JPH0744949Y2 - Hot air heating dryer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying device, and more particularly to a drying device capable of drying an object to be dried without separately providing a boiler or the like for heating a heating medium.

[0002]

2. Description of the Related Art As is well known, various drying devices are used to dry an object to be dried, such as liquid, fluid, semi-fluid, powder, and granules. Is a rotary shaft vertically arranged in the drying tank along the direction of gravity and spirally mounted on the rotary shaft in a spiral shape, and the upper surface of the rotary shaft is flat in Japanese Utility Model Laid-Open No. 19501/1991. A blade is provided, and by rotating the spiral rotary blade, the material to be dried in the drying tank is sequentially raised from the lower side to the upper side of the spiral rotary blade in the direction opposite to the rotation direction of the spiral rotary blade. Also, a drying device that presses the material to be dried on the upper surface of the spiral rotary blade into a thin film on the heat transfer surface on the inner wall surface of the drying tank by the centrifugal force of the spiral rotary blade to dry the material to be dried is provided. Proposed.

The above-mentioned drying apparatus uses a heating medium such as steam as a means for heating the heating heat transfer surface for drying the material to be dried. The boiler for heating the heating medium such as steam is also used. , Was used with the steam generator.

According to the above-mentioned drying device, any kind of material to be dried such as liquid, fluid or semi-fluid, powder or granules can be efficiently dried, and the dried material can be uniformly treated. Although it can be made into powder, since a heating medium is used to heat the heating heat transfer surface for drying the material to be dried, separate equipment such as a boiler is required,
Since they must be installed together with the drying device, the equipment itself and the equipment cost will be large, the equipment location will be limited, and the maintenance of the boiler will be difficult and at the same time a boiler engineer will be required, The problem is that running costs are high.

However, as disclosed in Japanese Patent Publication No. Sho 49-24232, there has been a drying device which only utilizes the heat of combustion generated by an oil burner or the like.

Therefore, the technique disclosed in Japanese Utility Model Laid-Open No. 19501/1991 and the technique disclosed in Japanese Patent Publication No. 49-24232 are combined to heat the heat transfer surface on the inner wall surface of the drying tank. A hot air heating type drying device is considered in which hot air generated from a hot air source integrally provided with the drying tank and the hot air passage is introduced into the hot air passage provided on the outer periphery of the drying tank. It was

[0007]

According to the above-mentioned hot-air heating type drying device of the prior art, the heating of the heating heat transfer surface for drying the material to be dried is performed in the hot-air passage provided on the outer periphery of the drying tank. In addition, since it is performed by introducing hot air generated from a hot air source provided integrally with the hot air passage, no heating medium is required, and therefore, it is not necessary to separately install a boiler, etc. In addition to simplification, the equipment cost can be reduced, and maintenance of the boiler and the like is not required, and the running cost can be reduced. Further, since the above hot air heating type drying device has a simple structure, it can be easily made compact and compact, and can be easily handled by end users such as households, and household waste, kitchen waste, and other treatments can be easily performed. Have advantages.

By the way, in the above-mentioned prior art, by rotating the spiral rotary blade, the material to be dried is placed on the upper surface of the spiral rotary blade in a direction opposite to the direction of rotation of the spiral rotary blade, and sequentially.
The material to be dried is raised from the bottom to the top, and in the meanwhile, the material to be dried is pressed against the heating and heat transfer surface of the inner wall of the drying tank in a thin film. It is possible to efficiently dry the material to be dried of
In order to better enable this advantage, while riding on the upper surface of the spiral rotary blade, it rises from bottom to top in order to further prevent the material to be dried from falling near the upper end of the spiral rotary blade into the tank. It was found that the better the drying speed was, the better it was to accelerate and put the material to be dried that had fallen below the tank on the spiral rotary blade again, and to raise it sequentially from bottom to top. .

Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, and does not require a boiler or the like installed separately from the dryer, and the equipment itself and It is of course possible to provide a small and compact drying device that can reduce the equipment cost, the maintenance cost is easy and the running cost can be reduced, and end users such as households can process waste, kitchen waste, etc. , It is possible to improve the drying efficiency by improving the falling of the material to be dried, which has reached near the upper end of the spiral rotary blade, into the tank with easy means, and it can be applied to the drying of various materials to be dried. It is to provide a means for obtaining things.

