Скачать или смотреть Use An Acetylene Cannon To Remove Ash And Coke From The Boiler

A Little Wisdom Helps You Become Smarter !

Using an acetylene cannon to remove ash and coke from the boiler (operating online without shutting down the boiler) is a kind of gas pulse shock wave ash cleaning technology. It removes the accumulated ash and coking on the heating surface of the boiler through the shock wave generated by the controlled explosion. The following is a detailed description of this process :

I. Process Principle

Acetylene Mixing and Ignition
Mix acetylene (C₂H₂) with air or oxygen in a certain proportion, and then ignite it in a specially designed combustion chamber (cannon body). This will generate an instantaneous deflagration, forming a high-intensity shock wave and high-speed airflow.
Function of the Shock Wave
The shock wave is directed into the boiler interior through the nozzle and acts on the areas with accumulated ash or coking. By utilizing its kinetic energy and vibration effect, the ash and coke are peeled off and then carried away by the flue gas.

 

II. Operation Process

Equipment Installation
Install the acetylene cannon device on the side wall of the boiler or at the ash cleaning port. Usually, multiple groups of cannon bodies are configured to cover different areas.

Gas Mixing and Injection
Precisely adjust the mixing ratio of acetylene and the combustion-supporting gas through the control system and inject them into the combustion chamber.

Pulse Ignition
Trigger the deflagration using an electric spark or a high-frequency igniter to generate a shock wave with a controllable intensity (the pressure is usually 0.3 to 0.8 MPa).

Cyclic Operation
Carry out cyclic operations according to the preset frequency (for example, once every 10 to 30 minutes) to ensure comprehensive ash cleaning.

 

III. Technical Advantages

Efficient Online Ash Cleaning
There is no need to shut down the boiler, which continuously ensures the operation efficiency of the boiler and avoids production interruptions.

Strong Adaptability
It is suitable for scenarios where coking is likely to occur, such as pulverized coal boilers and biomass boilers, and it has a particularly significant effect on viscous ash and coke.
Energy Conservation and Environmental Protection Compared with the traditional steam soot blowing method, it has lower energy consumption and reduces water consumption and heat loss.

 

IV. Precautions and Risks

Safety Control
Acetylene is a flammable and explosive gas. It is necessary to strictly prevent leakage and be equipped with a flame detection and emergency shutdown system.

Structural Tolerance
The pressure of the shock wave needs to be designed according to the material of the boiler to avoid damage to the furnace wall or tube bundle.

Operation Specifications
Personnel need to receive professional training and follow the ignition interval and sequence to prevent continuous deflagration from causing resonance.

 

V. Comparison with Other Technologies

Steam Soot Blowing : It relies on high-temperature steam, has high energy consumption, and is likely to cause wear on the pipe wall.

Acoustic Wave Ash Cleaning : It is suitable for loose accumulated ash, but has limited effect on hard coking.

Gas Pulse (Acetylene Cannon) : It has a high impact intensity and is suitable for stubborn accumulated ash, but the explosion parameters need to be precisely controlled.

 

VI. Applicable Scenarios

Coal-fired/Biomass Boilers : Parts prone to ash accumulation such as the furnace, superheater, and economizer.

Severe Coking Working Conditions : Boilers with a low ash melting point of the fuel or large load fluctuations.

 

Conclusion

Ash cleaning with an acetylene cannon is an efficient and economical online maintenance technology. However, its safety depends on strict operation specifications and the reliability of the equipment. In practical applications, it is necessary to evaluate according to the working conditions of the boiler and cooperate with other ash cleaning methods (such as acoustic wave assistance) to achieve the best results.