JP2000329467A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an object to be dried from becoming solid while it adheres to and is accumulated at each part of a container or an agitation wing or becoming solid in a mass in the container by placing a hard mass-shaped body that is agitated along with the object to be dried in the container. SOLUTION: A plurality of hard mass-shaped bodies 11 with a proper size being agitated by rotary wings 3A, 3B, and 3C along with an object to be dried are loaded into a container 1 and are agitated along with an object to be dried, thus allowing the hard mass-shaped bodies 11 to hit against the object to be dried that becomes hard due to the progress of drying and crushing the object to be dried that becomes solid. Each of the rotary wings 3A, 3B, and 3C is in a paired configuration for rotating two rotary wings where an outer end is close to the inner-periphery surface of the container 1 while shifting the rotary phase by 180 degrees each at the same direction in the direction of the cylindrical core of the container. At a drying region (a), four pairs of wings are aligned side by side in the direction of the container cylindrical core while the rotary phases of the adjacent pairs of wings are shifted by 90 degrees each, so that an agitation region spreads to the entire length of the drying treatment region (a) in the direction of the cylinder core of the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for solidifying a dried product by evaporating water from a dried product such as garbage, liquid or muddy garbage, or sludge generated in sewage treatment. More specifically, the present invention relates to a dryer that heats an object to be dried, which shows coagulability during a drying process, with stirring by a stirring blade in a container, and converts the object into a solid dried product.

[0002]

2. Description of the Related Art Conventionally, in a drier of this type, only the stirring of the object to be dried in a container by a stirring blade is performed with heating.

[0003]

However, in the conventional machine,
The material to be dried adheres to the various parts in the container and the stirring blades due to the coagulation property that appears during the drying process, and solidifies in an accumulated state, or solidifies in a large lump in the container. There was a problem that it was easy to hinder the taking out of the goods and the operation of the dryer itself.

[0004] Further, maintenance work for removing solid matter adhered to the container is frequently required, and the burden of maintenance management is large, so that it cannot be practically used in a small facility where a dedicated manager cannot be assigned.

[0005] In view of this situation, the main problems of the present invention are:
The above problem is effectively solved by a simple improvement.

[0006]

Means for Solving the Problems [1] In the invention according to the first aspect, the object to be dried which shows coagulability in the drying process is heated in a container while stirring with a stirring blade to form a solid dried product. In the machine, a hard lump which is stirred together with the material to be dried by the stirring blade is put in the container.

That is, according to this configuration, the hard lump placed in the container is agitated in the container by the stirring blades together with the material to be dried, so that the hard lump is solidified as the drying proceeds and solidifies. The object to be dried can be efficiently pulverized by colliding with the body to solidify the object to be dried. And solidification can be effectively prevented.

[0008] Thus, it is possible to effectively prevent the solid dried product from being taken out of the container after the drying treatment and to hinder the operation of the dryer, and to carry out the drying treatment smoothly and stably. It can be a dryer, and also eliminates the need for maintenance work to remove solid matter attached to the container, or greatly reduces the required frequency and makes it simpler work, and maintenance It can be a very easy dryer.

[0009] In addition, by efficiently pulverizing the solidified material to be dried with the hard lump, the solid dried material after the drying treatment can be made into a uniform fine particle or powder, whereby the container can be removed from the container. In addition to facilitating the removal, the handling of the solid dried product after the removal can be facilitated.

[0010] In addition, since the simple improvement can be achieved simply by putting a hard lump having an appropriate size with an appropriate material in the container, the improvement cost can be reduced.

[2] According to the invention according to claim 2, claim 1
In carrying out the invention according to the present invention, the container is a horizontal cylindrical container, and the stirring blade is a rotary blade that rotates relative to the cylindrical container around the cylindrical core of the cylindrical container. The object to be dried in the container is gathered in the drying treatment area on the opposite side of the dried material outlet in the direction of the core of the cylindrical container, and the object to be dried in the container is sent to the dried material outlet in the reverse rotation. A rotary blade having a transport function is provided, and the dried product outlet is configured to be unable to pass through the hard lump.

