JPS642428B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crushing mixer, and more specifically to a rotating machine that crushes and mixes sewage purification sludge, dewatered cakes, etc. generated from wastewater treatment of civil engineering works such as tunnels, or wastewater treatment of crushing plants. This relates to a type crushing mixer.

BACKGROUND ART In recent years, it has been known that sewage purification sludge, sludge generated during food manufacturing processes, etc. contain large amounts of organic matter and can be turned into useful compost by fermentation treatment. Therefore, various compost production systems have been devised. . Among these, it is known that a system of dehydrating sludge, solidifying it as a dehydrated cake, crushing the dehydrated cake, mixing it with fermented seed sludge, and aeration fermentation is effective.

Generally, in this system, a crushing mixer is used as equipment that simultaneously performs two steps: crushing the dehydrated cake and mixing it with fermented seed sludge.

A conventional rotary crushing mixer has a rotating shaft rotated by a motor inserted into a circular drum that is placed horizontally on a base and closed at both ends. A cutting blade was attached, and the rotating shaft for crushing and mixing was rotated to crush the dehydrated cake in the circular drum and mix it with the seed sludge.

However, in such a conventional crushing mixer, the rotation speed near the rotation axis of the crushing and mixing blade is slow, and sufficient crushing and mixing is not achieved, and the dehydrated cake adheres and solidifies, and the machine becomes unable to rotate in a short period of time. The problem was that the rate was extremely low.

Similar problems also occurred in the crushing and mixing process when manufacturing roadbed materials from dehydrated cakes generated during wastewater treatment.

This invention was made in view of the above problems, and includes a horizontal cylindrical drum with a supply port formed at the top and a discharge port formed at the bottom, and a drum that penetrates the drum while aligning with the axis of the drum. A rotating shaft supported by the base and a main motor for rotationally driving the rotating shaft are provided on the base, and two closing plates for closing both side openings of the drum are fixed to the rotating shaft so as to be integrally rotatable. A plurality of blade attachment shafts, each connected to a separate sub-motor, are spanned between two blocking plates in parallel to the rotation axis, and the structure rotates while revolving around the rotation axis. By providing a crushing mixer in which a mixing rotary blade is provided and each auxiliary motor is connected to a rotation adjustment means that independently controls the rotation speed and rotation direction of each auxiliary motor,
The purpose is to solve the above problems.

The present invention will be explained below based on the drawings.

1 to 4 are diagrams showing a first embodiment of this invention.

In the figure, reference numeral 1 denotes a base, and a horizontally raised cylindrical circular drum 2 is horizontally disposed on one side of the base 1 by a casing support 3 erected on the base 1. This circular drum 2 has a material supply port 2 at the top.
a, a product discharge port 2b at the bottom, openings 2c at both ends, and a hopper 4 erected at the material supply port 2a. A supply conveyor 5 is disposed above the hopper 4, and a transport conveyor 6 is disposed below the assembled product discharge port 2b inserted into the hole 1a of the base 1.

Further, a bearing support frame 7 is erected at one end of the base 1, and a bearing 8 is fixed to the bearing support frame 7. Base 1 is located near the other end of base 2.
A movable base 9 is provided to run freely on the movable base 9, a bearing support frame 10 and a motor support frame 11 are erected on the movable base 9, a bearing 8 is fixed to the bearing support frame 10, and a public support frame 11 is mounted on the motor support frame 11. A repurposed main motor 12 is provided. 13 is a wheel for moving the movable base 9 on the rail 1b on the base 1; 14 is a wheel for moving the movable base 9 on the rail 1b on the base 1;
This is a clamp for engaging and blocking the protrusion 9a provided on the holder.

A rotating shaft 15 that extends through the circular drum 2 and coincides with the axis of the circular drum 2 is rotatably supported by the bearing 8 fixed to the bearing support frame 7 and the bearing 8 fixed to the bearing support frame 10. A central shaft 17 is inserted into the rotating shaft 15 via two spaced apart bearings 16, and one end of the central shaft 17 exposed to the outside is connected to the bearing support frame 7.
It is pivotally supported by a bearing 8 fixed to. Further, a sprocket 18 is attached to a thin shaft portion 15a supported by a bearing 8 fixed to a bearing support frame 10 on the rotating shaft 15, and a main motor 12 provided on the sprocket 18 and the motor support frame 11 is connected to the sprocket 18.
It is connected to the motor shaft 12a by a chain 19. Therefore, by the rotation of the main motor 12, the rotating shaft 15 is rotated through the chain 19, with the thin shaft portion 15a being received by the bearing 8, and the other end being supported by the two bearings 16 of the central shaft 17. .

