JPS6369529A - Horizontal cylinder type agitating, crushing and drying device - Google Patents

Abstract

PURPOSE:To prevent the deterioration of heat conductivity caused by the sticking of a material to a clearance part by restraining the clearance between the top end of heating agitator blades rotatably stretched to the inner wall part of a horizontal cylinder type vessel and inner wall of the vessel within 2mm. CONSTITUTION:The material stuck to the inner wall of the horizontal cylinder type vessel 1 is scraped off by the agitator blades 21 and agitator arms 22, and then mixed and crushed by mixing and crushing blades 18. And the clearances between an inner peripheral wall and the agitator blades 21 and between inner side walls and the agitator arms 22 are restrained in about 0.5-2mm to lessen the amount of the material stuck to the inner peripheral wall and inner side walls to reduce the resistance against heat conduction as small as possible. By constructing in such a way that the number of revolutions of the agitator blades 21 is able to be changed to max. 30r.p.m. according to the state of material, the fluctuation of the resistance against heat conduction in the interval between two scraping actions is negligible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for mixing, stirring, crushing, solid-liquid extraction, and
This invention relates to a horizontal cylindrical stirring, crushing and drying device that performs operations such as concentration reaction, crystallization, drying, and granulation of liquids in a batch manner.

[Prior art and its problems]

The heat transfer efficiency in a cylindrical stirring, crushing, and drying device improves as the clearance between the inner circumferential wall of the cylinder and the tip of the stirring blade and the tip of the stirring arm that makes sliding contact with the side surface of the horizontal cylinder decreases. but,
Manufacturing accuracy, expansion during heating.

Due to problems such as deformation of the material due to the stirring load, large equipment generally has a clearance of several seconds, and equipment without special consideration has a clearance of 10+ seconds or more, and the material stagnates in that area, which increases heat transfer resistance and Since overheating of the parts occurs, the heating temperature must also be lowered, and therefore there are also pressure limitations.

[Means for solving problems]

In order to solve the problems in the above-mentioned conventional cylindrical stirring crushing drying apparatus, the present invention has obtained the following findings. In other words, although it is ideal that the clearance space is small,
The stirring blade, stirring arm, and cylindrical container are selected by taking into consideration the ease of actual manufacturing and equipment operation, and comprehensively judging the material and plate thickness, processing accuracy and heating capacity, partial material damage due to overheating, etc. It was concluded that the most practical clearance with the inner wall is approximately 0.5 mm to 2W. In fact, for liquid and free-flowing powder and granular materials, the heat transfer resistance of the material in the clearance area can be ignored at temperatures below 300 mm. In addition, with paste-like materials, a decrease in the heat transfer coefficient was observed when the clearance was large, but depending on the angle of the tip of the scraping part and the shape of the rear part of the scraping blade, peeling of the material in the clearance part was observed, resulting in a reduction in the agitating quality. By selecting the appropriate rotation speed, if the clearance is 1 layer - then the clearance will be 0.
Compared to the ideal state, the decline in performance was only about 15%.

Based on the above findings, the present invention has been developed to increase the clearance between the tip of the stirring blade and the tip of the stirring arm and the V4 wall inside the horizontal cylindrical container by 2.
By adopting a configuration in which the diameter is less than 1, preferably about 0.5, the OT pupil effect, which is caused by the reduction in heat transfer efficiency due to materials adhering to the inner circumferential wall of the horizontal cylindrical container, the stirring material, the stirring arm, and the clearance part, is significantly reduced. 1. We succeeded in keeping the decrease in usage of the drying equipment as small as possible.

[Explanation of Examples]

Two embodiments of the apparatus of the present invention will be described below.

In the drawing.

1. Horizontal cylindrical container. In Fig. 1, g is its inclination angle.

2: Bearing of the support shaft 3 of the horizontal cylindrical container l; 3: A stirring shaft provided on the container center axis 2G of the horizontal cylindrical container l.

4: [Fff 21 c7) WIA'J21 m,
5: A rotating mechanism having stirring blades 21 at the tips of stirring arms 22 fixed to both sides of the stirring shaft, and equipped with a crusher 6 inside.

6: In the crusher, add mixed crusher i18 to the crusher shaft 15. This crushing Ja6 rotates inside the stirring i21 to mix and crush the materials.

