The boiler water pump is a mechanical device used in steam power plants, boilers, and other industrial applications to deliver water from a water source (such as a condensate tank or deaerator) to a boiler’s economizer or steam drum. In essence, it converts the energy from a prime mover, such as an electric motor or a steam turbine, into hydraulic energy, which propels the water through the system.


In power plants, the selection of boiler water pumps depends on the plant’s specific requirements and operational characteristics. The main types of feed water pumps used in power plants include:

Centrifugal Pumps: These are the most common type of feed water pumps used in power plants. Centrifugal pumps work by using a rotating impeller to impart kinetic energy to the water, increasing its velocity and pressure. So they are efficient for handling significant flow rates and are often used in higher-capacity power plants.

Reciprocating PumpsReciprocating pumps are positive displacement pumps that use a piston or plunger to move water. These pumps are capable of delivering high-pressure water, making them suitable for plants that require high-pressure feed water.

Regenerative (Turbo) Pumps:  These pumps utilize the energy of high-velocity water to increase its pressure. They are particularly effective in power plants that require moderate pressure increases in the feed water.

Steam Turbine-Driven Pumps: Steam turbines are used to drive feed water pumps. These pumps are often used in large power plants and can provide significant operational flexibility.


Maintaining Temperature and Pressure: The steady water supply upholds the desired temperature and pressure levels within the boiler. Fluctuations in water input can imbalance temperatures and pressure, potentially affecting efficiency and safety.

Optimizing Heat Transfer: Consistent water flow enables the economizer to efficiently recover heat from flue gases, preheating feed water for the boiler. Interruptions in the water supply can hinder heat transfer, reducing overall efficiency.

Steam Generation Stability:  A consistent water supply ensures the boiler produces steady steam, which is crucial for industrial processes and power generation. Fluctuations in steam output can disrupt operations and impact downstream equipment.

Minimizing Stress on Components: Variable water input strains the boiler and its components, causing wear and tear. Maintaining a stable water supply extends the system’s lifespan.


In summary, the feed water pump plays a dual role by delivering water and exerting a critical influence on system efficiency, safety, and performance. The choice of pump type takes into account plant capacity, pressure requirements, available space, and engineering considerations.


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