青稞秸秆水热炭作为燃料的潜力研究

Study on the Potential of Hydrothermal Charcoal from Barley Straw as Fuel

为探究青稞秸秆水热炭作为燃料的潜力,选取拉萨市达孜县的青稞秸秆为研究对象,通过预处理、水热炭化的青稞秸秆,应用单因素试验法和正交试验法设置具有代表性的试验组,对青稞秸秆水热炭和青稞秸秆进行工业分析和元素分析,重点放在热值的分析。结果表明:青稞秸秆水热炭热值与水热温度和水热时间均呈正相关,与固液比呈负相关;制备秸秆水热炭的最佳条件为水热温度260℃、水热时间8 h、固液比1:10;反应条件对于秸秆水热炭的热值影响顺序为:水热温度>水热时间>固液比。青稞秸秆水热炭热值最高达到27.98 MJ·kg^(-1),接近水煤的热值(17~28 MJ·kg^(-1)),有作为燃料的潜力。综上,本研究通过控制水热条件,提高了青稞秸秆水热炭的热值,提高其作为燃料的潜力,同时将青稞秸秆作为燃料,有效利用了农业废弃物,实现了“变废为宝”。

In order to explore the potential of barley straw hydrothermal charcoal as a fuel,barley straw in Dazi county,Lhasa city,was selected as the research object,and the representative test groups were set up through pretreatment and hydrothermal charcoalization of barley straw by applying the one-way experimental method and orthogonal experimental method to carry out industrial and elemental analyses of barley straw hydrothermal charcoal and barley straw with a focus on the calorific value analysis.The results showed that the calorific value of barley straw hydrothermal carbon was positively correlated with the hydrothermal temperature and hydrothermal time,and negatively correlated with the solid-liquid ratio.The optimal conditions for the preparation of straw hydrothermal carbon were hydrothermal temperature of 260℃,hydrothermal time of 8 h,and a solid-liquid ratio of 1∶10.The order of the reaction conditions for the calorific value of straw hydrothermal carbon was as follows:hydrothermal temperature>hydrothermal time>solid-liquid ratio.The calorific value of barley straw hydrothermal carbon reached 27.98 MJ·kg^(-1),which was closed to the calorific value of water coal(17-28 MJ·kg^(-1)),and had the potential to be used as a fuel.In conclusion,the study through the control of hydrothermal conditions,to improve the calorific value of barley straw hydrothermal carbon,to improve its potential as a fuel,and at the same time,the barley straw as a fuel for the effective use of agricultural waste,to achieve the"waste into treasure".