JP2001062278A - Rolling granulation method for powder and granular material and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently granulate while preventing the release of the vapor to be used and preventing the splashing of powder and granular materials by blowing a specific amount of superheated vapor to the powder and granular materials in a hermetic state, bring the vapor into contact with the material during a specified time and superheating the powder and granular materials to a specific temperature, thereby agitating and rolling the powder and granular materials. SOLUTION: Powder and granular materials are packed into an inlet 12 of a pressurization system paddle mixer 1 from an outlet 11 of an upper part pressure resistant type screw press 2. The powder and granular materials packed into the pressurization system paddle mixer 1 are successively transported to a falling port 19 from the input 12 in the mixer by rotation of plural sheets of the paddles 9 mounted apart spaced intervals at a revolving shaft 10. At this time, the heating vapor is blown at 1.2 to 3 kg/cm2 into the pressurization system paddle mixer 1 from vapor piping 23 and is brought into contact with the powder and granular materials for 2 to 6 minutes and to superheat the powder and granular materials to 70 to 130 deg.C, by which the powder and granular materials are rolled and granulated. The granulated powder and granular materials are packed from the falling port 19 into a receiving port 16 of a lower part resistant type screw press 3, are forcibly fed by feed vanes 15 and are transported outside from an ejection port 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for processing granules (such as granules having a single composition or granules having a mixed composition) such as various grains and foods. TECHNICAL FIELD The present invention relates to a rolling granulation method and a rolling granulation apparatus.

[0002]

2. Description of the Related Art In recent years, premixed products such as cereals and foods are predominantly premixed products, and the mixed composition thereof has many fine particles. In addition to causing contamination, there is a disadvantage that the yield of the premix product is reduced.

[0003] As a solution to the above-mentioned inconvenience, when manufacturing granular products such as cereals and foods, these granular materials are subjected to a granulation process in advance to prevent scattering of the granular materials. To prevent environmental pollution and maintain the yield of granular products.

[0004] For granulation of granules such as grains and foods,
Rolling granulation is often performed, and the principle of rolling granulation is generally the operation of rolling humidified powders and agglomerating them into spherical particles. It utilizes solid, liquid and gas interface energy as a basic force.

[0005] Conventionally, in the case of tumbling granulation of granules, steam used for granulation is released into the air and is not effectively utilized for granulation. There is a problem that the body tends to be scattered, the granulation processing capacity is small, the granulation running cost per unit of granule increases, and the yield of the granule product decreases.

Conventionally, many types of rolling granulators for granules are commercially available, such as a pan type, a drum type, a vibrating conveyor type, an extrusion granulation type and a compression granulation type. Since each type of device has an open structure, the steam used for granulation is released into the air and is sealed inside the device and cannot be used effectively for granulation. The degree to which the particles are scattered is strong, and the processing capacity of the conventional apparatus is small, and the processing capacity per apparatus is 20 to 30 t / h.
However, there is no apparatus having the above, and there is a problem that the granulating running cost of the granular material per unit increases, and the yield of the granular product decreases.

[0007] In addition, a conventional rolling granulator for granules includes:
In many cases, the setting of steam pressure, superheating temperature and contact time cannot be changed, and the shape of the granules of the granules cannot be freely selected, and the granules having a uniform composition are difficult to granulate.
In addition, because it is difficult to vary the moisture content of the granular material according to the product, there is also a defect that the final moisture of the granular product cannot be controlled to the minimum using the retained moisture of the granular material, There was also a problem that it was not possible to produce high-quality granular products.

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to the use of tumbling granulation of granules such as cereals and foods by placing the granules in a closed state and granulating the granules. The purpose of this method is to prevent the release of steam and to prevent the particles from scattering, thereby efficiently granulating the particles (increase in volume ratio by 200 to 500%) and increasing the granulation processing capacity. It is an object to reduce the running cost of granulating granules by increasing the scale, and to improve the yield of granulated products.

[0009] The present invention also provides a pressure-type paddle-type mixer connected to a pressure-resistant screw press to completely seal the inside of a rolling granulation apparatus system, thereby producing granules such as grains and foods. By effectively preventing the release of steam used for granules and making effective use of the granules, the granules such as cereals and foods are not scattered, and the processing capacity of the equipment is increased, so that the granules per unit can be reduced. It is an object of the present invention to reduce the running cost of granulation and improve the yield of granular products.

