Thermodynamic and economic analysis on a two-stage predrying lignite-fueled power plant
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Thermodynamic and economic analysis on a two-stage predrying lignite-fueled power plant
- 发表刊物：
- DRYING TECHNOLOGY
- 摘要：
- In this study, an improved configuration of lignite-fueled power plant integrated with a two-stage predrying system was proposed. The predrying system mainly consists of two fluidized-bed dryers and an additional feed water heater. Lignite is dried successively in the exhaust gas dryer and steam dryer. With boiler exhaust gas being the heat source of the first stage dryer, waste heat of a fraction of the boiler exhaust gas can be used. The exhaust gas of the second stage dryer was considered to be water vapor and its latent heat can be recovered by the additional feed water heater. The thermodynamic and economic analysis show that with the lignite drying degree being 0.1, 0.2, and 0.3 kg/kg, the power generation efficiency of the proposed power plant is 1.45, 2.12, and 2.81% higher than that of the conventional lignite power plant, respectively. Moreover, the annual net economic benefit will be 1.34, 2.03, and 1.60 M$/a during the lifetime of the drying system. The annual net economic benefit is not necessarily higher with higher power generation efficiency.
- 合写作者：
- Zhu, Xin ; Wang, Chang'an ; Wang, Limin ; Che, Defu
- 是否译文：
- 否
- 发表时间：
- 2019-01-02