EPA-100-FA12-03-A058

100

10,050 千元

2011/03/08

2011/12/31

周武雄

空保處

戴忠良

中興工程顧問股份有限公司

大氣空氣

空氣品質;空污減量;六輕離島工業區

air quality;air pollution reduction;the No.6 Naphtha Cracker off-shore island industrial zone

曹志宏

02-27698388#20866

choftsao@mail.sinotech.com.tw

本計畫主要工作內容包括整合分析空氣品質資料及污染成因探討、評估空品區減量管制工作推動及推動六輕離島工業區空氣污染減量工作三項。主要成果摘要如下： (一)空氣品質分析及污染成因探討 由近10年來空品不良率變化趨勢顯示，中部雲嘉南空品區於93~95年達到最高後即呈下降趨勢，99年空品不良率達歷年最低，100年1-10月空品不良狀況與99年同期相近，顯示空氣品質已逐步改善。 各類污染物近年來大都有下降情形，其中以中部空品區PM10改善趨勢最明顯，自94年起年平均濃度穩定改善，但雲嘉南空品PM10則無明顯改善情形。由測站PM10高濃度風向結果顯示彰化、崙背及朴子可能受鄰近河灘裸露地揚塵影響，而新營及安南站PM10高濃度較不固定，推測可能自於營建及裸露地等污染源。 長期NO2濃度降低幅度為各類污染物中最高，中部空品區90-99年改善22.9%，雲嘉南空品區亦有22.1%，比較CO濃渡亦呈改善趨勢，顯示車輛排放已有降低情形。 (二)空品區減量管制工作推動 截至9月底止共完對塑/橡膠製造及化學製品製造業2,116家工廠普查，計納管750家，掌握排放量352公噸。藉由擴大掌握點源污染源數量，逐漸掌握實際固定污染源數量與現況，減少排放量估算之不確定性。 另由許可排放量與申報排放比對結果顯示，申報排放量高於許可筆數不少，加上本計畫協同查時亦常發現現場污染源現況與許不一致情形。故建議未來應加強污染源操作狀況掌握，特別有防制設備之污染源更應落實操作，以達原設計之防制效率。 (三)推動六輕離島工業區空氣污染減量 六輕依據100/2/1發布生效之「VOCs標準」規定提出燃燒塔使用事件報告書，統計至8/9為止計188日數據。塑化輕油廠進廢氣總硫濃度大於650 ppm者佔59%，若總硫為H2S，則其濃度可能已經超過法規標準。 為使削減率達一定門檻之管制目的，法規要求廢氣燃燒塔操作條件，總淨熱值須大於12MJ/Nm3。依據同時段使用事件報告書，塑化輕油廠廢氣燃燒塔之總淨熱值小於12MJ/Nm3佔22%，可能已經違反法規。 六輕空污費疑似每年短報SOx約605噸/年，VOCs約2,023噸/年。其中燃燒塔熱值不足及設備元件<5ppm採用空污費排放係數兩項，建議可逕行追繳空污費，其它項目則需透過修改空污費係數改善。

空氣品質;空污減量;六輕離島工業區

EPA-100-FA12-03-A058-公開版.pdf

120MB

公開版

2012/4/1 上午 12:00:00

The three main tasks of this project include: 1) to integrally analyze air quality data and diagnose the causes of air pollution episode days; 2) to assess the performance of air pollution reduction control for air quality areas; and 3) to promote air pollution reduction for the No.6 Naphtha Cracker off-shore island industrial zone. The critical results are abstracted as bellow: 1) Air quality data analysis and air pollution causes diagnosis According to the variation of poor air quality rate in the last ten years, it can be seen that the rate of the Middle air quality area reached the highest level during 2004-2006 and then kept decreasing. The poor air quality rate came to the least in 2010, and stay at the same level from January to October in this year. This trend shows that the air quality of the Middle air quality area is gradually improved. PM10 is the item that was most obviously imporved among all kinds of air pollutants in the Middle air quality area. The concentration of PM10 has steadily decreased from 2005. However, there was no similar trend in the Yun-Jia-Nan air quality area. By analysing PM10 in high concentration and wind direction data, the high concentration occurred at the Changhua, Lunbei and Putzu sites was probably affected by wade dusts nearby. And the unsteady result of the high concentration showed up at the Shinying and Annan sites was considered from constrction or naked field. Long-term NO2 concentation is the item eliminated most among all kinds of air pollutants, which decreased 22.9% in the Middle air quality area and 22.1% in the Yun-Jia-Nan air quality area as well during 2001-2010. It can be seen that transportation emission also decreased by lower CO concentration. 2) Air pollution reduction control for air quality areas In this project, totally 2,116 industrial plant surveys of plastic/rubber products manufacturing and chemical products manufacturing were completed. About 750 industrial plants were managed, and 325 tons of air pollutants were controlled. Air pollution condition and the amount of air pollutants can be undertood and controlled more accurately with the increasing number of point sources that are managed. Uncertainty of air pollutants assessment can also be lessened for the same reason. Based on the comparison of permitted and registered amount of air pollutants, the summation of the registered amount is much higher than that was permitted. The differences were also learned from the plant surveys in this project. Therefore, enhancing operation inspection of point sources is strongly suggested to keep the industial plants surely practicing air pollution reduction, especially the plants that already have pollution prevention equipments. 3) Promotion of air pollution reduction project in the No.6 Naphtha Cracker off-shore island industrial zone The VOC data of the No.6 Naphtha Cracker off-shore island industrial zone in 188 days to August, 9, 2011 was compiled and calculated according to the latest “VOC standard” published in February, 1, 2011. The occurence rate of the condition that the total sulfur concentration of inletting waste gas over 650 ppm in the cracking plant is about 59%. If H2S were the contributor to the sulfur concentration, it would be against the national act. In order to make sure that the elimination rate can reach the specific target, the national act requires to operate flares while the total net heat value is higher than 12MJ/Nm3. However, it is shown in the events report of the cracking plant that the total net heat value of the flare is less than the limit, which also reveals that the plant might be against the national rule. It is suspected that there is a shortage of air pollution fee of the No.6 Naphtha Cracker off-shore island industrial zone. The amount is about 605 tons of SOx and 2,023 tons of VOCs each year. The payment of two defects, failed heat value of flare operation and the VOC emission concentration of equipment components are recommanded to be pursued. Other defects should be improved by revising the emission rates of air pollution control fee.

air quality;air pollution reduction;the No.6 Naphtha Cracker off-shore island industrial zone