Theoretical Analysis of the Operational Characteristics of the Single-stage Fluidized Bed Coal Gasification Test Plant

概要

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In the previous paper, a simulation model of the coal gasifier was developed and it was shown that the data obtained from 75 mmΦ single-stage pressurized fluidized-bed coal gasification test plant were explained sufficiently by this model.<BR>Over the wide ranges of the operational conditions, the performance of the gasifier are examined theoretically by using this model and following results are obtained.<BR>(1)When the steam ratio is increased keeping the char holdup constant, there exists the optimum operational condition in which both steam utilization and heating value of the produced gas reach maximum.<BR>(2)Though the performance of the gasifier might be improved satisfactorily if the char holdup could be increased, the gasification test plant have been already operated in the neighborhood of the optimum conditions.<BR>(3)With scaling up the gasifier, both char holdup and gas flow rate can be increased more without slugging, then char through-up per unit cross-sectional area of the gasifier can be improved fairly well.
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