recovery lime spray dryer. steam generators and lime spray dryer – main stack Middletown Coke Company presented a redundant FGD system as a possible control option to control emissions when FDG maintenance is being performed which would require the installation of a spray dryer/baghouse with instrumentation along with steel ductwork with dampers. Middletown Coke Company deemed that this option as technically feasible, but presented documentation in the application that it was not cost effective to employ this option during FDG maintenance. Based upon that analysis, the following was deemed to satisfy BACT/LAER requirements. Process LAER/BACT LAER/ LAER/ LAER BACT BACT Control BACT BACT Opacity Rate Rate for Rate for for PM (tpy) (tpy) Coking Work Visible Based 6.3 6.3 6.3 practices upon and with limited of heat number of shall 0.049 hours not gr/dscf steam operated exceed (5 20% and days/year) opacity, lime as a spray minute dryer average. – main stack No visible when the lime spray dryer is shall bypass be from the common battery tunnel or its
recovery steam generators and lime spray dryer – main stack lime spray dryer. Middletown Coke Company presented a redundant FGD system as a possible control option to control emissions when FDG maintenance is being performed which would require the installation of a spray dryer/baghouse with instrumentation along with steel ductwork with dampers. Middletown Coke Company deemed that this option as technically feasible, but presented documentation in the application that it was not cost effective to employ this option during FDG maintenance. Based upon that analysis, the following was deemed to satisfy BACT/LAER requirements. Process LAER/BACT Control LAER/ BACT Opacity LAER/ BACT LAER Rate for (tpy) BACT Rate for BACT Rate for PM (tpy) Coking with heat steam and lime spray dryer – main stack when the lime spray dryer is Work practices and limited number of hours operated (5 days/year) Visible shall not exceed 20% opacity, as a average. No visible shall be from the common battery tunnel or its Based upon of 0.049 gr/dscf 6.3 6.3 6.3 minute bypass
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