冷凝再热技术在含铜固废处理厂烟气消白中的应用

Application of Condensation Reheating Technology in White Smoke Elimination of a Copper Solid Waste Treatment Plant

湿法脱硫后烟气基本处于饱和状态,由于烟气中含有大量的水蒸气,一旦排入大气,与周围冷空气接触降温,会产生大量白烟。本文以某含铜固废处理项目为例,介绍工艺烟气和环境集烟两部分经过离子液法脱硫后的烟气成分,并经过消白方案比较,选择冷凝再热法,进而分析烟气消白设备的设计参数和冷凝再热消白技术的特点。生产实践表明冷凝再热技术不仅实现了水分、有害物质的联合回收,消白效果良好,基本全年无白烟、无拖尾现象,且不需要额外的热源,节约能耗,运行成本低。

After hydrometallugical desulfurization, the offgas is basically saturated. As the offgas contains a large amount of steam, once discharged into the atmosphere and cooled by the surrounding cold air, a large amount of white smoke will be produced. Taking a copper containing solid waste treatment project as an example, this paper introduced the composition of process offgas and secondary offgas after ionic liquid desulfurization, and the condensation reheating method was selected through comparison of white smoke eliminating technology, and analyzed the design parameters of the equipment and the characteristics of the technology. The production shows that this technology not only realizes the combined recovery of water and harmful substances, but also has good elimination effect. There is basically no white smoke and tailing throughout the year, and no additional heat source is required. It saves energy consumption and has low operating cost.