JPH044880Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sludge dryer configured to agitate and transfer sludge using a plurality of spiral rotors in a drying chamber.

[Conventional technology]

Conventionally, in the above-mentioned sludge dryers, no consideration was given to the removal of sludge adhering to the rotating body. (No references can be provided.) [Problem that the invention aims to solve] As a result, in the case of the conventional structure, the agitation transfer ability and drying ability of the rotating body are easily impaired by adhered sludge. It was hot.

The purpose of this invention is to make it possible to effectively remove sludge adhering to the rotating body, to simplify the drive structure in terms of structure and control, and to make the overall structure of the device compact. The point is to aim for

[Means for solving problems]

The characteristic configuration of the sludge dryer according to the present invention is that a plurality of helical rotating bodies are arranged parallel to each other in a sludge drying chamber, and are arranged in a reverse twisting manner and adjacent to each other with approximately equal spiral pitches on the sludge inlet side. They are formed to have a diameter that allows objects to fit into each other, and on the sludge outlet side, they are formed with a smaller spiral pitch than on the sludge inlet side so that adjacent objects do not fit into each other, and the adjacent rotating bodies are moved at approximately the same speed as each other. A driving device for reversing rotation is provided, and a moving device is provided for reciprocating one of the adjacent rotating bodies in the direction of the rotation axis by a distance close to the spiral pitch on the sludge inlet side. The effects are as follows.

[Effect]

In other words, on the sludge inlet side α where sludge is particularly likely to adhere to the spiral rotating body, as shown in FIG. 3A, the adjacent spiral rotating bodies A ₁ , A ₂ and A ₂
When A ₃ are twisted in opposite directions at approximately the same pitch P ₁ and rotated in reverse at approximately constant speed, the rotating bodies A ₁ , A ₂ and A ₂ ,
A ₃ can be brought close together, and the rotating bodies A ₁ ,
A ₂ and A ₂ and A ₃ can mutually remove the adhering sludge on the side surface 6a of the blade. When one of the rotating bodies _A2 is slid, the sludge adhering to the shafts 7 can be removed from each other by the blades 6, as shown in Fig. 3B, and furthermore, as shown in Fig. 3C, , while moving by a distance l close to the spiral pitch P ₁ on the sludge inlet side α, the rotating bodies A ₁ ,
A ₂ and A ₂ and A ₃ can remove and combine the adhering sludge on the other side surface 6b of the blade.

On the other _hand , on the sludge inlet side β where sludge drying has progressed to some extent and there is no problem of adhesion, as _shown in _{FIG .}
are formed into a small diameter D ₂ so that they do not penetrate into each other,
When the aforementioned rotating body A ₂ is sliding, the adjacent rotating bodies A ₁ ,
While avoiding contact damage of A ₂ and A ₂ and A ₃ , make the helical pitch P ₂ smaller than the sludge inlet side α by a size commensurate with the amount of decrease in sludge volume due to drying on the sludge inlet side α. As a result, the entire apparatus can be downsized in the direction of the rotation axis while maintaining the agitation transfer ability and drying ability.

[Effect of idea]

As a result of the above, by manually or automatically sliding one of _the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ back and forth at appropriate timing, sludge adhesion becomes a problem. At the sludge inlet side α, the blade 6 removes the sludge attached to the parallel rotating bodies A ₁ , A ₂ and A ₂ , A ₃
This can be carried out on both the front and back sides and on all the shafts 7, thereby maintaining good agitation and transfer of sludge by the rotating bodies A ₁ , A ₂ , A ₃ at all times and maintaining high drying capacity. and furthermore, the sludge outlet side β
Together with the miniaturization of the device due to the shortening of the spiral pitch P ₂ , we were able to create a sludge dryer that is compact, easy to install, and has extremely high processing performance.

By the way, in order for the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ to remove adhering sludge from each other on the sludge inlet side α, the adjacent rotating bodies
It is possible to change the relative rotational speeds of A ₁ , A ₂ and A ₂ , A ₃ to obtain the conditions shown in Figure 3 A to C, but the structure for changing the relative rotational speed is complicated. In addition to being expensive, in order to maintain the conditions shown in Figure 3 A and C, both rotating bodies A ₁ ,
It is necessary to operate so that A ₂ and A ₂ and A ₃ are at constant speed, which leads to disadvantages such as technical difficulties in operation and automatic control.