[0010] Further, the present invention is to easily change the pressure of steam, the superheating temperature and the contact time of the above-mentioned tumbling granulator to modify the powdery and granular material of uniform composition and uniform shape. By simply granulating without the need for granulation, and by easily changing the water content of the granular material according to the product and controlling the moisture content of the granular product, a high-quality granular product can be obtained. The purpose is to manufacture.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a method of tumbling and granulating a granular material, wherein superheated steam is blown into a sealed granular material at a rate of 1.2 to 3 kg / cm ² to form a powder. It is characterized in that granules are granulated by contacting them for 6 minutes, heating the granules to 70 to 130 ° C., stirring and rolling the granules.

[0012] The present invention also relates to a rolling granulator for powdery and granular materials, comprising a pressure-type paddle-type mixer in which pressure-resistant screw presses are connected to the upper and lower sides of a pressure-type paddle-type mixer. 1.2 to 3 kg / c of superheated steam
m ² and the powder and granules supplied into the pressurized paddle type mixer from the upper pressure-resistant screw press and 2 to 6
It is characterized in that it is contacted for a minute, heated to a temperature of 70 to 130 ° C. and stirred, and the granules are rolled and granulated.

Further, the present invention provides the above-mentioned rolling granulator for granules, wherein a pressurized paddle type mixer having a pressure-resistant screw press connected to the upper and lower parts according to the properties of the granules is provided. It is characterized in that a plurality of particles are arranged in parallel or in series to adjust the granulation state of the granular material in the pressurized paddle type mixer.

Further, the present invention provides a tumbling granulator for powders and granules as described above, wherein the starch in the powders and granules fed into the pressurized paddle type mixer is as low as 3% (weight) or less. It is characterized in that a liquid paste is sprayed into a pressurized paddle type mixer to roll the powder and granulate to granulate.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the method and apparatus for rolling granulation of a granular material according to the present invention will be described with reference to FIG. 1. An upper pressure-resistant type is provided on the upper side of a pressurized paddle type mixer 1 for granulating a granular material. A screw press 2 is continuously provided, and a lower pressure-resistant screw press 3 is provided below the pressurized paddle type mixer 1.
A feed blade 5 and a feed blade 15 rotated by a motor 4 and a motor 14 are provided inside the upper pressure-resistant screw press 2 and the lower pressure-resistant screw press 3.

An inlet 6 and an inlet 16 for powdery material are provided at the inlet side of the upper pressure-resistant screw press 2 and the lower pressure-resistant screw press 3, and a cone valve 8 is provided at the outlet side.
And the cone valve 18 are provided. The cone valve 8 and the cone valve 18 are connected to the hydraulic cylinder 7 and the hydraulic cylinder 17 to form a pressing mechanism, that is, a pressure-resistant seal is formed by the granular material to be transported. Material
It has a sealing function.

A rotary shaft 10 on which a plurality of paddles 9 are mounted at intervals is mounted inside the pressurized paddle type mixer 1, and the rotary shaft 10 is rotated by a pulley 13 to form a pressurized paddle type mixer. 1 is conveyed from the inlet 12 to the dropping port 19, and the pressurized paddle type mixer 1 is further connected to a steam pipe 23 provided with a steam depressurizing unit 22. The powder and granules are reduced to 70 to 1 by the steam supplied into the paddle type mixer 1.
It is configured to be heated to a temperature of 30 ° C., and the pressurized paddle type mixer 1 has a steam safety valve 24 and a pressure gauge 2.
0 is added.

The granules to be granulated are introduced into the upper pressure-resistant screw press 2 from the inlet 6 and the granules are fed to the cone valve 8 by the feed blade 5 rotated by the motor 4. , The cone valve 8 is connected to the hydraulic cylinder 7 to form a holding mechanism, and when the powder feeding force exceeds a certain level, the cone valve 8 is pressed and opened,
A predetermined amount of the granular material is charged from the outlet 11 of the upper pressure-resistant screw press 2 to the inlet 12 of the pressurized paddle type mixer 1.

The granules filled in the pressurized paddle type mixer 1 are dropped from the inlet 12 through the pressurized paddle type mixer 1 by the rotation of a plurality of paddles 9 attached to the rotating shaft 10 at intervals. In this case, heated steam is blown into the pressurized paddle type mixer 1 through the steam pipe 23 at a rate of 1.2 to 3 kg / cm ^{2 to be} brought into contact with the granular material for 2 to 6 minutes. The granules are rolled by heating the granules to a temperature of 70 to 130 ° C. to perform granulation (volume ratio increases by 200 to 500%).

