Appleby Coke Ovens, Scunthorpe by Manoj Sharma This paper was ...

---> Obs. in %ge---> Obs. in %geFigure – 7In the month of November’2008, the coke plants started getting the hit of worldwide economicslowdown. From 1 st week of November’2008 we have started reducing the production slowly and bythe end of December’2008, reduced the schedule by 20% of the capacity. The schedule reductionalso helped a lot in combustion of gases in the flues. The running average of stack obscurations wasshown in the graph (Graph – 1), before and after the project execution. There were some kicksbecause of change in settings of drafts and/or gas feeding but the overall trend is downwards andwithin the norms of EA.Daily average Obscuration Data of Stack 1807060504030201001/06/200808/06/2008807060504030201001/06/200808/06/200815/06/200822/06/200829/06/200806/07/200813/07/200820/07/200827/07/200803/08/200810/08/200817/08/200824/08/200831/08/200807/09/200814/09/200821/09/200828/09/200805/10/200812/10/2008Daily average Obscuration Data of Stack 215/06/200822/06/200829/06/200806/07/200813/07/200820/07/200827/07/200803/08/200810/08/200817/08/200824/08/200831/08/200807/09/200814/09/200821/09/200828/09/2008Graph – 119/10/200826/10/200802/11/200809/11/200816/11/200823/11/200830/11/200807/12/200814/12/200821/12/200828/12/200805/10/200812/10/200819/10/200826/10/200802/11/200809/11/200816/11/200823/11/200830/11/200807/12/200814/12/200821/12/200828/12/2008In order to further reduce the obscuration, changes in design of the nozzles (Figure – 8) are alsounder consideration in the flues where nozzle blocks got broken. The process needs to continue andefforts are ON to further reduce the obscuration level.Figure – 8