However, according to the present invention, since the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ are always rotated at a constant speed, and one rotating body A ₂ is slid back and forth, it is not possible to change the relative rotation speed. In comparison, the moving device can be made simple and inexpensive, and the operation and control structure for changing the approaching positions of both rotating bodies A ₁ , A ₂ and A ₂ , A ₃ can be simplified.

〔Example〕

Next, examples will be shown.

As shown in FIGS. 1 and 2, the jacket 1
A sludge drying chamber 3 is formed by a casing 2 with Three rotary bodies A ₁ , A ₂ , and A ₃ each having a shaped blade 6 attached to a shaft 7 are arranged side by side in the drying chamber 3 on the left and right, and air flows through each of the rotary bodies A ₁ , A ₂ , and A ₃ . Road 8
A device 9 for supplying high-temperature fluid such as steam or oil is connected to the jacket 1 of the casing 2 by a supply pipe 10a and a recovery pipe 11a, and also connects the flow path 8 of the rotating bodies A ₁ , A ₂ , A ₃ to the jacket 1 of the casing 2. Supply pipe 10 to
b, the recovery pipe 11b is connected to the rotary joint 12, and the sludge from the supply path 4 is agitated and transferred toward the discharge path 5 by the rotating bodies A ₁ , A ₂ , and A ₃ while the jacket 1 and It is configured to be heated and dried by the high temperature fluid in the flow path 8.

The parallel rotating bodies A ₁ , A ₂ , A ₃ are arranged on the sludge inlet side α
, the adjacent ones _{A 1 ,} A ₂ and
A ₂ and A ₃ are formed to have a diameter D ₁ that fits into each other, and adjacent ones A _{1 ,}
A ₂ and A ₂ , A ₃ are formed to have a small diameter D ₂ so that they do not fit into each other, and are connected to the rotating bodies A ₁ and A ₃ on both ends in the same direction by a reduction gear 13 and a chain 14 linked to a motor M ₁ . Connect the rotating body A 1 on one end to the rotating body A ₂ in the center and connect the reverse gear 1 to the rotating body A ₂ in the center.
5, the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ are rotated at substantially the same speed and in opposite directions.

Then, the central rotating body A ₂ is attached to the casing 2 so as to be slidable in the direction of its rotational axis, and the sliding member 16 fitted onto the central rotating body A ₂ so as to freely rotate relative to the rotating shaft 17 is attached to the rotating screw shaft 17. A pair of limit switches LS ₁ , which act on the sliding member 16 by screwing the motor M ₂ onto the rotating screw shaft 17 and interlocking the motor M 2 with the handle-equipped speed reducer 18 , the forward/reverse switching/stopping device 19 , and the chain 20 , act on the sliding member 16 . A controller 21 is provided to automatically operate the forward/reverse switching/stopping device 19 based on information from LS ₂ and the limit switches LS _{1 and LS 2 .} At the sludge inlet side α where sludge adhesion to the rotating bodies A ₁ , A ₂ , A ₃ is particularly likely _to occur, As shown in Figure 3 A to C, adjacent rotating bodies A ₁ , A ₂ and
A ₂ and A ₃ are connected to each other on both sides 6a of the blade 6,
The sludge attached to the shaft 6b and the shaft 7 is removed from each other, and the conditions shown in FIG. 3A and 3C are maintained for a set period of time.

Also, on the sludge outlet side β where sludge drying has progressed to some extent and there is no problem of adhesion, the adjacent rotating bodies A ₁ ,
A ₂ and A ₃ are formed to have a small diameter D ₂ so that they do not enter into each other, and the sludge outlet of the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ is formed when the central rotating body A ₂ slides. While avoiding contact damage on the side β, the sludge inlet side α
By making the spiral pitch _P2 on the sludge outlet side β smaller than that on the sludge inlet side α to account for the decrease in sludge volume due to drying, the agitation transfer capacity and
The entire device is designed to be more compact in the direction of the rotational axis while maintaining drying performance.

[Another example]

Next, another example will be shown.

In forming the spiral rotating bodies A ₁ , A ₂ , A ₃ , the blades 6 of the rotating bodies A ₁ , A ₂ , A ₃ are the same as the lines applied to the rotating bodies A ₁ , A ₃ on both ends in the above embodiment. A spiral spiral, a belt spiral applied to the central rotating body _A2 , or
Spiral bodies of various structures, such as a spiral body with a combination of these, can be applied as the blades 6 of each rotating body A ₁ , A ₂ , A ₃ , and as shown in FIG. A removal member 6A may also be provided.

