JP3030929B2 - Vibration dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration dryer, and more particularly to a vibration dryer optimal for use in a plant for treating municipal solid waste.

[0002]

2. Description of the Related Art In recent years, treating municipal solid waste has become a major social problem. As an example of a plant for treating municipal solid waste, after incinerating municipal solid waste and turning it into ash, There are plants that can fill this. After burning the refuse in such a plant,
It must be cooled by applying water and transported from the incineration location to a location. Some plants use a vibration dryer for this purpose. In this vibration dryer, for example, a large number of strips are fixed to a casing to form a transfer path by vibration with a slight gap, and the entire casing is moved in a predetermined direction by, for example, a crank type vibration drive unit. The ash from the incinerator supplied to one end of the current plate as a transfer path is transferred by vibrating at a predetermined frequency with a predetermined amplitude, and in the middle of this transfer, the ash is passed from below through the gap of the current plate. Blow hot air to
As a result, while the ash on the current plate is fluidized, the ash in a wet state is exchanged with the hot air and transferred while drying, and the dried ash is discharged from the other end of the current plate to a predetermined position. Is known.

However, municipal solid waste must be disposed of in large quantities and must be disposed of continuously, and for a certain period of time,
When the vibratory dryer is operated, sludge-like ash gradually builds up on the flow straightening plates, and not only clogs small gaps between the flow straightening plates, but also hinders the flow of hot air,
At a predetermined amplitude, vibration angle and frequency, it becomes impossible to transfer ash with a desired discharge amount, and finally, stagnation of sludge ash continuously supplied from the supply end frequently occurs. ing.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above problem. It is an object of the present invention to provide a vibratory dryer capable of drying at a predetermined temperature and discharging a desired discharge amount to a predetermined position.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a casing in which a straightening plate having a large number of openings is stretched, a gas supply means for sending hot air from below to above the straightening plate,
A chain belt which is disposed along the straightening plate and is provided with a leaf spring standing upright at a predetermined pitch.
The casing is vibrated to transfer the material to be dried on the current plate, and the lower traveling portion of the chain belt travels in the same direction as the transport direction by the vibration, and
The traveling speed of the leaf spring is changed by the vibration of the material on the current plate.
Approximately equal to the feed rate, with該被dried material is heated by the hot air in the transport course of said the dried material, the Chi
This is achieved by a vibratory dryer characterized in that it is rubbed at the lower end of the leaf spring bent in the direction opposite to the running direction of the chain belt .

[0006]

The casing on which the current plate having a number of openings is stretched is vibrated at a predetermined frequency, amplitude and vibration angle in the same manner as in the prior art. The sludge-like ash of the incinerated municipal waste supplied to one end of the current plate is transferred on the current plate by the vibration. During this transfer, hot air is sent upward from below through many openings in the current plate. As a result, the sludge-formed municipal solid waste on the current plate becomes a fluidized state, is efficiently exchanged with hot air, is heated, and is transferred by vibration while being dried.

On the other hand, among the leaf springs attached at a predetermined pitch to a chain belt disposed above the current plate and along the current plate, the lower end portion of the leaf spring located at a lower traveling portion of the chain conveyor. Presses the baffle plate, deforms it slightly, deforms it by vibration, pushes the baffle plate at the lower end of this leaf spring, and slightly deflects the sludge-like municipal ash on it. It works to scrape. Accordingly, the chain conveyor travels at a predetermined driving speed, and at the same time, the lower end of the leaf spring sticks as the degree of drying progresses on the current plate, which is conventionally generated by always scraping the sludge on the current plate at that pitch. The tendency can be hindered, so that the desired degree of dryness can be maintained continuously for a long period of time, and the sludge can be dried to a desired position at a desired discharge amount and discharged as ash to the outside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vibration dryer used in a municipal waste treatment plant according to an embodiment of the present invention will be described below.

FIGS. 1 and 2 show the entire vibration dryer of the present embodiment, which is designated as 1 and comprises a chain conveyor section 2 and a vibration transport section 3 located at an upper portion.

First, the vibration transport unit 3 will be described. A rectangular casing 4 is connected to a lower base frame 5 by a plurality of coil springs 7 and a wrench 8.
The center of the lengker 8 is rotatably supported by a rubber bush 10 at the upper end of a column 9 erected on the base 5. The rubber bush is also rotatable at both ends with respect to the casing 4 and the base 5. It is supported by. Although such a structure is publicly known, according to the present embodiment, the coil spring 7 and the lengker 8 disposed vertically to the coil spring 7 are mounted at right angles to each other. Is set large.

