桦甸页岩油泥与半焦混烧特性

摘要

Thermo-gravimetric analyzer was performed to study influence on combustibility index during blended combustion of Huadian oil shale sludge and 500℃ semi-coke, according to the ignition temperature and combustion characteristics to study the gas releasing rule by FTIR, to analysis mixing ratio and heating rate on combustion characteristics and the FWO method was applied to study shale and semi-coke sludge co-combustion dynamics.The results show the co-combustion process is divided into three stages: including light components combustion, heavy components and volatiles co-combustion and fixed carbon burn-out.With the rise of heating rate and incorporation ratio, promoting the indices of comprehensive combustion and stable combustion, indicating sludge and heating rates are beneficial to combustion properties of mixed samples.The results also show the releasing rate of gaseous products grows with the proportion of shale oil sludge increasing, in which gaseous products in co-combustion of sludge and semi-coke are the major components.A(CO2)/A(CO) showing an increasing trend increases and then decreases after the first, and the proportion of sludge is not a linear relationship, indicating that the incorporation of sludge samples in favor of burn-out, but not necessarily conducive to full combustion of the sample.Except sample S1, those samples activated energy has a similar rule.The activated energy of light oil is at 50-100 kJ/mol in burning region, 100-150 kJ/mol in co-combustion stage and the activated energy reaches 300 kJ/mol in combustion of fixed carbon.%利用热重分析仪对桦甸页岩油泥与其500℃半焦混合燃烧时着火温度和燃烧特性进行考察,通过FTIR研究样品的混烧特性及气体释放规律,分析混合比和升温速率对混烧特性的影响并通过FWO法对样品混烧的动力学特性进行了研究.结果表明,样品的燃烧分为3个阶段:油泥轻质组分燃烧阶段、油泥重质组分与半焦挥发分共燃阶段及固定碳燃烧阶段.油泥比例的增大及升温速率的提高导致综合燃烧特性指数和稳燃指数逐渐增大,说明油泥和升温速率有利于混合样品的燃烧特性.油泥比例的增大促进气体释放速率逐渐加大,A(CO2)/A(CO)呈现出先减小后增大然后再增大的趋势,与油泥比例不成线性关系,说明油泥掺入有利于样品的燃烧,但并不一定有利于样品的燃尽.除样品S1外,其他样品活化能变化规律相似.轻质油燃烧阶段活化能在50-100 kJ/mol,共燃阶段活化能在100-150 kJ/mol,固定碳燃烧阶段活化能达到了300 kJ/mol左右.