JPH09206795A - Crushing device for dehydrated sludge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily crush excavated soil by using a simple device. SOLUTION: An upper material base plate 4 having an aperture 3 for passing crushed matter and a flat front surface is fixed to the inside of a vertical cylindrical body 2 successively installed to the lower part of a hopper 1. The upper part of this upper material base plate 4 is provided with a supplying device 5 for supplying dehydrated sludge to the aperture 3 for passing the crushed matter. A lower material supporting plate 7 which is rotated around its vertical axis by a driving device 6 is freely rotatably installed below the upper material base plate 4 apart a spacing in parallel therefrom. A turnable crushing member 9 which is rotated by a driving device 8 fixed to the vertical type cylindrical body 2 is disposed between the upper material base plate 4 and the lower material supporting plate 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering sludge crushing device for crushing dewatered sludge fed into a hopper and continuously sending it into particles.

[0002]

2. Description of the Related Art The penetration rate of sewerage in Japan is sometimes over 90% in large cities, but the penetration rate in Japan as a whole is about 50%, which is said to be low among developed countries. It is expected that the sewer penetration rate will continue to improve. However, on the other hand, with the spread of this sewer system, the amount of sewage is increasing and the amount of sewage sludge is also increasing. It will be a major issue in the future whether efficient sludge treatment will be included, including effective use of this. ing. At present, sewage sludge is partially effectively used, including fertilizers and construction materials, but further research and improvement are being attempted. However, 24% of the total sewage sludge that is effectively used by recycling technology is used for landfill disposal. By the way, since sewage sludge (organic sludge) is generally taken out as sludge solid matter as industrial waste, including the case where it is effectively used by recycling technology, for example, the treatment step shown in FIG. A process of separating the product from the product is performed. In FIG. 25, the sewage sludge (drainage) 75 is separated into water and raw sludge 77 in the first sedimentation basin 76. The water is further boiled in the bubbling tank 78, and then further separated in the second settling tank 79, and thereafter,
The water 80 subjected to the secondary treatment is discharged through the disinfection treatment step 81, and the separated sludge 82 is sent to the concentration tank 83. The raw sludge 77 in the first settling basin 76 is also sent to the concentration tank 83 and separated into water and the concentration sludge 84, and methane gas is further generated in the digestion tank 85 to produce the digested sludge 86, and then the filter press, Dehydrator 8 consisting of belt press, decanter, etc.
Dehydrated sludge (dehydrated cake) 88 is produced by 7.
Although this dehydrated sludge 88 is a solid sludge, it has a high water content of about 80% and cannot be reused as it is, nor can it be dumped into the ocean. In many cases, it is further incinerated in an incinerator 89. After that, kneading by adding a solidifying agent, etc.
It is sent to the final disposal site through the solidification process 90.

[0003]

Conventionally, the dehydrated sludge 88 separated from the water by the dehydrator 87 is the incinerator 89.
Solid sludge of a certain size that has been processed in the kneading / solidifying step 90 is obtained, but this processing step requires a large amount of equipment and energy cost, and has a certain size for reuse. There is a problem that a processing step of crushing lump-shaped solid sludge into small pieces is required, which further increases the cost. An object of the present invention is to provide a dewatering sludge crushing device that solves the above problems.

[0004]

In order to advantageously solve the above problems, in the dewatering sludge crushing apparatus of the present invention,
Inside the vertical cylindrical body 2 connected to the lower part of the hopper 1, an crushed material passage opening 3 and an upper material support plate 4 having a flat upper surface are fixed, and on the upper part of the upper material support plate 4,
A supply device 5 for supplying dewatered sludge to the crushed material passage opening 3 is provided, and below the upper material support plate 4, a drive device 6 is used to center the vertical axis at intervals in parallel therewith. A rotating lower material support plate 7 is rotatably provided, and is rotated by a drive device 8 fixed to the vertical tubular body 2 between the upper material support plate 4 and the lower material support plate 7. A rotating crushing member 9 is provided.

