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Development of the Process Model and Optimal Drying Conditions of Biomass Power Plants
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-05 , DOI: 10.1021/acsomega.9b03557 Jaechan Han 1, 2 , Yeongryeol Choi 1, 2 , Junghwan Kim 2
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-05 , DOI: 10.1021/acsomega.9b03557 Jaechan Han 1, 2 , Yeongryeol Choi 1, 2 , Junghwan Kim 2
Affiliation
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An empty fruit bunch (EFB) is a byproduct of the palm oil production process with an undried moisture content of 60–70%, which is too high for use as direct combustion fuel. Drying processes are generally considered essential for the recent use of EFBs as power plant fuels because their high moisture content decreases the boiler efficiency. The lower moisture content of dried EFBs increases the heating value and boiler efficiency but creates a trade-off with the energy required for the drying process. This study developed an EFB-based 10 MW power plant model by integrating economic evaluations in order to obtain optimal drying conditions. A hot air dryer was used in the drying process. The EFB evaporation behavior was predicted by reflecting the drying kinetics of EFBs in Aspen Plus. The optimum drying conditions were found to be a steam recirculation ratio of 0.25 and drying time of 23 min, creating dried EFBs with a 9.91% moisture content, which reduced costs by 5.48% relative to the undried base scenario. In addition, the developed model was compared to the drying process of a real power plant currently under construction in Indonesia. This drying process reduces the EFB moisture content from 48 to 20%.
中文翻译：
生物质发电厂工艺模型及最佳干燥条件的开发
空果束（EFB）是棕榈油生产过程中的副产品，其未干燥的水分含量为60-70％，对于用作直接燃烧的燃料来说太高了。通常认为干燥过程对于近来将EFB用作发电厂燃料至关重要，因为干燥过程中水分含量高，会降低锅炉的效率。干燥的EFB的较低水分含量可提高热值和锅炉效率，但会在干燥过程所需的能量之间进行权衡。这项研究通过综合经济评估以获得最佳干燥条件，开发了基于EFB的10 MW电厂模型。在干燥过程中使用热空气干燥器。通过反映Aspen Plus中EFB的干燥动力学来预测EFB的蒸发行为。发现最佳的干燥条件是蒸汽再循环比为0.25，干燥时间为23分钟，产生的干燥的EFB的水分含量为9.91％，相对于未干燥的基本方案，其成本降低了5.48％。此外，将开发的模型与印尼目前正在建设的真实发电厂的干燥过程进行了比较。该干燥过程将EFB的水分含量从48％降低到20％。
更新日期：2020-02-18
中文翻译：
生物质发电厂工艺模型及最佳干燥条件的开发
空果束（EFB）是棕榈油生产过程中的副产品，其未干燥的水分含量为60-70％，对于用作直接燃烧的燃料来说太高了。通常认为干燥过程对于近来将EFB用作发电厂燃料至关重要，因为干燥过程中水分含量高，会降低锅炉的效率。干燥的EFB的较低水分含量可提高热值和锅炉效率，但会在干燥过程所需的能量之间进行权衡。这项研究通过综合经济评估以获得最佳干燥条件，开发了基于EFB的10 MW电厂模型。在干燥过程中使用热空气干燥器。通过反映Aspen Plus中EFB的干燥动力学来预测EFB的蒸发行为。发现最佳的干燥条件是蒸汽再循环比为0.25，干燥时间为23分钟，产生的干燥的EFB的水分含量为9.91％，相对于未干燥的基本方案，其成本降低了5.48％。此外，将开发的模型与印尼目前正在建设的真实发电厂的干燥过程进行了比较。该干燥过程将EFB的水分含量从48％降低到20％。
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