| 摘要 |
<p>The present invention relates to a circulating coal fluidized bed coal gas producer system, including a coal gas producer, a high temperature separator, a heat exchanger, a low temperature separator, and a waste heat boiler, which are connected successively, wherein the coal gas producer is provided with a first air inlet and at least one secondary air inlet for feeding high temperature gasification agent into the producer, and is provided with a circulating coal inlet for feeding circulating coal into the producer, the first air inlet and the secondary air inlet are connected to the heat exchanger, and the circulating coal inlet is connected to the high temperature separator, the low temperature separator and the heat exchanger respectively. In the present invention, with designs of entering air twice, feeding coal at two inlets, two separations and circulations of powder coal, the temperature of gasification agent when fed into the producer could reach 750°C-850°C. Reaction heat consumption between the powder coal and the gasification agent is 20% lower than that of prior art. The combustible ingredient in coal gas is 20% higher than that of prior art. The coal consumption decreases to about 0.22 Kg/Nm 3 . The system has advantages of low coal consumption, high heat value, high productivity, and low cost.</p> |
