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Effect of conditioner Fe_2O_3 on N-containing gaseous products distribution during sewage sludge thermal decomposition

机译：调节剂Fe_2O_3在污水污泥热分解过程中含N含N含气相分布的影响

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摘要

Thermal disposal of sewage sludge is likely to cause serious nitrogen related environmental problem, since it contains considerable amount of nitrogen. Considering that iron oxide (Fe_2O_3) is widely applied chemical condition for sewage sludge treatment, this study was focus on investigating the role of Fe_2O_3 in N-containing gaseous products distribution during sewage sludge thermal decomposition in a tube/fixed-bed furnace at 900°C with or without oxygen, respectively. According to the result, conditioner Fe_2O_3 had little influence on N-containing component transformation when using raw sludge sample, while NO rose roughly with the increasing amount of Fe_2O_3 as de-mineralized sludge was used. Oxygen content promoted the formation of nitrogen oxidative products while inhibited the reductive ones. In practical application, adjusting oxygen content can make N-containing components to convert into reductive products, which reduced the NO_x emission ultimately.
机译：污水污泥的热处理可能导致严重的氮气相关环境问题，因为它含有大量的氮。考虑到氧化铁（Fe_2O_3）广泛应用污水污泥处理的化学条件，本研究专注于研究在900°的管/固定床炉中的污水污泥热分解期间对含N含N的气态产物分布的Fe_2O_3的作用C分别有或没有氧气。根据结果​​，调节剂Fe_2O_3在使用原料污泥样品时对含N组分转化几乎没有影响，而使用脱矿化污泥的Fe_2O_3的升高量大致不会升高。氧气含量促进氮氧化产品的形成，同时抑制还原剂。在实际应用中，调节氧含量可以使含N的组分转换成还原产品，这最终降低了NO_X发射。

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