Pugmill Conditioner for High Calcium Fly Ash

Pugmill Conditioner
for high calcium fly ash
Options
Paddles
Ceramic tipped UHMW encased steel paddles
AR tipped UHMW encased steel paddles
Discharge Chute
One section – fixed carbon steel with optional UHMW liner
Two sections – Upper fixed section of carbon steel (lined with UHMW as option)
and a lower section of flexible material
Ash Feed ValveReplace v-orifice knifegate valve with rotary feeder
PLC-Based Control System Analog data input from the field instruments (water and/or mass flow meters)
Touch screen PLC interface for operator input and control Pendant control station at the truck level
Properly conditioning dry fly ash for transportation and disposal can be a concern for plants
with high calcium ash such as those burning
Powder River Basin (PRB) coal. Allen-Sherman-Hoff’s latest pugmill design addresses the
following high CaO issues:
• High concentration of reactive calcium
compounds (CaO) in the fly ash
• Dusting and/or buildup of hard deposits on the pugmill internals and mixing
chamber
• Improper water distribution and mixing
Our latest pugmill properly conditions the
high CaO ash for transport in an open top
vehicle.
Top Lid
Allen-Sherman-Hoff® is a Diamond Power International, Inc. division.
Diamond Power International, Inc. is the leading name in the design, manufacture and service of ash-handling and boilercleaning systems, knowledge-based control systems, and boiler diagnostic, sensor and imaging technology. For more
information, visit www.diamondpower.com.
For over a century: Trusted for experience. Preferred for performance.
Allen-Sherman-Hoff
· 185 Great Valley Parkway ·
Malvern, PA 19355 · Phone: (888) ASH-PARTS · Fax: (610) 648-8679
The information contained herein is solely for informational purposes and is not offered, nor should be construed, as a warranty or contractual
obligation. Diamond Power reserves the right to make design or material changes without notice.
Inlet Cover
Inspection Door
Outlet Access Door
©2006 Diamond Power International, Inc.
www.a-s-h.com
All rights reserved.
ASH-9737-0305-00
The Allen-Sherman-Hoff ® upgraded pugmill — designed
specifically for high calcium ash applications — enables
the continuous silo unloading of fly ash while minimizing
fugitive dust.
Features
•Precisely controlled and evenly distributed moisture addition
•Efficient mixing and continuous throughput using proven paddle
design
•Ultra High Molecular Weight (UHMW) Polyethylene coating on
the mixing chamber and paddles and polymer coating material
on shafts to reduce deposit formation
•Hinged, counterbalanced top lid with inspection door and hinged
inlet and outlet doors to improve access
•Externally mounted nozzles and water supply manifolds for improved access and maintenance
Pugmill Conditioner
Superior Wetting System Design
Dry Fly Ash
Diagram & Specifications
Water Spray
Components
Two shafts coated with a polymer material, UHMW lined trough, UHMW coated
paddles, flexible isolation curtain, externally mounted spray nozzles
Housing
Four hinged doors with safety latches: counter-weighted top lid, inlet cover,
inspection door, outlet access door
Controls
PLC based control system
Size
6600
11000
Conditioning Capacity
6,600 cubic feet (187 cubic meters)
11,000 cubic feet (312 cubic meters)
Approx. 150 TPH @ 45 lb per cu ft ash density
Approx. 250 TPH @
45 lb per cu ft ash density
Drive Size
50 HP
60 HP
Length 7 ft - 6 in (2286 mm)
8 ft - 6 in (2591 mm)
Height
(not including 6” concrete piers)
4 ft - 4 5/16 in (1328 mm)
5 ft - 8 9/16 in (1741 mm)
Weight
8,500 lbs (3856 kg)
11,450 lbs (5194 kg)
Inlet Section
Mixing Area
Isolation Curtain
Conditioned Ash
The key to obtaining the right ash consistency for transport is the
Allen-Sherman-Hoff® pugmill’s wetting system technology.
Optimal mix of water
The amount of water supplied to the spray nozzles is critical, so it is controlled by a flow regulating valve for finite
adjustment of water supplied to the vessel. The amount of water can be adjusted in relation to the ash feed.
Throughout the conditioning process, the water flow rate into the vessel can be monitored by viewing a display on
a digital readout from an in-line vortex flow meter. The wetting system includes externally mounted spray nozzles
that inject a fine mist of precisely controlled water into the mixing area of the pugmill. This proven technology also
has an alarm input safeguard to prevent inadequate water supply pressure.
Overlapping paddle configuration minimizes dust and ash buildup
Counter-rotating mixing paddles, which are coated with Ultra High Molecular Weight (UHMW) Polyethylene, ensure
the proper mix for transport, while reducing the tendency for material buildup on the paddles.
Isolation curtain to contain fugitive dust
In addition to the water control, an isolation curtain compartmentalizes the inlet section from the mixing area to contain
fugitive dust in the mixing area.
Unique nozzle arrangement
Our pugmill’s unique nozzle arrangement allows for
proper water distribution inside the mixing chamber for
conditioning the ash. The spray system’s nozzles can
be replaced without opening the lid.
