Energy-Saving Analysis for Startup Systems of Supercritical CFB Boiler

doi:10.11930/j.issn.1004-9649.2013.9.24.4

Abstract

Abstract: Nowadays large-scale supercritical circulating fluidized bed (CFB) boilers are still in the stage of development domestically and internationally. Therefore, it is very necessary to carry out quantitative calculation for the analysis of the starting system. Based on the technical characteristics of CFB boilers and taking the 600-MW supercritical CFB boiler for example, the cold start curve from ignition to loading by 30% of rated load is divided into four stages, and the heat loss of each stage is calculated respectively. In addition, economic comparison between flash box startup system and compound startup system is also conducted. The results show that although the investment and maintenance costs of flash box startup system are low, there exists big heat loss during startup as much as 42.19×10⁵ MJ for one cold startup of a 600-MW CFB boiler. With the cost of manufacturing and maintenance decreasing, the compound startup system is more economical, which is highly recommended for 600-MW supercritical CFB boilers.

Key words: CFB boiler, startup system, cold start, supercritical unit

CLC Number:

TK22

LI, Peng. Energy-Saving Analysis for Startup Systems of Supercritical CFB Boiler[J]. Electric Power, 2013, 46(9): 24-28.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.9.24.4

https://www.electricpower.com.cn/EN/Y2013/V46/I9/24

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