Further, as shown in FIG. 5, a spiral pipe serving as a blade 6 is attached to the straight shaft 7 forming the high temperature fluid flow path 8 so that both ends of the spiral pipe are connected to the high temperature fluid flow path 8. In addition, the spiral rotating bodies A ₁ , A ₂ , A ₃ may be configured so that the high temperature fluid flowing through the spiral pipe 6 enhances the sludge drying effect.
Furthermore, as an improvement, as shown in FIGS. 6 to 9, the spiral pipe serving as the blade 6 is divided into one or several pitches, and both ends of each of the divided portions are heated with high-temperature fluid. The spiral rotating bodies A ₁ , A ₂ , A ₃ may be arranged side by side on the straight tubular shaft 7 while communicating with the flow path 8. In short, the specific structure of the blades 6 can be improved in various ways. It is possible.

A plurality of rotating bodies A ₁ , A ₂ , and A ₃ may be installed.

The parallel rotating bodies A ₁ , A ₂ , A ₃ are reversely twisted with the same helical pitch P ₁ and adjacent ones are
A ₁ , A ₂ and A ₂ , A ₃ are adjacent to each other with a diameter D ₁ formed on the sludge inlet side α and a spiral pitch P ₂ smaller than _the sludge inlet _side α.
The length ratio in the rotational axis direction with the sludge outlet side β, which is formed to have a small diameter D ₂ where A ₂ and A ₃ do not penetrate into each other, can be changed as appropriate.

Further, the ratio of helical pitches (P ₂ /P ₁ ) and the ratio of diameters (D ₂ /D ₁ ) between the sludge inlet side α and the outlet side β can be changed as appropriate.

In order to reversely rotate the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ at substantially constant speeds, various types of drive configurations such as electric type and hydraulic type can be used, and these are collectively referred to as a drive device.

In order to reciprocate one of the adjacent rotating bodies A ₁ , A ₂ and A ₂ , A ₃ , one A ₂ of the adjacent rotating bodies A 1 , A 2 and A 2 , A 3 can be moved back and forth by various mechanical, electric, hydraulic, etc. manual operation configurations and drive configurations.
These are collectively called mobile devices.

The method and specific structure for heating target sludge, such as water treatment sludge and industrial waste sludge, in the drying chamber 3 can be changed as appropriate depending on the properties of the sludge, the installation status of the dryer, etc.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
Figure 1 is a plan view, Figure 2 is a side view, Figure 3 is
B and C are explanatory views of the operating state on the sludge inlet side, respectively. 4 to 9 show another embodiment of the present invention, FIG. 4 is an enlarged view showing the structure of the rotating body, and FIG.
The figure is an enlarged view showing another rotating body structure, FIG. 6 is a partially cutaway plan view, FIG. 7 is a sectional view taken along the - line in FIG. 6, and FIG. 8 is a sectional view taken along the - line in FIG. 6.
FIG. 9 is a sectional view taken along the - line in FIG. 6. 3...Drying room, _A1 , _A2 , _A3 ...Rotating body, l...
...distance, P ₁ , P ₂ ... pitch, D ₁ , D ₂ ... diameter, α
...Sludge inlet side, β...Sludge outlet side.

Claims (1)

[Scope of utility model registration request] A plurality of spiral rotating bodies A ₁ , A ₂ , A ₃ arranged parallel to each other in the sludge drying chamber 3 are reversely twisted at substantially equal spiral pitches P ₁ on the sludge inlet side α, and Adjacent items A ₁ , A ₂ and A ₂ , A ₃ are formed to have a diameter D ₁ that fits into each other, and adjacent items A ₁ are formed with a spiral pitch P ₂ smaller on the sludge outlet side β than on the sludge inlet side α. ，
A ₂ and A ₂ , A ₃ are formed to have a small diameter D ₂ that does not penetrate into each other, and the adjacent rotating bodies A ₁ , A ₂ and
A drive device is provided that rotates A ₂ and A ₃ in opposite directions at substantially constant speed, and the adjacent rotating bodies A ₁ , A ₂ and A ₂ ,
One side _A2 of _A3 is connected to the spiral pitch on the sludge inlet side α.
A sludge dryer equipped with a moving device that slides back and forth in the direction of the rotation axis by a distance l close to _P1 .