Method for pneumatically conveying plastic pellets
AssigneeCoperion GmbH
InventorsBernhard Stark, Michael Duerr, Thomas Vögele, Christian Dikreuter, Christian Toni
Life of this patent
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Abstract
When performing a method for pneumatically conveying plastic pellets, the plastic pellets are conveyed, by means of a carrier gas, through a conveyor line from a feed point to a destination with a liquid being added thereto, wherein the quantity of liquid added to the plastic pellets and/or the carrier gas is such that during conveying, the carrier gas is oversaturated with the liquid at least in sections of the conveyor line in such a way that a Froude number defining the conveying conditions in the conveyor line is smaller than 45 at any point along the conveyor line.
Claims16
A method for pneumatically conveying plastic pellets, the method comprising the method steps:
- conveying plastic pellets via a carrier gas from a feed point to a destination through a conveyor line, the plastic pellets having a particle diameter of 2 mm to 5 mm, which is equivalent to that of a sphere having a same volume;
- adding a liquid to at least one of the carrier gas and the plastic pellets, wherein a quantity of the liquid added is such that during conveying, the carrier gas is oversaturated with the liquid at least in sections of the conveyor line;
- providing a Froude number defining conveying conditions in the conveyor line, the Froude number being less than 45 at any point along the conveyor line, wherein the liquid added evaporates only incompletely when being added, wherein a non-evaporated part of the liquid continues to evaporate when the liquid is conveyed along the conveyor line.
A method for pneumatically conveying plastic pellets, the method comprising the method steps:
- conveying plastic pellets via a carrier gas from a feed point to a destination through a conveyor line;
- adding a liquid to at least one of the carrier gas and the plastic pellets, wherein a quantity of the liquid added is such that during conveying, the carrier gas is oversaturated with the liquid at least in sections of the conveyor line;
- providing a Froude number defining conveying conditions in the conveyor line, the Froude number being less than 45 at any point along the conveyor line;
- providing a humidity content of the plastic pellets of at most 10%, wherein the humidity content is defined as a ratio of a mass of the liquid added in relation to a mass of the plastic pellets.
Dependencies are inferred from the claim text.