[0005]

1 to 24 show an embodiment of the present invention, in which a rod 66 made of a large number of strip-shaped steel plates located on a vertical plane is inclined and has small intervals. The steel ring 23 is fixed to the tip end of each rod 66 by welding, and a large number of rods are arranged in parallel with the tip end of the rod 66 in the front-rear direction. The steel ring 24 is fixed by welding to the tip of a rod 67 made of a large number of strip steel plates inclined at the same angle as 66, and the steel ring 23 fixed to the tip of the rod 66 and the tip of the rod 67. The rings 24 fixed to the portions are alternately arranged, and the support shaft 68 is inserted through the ring 23 at the tip of the rod 66 and the ring 24 at the tip of the rod 67, and , Consisting of each rod 66 Second to one sieve 69 made of the rod 67
The sieve 70 is pivotally attached so as to be openable and closable.

Guide rollers 19 and 20 which move along a guide rail 18 extending in the left-right direction are rotatably attached to both ends of the first support shaft 70 and the second support shaft 11, respectively. A plurality of small-diameter shaft portions are provided at intervals in the front-rear direction on the first support shaft 70 to which the base end portion of 66 is fixed by welding, and the tubular bearing 27 is fitted to each of the small-diameter shaft portions. The operating member 71 is fitted to the cylindrical bearing 27. That is, the tubular bearing 27 is provided with respect to the plurality of operating members 71.
The first support shaft 70 is rotatably inserted through the second support shaft 11 in which the base ends of the plurality of rods 67 are fixed by welding.
In addition, a plurality of small diameter shaft portions are provided at intervals in the front-rear direction, a cylindrical bearing 27 is fitted to each small diameter shaft portion, and the operating member 12 is fitted to the cylindrical bearing 27.

That is, for the plurality of operating members 12,
The second support shaft 11 is rotatably inserted through the cylindrical bearing 27, and the guide roller 19 and the guide roller 20 are rotatably provided at both front and rear ends of the first support shaft 70 and the second support shaft 11. Installed. On the front and back sides of the frame 72,
A guide rail 18 extending in the left-right direction is provided, and the guide rollers 19 and 20 are supported by the guide rail 18. The guide rail 18
Stoppers 45 are provided on both the left and right sides of each of the rods 66,
The guide rollers 19, so that 67 has a predetermined V shape.
20 is adjusted in position. Further, the movable lid plates 64 are arranged on both left and right sides of the upper portion of the frame 72, and the support rollers 6 attached to the outer end side of the movable lid plate 64 in the front-rear direction.
5 is placed on the frame 72, and each movable lid plate 64 thereof is
The inner end side in the left-right direction is supported by being fixed to the upper portions of the operation members 71 and the operation member 12 by bolts or the like. Therefore, when the rods 66 and 67 are opened and closed, the movable lid plates 64 can be opened and closed at the same time.

A supply chute 28 is provided above the hopper 1 surrounding the first sieve 69 and the second sieve 10.
A vertical cylinder 2 is integrally provided at a lower portion of the hopper 1, and an upper material support plate 4 having an opening 3 for passing crushed material is provided inside the vertical cylinder 2 at a position where it does not overlap in the vertical direction.
Is fixed and a plurality of lower material support plates 7 are rotatably provided horizontally, and the vertical cylindrical body 2 is vertically spaced and at the same time is circumferentially spaced. A large number of rotation drive devices 8 composed of pressure motors are fixed, and each rotary shaft 2 is rotated by the drive device 8.
6 is provided so as to extend in the radial direction of each material supporting plate 4, 7, a plurality of rotary crushing members 9 are fixed to each rotating shaft 26, and the screw conveyor device 22 facing the lower discharge port 21 is The screw conveyor 30 is housed in the conveyor pipe 29 to form the screw conveyor 30.
An arm 32 fixed to the lower part of 0 and a bracket attached to the lower part of the vertical cylinder 2 are pivotally attached by a horizontal shaft 33,
The lower outlet 21 of the vertical cylinder 2 and the conveyor tube 2
The lower inlet 31 of 9 is fitted. A driving device 63 is provided at the upper end of the conveyor tube 29.

One end of a link 36 is pivotally mounted via a horizontal pin 37 of a pin mounting bracket 34 fixed to the intermediate portion of the vertical tubular body 2 and fixed to the intermediate portion of the conveyor tube 29. An outer end portion of the link 38 is pivotally attached to the frame 35 by a lateral pin 39, and an inner end portion of the link 36 and an inner end portion of the link 38 are pivotally attached by a lateral pin 40. An intermediate portion in the height direction of the vertical cylindrical body 2 and an intermediate portion in the height direction of the conveyor pipe 29 are provided with a horizontal axis via a fluid pressure cylinder 41 for adjusting the inclination of the screw conveyor device 22. Is pivoted by.

