Boiler Capacity Increase Longview, WA The No. 20 Boiler steaming rate on hog fuel was limited by the fuel feed system capacity at Longview Fiber. The system did not feed the furnace evenly and allowed uncontrolled air into the furnace causing poor combustion. The existing vibratory screen and vibrating distribution conveyor, original to the boiler, were replaced with a new disc screen, drag type distribution conveyor, fuel storage bin and four variable speed metering screws. A submerged bottom ash conveyor was also installed to eliminate uncontrolled tramp air when the existing ash hopper slide gates opened. The Challenge: Space was very limited for replacement of the screen and distribution conveyor and the addition of the fuel bin and metering screws. The demolition and construction was

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