Standing in front of the coal conveyor from storage to transfer at German brown-coal unit.
WFGD absorber modules come in all shapes and sizes, and I have worked on them all – limestone with inhibited oxidation; limestone with forced oxidation; limestone with buffering additives; magnesium-enhanced lime; sodium-based including waste soda liquor.
I’ve worked on SO2 absorbers that include up-front venturi’s for particulate (quite rare anymore on utility units but not uncommon on industrial units) and sulfur dioxide removal, spray towers, packed towers, tray towers, multi-unit installations, down-flow, upflow, large single vessel installations.
Accessory equipment such as large recirculation pumps, agitators, bleed slurry pumps, hydroclones, entrainment separation, milling systems, dewatering, solids settling, valves, and instrumentation. I have investigated all these issues. This also includes P&ID review, piping layouts, flue and ductwork, along with coatings and linings on tanks.
We were hired to investigate the reasons for internal scaling and perceived under-performance of this small, packed tower designed to capture reduced sulfur compounds using sodium-based reagents. We reviewed past performance testing and suggested a number of alternatives that could be adopted moving forward to provide long-term performance improvements.
Was hired to investigate if a small-wood fired unit should replace the CO catalyst. The unit had a low CO limit, and coupled with some operating impacts was interested in a third-party review of the need for replacement.
Particulate emissions can be controlled a number of ways – via cyclonic separation; through high-pressure drop venturi’s; by high efficiency electrostatic precipitation and fabric filters. These are the workhorses of the industry. We should also include entrainment separators for their work as droplet impingement devices, since they also have a part to play in many process installations by minimizing liquid carryover. I’ve worked on all of these collection devices.