鉄鋼用高温炉の微粉炭燃焼に関する研究 : 第2報、COMおよび微粉炭の燃焼率

概要

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The Combustibility of a COM, a Pulverized coal and a heavy oil was studied for high temperature furnaces in the steel industry. Combustion efficiency was measured in a furnace with 1 m diameter and 4 m long tunnel, a thermal input of 40×10^4 kcal/hr, a furnace temperature of 1300℃ and a combustion air temperature of 150〜450℃. COM and pulverized coal combustion cause a rapid main reaction and a slow char reaction. The char reaction determines the burn-out point of the fuel. The efficiency of COM containing coal is as high as that of heavy oil. The efficiency of COM containing petroleum coke is lower, because coke combustion produces much char. The efficiency of coal is much lower than that of other fuels by 20〜50 percent in the main reaction, and ignition is delayed. The increase of the combustion air temperature and the velocity, the upper movement of the fuel injection position promote the main reaction and improve efficiency.
社団法人日本機械学会の論文
1984-04-24