Working Principle and Structural Foundation

The self-preheating burner, also known as a heat exchanger burner, integrates the burner and heat exchanger into a single unit. Inside the burner, air or gas is preheated. A counter-flow heat exchanger is placed around the burner, which preheats the combustion air required by the burner. The structure primarily uses several concentric tubes to separate the air and flue gas, with the middle tube serving as the heat exchange surface. The entire heat exchanger is made of heat-resistant steel.

Use advantages and limitations

Advantages

Significant energy savings: Compared to burners that do not recover flue gas heat, this design can reduce fuel consumption by 20% to 30%.

Easy installation: It is as easy to install as a standard burner and is only one-tenth the size of a flue gas heat exchanger.

Excellent heat transfer and temperature uniformity: The fuel product is ejected at a speed of 80m/s, which promotes good recirculation of the furnace gas, improving heat transfer and ensuring better temperature uniformity.

Limitations: The main drawback is the difficulty in adjusting the furnace gas flow path using the flue gas outlet.

Application scenarios

This self-heating burner is suitable for industrial furnaces operating within a temperature range of 600 to 1400°C, and performs even better in furnaces exceeding 1000°C. It has been applied in various industrial settings, including forging furnaces, ladle roasting equipment, heat treatment furnaces, and aluminum melting furnaces.

Use precautions

Safe operation

Ignition and extinguishing: Before ignition and after extinguishing, cleaning should be carried out to prevent the accumulation of residual fuel or harmful gas to cause danger.

Combustion observation: During combustion, the flame should be observed to find abnormalities such as flashback and fire off in time.

The opening sequence of the valve: the induced fan or combustion fan must be opened first, and then the fuel gas valve; when stopping, the fuel gas valve must be closed first, and then the induced fan or combustion fan must be closed. This is to prevent gas leakage, explosion and gas poisoning and other safety accidents.

Air-fuel ratio parameter control

Reasonable adjustment of air-fuel ratio parameters is very important for the normal operation of burner. Inappropriate air-fuel ratio may lead to problems such as incomplete combustion and unstable flame.

Maintenance points

Regularly check the burner components, such as whether the heat exchanger is blocked or damaged, whether the valve is closed tightly, and whether the air injector is working normally. Proper maintenance should be carried out for the auxiliary parts of the burner, and potential problems should be found and dealt with in time to ensure the stable and reliable operation of the burner.