The granulated powder is passed through a drop port 19 of the pressurized paddle type mixer 1 to a lower pressure-resistant screw press 3.
The powder and granular material are fed by the feed blades 15 rotated by the motor 14,
The valve 18 is connected to the hydraulic cylinder 17 to form a holding mechanism. When the pressure of the granular material exceeds a certain level, the cone valve 18 is pressed and opened, and a predetermined amount of the granular material is moved downward. Exit 21 of pressure-resistant screw press 3
Transfer to outside and store.

At the same time, the steam used for granulating the granules is liquefied and drained as a drain to the bottom of the pressurized paddle type mixer 1 so that the steam does not come into contact with the granulated granules. Dispose of it more quickly outside.

It is supplied to the pressurized paddle type mixer 1.
1.2 to 3 kg / cm of heated steam ^Two(Overheating temperature 15
0 to 230 ° C), and the steam is 1.2 kg /
cm^TwoIf it is less than this, drain adhesion to the granular material increases, and
In addition, instantaneous re-evaporation immediately after discharge
It is not suitable because the powder property deteriorates.
g / cm^TwoIf the pressure exceeds, the pressure resistance of the device is further required
Not only does the equipment cost increase, but
It is unsuitable because it agglomerates in a pack.

The contact time between the granular material and the heated steam in the pressurized paddle type mixer 1 must be 2 to 6 minutes, and if it is less than 2 minutes, the granulation effect by the steam becomes insufficient, so that it is inappropriate. In addition, if it exceeds 6 minutes, excessive drain adheres to the granular material, stickiness occurs, and the powder property deteriorates, which is not suitable.

The heating temperature of the granular material in the pressurized paddle type mixer 1 must be 70 to 130 ° C. If it is lower than 70 ° C., the heating becomes insufficient and the granulating effect is deteriorated, so that it is inappropriate. On the other hand, if the temperature exceeds 130 ° C., heat is lost to the composition of the powder and the composition of the powder is denatured, which is not suitable.

The pressurized paddle type mixer 1 has a diameter of 500 to 3000 mm and a length of 3500 to 60000 m.
m, and the rotation speed of the rotating shaft 10 on which a plurality of paddles 9 are mounted at intervals is 1.2 to 3.
0 m / min is appropriate, and the diameter of the upper pressure-resistant screw press 2 and the lower pressure-resistant screw press 3 communicating with the pressure type paddle type mixer 1 is 150 to 300.
mm and a length of 2,000 mm to 6000 mm, and the rotation speed of the feed blades 5 and 15 is 30 to 60 r /
min is appropriate.

The rolling granulation of the granules is carried out by mounting a plurality of paddles 9 on the rotating shaft 10 and a pressure-type paddle-type mixer 1 in which pressure-resistant screw presses 2 and 3 are connected. It is most suitable to use, but besides this, containers or devices such as paddle mixers, ribbon mixers, drum mixers, etc. are in a sealed state, Any material may be used as long as it has a mechanism capable of stirring the powder and granules.

The cone valve 8 and the cone valve 18 are connected to a hydraulic cylinder 7 and a hydraulic cylinder 17 which are operated by a hydraulic device 25. Instead of the hydraulic cylinder 7 and the hydraulic cylinder 17, an air cylinder or the like is used. A mechanical spring mechanism (not shown) may be used to adjust the amount of powder to be pumped.

The pressurized paddle type mixer 1 is optimally connected to an upper pressure-resistant screw press 2 and a lower pressure-resistant screw press 3, but other than this, a compression rotary valve and a piston reciprocating valve can be used. Any material may be used as long as it has a mechanism capable of inflow and outflow of the powder or the like and maintaining a sealed state in the pressurized paddle type mixer 1.

The supply amount of the above-mentioned granulation steam, the contact time between the granules and the steam, the granulation temperature for the granules, the shape of the pressurized paddle type mixer 1, the shape and number of the paddles 9, and the number of the paddles 9 Conditions such as the rotation speed of the attached rotating shaft 10, the shapes of the upper pressure-resistant screw press 2 and the lower pressure-resistant screw press 3, the pitch and shape of the feed blades 5 and 15, the rotation speed of the feed blades 5 and 15, and the like are as follows. What is necessary is just to determine suitably according to the kind of a granular material, the granulation purpose, etc.

