CT# 01 - Kraft Recovery Boiler
Designed to fire Black Liquor generated by the Kraft Process to generate heat and recover the inorganics collected in the molten smelt collected at the bottom of the boiler.
Name |
# 2 Recovery |
Manufacturer |
Babcock and Wilcox |
Age |
Erected in 1963, Rebuilt in 2004 |
Designed Working Pressure |
5170 kPa |
Operating Pressure |
4140 kPa |
Steam Generation |
59 kg/s |
Black Liquor Solids |
3.6 million lbs/day |
Steam Temperature |
400 deg C |
Dimensions |
Furnace 28’5” X 31’6”; the distance from the furnace floor to the roof is 133’. The distance between the steam and mud drums is 28’. |
Emission Controls |
Wet bottom electrostatic precipitator with 6 collecting fields. Followed by a Roy-Lin Throat Venturi Scrubber and a Teller Cross-Flow Nucleation Scrubber. |
Other |
Rebuilt in 2004 at a cost in excess of $40M. |
Boiler Feedwater Treatment
Basic process flow: Raw mill water to Cation Bed Softeners (5) followed by Anion Bed Organic Traps (5) both working on a sodium cycle followed by Mixed Bed Demineralizers (5). Capacity to treat 100 l/s (runs dependant upon resin condition) to < 1.0 umhos and < 0.10 ppm silica.
Deaerators:
- Recovery:
two deaerators mounted on a common horizontal cylindrical feedwater storage tank, 18,000 kg capacity. North deaerator capacity 272,160 kg/hr capacity, south deaerator capacity 226,800 kg/hr. 240 kPa working pressure.
