Wellman-Galusha Process

Crushed coal is fed to the gasifier through a lock hopper and vertical feed pipes. The fuel valves are operated so as to maintain a relatively constant flow of coal to the gasifier to assist in maintaining the stability of the bed and, therefore, the quality of the product gas. The air or oxygen which is injected into the gasifier passes over the top of the water jacket and thereby picks up the steam required for the process. The air-steam mix is introduced into the ash bin section underneath the 

Water jacket Gasification zone Combustion zone Revolving grate 

The gas from the distillation zone contains almost all of the oil and tar and devolatilized methane as well as the residual water entering with the coal. 

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Wellman-Galusha A coal gasification process using a fixed bed the dry ash is removed through a revolving grate. 

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