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Pyrolysis and combustion of PVC,PVC-wood and PVC-coal mixtures in a two-stage fluidized bed process

机译:两阶段流化床工艺中PVC,PVC-木材和PVC-煤混合物的热解和燃烧

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Several tests using pure bottle-grade polyvinyl chlorine (PVC),with wood (pine) and with Polish coal have been performed in a two-stage combustion test facility which contains two reactors.The first reactor is a bubbling fluidized bed (BFB) where the fuel is pyrolysed in the temperature range 200-400 °C.The second reactor is a circulating fluidized bed (CFB) operated at a temperature of around 800 deg C.The pyrolysed gases from the BFB reactor or the circulating fluidized bed combustor (CFBC) are analysed with a Fourier transform infrared (FT-IR) spectrometer.The main part of this work concentrates on the first stage of decomposition of PVC in the first reactor,which mainly yields volatiles (mainly HC1) and solid residue.The results show that there is an interaction in PVC/wood pine mixtures,which affects the degradation of PVC.The same interaction also occurred with the PVC/Polish coal mixture.For the two-stage combustion test,the chemical analysis of char samples taken from the bed of the first reactor,when 100% PVC is used,shows that the chlorine content is below 0.1 wt.% at chlorine to carbon mass ratio < 0.001 kg Cl/kg C.
机译:在包含两个反应器的两阶段燃烧测试设施中,使用纯瓶级聚氯乙烯(PVC),木材(松木)和波兰煤进行了几次测试。第一个反应器是鼓泡流化床(BFB),其中燃料在200-400°C的温度范围内被热解。第二个反应器是在约800摄氏度的温度下运行的循环流化床(CFB)。来自BFB反应器或循环流化床燃烧器(CFBC)的热解气体用傅里叶变换红外(FT-IR)光谱仪进行分析。这项工作的主要内容是在第一个反应器中进行PVC分解的第一阶段,主要产生挥发物(主要是HCl)和固体残留物。结果表明PVC /木松混合物中存在相互作用,影响了PVC的降解。PVC/波兰煤混合物中也发生了相同的相互作用。对于两阶段燃烧试验,从床中取出的焦炭样品进行化学分析Ø在第一反应器中,当使用100%PVC时,表明氯与碳的质量比<0.001 kg Cl / kg C时氯含量低于0.1 wt。%。

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