JP2003112032A - Agitation type drying equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a agitation type drying equipment which prevents the lowering of agitation efficiency, of thermal conductivity and of drying efficiency by sticking of materials to be dried to the inner walls of a drier body (horizontal-laid cylindrical body), an agitator shaft (revolving shaft) and agitator arms (rods of agitator blade elements). SOLUTION: This material agitation type drying equipment has a horizontal rotary agitator 14 within the horizontal cylindrical body 12, in which the agitator blades 15 of the horizontal rotary agitator are formed by connecting a plurality of the agitator blade elements 18 having the rod-like sections 18a to the circumference of the revolving shaft 16. Rigid annular bodies 38a and 38A and chain-like annular bodies 39 and 39A are movably fitted to be attached to the revolving shaft 16 and the agitator blade element rod-like sections 18a respectively approximately along their respective axial directions.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is provided with a horizontal rotary stirrer inside a horizontal cylinder, and the stirrer blades of the horizontal rotary stirrer are connected with a plurality of stirrer blade elements each having a rod-shaped portion (arm portion) around a rotary shaft. The material agitation-type drying device formed by the above is particularly high in the liquid content of the material to be treated (dry material) whose stickiness tends to increase during the drying process, especially starch and sugar content whose stickiness is significantly increased. The present invention relates to a material agitation-type drying device suitable for those including.

[0002] A high liquid content means mainly a high content of hydrophilic liquid such as water or alcohol.

Here, the liquid-containing waste will be described as an example of the high liquid-containing substance, but the liquid-containing waste is not limited to this.

The liquid-containing waste includes fermented product waste liquor, livestock / poultry manure, food waste, okara, leftover food and other organic waste such as animal and plant residues, and excess sludge, digested sludge,
Examples thereof include dewatered sludge, pressurized floating scum, chemical sludge, pulp sludge, clay sludge, cement sludge, and other inorganic wastes such as inorganic wastes. Here, the animal and plant residue is a solid unnecessary substance related to an animal or a plant used as a raw material in the food, pharmaceutical, and fragrance manufacturing industries (edited by the Chemical Society of Japan, “Chemical Handbook, Applied Edition, Revised 3rd Edition”). (Sho 55-3-15) Maruzen, p1466
reference).

[0005]

2. Description of the Related Art Conventionally, liquid-containing wastes, especially organic wastes, need to be dried to a predetermined water content for the purpose of volume reduction and composting.

The inventors of the present invention have filed a prior application (Japanese Patent Application No. Hei 20) as a device for drying and stirring liquid-containing substances used in such a case.
01-206353: Not published at the time of application), the following structure is proposed.

"A drying device is provided with a rod-shaped or lump-shaped stirring medium which is placed inside a horizontally placed cylinder and is independently movable, and a horizontally rotating agitator. A plurality of agitating blades that are formed at a predetermined pitch and intersect each other and are capable of driving an agitating medium are provided, and heating means is provided respectively on the outer peripheral portion of the horizontal cylinder and / or inside the rotating shaft. When the drying device having the above-mentioned configuration is used for the drying treatment, there is a state in which it becomes very sticky in the course of reaching a predetermined water content (liquid content). In such a state, the object to be treated adheres to the inner wall of the dryer main body (horizontally placed cylinder), the stirring shaft (rotating shaft) and the stirring arm (rod-shaped portion of the stirring blade element), and the stirring efficiency decreases. At the same time, there is a problem in that the thermal conductivity also decreases and the drying efficiency decreases.

[0008]

DISCLOSURE OF THE INVENTION In the process of intensive development for solving the above-mentioned problems, the inventors of the present invention provided an annular body (ring body) with a rotating shaft of a stirring device and / or a stirring blade element rod portion ( The inventors have found that the above-mentioned problems can be solved by fitting in an arm portion) so as to be movable in the substantially axial direction, and have devised a material stirring type drying device having the following configuration.

A horizontal rotary stirrer is provided inside the horizontal cylinder.
The stirring blade of the horizontal rotary stirrer is a material stirring type drying device used for stirring a high-liquid content material, which is formed by connecting a plurality of stirring blade elements having at least a rod-shaped portion around the rotary shaft, And / or a rigid annular body and / or a chain annular body made of a rigid material is fitted to the stirring blade element rod-shaped portion so as to be movable substantially along respective axial directions.

