JPH08205848A - Method for optimizing refining processing by selecting barley husk and its apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a large volume of refined husks useful as a filter auxiliary and increase the yield of malt by moistening the malt having the husks adhering thereto, subjecting the malt and husks to a pressurizing treatment between hard surfaces, effecting a first separation of the husks from the malt and subsequently subjecting the separated husks to an impact treatment in a second separation step.

SOLUTION: This process for separating husks from malt comprises feeding malt having husks adhering thereto from a silo into a sieve 5 and a stone- removing device 6 through a weighing device 2 and a mixing device 3 to refine the malt, further feeding the refined malt into a net device 8 through a weighing device 7 to slightly moisten the malt, subjecting the malt to a pressurization treatment in a husk-separating mill 9 to separate the malt from the husks, guiding the separated malt into a silo 14 through a storage tank 13, feeding the husks into an impact mill 15 with an elevator 4b to remove residual malt adhered to the husks, and subsequently collecting the husks as a filter auxiliary into a storage tank 13'.

COPYRIGHT: (C)1996,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for separating malt and malt.

[0002]

During the brewing process it is necessary to separate the solid and liquid components in so-called mycin. This treatment is carried out by settling in a conventional charging chamber equipped with a fining tank. In that case, in particular, the malt insoluble shell, ie the malt, will settle on the double bottom of the fining tank, forming a natural filter layer through which liquid is drawn downwards.

[0003]

The object of the present invention is to provide a more homogeneous filter bed, 1. Increase the relative load of the fining tank, thereby reducing the size of the fining tank to save costs. Filtering through the filter bed described above particularly effectively with respect to clarity and throughput per hour; It is to remove a part of the wheat husks before the fermentation process to remove undesired substances such as polyhydric phenols and anthocyans from the wheat husks and to obtain a well-patterned clarified bed.

[0004]

According to the present invention, the above-mentioned problems are solved by the following treatment steps: a) first moistening the malt to which the malt is attached, and b) then adhering the malt to the hard surface. C) and then separating the malt from the malt, and d) adding the shock treatment to the malt separated in the treatment step of c) to separate the malt from the malt. Has been solved by the method.

Further, according to the present invention, the above object is to provide a device to be connected in the following order: a) a humidifying device 8; b) a mill 9 having at least two grinding surfaces 9a that move relative to each other; The separation device 9b for separating ground malt and d) an impacting device 15, 15a with an inlet and an outlet for impacting the malt to remove the adhering malt particles are carried out and the method described above is carried out. Has been solved by the device.

Other advantageous configurations according to the invention are described in the dependent claims.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The present invention is premised on the recognition that the properties of wheat husks are the decisive factor in improving filter characteristics. Each of the process steps in the combination of process steps has already been proposed for other purposes. That is, German Patent No. C972592 discloses that the germinated barley is moistened to the tip and then ground. This is done to swell the pores in the difficult-to-treat macromolecular components and is not relevant to obtaining pure malt.

[0008] German Patent No. C1068202 discloses wet germ removal of green malt and also mentions germ removal by a shock centrifuge accelerator. Here too, we haven't got a pure barley. East German Patent No. A1
No. 3778 describes making coarse grain additives from barley residues having a particle size of 2 mm or less. In that case, the material is spun down to remove the husks, but it is clear that at such particle size most of the husks have already been removed, leaving only a small portion of the husks.

Combining the features of the present invention, a relatively gentle impact treatment of step (d) is used to purify the wheat husks. Therefore, the arrangement of claim 4, in particular a sieve drum with an internal rotor, is suitable for this purpose, in particular an adjustable sieve drum for adjusting the impact strength. Although the malt is certainly already separated from the malt in the treatment step (c), small malt particles are still attached to this malt, which is especially a part of the malt mentioned in the above item 3. With regard to removal from the process, this will result in loss of extract. That is, according to the present invention, the separation of the malt and the malt is carried out in two steps, that is, coarse separation (usually a sieve) and fine separation (by impact). In that case, the additional components of the malt thus obtained are obtained as a quasi-secondary effect.

