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Design Guidelines
Dust
Characterization
The number of
nozzles to be used at each dust treatment point is a factor of how
much dust is being created. High volumes of finely crushed
aggregate with a low moisture content create the most dust while
materials like recycled paper do not generate as many particles of
dust at any given volume.
Nozzle
Density
The number of
nozzles in operation at a dust treatment point can be increased or
decreased by spacing the nozzles more closely together or wider
apart during the installation process. As installing the
“push on” nozzles is a very simple matter, it is good
practice to start the installation using a wider than anticipated
nozzle spacing. After operating the system for the first time, dust
reduction rates can be observed, if sufficient dust suppression is
not occurring, then additional “push on” nozzles can be
spliced in very easily. Conversely if there are too many nozzles at
a treatment point, nozzles can be replaced with nozzle
plugs.
Nozzle
Position
The effective
throw distance of an atomization nozzle is 2 to 4 feet, however,
environmental factors such as wind or air flow created by the
conveyed or processed material must be taken into consideration.
The principle is to mix the atomized water droplets with the dust
or to install the nozzles to form a curtain of atomized water to
prevent dust particles from escaping. The atomization nozzles need
to be positioned back from the process material at a suitable
distance to allow the atomized water droplet to effectively contact
and mix with the dust, but not so far as to allow air flow to blow
the atomized water away or so close that the water does not have
time to atomize or so close that the atomization nozzle could
become submerged or damaged by the process material.
The atomization nozzles can be secured in position using tubing
clamps (part# LHSC0002), in which case the clamps hold the nozzle
body and are then screwed or bolted to a suitable flat surface.
Optionally, where no surface exists to use hose clamps, stainless
steel hanger cable and turnbuckles may be used (parts # LSAC0001
and part# LSCT0001). The stainless steel cable is strained between
two anchor points and tightened using the turnbuckle. The manifold
tube and atomization nozzles are then zip tied to the
cable.
Design
Information - Please click on the image below to
enlarge
Design
Illustrations
Screeners
Complex
processing machinery can be retrofitted as shown.
The droplets produced by the system are very fine, there is no
wetting of the process material to cause clogging
problems.
Crushers
The mid pressure
mist system can be designed to operate in very aggressive
environments.
The flexible and adaptive features of the system permit rapid and
simple installation on complex equipment.
Belt
Drop Off Points
Lines and
Nozzles are arranged to form a wall or curtain of fog at belt drop
off points.
Dust trying to pass through will be
contained.
Belt
Load Points
At belt load
points, dust will travel sideways when to convey material hits the
belt.
A curtain of fog encloses the dust on all four sides. Dust trying
to escape will have to past through the fog where it will be
contained and suppressed
Hopper
Feed Points
Lines and
nozzles are arranged to form a cover at hopper fill points.
As the hopper is filled, dust travelling upwards will be
contained.
Each treatment zone within the fog system can be automated to
operate as required.
Hopper
Exit Points
Lines and
nozzles are arranged to form a curtain at the hopper exit
point.
Dust trying to pass through the fog will be suppressed and
contained