煤热解过程中氯析出模型的建立
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摘要: 运用Boltzmann函数对实验数据进行拟合，建立了煤在热解过程中氯析出的模型。模型值与实验值的相对误差较小，模型较好地反映了实验结果的规律性。文中还提出了以t10、t50、和t90来表示氯析出10w%、50w%和90w%时对应的热解温度，以△t80表示热解时氯析出主要的温度区间。在此基础上的实验结果分析表明，氯析出率在10w%～90w%之间煤的对应的热解温度区间不同。在热解温度为900 ℃时，煤中氯析出率可达90w%以上。Abstract: Chlorine is one of trace elements in coal, which do harm to environment badly. It is of significance for the removal and control of chlorine in coal that the isolation characteristic of chlorine in coal was studied. In this paper, test data were fitted by using Boltzmann function, and model of chlorine removal was built on the process of coal pyrolysis. Relative error between model data and test data was low t10, t50, and t90 were put forward to compare to the temperature at which chlorine removal was 10w%, 50w% and 90w% respectivelyΔt80 was used to describe the primary temperature range of chlorine removal during pyrolysis. On the basis of these, the experimental data showed that the pyrolysis temperature of coal was different when the chlorine removal changed from 10% to 90%. Chlorine removal from coal was above 90w% at the pyrolysis temperature of 900 ℃.
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Key words:
- chlorine removal /
- coal pyrolysis /
- model /
- trace element
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