DD230793A1 - METHOD OF CORN DRY DETECTION - Google Patents

Abstract

Method for maize dry sterilization, characterized in that the dry corn with a peeling machine with z. B. fixed coat and a working speed of 240 to 280 rev / min is shaken, then the shredded corn is crushed by impaction and z. B. with a Plansichter in 3 fractions, Gruetze with germs, semolina and flour, is spotted and the fraction Gruetze with germs germinated by means of corrugated roll mill germ-friendly and the millbase obtained according to the invention is sorted on a further Plansichter in clean germs, semolina and flour.

Description

Fields of application of the invention

The said process can be used in any existing wheat or rye grinder without major investment in corn milling. In particular for corn semolina and maize meal for nutrition. But also for corn semolina production as a raw fruit for the brewing industry. Mainly, it is important to remove the maize germ and peel from the remaining corn kernels in order to lower the fat content of the finished products significantly to ensure better shelf life. This method is not intended for the production of corn grits.

Well-known technical solutions

I am primarily the Beall method known, the corn is previously treated with water or steam, the so-called wet sterilization.

This method is used in particular for corn grit production for the comflakes production. For comparison for the above-mentioned fields of application, this method is considerably higher in energy consumption, and in the semolina and flour yield lower values, calculated from the total grain, are achieved.

Secondly, I am aware of the process of Bühler, Uzwil (Switzerland) through brochures. There, a specially developed maize peeling machine with subsequent impact extractor and table reader is used for sterilization of maize, especially for maize grit production.

In this process, which is certainly effective, but I think the energy needs of the impaction centrifugal at an hourly power of 1.5-2, Ot corn with 5.5 KW too high. In addition, a table reader is used here.

Third, the procedure is known by Degermenator of Olcrim, Italy through leaflets. This method also works in conjunction with a table reader for corn grit extraction and is machine-rich and thus more energy-intensive, which does not seem necessary for the mentioned application.

Fourth, the method and apparatus for treating corn BRD Patent Publication 2754722 is known. This method also works mainly for gritting corn in conjunction with a desk reader. However, here the cleaning and impact work is combined in one machine, whereby a 30-40% lower energy consumption compared to the previous method is given.

Object of the invention

It is a low-fat, good end product maize semolina, maize meal and Maizegrieß (Maize raw fruit) for the brewing industry with high yield of the basic material maize, with low machinery and thus an energy and cost solution can be achieved.

This is achieved in that the corn is fed to the main cleaning after pre-cleaning as in other methods. On a conventional lying peeling machine with a fixed jacket 0600 χ 1000 Length ² h covered with emery, and ^1/3 of the sheath slit sheet and specially made-up to paddles, similar to a Getreidebürstmaschine with 240-280U / min continuously be trash and dust is removed.

There is no breakage generated, power approx. 1 500kg / h.

This is followed by comminution on a purpose-built Impact Spreader GM406A01 from VEB Mühlenbau Dresden, which is actually intended to kill mill pests in flour.

The direct drive of this machine has been converted into a drive that can be controlled by 4 stages.

Starting at 1760 rpm to 2 630 rpm, depending on the required degree of comminution of the corn kernel. To grasp the grains, wedge ribs were installed between the impeller blades.

By this process, the germ is released from the grain and not damaged due to its elasticity. This machine operates without aspiration dust-free, since the generated air is used in the circulation.

Experiments have shown that the machine operates at a power of 1 500-2000 kg with 2.2 KW trouble-free and reliable.

The millbase obtained in this way is sorted on a plan sifter compartment into three fractions. In groats with germs, meal and

Groats and germs were conducted without table reader on a roller mill for the actual sterilization, the germ content is about 12-18% depending on the corn.

The fine meal obtained from the plan sifter can either be ground to flour or obtained as a semolina via the cleaning machine, as required. The material that has passed on to the roller mill is thus already considerably pre-shredded and is now ground on the roll mill in order to effectively separate the germ from the other grain parts.

This was a 250mm 0 roller mill with 350 rev / min in number of corrugations, swirl, Riffelwinkel, Riffelstellung and overfeed so

changed that a germ-preserving grinding can be performed. , -

The germ is preserved by its approx. 15% fat content, it is pressed flat, whereby the other maize parts are crushed into semolina with little flour formation due to their glassy fragility.

The entire regrind is then sorted on a Plansichterabteil in 4 fractions. In: 1. clean germs

2. coarse corn

3. fine corn

4. cornmeal

The grits can then be milled to flour or the coarse grits to fine grits as in the wheat trash.

With this method, a clean separation of the seed from the corn kernel is achieved with relatively low machinery and thus lower energy consumption. There are no corn kernels similar corn kernels with in the germs, as possibly.

at the table reader.

Thus, an effective yield of corn semolina or cornmeal can be achieved.

The maize germs thus obtained can either be used directly or further processed as high-quality fat and vitamin-rich feed use and be deducted separately.

Claims (4)

1. Method of corn-dry sterilization characterized in that the dry corn peeled by means of peeling machine, then crushed by impaction, then spotted in groats with germs, semolina and flour, the groats with germs is ground by means of grooved roll mill and then into clean germs , Semolina and flour is spotted. -1- ZbS 3US claims: 2. The method according to claim 1, characterized in that the peeling machine operates at a speed of 240-280 U / min. 3. The method according to claim 1, characterized in that the roller mill max. 4 corrugations per cm roll circumference, the corrugations have a twist ^ 10% and a flat corrugation angle and the rollers are inserted edge to edge.