摘要
在无氧气氛下用中试回转窑热解系统对废轮胎进行了热解试验,热解气用气相色谱仪进行分析,轮胎热解气体主要包含CO、CO2、CH4、C2H4、C2H6、C3H8、C4H8,以及它们派生的不饱和烃。热解温度的不同,回转窑微负压运行时,挥发分在窑内的停留时间不同,气体的成分有所变化。CH4在500℃达到最高,C2H4则在550℃产量最大,虽然温度的提高有利于大分子烃类二次裂解,但由于在窑内停留时间较短,产量反而在较高的热解温度650℃达到最大值,超过10%。计算表明,热解气可以作为轮胎热解的热源。
Scrape tires were pyrolysed under atmosphere of inertia in a pilot-scale rotary kiln. Pyrolysis experiment was carried out at 500℃,550℃,600℃ and 650℃. When the system was steady, pyrolysis gas was collected and analysed by gas chromatography. The experiment shows that tyre pyrolysis gases are composed CO,CO_2,CH_4,C_2H_4,C_2H_6,C_3H_8,C_4H_8, and its unsaturated derivatives. In the experiment temperature of this paper, the pyrolytic gases yield increased with increasing pyrolytic temperature. From the study we realized that volatile matter have different stayed time in the kiln and changed characters under different pyrolytic temperature when the kiln was run at a minus pressure. The yield of CH_4 has a maximum level at 500℃,while that of C_2H_4 are at 550℃. Though the higher temperature will contribute to the second degradation of high molecular hydrocarbon, having less time in the kiln, the high molecular hydrocarbon yield is higher than it at the other temperature, over 10%. At last, we calculate the gross calorific value of the pyrolytic gas. It shows that gas will provide enough energy to the degradation of tire.
出处
《能源工程》
2005年第2期30-34,共5页
Energy Engineering
关键词
废轮胎
热解气
回转窑
热值
scrape tyres
pyrolysis
rotary kiln
calorific value
