JPS5937060B2 - Powder granulation method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for granulating powder.

In order to granulate powder into spherical particles with excellent solubility and dispersibility, it is generally said that a fluidized granulator is used.

This fluidized granulator consists of a main body, a raw material feed pipe, an air feed pipe, a binder feed pipe for water, etc., and a selective air draw pipe. A binder is supplied and air is introduced from below the raw material to granulate it, and the structure allows the optimum operating conditions to be selected according to the properties of the raw material and the desired particle size.

However, even if an attempt is made to fluidize a powder with a high fat content, such as egg yolk powder or a powder containing egg yolk, using a fluidized fluid granulator, the powder will become agglomerated immediately after the start of the granulation operation, resulting in the so-called The ``stairwell phenomenon'' occurs and the powder no longer flows.

Therefore, fluidized granulators are not suitable for granulating powders with poor fluidity.

The object of the present invention is to prepare egg yolk powder or powder containing egg yolk,
The object of the present invention is to provide a method for granulating such powders using a fluidized granulator, which has been considered unsuitable in the past.

Another object of the present invention is to provide a method for granulating egg yolk powder or powder containing egg yolk into particles with excellent solubility and dispersion.

According to the present invention, the above object of the present invention is to prepare egg yolk powder or powder containing egg yolk by a conventional method using a fluidized granulator after spraying a predetermined amount of water onto the powder while stirring. A method of granulating powder characterized by granulating it (this is achieved by this method).

The granulation method of the present invention having the above characteristics will be described in detail below based on its embodiments.

The egg yolk powder to be granulated in the present invention E is obtained by powdering the egg yolk liquid, such as the egg white liquid separated from the egg white liquid after breaking the egg, or the egg yolk liquid stored in a refrigerator, by a conventional method, for example, by spray drying. This is what I did.

Powder containing egg yolk refers to a powder made using egg yolk as a raw material and something other than egg yolk, for example, egg yolk powder mixed with powder such as egg white, soy protein, dextrin skimmed milk, etc. in an appropriate ratio. Examples include powder, but powder obtained by pre-mixing egg yolk liquid and other raw materials, such as egg white liquid and soy milk, and then drying and pulverizing the mixture is also exemplified as the target powder for granulation in the present invention.

In such a powder E containing egg yolk, the effect of the present invention is remarkable because the egg yolk content is high.
When granulation of powder of % or more is applied, it is effective.

In carrying out the present invention, first, the above-mentioned egg yolk powder or powder containing egg yolk is stirred and a predetermined amount of water is sprayed onto the powder.

The stirring of the powder and the spraying of water onto the powder are carried out using a stirrer and a sprayer under such conditions that no lumps of powder are formed and the powders form a weak bonding action, and a preferred stirrer is used for this purpose. An example of this is a whipper type stirrer, which sprays water while stirring at high speed.

In addition, the preferable amount of water to be sprayed at this time is about 7 to about 20 parts by weight per 100 parts by weight of egg yolk powder when egg yolk powder alone is used as the powder; When using flour (75 parts by weight of egg yolk, 25 parts by weight of egg white).

The amount is about 5 to 15 parts by weight per 100 parts by weight of powder, and when using other powders containing egg yolk (this is more important than the difference in the type of mixed powder and the content of egg yolk). However, it is generally selected in proportion to the egg yolk content within the range of about 3 to about 20 parts by weight based on 100 parts by weight of the powder.

If the amount of water sprayed to the powder is too small, the effect of adding water will be weakened, and the powder will easily form agglomerates during the fluidized granulation process (in this process, the powder will easily aggregate), and the spray 77
11 If the amount of water is excessive, the powder becomes sticky and granulation becomes difficult.

This sprayed hydration (the water used here is one that provides appropriate moisture to the powder, so it does not necessarily have to be fresh water, and a seasoning liquid seasoned with salt, soy sauce, etc. may also be used).

However, it is necessary to avoid substances that cause full-fledged bonding of powders, and usually clean water is used, or in other cases, a substance with a viscosity similar to that of clean water is used.

In addition, conditions for spraying power should be selected to produce a fine mist, otherwise the powder may become sticky or kneaded.

As described above, the granulation method of the present invention involves preliminarily spraying and adding water to egg yolk powder or a powder containing egg yolk, and then performing fluid granulation using a fluidized granulator. Fluid granulation is carried out while the mixture is not evaporated.

The fluidized granulation conditions at this time are not particularly different from normal conditions, and various binder liquids can be used, but the binder liquid used in the present invention is mainly whole egg liquid, starch An aqueous solution or the like is used.

According to the granulation method of the present invention such as slanting, the egg yolk powder or the powder containing egg yolk does not form into agglomerates during fluidized granulation, and is extremely effective. teeth,
Particles produced by other granulation methods, such as mixed granulation and rolling granulation, have higher solubility and dispersibility than those produced by other granulation methods.

In addition, according to the granulation method E of the present invention, a fluidized granulator can be used in a conventional manner (
Since it is used in this manner, it is possible to take advantage of the advantages of a fluidized granulator, such as the ability to change the width of the particle size distribution as necessary and to enable continuous granulation.

Examples of the present invention as well as comparative examples will be shown below.

Example 1 While stirring 1 kg of whole egg powder with a Hobart mixer, 130 ml of fresh water was sprayed with a sprayer.

Next, the water-sprayed whole egg powder was granulated by fluid granulation using a fluid granulation dryer manufactured by Okawara Corporation, using 400 g of whole egg liquid as a binder liquid.

As a result, the whole egg powder was not agglomerated during fluidized granulation, and the obtained particles were highly soluble and dispersible.

Example 2 Egg yolk powder was used instead of whole egg powder in Example 1, the amount of water (clean water) sprayed was 1601 Le, and a 2% starch aqueous solution was used as a binder liquid at 400 Le. ! The procedure was carried out in the same manner as in Example 1 except that 9 was used.

As a result, substantially the same results as in Example 1f were obtained.

Comparative Example Fluid granulation was carried out in the same manner as in Example 1 except that the spray hydration treatment in Example 1 was omitted.

As a result, the whole egg powder became agglomerated, and a phenomenon occurred in the blowhole, making it virtually impossible to perform fluidized granulation.

Claims (1)

[Claims] 1. Powder granulation characterized by stirring egg yolk powder or a powder containing egg yolk, spraying a predetermined amount of water on the powder E, and then granulating it by a conventional method using a fluidized granulator. Method.