KR101080575B1 - Disk dryer - Google Patents

Abstract

PURPOSE: A disk drier is provided to simplify a facility for the disk drier and to improve the efficiency of a drying process by suppressing the generation of a sludge sticking phenomenon. CONSTITUTION: A disk drier includes a drier main body(10), a rotary shaft(20), a plurality of disks(30), and a perforated plate(40). The disks are regularly arranged along the longitudinal direction of the rotary shaft and dries sludge. The perforated plate is installed a space between the disks and an exhaust gas hood. The perforated plate exhausts exhaust gas and eliminates a remaining space in which sludge is capable of being agglomerated. The perforated plate includes a plurality of perforated plate units. A scraper scrapes sludge without the damage of the disks.

Description

Disk Dryer

The present invention relates to a disk dryer, and more particularly, to a disk dryer capable of preventing sludge from occurring and increasing the throughput of sludge, improving drying efficiency, and simplifying equipment. .

Dryers are devices that are used to evaporate moisture, and various kinds are known and used for the purpose.

Looking at the type, it can be classified into a direct heating dryer that is directly heated by heating using hot air, infrared or high frequency according to the heating method, and an indirect heating dryer that is indirectly supplied with heat to dry by contact.

And depending on the type of drying, rotary dryers for lime and fertilizer drying, tunnel dryers for drying wooden bricks, box dryers for wool, clay, etc., mainly used at low temperatures, and medicines and photographic materials It can be divided into a vacuum dryer or the like.

Among these various types of dryers, the indirect heat conduction dryer can indirectly conduct heat to enlarge the heat transfer area to maximize the amount of heat required for drying compared to the actual supply heat, so that the particles of the sludge which is the dried material in the same heat transfer area The smaller the value, the larger the specific surface area, the higher the heat transfer effect, and the faster the drying rate as the internal moisture is present as surface water.

A paddle dryer, a disk dryer, a drum dryer, a thin film evaporation dryer, etc. are known as such an indirect thermal conductivity dryer.

Indirect heat conduction type disc dryers, which are a type of rotary dryer in which an internal rotating shaft is rotated by a drive means, are widely used for drying materials on feed, fish meal, fine, ceramic, and sticky sludge.

On the other hand, although not shown in the related art, a conventional disk dryer is provided with a plurality of disks on a rotating shaft in the dryer body, and after the disk is heated, the sludge introduced into the dryer body is brought into contact with the disk, and the sludge is dried and discharged by indirect thermal conductivity. Is operated.

However, in such a conventional disk dryer, since a predetermined space is formed around the dry exhaust gas hood for discharging the flue gas generated during the drying of the sludge, the sludge aggregates in the dry flue gas hood region when the disk is rotated. There is a problem that the sticking phenomenon occurs.

As an alternative to prevent such sticking phenomenon, conventionally, a method of installing a dry sludge re-injection facility and re-injecting the dry sludge into the disc dryer is used to avoid the water content of 33 to 55%, which is a moisture content in the range where the sticking phenomenon occurs. Has come.

However, in this case, the throughput of the sludge can be reduced, resulting in a problem that the drying efficiency is lowered and the facility is complicated.

In fact, the sticking phenomenon is because the space where the sludge can be formed is formed around the dry exhaust gas hood, so that the space around the dry exhaust gas hood can be effectively blocked, but the exhaust gas can be discharged without abnormality, thus preventing the sticking phenomenon. It is expected to be.

In the conventional disc dryer, a scraper is installed in the dryer main body to scrape the sludge stuck to the rotating shaft or the disk side. Usually, the scraper has been combined in a cantilever form inside the main body of the dryer. It may also be bent, and when used in a bent state, the scraper may come into contact with the disc and damage the disc, which should be accompanied by structural improvements.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk dryer that can prevent sludge from occurring and can increase the throughput of sludge, improve the drying efficiency, and simplify the equipment.

The above object is, the dryer main body is provided with a dry exhaust gas hood (hood) for discharging the exhaust gas generated during drying for the sludge on one side; A rotating shaft rotatably provided in the dryer body; A plurality of disks arranged at equal angle intervals along the longitudinal direction of the rotating shaft to dry the sludge; And a perforated plate installed in an area between the disc and the dry exhaust gas hood, wherein the exhaust gas discharges the sludge and prevents the sludge from agglomerating.

The perforated plate may include a plurality of unit perforated plates, and the plurality of unit perforated plates may be detachably connected along a length direction of the rotation shaft.

