發(fā)布時間：2018-12-17 02:19

【摘要】：冬季沼液內(nèi)的發(fā)酵菌在低溫下活性受到抑制,沼氣池基本不產(chǎn)氣。本文通過對沼液采取加熱的方式,提升發(fā)酵菌活性,以提高冬季產(chǎn)氣量,滿足冬季建筑采暖需求。構(gòu)建了加熱沼氣池實驗系統(tǒng)。在對村鎮(zhèn)住宅用沼氣池廣泛調(diào)研基礎(chǔ)上,進行了冬季加熱沼氣池系統(tǒng)設(shè)計。確定了實驗用沼氣池大小,結(jié)構(gòu),計算了沼氣池的負荷、加熱換熱器的長度、形狀、類型及沼液料液濃度等;提出了沼氣池施工組織方案,確定了主要施工材料及其施工工藝。進行了加熱沼氣池實驗研究,分析總結(jié)了實驗結(jié)果。精心設(shè)計了實驗方案。設(shè)計了測量裝置,確定了測量參數(shù)與位置。對沼氣池內(nèi)部溫度、室外空氣溫度等對沼氣產(chǎn)量的影響進行了實驗研究。對不加熱和兩種不同加熱溫度情況下的實驗數(shù)據(jù)進行了分析。對實驗臺的運行進行了設(shè)計和運行策略的優(yōu)化。實驗結(jié)果表明:當料液加熱溫度在32℃和37℃的情況下,系統(tǒng)的能效比分別為3.1和3.3。同時,在中溫發(fā)酵范圍內(nèi),隨著沼液溫度的升高,甲烷含量相應(yīng)增加,沼氣熱值也會升高。探討了加熱沼氣池的經(jīng)濟性和技術(shù)上的可行性。以村鎮(zhèn)建筑為模型,從技術(shù)性、經(jīng)濟性和節(jié)能性對村鎮(zhèn)利用加熱沼氣采暖進行了分析。同時探討了利用沼氣采暖和燃煤爐采暖的初投資、運行費用、回收期及其節(jié)能效果的可行性。上述研究結(jié)果表明:當分別采用電熱水器和太陽能對沼氣池進行加熱時,一次能源的利用系數(shù)均大于1;沼氣采暖與燃煤、電采暖相比,其投資回收期在5年左右。在具備建設(shè)條件情況下,采用沼氣采暖是解決村鎮(zhèn)供暖問題的途徑之一。
[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，

本文編號：2383479