With the impending release of Best Available Techniques (BAT) conclusions on waste incineration, existing European waste-to-energy (WtE) plants will be required to achieve a higher efficiency in the removal of several target pollutants, such as acid gases (above all, HCl and SO2). The direct injection of a sorbent in the furnace as a primary deacidification stage may be a cost-effective option to achieve the required performances. The present study investigated the furnace injection of a specific dolomitic sorbent, with the aim of identifying the techno-economic optimum for the sorbent feed rate considering different scenarios of flue gas composition. A full-scale test run campaign was carried out on two WtE plants and a phenomenological model linking HCl and SO2 conversion to reactant feed rate was developed. The model allowed assessing the cost-effectiveness of dolomitic sorbent furnace injection for WtE plants equipped with either a single or a two-stage acid gas treatment system. The addition of dolomitic sorbent resulted particularly suitable for WtE plants equipped with a single stage treatment coping with a high SO2 concentration in the flue gas, where the injection of dolomitic sorbent can increase the redundancy of flue gas treatment with a reduction of the total operating costs.

中文翻译：

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通过熔炉直接吸附剂注入，将废料转化为能源的工厂中的HCl和SO2的技术经济性能。

随着即将发布的有关废物焚化的最佳可行技术（BAT）结论的出台，将要求现有的欧洲废物能源转换厂（WtE）达到更高的去除某些目标污染物（例如酸性气体）的效率（首先，HCl和SO2）。作为主要的脱酸步骤，在炉子中直接注入吸附剂可能是实现所需性能的一种经济有效的选择。本研究调查了特定白云石吸附剂的炉内注入，目的是在考虑烟气成分不同情况的情况下，确定吸附剂进料速率的技术经济最优。在两个WtE工厂上进行了全面测试，并建立了将HCl和SO2转化率与反应物进料速率联系起来的现象模型。该模型允许评估配备有单级或两级酸性气体处理系统的WtE工厂的白质吸附剂炉注入的成本效益。白云石吸附剂的添加特别适合于配备了单阶段处理以应对烟气中高SO2浓度的WtE工厂，在该工厂中注入白云石吸附剂可以增加烟气处理的冗余度，并降低总运营成本。