JP2000053993A - Production of fat-and-oil-containing granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain, using compact apparatuses, granules containing fat-and-oil in high concentrations, excellent in dissolvability and causing no blocking by adding fat-and-oil to a powder stock such as for food using an agitation granulator to conduct a primary granulation, followed by spraying the resultant granules with water or the like using a fluidized bed granulator to effect surface modification of the granules. SOLUTION: The objective granules are obtained by the following process: fat-and-oil is added to a powder stock such as for food or feed using an agitation granulator 1 to conduct a primary granulation, and the resulting granules are then sprayed with pref. fat-and-oil followed by water or hot water using a fluidized bed granulator 2 to effect surface modification of the granules, wherein it is preferable that the fat-and-oil spraying operation using the fluidized bed granulator is conducted under feeding of cooling air, while the (hot) water spraying is performed under feeding hot air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for granulating a raw material powder of food or feed by adding fats and oils, and more particularly to a method for producing fat-containing granules by adding fats and oils at a high concentration to granulate. In the present invention, adding high-concentration fats and oils means adding 15 parts by weight or more of fats and oils to 100 parts by weight of raw material powder. The emulsified fats and oils are those obtained by stirring and mixing the fats and oils with water or warm water to disperse the fats and oils in water or warm water.

[0002]

2. Description of the Related Art In order to obtain granules to which fats and oils are added, such as feeds such as artificial milk and milk substitutes for livestock and foods such as seasonings, powdered milks and powdered soups, a stirring granulation method and a fluidizing method are required. A layer granulation method has been performed. The agitation granulation method has the feature that fats and oils can be added at a high speed, and large-scale processing is possible.However, the upper limit of the fats and oils addition rate to the product is low, and when the fats and oils addition rate is high, the product is compacted when packed in a bag. Has the disadvantage that the solubility deteriorates. In the fluidized-bed granulation method, the addition rate of fats and oils to the product can be relatively high, but the processing capacity can form a fluidized bed. However, there is a disadvantage that the apparatus cannot be processed in a large amount and the apparatus becomes large in size because it depends on the oil spraying speed.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fat and oil-containing granule which has a high fat addition ratio, can be processed in a large amount, does not block products, and has excellent solubility. Is to provide a granulation method.

[0004]

The inventor of the present invention has studied various methods for adding fats and oils to powder at a high concentration using a stirring granulator and a fluidized bed granulator. By using a fluidized bed granulator in combination, even if the concentration of fats and oils is such that the product blocks only with stirring granulation, it can be sprayed with water or hot water with a fluidized bed granulator to modify the surface. , That blocking can be prevented, and if the surface is modified by adding fats and oils with a stirring granulator, spraying water or hot water after further spraying fats and oils with a fluidized bed granulator, or spraying emulsified fats and oils, The inventors have found that fats and oils can be added at a higher concentration without causing blocking, thereby completing the present invention.

[0005] That is, a method according to the first aspect of the present invention for solving the above-mentioned problems is directed to a method for producing oil-and-fat-containing granules in which granules containing a high concentration of fats and oils in a powdery raw material such as food and feed are granulated. After adding oil and fat with a stirring granulator and performing primary granulation, water or hot water is sprayed with a fluidized bed granulator to perform surface modification. by this,
In stirring granulation, it is possible to add fats and oils to a concentration at which blocking occurs.

According to a second aspect of the present invention, there is provided a method for producing oil-and-fat-containing granules, comprising granulating granules containing a high concentration of fats and oils in a powder material such as food or feed. After the primary granulation by adding fats and oils with a granulator,
It is characterized by spraying oils and fats with a fluidized bed granulator and further spraying water or hot water to perform surface modification. Thereby, fats and oils can be added to a higher concentration.

According to a third aspect of the present invention, in addition to the requirements of the second aspect, the spraying of the fat or oil in the fluidized bed granulator is performed under a supply of cold air, and the spraying of water or hot water is performed. Is performed under hot air supply. As a result, the oils and fats are sprayed under cold air, so that they are quickly solidified on the particle surface, and water or hot water is sprayed under hot air, so that the surface modification of the particles can be performed quickly.

