Summary of Boiler Tube Rust Removal Processes

In industrial production, the normal operation of boiler tube is crucial to the entire production process. However, the generation of rust will affect the performance of boiler tubes, so an effective iron removal process is essential. What are the iron removal processes for boiler tubes?

Physical method

1. Water flushing method

The water flushing method is to impact the inner wall of the pipe with water at high speed to wash away rust and silt. It is suitable for boiler tubes that are thick, curved, and have more side holes. This method is simple to operate, but it consumes a lot of water.

2. Friction method

The friction method is to use a machine to insert the brush head into the boiler tube for mechanical air removal, which can effectively remove rust and sediment. This method is usually used for rougher pipe systems, and the operation is more complicated, so safety precautions must be taken.

Chemical method

1. Pickling method

The pickling method is to inject acid into the boiler tube to react with the rust on the inner wall of the pipe and fall off, so as to achieve the purpose of cleaning the inner wall of the pipe at room temperature. Although the effect is obvious, it requires strict control of the concentration, time, temperature, etc. of the acid solution to avoid corrosion of the boiler tubes. Boiler tubes of different materials, such as carbon steel pipe and seamless steel pipe, have different tolerances to acid solution, and the acid solution formula and treatment parameters need to be adjusted according to the specific material.

2. Alkaline washing method

The alkaline washing method uses alkaline solution as the main cleaning agent, which can remove insoluble substances accumulated in the boiler tubes and also remove rust. The operation is simple, but the concentration and time requirements in the chemical method must be followed.

3. Oxidation-reduction method

The oxidation-reduction method uses chemical reactions to reduce rust to iron ions, and then removes it with a cleaning agent. This method is relatively safe. However, attention should be paid to the concentration of the reaction solution and the mastery of operating skills.

Mechanical method

1. High-pressure flushing method

The high-pressure flushing method uses high-pressure water flow to flush out the rust and sludge in the boiler tube to achieve the purpose of rust removal. This method is highly efficient, but requires professional operation. For some joints, such as boiler tubes connected by pipe flange, excessive pressure may affect the sealing of the joints.

2. Blasting method

The blasting method is a method that uses explosions to radially impact the inner wall of the tube to quickly remove rust and sediment. This method is effective, but the boiler tube needs to be repaired and evaluated after the blasting.

Summary

In summary, there are different methods for removing rust. You need to choose a method that suits you according to the actual situation. During the operation, you need to ensure safety and strictly follow relevant laws and regulations and operating specifications to avoid accidents.