Solid material comminution or disintegration – Processes – Miscellaneous
Patent
1998-10-23
2000-01-11
Rosenbaum, Mark
Solid material comminution or disintegration
Processes
Miscellaneous
241 37, B02C 2500
Patent
active
060126612
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a method for automatically controlling grinding within a milling plant, and a plant for implementing the method.
DESCRIPTION OF THE PRIOR ART
The current requirements of the milling market require substantially the use of many types of grains and a large number of qualitatively constant types of flour, both because the consumer requires many varieties of bread and because the production of deep-frozen products and sweets requires an increasingly larger number of special flours.
For this reason the type of grain mixture has to be frequently changed within the milling plant, resulting in a specialized personnel requirement for optimizing plant control.
An object of the invention is to provide a method which enables grinding control in a milling plant to be optimized without requiring the use of specialized personnel or at least reducing the time for which such personnel is used.
BRIEF SUMMARY OF THE INVENTION
This object and further ones are attained according to the invention through a method for automatically controlling grinding within a milling plant comprising a plurality of grinding stations, comprising the steps of: sifting of a sample, previously programmed standard values, and of the deviation from these values.
To carry out the method the invention foresees a plant for implementing the method claimed, comprising: communication with a single duct by switching a flap provided at their juncture point, which communicate respectively with a first balance and with a second balance, the upper unit communicating only with the first balance, the lower unit communicating only with the second balance, and the intermediate units communicating with said first or second balance by programming, percentage of the contents of both balances with previously memorized values for that type of grinding, and on the basis of the deviation varies the gap between the rolls of the grinding station.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the present invention is described in detail hereinafter with reference to the accompanying drawings, in which:
FIG. 1 is a block diagram of the plant for implementing the method of the invention; and
FIG. 2 shows the plant section relative to the sifting station.
DESCRIPTION OF PREFERRED EMBODIMENTS
As can be seen from the figures, the method of the invention uses a plant comprising a plurality of grinding stations 2 each of which comprises a pair of grinding rolls 4 provided with devices 5 for adjusting the passage gap. This adjustment system is known and therefore does not form part of the invention.
At the exit of each station 2 there is provided a duct 6 comprising a deviator flap 8 which connects it to a duct 9 operating under vacuum and common to all the ducts 6.
The duct 9 is connected to a cyclone 10 provided lowerly with a metering device of adjustable throughput feeding a single-casing sifter 14 provided with devices (not shown on the drawings) which impress on it an oscillatory movement in a horizontal plane.
The sifter 14 comprises substantially three sets of superposed sieves 16, 18, 20 of different grades with their free area decreasing from the top downwards.
Each set of sieves 16, 18, 20 is also provided with a duct for discharging rejects to a weighing machine 22 comprising two balances 24, 26, the first balance 24 forming the rejects collector vessel and the second balance 26 forming the collector vessel for the material which passes through.
Specifically: the balance 24 containing the rejects, 30 provided with a deviator flap 32 which connects it to two ducts 34, 36 connected respectively to the balance containing the rejects and the balance containing the material which has passed through, provided with a deviator flap 40 which connects it to two ducts 42, 44 connected respectively to the balance containing the rejects and the balance containing the material which has passed through.
In a position below the lowest sieve 20 there is provided a duct 46 connected to the balance 26 containing t
REFERENCES:
patent: 3716196 (1973-02-01), Motek et al.
patent: 4881689 (1989-11-01), Lippuner et al.
patent: 5407138 (1995-04-01), Graenicher et al.
Braibanti Golfetto S.p.A.
Rosenbaum Mark
LandOfFree
Method for automatically controlling grinding within a milling p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for automatically controlling grinding within a milling p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for automatically controlling grinding within a milling p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1456093