Indeed, the treatment step (b) can be carried out in various ways, such as a vise that pushes against each other. But,
According to this invention, there is a method according to claim 2. In that case, there are, for example, grooved rolls cooperating with the stator, or also other (eg cone crusher) rotors. However, it is also preferable to make it as in claim 3. For example, in an impact centrifugal accelerator that separates malt husks in which air flows upward and is lighter than particles of malt falling downwards, it is of course possible to separately obtain malt residue and malt at the outlet. Therefore, it can be seen that it is rational to do as in claim 4.

[0011]

The details and advantages of the present invention will now be described by way of non-limiting examples, which are shown schematically in the drawings. In the malt processing device, there are a large number of silos 1 for different types of malt. Only two of these silos are shown here. In order to introduce weighed amounts of various types of malt into the mixing device 3, it is effective to have one weighing device 2 at each outlet of the silo.

The mixed malt is then introduced into the refining process via the elevator 4, which in the illustrated embodiment is a sieve 5 with suction (to remove dust).
And a subsequent gravity separator (“stone remover”) 6, optionally and additionally or alternatively other refining machines may be used. After the first refining step, it is possible to carry out the weighing control with the scale 7, or to carry out this weighing additionally after the following refining step, if necessary.

After being newly raised by the elevator 4a, if necessary, a magnetic separator is used to remove the metal that still remains, and this completes the usual pre-purification step. On the one hand, to obtain the maximum yield of malt and on the other hand a particularly clean composition of malt,
Lightly moisten the malt in the netting device 8. In other words, the amount of water added should be 10% or less by weight, and generally, depending on the type of malt,
Between 1% and 5%. Good results have been obtained with the addition of about 2% water. This slight moistening makes the brittle husks elastic in the dry state, so that the grinding process can be overcome,
Will not be crushed.

It is effective to carry out this pressurizing treatment in a malt shelling mill 9 having at least one pair, preferably two pairs of rolls 9a and a subsequent sieve 9b, as is known. A preferred embodiment of such a mill is described in EP B03577.
62. In this case, roll 9a
And the sieve 9b are advantageously arranged in a common mill frame.

Grinding between the hard surfaces of roll 9a (unlike grinding with a pressurized fluid where residence occurs)
The malt is not coarsely ground, but most of it is separated from the elastic malt hulls. Due to their elasticity, these wheat husks remain altogether and are therefore sized so that they can be easily separated by the sieve 9b. Thus, it can be seen that the portion of malt falling through the sieve mesh has a higher degree of purity and a negligible component of ground malt.

On the other hand, the completely left malt becomes the upper component of the sieve and is introduced into the other elevator 4b via the outlet valve 11 following the connected sluice valve 10a. At the same time, the malt portion removed from the malt reaches the blast-proof storage tank 13 equipped with the dustproof filter 12 via the sluice valve 10b.
Malt is discharged from the storage tank 13 by a screw conveyor 13a
In some cases, it is introduced into the silo 14 or the like.

Although the described measures to obtain a portion of malt which is as pure as possible and a malt that is as clean and complete as possible have already given good results, this is not yet sufficient for the purpose in question. That is, malt particles, germ residue and the like are still attached to the wort, and therefore when these are used as filtering means during clarification, the color and flavor of the original wort to be obtained,
It has an undesired effect on the extraction quantity and quality.

The wheat husks are then further impacted in the impact mill 15 by the method of the invention. In this treatment, the malt residue adhering to the malt is removed. This construction results in additional yields of malt that should have been lost when the coarse and fine products are discharged in conduit 16 separately, for example by the construction of a device such as a rotor, which is generally surrounded by a sieve. In contrast, a storage tank 13 ', which is formed in a manner similar to the storage storage tank 13, collects the wheat husks to be used later as a filter aid. Therefore, this device is used as a shock centrifuge. There is no obvious difference between the impact grinder and the impact centrifuge sorter in which the impact is used for milling, so both are included by the name "centrifugal acceleration impact mill" within the framework of this disclosure. I will do it.

