Boiler Feed Pump Repair and Maintenance Guide

Boiler feed pumps are an important part of the steam cycle. As a complex device for conveying high-temperature, high-pressure liquids, their performance directly affects the power generation capacity of the power plant. In order to ensure the normal operation of the boiler feed pump and extend its service life, regular maintenance and care are necessary. This article will introduce you to the maintenance technical guide for boiler feed pumps, helping you better understand the maintenance methods and precautions of boiler feed pumps.

 

 

• Equipment operation characteristics and maintenance necessity

 

As the "heart equipment" of the boiler system, the boiler feed pump undertakes the core function of delivering high-temperature and high-pressure feed water to the boiler. Its typical working parameters include:

Working temperature: 105~210℃ (depending on the type of boiler)

Outlet pressure: 1.25~18.5MPa

Flow range: 5~500m³/h

 

Under long-term high-temperature, high-pressure and high-speed operating conditions, key components such as mechanical seals, bearings, and impellers are prone to wear. Statistics show that standardized maintenance can extend the life of equipment by more than 40% and reduce energy consumption by 15-20%.

 

• Maintenance and care

 

1. Regular inspection

Regular inspection of boiler feed pumps is the basis of maintenance, which can detect problems in time and deal with them. The contents of regular inspection include:

Operation status: Check whether the feed pump is running normally and whether the noise is abnormal.

Parameter inspection: Check the pump's inlet pressure, outlet pressure, flow, current, voltage, speed and other parameters to ensure that it operates within the normal range.

 

2. Cleaning

Long-term operation will cause dirt to accumulate inside the feed pump, affecting the pump's operating efficiency and life. Therefore, it is necessary to regularly clean the pump body and impeller, and clean the pump's inlet and outlet to ensure the smooth flow of the pump. In addition, the suction valve, drain valve and other accessories of the boiler feed pump should also be cleaned regularly.

 

3. Lubrication

The bearings of the feed pump will wear out during long-term operation, so proper lubrication is required to reduce wear and friction and extend the service life of the pump. When lubricating, it is necessary to select appropriate lubricating oil and lubricate according to the prescribed lubrication cycle. At the same time, regularly check the lubrication of the bearings, motors and other components of the boiler feed pump, and add lubricating oil in time.

 

4. Seal

Seals are important components to ensure the normal operation of the feed pump. If the seal is damaged or leaking, the pump efficiency will decrease or it will not operate normally. Therefore, it is necessary to check the condition of the seal regularly, and replace it in time if any problem is found.

 

5. Electrical system inspection

Regularly check the electrical system of the boiler feed pump to ensure the normal operation of the electrical equipment, and repair it in time if there is any fault.

 

6. Vibration and noise detection

Regularly perform vibration and noise detection on the boiler feed pump to determine whether balance adjustment or replacement of accessories is required.

 

• Maintenance precautions

1. Safety first: During maintenance, be sure to follow the safety operating procedures. Before maintenance, make sure that the power supply has been cut off and take other necessary safety measures.

2. Follow the operating procedures: During maintenance, the correct operating procedures should be followed. Do not remove or install parts at will to avoid damaging the pump body or causing other unnecessary losses.

3. Use appropriate tools: During maintenance, use appropriate tools to avoid using inappropriate tools that may cause damage to parts or poor maintenance results.

 

In addition to the above maintenance methods, a corresponding maintenance plan should be formulated, including regular replacement of wearing parts and regular cleaning of equipment. It should be noted that when performing maintenance, the boiler system should be powered off and cooled to avoid accidental damage.

It is recommended to ask professionals to conduct comprehensive inspections and maintenance regularly every year to ensure the safe and efficient operation of the boiler feed pump.

In short, the maintenance of the boiler feed pump is an important part of ensuring the normal operation of the boiler system, and regular inspections and maintenance are required to extend the life of the equipment and improve the efficiency of the equipment.