As environmental quality standards rise, converting coal-fired furnaces to gas-fired ones has become one of the directions for controlling combustion pollution. In recent years, our company has undertaken a large number of coal-to-gas hot air furnace projects, accumulating mature experience in furnace retrofitting. We can provide reasonable coal-to-gas hot air furnace solutions according to customer needs and offer one-stop services for production, installation, and follow-up.

Direct-fuel gas hot air furnace

Primarily composed of valve components, burners, combustion chambers, secondary air distribution, and control systems.

Through the valve component, the burner nozzle is fully mixed with air for combustion, and a clean, high-temperature flame is directly sprayed into the combustion chamber for complete combustion, producing a clean, high-temperature flue gas at approximately 1000°C. This flue gas is then re-aerated to adjust the temperature to the required heat air for production. The heated air is then channeled through a heat air duct into the drying equipment (such as a drying room, oven, drum dryer, belt dryer, fluidized bed dryer, etc.) to dry the material.

Hot air cleaning, high thermal efficiency, up to. Few auxiliary equipment, low investment cost, good operating environment; easy to operate, manual/automatic control available; features automatic ignition, load adjustment, flame detection, and alarm function.

2. Indirect heat exchange gas hot air furnace

Primarily composed of the combustion system, heat exchange system, control system, and exhaust system.

Through the combustion of the burner, high-temperature flue gas is produced to heat the heat exchanger system. The heated air is then sent into the drying system by a blower. The thermal efficiency can reach 92%. When the temperature of the hot air within the drying system reaches the rated upper limit, the burner will automatically stop combustion or switch to a low flame. When the temperature of the hot air drops to the rated lower limit, the burner will reignite and resume operation or switch to a high flame. The rate of temperature increase can also be adjusted by regulating the air intake valve.

High heat exchange temperature, high thermal efficiency, compact size, stable hot air temperature, long service life, low maintenance cost.