污泥与生物质颗粒共烧的污染物产生、能量回收及环境影响

JADLOVEC Marek, VÝTISK Jan, HONUS Stanislav, POSPIŠILÍK Václav, BASSEL Nesser
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引用次数: 0

摘要

本研究描述了污水污泥与生物质颗粒共烧的污染物产生、能量回收和环境影响。本研究的主要目的是描述共焚烧产生的能源的使用情况,并评估排放污染物对环境的影响。共焚烧有五种不同的混合方式。燃烧发生在流化床反应器中,平均燃烧温度为915-939℃。燃烧过程由傅里叶变换红外光谱、连续汞监测系统、热电偶、压力和流量传感器绘制。结果表明:土壤中有害物质SO2和NOX的浓度分别为12.39 ~ 1730.33 mg∙m-3N和93.30 ~ 1156 mg∙m-3N。这意味着,在最坏的情况下,二氧化硫的排放限值超过40倍,氮氧化物的排放限值超过8倍。在热回收方面,烟气势能回收结果值为5.35 ~ 7.69 MJ∙kg-1,随着燃料中污泥含量的增加,热回收值减小。使用使用GaBi软件的生命周期评估方法也分析了污染物浓度的结果值。结果表明,污泥焚烧对气候变化、陆地生态毒性和人体毒性的影响最大。再者,随着燃料中污水污泥含量的降低,排放的烟气的危险性也随之降低。本研究提出了一种相对有前途的选择,即在一定条件下将污水污泥作为大型燃烧源的二次燃料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pollutants production, energy recovery and environmental impact of sewage sludge co-incineration with biomass pellets
This study describes the production of pollutants, energy recovery and environmental impact of the co-incineration of sewage sludge and biomass pellets. The main objective of this study is to describe the use of energy generated by co-incineration and to assess the environmental impact of emitted pollutants. Co-incineration takes place in five different blended. The combustion takes place in a fluidised bed reactor with an average combustion temperature of 915–939 °C. The combustion process is mapped by Fourier transform infrared spectroscopy, Continuous Mercury Monitoring Systems, thermocouples, pressures, and flows sensors. The results show that the concentrations of harmful substances, namely SO2 and NOX, reach values of 12.39–1730.33 mg∙m–3N for SO2 and 93.30–1156 mg∙m–3N for NOX. This means that the emission limits are exceeded 40 times for SO2 and 8 times for NOX in the worst case. Regarding heat recovery, the resulting value of potential energy recovery from the flue gas is 5.35–7.69 MJ∙kg–1, and as the sewage sludge content in the fuel increases, the heat recovery value decreases. The resulting values of pollutant concentrations are also analyzed using a life cycle assessment approach using the GaBi software. The results show that sewage sludge incineration has the greatest impact on climate change, terrestrial ecotoxicity, and human toxicity. Again, as the sewage sludge content in the fuel decreases, the hazardousness of the discharged flue gas decreases. This study presents a relatively promising option to use sewage sludge as a secondary fuel in large combustion sources under certain conditions.
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