Emitted and Removed Levels of HCl and SO<SUB>2</SUB> from Municipal Waste Incinerators

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  • Tanikawa Noboru
    Tokyo Metropolitan Research Institute for Waste Management
  • Urano Kohei
    Laboratory of Safety and Environmental Engineering, Faculty of Engineering, Yokohama National University

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  • 都市ごみ焼却施設における排ガス処理技術の適用による塩化水素と二酸化硫黄の排出削減量
  • トシ ゴミ ショウキャク シセツ ニ オケル ハイガス ショリ ギジュツ ノ

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HCl and S02 concentrations in flue gas from municipal waste incinerators were investigated for different removal equipment for HCl and SO2. The emitted and removed levels of HCl and SO2 from the municipal waste incinerators in the ward areas of Tokyo and throughout Japan were estimated.<BR>When the removal equipment was not used, the mean concentration of HCl ranged from 300 to 650 ppm. This range was dependent on the sorting and collection method of plastics in the waste, gas temperature control methods, and dust removal methods. The mean concentration of SO2 ranged from 44 to 63 ppm, and was dependent on dust removal methods.<BR>In the case where the calcium powder injection method and the electrostatic precipitator (EP) were adopted, the mean concentrations of HCl and SO2 ranged from 200 to 410 ppm, and 30 ppm, respectively. In the case where EP and a wet scrubber were adopted, the mean concentration of HCl ranged from 6 to 12 ppm, and the mean concentration of SO2 was about 2 ppm.<BR>In the ward areas of Tokyo, the amount of incinerated waste in 1994 increased by 1.4 times over that for 1980. However, the amount of HC2 and SO2 that was emitted from municipal waste incinerators in 1994 was slightly higher than those in 1980 because of the adoption of removal equipments.<BR>In Japan overall, the emitted amount of HCl and SO2 from municipal waste incinerators in 1992 was estimated to be 9.1×104 t/y and 1.8×104 t/y, respectively. And the removed amount was estimated to be 7.6×104 t/y and 2.0×104 t/y, respectively.

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