Abstract
Rapid analytical methods for the concentration of dioxins in flue bypass gas at Eco-cement demonstrated plant have been investigated in this experiment. As a result of the investigation, it is confirmed that there are some correlations between dioxins concentration and TOX concentration in the flue bypass gas. TOX is one of the substituted index for regulating dioxins concentration. The dioxins concentration simultaneously measured was about 0.01～1ng-TEQ/m3N. The regulated TOX concentration value was 100μg/m3N for the strictest dioxins environmental quality standard. This strictest emission standard of dioxins concentration of flue gas is 0.1ng-TEQ/m3N. It takes about 1 hour to measure TOX concentration.
Besides the result of TOX, it is also confirmed that there is a similar correlation between the dioxins concentration and the chlorobenzene concentration in the same gas. Especially the chlorobenzene that 5 or 6 hydrogens of benzene are chlorinated are striking for that tendency. So it is judged that chlorobenzene can also be used for the substituted index for the dioxins concentration in the flue bypass gas.
CO and EIA were judged to be not suitable for the substituted index being used as the dioxins regulation concentration.
