The invention relates to a method according to the preamble of
Claim 1 and to a system according to the preamble of claim 4.
of any kind must first of a thorough after its delivery
Be subjected to cleaning. This generally happens with one
a whole range of different mechanical sorting machines, such as
Stone readers, wind sifters, sieves, trieurs, magnetic separators
etc. However, it has already been suggested, all of these
mechanical sorting machines or a part thereof, by at least
to replace an optical sorter, as shown
has, besides a reduction in space and investment costs, too
a reduction harmful
Germs on the surfaces
and thus to a longer one
However, brewing cereals have special requirements. Because the
relatively long soft process, over
led many hours
It brings, that on the surface of grains still adhering germs
also optimal conditions for propagation are given. This germ multiplication
considering the upcoming wastewater disposal
In the GB 1285056 A
is a malting process described in the outer Scha len len particular barley grains in the amount of up to 10% of the grain weight to be removed by an abrasive treatment to achieve a faster malting and to obtain a higher extract. However, a large part of the husks is lost.
is another method of scouring grain, which too
Flour, haze and semolina are to be ground. Also this procedure
is the distance from the outside
Core shells in the range of 0.2-2%
based on the weight of the grain. The grains are in a scrubber
and between rasp surfaces of a
Scrubbed rotor and scouring sections of a scouring coat.
Invention is therefore the object of the moisture absorption
of cereal grains
This is achieved with the features of claim 1.
gentle rubbing leads
to a load on the surface layers
of cereal grains
and thus to a faster moisture absorption. But this brings
It goes without saying that in practice the process of switching essential
becomes. But this brings the inventive method a double
Profit, because on the one hand, the costs of wastewater disposal
reduces, on the other hand, but also increases the productivity of the process.
in itself a wet scrubbing would come into question, for example by the
Cereals before or during
scrubbing, as known for other purposes
Dry scrubbing is better, as it increases the risk of carry-over
is reduced by germs. In addition, the removal of the chipped
Dirt particles in this way easier.
Scrubbing needs to be carried out
of the inventive
Process certainly not operated with high energy consumption
rather, a gentle treatment is indicated.
Annex therefore has the features of claim 3.
Details of the invention will become apparent from the following
Description of an embodiment schematically illustrated in the drawing.
The sole figure of the drawing shows a schematic of an embodiment
The drawing is purely visual through four only indicated elevators 2 to 5 divided into sections. In place of the elevators 2 to 5 Of course, any other suitable means of transport can be used. For the delivered grain, especially barley, is on the left a group of incoming silos 1 intended. In a pre-cleaning area 6 between the elevators 2 and 3 Treatment steps are carried out to remove coarse and fine foreign matter. The treatment steps of a first cleaning are in one, between the elevators 3 and 4 as well as between the elevators 4 and 5 arranged, first cleaning area 7 respectively. 7a and 7b shown. Right of the elevator 5 follows a processing area 8th with soft boilers 22 , These soft-boilers 22 is a supply line 23 for fresh water and an outlet pipe 24 allocated for wastewater. It is understood that in place of the batchwise working soft kettle 22 Also, a continuous washing or soft device could be provided, as has been proposed in itself.
The delivered grain from the input silos 1 first becomes a magnetic separator 9 and then a drum screen 11 fed. This first sieve 11 separates coarse impurities, such as earth tubers, wood and straw parts, so like stones etc. from the grain. Optionally, a second sieve is still provided to discharge small foreign matter, such as sand. To remove dust particles, the grain can then be subjected to a further screening by an air stream. Then the brewing cereal or the barley becomes a balance 10 fed. This pre-cleaning must be carried out at high bulk material throughputs and therefore may not separate the impurities from the grain grains.
After the pre-cleaning 6 The pre-cleaned grain arrives in raw fruit silos 14 and stands there for cereals od. Like. Separately ready for further processing. The further processing initially preferably comprises a first cleaning 7a and a second cleaning 7b , When using different cereals different procedures can be used. For example, the desired blend of different cereals can be added directly to the raw fruit silos 14 be generated so that the grain mixture is processed further. If necessary, however, the different types of grain arrive separately through the first cleaning 6 and are only then mixed, or it is envisaged that the different cereals are also performed separately through the second cleaning and preferably before the switch, but possibly also only after that, are mixed. To process a particular cereal mixture, the necessary cereals are the silos 14 taken and with the help of the raw fruit silos 14 respectively assigned quantity controllers 15 mixed and over a conveyor 16 a balance determining the weight of the mixture 10a fed. The first cleaning closes to the balance 10a and optionally includes a further magnetic separator 9a , another screening device 11a with an air classifier 12 , if necessary also a stone reader. The sieve device 11a achieved preferably with two vibrating screens a separation into cereal grains and larger and smaller foreign matter. Due to the smaller throughput and the narrower separation limits is one compared to the pre-cleaning 6 better separation achieved.
