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首页> 外文期刊>International Journal of Environmental Impacts: Management, Mitigation and Recovery >Evaluating Optimum Hydrated Lime Dosage in Reducing Stack Emissions During Incineration of Waste
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Evaluating Optimum Hydrated Lime Dosage in Reducing Stack Emissions During Incineration of Waste

机译：Evaluating Optimum Hydrated Lime Dosage in Reducing Stack Emissions During Incineration of Waste

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摘要

Incineration is any procedure, technique or method that transforms waste to flue gases and by-products by means of oxidation. Although the recommended way of treating healthcare risk waste is through incineration, the utilization of incinerators is still disputable. The fundamental problem for incinerators in the Republic of South Africa started with the new amended Section 21 of the National Environmental Management Act: Air Quality Act known as NEMA: AQA 39 of 2004 that requires stack emissions to be reduced by almost 50. Since the promulgation of the standard, incineration facilities have not been complying with the emissions standard. This study was conducted to investigate the optimum hydrated lime Ca(OH)_2 dosage required to reduce acid gas emissions to the required level. The dosage rate was then raised and kept between 2.5 and 3.5 kg/h. This technology was able to achieve a high removal efficiency of 97 for HCl, 86 for HF, 83 for NO, 87 for SO_2 and 74 for NO_2. The optimum emissions removal temperature for HCl was between 1190℃ and 1200℃, 1020℃ for SO_2 and NO_2, and between 1120℃ and 1200℃ for NO_2. The optimum Ca(OH)_2 dosage for maximum NO removal was 3.1 kg/h, HF was 2.9 kg/h, SO_2 was 2.8 kg/h, NO_x was 2.8 kg/h and HCl was 3.2 kg/h.

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