eta 13180 LP-D, Installation Manual

Page: 77 / 88

Pellet store Tilted floor
77
Only explosion-proof electrical installations
DANGER!
No electrical equipment such as switches, lights,
junction boxes, etc. may be present in the pellet
store.

Unavoidable installations must be airtight and
moisture-proof to protect against explosions, and
in the flight path of pellets they must be protected
against damage. Existing junction boxes that
cannot be installed elsewhere should at least be
filled in with foam to seal all exposed live parts.
13.6 Tilted floor
A tilted floor is needed
The pellet store must have a floor with 40° tilt to ensure
that all pellets in the store can be extracted. This
applies for systems with conveyor screws as well as
for suction heads.
Construction of tilted floor for pellet store
For the tilted floor, three-ply concrete formwork panels
27 mm thick have proven effective. Unplaned wooden
boards 25 mm thick with a smooth plastic-laminated
surface can also be used.
The tilted floor should be flush with the enclosing
walls so that no pellets can fall into the empty
space. However, the support frame itself may not lean
against the walls since they may not have the strength
to resist the forces involved.
Fig. 13-7: Tilted floor design for discharge screw
1 Formwork panel
2 Filling nozzle
3 Back air nozzle
4 Support span