This project has conducted air pollution source surveillance over 72 factories including 22 plants of petroleum industry, 17 plants of semiconductor industry, 6 plants of photoelectric industry, 5 plants of plastics (including adhesive tape) industry, 5 plants of paint manufacturing industry, 7 plants of printed circuit board industry, 1 plant of coal organic compound refinery industry, 2 plants of surface printing and gravure printing industry, 2 plants of car and motorcycle surface coating industry and 5 plants of dry cleaning industry. By following criteria of relevant regulations regarding to the controlled industries, all plants comply with relevant regulations, certain plants found to potentially breach the regulations were asked to make improvement immediately. In field surveillance, all plants were found to meet permit conditions in replacing activated carbon regularly for air pollution control devices. In 150 days of general odor inspections, 74.7% revealed to be odor degree 1.
17,010 process components from 22 plants have been tested, among which 8 plants’ results showed 100% compliance with standard. 87 tested process components exceeded leaking definition, 17 ones were accounted from CPC Da-Lin plant and 16 ones from CPC Kaohsiung plant. All of the 87 failed process components have been repaired and resulted in an emission reduction of 12.64 ton/year. After analyzing the emission amount of process components from 22 plants, the results revealed that average factor > leaking and tightness > layer factor > relevant formula which came up to 10 times differences. This project team has finished A/L ratio audit test on 100 gas stations, and pipeline pressure drop leak test on 30 ones. 2,208 gas guns have been tested, and the result showed 2,131 ones comply with standard, or 99.5% of compliance rate. The emission reduction resulted from improvements of the gas stations is 20.81 ton/year.
This project has compiled emission inventory for VOCs polluters of 2010. The emission rate from petroleum industry is the highest and accounts for 58.9% of total emission in Kaohsiung City, the second is 20% from paint manufacturing industry. The fence-line VOCs monitoring of 3 petrochemical plants were investigated by Open-Path Fourier Transform Infrared Spectrometry (OP-FTIR) at petrochemical industrial parks, port areas and complained areas for minimum 120 hours at each plant. The results from OP-FTIR monitoring are as follows: (1) Compounds such as 1,3-butadiene (120.13ppb), o-xylene (289.23ppb), cyclohexane (89.71ppb) were identified at the China Petrochemical Development Corporation (CPDC) Siaogang plant and the occurrence of propene had the highest frequency, the following was 1,3-butadiene. The pollution sources were presumed to come from the dimethylbenzene storage tank and nearby flares according to the pollution wind-rose diagram. (2) 11 VOC species were observed at CPC Kaohsiung Plant, compounds ethylene (2172.61ppb) and methane (2175.64ppb) were identified most frequently. The emission sources are presumably from the isomerization process, hydrocracking process and Hydrogen desulfurization process. The process components and the breather valves in the isomerization factory and the second alkylation factory were supposed to be the source of leakage. (3) 13 VOC species were observed at CPC Da-Lin Plant, Compounds butane (744.39ppb), methane (378.6ppb), 0-xylene (174.05ppb), tert-Butyl methyl ether (173.27ppb), cyclohexane (144.7ppb) were identified most frequently. The naphtha cracking/gasoline blending factory and the nearby flares were revealed to be the sources of pollutants. Emission reduction counseling was established against CPC Da-Lin plant, CPC Kaohsiung plant and CPDC Siaogang plant based on the inspection results and the previous declaration data, along with committee on-site inspection and consultation. The procedures provided the firms sufficient VOC reduction strategy. From the on-site assessment of the reduction efforts by the committee, the total reduction of VOC emissions reached 182.79 ton/year by tracking up the improvement of 12 plants.
Benzene, toluene and xylene qualitative/quantitative analysis were carried out for exhaust ducts of 6 plants, and the results showed compliance with relevant standards. fence-line odor tests exceeded standard out of 30 points in 22 plants, two points were over the standards which accounts for 6.7%. Fence-line GC/MS compound analysis was carried out at 5 points. Odor tests were conducted over the 6 exhaust ducts and 2 of them exceeded the limit which accounted for 33.3% of the overall tests. Pollution fingerprint data bank for 293 plants in 4 industrial parks, including Lin-Hai Industrial Park, Nan-Zi Export Processing Zone, Lin-Guan Industrial Park and Kaohsiung Export Processing Zone, was compiled 1,748 materials and 293 products. 237 species of pollutants were found in 6 exhaust duct VOCs tests and 20 points of CC-FTIR monitoring. Pollution fingerprint data bank of high risk sources was compiled from the data of 20 extractive FTIR tests. OP-FTIR monitoring task verified pollutant species, concentration range and wind direction from pollution sources which located 1 km upwind of sensitive receptors such as communities, schools and hospitals in summer and winter.
The average combustion efficiency of the overhead flare (A015) is 80.8% and is evaluated from the ground flare (A014) combustion efficiency which was calculated using P-FTIR optical remote sensing and CC-FTIR with tracer gas release techniques. Summing up the achievements of all tasks, it is estimated the reduction of VOCs emission would reach 2047.72 ton/year.
