The JRF Series Coal-Fired Hot Air Furnace provides generation of process hot air using a coal-fired heat source. Typical materials and duties include drying systems requiring the hot-air duty.

This furnace is a general-purpose hot air device, used in conjunction with various material drying equipment. It is widely used for heating and dehumidification of agricultural products such as grain, seeds, feed, fruits, dehydrated vegetables, shiitake mushrooms, wood ear mushrooms, white fungus, tea leaves, and tobacco leaves, as well as food, pharmaceuticals, chemical raw materials, and light and heavy industrial products. It can also be used for heating various facilities and dehumidifying warehouses.

High-temperature resistant measures have been adopted, thereby greatly extending its service life compared to tube-type hot air furnaces. It also adopts a flue gas longitudinal flushing of heat dissipation fins and a negative pressure smoke exhaust method. The heat exchange area does not accumulate dust and requires no cleaning, resulting in stable thermal performance. Various types of coal or firewood can be used as fuel, and it is equipped with a secondary air inlet device for complete combustion. The various technical and economic indicators of this furnace have reached the leading domestic level.