A rotating shaft 1 inserted through a circular drum 2
5 is provided with a pair of drum closing plates 21, 21 that respectively close the openings 2c at both ends of the circular drum 2 to form a crushing mixing chamber 20. Four blade attachment shafts 22 are rotatably supported on these drum closing plates 21, 21 at equal angular intervals with respect to the rotating shaft 15 so as to be spanned between these drum closing plates 21, 21. In addition, a base 1 is attached to the rotating shaft 15.
A motor supporting disk 23 is provided around the externally exposed portion of the other end. An auxiliary motor 24 for autorotation is attached to this motor support disc 23 at a position corresponding to each blade attachment shaft 22, and the motor shaft 24a of each auxiliary motor 24 and the corresponding blade attachment shaft 22 are connected by a coupling 25. are connected via. Reference numeral 26 denotes a slip ring provided at the end of the thin shaft portion 15a of the rotating shaft 15, and is connected to each sub-motor 24 via a cable wire 27.
28 is a brush that comes into contact with the slip ring 26. The coupling 2 is rotated by the rotation of the auxiliary motor 24.
The blade mounting shaft 22 rotates via the shaft 5. Each auxiliary motor 24 is connected to an inverter (not shown) serving as a rotation adjustment means that independently controls the rotation speed and rotation direction of each auxiliary motor 24, and a sequence is set up to make the rotation speed variable. ing.

Each blade attachment shaft 22 has a large number of crushing and mixing rotary blades 29 implanted in a comb-like shape at intervals in the axial direction in a portion located within the crushing and mixing chamber 20, and four such rows are installed. They are installed radially at equal angular intervals. The length of each crushing and mixing rotary blade 29 is set so that its tip reaches a position near the inner peripheral surface of the circular drum 2.

On the other hand, a plurality of fixed blades 31 are attached to a part of the inner circumferential surface of the circular drum 2 so as to protrude at predetermined intervals so as to form comb teeth toward the inside.
It is designed so that it can alternately enter and pass between the crushing and mixing rotary blades 29 forming comb teeth provided on the blade attachment shaft 22. The fixed blades 31 are attached to the circular drum 2 by fastening a blade mounting plate 32 having a plurality of fixed blades 31 to the inner peripheral surface of the circular drum 2 with bolts 33 and nuts 34.

Next, the action will be explained.

The dehydrated cake conveyed by the supply conveyor 5 is supplied from the hopper 4 above the circular drum 2 through the material supply port 12a into the circular drum 2, that is, into the crushing and mixing chamber 20. At this time, the rotating shaft 15 is rotated by the rotation of the main motor 12, and the pair of drum closing plates 21, 21 and the motor supporting disc 23 fixed thereto are rotating integrally. Further, the blade attachment shaft 22 is rotated by the rotation of the sub-motor 24 provided on the motor support disc 23. Therefore, in the crushing mixing chamber 20, the blade mounting shaft 22
The crushing and mixing rotary blade 29 attached to the crushing and mixing blade 29 performs planetary motion while rotating. As shown in FIG. 3, the upper and lower blade mounting shafts 22, 22 arranged in the circular drum 2 rotate in different directions at the top and bottom, while the blade mounting shafts 22, 22 arranged on the left and right rotate in the same direction. .

The dehydrated cake supplied into the crushing mixing chamber 20 is
After being crushed and mixed by the crushing and mixing rotary blade 29 that performs planetary motion while rotating, it is discharged from the product discharge port 2b to the conveyor 6, and is sent to the next process by the conveyor 6. At this time, the rotational speed of the crushing and mixing rotary blade 29 is set to an appropriate value according to the type of dehydrated cake that is the raw material, the amount of dewatering, the amount of processing, etc. Further, when, for example, fermented seed sludge is supplied together with the dehydrated cake into the crushing and mixing chamber 20 from the supply conveyor 5, these are crushed and mixed, and the crushing and mixing rotary blade 2
The number of rotations at No. 9 is set to an appropriate value in consideration of the above-mentioned conditions.

For example, when producing compost, the moisture content suitable for fermentation is approximately 60%, and in order to crush and mix such high moisture adhesive raw materials, the rotation speed (rotation speed of the crushing and mixing rotary blade 29) is required. By setting a low value, it is possible to prevent the raw material from becoming doughy. In addition, the moisture content of cake-like compost that has undergone the fermentation process is approximately 40%, and by setting a high rotation speed to re-pulverize this, it is possible to produce products with uniform particle size in a short time. .

Since the crushing and mixing rotary blade 29 revolves around the rotating shaft 15 while rotating within the crushing and mixing chamber 20, there is no longer a so-called dead zone where the crushing and mixing rotary blade 29 cannot reach. The rotational speed does not decrease near the shaft, and even more thorough crushing and mixing are achieved.
Adhesion and solidification of the dehydrated cake on the inner peripheral surface of the circular drum 2 is prevented.

Note that, as shown in this embodiment, when the rotation directions of the respective crushing and mixing rotary blades 29 are made different, or when the rotation speeds of the respective crushing and mixing rotary blades 29 are relatively changed, they may be rotated in the same direction. Compared to a device that rotates at the same number of rotations, it is possible to improve the crushing efficiency, reduce the adhesion of raw materials to the drum, and further increase the operating efficiency. Furthermore, even if some dehydrated cake or the like adheres to the crushing and mixing rotary blade 29, the crushing and mixing rotary blade attached to each blade attachment shaft 22 can be easily removed by the planetary movement of the rotary blade 29 while rotating. 29 is the fixed blade 31,
When passing between 31, the crushing and mixing rotary blade 29,
The dehydrated cake and the like adhering between 29 and between fixed blades 31 and 31 are scraped off.