According to a fourth aspect of the present invention, there is provided a method for producing oil-and-fat-containing granules which comprises granulating granules containing a high concentration of fats and oils in a powder material such as food or feed. After the primary granulation by adding fats and oils with a granulator,
It is characterized in that the surface is modified by spraying emulsified fats and oils with a fluidized bed granulator. Thereby, the step of separately spraying the fat and oil and water or hot water can be simplified.

A method according to a fifth aspect of the present invention for achieving the above object is characterized in that, in addition to the requirements described in the fourth aspect, the emulsified fat or oil is sprayed under a hot air supply. Thereby, the surface modification of the particles can be performed promptly.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows the invention according to claim 1 (first embodiment) or claim 4,
FIG. 2 is a schematic view of an apparatus for implementing the invention (third embodiment) according to the fifth aspect, and FIG. 2 is a schematic view of an apparatus for implementing the invention (second embodiment) according to the second and third aspects. is there. Reference numeral 1 denotes a stirring granulator, the shape of which is not particularly limited. However, the stirring granulator described in JP-A-6-182178 and JP-A-7-112124 or the so-called so-called JP-B-57-7770 is disclosed. A high-speed agitation granulator capable of mass processing, such as a Sugi-type granulator, is desirable. Reference numeral 2 denotes a fluidized bed granulator, in which a hot air blowing chamber 3 and a cold air blowing chamber 4 for supplying fluidized gas are provided below the perforated plate 6, and a spray nozzle 5 is provided above the perforated plate 6. It is a device provided. The spray nozzle 5 may be a one-fluid nozzle or a two-fluid nozzle, and can be used properly depending on what is sprayed.

A first embodiment will be described with reference to FIG. The feed or food powder raw material and the fats and oils are charged into the stirring granulator 1 and granulated, and the granulated material is charged into the fluidized bed granulator 2. The granulated material put into one end of the fluidized bed granulator 2 is sprayed with water or hot water from a spray nozzle provided at an upper part of the hot air blowing chamber 3 while being flow-transferred toward the other end, and cooled. The product is finished and cooled in the upper part of the air blowing chamber 4 to be a product, and is discharged from the fluidized bed granulator 2. During this time, the surface of the particles undergoes a surface modification action such as hardening by sprayed water or hot water and cooling air. Thereby, even if the blocking is caused by the addition of the fat or oil by the stirring granulator, this can be prevented. The hot air blown into the hot air blowing chamber 3 is desirably about 60 to 100 ° C., and the cool air blown into the cold air blowing chamber 4 is −5 to 20 ° C.
A degree is desirable.

Next, a second embodiment will be described with reference to FIG. In the apparatus used in the second embodiment, the fluidized-gas supply chamber of the fluidized-bed granulator 2 is configured such that the cold-air blowing chamber 4-1 moves from the granulated material input side to the product discharge side. A spray nozzle 5-1 which is divided into a wind blowing chamber 3 and a cold wind blowing chamber 4-2, and sprays oil and fat on an upper portion of the cold wind blowing chamber 4-1.
However, a spray nozzle 5-2 for spraying water or hot water is provided above the hot air blowing chamber 3,
Other points are the same as those of the device used in the first embodiment. Feed or food powder raw materials and fats and oils are put into a stirring granulator 1 and granulated, and the granulated material is fluidized bed granulator 2
It is thrown into. The granulated material charged into the fluidized bed granulator 2 is
Oil and fat (melted solid fat) is further added from the spray nozzle 5-1 at the upper part of the cold air blowing chamber 4-1 and water or hot water is sprayed from the spray nozzle 5-2 at the upper part of the hot air blowing chamber 3. Then, it is finished and cooled in the cold air blowing chamber 4-2 and discharged as a product. During this time, the fats and oils are sprayed under the supply of cold air, so that they quickly solidify, and are sprayed with water or hot water under the supply of hot air, and then subjected to finish cooling, so that the surface modification action such as hardening of the surface of the particles is quickly performed. . Therefore, it is possible to obtain granules excellent in solubility that do not cause blocking even when oils and fats are added at a higher concentration. The temperature of the cool air blown into the cool air blowing chamber 4-1 is preferably about room temperature, but other temperatures may be the same as those in the first embodiment.