With the above structure, the object to be dried is rotated by the disturbing movement accompanied by the rotation axis of the rigid annular body and / or the chain annular body and / or the rotation axis substantially along the axis of the stirring blade element rod portion. Adhesion to the shaft and the stirring blade arm is prevented, and when sticking is scraped off, the material to be dried is prevented from sticking / blowing on the rotating shaft of the stirrer and the stirring blade element rod. Therefore, the stirring efficiency is less likely to decrease, and as a result, the drying efficiency is also improved.

Further, in the above structure, if a stirring medium which can move independently is introduced into the inside of the horizontal cylinder, and the stirring medium is driven by the stirring blade, a rod-shaped or block-shaped stirring medium is formed. When the stirring medium is driven and disturbed by the stirring blade, in addition to the effect of preventing sticking / bloat on the rotating shaft of the stirring machine and the stirring blade arm of the object to be processed, the material to be dried on the inner wall surface of the horizontal cylinder is also processed. Adhesion is inhibited, and when adhered, it is scraped off, and the object to be treated does not adhere to the inner wall surface of the horizontal cylinder and adhere / expand. Therefore, the stirring efficiency and the drying efficiency are not further reduced.

[0012] When the present invention is applied to a drying device having a horizontal cylindrical body and / or a heating means on the inner peripheral portion of the rotary shaft, adhesion / bloat on the heat transfer surface is prevented, The improvement of heat transfer efficiency can be expected, and the effect of the present invention (improvement of drying efficiency) becomes remarkable.

According to the present invention, not only the drying efficiency but also the object to be treated having adhesiveness can be expected to be prevented from adhering to the stirrer and the enlargement of the object. Therefore, it can be applied not only as a drying device but also as a general kneading stirring device as in the following configurations.

A horizontal rotary stirrer is provided inside the horizontal cylinder.
The stirring blade of the horizontal rotary stirrer is a stirring device in which a plurality of stirring blade elements having at least a rod-shaped portion are connected around a rotation shaft, wherein a rigid material is provided on the rotation shaft and / or the stirring blade rod-shaped portion. The rigid ring-shaped body and / or the chain-shaped ring-shaped body made of are fitted so as to be movable substantially along the respective axial directions.

In the stirrer having the above-mentioned structure, further, an independently movable lumpy stirring medium is introduced into the inside of the horizontal cylinder, and the stirring medium is driven by the stirring blade. Characterize.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a material agitation type drying apparatus used for drying a high liquid content material of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the material agitation-type drying apparatus according to the present embodiment is provided with a horizontal rotary stirrer 14 inside a horizontal cylinder 12, and a horizontal impeller (stirring blade) 15 of the horizontal rotary stirrer 14 is provided with: , A rod-shaped part (arm part) around the rotary shaft 16
A plurality of stirring blade elements 18 including 18a and a tip paddle portion 18b are connected. Here, the rotary shaft (hollow shaft) 16 is a round pipe in the illustrated example, but it may be a square pipe (triangle / square / polygon in cross section). In addition, 16a is a bearing fitting part.

Further, in the present embodiment, from the viewpoints of stirring efficiency and discharge of the processed material, the stirring blade element 18 is a plate-shaped paddle portion (solid paddle) which also serves as a chamfered inner peripheral wall scraping member in the illustrated example.
18b is a rotary shaft 16 via an arm portion (bar-shaped portion) 18a.
It is connected to the.

The rod-shaped portion 18a is a round rod in the illustrated example, but may be a square rod, a flat rod, an angle, a channel or the like.

Further, instead of the plate-shaped paddle (solid paddle) 18b, a hollow blade (hollow paddle) having a rectangular or triangular cross section may be used. The pitch of the stirring blade element 18 varies depending on the capacity of the horizontal cylinder, but is about 15 to 30 cm.
And The stirring blade element 18 may be only the rod-shaped portion. In addition, in the illustrated example, the plate-shaped paddle portion 18b is provided in the horizontally placed cylindrical body 1
The upper part is inclined in the 45 ° direction with the center part of the two being sandwiched, and is joined to the tip of the rod-shaped part 18a. Horizontally placed cylinder 12
Since the processed product outlet 24 is provided on the bottom of the center of the
This is because the processed product can be conveyed to the central portion side and discharged from the processed product discharge port 24.

The horizontal cylinder 12 is provided with a raw material inlet 22 and a dry steam outlet 23 on the upper side, and a processed material outlet 24 on the lower side. The jacket 26 is provided with a first heating medium inlet port (first steam inlet port) 2 for the jacket.
8 and a drain (condensed water) outlet 30 are provided below. Further, both ends of the rotary shaft 16 are provided with a second heating medium inflow port (second steam inflow port) 32 and a second steam outlet 34 for heating the rotary shaft, which are formed by rotary joints. Further, in FIG. 2, reference numeral 36 is a viewing window.

