Industrial-Scale Demonstration Boiler
Features
Type |
Tampella Power Corporation DS-15 Type D Watertube Boiler |
Rated Capacity |
15,000 lb/h saturated steam at 300 psig (420oF) |
Design Fuel |
Micronized coal |
Thermal Input |
15 to 19 million Btu/hr |
Boiler Auxiliaries |
Forced draft and induced draft fans 15,000 gallon storage tank and 2,000 gallon day-tank Q-Pipe Air Preheater Double pipe heat exchanger - CWSF Preheater Fabric Filter Dust Collector Ceramic Filter |
Diagnostic Tools |
Automated data acquisition system with Viewdac software to log temperatures, pressures, fuel and steam flow rates and flue gas composition
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Coal Storage and Handling Equipment
Coal Micronization System
The industrial-scale preparation facility houses a dry coal micronization circuit to produce the fuel necessary to conduct testing in the Demonstration Boiler. The central coal feed system receives a 2"x0" coal and is composed on a 25 ton coal bin, cage mill, Redler conveyer, 5 tom surge bin and a weight-belt feeder. This central coal feed system delivers minus 0.25" material to the micronized coal circuit shown below.
Features
Rated Capacity |
Nominal 1.0 t/h dry coal |
Design |
26 inch TCS mill which transfers micronized coal directly to the Demonstration Boiler |
Coal-Water Slurry Fuel Preparation Facility
The industrial-scale preparation facility houses a coal-water slurry circuit to produce the fuel necessary to conduct testing in the Demonstration Boiler. The central coal feed system receives a 2"x0 coal and is composed on a 25 ton coal bin, cage mill, Redler conveyer, 5 ton surge bin and a weight-belt feeder. This central coal feed system delivers minus 0.25" material to the coal-water slurry circuit shown below.
Features
Rated Capacity |
Nominal 0.7 to1.0 t/h slurry |
Design |
Single/double stage wet grinding circuit equipped with 4x8 ft wet overflow ball mill, Midwestern 36" screen, Moorehouse Sand Mill, Rotary Drum Vacuum Filter and several slurry mixing tanks with mixer. |
Slurry Storage/ Processing Capacity |
Nominal 3,500 gallons |
Quality Assurance Instrumentation |
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Coal-water slurry fuel can also be formulated from filter cake produced during coal cleaning. The circuit is modified as shown below.
Features
Design |
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Slurry Storage/ Processing Capacity |
Nominal 3,500 gallons |
Ceramic Filter Chamber and Conventional Fabric Filter Baghouse
The ducting from the boiler to the particulate filtration devices and from the devices to the induced draft fan contains 6" ports for access to measure particulate loadings and particle size and to obtain samples for air toxics measurements.
Photograph of Ceramic Filter Chamber and Conventional Fabric Filter Baghouse.
Ceramic Filter Chamber Features
Size |
8,100 ACFM@400oF |
Design |
80 filters, 15" long by 7" in diameter, manufactured by CeraMem Separations, Inc. |
Filter Area |
2,000 sq. ft. |
Face Velocity |
4.0 |
Operating Pressure |
7 to 10" W.C. |
Automatic Pulse-Jet Cleaning |
Compressed air |
Fabric Filter Dust Collector Features
Size |
8,100 ACFM@350oF |
Design |
196 bags, 10' long by 4.5" in diameter, aromatic polyimide fiber of needled felt construction |
Filter Area |
2,400 sq. ft. |
Face Velocity |
3.5 |
Operating Pressure |
6 to 7" W.C. |
Automatic Pulse-Jet Cleaning |
Compressed air |
Additional Features |
Field insulated and lagged carbon steel casing with a hinged modular access/hatch cover, OSHA approved platforms and ladders, automatic controls and an indicator panel |
Sorbent Duct Injection System
The Demonstration Boiler is equipped with a duct injection system for SO2 reduction. The sorbent is injected into the ducting upstream of the particulate removal devices.
Features
Design |
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