| 英文摘要 |
This project investigated the emission of dioxin and heavy metal sampled from stationary sources in Kaohsiung County. Major works included the emission source sampling of dioxin and heavy metals, the emission source inquiry of dioxin, and the control strategy building of dioxin. The achievements of this project are described as below:
1.The existing emission sources of dioxin were surveyed, including 2 MSWIs, 4 IWIs, 2 MWIs, 1 EAF, 1 MMS, 5 ALS, 2 VCMs, 1 OTHER, 1 WFB and 1 CFB. The mean total PCDD/Fs concentrations of stationary sources MSWI, IWI, MWI, EAF, MMS, ALS, VCM, OTHER, WFB and CFB were 0.020, 0.045, 0.064, 0.052, 0.019, 0.038, 0.243, 0.006, 0.089, 0.006 ng I-TEQ/Nm3, respectively. All of them are lower than the regulation limit of Taiwan EPA.
2.The PCDD/F emission factors of stationary sources MSWI, IWI, MWI, EAF, MMS, ALS, VCM, OTHER, WFB and CFB were 0.139, 0.257, 1.01, 0.362, 7.31, 0.412, 0.965, 0.005, 0.659, 0.055 μg I-TEQ/ton.
3.The estimated total annual emission of PCDD/Fs from these emission sources in Kaohsiung County was 1.934 g I-TEQ/yr. Major PCDD/Fs contribution source was CFB (45%). For the emission source inquiry of dioxin, Fu-Tai and Ren-Wu cremation are no record the operating conditions of the equipment. The equipment elements of Sheng-Yuan and Guan-Di were unnormal.
4.The existing emission sources of heavy metals were surveyed, including 5 IWIs, 1 MWI, 1 DUC, 9 ALS, 1 WFB, and 3CFBs. The mean total Pb concentrations of stationary sources IWIs, MWI, DUC, ALS, WFB, and CFBs were 0.0434, 0.0325, 0.0464, 0.0381, 0.0364, 0.0133 mg/Nm3, respectively. The Cd concentrations for mos stacks were lower than instrument detection limit except for ALS-8 (0.0523 mg/Nm3). The Hg concentrations for IWI-3, ALS-10 and CFB-1 were 0.156, 0.0037, 0.0011 mg/Nm3, respectively; others were non-detected (ND). Moreover, The Hg concentration for IWI-3 (0.156 mg/Nm3) is higher than the regulation limit of Taiwan EPA (0.1 mg/Nm3).
5.The emission factors of Pb for IWIs, MWI, DUC, ALS, WFB, and CFB were 0.446, 0.691, 2.19, 0.771, 0.304, 0.127 g/ton, respectively. The emission factor of Cd for ALS-8 is 1.03 g/ton. The emission factor of Hg for IWI-3, ALS-10, and ALS-10 were 0.0167, 0.0724, and 0.00919 g/ton, respectively.
6.The results of annual emissions of heavy metals indicated that ALS, DUC, WFB and CFBs have an emission potential for Pb. these Pb annual emissions are even more than that of IWIs and MWIs.
7.The project invited the experts to give some evaluations and suggestions for 4 stationary sources in Kaohsiung County. The sampling results indicated that Yu-Fong, Dong-Feng and Tiwan VCM had some improvements due to PCDD/Fs values are lower than the regulation limit of Taiwan EPA. However, they need to strengthen for improving the operation of feedstock and control equipment. The results sampled from VCM process of Tai-Su (Renwu Dist) indicated that the PCDD/Fs concentration is not higher than the regulation limit of Taiwan EPA. The PCDD/Fs concentration in this year (2011) is higher than that of recent years due to the varied flue gas composiotion. The experts suggested VCM process of Tai-Su (Renwu Dist) to check the feedstock composition and to revise the operating condition of air pollution control equipment.
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