Combustion tests with pulverized coal

The results of 36 combustion tests made on a 468-h.p. boiler fired with pulverized coal at a power station of the Milwaukee Electric Railway and Light Company, Milwaukee, Wisconsin, are given in Bulletin 223, just issued by the Department of the Interior, through the Bureau of Mines. The tests were made by the fuel section of the Bureau of Mines in cooperation with the research department of the Combustion Engineering Corporation. Illinois coal was used as fuel. The object of the tests was to obtain authoritative results of the performance of pulverized coal under various conditions of furnace operation and with coal of different fineness and moisture content. The results of the tests show that in this plant an over-all boiler efficiency of 80 to 83 per cent was obtained.