7: One rotation machine Jl with crusher shaft 15 bearing! ! It can be attached to 5.

8: Transmission pulley or gear attached to the crusher shaft 15, 9: Transmission pulley or gear 8.10 transmission means, 10: Transmission pulley or gear attached to the drive shaft 11 of the crusher drive device 12, ll: The above Drive shaft 12: Drive device 13 of crusher 6: Transmission pulley or gears 8, 10, and transmission THJ mechanism 9 are accommodated in the space provided in the JQ stirring arm 22 to prevent intrusion of materials and lubricating oil. Sealed to prevent leakage.

14: Bearing of drive shaft 11 15: As described above, crusher shaft 16: Supply path for supplying a medium for granulating various materials mixed and crushed in crushing a6. However, this medium supply is not directly related to the gist of the present invention.

17: Similarly, nozzle hole of the medium nozzle pipe 18: Mixed crushed material 18a of the crushing blade 6: Crushing plate 19: Medium nozzle pipe 20: Central axis of horizontal cylindrical container l 21: Stirring blade whose tip is oriented in the direction of rotation write a servant letter to

21a two hollow parts 22: Stirring arm 23: Product discharge port 24: Knife Next, the 4I formation process will be explained.

Rotation 4I in horizontal cylindrical container l! ms is placed.

The rotation mechanism 5 is provided so as to be able to rotate concentrically within the horizontal cylindrical container 1 about the stirring shaft 3 by means of a bearing 2.

This rotating mechanism 5 has a frame shape, and has a Wl stirring gR
21 and stirring arms 22 on both sides (FIG. 6). On the other hand, a crushing rod 6 is provided inside the stirring blade 21 and supported by the rotating mechanism 5. This crusher 6 revolves with the rotation of the stirring blades, and is provided with its own drive mechanism so that it can rotate at any rotational speed and direction.

A space 13 is provided inside the stirring arm 22 on one side,
A transmission mechanism 8.9.10 is housed in this.

In the apparatus having the above structure, the material adhering to the inner peripheral wall and side wall of the horizontal cylindrical container 1 is the stirring blade 21 and the stirring arm 22.
The mixed crushed material 18 is used to scrape off and mix and crush the mixed crushed material 18. Moreover, the clearance between the inner peripheral wall and the inner wall and the stirring blade and the stirring arm is set to about 0.5 mm to 2 mm to minimize the amount of material adhering to the inner peripheral wall and the inner wall.
This is to prevent the AI force from becoming a resistance to heat transfer. In addition, the rotation speed of the stirring blade can be up to 3 Or, p,
If the coating was allowed to be scraped down to a depth of 1.5 m, the heat transfer resistance caused by the adhesion between being scraped off and then being thickened was negligible.

Furthermore, if the knife 24 is detachably attached to the stirring medium 21 as shown in FIG. 2, the material adhering to the inner wall of the model cylindrical container l can be scraped off with even greater precision.

In addition, the stirring blade 21 has a mechanism in which a heating medium flows into its hollow portion 21'a, so that the heat transfer from the stirring blade can be controlled by taking into account the amount of heat transferred from the inner circumferential wall. There is.

Further, although it is generally said that two stirring blades are provided every 180° as shown in FIG. 5 (2), three stirring blades may be provided every 120° as shown in FIG.

Furthermore, as shown in Figure 2, the tip of the stirring blade 21 has an acute angle so that it scrapes the material without resistance, and the inside is shaped like an airplane wing so that the scraped material can be dug up without resistance. On the peripheral wall side, a vk retraction angle O is provided on the opposite side of the rotation direction to reduce frictional resistance. The structure is such that angles 1 and 0 point inward by 5 degrees or more.

Furthermore, the tip of the stirring arm 22 is made at an acute angle so that #4 can be scraped off the side wall material of the horizontal cylindrical container l without resistance, and the side surface of the stirring arm 22 is set at a receding angle θ' with respect to the side wall of the container l.
Only the side opposite to the direction of rotation is tilted inward. This receding angle θ' is usually 1 to 26.

Further, the mixed crushed material 18 is attached at right angles to the crusher shaft 15. Further, a thin crushing plate 18-a is attached if necessary. (Fig. 4) Furthermore, if we add four twists to this crushing plate 18a.

