畜禽粪污沼气发电工程中的加热能量平衡分析

发布时间：2017-12-26 20:45

本文关键词：畜禽粪污沼气发电工程中的加热能量平衡分析　出处：《中国沼气》2016年06期 　论文类型：期刊论文

【摘要】：文章以江苏某畜禽粪污沼气发电项目为例,分析了畜禽粪污沼气发电工程的中温厌氧消化系统加热能量供给及其影响因素。结果表明:该项目中,总加热能量需求为213.39 GJ·d~(-1),主要为厌氧消化罐的增温保温(75%)和有机肥烘干(25%),其中厌氧消化罐增温保温的热量需求主要是物料增温(85.41%~86.45%)、罐体散热(12.63%~12.9%)和输热管散热(0.68%~1.78%)。因此,当发电余热回收效率为47.4%,回收热量为254.54 GJ·d~(-1)时,沼气发电余热能够满足整个工程的加热能量需求。在其它条件不变的情况,对影响沼气工程加热能量平衡的各主要因素进行单因子分析,结果表明,要保证发电余热至少满足中温厌氧消化增温保温能量需求,则进料TS含量不应低于6.17%,余热回收效率不应低于29.74%,沼气产量达产比例不应低于设计产量的62.74%,原料量不应低于设计原料的18.63%,保温系统保温性能不应低于设计的27.36%。
[Abstract]:Taking a livestock and poultry waste biogas power generation project in Jiangsu as an example, the heating energy supply and its influencing factors of mesophilic anaerobic digestion system of livestock manure and biogas power generation project were analyzed. The results showed that: the project, the total heating energy demand is 213.39 GJ - d~ (-1), mainly for the temperature anaerobic digestion tank insulation (75%) and organic fertilizer drying (25%), the anaerobic digestion tank temperature heat insulation material demand is mainly warming, cooling tank (85.41%~86.45%) (12.63%~12.9%) transport and heat pipe cooling (0.68%~1.78%). Therefore, when the efficiency of waste heat recovery is 47.4% and the recovery heat is 254.54 GJ. D~ (-1), the waste heat of biogas power generation can meet the heating energy demand of the whole project. In the case of other conditions unchanged, the single factor analysis results show that the main factors which influence the biogas heating energy balance, to ensure the heat generation at least meet mesophilic anaerobic digestion temperature thermal energy demand, then it should not be less than 6.17% TS content of material, heat recovery efficiency should not be less than 29.74%, the biogas production capacity the proportion should not be less than the design yield 62.74%, the amount of raw material should not be less than 18.63% of the raw materials design, insulation system, insulation performance should not be less than 27.36% of the design.
【作者单位】：农业部沼气科学研究所;
【基金】：国家自然科学基金(31500105) 现代农业产业技术体系建设专项资金(CARS-36)
【分类号】：TM619;X713;S216.4
【正文快照】： 我国是农业大国,畜禽粪便资源丰富,据不完全统计,2012年我国畜禽粪便排放量达32.1亿吨[1]。沼气发酵技术是目前最具前景的畜禽粪便资源化利用技术之一[2],其利用有机废弃物产沼气,即可以有效削减有机污染,又可高效产沼气,而沼气的主要成分—甲烷,是一种重要的能源物质[3]。目

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