A plurality of bearing fittings 47 having bearing rollers 46 (in the illustrated case, three pieces) are attached to the middle portion and the lower portion inside the vertical cylindrical body 2 in the circumferential direction, and the bearing rollers 46 in the middle portion. The lower material supporting plate 7 is rotatably supported, and the lowermost lower material supporting plate 7 is rotatably supported by the lower supporting roller 46, and the outer peripheral edge of the lower material supporting plate 7 and the vertical tube are supported. The body 2 is liquid-tightly sealed by a sealing material 48 fixed to the vertical cylindrical body 2. An exhaust pipe 43 for exhausting air and dust is connected to the vertical cylinder 2 between the lowermost lower material supporting plate 7 and the lower material supporting plate 7 arranged above the lower material supporting plate 7.

At the lower part of the lowermost lower material support plate 7, a supporting arm 49 is fixed to the inner surface of the vertical cylindrical body 2 by welding or bolts, and the supporting arm 49 is a case rotation type rotating body composed of a hydraulic motor. A portion of the drive unit 6 to which the shaft side is attached is fixed, and the lower material support plate 7 is fixed to the casing 50 side of the rotation drive unit 6 by bolts or the like. The lower cylindrical body of the cover 51 whose middle portion is widened toward the lower material support plate 7 is fixed to the upper cylindrical body of the cover 51, and the upper shaft 52 is fitted and fixed by welding or the like. The upper shaft 52 thereof is supported by the uppermost upper material support plate 4 via a bearing 53. The outer peripheral edge of the uppermost upper material support plate 4 is fixed to the inner peripheral surface of the vertical cylindrical body 2 by welding or the like. The lower material support plate 7 vertically adjacent to the lower material support plate 7 is attached to the cover 51 by a support member 54 attached to the lower surface of the lower material support plate 7 and the inner peripheral surface of the lower material support plate 7 and the cover 51. A gap is provided therebetween to form a crushed material passage opening 14 on the lower side.

On the inner surface of the vertical cylindrical body 2, a vertical plate 55 for an improved soil discharge guide is arranged so as to be close to the upper surface of the lowermost lower material support plate 7 and close to the lower discharge port 21.
Are fixed by welding or the like. The upper shaft 5
A guide member 5 having a conical guide slope surface at the upper end of 2.
6 are attached to the guide member 56, and the base end portions of a plurality of crushed material feed plates 57 that also serve as stirring are attached at equal angular intervals. A fan-shaped shield having a hollow chamber 15 facing the crushed material passage opening 3 in the uppermost upper material supporting plate 4 at a distance from the crushed material and having an open lower portion arranged so as to be close to the feed plate 57. One end of the body 58 is fixed to the inner surface of the vertical cylindrical body 2. An upper end of a tubular body 61 is fixed to the lower surface of the upper material support plate 4, and a cutout 62 is provided obliquely downward on the lower side of the peripheral wall of the tubular body 61. A fixed amount of dewatered sludge is accommodated in a space surrounded by the shield 58, the feed plate 57 adjacent to the shield 58, and the upper material support plate 4, and is supplied in a fixed amount toward the crushed material passage opening 3. The shield 58 and the feed plate 57 constitute a rotary type supply device 5. Further, a compressed air supply pipe 16 connected to the inside of the hollow chamber 15 is attached to the vertical cylindrical body 2, and compressed air is fed into the hollow chamber 15 by a pressure feeding device (not shown) such as a compressor. The dewatered sludge produced by concentrating the sewage sludge is forcibly dropped and supplied toward the crushed material passage opening 3. Although not shown, the compressed air supply pipe 16 is extended into the hollow chamber 15 and a plurality of air ejection holes are provided in the lower portion of the compressed air supply pipe 16, and the air ejection holes are located below the air ejection holes. The dewatered sludge can be forcibly dropped from the opening 3 by injecting compressed air toward the opening 3 for passing the crushed material.

Therefore, by the rotation drive device 6, the lower material support plates 7 adjacent to each other in the vertical direction, the cover 51, the upper shaft 52, and the feed plate 57 also serving as a stirrer attached to the upper end portion thereof rotate simultaneously. Is configured.