Further, both ends of the rotary shaft 16 are supported by a pair of bearings (bearings) 40, 40, and a drive pulley 42 is attached to one end. The drive pulley 4
Reference numeral 2 is connected to an output pulley 46 of a prime mover 44 so as to be driven by a belt. The transmission means is not limited to belt drive, and may be gear transmission or chain transmission. Further, in the illustrated example, reference numeral 48 is a frame for a horizontal cylinder.

The first and second steam inlets 28 and 3 are also provided.
2 is connected to a steam outlet such as a boiler (not shown) via a steam pipe. The heating medium is not particularly limited as long as it can use the indirect heating method, and examples thereof include hot water, superheated steam, heating oil, and resistance heater (electric heater). Here, the rotary shaft (hollow shaft) 16 is a round pipe in the illustrated example,
Square pipes (triangle / square / polygon in cross section) may be used.

Further, the dry steam discharge port 23 is connected to a deodorizing purifying device and the like (not shown) through a vacuum pipe equipped with a vacuum suction means.

Although not inevitable, in this embodiment, a stirring ball (stirring lump) 20 is placed inside the horizontal cylinder 12 as a stirring medium. Further, a lattice plate (perforated plate) 25 is attached to the processed product discharge port (outlet port) 24 for separating the stirring ball and the dried processed product.

The stirring lump 20 has a spherical shape in the illustrated example, but it does not necessarily have to be a sphere, and may be any columnar body (pellet shape: columnar body, prismatic body), polyhedron, small ring or the like. Further, the size of the stirring ball 20 is the inner volume of the horizontally placed cylindrical body 12 and the type of the processed object, and further the size of the stirring blade element
Although it depends on the arrangement pitch, etc., usually 10 mm to 30 mm
It is about 0 mm. However, it should be larger than the gap between the stirring blade element 18 and the inner peripheral wall surface of the horizontal cylinder 12.

The material of the stirring medium 20 differs depending on the kind of the object to be treated, and may be made of a reinforced plastic to which an inorganic filler having a high specific gravity is added. From the viewpoint of (including), iron-based alloys, aluminum-based alloys, metals such as brass, ceramics such as alumina, zirconia, and titania, and ores and hard stones may be used. Of these, those made of iron-based alloys such as steel and stainless steel can be preferably used. In the case of these metals, ceramics, and even stones, it is desirable to coat the surface with various rubbers or resins from the viewpoint of noise prevention.

It should be noted that the stirring medium is not necessarily heated, but it may be heated (heated) before being charged in view of shortening the drying time. Here, from the viewpoint of preventing adhesion / blowing of the treated material to the wall surface, the agglomerate is preferable as the agitating medium, but even if a rod-like agitating medium that can move independently between the agitating blade elements is introduced as the agitating medium. Good.

The rotation speed of the stirring blade 15 varies depending on the kind of the processed material, but in the case of Okara, for example, the peripheral speed is about 3 to 6 m / min.

The action of the agitated mass is as follows.

Although the amount of the agitated lumps varies depending on the type of the object to be treated and the size of the agitated lumps, it is usually 1 to 20% by volume of the internal volume of the horizontal cylinder 12.

The stirring lump 20 mixed with the object to be treated is
As the stirring blade element (paddle) 18 rotates, the stirring blade element (paddle) 18 is constantly rubbed or lifted to crush the object to be processed or to give an impact to the object to be processed from above. Therefore,
Even starch-like substances such as rice, which become gelatinous when heat is applied to the object to be treated, do not agglomerate or enlarge, and become finely pulverized. Adhesion / bloat of the object to be treated with respect to the inner peripheral wall of the horizontal cylinder 12, the rotating shaft 16 of the stirrer and the stirring blade element 18 is also prevented.

The stirring lump 20 is composed of a rotating shaft 1 which will be described later.
6 and the action of the annular body 38 fitted to the stirring blade element rod-shaped portion 18a, the inner wall surface of the horizontal cylinder 12 and the rotary shaft 16 and the outer peripheral wall of the stirring blade element rod-shaped portion 18a always collide with each other. By rolling, the adhesion of the object to be treated to them is prevented or the adhered material is peeled off.

Further, when the agitated mass 20 is made of metal or ceramics having a good thermal conductivity, the heat is also received from the cylindrical body 12 or the wall surface of the rotary shaft 16 and penetrates into the object to be treated. .

These effects synergistically increase the heat transfer efficiency and the moisture evaporation efficiency with respect to the object to be processed, so that the drying proceeds rapidly.

