Pneumatic conveyors F-PVS, D-PVS

The systems are available in various sizes, providing loading and venting devices and are complete with control panel and programmable parameters and sequences of batch cycles, operator interface and remote from a control room.

It's easy to say dense phase. Higher pressure, low speeds. Thus the conveyed material causes less wear to the pipes when it is hard and abrasive like sand and bottom ash, or does not degrade when it is fragile and delicate, like sugar or rice.

Actually designing a dense phase pneumatic conveying means a correct and thorough knowledge of the matter and the application.

For example, the material, the temperatures. A poorly flowing product can not always travel as it were a "cap" in a pipe. On the other hand, a material "too" smooth and permeable as the granule require very different control parameters.

In particular, in the case of materials that tend to pack, form bridges and flow with difficulty, it is necessary to balance the amount of air released in the tank, and preferring the outlet and the cone inlets respect to the power supply towards the top. Hence the possibility of fluidize the material in a controlled relation respect to the applied pressure.

In Rosada ILS we call main flow that called to the function of pushing the material into the line. It is divided (and adjusted) in tank flow, that from above pushes the material into the line, and in-line flow that act once discharge is completed and keeps the push in the pipe. Then we define the fluidization flow, in turn divided into fluidization jets acting on the cone of unloading and, in the models F-PVS, fluidized bottom that avoids clogging in correspondence of the placing in line.

The result is an electro-pneumatic system with the maximum range of adjustment in order to optimize both the pneumatic conveying and energy consumption.

To get a lower speed and lower operating conveying pressure, consequently lower consumption, a dense phase pneumatic Conveying system can be integrated with an in-line support system.

However we need to clarify the peculiarities of the solution and the benefits it can bring because this solution is often installed unnecessarily, with an increase of investment and maintenance costs. Here we motivate its use.

First of all we clarify that assist a line of pneumatic conveying does not involve a higher energy consumption but, rather, this is optimized by means of a diversified distribution of fluid supply. This technology allows you to stop conveying with the material inside the line. This might be necessary in order to avoid you to place a cycle of pipeline emptying and purigng between a product batch and the other, which occurs at high speeds and therefore harmful in the case of fragile products, which would spoil, or abrasive materials, which would cause excessive wear. Except in cases of long distances or very high flow rates of abrasive or very fragile products , there are no significant advantages in implementing am in line support with highly porous granules, on the other hand you should not rely on it thinking it's the only way to solve the problems of fluidisation and pneumatic conveying of a powder.

Our technology with Air Dynamic Activator is based on the concept of assistance to the pneumatic conveying in a manner proportional to the dynamic variation of the pressure along the line. We use a compressed air line at the service pressure (therefore of limited size), whose pressure of injection adapts itself according to the pressure in each specific section of the conveying line, decreasing gradually towards the point of destination. This solution allows to push the material only when really necessary for optimization purposes for the conveying and the fluid consumption (air, nitrogen, etc..), with the maximum energy savings.