Other impact mills may be provided at the outlet with another sieving means and / or a sorting means for separating malt and malt. However, as described above, the centrifugal acceleration impact mill is preferable, and in such an apparatus, the sieve may be incorporated by a method of forming the impact surface surrounding the centrifugal acceleration plate as the sieve surface. Such a structure has proven to be optimal in practice.

In this way, a very pure and large volume of husks is obtained which is an excellent filter aid. In addition, the desired secondary effect is increased malt yield. Since the centrifugal acceleration impact mill generally has a centrifugal acceleration plate concentric with the impact wall, this centrifugal acceleration plate is well known, and as shown in FIG. It can also be used to act as a rotor. While feeding the malt material with malt still adhering from the outlet of the roll mill (for example, 9) to the centrifugal acceleration impact mill 15a via the optional feeding device 20, at the position shown in the figure or at a lower position. An air conduit 17 is arranged at.

In this case, the conduit 17 is approximately at the level of the centrifugal acceleration rotor 15b shown, on which the air is sucked, preferably by means of a blower 18 provided on a cyclone separator (not shown). In this way, the air flowing upward carries light wheat husks, is collected by the cyclone separator, and can be introduced into, for example, the storage tank 13 '. On the other hand, the beaten-down malt particles fall from the conduit 19 below the centrifugal acceleration impact mill and are either packed into a bag or mixed with the malt in the storage tank 13.

Next, the method of the present invention will be described based on a non-limiting embodiment. In order to cleanly separate the malt from malt flour and coarsely ground grain and to leave no powdered malt, following the two-step pre-purification described above, first a humidifier immediately before the grinding process. Humidify in 8. As mentioned above, barley is a substance that impairs the flavor of beer,
For example, since it contains polyhydric phenols and anthocyans, depending on the conditions, it may be disadvantageous if the barley remains during fermentation. Therefore, a clean separation of the barley will improve the beer flavor.

As described above, it is effective to moisturize malt just before grinding. This is because the elasticity of the obtained husks is ensured. It is effective to configure the humidifier so as to secure the residence time after introducing the liquid, especially water. As can be seen from FIG. 1, the addition of H ₂ O takes place in the first third of the humidifier 8,
There is a time, for example, 1 to 2 minutes, until the moisture acts on the wheat husk before it leaves the humidifier 8. As an alternative method, a passage container may be provided after the humidification device 8 in order to ensure the required working period.

After adjusting the malt by the humidifying device 8, a grinding process is carried out in a mill 9 in a conventional manner. After the grinding process, the wheat husks may be weighed. For example, when loading an amount of 12 t / h at the inlet of mill 9, about 3 t / h of husks was obtained. Wheat husks that retain this shape have a fairly large volume. That is, it became about 23 m ³ / h. This must be taken into consideration when designing the storage tank 14a.

Therefore, at the outlet of the conduit 11, two centrifugal acceleration impact mills were connected in parallel in this case so that this large volume could be processed. At the beginning (before mill 9) the amount of malt was about 12.6%, but after sieve 9b it was 25.2% malt-containing malt. In that case,
The volume of the husks was 750 ml / 100 g. The volume of this hull increased to 1100 ml / 100 g after centrifugal acceleration impact mill 15 (a basket-like sieve around the centrifugal accelerating plate, the number of rotations was controllable). This was a 32% increase over the volume after mill 9 and at the same time a corresponding amount of malt particles was obtained.

This centrifugal acceleration impact mill 15 was tentatively operated at various rotation speeds, that is, at a rotation speed of the centrifugal acceleration plate of 450 to 800 rpm. In that case, the velocity of the barley was 12 to 23 m / s. Best results were obtained at 16 to 19 m / s. The malt thus obtained was at the end of brewing, cheap, easy to dispose of and still used as a filter aid. Due to the large volume of this wort, a small amount of weight was added to the wort or sedimentation process, which reduced the effect of polyhydric phenols and gave a "mellow" flavored beer, There is no need to worry about loss of extract due to residual extract of wort when removing it. In comparison, without the treatment according to the invention, the volume of wheat husks is reduced, which results in a higher amount of wheat husks (compared to the filter bed obtained according to the invention) at the same level. As a result, the amount of tannins to be extracted is increased, resulting in impairing the flavor of beer.

