PURPOSE: To gasify a carbon raw material at a high gasification ratio by feeding the raw material and an oxidizing agent to a gasifying furnace at a specific temperature, branching the oxidizing agent from the same controlling means to the first burner group and the second burner and refeeding the scattered unburned material.
CONSTITUTION: A fine particulate solid raw material and an oxidizing agent such as oxygen or air are fed into a gasifying chamber 65 kept above the melting temperature of ash produced from the fine particulate raw material. Combustible materials in the raw material are converted into a gas and the ash is converted into slag. In the process, burners having different amounts of the distributed oxidizing agent are provided in plural stages and a large amount of the oxidizing agent is distributed into coal burners 62 as the first burner group. A char burner 104 as the second burner arranged on the same plane as that of the first burner group is installed to collect the unburned materials in the gas produced in the gasifying chamber 65 in the cyclone 70, passed from a char feed hopper 90 through a feeder 100 and, together with the oxidizing agent, fed to the char burner 103. The oxidizing agent is fed to each coal burner 62 and the char burner 104 with a control valve 111 to gasify the raw material and fed unburned materials at a high gasifying ratio.
SHOJI KAZUNORI
KIDA EIJI
KOYAMA SHUNTARO
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