PIT FURNACE FOR BULK MATERIAL BAKING Russian patent published in 2015 - IPC F27B1/00 

FIELD: oil and gas industry.

SUBSTANCE: pit furnace comprises cylindrical lined pit, loading and unloading devices, duct for furnace gases exhaust, gas pump connected by suction branch pipe with furnace gases duct and by discharge branch pipe with header of furnace saturation gas, fan for air supply to the furnace. Top part of the pit is connected with hollow shaft asymmetrically located above the loading device. On the hollow shaft a wind wheel and impeller are installed, and the wind wheel blades and impeller blades during synchronous movement create the tapering cone of rotation. The connecting elements, at least four, between the top part of the cylindrical lined pit and hollow shaft are uniformly located along its perimeter, and between the wind wheel and impeller output windows are made in the hollow shaft.

EFFECT: keeping of permanent set speed of movement of gas flows in internal volume of the pit under varying weather and climatic conditions.

1 dwg