The enormous success of the company-developed modular SCR system on Nationwide Boiler's rental fleet suggested to company management that a market existed for a field-retrofit system for package boilers, and thus the CataStak™ SCR System was born.
Compliance Assurance
The table below highlights a sample of typical performance indicators for package watertube boilers at varying temperatures and NOx requirements. The CataStak™ SCR System resulted in total compliance for each unit, even exceeding current emission limits required by local air quality districts at the time.
CataStak™ SCR System |
Test |
#1 |
#2 |
#3 |
Firing Rate |
100% |
100% |
100% |
Steam Flow (Note #1) |
61,131 lb/hr |
73,050 lb/hr |
65,500 lb/hr |
Boiler Gas Outlet Temp. (Min) |
379 °F |
385 °F |
368 °F |
Boiler Gas Outlet Temp. (Max.) |
550 °F |
614 °F |
570 °F |
Boiler NOx (corrected to 3%) |
25 PPM |
20 PPM |
25 PPM |
Stack NOx (corrected to 3%) |
4 PPM |
2 PPM |
7 PPM * |
Ammonia Slip |
<5 PPM |
<5 PPM |
<5 PPM |
NOx Permitted Limit 5 ppm unless otherwise noted
Note 1 - Steam Flow is based on feedwater flow
*NOx Limit 9 ppm
200,000 PPH CataStak™ SCR System Package Watertube Boiler Installation
Read out latest literature about the CataStak™ SCR System and learn how the CataStak™ provides immediate emission reductions.
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