稻壳快速热解制取生物质油的试验研究

目前生物质快速热解高温热解气主要利用间壁式冷却器进行冷凝,容易造成冷却管道的结焦堵塞问题,本试验根据流化床稀相输送特点、生物质的热解特性以及生物质油的冷凝收集特点,设计了生物质快速热解反应装置,改进生物质物快速冷凝系统,以稻壳为原料进行快速热解制取生物质油的试验研究,分别考察单因素反应温度、流化气量以及进料速度对生物质油产率的影响。试验表明:稻壳热解气能够快速顺利地得到冷凝,反应系统能够连续顺利运行,随着反应温度、流化气量、进料速度的增大,生物质油的产率都呈现先增大后减小的趋势。另外对产出的生物质油用气质联用设备进行了成分分析,得出了生物质油的主要成分,其中酸类、酮类、脂类以及酚类的含量相对较高。

Experimental study on the fast pyrolysis of the rice husk for bio-oil production

Currently, the condensation of bio-oil mainly is using the partition wall type cooler, which however can cause the coking of bio-oil and block the gas pipeline. According to the characteristics of dilute phase transport in fluidized bed, biomass pyrolysis and bio-oil condensate, a fast pyrolysis reactor with an improved bio-oil condenser was designed to pyrolyze the rice husk to prepare bio-oil. Experiments were conducted to study the factors affecting the yield of bio-oil such as reaction temperature, fluidizing gas flow and feeding rate. The result showed that the whole reaction device could run normally for a long time, and the bio-oil could condense rapidly, but the yield of bio-oil was increasing and then decreasing with the increase of reaction temperature, fluidizing gas flow and feeding rate. In addition, the bio-oil was collected and analyzed by GC-MS, and the contents of acids, ketones, esters and phenols were found relatively high in the bio-oil.