(dry fly ash per hour)
(inlet to outlet)
(Pugmill w/drive)
Water Supply
120 GPM maximum
168 GPM maximum
@ 60 psig minimum supply pressure @ 60 psig minimum supply pressure
6600 & 11000 CFH Pugmill Design
Pugmill Conditioner
Superior Wetting System Design
Dry Fly Ash
Diagram & Specifications
Water Spray
Components
Two shafts coated with a polymer material, UHMW lined trough, UHMW coated
paddles, flexible isolation curtain, externally mounted spray nozzles
Housing
Four hinged doors with safety latches: counter-weighted top lid, inlet cover,
inspection door, outlet access door
Controls
PLC based control system
Size
6600
11000
Conditioning Capacity
6,600 cubic feet (187 cubic meters)
11,000 cubic feet (312 cubic meters)
Approx. 150 TPH @ 45 lb per cu ft ash density
Approx. 250 TPH @
45 lb per cu ft ash density
Drive Size
50 HP
60 HP
Length 7 ft - 6 in (2286 mm)
8 ft - 6 in (2591 mm)
Height
(not including 6” concrete piers)
4 ft - 4 5/16 in (1328 mm)
5 ft - 8 9/16 in (1741 mm)
Weight
8,500 lbs (3856 kg)
11,450 lbs (5194 kg)
Inlet Section
Mixing Area
Isolation Curtain
Conditioned Ash
The key to obtaining the right ash consistency for transport is the
Allen-Sherman-Hoff® pugmill’s wetting system technology.
Optimal mix of water
The amount of water supplied to the spray nozzles is critical, so it is controlled by a flow regulating valve for finite
adjustment of water supplied to the vessel. The amount of water can be adjusted in relation to the ash feed.
Throughout the conditioning process, the water flow rate into the vessel can be monitored by viewing a display on
a digital readout from an in-line vortex flow meter. The wetting system includes externally mounted spray nozzles
that inject a fine mist of precisely controlled water into the mixing area of the pugmill. This proven technology also
has an alarm input safeguard to prevent inadequate water supply pressure.
Overlapping paddle configuration minimizes dust and ash buildup
Counter-rotating mixing paddles, which are coated with Ultra High Molecular Weight (UHMW) Polyethylene, ensure
the proper mix for transport, while reducing the tendency for material buildup on the paddles.
Isolation curtain to contain fugitive dust
In addition to the water control, an isolation curtain compartmentalizes the inlet section from the mixing area to contain
fugitive dust in the mixing area.
Unique nozzle arrangement
Our pugmill’s unique nozzle arrangement allows for
proper water distribution inside the mixing chamber for
conditioning the ash. The spray system’s nozzles can
be replaced without opening the lid.
(dry fly ash per hour)
(inlet to outlet)
(Pugmill w/drive)
Water Supply
120 GPM maximum
168 GPM maximum
@ 60 psig minimum supply pressure @ 60 psig minimum supply pressure
6600 & 11000 CFH Pugmill Design
Pugmill Conditioner
for high calcium fly ash
Options
Paddles
Ceramic tipped UHMW encased steel paddles
AR tipped UHMW encased steel paddles
Discharge Chute
One section – fixed carbon steel with optional UHMW liner
Two sections – Upper fixed section of carbon steel (lined with UHMW as option)
and a lower section of flexible material
Ash Feed ValveReplace v-orifice knifegate valve with rotary feeder
PLC-Based Control System Analog data input from the field instruments (water and/or mass flow meters)
Touch screen PLC interface for operator input and control Pendant control station at the truck level
Properly conditioning dry fly ash for transportation and disposal can be a concern for plants
with high calcium ash such as those burning
Powder River Basin (PRB) coal. Allen-Sherman-Hoff’s latest pugmill design addresses the
following high CaO issues:
• High concentration of reactive calcium
compounds (CaO) in the fly ash
• Dusting and/or buildup of hard deposits on the pugmill internals and mixing
chamber
• Improper water distribution and mixing
Our latest pugmill properly conditions the
high CaO ash for transport in an open top
vehicle.
Top Lid
Allen-Sherman-Hoff® is a Diamond Power International, Inc. division.
Diamond Power International, Inc. is the leading name in the design, manufacture and service of ash-handling and boilercleaning systems, knowledge-based control systems, and boiler diagnostic, sensor and imaging technology. For more
information, visit www.diamondpower.com.
For over a century: Trusted for experience. Preferred for performance.
Allen-Sherman-Hoff
·
457 Creamery Way
·
Exton, PA 19341
·
Phone: (888) ASH-PARTS
·
Fax: (484) 875-2080
The information contained herein is solely for informational purposes and is not offered, nor should be construed, as a warranty or contractual
obligation. Diamond Power reserves the right to make design or material changes without notice.
Inlet Cover
Inspection Door
Outlet Access Door
©2006 Diamond Power International, Inc.
www.a-s-h.com
All rights reserved.
ASH-9737-0305-00
The Allen-Sherman-Hoff ® upgraded pugmill — designed
specifically for high calcium ash applications — enables
the continuous silo unloading of fly ash while minimizing
fugitive dust.
Features
•Precisely controlled and evenly distributed moisture addition
•Efficient mixing and continuous throughput using proven paddle
design
•Ultra High Molecular Weight (UHMW) Polyethylene coating on
the mixing chamber and paddles and polymer coating material
on shafts to reduce deposit formation
•Hinged, counterbalanced top lid with inspection door and hinged
inlet and outlet doors to improve access
•Externally mounted nozzles and water supply manifolds for improved access and maintenance