What do I have to take into consideration with regard to the filling quantity?
For certain storage systems, the manufacturer's specifications with regard to the filling quantity must be read thoroughly as, in many cases, the provided calculations are difficult to understand. You might want to check the calculation yourself. Residual quantities must be considered as these have a negative impact on effective room utilisation.
What fines are generated during the storage of wood pellets, and how?
> The fines, the length of the pellets and abrasion determine the pellet quality.
> Incorrect filling at excessive pressure, or generally poor pellet quality may result faults in pellet transport and in the boiler.
> Incorrect installation of the filling line or 90° bends might also reduce the pellet quality during filling.
> Filling without an impact wall in the storage room might literally destroy the pellets
> In some extraction systems, the return air is directed back into the store.
What is the difference between extraction from the top and from the bottom?
Extraction from the bottom:
Pellets flow in the core flow to the point of discharge, which prevents segregation. The pellets are discharged regularly and evenly together with the fines. Depending on the design, the outlet is freely accessible.
Extraction from the top:
(mole extraction/suction lance) Mole extraction requires a higher operation effort as the pile of pellets must be moved to the side while filling.
Is there any help if the fuel runs out?
If the day container is accessible it is filled with sacks of material.
A manual filling nozzle can be installed for flexible silos. In this case, pellets can be filled in manually.
How can I check the filling level?
In white textile silos, the remaining stored quantity can easily be checked visually as the filling level is visible through the material. In cooperation with A.B.S., DELOX has developed a capacitive measuring system for silo filling levels, which can be installed in a flexible silo, for example. The filling level can easily be read from an externally mounted visualisation device.
How are the pellets removed from the flexible silo, what role does the boiler play?
Depending on the boiler type and the conveyor system, the pellets are removed by means of a spiral, screw or suction conveyor. A.B.S. takes over the technical coordination so that almost all heating boilers can be combined with an A.B.S. silo. Manual extraction using a manual outlet is possible at any time.
Up to how many tons of pellets can I store in a flexible silo?
A.B.S. silos have a capacity for up to 30 t pellets.
Normally, up to 15 t may be stored in the room of the heating system. A distance of one metre between the silo and the boiler must be observed. However, this value also depends on the heating output of the system (<150 kW). Please consult the respective firing ordinance applicable in your country and federal state.
Why are flexible silos equipped with only one filling nozzle?
During filling, the dust remains in the silo. The conveying air escapes through the lid fabric on the top. An additional ventilation outlet is only required for rooms that do not have a ventilation opening.
Why do some flexible silos have metal threads in the fabric?
For a distance of a metal thread grid that is smaller or equal 10 mm, the fabric fulfils the requirement of being permanently electrically conductive. The surface resistance will then not exceed 109 Ω. |
Wood pellets are delivered by a silo car and are blown into the pellet store by a filling hose. 
Wood pellets can be stored directly in the dry cellar room as they do not pose an environmental hazard, unlike heating oil.
The storage system that a boiler operator opts for mainly depends on the space situation, like cellar, garage, attic, etc.
Silo size and silo height
The conveyor system transports the pellets from the store room to the heating boiler. Three different systems have established themselves in this regard:
