United Conveyor Corporation’s new technology reduce emissions in dry sorbent injection systems


United Conveyor Corporation\'s new technology reduce emissions in dry sorbent injection systems


By Greentech Lead Team: United
Conveyor Corporation (UCC), a provider in ash handling solutions for the power
generation industry, unveiled VIPER Mill technology to reduce operating cost
and improve emissions control of dry sorbent injection (DSI) systems. VIPER Mill
provides utilities with the most efficient and economical method to meet
current and future emission limits and regulations.

By using an in-line milling process,
VIPER Mill reduces sorbent particle size for better removal of SO2, SO3 and
HCl. Featuring the highest mill throughput in the industry, the VIPER Mill is
capable of processing up to 7 tons per hour of sorbent on a 24/7 basis. The
in-line milling process eliminates the need for problematic downstream sorbent

The VIPER Mill is proven with trona
and coarse sodium bicarbonate sorbents commonly used in DSI applications with
eastern bituminous and PRB coal-fired power plants.

In an SO2 removal application, the
UCC VIPER Mill can reduce
sorbent usage by 30-50 percent. That equates to a $3.0 million annual savings
over unmilled trona for a typical 500MW PRB unit at a 60 percent SO2 removal
rate. In SO3 removal applications, the ultra-small sorbent particle size helps
to achieve aggressive ppm targets, while reducing trona usage by more than 50

 “Smaller particle size leads
to lower sorbent quantity consumed. The VIPER Mill delivers the fastest return
on capital investment. A single VIPER Mill can potentially reduce sorbent costs
by millions of dollars annually compared to other DSI systems,” said Jon
Norman, DSI Technology Manager, UCC.   

The modular skid system features an
automated cleaning system to eliminate sorbent build-up and is engineered to
provide easy access for preventative maintenance and life-cycle rebuilds. The
automated cleaning system enables a full system cleaning cycle in less than 30
minutes and redundant skids or a bypass system ensure continued operation.

In early 2011,UCC launched the
40DH Heated Blade Knife Gate Valve designed for on/off isolation service in
pneumatic conveying systems.