When the material is discharged, the material flows smoothly into the discharge port 23 and is discharged. This twist corresponds to the twisting direction of the screw of a screw conveyor.

〔Effect of the invention〕

Stirring blade 21. Although the clearance between the stirring arm 22 and the horizontal cylindrical container l is set to 2i+■ or less, preferably about 0.5 mm, it can be manufactured without requiring much precision.
However, the heat transfer efficiency does not decrease.

Therefore, an overall economically efficient agitation crushing drying system is obtained.

[Brief explanation of the drawing]

Figure 1: Cross-sectional view of the device of the present invention Figure 2: Side view of 攬袢UN 21 tjS3 figure: Plan view of stirring arm 22 Figure 4: Front view of mixed crushing i18 Figure 5 ■■: Installation of the stirring element is shown as an example. Figure 6 Front view of two-rotation mechanism 1: Horizontal cylindrical container 2: Bearing 3: Stirring shaft 4: Drive? 1 doubt 5: Rotation mechanism 6: Crusher 7: Crusher shaft 8: Transmission pulley or gear 9: Transmission means 10: Transmission pulley or gear 11:! I-driving wheel 12: Drive device 13: Blank space 14: @1 Uke 15: Crusher shaft 16: Supply route 17: Nozzle hole 18: Mixed crushing χ 19: Nozzle pipe 20: Central axis line 21: Stirring blade 22: Stirring arm 23: Product discharge port 24 Nina f. Figure 3 ■ Figure 2 ■ ■ Figure 5 Figure 4 Figure 6 December 1, 1986

Claims (13)

[Claims] (1) A wall-heated horizontal cylindrical container for receiving the material to be handled, and a rotatable heating stirring blade installed on the inner circumferential wall area concentrically with respect to the central axis and extending to the inner wall area of the container; A mixing and crushing blade comprising a means that is rotatably installed eccentrically with respect to the axis of the container and is rotatable in a free rotational direction and at a rotation speed different from that of the stirring blade while rotating together with the stirring blade. A horizontal cylindrical stirring, crushing and drying device comprising a cylindrical stirring, mixing, crushing and heating device, characterized in that the clearance between the tip of the stirring blade and the inner circumferential wall of the horizontal cylindrical container is within 2 mm, preferably about 0.5 mm. (2) The device according to claim 1, wherein the clearance between the stirring arm and the side surface of the horizontal cylindrical container 1 is within 2 mm, preferably about 0.5 mm. (3) Any one of Claims 1 and 2, in which a scraping knife is removably attached to the tip of the stirring blade and the arm.
The device described in. (4) The rotation speed of the stirring blade is 30 r. p. m. Any one of claims 1, 2, and 3 that can be freely changed below.
The device described in. (5) The device according to any one of claims 1, 2, 3, and 4, wherein the inside of the stirring blade cross section is hollow and a heating medium can pass therethrough. (6) There are two stirring blades or one stirring blade every 180° on the stirring blade axis.
6. A device according to any one of claims 1 to 5, which is arranged radially in three pieces at every 20°. (7) The shape of the stirring blade is such that the tip in the direction of rotation is sharply pointed and the inside is streamlined like an airplane wing.
Apparatus according to any one of Clause 6. (8) The device according to any one of claims 1 to 7, wherein the stirring blade peripheral wall side has a receding angle θ as shown in FIG. 2, and this angle is equal to or larger than 5°. (9) The shape of the stirring arm is such that the tip in the rotation direction is sharp, and the side opposite to the rotation direction of the inner surface of the horizontal cylindrical container 1 has a receding angle θ' that is inclined inward. 2
9. The device according to any one of claims 1 to 8, which is approximately .degree. (10) The device according to any one of claims 1 to 9, wherein the rotating mixing and crushing machine is installed inside the stirring blade and is driven via a transmission mechanism built in the stirring arm. (11) The mixing crusher is an apparatus according to any one of claims 1 to 10, wherein a large number of mixed crushed materials 18 are attached perpendicularly to the crusher shaft 15. (12) The device according to any one of claims 1 to 10, wherein a crushing plate 18c is attached to the mixing crushing blade 18. (13) The device according to any one of claims 1 to 12, wherein the crushing plate 18a is twisted so that the material inside is crushed and conveyed toward the discharge port at the same time.