An electric motor 11 as a drive source is fixed to one side wall of the base 5, and this is
2, a rotational force is transmitted to the casing 4 via a belt, and the crank drive mechanism 12 converts the rotational force into a linear vibration force. The linear vibration force is transmitted to the casing 4 via a drive rod 13 and a shock absorber 14 made of sheet rubber. The power is transmitted to the mounting plate 15 fixed to the side wall. That is, one mounting plate of the rubber plate of the shock absorber 14 made of the rubber plate is the mounting plate 1.
5 and the other mounting plate is fixed to the drive rod 13.

Although the casing 4 has a closed structure, a rectifying plate 17 which forms a sludge transfer path by vibration above the casing 4.
A duct 16 is fixed as a hot air supply means so as to open to a space below the current plate. A blower and a heat source (not shown) are connected to this, and hot air is sent from below to the flow straightening plate 17 and is guided to the outside through an exhaust duct at an upper portion which will be described later. Hot air flows from below the current plate 17 to above.

As shown in FIG. 4, the rectifying plate 17 is composed of a number of strips 18, and a slit 19 is formed between the strips 18. As shown in FIG. 6, the slit 19 has an upper portion formed as a narrow slit portion 19b which is linear in the vertical direction, and a lower portion formed with a tapered opening portion 19a connected thereto. As a result, the effect of flowing hot air from below to above is increased, and the effect of clogging the slit 19 as the sludge dries in the slit 19 is minimized.

Next, the chain belt portion 2 provided at the upper portion will be described.

A rectangular casing 22 is also provided in the chain belt section 2, and a chain belt 32 is disposed in the casing 22. This is composed of driving sprocket wheels 31a, 31b, driven sprocket wheels 32a, 32b on the left side in FIG. 2, and chains 36, 37 wound around these sprocket wheels 31a, 31b, 32a, 32b. ,
37, a roller 35 is rotatably supported between the pair of chains 36, 37 at a predetermined interval as shown in FIG. 5, and the roller 35 includes a guide frame 33 fixed to the inner wall of the casing 22, It is configured to be guided as shown in FIG.

In the present embodiment, three sets of leaf springs 39a and 39b are fixed at a predetermined pitch to the chain belt 32 configured as described above. That is, the leaf spring attachment members 38a and 38b are further attached to the above-mentioned chain 36 via an attachment member, and three sets of leaf springs 39a and 39b are alternately arranged at predetermined intervals as shown in FIG. The mounting member 3 is deviated in one direction and stands upright.
8a, 38b so that the chain belt 32 travels in the directions indicated by arrows A and B shown in FIG.
31b is driven.
The upper sludge is uniformly distributed over the entire width of the strip 18.
The lower ends of 9a and 39b are scraped off.

As shown in FIG. 1, the casing 22 of the above-described chain conveyor section 2 has a pair of columns 20,
A motor 26 for driving a chain belt 32 is attached to one of the columns 21 as shown in FIG. 1, and the drive shaft 29 is fixed to a sprocket wheel 28. The chain 27 is wound between this and a sprocket wheel 53 that is coaxial with the drive sprocket wheels 31a and 31b and that is disposed outside the casing 22. The driving force of the sprocket wheel 53 is transmitted to the driving sprocket wheels 31a and 31b via the shaft 25.

Further, according to the present embodiment, the rotation speed of the motor 26, that is, the transfer speed of the chain belt 32 in the directions A and B is adjusted to be substantially equal to the transfer speed due to the vibration of the sludge on the rectifying plate 17. . That is, the lower ends b of the leaf springs 39a and 39b attached to the lower traveling portion of the chain belt 32 for transporting the leaf springs advance in the B direction while slightly pressing the rectifying plate 17. The movement speed is adjusted so that the transfer speed due to the vibration of the sludge m scraped off at the lower end is substantially the same.

The casing 22 of the chain conveyor section 2
An exhaust duct 24 is fixed to the upper wall portion as shown in FIG. 1, whereby the casing 22 of the chain conveyor section 2 has a closed structure, and the casing 4 of the vibration transfer section 3 also has a closed structure. However, the assembly as shown in FIG. 3 forms a hermetic structure as a whole, so that the hot air blown from the duct 16 below the current plate 17 is sucked into the upper duct 24, and the sludge m on the current plate 17 becomes It is configured to be fluidized efficiently and to efficiently exchange heat with hot air.

