Due to stricter regulations, large biomass/waste incineration power plants are expected to reduce (i) pollutant emissions through water (such as organic compounds dissolved in the discharge water), (ii) the withdrawal of external freshwater, and (iii) the disturbance to the natural water by increasing the water recycle and internal reuse. To address such challenges, flue gas quench (FGQ) is playing a vital role that links flue gas (FG) cleaning and wastewater treatment. In this study, a detailed analysis based on the material and energy balance is performed regarding the pollutant distribution in the flue gas and the wastewater within a combined heat and power (CHP) plant. The real data from the reference CHP plant were used; and results show that the utilization of FGQ can result in less wastewater discharge (about 73 tonnes/d) together with less pollutant concentration to the municipal wastewater treatment plant, as compared to the system with only flue gas condenser but without FGQ. The integration of FGQ also results in less burden on the external freshwater use by increasing the amount of clean water for internal use (about 57 tonnes per day). In addition, the integration of FGQ can offer a potential annual energy saving of about 13.1 MWh in the municipal wastewater treatment plant due to the less wastewater coming from the CHP plant.

中文翻译：

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在生物质/废物供热的热电联产厂中集成烟道气淬灭技术的潜在环境效益

由于法规更加严格，大型生物质/垃圾焚烧发电厂有望减少（i）通过水排放的污染物（例如溶解在排放水中的有机化合物），（ii）抽取外部淡水以及（iii）干扰通过增加水的循环利用和内部再利用，将其转化为天然水。为了应对这些挑战，烟气淬火（FGQ）在将烟气（FG）清洁与废水处理联系在一起的过程中发挥着至关重要的作用。在这项研究中，基于材料和能量平衡的详细分析针对烟气和废水在热电联产工厂中的污染物分布进行了分析。使用了来自参考CHP工厂的真实数据。结果表明，与仅使用烟气冷凝器但不使用FGQ的系统相比，使用FGQ可以减少废水排放量（约73吨/天），同时减少市政污水处理厂的污染物浓度。FGQ的整合还通过增加内部使用的净水量（每天约57吨）减轻了外部淡水使用的负担。此外，由于来自热电联产厂的废水较少，FGQ的集成可为市政废水处理厂提供潜在的每年节能约13.1 MWh。FGQ的整合还通过增加内部使用的净水量（每天约57吨）减轻了外部淡水使用的负担。此外，由于来自热电联产厂的废水较少，FGQ的集成可为市政废水处理厂提供潜在的每年节能约13.1 MWh。FGQ的整合还通过增加内部使用的净水量（每天约57吨）减轻了外部淡水使用的负担。此外，由于来自热电联产厂的废水较少，FGQ的集成可为市政废水处理厂提供潜在的每年节能约13.1 MWh。