It may further include a reinforcing member disposed in an upper region of the perforated plate facing the dry exhaust gas hood to reinforce the perforated plate.

Both ends may further include at least one scraper coupled to both sides of the inner wall of the dryer body to scrape the sludge fixed to the rotating shaft or the disk.

The scraper may be disposed between the disks, and a replacement door for replacing the scraper may be further provided in the dryer body to which both ends of the scraper are coupled.

According to the present invention, it is possible to increase the throughput of the sludge by preventing the occurrence of sticking phenomenon and to improve the drying efficiency as well as to simplify the installation.

1 is a structural diagram of a disk dryer according to an embodiment of the present invention,
2 is a longitudinal cross-sectional view of FIG.
3 is a perspective view of the perforated plate,
4 is an exploded perspective view of the perforated plate,
5 is an exploded perspective view of the perforated plate deformation;
Fig. 6 is a perspective view of the disk and the scraper arrangement state.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a structural diagram of a disk dryer according to an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of FIG. 1, FIG. 3 is a perspective view of a perforated plate, FIG. 4 is an exploded perspective view of a perforated plate, and FIG. And FIG. 6 is a perspective view of the disk and the scraper arrangement state.

Referring to these drawings, the disk dryer of the present embodiment includes a dryer body 10, a rotating shaft 20, a plurality of disks 30, and a perforated plate 40. As shown in FIG.

The dryer body 10 forms the appearance of the disk dryer of the present embodiment, and forms a place where the drying operation of the sludge proceeds inside. The dryer body 10 may be made of a metal material having rigidity and corrosion resistance and wear resistance.

The lower one side of the dryer body 10 is formed with a sludge outlet 11 through which the dried sludge is discharged.

And the upper part of the dryer body 10 is provided with a dry exhaust gas hood (hood) 12 through which the exhaust gas generated when drying the sludge is discharged. The dry exhaust gas hood 12 may be formed as large as the size of the dryer body 10.

The rotating shaft 20 is disposed in the central region of the dryer body 10 to rotatably support the plurality of disks 30.

The rotating shaft 20 may be rotated by a driving means (not shown) outside the dryer body 10, and the inside of the rotating shaft 20 may form an empty space to allow steam or hot air to flow.

The plurality of disks 30 are arranged at equal angle intervals along the longitudinal direction of the rotation shaft 20. The disks 30 are heated by steam or hot air, and then contact with the sludge to dry the sludge in an indirect heat conduction manner.

The disks 30 may have a generally disk shape in which the width is gradually narrowed toward the radially outer side of the rotation shaft 20. In addition to the role of drying the sludge, the disk 30 has to convey the sludge toward the sludge outlet 11, the disk 30 may have an approximately screw shape.

On the other hand, since there is a certain space is formed around the dry exhaust gas hood 12 in the dryer body 10, if there is no special measures for this area, the sludge is dried during the rotation of the disk 30, the dry exhaust gas hood 12 In the area, so-called bunching may occur.

In order to prevent such a sticking phenomenon from occurring, the perforated plate 40 is disposed in the dry exhaust gas hood 12 region in the dryer main body 10.

That is, the perforated plate 40 is installed in the region between the disks 30 and the dry exhaust gas hood 12, and serves to prevent the sludge from aggregating while the exhaust gas is discharged through the plurality of through holes H.

In view of the fact that the disk 30 is manufactured in a disk shape, the perforated plate 40 may have a substantially half-cut pipe shape. Of course, the scope of the present invention is not limited to the shape thereof.

Given that it is difficult to manufacture the perforated plate 40 which is integrally installed in the dry exhaust gas hood 12 region at a time because the disc dryer is considerably long in the longitudinal direction, the perforated plate 40 has a plurality of unit perforated plates (as shown in this embodiment). 41) may be preferably detachably connected along the longitudinal direction of the rotary shaft 20.

At this time, the method of connecting the unit perforated plate 41 may have a number of ways as shown in FIGS.

For example, in the case of FIG. 4, after the end regions of the unit punching plates 41 are overlapped, the bolts B (see FIG. 3) are coupled to the bolt holes H1 formed in the unit punching plates 41. 4 may be the simplest but a slight step may occur between the unit perforated plates 41.

To eliminate the step, the same method as in FIG. 5 may be applied. That is, in the case of FIG. 5, after the end portions of the unit perforated plates 41 are folded, the separate plate 42 is applied to a portion where the unit perforated plates 41 are folded, and the bolt holes H1 and the cover plate of the unit perforated plates 41 are formed. A bolt B (see FIG. 3) is coupled to the bolt hole H2 of FIG. 42.