The vibration dryer for the municipal solid waste treatment plant according to the embodiment of the present invention has been described above. Next, this operation will be described.

Although not shown, ash is discharged from the incinerator of the municipal solid waste treatment plant, and the municipal solid waste sludgeted by the water sprayed on the ash is indicated by an arrow at the sludge supply port 50 shown in FIGS. As supplied.

According to the present embodiment, the vibration drive unit in the vibration transport unit 3 is of a crank drive type, but the casing has a vibration frequency determined by the rotation speed of the motor 11 and the diameter ratio of the pulley forming a part of the crank drive unit 12. 4 vibrates in the direction in which the coil spring 7 extends. That is, as shown in FIG. 6, the current plate 17 vibrates in the direction of arrow a. This vibration causes each band plate 18
The upper sludge m is fluidized by vibration and also fluidized by hot air that blows upward from below through the slit 19, and is transported in the direction of arrow B shown in FIG. During the transfer, heat is exchanged with the hot air and heated. Therefore, it is dried.
In the course of this transfer, the leaf spring attached to the lower running portion of the chain belt 32 is a leaf spring 39 in FIG.
The running of the chain belt 32 as shown at the lower end of b.
Direction, that is, the direction opposite to the sludge m transfer direction due to vibration
Bends in the direction . The band plate 18 vibrates with a constant amplitude in the direction of arrow a. Each point of the band plate 18 periodically transitions from a neutral point, a top dead center, and a bottom dead center. At the dead center, at least the lower end is slightly bent by the band plate 18 as shown in FIG. However, at the bottom dead center, the lower end of the leaf spring 39b is arranged so as to be slightly away from the upper surface of the band plate 18, so that the lower end may fit into the slit 19 in a certain phase with vibration. Even if the lower end is fitted without obstructing the drive of the chain belt 32 by this,
At the dead point, it has already been extracted from the slit 19.

According to this embodiment, the leaf springs 39a, 39b
The transport speed v ₁ in the arrow B is the current plate on 17 sludge transport speed v due to vibration of the m ₂ (≒ v ₁₎ and the strip 18 generally because they are the same leaf springs 39a, at the lower portion of the 39b
The upper sludge m is scraped off. Since the scraping speed is almost the same as the transfer speed by vibration, each set (a set of three) of the leaf springs 39a and 39b is arranged at a predetermined pitch. The leaf springs 39a, 39b
The sludge does not become very thin or localized between the leaf springs of each set depending on the transfer speed of each set, and each straightening is performed as if the scraping leaf springs 39a and 39b do not exist. The sludge m on the plate 17 is transferred to the right in the figure by vibration at a substantially constant uniform layer pressure. Accordingly, the sludge m is scraped off by the lower ends of the leaf springs 39a and 39b efficiently over the entire area of the current plate 17.

As described above, the ash is discharged downward as indicated by the arrow Q at a desired degree of drying through the discharge opening 51 formed at the right end of the casing 4 in FIGS. become.

The vibratory dryer for the municipal solid waste treatment plant according to the embodiment of the present invention performs the above-described operations, but has the following effects.

That is, in the municipal solid waste treatment plant, the sludge ash m is continuously supplied to the supply port 50 at a substantially predetermined ratio, and the ash m is continuously formed at the lower end of the casing 4. From 51, it is dried to a desired degree of drying and discharged to the outside as ash.

Due to the sticking on the strip 18 which has been conventionally seen due to the scraping action of the leaf springs 39a and 39b, not only does the slit 19 become clogged after a certain operation time, but also hot air is not passed from below to above, The ash does not stay on the supply side due to the sticking and does not come out from the discharge opening, and the ash can be continuously discharged with a desired degree of drying for a long time.

In FIG. 1, a pair of chains 3 is attached to the driven sprocket wheels 32a and 32b and the drive sprocket wheels 31a and 31b of the chain belt 32.
In this embodiment, a known tension adjusting device 52 is connected to the driven sprocket wheels 32a and 32b. As a result, a known adjusting operation can be performed by adjusting the screws and nuts so that a predetermined tension is applied to the chains 36 and 37 during maintenance. Thus, at the start of use of the vibration dryer 1, the sprocket wheels 28, 53, 31a, 31b are adjusted by adjusting the speed of the electric motor 26.
In this embodiment, the rectifying plate 1 due to vibration depends on the diameter ratio and the number of gears.
The plate springs 39a, 39b are moved so that the sled m on the plate 7 moves in the same direction at substantially the same speed. However, if the electric motor 26 is initially set, the plate springs 39a, 39b are set as long as the tension is constant. Can be set to the desired speed as described above.