Next, a third embodiment will be described with reference to FIG. The difference between the third embodiment and the first embodiment is that what is sprayed from the spray nozzle 5 is water or hot water in the first embodiment, whereas it is water or hot water in the third embodiment. It is an emulsified fat, and the other points are common. According to this, since the emulsified fat is sprayed from the spray nozzle 5, there is an effect that the addition of the fat and oil and the surface modification of the granulated material can be performed at the same time.

[0014]

EXAMPLES Next, granules for milk replacer of calf are agitated and granulated as a method according to the present invention and as a comparative example.

[0015]

[Table 1]

Agitating granulator 1 comprises 25 parts by weight of fat (tallow oil) per 100 parts by weight of raw material powder mainly composed of skim milk powder.
The granulated product obtained in the above was satisfactory in solubility, but was unsatisfactory in terms of blocking (Test 1). The granulated product to which 32 parts by weight of fat or oil was added was not satisfactory in terms of solubility, and was not possible in terms of blocking (Test 2). When the granulated product of Test 1 was charged into the fluidized bed granulator 2 and sprayed with water to perform surface modification, both the solubility and the blocking were satisfactory (Test 3, First Test).
Embodiment). Injecting the granulated product of Test 1 into the fluidized bed granulator 2, spraying 12 parts by weight of fats and oils under cold air supply and spraying 8 parts by weight of water under hot air supply. Both the solubility and blocking are satisfactory. It was possible (Test 4, Second Embodiment). Further, the granulated product of Test 1 is added to the fluidized bed granulator 2
And sprayed emulsified fats and oils consisting of 12 parts by weight of fats and oils and 8 parts by weight of water under hot air supply, and it was possible to obtain granules having satisfactory solubility and blocking in this method (Test 5). Third embodiment).

[0017]

As described above, the present invention uses a combination of an agitation granulator and a fluidized bed granulator to reduce the rate of addition of fats and oils that cannot be achieved in a fluidized bed granulation process. In the fluidized bed granulation process, the addition of fats and oils to a high content, which is difficult with stirring granulation, and the surface modification of the granulated product by spraying with water or hot water, results in blocking with excellent solubility. Granules containing fats and oils at a high concentration can be obtained with a compact apparatus.

[0018]

[Brief description of the drawings]

FIG. 1 is a schematic view of an apparatus used in first and third embodiments of the present invention.

FIG. 2 is a schematic view of an apparatus used in a second embodiment of the present invention.

[Explanation of symbols]

 1 stir granulator 2 fluidized bed granulator 3 hot air blowing chamber 4 cold air blowing chamber 5 spray nozzle 6 perforated plate

Claims (5)

[Claims] Claims: 1. A method for producing a fat-containing granule in which granules containing a high concentration of fats and oils are granulated into powdery raw materials such as foods and feeds. A method for producing oil-and-fat-containing granules, which comprises spraying water or warm water with a fluidized-bed granulator to perform surface modification. 2. A method for producing oil-and-fat-containing granules in which granules containing a high concentration of oil and fat are granulated into powdery raw materials such as foods and feeds. Thereafter, a method of producing oil-and-fat-containing granules, which comprises spraying oil or fat with a fluidized-bed granulator and further spraying water or hot water to perform surface modification. 3. The method for producing oil-containing granules according to claim 2, wherein the spraying of the fat or oil in the fluidized bed granulator is performed under a supply of cold air, and the spraying of water or hot water is performed under a supply of hot air. . 4. A method for producing oil-and-fat-containing granules in which granules containing a high concentration of oil and fat are granulated into a powdery raw material such as food or feed, wherein the oil or fat is added by a stirring granulator to perform primary granulation. A method for producing oil-and-fat-containing granules, which comprises spraying the emulsified oil or fat with a fluidized-bed granulator and modifying the surface. 5. The method for producing oil-containing granules according to claim 4, wherein the spraying of the emulsified oil is performed under hot air supply.