Between the uppermost material support plate 4 at the uppermost portion and the lower material support plate 7 at the middle portion, below the opening 3 for passing the crushed material, the discharge port of the improvement material supply pipe 60 is a vertical cylindrical body. Connected to 2. At the supply port (not shown) of the improving material supply pipe 60, an improving material mixed with a solidifying agent such as a polymer improving agent, lime or fly ash is supplied by a pressure feeding device (not shown) such as a compressor. As the improving material mixed with air, it is pressure-fed and supplied to the improving material supply pipe 60, and injected so as to be diffused in the vertical cylindrical body 2. Incidentally, when the construction sludge is composed of silt or clay, etc., it is necessary to mix a slightly harder one, such as sand sand, which is the core of the granulation of the improved soil, with the improved material. May be. It should be noted that the improved material mixed with air may be pressure-fed from the compressed air supply pipe 16 to supply the compressed air and the improved material to the hollow chamber 15.

When dewatered sludge obtained by concentrating sewage sludge is continuously charged into the hopper 1 using the apparatus shown in the drawing, the dewatered sludge is discharged from the crushed material passage opening 3 through the shield 58 and the feed plate 57. The sludge on the material support body 7 which is supplied in a fixed amount downward, is finely crushed and softened by the rotating crushing member 10 and mixed with the improving material, and is supplied downward from the crushed material passage opening 14 on the lower stage side. Then, it is granulated into granules while being mixed again and converted into improved soil, and is ascended and conveyed by the lower discharge port 21 and the screw conveyor device 22 and supplied to a conveying means such as a truck or a belt conveyor.

Sewage sludge was treated using the apparatus of the present invention, and the sample test results are shown in Table 1.

[0017]

[Table 1]

In the illustrated example, the hopper 1 is provided with a crushing device which also serves as the first sieve 69 and the second sieve 10. However, this is the case where the present invention is also used for excavated materials such as construction sludge. It is configured in consideration of. That is, in this case, the viscous lumps contained in the excavated material such as construction sludge are crushed by the crushing device including the first sieve 69 and the second sieve 10, and then dropped on the upper material support plate 4. . Therefore, when the purpose is to crush only the dehydrated sludge and granulate, the crushing device including the first sieve 69 and the second sieve 10 is not necessary.

According to the embodiment of the present invention, the dehydrated sludge dehydrated by the dehydrator can be processed at a very high speed, so that the dehydrated sludge is granulated in a continuous manner for 3 minutes to obtain improved soil. Because it can be converted and has wide versatility,
The gravel and mud in the mud can be crushed (pre-treated) to form a homogeneous soil and can be processed at a low cost, so excellent quantitativeness and stirring efficiency can minimize the amount of addition. Further, according to the embodiment of the present invention, since it has easy operability, the additive improving material can be automatically and proportionally compounded by a diffusion method, and further, it is easy to move and transport, so that it is simple. Mixing objectives can be achieved with various configurations of equipment and with a small space connecting device.

Further, in the embodiment of the present invention, 2
Although one lower material support plate 7 is rotatably provided and the crushing and mixing process is performed in two steps of upper and lower, in the case of carrying out the present invention, the lower material support plate 7 on the upper stage side, the drive device 8 on the upper stage side, and the rotation. The crushing member 9 may be omitted.

[0021]

According to the present invention, the crushed material passage opening 3 and the upper material support plate 4 having a flat upper surface are fixed inside the vertical cylindrical body 2 which is continuously provided at the lower portion of the hopper 1. ,
A supply device 5 for supplying dehydrated sludge to the crushed material passage opening 3 is provided above the upper material support plate 4, and is spaced below the upper material support plate 4 in parallel therewith. A lower material supporting plate 7 which is rotated around a vertical axis by a drive device 6 is rotatably provided, and the vertical cylindrical body 2 is provided between the upper material supporting plate 4 and the lower material supporting plate 7. Since the rotary crushing member 9 rotated by the fixed drive device 8 is provided, the dehydrated sludge can be easily solidified and crushed into granules by using a simple and small device. When recycling and reusing dewatered sludge, the treatment process can be simplified compared to the conventional method.
Moreover, the processing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a dewatering sludge crushing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

3 is a cross-sectional plan view of FIG.

FIG. 4 is a side view of FIG. 1;

5 is a vertical cross-sectional front view showing the upper portion of FIG. 1 in an enlarged manner. FIG.

FIG. 6 is a vertical cross-sectional front view showing a case where the jack is extended and a crushed material is crushed by a screen bar.

FIG. 7 is a plan view of FIG. 1;

FIG. 8 is a cross-sectional plan view of FIG.