The powder and granules are mixed with a pressurized paddle type mixer 1
Before the granulation in (during idle operation before the start of the granulation process), heating steam is blown into the pressurized paddle type mixer 1 in advance and preheated, and the inner surface and the paddle 9 of the pressurized paddle type mixer 1 are preliminarily heated.
Is adjusted to a temperature suitable for the granulation treatment, and the steam drain used in the granulation and remaining in the pressurized paddle type mixer 1 is dried to prevent the wetting of the granules, thereby forming the granules. The grain efficiency and the operating efficiency may be increased. In this case, the above-mentioned cone valve 8 and cone valve 18 allow the upper pressure-resistant screw press 2 and the lower pressure-resistant screw press 2 to operate.
By closing the press 3, the pressurized paddle type mixer 1 may be closed.

Depending on the type and amount of the granules to be granulated, the amount supplied, the purpose of granulation, the granulation conditions, etc., a pressurized paddle having an upper pressure-resistant screw press 2 and a lower pressure-resistant screw press 3 connected in series. By arranging a plurality of type mixers 1 in parallel or in series, each pressurized paddle type mixer 3
The optimal granulation of the granules may be performed by adjusting the granulation conditions of the granules inside.

When the amount of starch in the granular material supplied to the pressurized paddle type mixer 3 exceeds 3% (weight), the granular material may be granulated only by the steam as described above. When the granule is granulated only by steam when the starch in the granule is 3% (weight) or less, rolling granulation of the granule of uniform composition and uniform shape is performed. In this case, it is not possible to produce a high-quality product by spraying the liquid paste into the pressurized paddle type mixer 3 and rolling the granules to granulate. I just need.

[0033]

EXAMPLE 1 2 kg / cm 2 of saturated steam was introduced into a pressurized paddle type mixer having a structure as shown in FIG. 1 in which an upper pressure-resistant screw press and a lower pressure-resistant screw press having the following specifications were connected. ^The inside of the pressurized paddle type mixer was preheated to 120 ° C. by blowing under the conditions of ² .

(1) Pressurized paddle type mixer outer diameter 270 mm, length 1500 mm, total volume 80 L, effective 50 L motor 0.75 kW × (0 to 10 r / m), paddle height 20 mm × length 80 mm, 30 sheets, pitch 50mm receiving port 150mm, falling port 150mm, (2) Upper pressure-resistant screw press (same for lower pressure-resistant screw press) Outer diameter 100mm, length 1200mm, motor 11kw x 1-60r / m, feed blade variable pitch ( 100 ~ 50P) Inlet 150mm, Outlet 150mm,

A 4% (by weight) starch-filled mash filled (150 kg / h) was fed into the pressurized paddle type mixer via the upper pressure-resistant screw press from the charging port. The mash granulation process is performed by changing the amount of steam supplied into the pressurized paddle type mixer, the contact time between the mash and the steam, and the granulation temperature of the mash as described below. The state of granulation of the mash to be carried out was examined.

The mash filling rate 10% 30% 40% 50% 70% vapor supply pressure 0.5 kg / cm ² FAILURE FAILURE failure 1.5 kg / cm ² Good Good Excellent Excellent Excellent contact time granulating temperature for 2 minutes 70 ° C. defective Defective Defective Defective Defective 4 minutes 70 ° C Defective Defective Fairly good Fairly good 3 minutes 100 ° C Good Good Good Good Good 3 minutes 120 ° C Good Excellent Excellent Excellent Evaluation for 400% increase

[0037]

Embodiment 2 A liquid glue supply pipe was connected to a pressurized paddle-type mixer in which an upper pressure-resistant screw press and a lower pressure-resistant screw press shown in Example 1 were connected, and the inside of the pressurized paddle-type mixer was saturated. 2.0 kg of steam
/ Cm ² to preheat the inside of the pressurized paddle type mixer to 120 ° C.

A mash filled with starch (150 kg / h) containing 2% (by weight) of starch is fed into a pressurized paddle type mixer through an upper pressure-resistant screw press, and the filling rate of the mash The mash granulation process is performed by changing the amount of steam supplied into the pressurized paddle type mixer, the contact time between the mash and the steam, the mash granulation temperature, and the amount of liquid paste (wheat starch) sprayed as follows. Do
The state of granulation of the mash carried out from the lower pressure-resistant supply feeder was examined.

