With increasing demands for environmental quality, switching from coal to gas combustion has become a key direction for pollution control. 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 offer reasonable coal-to-gas hot air furnace solutions based on customer needs and provide all-inclusive services including manufacturing and installation.

Direct-fired 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 injected into the combustion chamber for complete combustion, producing a clean high-temperature flue gas at approximately 1000°C. This high-temperature flue gas is then balanced through secondary air distribution to achieve the required heat air temperature for production. The heat air is then channeled through heat air ducts into drying equipment (such as ovens, drying cabinets, drum dryers, belt dryers, and fluidized bed dryers) to dry the material.

Hot air cleaning, high thermal efficiency, low 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.

By burning through the burner, high-temperature flue gas is produced to heat the heat exchanger system. The heated air is then blown into the drying system by a blower. The thermal efficiency can reach 92%. When the hot air temperature in the drying system reaches the rated upper limit, the burner will automatically stop burning or switch to a low flame. When the hot air temperature 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 lifespan, and low maintenance cost.