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ALCOSAN Waste Water Treatment
Plant (WWTP)
Project Description Fluidizing air is preheated to 400o F through a flue-gas-to-air preheater and a steam to air preheater before entering the combustion process. The preheated air allows self-sustaining combustion without the addition of auxiliary fuel. Flue gases leave the fluid bed combustion cell at about 1550o F and pass through an afterburner, where odorous gases, collected from throughout the plant, are burned. The flue gases leaving the afterburner pass through a forced circulation boiler, where about 26,400 pph steam at 450 psig and 460o F are produced. They then pass through a high efficiency multiple cyclone dry collector, an economizer and the air preheater. Final particulate removal consists of a high energy variable throat venturi scrubber, followed by a three tray impingement scrubber to remove acid gases. The tray scrubber is equipped with a two stage chevron and mesh mist eliminator. The ID fan, located after the scrubber, delivers the cleared flue gases to the stack. A unique feature of this project is the requirement for a proven inert removal and bed material reinjection system. EPI's patented tramp removal system automatically removes contaminated bed material from the vessel, screens the material to remove the grit and returns the cleaned bed material to the combustor while the system remains in full operation. Scope of Supply
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Energy Products of Idaho
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