Trieur
The trieur (also: cell separator ) is a device for cleaning grain . All grains that differ in length from the main material can be picked out in this way.
There are two different design principles:
- the jacket door ( most commonly found in grain mills )
- the window door
Depending on the type of goods to be read out, a distinction is made between round grain gauges , long grain gauges and readers (these have the task of separating the goods that have been read out again and more finely).
commitment
The trieur is used for cleaning seeds and edible grain (in the mill ). The trieur separates according to grain length . In the round grain chain, short, round (e.g. weeds ) or broken grains are sorted out. Long grain grains are selected that are longer (e.g. oats ) than the main product (e.g. wheat ).
In modern mills, “triple batteries” are often used, in which round grain, long grain separators and subsequent readers are connected in series in order to achieve the sharpest possible separation of the main material and impurities.
Coat door
The functional principle of the jacket structure is described here for round grain selection. The door consists of a horizontal rotating cylinder made of sheet metal with many small embossed "cells". The grain is placed inside on one side of the cylinder. The "good" = long grains tip slightly out of the bowls when turned and slide slowly through the cylinder to the other side. Short grains stay longer in the bowls during rotation and therefore only fall further up out of the cylinder into a centrally arranged trough. They are caught there separately. The "Animated Function Description" under web links shows this very nicely. The speed and the bowl inclination can be adjusted depending on the level of contamination.
Worm gear
The so-called Schneckentrieur (also Spiraltrieur , Wendeltrieur or spiral chute is called) is not a Trieur in the sense described above, but a helical chute on which the products according to different centrifugal force to be separated (due to its shape and surface texture). The rounder the seeds are, the further they roll outwards in a sheet metal that is bent in a helical shape around an axis, so that round wound seeds roll on the outside, while broken grains slide inside the spiral door. For this reason, screw centrifuges do not need an electrical connection, but only work with gravity and centrifugal force .
Web links
literature
- Erling, Peter (ed.), Handbook of flour and peeling mills , 2nd edition, Bergen / Dumme 2004, chap. E.2.5, ISBN 3-86037-230-0