As environmental quality standards rise, switching from coal to gas combustion has become a key direction for pollution control. In recent years, our company has undertaken numerous projects for converting coal-fired hot air furnaces to gas-powered ones, accumulating mature experience in furnace retrofitting. We can provide reasonable coal-to-gas hot air furnace solutions tailored to customer needs, along with all-inclusive services from manufacturing to 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 combustion nozzle is fully mixed with air for combustion, and a clean, high-temperature flame is directly喷射 into the combustion chamber for complete combustion, producing clean high-temperature flue gas at approximately 1000°C. After secondary air distribution, the flue gas is adjusted to the required temperature for production heat. The heated air then enters the drying equipment (such as drying rooms, ovens, drum dryers, belt dryers, and fluidized bed dryers) to dry the materials.

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

2. Indirect Heat Exchanger Gas Forced Air Heater

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 blown into the drying system by a blower. The thermal efficiency can reach 92%. When the temperature of the hot air inside the drying system reaches the rated upper limit, the burner will automatically stop combustion or switch to a low flame. When the hot air temperature drops to the rated lower limit, the burner will reignite and operate or switch to a high flame, and the rate of temperature increase can also be adjusted by regulating the air intake valve.

High heat exchange temperature, high thermal utilization, compact size, stable hot air temperature, long lifespan, and low maintenance costs.