Strategies of Energy management in a Cassava Starch Plant for increasing energy and economic efficiency
Strategies of Energy management in a Cassava Starch Plant for increasing energy and economic efficiency
复制标题
木薯淀粉厂提高能源和经济效益的能源管理策略
DOI：
10.1016/j.jclepro.2019.06.309
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发表时间：
2019
影响因子：
11.1
通讯作者：
Shuangfei Wang
中科院分区：
文献类型：
--
作者：
Yongjun Yin;Zhichao Ma;Guangzai Nong;Shuangfei Wang
能源成本占淀粉加工厂支出的第二大部分。因此，为了提高能源效率，考虑在木薯淀粉厂安装热电联产系统。因此，他们的能量转换和效率进行了研究。其中，对沼气池的结构进行了建模，重点分析了沼气、动力、热量和沼气分配率等因素，并在理论分析的基础上建立了公式，解决了这些因素之间的关系。Results.show生产1 t淀粉所需的最低沼气量为134.8m3，采用热电联产-锅炉系统生产淀粉可产生电能704.7e875.6MJ，总热量1311.0MJ。在三种策略下，蒸汽完全可以满足供热需求，而在策略3下，则可以获得少量的剩余电力。三种策略下的热电联产-锅炉系统的总能效分别为70.6%、70.1%和67.1%，比原系统的能效58.7%提高了8.4%和11.9%。200 t/d木薯淀粉厂采用热电联产-锅炉系统，总减排量为2017.1e2508.3t/a，总投资2724万CNY，回收期3.18年。
Energy cost contributes to the second largest portion of the starch-processing plants’ expenditure..Therefore, to improve energy efficiencies, CHP systems installed in cassava starch plants are considered..Hence, their energy conversions and efficiencies are investigated. Where, the structure of the plant is.modeled, the factors of biogas, power, heat and the biogas distribution ratio are focused; the relation-.ships among those factors are resolved by establishing formulas based on theoretical analysis. Results.show: the minimum demand of biogas for 1 t starch product is 134.8 m 3 , which can produce 704.7.e875.6 MJ of electric energy and total 1311.0 MJ of heat for starch production by a CHP-boiler system. The.steam produced there can fully satisfy the heat demand under the three strategies, while a minority of.excess electricity is available under the strategy 3. The total energy efficiencies of the CHP-boiler system.are 70.6%, 70.1% and 67.1% corresponding to the three strategies; those are 8.4%e11.9% more than the.efficiency of 58.7% by the original system. The total reduction of CO 2 emissions is 2017.1e2508.3t/a for a.200 t/d cassava starch plant using CHP-boiler system; which investment costs 27.24 million CNY in total,.and will be pay back in 3.18 years.