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首页> 外文期刊>Clean air >COMPARISON OF THREE OXIDIZING AGENTS FOR EFFICIENCY OF MERCURY REMOVAL IN A PACKED-BED WET SCRUBBER FROM INFECTIOUS WASTE INCINERATOR
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COMPARISON OF THREE OXIDIZING AGENTS FOR EFFICIENCY OF MERCURY REMOVAL IN A PACKED-BED WET SCRUBBER FROM INFECTIOUS WASTE INCINERATOR

机译：三种填充剂对感染垃圾焚烧炉袋装湿式除垢器除汞效率的比较

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摘要

One of the most importance problems of infectious waste incinerators is the control of heavy metals, especially mercury. The packed-bed wet scrubber is recommended for improving removal efficiency. A quantity of 5 kg of simulated waste including plastics, cottons, rubber gloves, and 1000 ppb pure mercury was used for feed waste per batch. Mercury was fed to the incinerator every 6-10 min at optimum operating temperature and combustion air during the incineration. Mass balance, mercury feed rate, and mercury concentration from the emission stack were used to determine the mercury removal efficiency. Three oxidizing agents, potassium permanganate, hydrochloric acid, and chlorine solution,' were selected as a mercury capture substance. As results, by adding 15, 50, and 75 ppm of potassium permanganate, the mercury removal efficiencies were 79, 90, and 99%, respectively. For hydrochloric acid, at pH 3.0, 4.0, and 5.0, the results showed that the removal efficiency was the same rate, at approximately 70%. Another oxidizing agent, chlorine, was added to the recirculation tank by various concentrations, 50, 75, and 100 ppm. The mercury removal efficiencies by the chlorine solution for those three concentrations were 75, 80, and 87%, respectively. By comparison, the plausible agent for mercury removal in a packed-bed wet scrubber is a potassium permanganate at concentration of 75 ppm. However, this agent is not 'significant for other air pollutants (CO, NO_x, and SO_2) in terms of removal efficiency or capability, as well as those of hydrochloric acid and chlorine solution.
机译：传染性废物焚化炉最重要的问题之一是控制重金属，尤其是汞。建议使用填充床湿式洗涤器以提高去除效率。每批次使用5千克模拟废物，包括塑料，棉花，橡胶手套和1000 ppb纯汞作为饲料废物。在最佳运行温度下，每6-10分钟将汞送入焚烧炉，并在焚烧期间将助燃空气送入焚烧炉。使用质量平衡，汞进料速率和来自排放烟囱的汞浓度来确定除汞效率。选择了三种氧化剂，即高锰酸钾，盐酸和氯溶液作为汞捕获物质。结果，通过添加15、50和75 ppm高锰酸钾，除汞效率分别为79％，90％和99％。对于pH为3.0、4.0和5.0的盐酸，结果表明去除效率相同，约为70％。将另一种浓度为50、75和100 ppm的氧化剂氯加入循环槽。对于这三个浓度，氯溶液的除汞效率分别为75％，80％和87％。相比之下，填充床湿式洗涤塔中用于除汞的有效剂是浓度为75 ppm的高锰酸钾。但是，就去除效率或性能以及盐酸和氯溶液的去除效率而言，该试剂对其他空气污染物（CO，NO_x和SO_2）并不重要。

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