[0027]

As described above, the method and apparatus according to the present invention provide a more homogeneous filter bed. 1. Increase the relative load of the fining tank, thereby reducing the size of the fining tank to save costs. Filtering through the filter bed described above particularly effectively with respect to clarity and throughput per hour; It has the advantage of removing some of the husks prior to the fermentation process to remove undesired substances such as polyphenols and anthocyans from the husks, resulting in a well-patterned clarified bed. To be

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an entire apparatus of the present invention.

2 shows a detailed embodiment of the device of FIG.

[Explanation of symbols]

 1 Silo 2 Weighing Device 3 Mixing Device 4, 4b Elevator 5 Sieve 6 Gravity Separation Device 7 Scale 8 Humidifying Device 9 Mill 9a Pressurizing Surface (Roll) 9b Separation Means (Sieve) 10a, 10b Gate Valve 11 Outlet Conduit 12 Dust Filter 13, 13 'Storage tank 13a Discharge screw conveyor 14 Silo 15, 15a Impact means (centrifugal acceleration impact mill) 15b Centrifugal acceleration rotor 16 Conduit 17 Air conduit 18 Sorting means (blower) 19 Conduit 20 Supply device

Claims (16)

[Claims] 1. A subsequent treatment step, a) first moistening the malt with malt husks, b) then treating the malt with malt husks by applying pressure between the hard surfaces, and c) then the malt husks. Is separated from malt, and d) is added to the hull separated in the treatment step of c), and then an impact treatment is applied. 2. The process step b) is carried out in a roll mill (9) with the hard surfaces of at least one roll (9a), preferably at least two rolls. Method. 3. Process according to claim 2, characterized in that the roll mill used is a shelling mill (9) incorporating at least one sieve (9b) for carrying out process step c). 4. The method according to claim 1, wherein at least one sieving or classification step is also carried out after the treatment step d). 5. The impact treatment is performed by centrifugally accelerating malt hulls having malt particles attached thereto to collide with an outer impact surface in the radial direction. the method of. 6. The method according to claim 1, wherein the processing step a) is carried out immediately before the processing step b). 7. A malt hull having attached malt particles is
7. Method according to any one of claims 1 to 6, characterized in that the impact surface of the centrifugal acceleration impact mill is impinged at a velocity of 23 m / s, preferably 16 to 19 m / s. 8. Device for connecting in the following order: a) humidifying device (8), b) at least two grinding surfaces (9a) moving relative to each other.
(9) with c), c) Separation device (9b) for separating wort and ground malt,
And d) an impact device (15, 15a) having an inlet and an outlet for impacting the malt to remove the adhering malt particles, and carrying out the method according to any one of claims 1 to 7. apparatus. 9. Device according to claim 8, characterized in that the separating device comprises at least one sieve (9b) with one outlet each at the top and the bottom. 10. Device according to claim 9, characterized in that the upper outlet of the sieve is connected via a transport means to the inlet of the subsequent impact means (15, 15a). 11. Apparatus according to claim 9 or 10, characterized in that the screen (9b) together with at least a pair of rolls (9a) are mounted on a common frame. 12. Impact means (15a) and / or a sieve means (15a).
An apparatus according to any one of claims 8 to 11, characterized in that a sorting means (17, 18) is arranged. 13. Impact means (15a) is formed as a centrifugal accelerating device having a rotor driven by a drive means for centrifugally accelerating the malt to impinge on an external impact surface in the radial direction. The device according to any one of claims 8 to 12. 14. The device according to claim 13, wherein the external impact surface is formed as a sieve surface for separating the malted particles that have been beaten off. 15. The centrifugal accelerating device (15b) accelerates the malt hulls having attached malt particles to the impact surface at a speed of 12 to 23 m / s, preferably 16 to 19 m / s. 15. Device according to claim 13 or 14, characterized in that 16. The humidifier (8) comprises the mill (9).
The connection is made immediately before the connection.
5. The device according to any one of item 5.