Based upon the results from nine installations (see table), the V-Temp economizer system has provided a cost-effective, technically superior design for SCR inlet gas temperature control.
The benefits of the V-Temp economizer system are:
1) lower maintenance costs,
2) an extended turndown range,
3) lower gas side pressure drop, and
4) a total installed cost that is equal to or less than other gas-side temperature control alternatives.
An additional future benefit of the V-Temp economizer system is its capability to be used with a furnace/downcomer recirculation system that will allow the SCR to be operational at even lower loads. The combination of these systems will allow for very low load boiler turndown.