Conceptual Design For An Atmospheric Fluidized Bed Direct Combustion Power Generating Plant

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Download or read book Technical Notes for the Conceptual Design for an Atmospheric Fluidized-bed Direct Combustion Power Generating Plant. [Comparison of AFB Plant and Pulverized Coal Plant]. written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of this report presents a comparison of the conceptual designs of a large (570 MW(e)) pulverized coal (PC) steam generator equipped with a wet limestone flue gas desulfurization (FGD) system and two equivalent sized atmospheric fluidized bed (AFB) steam generators including balance of plants for electric-power generation. The reader is cautioned that this portion of the report compares a zero generation AFB technology to pulverized coal technology which has been operationally and economically optimized for the past half-century. This comparison is intended to be indicative of whether further development of the AFB concept as a viable alternative to the PC/FGD concept for electric-power generation is merited. In the second part, the load-following capability of a once-through subcritical atmospheric fluidized bed boiler is analyzed. Digital computer simulation predictions of the plant's response to open loop step changes in firing rate, feedwater flow, governor valve, unit load demand, etc, are made. The predicted response of throttle pressure, steam temperature, unit load, etc, are compared to the response of a conventional coal-fired, once-through, subcritical unit. The load-following capability is assessed through this qualitative comparison. Additional model response predictions are also presented for which no test data are presently available.