In other words, according to this configuration, by performing the drying operation while rotating the rotating blades forward, the rotating blades collect the material to be dried together with the hard lump into the drying treatment area in the container. By stirring, the hard agglomerates can be reliably and effectively pulverized to the dried material in an accumulated state, thereby making it possible to reduce the size of the solid dried product after the drying treatment, and to homogenize the powder. Can be further promoted.

After the drying operation, the rotating blades are rotated in the reverse direction, so that the dried solid product after the drying process can be sent from the drying processing area to the dried product outlet by the rotating blades and taken out of the container. Removal of the solid dried product after the drying process can be performed extremely easily only by switching the rotation direction of the rotor, and this also facilitates automation of the removal process.

Moreover, since the solid dried material is taken out by using a rotating blade as a stirring blade for stirring the material to be dried, the apparatus structure is simpler than when equipped with a separate conveying means separate from the one for stirring. Thus, the apparatus can be made compact and the apparatus cost can be reduced.

When the rotor is rotated in the reverse direction, the hard lump is sent to the dried material outlet together with the solid dried material after the drying process, but the dried material outlet has a structure in which the hard lump cannot pass. Therefore, the hard lumps remain in the container and return to the drying treatment area by the normal rotation of the rotary blade after the solid dried product is taken out.

[3] In the invention according to claim 3, the invention according to claim 2
In carrying out the invention according to the present invention, a weir is provided between the drying treatment area and the dried product outlet in the cylindrical container, and the rotating blades are rotated in a normal rotation to dry the dried material in the container. The thing on the side of the material outlet is moved to the drying treatment area over the weir, and in the reverse rotation, the material to be dried in the container is moved from the drying processing area over the weir to the dried material outlet. The rotor has a weir-over function to send to the rotor.

In other words, according to this configuration, the accompanying water of the material to be dried, which has been introduced into the drying treatment zone, flows in the horizontal cylindrical container in the state of the contaminated liquid in the direction of the core, and leaks out of the container from the dried material outlet. By the weir, the associated water of the material to be dried is kept in the drying treatment area by the weir, and is reliably evaporated during the drying process, and the generated steam is led to a predetermined discharge point. In this regard, the dryer can be further improved in terms of hygiene and surrounding environment.

In addition, even though such a weir is provided, the rotating blades, in the case of normal rotation, the material to be dried in the container on the side of the dried material take-out port (that is, when the material is charged into the container or the stirring process is performed). The material to be dried which has leaked to the side of the dried material take-out port) is moved over the weir to the drying treatment area, and in the reverse rotation, the material to be dried in the container is moved from the drying treatment area over the weir. The rotating blade function according to the second aspect of the present invention, that is, a function of collecting the material to be dried together with the hard lumps in the drying treatment area in the container in the drying operation by providing a weir passing function for sending the dried material to the outlet. And the function of sending the dried solid product after the drying treatment to the dried product outlet and taking it out of the container can be sufficiently exerted.

[0019]

1 and 2 show an example of the construction of a dryer according to the present invention, in which a cylindrical container 1 is arranged in a horizontal position, and inside the cylindrical container 1, the tube core P is coaxial. A plurality of rotating blades 3 as stirring blades are provided on a rotating shaft 2 arranged above.
A, 3B, and 3C are attached, and an electric heater 4 for heating the object to be dried in the container is provided in the lower half of the cylindrical container 1, whereby the object to be dried put into the container 1 through the input port 5 is rotated. While being stirred by the rotation of the blades 3A, 3B, 3C, the solid is dried by heating with the electric heater 4. Reference numeral 6 denotes a rotating blade driving motor connected to the rotating shaft 2.

The interior of the container 1 is divided into a drying area a, a partition area b, and an extraction area c in the direction of the cylinder core, and at the bottom of the container, there is a main part between the drying area a and the partition area b. A weir 7 is provided, an auxiliary weir 8 having a lower weir height than the main weir 7 is provided between the partition area b and the take-out area c, and a solid dried product after the drying process is taken out at the bottom of the take-out area c. A dry material outlet 9 is formed.