[0010]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has the following technical means. That is, to explain with reference to the reference numerals used in the accompanying drawings corresponding to the embodiment, a rotary shaft 3 vertically arranged in the drying tank 2 along the gravity direction G and a spiral mount on the rotary shaft 3, The upper surface 6 is provided with a spiral rotary blade 4 having a flat surface, and by rotating the spiral rotary blade 4, the material to be dried E in the drying tank 2 is in a direction opposite to the rotation direction R of the spiral rotary blade 4. From Q, raise the spiral rotary vane 4 along the upper surface 6 in order from bottom to top,
Moreover, the material E to be dried on the upper surface 6 of the spiral rotary blade 4 is pressed in a thin film shape onto the heating heat transfer surface 7 on the inner wall surface of the drying tank 2 by the centrifugal force P of the spiral rotary blade 4, whereby the material E to be dried E. A heating device for drying the heating heat transfer surface 7 of the inner wall of the drying tank 2 is a drying device for drying the drying tank 2 and the hot air passage 20 provided in the outer periphery 5 of the drying tank 2. In a hot-air heating type drying device which is performed by introducing a heat shadow generated from a hot-air generating source 21 integrally provided with the;
On the inner wall surface of the upper portion of the drying tank 2, the upper surface 6 of the spiral rotary blade 4 is arranged in the direction Q opposite to the rotation direction R of the spiral rotary blade 4.
In order to hit the object to be dried E which is rising while coming into contact with the heating heat transfer surface 7 while being in contact with the heating heat transfer surface 7 and scraping the object to be dried E from the spiral rotary blade 4 and dropping it to the lower part in the drying tank 2. Is attached to the upper surface 6 of the spiral rotating blade 4 with a gap P between the lower end W of the baffle M and the upper surface 6 of the uppermost portion F of the spiral rotating blade 4. The hot-air heating type drying device is characterized in that it extends on the rotation orbit of the spiral rotary blade 4.

[0011]

The present invention comprises the above technical means, and the hot air generated from the hot air generating source 21 provided integrally with the drying tank 2 and the hot air passage 20 in the hot air passage 20 arranged on the outer periphery 5 of the drying tank 2. Is installed to heat the heating heat transfer surface 7 on the inner wall of the drying tank 2 to dry the material to be dried E. Since a heating medium or the like is not required and therefore a boiler or the like is not required to be separately installed, It can simplify itself and reduce equipment cost,
Moreover, since maintenance of the boiler and the like is unnecessary, the running cost can be reduced, and the material E to be dried is placed on the upper surface 6 of the spiral rotary blade 4 in the direction Q opposite to the rotation direction R of the spiral rotary blade 4. While being pressed in a thin film onto the heating heat transfer surface 7 on the inner wall surface of the drying tank 2 by the centrifugal force generated by the rotation of the spiral spiral blade 4, the spiral rotary blade 4 sequentially rises from the bottom to the spiral rotation. The blade 4 drops downward from the uppermost portion F of the blade 4, and this operation is repeated thereafter.

By the way, the uppermost portion F of the spiral rotary blade 4 is described.
Since the baffle M is provided nearby, the material to be dried E that has reached near the uppermost portion F hits the baffle M, scrapes off the material to be dried E that accumulates at the uppermost portion F of the spiral rotary blade 4, and the drying tank It is made to fall below 2.

[0013]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1, the drying apparatus 1 of the present invention has a cylindrical drying tank 2 for accommodating and drying the material to be dried E and a flow for raising and lowering the material to be dried E in the drying tank 2. And a heat drying passage 2 on the outer periphery 5 of the drying tank 2.
0 is provided, and the hot air is introduced into the hot air passage 20 to heat the inner wall of the drying tank 2 to form the heat transfer surface 7. A hot air source 21 for introducing hot air into the hot air passage 20 is composed of a combustion chamber 22 and a burner 23 disposed in the combustion chamber 22, and is integrally provided with the drying tank 2 and the hot air passage 20. is there.
Further, the hot air passage 20 and the combustion chamber 22 are integrally communicated with each other, and the combustion gas of the burner 23 arranged in the combustion chamber 22, that is, the hot air, is directly introduced into the hot air passage 20 and is burned. A plurality of air holes 24 for introducing air into the combustion chamber 22 are formed in the lower portion of the chamber 22, and the hot air of the combustion gas of the burner 23 can be formed into an upward airflow and introduced into the hot air passage 20 efficiently. It is possible. The burner 23 is a very simple pipe-shaped one as shown in FIG. 2, and is a burner 23 that uses gas, oil or the like as a fuel and is easy to handle.

