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热风炉辅助加热沼气系统研究

2015-08-13张彦范振山

湖北农业科学 2015年12期

张彦 范振山

摘要:设计了热风炉辅助加热沼气系统,该系统采用太阳能温室与热风炉辅助加热。运行试验结果表明,该系统池容平均产气率达到0.77 m3/(m3·d),沼气热值是25.38 MJ/m3,发酵液SS去除率为88.75%,BOD去除率为82.19%,COD去除率为82.46%,既促进了农村大量秸秆等废弃物的资源化利用,又解决了北方地区冬春季沼气池发酵温度低、产气率低等问题,成本低、效益高。

关键词:热风炉;辅助加热;沼气;温室

中图分类号:S216.4 文献标识码:A 文章编号:0439-8114(2015)12-3018-03

DOI:10.14088/j.cnki.issn0439-8114.2015.12.057

Study of Auxiliary Heating Biogas System of Hot Blast Stove

ZHANG Yana,FAN Zhen-shanb

(a.Department of Mechanical Engineering;b.Department of Automotive Engineering, Zhengzhou Technical College, Zhengzhou 450121, China)

Abstract: The auxiliary heating biogas system of hot blast stove was designed. This system used solar greenhouse and auxiliary heating of hot blast stove. The operating test results showed that the yearly average tank volume aerogenesis rate of the system was 0.77 m3/(m3·d), thermal value of biogas produced from it was 25.38 MJ/m3, dislodging rate of SS was 88.75%, dislodging rate of BOD reached 82.19%,and dislodging rate of COD reached 82.46%. Not only promote the utilization of rural straw and other waste, but also to solve the low fermentation temperature and low aerogenesis rate of methane tank of northern region in winter and spring. It is low in cost and high in benefit.

Key words: hot blast stove; auxiliary heating; biogas; greenhouse

中国农村经济快速发展,能源消耗逐渐增多,沼气能源的开发利用有利于解决农村能源供应紧张问题,促进可持续发展,受到国家重视[1]。温度对于发酵非常重要,在8~60 ℃温度范围内都能发酵产沼气[2],温度越高,微生物活动越旺盛,产气量越大。温度的突变会影响微生物的生命活动,使产气量下降[3]。从发酵的周期来看,温度越低,原料的发酵周期越长;温度越高,发酵周期越短[4]。在较为寒冷的冬春季,我国北方地区温度过低,会严重影响沼气池的产气率、产气量[5-7]。采用辅助加热可以为沼气发酵提供热量,有利于厌氧消化,同时,我国北方地区农村存在大量秸秆等生物质资源闲置情况[9]。本研究设计了热风炉辅助加热沼气发酵系统,该系统采用太阳能温室与热风炉辅助加热,解决了北方地区冬春季沼气池发酵温度低、产气率低等问题。热风炉利用生物质燃料,促进了农村大量秸秆等废弃物的资源化利用,成本低、效益高,改善了农村生态环境,形成新的经济增长点,促进了农民增收与农牧业的可持续发展。……

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