When the method of FIG. 5 is applied, a plurality of unit perforated plates 41 may be connected to each other without a step occurring in the unit perforated plates 41. In addition, the plate 42 may serve to give rigidity to the unit perforated plates 41.

4 and 5, or similar but not shown in other manners by applying the perforated plate 40 in the dry exhaust gas hood 12 region in the dryer body 10, through a plurality of through holes (H) Flue gas can act to prevent sludge buildup while releasing. Therefore, it is possible to increase the throughput of the sludge by preventing the occurrence of sticking phenomenon, to improve the drying efficiency and to simplify the installation.

A reinforcing member 50 for reinforcing the perforated plate 40 is further provided in the upper region of the perforated plate 40 facing the dry exhaust gas hood 12. The reinforcing member 50 is coupled to the inner wall of the dryer body 10 to prevent the perforated plate 40 from being displaced or deformed. The reinforcing member 50 may be provided in plural numbers with a distance therebetween.

On the other hand, the disk dryer of the present embodiment is provided with a plurality of scrapers 60, both ends are coupled to the dryer main body 10 to scrape the sludge fixed to the rotating shaft 20 or the disk 30.

Such scrapers 60 may be disposed between the disks 30, as shown in FIG. 6. Unlike conventional cantilever shapes, both ends of the scraper 60 are coupled to the dryer body 10 so that the scrapers ( It is possible to prevent the disk 30 from being damaged by the 60. The disk 30 of the figure shown is only shown in approximately disc shape.

The scrapers 60 may be disposed only on either the upper side or the lower side of the disk 30 as shown in FIG. 6. Of course, it does not matter even if it arrange | positions to both the upper and lower sides of the disk 30.

In order to easily replace the scraper 60, the dryer main body 10 to which both ends of the scraper 60 are coupled is further provided with a replacement door 70, so that both ends of the scraper 60 are replaced with the door 70 for replacement. If it is coupled to the), when replacing the scraper 60, the replacement of the replacement door 70 and the scraper 60, the replacement door 70 by opening the replacement door 70 to take out the scraper 60 can be easily replaced. The replacement door 70 may be a sliding door or a sliding door.

Look at the operation of the disk dryer having such a configuration.

Steam or hot air is transmitted to the disks 30 through the rotating shaft 20 so that the disk 30 is heated. Then, the sludge introduced into the dryer body 10 is contacted with the disk 30 during the rotation of the disk 30 and dried in an indirect heat conductive manner.

The gas generated during drying is discharged to the outside through the dry exhaust gas hood 12. At this time, since the perforated plate 40 is installed in the dry exhaust gas hood 12 region, through the through holes H of the perforated plate 40. Flue gas can act to prevent sludge buildup while releasing.

Therefore, it is possible to increase the throughput of the sludge by preventing the occurrence of sticking phenomenon, to improve the drying efficiency and to simplify the installation.

The sludge which has been dried in the dryer body 10 is transferred to the sludge outlet 11 and discharged to the outside through the sludge outlet 11.

According to this embodiment having such a structure and operation, it is possible to prevent the sticking phenomenon occurs to increase the throughput of the sludge, improve the drying efficiency and simplify the equipment.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

10: dryer body 11: sludge outlet
12: dry exhaust gas hood 20: rotating shaft
30: disk 40: punched plate
41: unit perforated plate 50: reinforcing member
60: scraper 70: replacement door

Claims (5)

A dryer main body having a dry exhaust gas hood (hood) through which exhaust gas generated during drying of the sludge is discharged;
A rotating shaft rotatably provided in the dryer body;
A plurality of disks arranged at equal angle intervals along the longitudinal direction of the rotating shaft to dry the sludge; And
It is installed in the region between the disk and the dry exhaust gas hood, the exhaust gas comprises a perforated plate to remove the free space for the sludge agglomeration while preventing the sludge sticking phenomenon,
The perforated plate comprises a plurality of unit perforated plate,
The plurality of unit perforated plate is detachably connected along the longitudinal direction of the rotary shaft,
At least one scraper coupled to the dryer body and disposed between the disks to scrape the sludge without damaging the disk,
The dryer body coupled to both ends of the scraper is a disk dryer, characterized in that the replacement door for the replacement of the scraper is further provided.
delete The method of claim 1,
And a reinforcing member disposed in an upper region of the perforated plate facing the dry exhaust gas hood to reinforce the perforated plate.
delete delete

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