Gary A. Raemhild, Steven A. Jaasund--Since 1994 Regenerative Thermal Oxidizers (RTOs) have been applied to direct wood-fired OSB dryers for the purpose of VOC abatement. In early direct wood-fired OSB dryer applications many OSB producers felt that upstream particulate control was not necessary. However, the ash from the combustion of wood waste created a host of new operational problems for the RTO systems. This paper provides assembled historical particulate data and the correlation of these data with heat exchange media life in a downstream RTO. Only RTO units with random ceramic saddles were evaluated. The resulting trends showed that solid particulate levels in the range of 0.005 gr/sdcf (11.5 mg/Nm 3 ) were necessary for a ceramic bed life of five years or more. The most important recommendation is to insure that the upstream particulate control technology be properly maintained for maximum particulate collection in order to minimize operational problems with downstream RTO systems.
Product code: ENV0141Author: Raemhild, G.A., Jaasund, S.A.
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