冬季加热沼气池系统的实验研究
发布时间：2018-12-17 02:19
【摘要】：冬季沼液内的发酵菌在低温下活性受到抑制,沼气池基本不产气。本文通过对沼液采取加热的方式,提升发酵菌活性,以提高冬季产气量,满足冬季建筑采暖需求。构建了加热沼气池实验系统。在对村镇住宅用沼气池广泛调研基础上,进行了冬季加热沼气池系统设计。确定了实验用沼气池大小,结构,计算了沼气池的负荷、加热换热器的长度、形状、类型及沼液料液浓度等;提出了沼气池施工组织方案,确定了主要施工材料及其施工工艺。进行了加热沼气池实验研究,分析总结了实验结果。精心设计了实验方案。设计了测量装置,确定了测量参数与位置。对沼气池内部温度、室外空气温度等对沼气产量的影响进行了实验研究。对不加热和两种不同加热温度情况下的实验数据进行了分析。对实验台的运行进行了设计和运行策略的优化。实验结果表明:当料液加热温度在32℃和37℃的情况下,系统的能效比分别为3.1和3.3。同时,在中温发酵范围内,随着沼液温度的升高,甲烷含量相应增加,沼气热值也会升高。探讨了加热沼气池的经济性和技术上的可行性。以村镇建筑为模型,从技术性、经济性和节能性对村镇利用加热沼气采暖进行了分析。同时探讨了利用沼气采暖和燃煤炉采暖的初投资、运行费用、回收期及其节能效果的可行性。上述研究结果表明:当分别采用电热水器和太阳能对沼气池进行加热时,一次能源的利用系数均大于1;沼气采暖与燃煤、电采暖相比,其投资回收期在5年左右。在具备建设条件情况下,采用沼气采暖是解决村镇供暖问题的途径之一。
[Abstract]:The activity of fermenting bacteria in biogas liquor in winter was inhibited at low temperature, and the biogas digester basically did not produce gas. In this paper, by heating the biogas liquid, the fermentative bacteria activity was improved to increase the gas production in winter and to meet the heating demand of winter buildings. The experimental system of heating biogas digester was constructed. On the basis of extensive investigation of biogas digesters used in villages and towns, the system design of heating biogas digesters in winter is carried out. The size and structure of biogas digester for experiment are determined, the load of biogas pool, the length, shape, type and concentration of biogas liquid of heat exchanger are calculated, and the construction organization scheme of biogas pool is put forward, and the main construction materials and construction technology are determined. The experimental results of heated biogas digesters were analyzed and summarized. The experimental scheme was carefully designed. The measuring device is designed and the measuring parameters and position are determined. The effects of internal temperature of biogas digester and outdoor air temperature on biogas production were studied experimentally. The experimental data of non-heating and two different heating temperatures are analyzed. The operation of the test bench is designed and the operation strategy is optimized. The experimental results show that the energy efficiency ratio of the system is 3.1 and 3.3 respectively when the heating temperature is 32 鈩，
本文编号：2383479
[Abstract]:The activity of fermenting bacteria in biogas liquor in winter was inhibited at low temperature, and the biogas digester basically did not produce gas. In this paper, by heating the biogas liquid, the fermentative bacteria activity was improved to increase the gas production in winter and to meet the heating demand of winter buildings. The experimental system of heating biogas digester was constructed. On the basis of extensive investigation of biogas digesters used in villages and towns, the system design of heating biogas digesters in winter is carried out. The size and structure of biogas digester for experiment are determined, the load of biogas pool, the length, shape, type and concentration of biogas liquid of heat exchanger are calculated, and the construction organization scheme of biogas pool is put forward, and the main construction materials and construction technology are determined. The experimental results of heated biogas digesters were analyzed and summarized. The experimental scheme was carefully designed. The measuring device is designed and the measuring parameters and position are determined. The effects of internal temperature of biogas digester and outdoor air temperature on biogas production were studied experimentally. The experimental data of non-heating and two different heating temperatures are analyzed. The operation of the test bench is designed and the operation strategy is optimized. The experimental results show that the energy efficiency ratio of the system is 3.1 and 3.3 respectively when the heating temperature is 32 鈩，
本文编号：2383479
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