垃圾衍生燃料等温快速热解和燃烧反应特性

Pyrolysis and combustion characteristics of RDF at isothermal condition

利用热天平和管式炉对RDF(RefuseDerivedFuel)等温快速热解和燃烧反应特性进行了研究。实验发现,在等温快速升温的条件下,RDF热解和燃烧的反应速率都非常快,从受热开始到反应结束需60s～80s;从开始失重到完成反应为20s。RDF热解和燃烧热重反应曲线非常类似,都只有一个反应失重区;RDF组成对其燃烧和热解反应性有重要影响,含有橡胶的RDF的热解和燃烧反应速率较小。在650℃～800℃RDF快速热解产物中气、液产物的产率可达80%～90%,而固体产物的产率只有10%～20%,热解气体的热值为20kJ/m3,RDF较适合进行热解处理。

Fast pyrolysis and combustion properties of RDF (Refuse derived fuel) in thermobalance and tubular furnace at isothermal condition were investigated. Both pyrolysis and combustion of RDF have very fast reaction velocities. It takes 60?s～80?s to finish reaction from the time being heated, and about 20?s to complete reaction from weight loss occurred. The combustion profile of RDF is very similar to pyrolysis profile, only one weight loss region is found for both. The volatile matter of RDF firstly gives off and then burns, and the subsequent char is burnt simultaneously. The results show that the composition of RDF has effect on its pyrolysis and combustion reactivity. The RDF containing tyre has lower pyrolysis and combustion reaction velocities. There are 80%～90% of gas and liquid and 10%～20% of solid among pyrolysis product of RDF during fast pyrolysis at isothermal condition from 650?℃ to 800?℃. The pyrolysis gas has higher heating value of about 20?kJ/m^3 and RDF is suitable for pyrolysis.