That is, the accompanying water of the material to be dried, which has been introduced into the drying treatment area a through the inlet 5, is in the form of a contaminated liquid, and the dried material outlet 9
The above-mentioned weirs 7 and 8 prevent the water from leaking out of the container from the container, and the accompanying water of the material to be dried is evaporated by the main weir 7 in accordance with the drying treatment while being kept in the drying treatment area a. From the gas outlet 10 to a predetermined discharge location.

Inside the container 1, a plurality of hard lump bodies 11 (for example, metal balls or ceramic balls) of an appropriate size to be stirred by the rotating blades 3A, 3B and 3C are put together with the material to be dried. By stirring the lump 11 together with the object to be dried, the hard lump 11 is caused to collide with the object to be dried and solidified, thereby efficiently pulverizing the object to be solidified.

Each of the rotating blades 3A, 3B, 3C is configured to rotate two rotating blades whose outer edges are close to the inner peripheral surface of the container 1 at the same position in the core direction of the container by rotating the rotating phases by 180 degrees. In the drying treatment area a, four blade pairs are juxtaposed in the container cylinder core direction with the rotation phases of adjacent blade pairs shifted by 90 degrees, and the stirring area is the total length of the drying treatment area a in the container cylinder core direction. And the rotating blades 3A located at both ends of the drying treatment area a.
Are rotated such that their side edges are brought close to the plate surface of the one end side lid plate 1a of the cylindrical container 1 or the wall surface of the main weir 7.

Further, one partition pair for rotating the side edge of each rotary blade 3B close to the wall surface of the main weir 7 and the wall surface of the auxiliary weir 8 is provided in the partition area b, and in the extraction area c, Each rotor 3
C is the side surface of the other end side cover plate 1b in the cylindrical container 1,
In addition, one blade pair that rotates in proximity to the wall surface of the auxiliary weir 8 is provided, and the rotor 3B in the partition area b is the last rotor in the drying processing area a that rotates in the vicinity of the main weir 7. The rotation phase is shifted by 90 degrees with respect to 3A, and the rotation blade 3C in the extraction area c is shifted in rotation phase by a predetermined angle with respect to the rotation blade 3B in the partition area b.

In the forward rotation indicated by the solid arrow in the drawing, each of the rotary blades 3A, 3B, 3C has a rear side edge (a side on the other end side lid plate 1b side) among the both sides in the container cylinder core direction. The front edge (the edge) rotates ahead of the front side edge in the rotational direction, and in the reverse rotation, the front side edge (the one-side cover plate 1) in the container cylinder core direction.
(a side edge of the side a) is inclined so as to rotate ahead of the rear side edge in the rotation direction, so that the object to be dried is forward-rotated with the stirring function in the forward rotation (one side cover plate). 1a), and in the reverse rotation, a transport function is provided for sending the object to be dried to the container rear side (the other end side lid plate 1b side).

That is, by the above-described structure, in the drying operation, the rotating blades 3A, 3B, and 3C are rotated in the normal direction, so that the object to be dried and the hard mass 11 in the drying processing area a are rotated by the rotating blades in the drying processing area a. The material to be dried and its accompanying water leaking into the partition area b through the main weir 7 during the charging into the container 1 or during the stirring process, etc. The material to be dried is stirred together with the hard lump 11 under heating by the electric heater 4 and dried while the hard lump 11 is moved over the main weir 7 by the rotor 3B of the partition area b and moved to the drying processing area a. Proceed with the process.

When the drying operation is completed, each of the rotating blades 3A, 3B, 3C is rotated in the reverse direction, so that the solid dried product after the drying process is mainly removed from the drying processing area a by each of the rotating blades 3A, 3B, 3C. The water is passed over the weir 7 and the auxiliary weir 8 sequentially to the take-out area c, and flows out from the dried material take-out port 9.