The flow means comprises a rotary shaft 3 vertically arranged in the drying tank 2 along the direction of double motion G and a spiral rotary blade 4 spirally attached to the rotary shaft 3. Further, the spiral rotary blade 4 is formed by a flat plate-like body 35 and a semi-cylindrical body 36, and its upper surface 6 is made flat, and is attached to the rotary shaft 3 by a plurality of support bodies 43. The rotary shaft 3 is arranged so as to pass through the center line of the drying tank 2, and the lower end 23 of the rotary shaft 3 is fitted into a rotary shaft lower end holding hole 27 provided in the lower portion of the drying tank 2.
It is rotatably held via 5 and rotatably in the drying tank 2. Further, the lower end 23 of the rotary shaft 3
A geared motor 18 is connected to the rotary shaft 3, so that the rotary shaft 3 is rotated.

Above the spiral rotary vane 4 is attached to the inner wall surface of the upper portion of the drying tank 2 and has its lower end W.
And a top surface 6 of the uppermost portion F of the spiral rotary blade 4 and a plate-shaped baffle M extending on the spiral orbit of the spiral rotary blade 4 on the top surface 6 of the spiral rotary blade 4 with a slight gap P therebetween. There is
The material E to be dried accumulated on the uppermost portion F of the spiral rotary blade 4 is scraped off and dropped below the drying tank 2. The number of baffles M and the mounting angle (angle with respect to the inner wall of the drying tank) of the baffle M are changed by changing the size of the gap between the uppermost surface 6 of the spiral rotary vane 4 and various objects E to be dried can be efficiently dried. It is a thing.

Next, the operation will be described based on the above configuration. First, the burner 23 of the hot air source 21 is ignited, the combustion gas of the burner 23 is introduced as hot air from the combustion chamber 22 into the hot air passage 20, and the heating electric heating surface 7 on the inner wall of the drying tank 2 is heated. At this time, since the air used for combustion is introduced from the air holes 24 formed in the lower part of the combustion chamber 22, the hot air generated by the combustion of the burner 23 rises V without being disturbed, so that the efficiency is improved. The heat transfer surface 7 can be heated well. Since the heating heat transfer surface 7 is heated directly by the hot air generated by the combustion of the burner 23, the heating heat transfer surface 7 can be heated to a predetermined temperature in a very short time.

After the heating heat transfer surface 7 is heated to a predetermined temperature, the motor 18 is operated to rotate the rotary shaft 3 R
Let The rotation of the rotary shaft 3 causes the spiral rotary blade 4 to rotate R, so that the material to be dried E is in a state as shown in FIG. That is, the material to be dried E is sequentially scooped up by the spiral rotary blade 4 in the lower part of the drying tank 2 and is sequentially moved upward in the direction Q opposite to the rotation R direction at a speed slower than the rotation speed. The material to be dried E located on the upper surface 6 of the spiral rotary blade 4 is pressed against the heating heat transfer surface 7 by the centrifugal force P due to the rotation R and is pushed up U to form a thin film, or a part thereof. It falls off and falls D. The material E to be dried is pressed against the heating and heat transfer surface 7 in a thin film shape, so that uniform heat reception is realized and drying can be performed very efficiently.

