FI84773B - FOERFARANDE FOER FRAMSTAELLNING AV GRANULERTORKAD FETTFRI MJOELK FOER ANVAENDNING SOM FODER. - Google Patents

Description

1 84773

Method for making granulated dried skimmed milk for use as feed.

For use in the manufacture of granular granules for the manufacture of granules

The invention relates to a method for drying skimmed milk, so that this granulated dry product obtained from skimmed milk can be used as a high-quality animal feed, even after long-term storage, preferably in livestock farming.

Characteristic features of known technical solutions

Skimmed milk powder is known to be prepared from defatted whole milk, for example by spray drying and usually for human consumption. It is also known that skimmed milk powder denatured and spray-dried with silicic acid is used as a mixture for feeding animals (DE-OS 26 40 021). The addition of silicic acid already improves the silage properties of the product, which results in longer silo storage. According to DE-AS 18 12 350, feed material used in the rearing of calves is produced using milk fat substitution, this feed product comprising skimmed milk powder, vegetable and animal fats, emulsifiers and finely divided silicic acid. The addition of silicic acid avoids the separation of fats and improves the flow properties and storage stability of the product. DE-OS 17 92 614 discloses a process for preparing feed milk, which process comprises obtaining a milk product, for example powdered skimmed milk, as a mixture having a dry matter content of at least 25% and containing concentrates, protein carriers and active ingredients. Provided that the dry matter content of the feed milk is at least 25%, it is possible to achieve a long shelf life of 2 84773, despite the variations in climatic conditions, without separating the mixture into its components. What all known solutions have in common is that they use skimmed-milk powder and that the shelf life of the product is extended, for example by the addition of silicic acid, or that the edibility of the product is improved by physiological aids.

OBJECT OF THE INVENTION

The object of the invention is to simplify the production of a skimmed milk product as a whole, and to achieve a better utilization of the product so that more energy is released due to the properties associated with the product.

Description of the invention

The object of the invention is to provide a dried, skimmed milk product which is characterized by long shelf life and thus good storability, as well as good physiological tolerance in metabolic events, slow release of energy from the product, and simple dosage.

According to the invention, this object is solved by heating skimmed milk with a solids content of 25 to 75% by weight in a storage tank to a temperature of 303 to 345 K, and spraying it into a fluidized bed at an overpressure of 2 to 15 at. and maintaining the solids content. Using a product temperature of 328 to 338 K and a delay time of at least 0.5 hours, the product granulates to a bulk density of at least 1.15 g / cm3. Continuously or almost continuously, a similar granulated product is added which has been ground so that the average diameter of the cores is less than 0.45 x Dr.a ^ uot · and has a moisture content of not more than 11%, in an amount of less than 40% of the discharged granular product. Finally, the granular product, classified as 5 mm in size, is cooled to a temperature below 308 K.

3,84773

The process of manufacturing the granular product is continuous so that the second storage tank of skimmed milk to be processed during the actual granulation process is pre-treated, thus avoiding mixing of the milk remaining in the storage tank and the milk to be added, and thus slow progressive milking. In this case, it must be ensured that the flow of heated milk remains constant when connected from the first container to the second container. Thus, the pretreated skimmed milk is made usable as a granulated, dried, skimmed-milk product, in accordance with the set task, only if a minimum delay time is observed when the product is used at a predetermined temperature and the bulk density is reached. Correspondingly, due to the achieved solid density, the product decomposes slowly during digestion, which in turn leads to good tolerability and utilization of the product.

Working Example

Skimmed milk with a solids content of about 50% by weight is introduced into the 200-liter tank over an hour. Skimmed milk is heated to 313 K. This feedstock is continuously fed by means of a metering pump, along the pipeline, to a two-material sprayer of about 105 kg / h, which is part of the fluidized bed equipment. The temperature and solids content of the milk then remain unchanged. In the fluidized bed apparatus, the skim milk is sprayed on the solid surface of the fluidized granule mixture at a pressure of 3 at, whereby the granules of the granule mixture increase. The temperature of the solid granules in the fluidized bed is about 333 K, while the temperature of the introduced air is 408 K. To maintain the drying process by granulation, a similar grain mixture with an average grain diameter of 2 mm and a moisture content of 0.1 is almost continuously introduced into the fluidized bed. weight-%. After the diameter of the granules in the fluidized bed has increased to 5 millimeters, which requires a delay time of about 2 hours. The granular mixture is conveyed through a barrier comprising a metering drum to a flow bed condenser. The grain mixture is cooled in this condenser to a temperature of 303 K by the action of air drawn in from the environment. The product stream of finished granules, about 73 kg / h, is divided into two product streams, one of which, 58 kg / h, is directed to storage as a final product with a water content of 9.1% by weight and a granule diameter of 5 mm, while the remaining product stream , 15 kg / h, is comminuted in a suitable grinder to an average grain size of 2 millimeters and is further passed to a fluidized bed to maintain the granulation process. The process is made continuous so that during the granulation drying process, the second milk container is pretreated. In this case, it can be guaranteed that no decomposition phenomena occur before the granulation.

Claims (1)

5,84773 Claim A process for preparing granulated dried skimmed milk for use as a valuable feed, preferably for livestock farming, characterized in that the skimmed milk has a solids content of 25. . 75% by weight, heated to a temperature of 303 to 345 K and sprayed to maintain the temperature and solids content by means of overpressure in a fluidised bed in which, at a product temperature of 328 to 338 K and a lag time of more than 0,5 hours, the product granulates, that it has a net density of at least 1,15 g / cm3, after which the granular product, classified as 5 mm in size, is discharged from the apparatus and cooled to below 308 K, with the continuous or almost continuous addition of granulated, similar product ground in such a way that: the average diameter of the cores is less than 0.45 XD ».products · with a product moisture content not exceeding 11%, in an amount less than 40% of the granular product discharged from the equipment. Fertilizers for the production of granular feeds for the production of granules, which are specially designed for use in the manufacture of granules, for a maximum of 30 to 34% of the total capacity of 30 to 34% the temperature and the fastening temperature of the inverted granules and the temperature of the product are up to 328 ... 338 K and the maximum temperature of which is less than 0, 5 h at a temperature of less than 1, 15 g / cm3, varefter up to opening of the granules 5 mm is classified as granular products under 308 K, varvid man kontinuerligt eller nästan kontinuerligt tillsätter -. granular products of the same type as those found in the genome-free core are less than 0.45 X with a maximum yield of 11% and less than 40% of the granules.