Research on the Combustion of Low Grade Pulverised Coal

Abstract

Burning characteristics of an extremely high ash coal, of which the calorific value is about 2000 kcal/kg, was tested by pulverized fuel combustion with a dry system. A special test furnace was designed which would be most adequate for the combustion of such a high ash coal. From the test, results obtained are as follows : 1) High combustion rate can be expected even from shales of 65∼75% ash, with high combustion efficiency. 2) To get stable combustion of low grade coal in a dry system, the furnace wall temperature must be kept in an adequate range, 750∼1100°C.