Furthermore, in this embodiment, a center shaft 17 is built into the rotating shaft 15 via a bearing 16, and the base 1 is inserted in the longitudinal direction of the center shaft 17.
The rotating shaft 15 can be slid toward the other end. On the other hand, the rotating shaft 15
The movable base 9, on which the bearing 8 supporting the thin shaft portion 15a of the rotary shaft 15a is mounted, is fixed to the base 1 by the clamp 14 while the rotating shaft 15 and the blade mounting shaft 22 are rotating, but the clamp 14 is released. By doing so, the wheels 13 can be run and the base 1 can be moved. In addition, a position near the motor support plate 23 is pushed up by the rotary shaft 15 by a jack up mechanism (not shown), and the rotary blade 29 for crushing and mixing is pushed up.
The load of the drum closing plate 21 supporting the blade mounting shaft 22 with the attached blade can be transferred to the movable table 9. Therefore, when it becomes necessary to repair or clean the inside of the crushing mixing chamber 20, the clamp 14 is released and the movable table 9 is moved toward the other end of the base 1, that is, to the right in the figure. By sliding the rotary shaft 15 with respect to the central shaft 17, the crushing and mixing rotary blade 29 is exposed from inside the circular drum 2 to the outside, so that repair or cleaning work can be easily performed.

FIG. 5 is a diagram showing a second embodiment of the invention. This embodiment eliminates the need for the movable table 9 of the first embodiment, and the rotary blade 2 for crushing and mixing is surrounded by a closing plate 21.
The rotary blade 29 and its interior are easily repaired and cleaned by moving the structure such as 9 on the axis. That is, the main motor 12, the bearing support frame 10, and the motor support frame 11 are fixed to the base 1 so as not to move, and the rotating shaft 15 is connected to the central shaft 38 by partially fitting into its end. It is rotatably supported by a bearing 8 of a support frame 7. A cylindrical member 39 that passes the central axis between the two closing plates 21 and serves as a seal and a spacer is disposed, and a thick wall on the outside of the closing plate 21 allows the central axis 3 to pass through.
An annular member 36 that can be slid freely on the 8 is fixedly attached to ensure strength. This annular member 36 is provided with a groove 36a that engages with the long key 35 provided on the central shaft 38, and rotates a group of items including the crushing and mixing rotary blade 29 and the closing plate 21.
When necessary, the thrust direction positioning lever 37 can be pulled out and slid in the axial direction. Therefore, as in the first embodiment, the crushing and mixing rotary blade 29
It can be easily repaired and cleaned because it rotates and revolves, crushes it sufficiently, and can be pulled out. Although the center shaft 38 is longer than in the first embodiment, the movable table 9 and the like are not required, making the device inexpensive.

As explained above, according to this invention,
Each part in the drum is evenly crushed and mixed by each crushing and mixing rotary blade, which provides a more sufficient crushing and mixing effect than before, and also reduces adhesion and solidification of dehydrated cake, etc., improving the operating rate. is obtained.

In addition, regardless of the revolution speed of the rotating shaft by the main motor, the rotation speed and rotation direction of the blade attachment shaft by each auxiliary motor can be set and adjusted independently, so the rotation direction of each crushing and mixing rotary blade can be adjusted independently. By changing the rotation speed of each rotary blade for crushing and mixing, or by relatively changing the rotation speed of each rotary blade for crushing and mixing, it is possible to improve the crushing efficiency and to further reduce the adhesion of raw materials to the drum, which is extremely effective in practice.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the crushing mixer of the present invention, FIG. 1 is a front view of the crushing mixer, and FIG. 2 is a partially omitted cross-sectional view of the crushing mixer. 3 is a side view with half of the crushing mixer in cross section, FIG. 4 is a partial sectional view showing the relationship between the rotating blade for crushing and mixing and the fixed blade, and FIG. 5 is a second embodiment of the invention. FIG. 2 is a front view similar to FIG. 2 illustrating an example; DESCRIPTION OF SYMBOLS 1...Base, 2...Circular drum, 2a...Material supply port, 2b...Product discharge port, 22...Blade mounting shaft, 24...Sub-motor, 29...Rotary blade for crushing and mixing.

Claims (1)

[Claims] 1. A horizontally placed cylindrical drum having a supply port formed in the upper part and a discharge port formed in the lower part and fixed to a base, and a drum that passes through the drum and is supported on the base while being aligned with the axis of the drum. and a main motor that rotationally drives the rotating shaft, and two closing plates that close both side openings of the drum are fixed to the rotating shaft so as to be integrally rotatable. Between the blocking plates, a plurality of blade mounting shafts each connected to a separate sub-motor are spanned parallel to the rotational shaft and rotated while revolving around the rotational shaft, and a plurality of blade mounting shafts are connected to each of the blade mounting shafts. The crushing and mixing device is characterized in that each of the auxiliary motors is provided with a plurality of rotary blades for crushing and mixing, and each of the auxiliary motors is connected to a rotation adjustment means that independently controls the rotation speed and direction of rotation of each auxiliary motor. Machine.