To the elevator 4 closes in the cleaning stage 7b at least one trieur 18 optionally also a fluidized bed stone reader and / or a light grain reader (the latter are not shown). Because of its vibrations, a stone extractor makes it possible, on the one hand, to separate according to the specific weight and, on the other hand, to separate the air resistance on account of the fluidized bed produced therein. From at least one round and / or spiral and / or disc 18 a separation is carried out according to shape and size by using desired shaped grains continue to be carried out. Undesirable particles, such as stunted grains, breakage, particles that are too long or too round are eliminated.
After another sifting in a plan sifter 11b The individual fractions are weighed using a scale 10a weighed before these in intermediate silos 14a reach. Again, these silos 14a The necessary cereals are taken and with the help of the silos 14a respectively assigned quantity controllers 15 mixed and over a conveyor 16 a balance determining the weight of the mixture 10b be supplied.
In malting plants according to the state of the art, the brewing cereals subsequently reached the soft kettle immediately 22 , However, since stubborn impurities usually still adhere to the shell of the cereal grains, there is a considerable contamination of the soft water and possibly also to a higher consumption of fresh water than would be desirable. In addition, there is a now increasingly difficult to solve disposal problem for this wastewater.
To mitigate this problem at least, is according to the invention after the second purification 7b and before the soft step with the boilers 22 a gentle scouring device 13 provided, which is preferably such that the scouring process mainly by rubbing the surfaces of the cereal grains together. This scrubber device 13 may be a Trockenscheuermaschi ne, as it is preferred, but it may also be, depending on the application, a wet or wet scrubber machine. If desired, it is also possible to successively connect a dry scrubber device and a wet scrubber device.
The scrubber 13 has a working housing 100 with an enema 101 as well as an outlet 102 for the cleaned cereal. Inside the work enclosure 100 is a cylindrical scouring coat 103 arranged stationary, within which a rotatable about a horizontal axis rotor 105 on both end sides in camps 106 stored and by a drive motor 28 via a belt drive 107 is drivable. The working housing 100 opens in the middle part at the bottom in a collection funnel 17 over which the abrasion abrasion is dissipated. With this abrasion, dirt remaining on the shells is removed as well as superficial microbial contamination.
The scouring coat 103
consists of sieve sections 109
as well as rasp surfaces 110
, wherein the rasp surfaces preferably for adjusting the effective working gap between the rotor 105
and these rasp surfaces 110
against the rotor 105
are available or wegstellbar. The rasping surfaces 110
are expediently at least in part, as indicated in the drawing, provided with projections and / or depressions for promoting a relative movement between the surfaces of the cereal grains. Rasp surfaces preferably change over the circumference, seen in cross section 110
and screen surfaces 109
from. But it can also be a training of the sieve are chosen, as they are from the DE 13 347 A
has become known in which the edges of a Schlitzsiebes are partially bent inwards and thus form inwardly projecting projections in the slots formed by the slots. On the other hand, the projections need not necessarily be formed of rigid material, because they should favor only the relative movement between the surfaces of the cereal grains. More or less elastic projections are quite possible, although they are not preferred because of a feared susceptibility to wear.
In the example shown, the scrubbing coat alternately sieve sections 109 and rasping surfaces 110 so that the abrasion abrasion immediately after its formation immediately through the sieve sections 109 from the workroom 111 between being removed. The rotor 105 in turn, is approximately octagonal in cross-section, so that alternately each one of the eight surfaces themselves as a rasp surface 112 (with protrusions and / or depressions) and as a conveying surface 113 , ie with a spiral screw (as shown) - with the exception of an inlet section - is formed. The conveyor surfaces 113 extend over the entire length of the working space 111 and are only in the inlet section by corresponding, distributed over the entire circumference auger elements 114 coarser structure and possibly larger diameter complements, so in the area of the inlet 101 an auger 115 to build.
In the outlet area 116 is expediently only schematically indicated backflow flap 117 attached and hinged at the upper end, for the simplest cases by sliding weights 118 is adjustable for a respective peeling intensity, as is known per se in Reisschäl- or -poliermaschinen. It should be mentioned here that the scouring machine to be provided according to the invention need not necessarily be formed in the illustrated, preferred manner. For example, would be a, z. B. surrounded by a sieve wall, vessel with a stirrer conceivable that gives the grains with each other a relative movement. In principle, it is only necessary to roughen the shells of the grains on the surface, on the one hand the water absorption capacity for the subsequent switch in the boilers 22 increased and thus this process step is significantly shortened, on the other hand, the surface adhering impurities continue to remove, so as to make the switch cheaper.