Nebraska, NB-500D-50, 2007, 100,000 lb/hr, 250 psi, D-Type Watertube Steam Generator

Description

  1. Overview
    1. Quantity: 2
    2. Model: NB-500D-50
    3. Year: 2007
    4. 100,000 lb/hr, 250 psi each
    5. D-type watertube steam generators
    6. Natcom hyper mix low-nox burner assembly
    7. Available together or separately
  2. Specifications
    1. Nebraska boiler 100,000 lb/hr package “D-type”, 250 psig
    2. Model NB-500D-50 shop-assembled, packaged, "D-type" watertube steam generator, 250 psig design
    3. Continuous capacity of 100,000 lbs/hr of dry and saturated steam when supplied with feedwater to the economizer at 228°F and firing natural gas
    4. Unit complete including equipment and accessories as described
  3. Steam Trim
    1. Safety valves
    2. Blowoff valves
    3. Nebraska boiler water column with water gauge, water gauge valves, high and low water alarms, and primary low water cutout
    4. Water column, water gauge, and low water cutout drain valves
    5. Auxiliary low water cutout
    6. Steam gauge with steam gauge valve
    7. Continuous blowdown stop and manual control valves
    8. Chemical feed valve
    9. Vent valve
    10. Shunt button for draining water column without tripping low water cutout
    11. Main steam non-return and stop valves with vented spool piece
  4. Feedwater Trim
    1. Feedwater control valve
    2. Feedwater stop valve and feedwater check valve
    3. Feedwater three-valve bypass around control valve
  5. Sootblower Assemblies
    1. Sootblower wallboxes and bearings to facilitate ease of installation of sootblowers if required by others (since present fuels do not require sootblowing equipment)
  6. Natcom Hyper-Mix Low-Nox Burner Assembly
    1. Burner windbox and fresh air inlet damper with actuator
    2. Windbox-mounted forced-draft fan with 50 hp electric fan motor
    3. Natural gas pilot train
    4. Natural gas and #2 fuel oil main fuel trains
    5. Steam train for steam atomizing of fuel oil
    6. Fireye BMS/flame safety system
    7. Microprocessor-based combustion/feedwater controllers in local control panel
    8. Instrumentation to execute fully-metered, cross-limited combustion control system with O2 trim and three-element feedwater control strategy
  7. Natcom Emissions-Reduction Equipment
    1. FGR equipment to induce the flue gas into the FD fan
    2. FGR ducting from economizer outlet to FGR mixing box inlet
    3. FGR mixing box with damper and actuator, mounted on FD fan inlet
    4. Manual-set FGR damper mounted in FGR ducting
  8. Economizer and Stack Assembly
    1. Breeching from boiler to economizer
    2. Steel economizer support structure
    3. 50’ tall (from ground) carbon steel stack
  9. Miscellaneous
    1. O&M manuals
    2. Fully membrane (water cooled) furnace construction
    3. Expansion joint