I to work at a WWTP solids incineration area. Located in St. Paul, Mn. The Metro SMBU has Gravity and Flotation Thickening. 6 Alfa Laval decanting centrifuges drop the cake into Shwing holding bins and pumped into 3 Von Ruoth FBR’s. We run Temps no greater than 1400, for slag reasons. Each FBR is capable of 17 wet tons per hr. Then passes through a primary heat exchanger to pre heat the FAB air. Then onto waste heat water tube boilers, then a carbon reactor for mercury. The bag house comes next, followed by a secondary heat exchanger. After that is a wet scrubber and wet electrostatic prociprcator and then the ID fan to the stack. We have a positive pressure ash sys. that really sucks. Currently building a 4th train for more reliable operations. The 3 FBR’s are only 14 yo,but have serious boiler tube leaks as the ash is abrasive and corrosive.
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