JPS5848208B2 - Method for producing granular composition - Google Patents

Description

[Detailed Description of the Invention] The present invention is based on the granulation of a composite material that is rich in deodorizing, sterilizing, and gas adsorbing properties obtained from fermented vegetable matter, that is, humus mud, which has been deposited in water such as the bottom of a seabed for many years. Regarding how to.

The term "humus" is commonly used in soil science,
Sometimes called soil organic matter.

This is because plant remains are decomposed by the action of microorganisms while deposited on the water bottom or in the soil for many years, and the decomposed products react with each other and condensation and agglomeration proceed. Soil with a complex composition is gradually formed due to the mixture of

This is called "humus soil," but in this specification it will be called "humus mud" because it has a lot of moisture and is muddy.

The applicant previously filed a patent application for the above-mentioned composition in Japanese Patent Application No. 55-94563, but this composition can be used in various forms as fine powder, water extract, or granules depending on the application. It is provided.

The present invention relates to a method for producing granules therein.

Although there are various methods for granulating powder, industrial granulation methods are limited by the physical and chemical properties of the powder, the purpose of granulation, and the use of the granulated product.

The present inventors have conducted various studies on methods for producing granular products with high hardness without adding any particular binder when granulating humus mud. The present invention was achieved by discovering that kneading significantly increases the caking property.

Humic mud has a water content of 90% or more when dug up, but the water content is reduced to 70% by draining and becomes the starting material for the granulation process.

If the water content is less than 60 φ, granulation will not be successful, but in this case, it is sufficient to add water to make the granules about 70 φ.

Moreover, if the moisture content exceeds 80%, the granulation time becomes unnecessarily long, which is not economical.

The vegetable humus mud according to the present invention has a moisture content of 90 parts or more when dug up, and when it is drained and piled up in the open or indoors, the moisture gradually evaporates and becomes dry.

Its solidified state is similar to that of ordinary clay soil, and if you tap it lightly, it will crumble into irregular pieces.

Therefore, it is impossible to obtain a hard solidified product from this.

In the process of developing uses for humus mud, the inventors of the present application have investigated various methods of solidifying it without using a binder and molding it into something with a high degree of hardness that does not break easily.

Although it is possible to obtain any desired shape by press working, which is usually carried out, the hardness is low and it collapses in a short time when placed in water.

The present invention was ultimately successful by using a fluidized mixing type granulator, but the moisture content of the feed material, the humidity and temperature inside the granulation tank are the key points in the granulation conditions, and it was difficult to overcome these conditions. If it deviates even at any time, the target granulation cannot be achieved.

The reason why the granules produced by the production method of the present invention are so hard that they do not crumble even when immersed in water is thought to be due to the caking properties of the plant-derived components contained in the humus mud itself. The mud itself showed almost no caking properties in S, and the reason why various granulation methods were tried but did not work was thought to be because the caking properties of the humic mud could not be brought out properly. It will be done.

In a fluidized mixing type granulator, mixing, mixing, shearing,
Only by being subjected to the effects of rolling, etc., the caking properties of the humus mud components increased, creating granules with high hardness and uniform particle size.

This is completely unexpected, and the method of the present invention is a humus slurry granulation method that was made possible for the first time by a special combination of a granulator and granulation conditions.

As the granulator, a so-called fluidized mixing type granulator is preferable.

That is, humus mud having an appropriate moisture content is mixed, kneaded, sheared, rolled, etc. by rotating blades in a cylindrical granulation tank.

The humus mud starts out crumbly, then gradually becomes like kneaded clay, and as it continues to be stirred, it naturally becomes granular with uniform particle size.

The granules thus produced are then dried in a hot air dryer to form a product.

Granules with the highest hardness are obtained by drying to a moisture content of around 15φ, and the values shown in Table 1 are obtained.

Table l Compressive strength (unit: kg/average of 50 pieces) 20°G 1.016 50°C (2h) 1.017 100’C (2h) 1.144 The measurement method is based on Kiya type hardness tester 1600-B.

This material does not disintegrate even when immersed in hot or cold water for a long period of time.

This is an extremely useful performance in practice. As is clear from the history of humus mud, the plant matter contained in humus mud is extremely complex and diverse, and it is impossible to list them all, but the substances that cause stickiness include polysaccharides and Possible sources include decomposition products such as lignin and tannins, and metabolic products of certain microorganisms.

Although the mechanism by which the caking property is increased and hard granules are produced by the method of the present invention is not yet well understood, the present invention provides a method for granulating this humic mud by increasing the caking property by a certain amount. This was accomplished by discovering granulation conditions that increase the

Since the temperature inside the granulation tank rises due to stirring, there is no need to heat it at all in the summer, but in other seasons it may be preferable to heat it to some extent.

Regarding the humidity in the granulation tank, high humidity during summer, rainy season, etc. is most preferable, and it is necessary to humidify rice fields where the temperature is low and the atmosphere is dry in winter.

If humidification is not performed, granulation may not occur and the product may turn into powder.

Example I 150 kg of humus mud with a moisture content of 70φ was charged into a mixed flow type granulator (cylindrical diameter: 120 CrrL, height: 45 CrrL) 22
Stirred at ~24 rpm.

The room temperature was 30 to 25°C, and the humidity in the granulation tank was 85%.

After 20 hours of stirring and kneading, the humus mud became hard granules with uniform particle sizes as shown below.

Next, the product was dried for 2 hours at 60° C. in a hot air dryer, and the results were as follows.

Particle size distribution (inch mesh) 8 mesh on 0.820! ) 8~9 mesh 12.25// 9~10 // 82.78ll10
~1 2 〃 31 3ll1 2~
16 // 1.01 // 16 ~
32 〃 0.01//Compressive strength (unit: kg/piece, average value of 50 pieces) 20'C
I. 016 506C (2 hours) 1.017 Example ■ 100 kg of humus mud with a moisture content of 75φ was charged into a mixed flow type granulator (same as in Example) and stirred at 22 to 24 rpm.

The room temperature was 10 to 5°C. Hot water of 50°C was passed through the jacket of the granulation tank, and the humidity inside the granulation tank was maintained at 80° C. or higher using a humidifier.

After 23 hours of stirring, the humus mud became granules with an average particle size of 4 to 5 mm.

The compressive strength of the granules was almost the same as in Example I.

Cold water, hot water (60℃) and steam (1 }cy/c
I? The degree of swelling was measured after immersing each sample in LQ) for 2 hours, but no swelling was observed in any of them.

Claims (1)

[Scope of Claims] 1. When granulating vegetable humus mud, the moisture content is first adjusted to 60 to 80 parts, and the plant matter contained in the humus mud or itself is granulated in an atmosphere with a humidity of 65 parts or more. A granulation method characterized by stirring and kneading using caking properties. 2. A granulation method according to claim 1, characterized in that the above-mentioned stirring and kneading is performed using a bladed stirrer in order to increase the caking properties of the humus mud.