Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces
碩士 === 國立中央大學 === 環境工程研究所 === 91 === Many studies indicate that both municipal waste incinerators (MWIs) and the industrial activities containing combustion processes are important sources of PCDD/F emissions. Local studies indicate that dioxin in ambient air originates mainly from electric arc f...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2003
|
Online Access: | http://ndltd.ncl.edu.tw/handle/93325308857238729568 |
id |
ndltd-TW-091NCU05515019 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-091NCU055150192016-06-22T04:14:52Z http://ndltd.ncl.edu.tw/handle/93325308857238729568 Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces 電弧爐煉鋼廠煙道戴奧辛排放特性之初步探討 Shian-Sheng Tsai 蔡憲昇 碩士 國立中央大學 環境工程研究所 91 Many studies indicate that both municipal waste incinerators (MWIs) and the industrial activities containing combustion processes are important sources of PCDD/F emissions. Local studies indicate that dioxin in ambient air originates mainly from electric arc furnaces. Electric arc furnaces (EAFs) have been identified as the major sources of PCDD/F emissions in Taiwan. Two kinds of EAFs including the direct evacuation system and the building evacuation system are selected for measuring the dioxin emission. Results indicate that the PCDD/F concentration of stack gas in EAF-A was 22.50 ng/Nm3, and the total Toxic Equivalent Quantity (TEQ) concentration was 1.72 ng I-TEQ/Nm3. The PCDD/F concentration of stack gas in EAF-B was 2.19 ng/Nm3, and the TEQ concentration was 0.14 ng I-TEQ/Nm3. This result showed that the direct evacuation system emitted more dioxin than the building evacuation system. The other results obtained on gas/particulate partitioning of PCDD/Fs in EAFs indicate that more than 90% in the particulate-phase before the flue gas passed through APCD. The emission factor of EAF-A is 11.62 ng-I-TEQ/kg-product, while 7.36 ng-I-TEQ/kg-product is found for EAF-B. 1,2,3,4,6,7,8-HpCDF, OCDD and OCDF were the major contributors of the dioxin concentrations in each phase and the percentage of PCDD/F in particulate phase increases with the chlorination level of the PCDD/F congeners. The distributions of total Toxic Equivalent Quantity (TEQ) concentrations on 2,3,4,7,8-PeCDF at each sampling site were about 50%. Moo-Been Chang 張木彬 2003 學位論文 ; thesis 101 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 國立中央大學 === 環境工程研究所 === 91 ===
Many studies indicate that both municipal waste incinerators (MWIs) and the industrial activities containing combustion processes are important sources of PCDD/F emissions. Local studies indicate that dioxin in ambient air originates mainly from electric arc furnaces. Electric arc furnaces (EAFs) have been identified as the major sources of PCDD/F emissions in Taiwan.
Two kinds of EAFs including the direct evacuation system and the building evacuation system are selected for measuring the dioxin emission. Results indicate that the PCDD/F concentration of stack gas in EAF-A was 22.50 ng/Nm3, and the total Toxic Equivalent Quantity (TEQ) concentration was 1.72 ng I-TEQ/Nm3. The PCDD/F concentration of stack gas in EAF-B was 2.19 ng/Nm3, and the TEQ concentration was 0.14 ng I-TEQ/Nm3. This result showed that the direct evacuation system emitted more dioxin than the building evacuation system. The other results obtained on gas/particulate partitioning of PCDD/Fs in EAFs indicate that more than 90% in the particulate-phase before the flue gas passed through APCD. The emission factor of EAF-A is 11.62 ng-I-TEQ/kg-product, while 7.36 ng-I-TEQ/kg-product is found for EAF-B. 1,2,3,4,6,7,8-HpCDF, OCDD and OCDF were the major contributors of the dioxin concentrations in each phase and the percentage of PCDD/F in particulate phase increases with the chlorination level of the PCDD/F congeners. The distributions of total Toxic Equivalent Quantity (TEQ) concentrations on 2,3,4,7,8-PeCDF at each sampling site were about 50%.
|
author2 |
Moo-Been Chang |
author_facet |
Moo-Been Chang Shian-Sheng Tsai 蔡憲昇 |
author |
Shian-Sheng Tsai 蔡憲昇 |
spellingShingle |
Shian-Sheng Tsai 蔡憲昇 Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
author_sort |
Shian-Sheng Tsai |
title |
Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
title_short |
Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
title_full |
Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
title_fullStr |
Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
title_full_unstemmed |
Evaluation of the Emission Characteristics of PCDD/Fs from Electric Arc Furnaces |
title_sort |
evaluation of the emission characteristics of pcdd/fs from electric arc furnaces |
publishDate |
2003 |
url |
http://ndltd.ncl.edu.tw/handle/93325308857238729568 |
work_keys_str_mv |
AT shianshengtsai evaluationoftheemissioncharacteristicsofpcddfsfromelectricarcfurnaces AT càixiànshēng evaluationoftheemissioncharacteristicsofpcddfsfromelectricarcfurnaces AT shianshengtsai diànhúlúliàngāngchǎngyāndàodàiàoxīnpáifàngtèxìngzhīchūbùtàntǎo AT càixiànshēng diànhúlúliàngāngchǎngyāndàodàiàoxīnpáifàngtèxìngzhīchūbùtàntǎo |
_version_ |
1718316273837801472 |