Direct-fired hot-air furnace
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Product Introduction
A direct-fired hot-air furnace is a device that generates hot air by directly combusting fuel, offering high efficiency and energy savings, and is widely used in various industries. Our company’s design and manufacture of direct-fired furnaces have been granted national patents. The following provides detailed information:
Working Principle
- Fuel combustion: The fuel is combusted in a combustion device, generating high-temperature flue gases.
- Mixing and Heating: High-temperature combustion gases are mixed with ambient air to produce hot air at the desired temperature.
- Material contact: Hot air directly contacts the material to be dried, heating it and evaporating its moisture to achieve drying or baking.
Applicable Fuel
- Solid fuels: such as coal and coke.
- Liquid fuels: such as diesel, heavy oil, and alcohol-based fuels.
- Gaseous fuels: such as town gas, natural gas, and liquefied petroleum gas.
Product Features
- High efficiency and energy savings: high thermal efficiency results in fuel consumption that is approximately 50% lower than that of steam-fired or indirect-heating systems.
- Direct heating: Hot air comes into direct contact with the material, resulting in rapid heating.
- Compact design: no complex heat exchangers required.
- Temperature control: Precise temperature regulation can be achieved by adjusting the fuel supply and the air-fuel mixture ratio.
Application Fields
- Industrial drying: e.g., grains, food products, chemicals, construction materials, etc.
- Industrial heating: such as metal heat treatment and paint baking.
- Agricultural drying: e.g., seeds, feed, fertilizers, etc.
- Other fields: such as flue gas/wastewater treatment, SCR denitrification temperature rise heating, and others.
Precautions
- Fuel Selection: Choose the appropriate fuel based on actual needs and costs.
- Equipment Maintenance: Conduct regular inspections of combustion equipment and ventilation systems to ensure safe operation.
- Environmental protection requirements: Select equipment that meets environmental standards to reduce pollutant emissions.
- Applicable materials: Ensure that the materials can be directly exposed to hot air to prevent contamination or damage.
Special Note
Our equipment features a multi-layer, sleeve-type all-metal construction that contains no refractory materials and adopts a single-cantilever design, thereby eliminating cracking and spalling caused by thermal expansion and contraction due to differing coefficients of thermal expansion among materials—issues commonly encountered in conventional equipment. The high-temperature zone is constructed from high-temperature-resistant stainless steel (e.g., 310S), ensuring a long service life. Thermal efficiency is no less than 95%.
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CONTACT
No. 10, Industrial Street, Hengshui City, Hebei Province, China