Then, the material E to be dried, which has risen in sequence, goes to the upper end portion N of the spiral rotary blade 4 and strikes one surface I of the baffle M as shown in FIG. After that, a slight gap P between the upper surface 6 of the spiral rotary blade 4 and the lower end W of the baffle M is set.
To reach the upper end N. Here, since the speed at which the material to be dried E rises is smaller than the rotation speed of the spiral rotary blade 4,
The material to be dried E temporarily stays near the upper end portion N, but hits the other surface J of the baffle M by the rotation R of the spiral rotary blade 4, is scraped off, and is dropped D below the drying tank 2. Then, the above operation is repeated in the same manner, and the dried object E
The ascent and descent can be efficiently carried out, and the drying efficiency is remarkably improved.

[0019]

As described above in detail, the present invention has the following effects. That is, the heating of the heating heat transfer surface for drying the material to be dried introduces the hot air generated from the hot air source provided integrally with the drying tank and the hot air passage into the hot air passage provided on the outer periphery of the drying tank. Since it is carried out by means of a heating medium, there is no need for a heating medium, so there is no need to separately install a boiler, etc., so the equipment itself can be simplified and the equipment cost can be reduced, and maintenance of the boiler etc. is unnecessary and running The cost can be reduced, and since the drying device has a simple structure, it can be easily made compact and compact, and can be easily handled by end users such as households.
It is possible to provide a drying device that can treat household waste, food waste, etc., as well as riding on the upper surface of the spiral rotary blade while contacting the heating heat transfer surface in a thin film, and rotating the spiral rotary blade. The material to be dried, which rises sequentially from the opposite direction, hits one surface of the baffle near the upper end of the spiral rotary blade and passes through the gap between the lower end of the baffle and the upper surface of the spiral rotary blade to the other surface of the baffle. Further, after staying near the upper end of the spiral rotary vane, it is scraped off on the other surface of the baffle, that is, because it is promoted to fall to the lower inside of the drying tank.
After all, since the circulation drying operation of raising and dropping the material to be dried by the spiral rotary blade is efficiently performed, the drying efficiency is improved. Further, since the baffle itself has a simple structure, it can be easily applied to dry various materials to be dried, and in addition, it has various advantages such as low equipment cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a hot air heating type drying device.

FIG. 2 is a side view of a hot air source burner.

FIG. 3 is a vertical sectional view of a drying tank and a spiral rotary blade showing a dried state of an object to be dried.

FIG. 4 is a perspective view showing a scraping action of a material to be dried by a baffle.

[Explanation of symbols]

 1 Drying Device 2 Drying Tank 3 Rotating Shaft 4 Spiral Rotating Blade 20 Hot Air Passage 21 Hot Air Generation Source E Dried Material M Baffle

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft 3 vertically disposed in a drying tank 2 along a gravity direction G, and a spiral rotary blade spirally attached to the rotary shaft 3 and having an upper surface 6 made flat. 4, the spiral rotary blade 4 is rotated to move the material E to be dried in the drying tank 2 along the upper surface 6 of the spiral rotary blade 4 from the direction Q opposite to the rotation direction R of the spiral rotary blade 4. Ascending in order from the bottom to the top, and moreover, the upper surface 6 of the spiral rotary blade 4.
The object to be dried E is pressed by a centrifugal force P of the spiral rotary blade 4 onto the heat transfer surface 7 on the inner wall surface of the drying tank 2 in a thin film form, and the object to be dried E is dried by the drying device. Therefore, the heating of the heating heat transfer surface 7 on the inner wall of the drying tank 2 is performed in the hot air passage 20 provided on the outer periphery 5 of the drying tank 2.
And a hot-air heating type drying device which is performed by introducing hot air generated from a hot-air generating source 21 integrally provided with the hot-air passage 20: The spiral rotary blade 4 is provided on the inner wall surface of the upper part of the drying tank 2. From the direction Q opposite to the rotation direction R of the upper surface 6 of the spiral rotary blade 4.
In order to hit the object to be dried E which is rising while coming into contact with the heating heat transfer surface 7 while being in contact with the heating heat transfer surface 7 and scraping the object to be dried E from the spiral rotary blade 4 and dropping it to the lower part in the drying tank 2. Is attached to the upper surface 6 of the spiral rotary blade 4 with a gap P between the lower end W of the baffle M and the upper surface 6 of the uppermost portion F of the spiral rotary blade 4. The hot-air heating type drying device is characterized in that it extends on the rotation orbit of the spiral rotary blade 4.