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大型沼气工程沼液蒸发浓缩的能量平衡分析

作  者:
白晓凤;李子富;王琦;王苗苗
单  位:
中交天航环保工程有限公司博士后科研工作站;北京科技大学能源与环境工程学院
关键词:
沼液;沼气工程;蒸发;浓缩;能量平衡
摘  要:
大型沼气工程每年产生大量沼液,沼液的处理与处置已成为制约沼气行业发展的重要因素.文章研究了沼气发电余热的利用途径,以能否满足沼液蒸发所需热量为基础,将发电余热利用分为5种模式.以德青源大型沼气工程为例,分析了热电联产沼气工程的能量供求关系,结果发现该沼气工程的发电余热不仅可以满足厌氧发酵系统和沼液蒸发的热量需求,还有热量剩余,属于余热剩余型.最后文章论述了沼液蒸发浓缩具有的环境和经济效益.
作  者:
BAI Xiao-feng;LI Zi-fu;WANG qi;WANG Miao-miao;Station of postdoctoral scientific research in CCCC-TDC Environmental Engineering Co Ltd;School of Energy and Environmental Engineering,University of Science and Technology Beijing;
单  位:
BAI Xiao-feng%LI Zi-fu%WANG qi%WANG Miao-miao%Station of postdoctoral scientific research in CCCC-TDC Environmental Engineering Co Ltd%School of Energy and Environmental Engineering,University of Science and Technology Beijing
关键词:
biogas slurry;;biogas projects;;evaporation;;concentration;;energy balance
摘  要:
Large-scale biogas projects produce a lot of biogas slurry each year. The treatment and disposal of biogas slurry has become an important factor restricting the development of biogas industry. In this paper, the utilization ways of waste heat from biogas fueled power generation was discussed. Based on whether the heat required for biogas slurry evaporation can be satisfied, the utilization of waste heat was divided into five modes. Taking Deqingyuan biogas project as an example, the energy supply and demand relations of heat-power cogeneration biogas project was analyzed. Results showed that the waste heat generated from the biogas project can not only meet the heat demand of the anaerobic fermentation system and slurry evaporation, but also have heat surplus.Finally, the environmental and economic benefits of biogas slurry evaporation are discussed.

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