The Utilisation of Low-Grade Fuels in Gas Producers

JSGT 1942 V26 T145-T154

Some preliminary suggestions for reducing the disadvantages of using low grade fuels are put forward. A study of the fundamentals of gasification has given a number of new possibilities, of which the most important is that by reducing the voids in the part of the bed first reached by the air it is possible to get good producer gas and low temperatures simultaneously. It is suggested that the addition of coke to caking fuels may enable them to be gasified at a rating more closely approaching the normal. The use of a feed cylinder is suggested to reduce carry-over of dust when gasifying dusty or friable fuels, while fuels of wide-size ratio are best gasified in producers designed to segregate the large particles away from the walls. Clinkering of fuels with low ash fusion temperature may be reduced by the addition of sand. Apart from these suggestions it is concluded that almost any fuel can be gasified with a corresponding reduction in throughput and increase in labour.

M. W. Thring, B.A