The dry material outlet 9 has a structure (for example, a lattice structure) through which the hard lump 11 cannot pass, and each of the rotary blades 3A, 3B, 3C when the solid dry material is taken out.
The hard mass 11 that has moved to the removal area c by the reverse rotation of
Each of the rotors 3A, 3B, 3C after removing the solid dried product
Is returned to the drying processing area a by the normal rotation of.

[Another Embodiment] Next, another embodiment of the present invention will be described.

In the above-described embodiment, the main weir 7 and the auxiliary weir 8 are provided between the drying processing area a and the dried material outlet 9, and the side edges are brought close to the wall surfaces of the two weirs 7, 8. By providing the rotating blades 3B to be rotated in the partition area b between the two weirs 7 and 8, a function of scraping out the drying object leaking into the partition area b and its accompanying water from the partition area b and transferring it to the drying processing area a. However, in some cases, the auxiliary weir 8 may be omitted.

When the object to be dried has little accompanying water, the weir is omitted, the object to be dried is gathered in the drying processing area a in the forward rotation, and the object is dried in the reverse rotation. It is also possible to equip only a rotary wing with a transport function of sending the (solid dried product after the drying process) to the dried product outlet 9.

In order to provide the rotating blade with a function of transporting the material to be dried and a function of moving over the weir over the weir, the specific shape and structure of the rotating blade can be variously changed. However, the present invention is not limited to the shape and structure shown in the embodiment.

In the above-described embodiment, an example has been described in which the container 1 is fixed and the container 1 and the rotors 3A to 3C are relatively rotated. However, in some cases, the container and the rotor are relatively rotated while the rotor is fixed. Alternatively, the container and the rotating blades may be rotated together so that the two are relatively rotated.

In the above-described embodiment, the horizontal cylindrical container 1
Shows the type in which the rotors 3A, 3B, 3C are installed.
In the implementation of the invention according to claim 1, the specific shape and structure of the container can be variously changed, and the stirring blade is not limited to the rotary type, for example, a swing type stirring blade, Various types of stirring blades can be used.

In the above-described embodiment, an example in which an object to be dried in a container is heated by an electric heater has been described. However, various types of heating devices are used, for example, an object to be heated in a container is heated by a burner. it can.

The hard lumps 11 to be put in the container are not limited to metal spheres or ceramic spheres, but may be polyhedral shapes other than spheres. Various materials can be used as long as the material has a higher hardness than the dried material.

The materials to be dried include garbage,
Any kind of liquid or muddy garbage fermented product or sludge generated by sewage treatment may be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dryer.

FIG. 2 is a cross-sectional view of a dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 3A-3C Stirrer blade, rotary blade 7,8 Weir 9 Dry material outlet 11 Hard lump a Dry processing area P Tube core

Claims (3)

[Claims] 1. An object to be dried which shows coagulability in a drying process,
What is claimed is: 1. A dryer in which a solid mass which is heated by stirring with a stirring blade in a container to form a solid dry product is stirred in the container together with the object to be dried by the stirring blade. 2. The container is a horizontal cylindrical container, and the stirring blade is a rotating blade that rotates relative to the cylindrical container around the cylindrical core of the cylindrical container. The material to be dried is gathered in the drying treatment area on the opposite side of the dry material outlet in the direction of the core of the cylindrical container, and the reverse rotation rotates the material to be dried in the container to the dry material outlet. 2. The dryer according to claim 1, wherein the rotor has a structure in which the hard material is not allowed to pass through the outlet. 3. 3. A weir is provided inside the cylindrical container between the drying processing area and the dried material outlet, and the rotating blades are rotated in a normal rotation to remove the dried material out of the material to be dried in the container. The thing on the outlet side is moved to the drying treatment area by passing over the weir, and in the reverse rotation, the object to be dried in the container is sent from the drying treatment area over the weir to the dried material take-out port. 3. The dryer according to claim 2, wherein the rotor has a weir passing function.