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首页> 外文期刊>Journal of Mechanical Science and Technology >System development and analysis for producing high quality gas and activated sludge char
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System development and analysis for producing high quality gas and activated sludge char

机译：生产高质量气体和活性污泥焦的系统开发和分析

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For energy and resource utilization of dried sewage sludge, an integrated system with in-line connection of pyrolysis gasifier, plasma reformer, and fixed bed adsorber was developed. The plasma reformer was set to improve producer gas yield by destructing tar released from the pyrolysis gasifier. The fixed bed adsorber filled with the sludge char produced from the pyrolysis gasifier was installed for adsorption of un-treated tar. The pyrolysis gasifier produced sludge char, tar and gas. The sludge char showed 98.1 m2/g of specific surface area and 63.49 Å of mean pore size, which had a good distribution of micropore and mesopore with superior adsorption rate of light PAH tar. The concentrations of gravimetric tar and total light tar were 26.3 g/Nm3 and 10.9 g/Nm3, respectively. The analyzed light tar was in the order of benzene, naphthalene, benzonitrile, benzeneacetonitrile, anthracene and pyrene. Produced gas was composed of hydrogen, carbon monoxide, methane, and carbon dioxide. The plasma reformer displayed 83.2% of removal efficiency with 4.4 g/Nm3 of gravimetric tar at the outlet due to tar cracking and steam reforming reaction. The total amount of light tar was 1.3 g/Nm3. Among the reforming gas, the concentration of hydrogen, carbon monoxide, and methane was increased. Gravimetric tar at the outlet of the adsorber was 0.5 g/Nm3, which was 88.6% of removal efficiency. The total amount of light tar was 0.39 g/Nm3. Gas analysis results at the exit showed 50.5% H2, 21.9% CO, 10.5% CH4, 7.7% CO2 and 0.1% C2H2 with a higher heating value of 13,482 kJ/Nm3. Therefore, sewage sludge can be converted into energy and resource by pyrolysis and gasification since the producer gas and sludge char could be utilized in a heat engine and adsorption tower for tar removal, respectively.
机译：为了对干污泥进行能源和资源利用，开发了一个将热解气化炉，等离子体重整器和固定床吸附器串联的集成系统。等离子体重整器设置为通过破坏从热解气化炉释放的焦油来提高生产气的产率。安装装有由热解气化炉产生的污泥焦炭的固定床吸附器，以吸附未处理的焦油。热解气化炉产生污泥炭，焦油和气体。污泥炭的比表面积为98.1 m 2 / g，平均孔径为63.49Å，微孔和中孔分布良好，轻质PAH焦油的吸附率高。重量焦油和总轻焦油的浓度分别为26.3 g / Nm 3 和10.9 g / Nm 3 。分析的轻质焦油的顺序为苯，萘，苄腈，苯乙腈，蒽和pyr。产生的气体由氢气，一氧化碳，甲烷和二氧化碳组成。由于焦油裂化和蒸汽重整反应，等离子重整器出口处的去除效率为83.2％，重量比重为4.4 g / Nm 3 。轻焦油的总量为1.3 g / Nm 3 。在重整气体中，氢，一氧化碳和甲烷的浓度增加。吸附器出口的重量焦油为0.5 g / Nm 3 ，占去除效率的88.6％。轻焦油的总量为0.39 g / Nm 3 。出口处的气体分析结果显示，H 2 为50.5％，CO 2 为10.5％，CH 4 为10.5％，CO 2 为7.7％，C为0.1％ 2 H 2 ，具有更高的发热量13,482 kJ / Nm 3 。因此，污水产生的污泥可通过热解和气化转化为能源和资源，因为产生的气体和污泥炭可分别用于热机和吸附塔中以去除焦油。

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