UCC Launches Viper Mill for Dry Sorbent Injection Systems

Viper mill technology reduces operating cost and improves emissions control of dry sorbent injection (DSI) systems. A proven, patent-pending technology, the Viper mill reduces sorbent particle size for better removal of SO2, SO3, and HCl. Featuring high mill throughput, the mill is capable of processing up to 7 tn/hr of sorbent on a 24/7 basis. It utilizes an in-line milling process eliminating the need for problematic downstream sorbent storage.

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

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 Viper mill can reduce sorbent usage by 30-50 percent. That equates to a $3 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 percent.

The Viper mill can ship on a fully pre-piped and pre-wired skid for simple installation and lower installed cost, and is available in standard and custom designs. The modular skid system features a patent-pending 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.

United Conveyor Corp., Waukegan, IL 847-473-5900 www.unitedconveyor.com