Nelson TWIG handleiding
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5.1.8 Industrial coal site dust suppression
The TD200 controller TWIG system works well for valves that
operate dust control gun sprinklers. Some systems have long
communication distance requirements and coal pile obstructions.
The TD200 signal is to operate the 800 Series valves at each gun.
The layout shown here is for two parallel coal stock piles. The
piles are typically made utilizing a stacker loader that operates
between the piles. Each valve is a TWIG location. Using the plan
layout, it is best to have three chains made by having TWIG-
Repeaters located at number 1, 8 and 15. Three simple chains
will work well here.
The pile length and shapes are ever changing. There is typically
a lot of equipment activity at these sites and many obstructions.
Sprinklers and valves should not be spaced at the maximum limit.
Be conservative in spacing because dust in the air can weaken
the signals.
When the pile size has been reduced then the unused gun
positions can be easily added or removed from the TWIG radio
network and removed from the watering schedule. The antennas
at the coal sites are generally elevated high above the maximum
height of the coal stack.
These sites use both full circle and part circle sprinklers which have different watering times. The
remedy is an easy adjustment to the TD200 controller program. Also full circle sprinkler valves can
easily be grouped into sets so that the right amount of watering time is set for full circle guns because
these must operate twice as long as the time for the half circle valves. The main consideration is to
get adequate water coverage quickly to suppress wind blow of the dust from off the top of the piles.
Owners of these systems like to run very short rapid cycles. A good system will be exible using no
more sprinklers than essential but providing good water coverage.
Wireless dust control
needs to be exible
because the coal piles
change shape frequently.
Figure 5.7
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Productinformatie
| Merk | Nelson |
| Model | TWIG |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 23106 MB |