| 摘要 |
A coal circulating fluidized bed coal gas generating furnace system comprises the following successively connected equipments: a coal gas generating furnace (2), a high temperature separator (3), a heat exchanger (5), a low temperature separator (4) and a waste heat boiler (6). There are a first air inlet (21), at least one secondary air inlet (22) for feeding high temperature gasification agent to the furnace (2) and a circulating coal inlet (23) for feeding circulating coal to the furnace (2). The first air inlet (21) and the secondary air inlet (22) are connected to the heat exchanger (5), and the circulating coal inlet (23) is connected to the high temperature separator (3), the heat exchanger (5) and the low temperature separator (4) respectively. With the designs of two air inlets, two coal feeding inlets, two separations of coal and circulations of coal powders, the temperature of the gasification agent conveyed to the furnace (2) can be raised to 750-850 °C, the consumption of the heat value for the gasification reaction between coal powders and the gasification agent can be decreased by 20% of that of prior art, consumption of coal can be decreased to 0.22Kg/Nm<SUP>3</SUP>. The system has a low consumption of coal, a high thermal value, a high productivity and a low cost. |
