Dry Scrubber Nozzles - 101
Presenter: Stewart McKenzie, Lechler USA
Dry scrubber operators are faced with many different challenges. They must guarantee a reliable continuous mode of operation while achieving strict emission requirements which creates a constant pressure to invest and innovate despite increasing staff turnover without properly transferring knowledge and experience to lesser experienced team members. It may be assumed that spray nozzle operation is well understood; however, several operating issues are observed ranging from nozzle build up to wetting reactors, hoppers, bags, etc. are still experienced and avoidable. This presentation will give more insight to ‘how’ and ‘why’ the spray nozzles are designed, operated and maintained to educate end users to help avoid common pitfalls observed in the field and help optimize dry scrubbing performance. This session will be a discussion around several relevant subjects regarding dry scrubber spray nozzles that range from nozzle design to proper maintenance to lessons learned.
SCR Inlet DSI Lessons Learned
Presenter: Dave Luchtenberg, AEP
American Electric Power (AEP) was one of the first utilities to test and implement the dry sorbent injection (DSI) solution starting with SO3 emission control using trona. Over the decades of DSI experience AEP has a multitude of experience and lessons learned in terms of application of the solution as well as equipment design/operation as they’ve utilized DSI for HCl as well as SO2 emission control across their fleet. Over the past few years AEP has started to transition to injecting sorbents upstream of their selective catalytic reduction (SCR) systems as a means to optimize their DSI solution. This presentation highlights AEP’s lessons learned over the years as they’ve gained experience injecting upstream of their SCRs specifically at their Rockport facility which uses sodium bicarbonate for SO2 emission control.