In the above embodiment, the sludge m is transferred by vibration on the rectifying plate 17, but since the vibration angle is larger than that of a normal vibration transfer device, the transfer speed is small but the vertical speed component is large. Therefore, it is greatly affected by fluidization,
It promotes the heat drying effect.

In the above embodiment, as shown in FIG. 5, the leaf spring mounting members 38a and 38b achieve a stable running state by the roller 35.
When a and 39b are traveling below the traveling portion of the chain belt 32, the lower end thereof can press the rectifying plate 17 in a predetermined state to perform a desired sludge scraping action. Even if the chain belts 36, 37 have a predetermined tension, depending on their running, the leaf springs 39a, 39b
Moves up and down, and the lower end of the current plate 1
Although the roller 7 cannot be pressed or scraped, the guide action of the roller 35 can give a desired scraping action accurately.

Although the embodiment of the present invention has been described above, the present invention is, of course, not limited to this, and various modifications can be made based on the technical concept of the present invention.

For example, in the vibration dryer of the above embodiment, the crank drive is used as the vibration drive unit.
Without being limited to this, various conventionally known driving units may be applied, for example, an electromagnet driving unit or a driving unit using a vibration motor. In the above embodiment, the current plate 1
In FIG. 7, the band plate 18 is connected with a slit 19 interposed therebetween. However, instead of this, a rectifying plate having a large number of round hole openings with a certain opening ratio, such as punch metal, may be used in the present invention. Of course, it is applicable.

In the above embodiment, the leaf spring 3 for scraping is used.
Although 9a and 39b are used as a set of three sheets, it is needless to say that the width of these leaf springs may be increased, for example, to be equal to the width of the band plate 18, and scraped off with one sheet spring. Further, a large number of leaf springs, for example, five or six leaf springs may be set and scraped.

In the above embodiment, the leaf spring is a general leaf spring, that is, made of steel. However, the leaf spring is not limited to this, and has elasticity such as synthetic resin, for example, reinforced plastic (FRP). It may be made of a material.

In the above-described embodiment, the present invention is applied to the heating and drying of sludge using the municipal solid waste treatment plant. However, the present invention is of course applicable to the heating and drying of other materials.

[0036]

As described above, according to the vibration dryer of the present invention, the material to be dried is such as sludge of municipal waste.
That is, even if the material is like ash moistened by the cooling water after incineration, the heating and drying action is continuously guaranteed without clogging the opening of the current plate.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a vibration dryer applied to a municipal solid waste treatment plant according to an embodiment of the present invention.

FIG. 2 is a partially broken plan view of the vibration dryer.

FIG. 3 is a sectional view taken along line [3]-[3] in FIG.

FIG. 4 is a sectional view of a main part of the vibration dryer.

FIG. 5 is a sectional view of a main part of a chain belt conveyor of the vibration dryer.

FIG. 6 is an enlarged vertical sectional view of a main part of the vibration dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration dryer 4 Casing 11 Motor 12 Crank drive part 17 Rectifier plate 18 Strip plate 19 Slit 27 Chain 31a Drive sprocket wheel 31b Drive sprocket wheel 32 Chain belt 32a Drive sprocket wheel 32b Drive sprocket wheel 36 Chain belt 37 Chain belt 39a Plate spring 39b Leaf spring 53 Sprocket wheel

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F26B 17/02 F26B 17/26

Claims (2)

(57) [Claims] 1. A casing on which a rectifying plate having a large number of openings is stretched, an air supply means for sending hot air from below to above the rectifying plate, and an upper portion along the rectifying plate. And a chain belt attached with a leaf spring standing upright at a predetermined pitch, vibrating the casing to transfer the material to be dried on the rectifying plate, and a lower traveling portion of the chain belt. It travels in the same direction as the transfer direction due to the vibration, and the traveling speed of the leaf spring is
Approximately equal to the material transport speed due to vibration of the Nagareban, with該被dried material is heated by the hot air in the transport course of said the dried material, and the running direction of the chain belt
3. A vibration dryer in which the lower end of the leaf spring bent in the opposite direction is rubbed. 2. An upper portion of the opening is vertically linear.
The lower part has an opening larger than the upper part, and
2. The vibration according to claim 1, wherein the vibration is tapered.
Dryer.