【作者】 王丽丽； 王忠江； 卢化伟；

【Author】 Wang Lili~1,Wang Zhongjiang~(1※),Lu Huawei~2 (1.School of Engineering,Northeast Agricultural University,Haerbin 150030,China; 2.Harbin liangda Industry Co.,Ltd,Haerbin 150090,China)

【机构】 东北农业大学工程学院； 哈尔滨良大实业有限公司；

【摘要】 该文应用系统动力学和有限元热平衡分析方法,针对黑龙江省某大型沼气发电工程,研究其能量供需平衡情况,并确定工程实际运行过程中的一些关键参数。研究结果表明:罐体散热损失、水分蒸发热损失、沼气排出带走的显热损失、管路热损失占发酵系统总热损失的比例分别为85.59%～90.22%、2.05%～8.42%、3.93%～4.78%、2.06%～2.96%;通过对加热料液所需热量的分析确定了配料热水的加热温度,6、7、8月份为53℃,其它月份为65℃,其占沼气工程总需热量的73.13%～87.91%;通过对管路热损失的分析确定了不同外界气温条件下维持发酵罐35℃恒温发酵的日均加热时间;通过整个系统能量供需平衡的分析得出该工程发电回收的余热能够维持系统全年连续运转,为北方高寒地区大型沼气工程的应用及推广奠定了理论基础。更多还原

【Abstract】 Aiming at a large-scale biogas generating system in Heilongjiang Province,the energy balance of demand and supply was studied by the methods of system dynamics and finite element analysis of thermal balance,and some key parameters in course of operation were determined.The results showed that the heat loss proportion of the transfer heat of the digester,the evaporation of water,the extracted biogas and the pipelines were 85.59%-90.22%、2.05%-8.42%、3.93%-4.78%、2.06%-2.96%,respectively.The temperatures of mixing hot water were 53℃from June to August and 65℃at other months by the heat requirement calculation of heating fermentative materials.The heat requirement of heating fermentative materials made up 73.13%-87.91%of the total heat requirement.The mean heating time of maintaining 35℃of digester was determined by the heat loss analysis of pipelines.It was determined by the energy balance analysis of demand and supply of the total fermentative system that the system could realize yearly continuous running using the recovery surplus heat of biogas generation.The research laid the theoretic foundation for the application and expansion of large-scale biogas project in northern high-cold region.更多还原