Resarch on Development of Combustion of Coal by Gasification

Abstract

he performance test results of the gasproducer made on the basis of these values and with a continuous coal charger, and using small lump and fine coal of 5, 000-6, 500kcal/kg heating value, show that these calculated values almost agree with the experimental values, and that the rate of and the efficiency (including the effect of tar) of the gasification are 400kg/m2hr and 90%, respectively. This producer is characterized by the equipment of clinker crashing-and-discharging and the method of gasifying agents supplying, that is, the gasifying agents are supplied with high velocity from surrounding wall tangentially.The costs for 5, 000kW private power generation by the both cases which are the gasification combustion and one of the typical cases in this country using pulverized coal combustion, are estimated and their economical merits are compared with each other. It is shown that if the efficincy of combustion by gasification is 78% or more, and if the costs of 1t steam and it coal are ¥ 600-800 and ¥ 4, 500 or less, respectively, the former is more economical than the later. One of the estimation show that allowance of price of generation in both cases ¥ 0.424 per kWhr when the efficiency of the gasification is 73. 3% and the producer has a reserve of power for this value.