Working with bulk materials stored in silos or hoppers of more or less large dimensions, the problem often arises as to facilitate discharge of the material to the outlet, for example because of packings due to the relative humidity or else the specific characteristics of the material.
With P-HPF project we created a component that can be easily configured to meet the most varied problems of discharge from the silos.
The basic concept of component P-HPF is the ability to introduce air into the silo with pressures and high "instantaneous" flow rate, achieving effects far better than a conventional fluidization system.
We obtained this aim by providing a device that allows, at the instantaneous opening of the piston, to liberate a vigorous "shock wave" that penetrates widely in the mass to fluidise, disrupt with a shock wave bridge breaker or blend before discharge.
The involved variables are therefore the operating pressure, the pressure and duration of the pulse, the air flow rate and the shape of the opening piston. Combining them, we solve the different needs related to the outlet of bulk material from a silo.
Manufacture in various materials to suit applications in high temperature, in the food and pharmaceutical industry, in ATEX environments, enhance the versatility of P-HPF.
We homogenize bulk materials inside a silo
Using a P HPF Pulse - High Pressure Fluidizer system, we realize an important application that solves the problem of the accumulation of different bulk materials that tend to stratify in a non homogeneous way inside the silo, for example because loaded separately in different moments of the operation.
Our solution is based on a special outlet cone at the silo bottom with a number of P-HPF, powered by a compressed air distribution system operating according to suitable sequences. The P-HPF cone creates a directional flow of compressed air inside the silo, which moves from the bottom of the cone upwards and towards the central axis of the storage silo.
This impulsive movement of air allows the materials inside to be raised as the jet of a fountain, then fell towards outwards, obtaining a blending effect that ultimately make the contents of the silo homogeneous.
Among the applications well known and important include the dry ingredients food, that can be mixed pneumatically thus avoiding the use of a mechanical mixer and allowing the insertion of the liquid already in the phase of reaction or dissolution. As well as the possibility of making products homogeneous, for example powder more granules, which stratify in the silo due to gravity and the broad particle size distribution.
P-HPF. A cannon against bridges, rat holes, clogged storage
P-HPF provides a Shocker version which acts as an air cannon on a zone of action that is not concentrated, such as not to bore the clogged material in the silo but break it up.
The most frequent configurations involve the use of shock wave diffusers with high power output, flanged to a mask welded to the silos. The compressed air supply is generally served by a tank of compressed air for each single component or by an appropriate number of rings of air distribution to multiple utilities, to obtain an effective effect of "shot" of the flow.
Rosada ILS defines size and sequences of the shocker to solve typical problems such as the formation of bridges of material that clings to the inclined wall of the silo, or the formation of holes to the outlet that prevent the discharge. We provide declogging systems complete with control panel.
Traditional fluidization systems
One of the simplest systems for aided unloading from silos, Rosada ILS offers vibrating bottoms or fluidizing pad systems.
In particular the pads of fluidization operate with a low flow of air at low pressure, creating a sheet of air between the silo wall and the stored material, which aids the detachment of bulk from the wall and then consequent unloading.
We design systems with the most suitable fluidizers for the specific requirements, defining the number of input points, the flow rate and the air pressure, optimizing energy consumption.