In this embodiment, in the stirring-type drying device having the above-mentioned structure, the rotating shaft 16 and the stirring blade element rod-shaped portion 18a are made of rigid annular bodies (rings) 38, 38A made of a rigid material.
Further, chain-like annular bodies (chains) 39, 39A are fitted so as to be movable substantially along their respective axial directions.

In the illustrated example, the ring 38 and the chain 39 are used together as an annular body, but only one of them may be used.

The ring 38 and the chain 39 rotate so that the outer wall of each shaft portion (the outer wall of the rotating shaft 16 and the stirring blade element rod portion 18a) is constantly rubbed by the rotation of the stirrer.
It also reciprocates in each axial direction. The inner diameter of the ring (chain) is 15 when the outer diameter of the rotating shaft 16 is 100 mm, for example.
0 to 300 mm.

The material of the ring 38 and the chain 39 is
A metal such as steel, stainless steel, cast iron, or brass is preferable, and round steel, square steel, wire, chain or the like having a thickness of 1 to 50 mm, preferably 5 to 50 mm can be used.

[0040]

EFFECTS OF THE INVENTION When the object to be processed in the drying device is starchy or contains sugar, the paste-like or candy-like matter adheres (adhesively) when heat is applied, and stirring efficiency and thermal conductivity are increased. However, due to the rotation of the stirrer, the rotary motion and / or the reciprocating movement along each axis of the rotary shaft and the annular body fitted to the stirring blade element tend to adhere to the outer wall of each shaft. Scrap the object to prevent sticking / bloat. Therefore, the drying effect is also greatly improved.

Further, since the shaft portion of the stirrer of the object to be treated does not become squeaky, no charring or the like occurs, and it is particularly suitable for drying foodstuffs, and it is easy to obtain stable quality.

[Brief description of drawings]

FIG. 1 is a model front view showing an embodiment of a material stirring type drying apparatus of the present invention

FIG. 2 is a model side view of the material agitation-type drying device in FIG.

FIG. 3 is a perspective view showing an example of a stirrer main body used in the present invention.

[Explanation of symbols]

12 Stirrer type dryer 14 Horizontal rotation stirrer 15 stirring blades 16 rotating shaft (hollow shaft) 18 Stirring blade element 18a Rod portion of stirring blade element 18b Tip paddle of stirring blade element 38, 38A Rigid ring 39, 39A Chain-like ring

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B09B 3/00 C02F 11/12 B ZAB F26B 3/24 C02F 11/12 11/14 F26B 3/24 25 / 04 11/14 B09B 3/00 303C 25/04 ZAB 303Z F Term (reference) 3L113 AA07 AB05 AC58 AC62 AC67 DA04 DA22 4D004 AA02 AA03 AA04 AA12 AB01 AC04 CA15 CA22 CA42 CB02 CB28 BD28 CB28 CB28 CB28 4A0A23 BJ03 4G037 CA01 CA05 DA16 EA03 4G078 AA17 AB20 BA01 DA03 DC08 DC10 EA03 EA13

Claims (5)

[Claims] 1. A horizontal rotary stirrer is provided inside a horizontal cylinder, and a stirring blade of the horizontal rotary stirrer is configured such that a plurality of stirring blade elements each having at least a rod-shaped portion are connected around a rotary shaft. In the material agitation type drying device, a rigid annular body and / or a chain annular body made of a rigid material is fitted to the rotation shaft and / or the rod-shaped portion of the stirring blade element so as to be movable substantially along respective axial directions. A material agitation-type drying device characterized in that 2. An independently movable lumped stirring medium is introduced into the inside of the horizontal cylinder, and the stirring medium is driven by the stirring blades. 1. The material stirring type drying apparatus according to 1. 3. The material agitation-type drying device according to claim 1, further comprising heating means provided on the inner peripheral portion of the horizontal cylinder and / or the rotary shaft, respectively. 4. A horizontal rotary stirrer is provided inside a horizontal cylinder, and the stirrer blades of the horizontal rotary stirrer are formed by connecting a plurality of stirrer blade elements each having at least a rod-shaped portion around a rotary shaft. In the stirrer, a rigid annular body and / or a chain annular body made of a rigid material is fitted to the rotation shaft and / or the rod-shaped portion of the stirring blade element so as to be movable substantially along respective axial directions. A stirrer characterized by. 5. An agitating medium, which is independently movable, is introduced into the inside of the horizontal cylinder, and the agitating medium drives the agitating medium. 4. The stirring device according to 4.