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Compare Wheelabrator Facilities


WASTE TO ENERGY FACILITY

Mandatory service area: Spokane County / 430,000 ratepayers
Type of contract: Full service/Operate Wheelabrator / Waste Management
Ownership: City of Spokane
Financing ($110 million): Revenue Bonds - Mandatory debt to entire County
   Department of Ecology Grant ($60 million)
Start-up: 1991
Expenses and Revenues for 2009:
   Cost of Operation   $17.2 million  ($62 per ton)
   Cost of Ash Disposal   $4.1 million ($47 per ton)
   Cost of Debt  $9 million
TOTAL COSTS   $30.3 million
   Electricity Revenue   $11.4 million
   Materials Recovery  
$0.1 million
NET COST OF OPERATIONS 
$18.8million ($68 per ton)

Refuse Combustion:

Operation: 24-hours per day, 7 days per week
Process Lines: 2 @ 400 tons-per-day
Plant maximum daily capacity: 800 tons
Average thru-put: 720 tons per day (365 days per year)
Feed system: 2 overhead refuse cranes with ram feeder
Grate design: Von Roll reciprocating
Combustion temperature: 2500 F
Auxiliary fuel: Natural gas
Waste weight reduction: 65%
Annual Greenhouse Gas Production 600,000,000 Pounds CO2
CO2 per MWH 4480 pounds of total CO2 per Megawatt Hour:
         1580 pounds of fossil CO2 / MWh plus,
         2900 pounds of bio CO2 / MWh

Ash handling system: Semi-dry, vibrating pan conveyor
Materials recovery: 10", aggregate, ferrous
Air Quality Control: Type of equipment: Dry scrubbers-Fabric filters-deNOx (2 units)

Energy Production:

Type of energy: Electric power
Steam flow to turbine: 188,000 pph @ 830 psig/825 F
Heat energy produced: 125 megawatts
Average sellable electricity output: 16.1 megawatts (141,000 MWh/year, 8760 hours in a year)
Efficiency: 13%
Cooling system: Air cooled condenser
Customer: Puget Sound Power and Light Inc.

Facts & Figures:

Plant Maximum Capacity: Equals 800 Tons/day,  two 400/ton per day boilers.
Guaranteed capacity: 248,200 Tons/yr., 720 tons/day
Effective maximum capacity: 275,000 Tons/yr
Max capacity reached: 1992, excess hauled to Klickitat County
Electrical output: 26 megawatts maximum - 20 megawatts average - 16 MW sold
Turbine Speed: 3600 rpm producing 60 Hertz (60 cycles/sec)
Pit Dimensions & capacity: 140’ x 50’ x 40'; 40’ back wall; 4800 tons
Receiving floor: 62,000 square ft. or 1.4 acres
Stack: 175’ tall, preformed concrete sections, contains three flues
Fire Temperature: 2500 degrees F
Temp/Velocity of exiting stack gases: 250 degrees F, 4000 ft per minute

Construction involved:

16,415 cubic yards of concrete
198,692 cubic yards soil imported
45,251 feet of pipe
3,248 Tons of structural steel
350,829 feet/66.445 miles of cable
10,740 feet/2.3 miles of cable tray
2,396 field welds
Time to construct: 22 months
First refuse fire: September 6, 1991
Refuse crane: capacity = 9 tons or 6.5 cubic yards; Typical load = 2-3 tons
Computer System: Bailey Network 90
Cost: 110 Million dollars, largest capital project for City of Spokane.
Ownership: City of Spokane.
Debt responsibility: City of Spokane & Spokane County & all municipalities within.

Wheelabrator / Waste Management involvement:

Design, construct, operate and maintain for 20 years at 100% profit margin.

Technology:

Ash Quantity:  65% reduction by weight of original MSW weight.
Ash Disposal: Rabanco Regional Landfill, Klickitat County (near Roosevelt, WA).
Ash Transport: Container capacity 15 tons. Configuration: two containers per load, 30 tons per truck, 8-10 truckloads/day. Intermodal train container, 25-28 ton capacity.
Iron recovery: 2.5% of original weight of MSW. Iron is not recovered with traditional landfilling.
Built for expansion: Extended Conveyors; Big pit; Extra flue in stack; Boiler APC turbine needed
Air Cooled Condenser: Totally dry cooling-6 cells, 150 HP motors
Boiler tube length: Approximately 100 feet, suspended from roof structural steel

Bag Houses:

Bag houses contain 3420 bags (1710 per boiler line).
Filtering bags are made of Gore-Tex fabric.
Continuous Emission Monitors: Read every 15 seconds-02, S02, Nox, Opacity, CO, Temperature
Property Area: 52 Acres

Similar technology:

No Waste-to-Energy sites have been built in the U.S. for the last 15 years. Wheelabrator operates 13 other similar old facilities in the U.S. There are over 500 plants in the world, approximately 136 using the same basic technology. More than 20 equal to or larger than 800 TPD.

Regulatory Agencies:

Spokane Air Pollution Control Authority (SCAPCA)
Washington Department of Ecology (WDOE)
Spokane Regional Health District (SRHD).

BTU values:

Garbage = 4,800/pound
Coal = 12,000/pound
Plastic = 14,000/pound
Tires = 16,000/pound

 

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