TVA's 1-MW Pilot Plant:Final Report on High-Velocity Scrubbing and Vertical Duct Mist Elimination.

摘要

The report describes the systematic test program that led to the development of washing techniques that maintain continuous mist eliminator performance for lime/limestone closed-loop scrubbing systems. TVA recently demonstrated the techniques at its 1-MW pilot plant at the Colbert Power Plant. The report also describes high-velocity scrubbing tests performed in conjunction with the mist eliminator tests. Continuous operation of the chevron mist eliminator,positioned horizontally in a vertical duct,in the limestone system was maintained (after extensive testing at 12.6ft/sec) by washing the bottom of the mist eliminator intermittently with all the available clarified liquor,immediately followed by an allocated amount of makeup water. The top of the mist eliminator was washed intermittently with the remaining allocation of allowable makeup water. At a gas velocity of 16ft/sec,the scrubber operated more efficiently and mist eliminator performance was improved. Continuous mist eliminator performance in the lime system was maintained at 12.5and 16ft/sec by washing the bottom of the mist eliminator intermittently with an allocated amount of allowable makeup water. The remainder of the allocated makeup water was used to intermittently wash the top of the mist eliminator.