FIG. 9 is a vertical cross-sectional side view showing the upper portion of FIG. 1 in an enlarged manner.

10 is a partially cross-sectional plan view showing an enlarged left side portion of FIG. 1. FIG.

11 is a partial cross-sectional plan view showing a right side portion of FIG. 1 in an enlarged manner. FIG.

FIG. 12 is a partial cross-sectional plan view showing the pivotally connecting portions of the left and right screen bars.

FIG. 13 is a vertical sectional front view showing a lower crushing portion.

FIG. 14 is a vertical cross-sectional front view showing a crushed portion in the lower center.

FIG. 15 is a vertical cross-sectional front view showing the vicinity of the fixed quantity supply section and the improvement material supply section in FIG.

FIG. 16 is a cross-sectional plan view showing a first-stage crushing blade.

FIG. 17 is a cross-sectional plan view showing the second-stage crushing blade and the material dropping opening in FIG. 1.

FIG. 18 is a cross-sectional plan view showing the crushing blades of the second stage and below and the material dropping openings.

FIG. 19 is a partially longitudinal front view showing a crushing blade of the second stage and below.

FIG. 20 is a cross-sectional plan view showing the relationship between the crushing blades of the second stage and below and the driving blades.

FIG. 21 is a cross-sectional plan view showing a conveyor for crushed material.

FIG. 22 is a partial vertical cross-sectional side view showing a state when the transport conveyor is tilted.

FIG. 23 is a cross-sectional plan view showing a state where the transport conveyor is tilted to the maximum.

FIG. 24 is a partially cutaway cross-sectional plan view showing a pivot portion of a transfer conveyor.

FIG. 25 is a flowchart showing a conventional sewage sludge dewatering process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hopper 2 Vertical cylinder 3 Crushed material passage opening 4 Upper material support plate 5 Supply device 6 Drive device 7 Lower material support plate 8 Drive device 9 Rotating crushing member 10 Second sieve 11 Second spindle 12 Operation member 13 Second fluid pressure cylinder 14 Opening for passage of crushed material on the lower side 15 Hollow chamber 16 Compressed air supply pipe 18 Guide rail 19 Guide roller 20 Guide roller 21 Lower discharge port 22 Screw conveyor device 23 Ring 24 Ring 26 Rotation shaft 27 Tube -Shaped bearing 28 Supply chute 29 Conveyor pipe 30 Screw conveyor 31 Lower inlet 32 Arm 33 Horizontal shaft 34 Pin mounting bracket 35 Pin mounting bracket 36 Link 37 Horizontal pin 38 Link 39 Horizontal pin 40 Horizontal pin 41 Fluid pressure cylinder 43 Exhaust pipe 44 times Driving device 45 Stopper 46 Bearing roller 47 Bearing 48 Sealing Material 49 Support Arm 50 Casing 51 Cover 52 Upper Shaft 53 Bearing 54 Supporting Member 55 Vertical Plate for Guide 56 Guide Member 57 Feeding Plate 58 Shielding 60 Improvement Material Supply Pipe 61 Cylindrical Body 62 Notch 63 Driving Device 64 Movable Lid Plate 65 Supporting roller 66 Rod 67 67 Rod 68 Spindle 69 1st sieve 70 1st spindle 71 Operating member 72 Frame 73 1st fluid pressure cylinder 75 Sewage sludge 76 1st sedimentation tank 77 Raw sludge 78 Vat air tank 79 2nd sedimentation tank 80 Water 81 Disinfection treatment process 82 Separation sludge 83 Concentration tank 84 Concentration sludge 85 Digestion tank 86 Digestion sludge 87 Dehydrator 88 Dehydration sludge 89 Incinerator 90 Kneading / solidification process

Claims (1)

[Claims] 1. A crushed material passage opening 3 and an upper material support plate 4 having a flat upper surface are fixed inside a vertical cylindrical body 2 which is continuously provided at a lower portion of a hopper 1. 4, a supply device 5 for supplying dewatered sludge to the crushed material passage opening 3 is provided, and a drive device 6 is provided below the upper material support plate 4 in parallel with the supply device 5. A lower material support plate 7 rotatable about the vertical axis is rotatably provided, and the upper material support plate 4 is provided.
And the lower material supporting plate 7 between the lower material supporting plate 7 and the rotary crushing member 9 rotated by the drive device 8 fixed to the vertical cylindrical body 2.
A dewatering sludge crushing device.