沼气工程两种辅助增温方式的经济效益分析  

Economic Benefit Analysis on Two Auxiliary Heating Methods for Heating of Biogas Plant

作　　者：李金平[1,2,3] 曹岗林 冯琛 杨霭蓉[1,2,3] LI Jin-ping CAO Gang-lin FENG Chen YANG Ai-rong(Western China Energy ＆ Environment Research Center, Lanzhou University of Technology, Lanzhou 730050, China Gansu Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou 730050, China China Northwestern Collaborative Innovation Center of Low-carbon Urbanization Technologies, Lanzhou 730050, China)

机构地区：[1]兰州理工大学西部能源与环境研究中心,兰州730050 [2]甘肃省生物质能与太阳能互补功能系统重点实验室,兰州730050 [3]西北低碳城镇支撑技术协同创新中心,兰州730050

出　　处：《中国沼气》2017年第5期50-56,共7页China Biogas

基　　金：国家"863"计划课题(2014AA052801);甘肃省国际科技合作专项(1604WKCA009);甘肃省自然科学基金项目(1508RJYA097)

摘　　要：为解决西北地区寒冷季节利用发电机余热增温沼气工程时热量不足的问题,笔者以兰州市花庄镇沼气工程为研究对象,对沼气工程各部分热量需求进行理论计算,同时对太阳能和沼气锅炉两种辅助增温方式进行了经济性研究,结果表明:夏季和其它季节发酵塔温度分别维持在52℃和37℃时,太阳能集热器和沼气锅炉两种辅助增温方式的初始投资比为3.75∶1,太阳能集热器比沼气锅炉辅助增温方式净现值高43.9%。考虑到国家相关政策、经济效益、环境效益和西北地区日照充足等因素,当发电机余热不足时,沼气工程辅助增温方式应优先选用太阳能集热器。The waste heat from power generation is often not enough for heating of biogas plant in cold season of Northwest region. In this paper,taking the biogas plant in Huazhuang of Lanzhou as example,the theoretical heat demand of each part of biogas system were calculated,and the economic efficiency of two kinds of auxiliary heating（Solar heat and biogas boiler） were analyzed. The result showed that,when the system kept the temperature at 52℃ in summer,and 37℃ in other seasons,the initial investment ratio of two auxiliary heating was 3. 75∶ 1. The net present value of solar auxiliary heating was 43. 9% higher. Considering the relevant national policy,economic benefits,environmental benefits and the northwest sunny condition,etc,solar heat collectors was preferred to choose as auxiliary heating mode for biogas project

关 键 词：发电余热 增温保温 沼气工程 太阳能集热器 

分 类 号：S216.4[农业科学—农业机械化工程] TK6[农业科学—农业工程]