Pneumatic
Piston Vibrators
VS.
Air Blasters
in Coal Fired Power Plants |
NAVCO®
NEWS
|
Pneumatic
Piston Vibrator |
|
Air
Blaster/Cannon |
| Effectiveness... |
|
|
| NAVCO®
BH vibrators produce energy that is transmitted efficiently through the
bunker wall and into the bulk material. Through the principles of conservation
of momentum and energy, energy produced by NAVCO®
BH vibrators propagates through the hopper structure affecting material
over a large area of influence. NAVCO®
BH vibrators effectively reduce sliding wall friction and material strength
through out the bunker. |
|
Air Blasters direct
a high pressure burst of air into the bunker. The burst dissipates quickly
and is not transmitted efficiently throughout the bunker. Air Blasters have
a limited area of influence, especially with difficult wet or frozen coal. |
| Installation... |
|
|
| NAVCO®
BH vibrators are simple to install. The applicable mounting plate simply
welds to the bunker wall. The BH vibrator is then bolted to the mounting
plate. Cutting or drilling of the bunker wall does not occur, therefore
BH mounting does not adversely affect sliding friction characteristics.
Typical
channel mount for round hoppers:
|
|
Air blasters
require complex and expensive installation. The bunker wall must be drilled
or cut to accommodate the blaster nozzle. This adversely affects sliding
friction characteristics in the installation area, impeding material flow.
Additional access holes must be cut to attach the nozzle inside the bunker.
The bunker must be emptied and cleaned prior to installation – adding
to the cost and downtime. |
| Safety... |
|
|
NAVCO®
BH vibrators have excellent clean-out characteristics, effectively removing
stagnant pockets of coal, drastically reducing the need for burndown cleanouts
and reducing potential for spontaneous combustion. Additionally, the external
installation of the BH vibrator does not introduce additional air into
the bunker.
|
|
Air Blasters principle
of operation is to introduce a blast of high pressure air into the bunker.
In a bunker full of combustible material (coal), blasting air into the bunker
increases the potential for spontaneous combustion. |
The
Big BH 8 for large coal bunkers
(works well on frozen coal too)
NAVCO®
also offers a complete line
of options and accessories
for the BH model vibrator – including teflon coating, tapped exhaust,
timers, solenoid valves and other control systems to operate the vibrators as
the process requires, thus increasing efficiency and reducing utility costs.
NAVCO®
recommends an integrated system using
a coal flow indicator or mill demand to initiate vibrator action. An alarm can
be sent to the control room to indicate flow and / or vibrator status. NAVCO
will provide complete system recommendations upon request.
NAVCO®
manufactures many other quality
products for coal-fired power plants – Electric Vibrators,
Railcar Unloading Systems, Vibrators for Fly Ash
Handling, Electrostatic
Precipitator Rappers, and Vibrators for Coal Chutes.
Talk to the Applied Vibration Experts
Powered by LiveChatNow!
HOME