AIR HEATING PLANT Russian patent published in 2009 - IPC F24H3/02 F24F7/00 

FIELD: heating.

SUBSTANCE: invention is intended for air heating and may be used in systems heating different objects. The air-heating plant contains combustion chamber made up with brick-lining, auxiliary boiler equipment and air heater connected to hot and cold air mixing chamber by means of hot water pipeline. The above chamber is situated in front of the mine fan. The furnace wall pipes are placed in brick lining and/or in front of it and from the side of combustion chamber. The furnace walls cool combustion chamber and protect brick-lining from high-temperature effects from furnace environment, from overheating and damage. The furnace walls are cooled by coolant circulation circuit with heaters situated in the heated air flow. Anti-freezing agent is used as coolant. The heaters may be installed before air heaters for air pre-heating and accordingly, for air heater protection from low-temperature corrosion.

EFFECT: improvement of plant operation reliability and efficiency.

3 cl, 1 dwg