Mash filling rate 10% 30% 40% 50% 70% Steam supply pressure 0.5kg / cm ² defective defective defective defective defective 1.5kg / cm ² good excellent excellent excellent contact time Granulation temperature 2 minutes 70 ° C defective Defective Defective Defective Defective 4 minutes 70 ° C Defective Defective Slightly fair Slightly good 3 minutes 100 ° C Good Good Good Good Good Good 3 minutes 120 ° C Good Excellent Excellent Excellent Excellent 5kg / h wheat starch spray amount Bad defective Bad defective 15kg / h Good Good Excellent Excellent Excellent * Excellent, good, slightly good, and bad are evaluated for 400% increase in powder volume ratio.

[0040]

According to the present invention, the granules can be efficiently and easily granulated in a volume ratio of 200 to 500% without denaturing the components of the granules such as grains and foods.
The loss of steam used for granulation is reduced to 1/4 of that of the conventional device.
１ ／, the scattering degree of the granular material is reduced to 1/10 to 1/15 compared with the conventional apparatus, and the processing capacity per apparatus is 20 to 30 t.
/ H can be increased 10 to 20 times as compared with the conventional apparatus.
The cost can be greatly reduced to 1/3 to 1/2, and there is an advantage that the yield of the granular product can be increased to 1.2 to 1.4 times.

Further, according to the present invention, the granulation shape of the granules can be freely selected to granulate the granules having a uniform composition and a uniform shape. There is an excellent advantage that the final moisture of the granular product can be controlled to the minimum by varying the moisture depending on the product, and a high quality granular product can be manufactured.

Further, according to the present invention, it is possible to discharge the powder and granules as quickly as possible while minimizing the contact with the steam drain, and to reduce the water content of the powder and granules by 5 to 10%. It has the advantage of preventing sticky body.

Further, according to the present invention, there is provided a pressurized paddle type mixer provided with a pressure-resistant screw press in accordance with the type and supply amount of granules to be granulated, the purpose of granulation, granulation conditions, and the like. By arranging more than one machine in parallel or in series, adjusting the powder supply speed, steam supply conditions to the powder, contact residence time and temperature, etc. It is possible to obtain high-quality powder.

Further, according to the present invention, even if the starch content in the granules is 3% (weight) or less, the liquid paste is sprayed together with the steam to form the granules having a uniform composition and a uniform shape. Can be rolled and granulated, and there is an effect that a high-quality granular product can be manufactured for any granular material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of a rolling granulator for granules provided with a pressurized paddle type mixer for tumbling granules of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressurized paddle type mixer 2 Upper pressure resistant screw press 3 Lower pressure resistant screw press 4 Motor 5 Feeding blade 6 Input port 7 Hydraulic cylinder 8 Cone valve 9 Paddle 10 Rotary shaft 11 Outlet 12 Receptacle 13 Pulley 14 Motor 15 Feed blade 16 Inlet 17 Hydraulic cylinder 18 Cone valve Steam drain discharge pipe 19 Drop outlet 20 Pressure gauge 21 Transport outlet 22 Steam decompression unit 23 Steam piping 24 Steam safety valve 25 Hydraulic device 26 Liquid glue supply pipe

Claims (4)

[Claims] 1. A superheated steam is applied to a closed granular material for 1.2 hours.
With contacting ~3kg / cm ² blown in 2-6 minutes, by rolling with stirring by heating the granules to 70 to 130 ° C., powder particles, which comprises granulating the granular material Rolling granulation method of the body. 2. A pressure-resistant screw press is connected to the upper and lower sides of the pressurized paddle type mixer, and superheated steam is supplied to the pressurized paddle type mixer in an amount of 1.2 to 3 kg / cm ^2.
Blow and contact the powder and granules supplied from the pressure-resistant screw press on the upper side into the pressurized paddle type mixer for 2 to 6 minutes, heat to 70 to 130 ° C and stir to roll the powder and granules A rolling granulator for granules, characterized in that the granulation is carried out. 3. A plurality of pressurized paddle type mixers each having a pressure-sensitive screw press connected in an upper part and a lower part arranged in parallel or in series according to the properties of the powdery and granular materials, and the powdery particles in the pressurized paddle type mixer are arranged. The rolling granulator according to claim 2, wherein the granulation state of the body is adjusted. 4. When the amount of starch in the granular material supplied to the pressurized paddle type mixer is as small as 3% (weight) or less, the liquid paste is sprayed into the pressurized paddle type mixer to remove the granular material. The rolling granulator for powdery granules according to claim 2 or 3, wherein the granulation is performed by rolling.