JP4772213B2 - Continuous carbonization equipment for organic waste - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous carbonization apparatus for wastes mainly rich in organic matter such as human waste processing sludge, activated sludge generated in sewage treatment facilities such as food manufacturing industry and livestock waste, buckwheat husk, and coffee grounds.
[0002]
[Prior art]
The scales of sewage treatment facilities, human waste treatment facilities and various sewage treatment facilities are increasing, and the amount of sludge generated is increasing accordingly. In order to solidify it into a useful building material or the like, there is a problem that the organic substance is mainly used and the strength cannot be obtained or the smell is bad. Attempts to use fertilizer have been made (Japanese Patent Laid-Open No. 11-116367), but the amount of fertilizer produced is large and the production is excessive. Effective utilization of sludge generated in sewage treatment sludge, human waste treatment facilities and various sewage treatment facilities is one means, but incineration is also an option as a waste treatment means. However, incineration requires countermeasures against dioxin generation and a heating source.
[0003]
In view of this, the present inventor examined a sludge continuous treatment method and apparatus, such as sewage treatment, capable of continuously carbonizing sludge generated in large quantities at a sewage treatment facility. This is proposed in Kai 2000-246289, JP-A 2000-288595, and the like. Japanese Patent No. 3131176 proposes an apparatus capable of reducing carbonization of organic waste. Japanese Patent Laid-Open No. 2000-246289 proposes a method of carbonization treatment by adding a carbon-containing carbonization aid to an object to be carbonized of sludge containing organic matter or organic waste. 288595 proposes a system that implements the carbonization method.
[0004]
In the above-mentioned JP-A-2000-246289 and JP-A-2000-288595, an apparatus in which a grid is simply provided at the lower part of the continuous carbonization section clogs the grid and hinders continuous processing. In order to allow the processing to be performed smoothly, an upper opening plate and a lower opening plate having a plurality of passage holes are provided in the continuous carbonization portion in order to allow the carbide to move downward. By moving the upper aperture plate, the carbide can be dropped when the upper and lower passage holes are coincident (same position when viewed in the vertical direction). In addition, a downward scraping plate is provided on the bottom surface of the upper opening plate.
[0005]
[Problems to be solved by the invention]
When the upper opening plate and the lower opening plate that move are provided in the continuous carbonization section, the carbonized object to be carbonized passes when the upper and lower passage holes are in the same position in the vertical direction, and the passage holes are different in the vertical direction. The position is closed, and in any case, almost no air is allowed to pass through, so that a reducing atmosphere can be maintained. The object to be carbonized is carbonized while moving downward appropriately. However, the object to be carbonized during carbonization usually becomes a high temperature of about 600 to 650 ° C., and the upper opening plate, the lower opening plate, and the wall surface around the continuous carbonization part are exposed to a high temperature. In some cases, deformation occurred. If the upper aperture plate and the lower aperture plate are warped or deformed by heat, the object to be carbonized is insufficiently dropped, becomes difficult to move, and cannot be continuously carbonized. In some cases, when a downward scraping plate was provided on the bottom surface of the upper opening plate, it was difficult to move. In view of this, for the purpose of smoothly performing continuous carbonization, the upper opening plate and the lower opening plate were studied, and a configuration capable of satisfactorily retaining the scraping function was studied.
[0006]
[Means for Solving the Problems]
As a result of examining the above problems, it is an apparatus for continuously carbonizing an object to be treated of sludge containing organic matter or organic waste, and a supply part for the object to be treated is provided on the continuous carbonization part in a reducing atmosphere, In the apparatus for continuously carbonizing while lowering the object to be processed by matching the through holes provided in each of the upper opening plate and the lower opening plate in which at least one of the continuous carbonization units provided below the supply unit moves, A continuous carbonization treatment apparatus for organic waste, characterized in that a cooling jacket is provided on the aperture plate or the lower aperture plate.
[0007]
In the present invention, a cooling jacket that protrudes leaving a through hole is provided below the upper opening plate, and the object to be processed is urged to drop by interference (contact) of the cooling jacket when the upper opening plate is moved . . In addition, a continuous carbonization treatment apparatus for organic waste provided with a cooling jacket around the continuous carbonization portion.
[0008]
In addition, a carbide feedback means is provided between the carbide outlet at the bottom of the continuous carbonization section of such a continuous carbonization treatment apparatus for organic waste and the supply section of the object to be processed, and the carbide is mixed with the object to be processed. I tried to do it. Similar to the above-mentioned JP-A-2000-246289 and JP-A-2000-288595, means for feeding back the carbide obtained by the above process as a means for supplying a carbon-containing auxiliary agent is provided with the object supply part and the lower part of the continuous carbonization part. The sewage treatment sludge is continuously treated by feeding back the carbide from the sewage treatment sludge to the continuous carbonization section.
[0009]
Furthermore, the carbonization processing apparatus which consists of the mixer which mixes a sewage-treatment sludge and a carbide | carbonized_material, the granulation part for making a sewage-treatment sludge easy to burn, and the closed continuous carbonization part which has a to-be-processed object supply part in the upper part. In the above, the continuous carbonization portion is a continuous carbonization processing apparatus for organic waste having the jacket described above.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a process flow diagram of an apparatus for continuous carbonization of organic waste according to the present invention. This apparatus has the to-be-processed object supply part 5 in the upper part of the continuous carbonization part 4, and adds a carbon containing adjuvant to sewage treatment sludge etc. in the upper right part of the continuous carbonization part 4 as needed, This continuous carbonization part 4 performs continuous carbonization. An outline of this apparatus is also introduced in the previously proposed Japanese Patent Laid-Open No. 2000-246289. A granulation unit 19 and a drying unit 20 are provided for facilitating combustion of sewage treatment sludge and the like for supply to the object supply unit 5. Although the detailed illustration is omitted, the granulating portion 19 is configured to cut the noodle-like sludge extruded from the porous nozzle into a granular shape. In the apparatus of this embodiment, almost the entire amount of carbide obtained in the continuous carbonization section 4 is fed back as means for supplying the carbon-containing auxiliary agent, and the feedback means 18 is sewage from the carbide outlet 6 of the continuous carbonization section. It is transported to a mixer 21 for mixing treated sludge and carbides. It is sent from the mixer 21 to the granulation unit 19 by a conveyor. Carbide from the sewage treatment sludge is fed back to the continuous carbonization section and used to continuously treat the sewage treatment sludge.
[0011]
FIG. 2 is a longitudinal sectional view of an embodiment of a continuous carbonization portion in the continuous carbonization processing apparatus for organic waste according to the present invention. In the continuous carbonization part in this apparatus, it has the cylindrical casing 2 on the machine base 1, and the continuous carbonization part 4 which has the inner cylinder 3A and the outer cylinder 3B is provided in the inside. The upper part is the processing object supply part 5. The lower part of the continuous carbonization part 4 is a tapered carbide outlet 6 having a narrow bottom. A suction duct 8 for the organic gas collection unit 7 is provided below the continuous carbonization unit 4. The suction duct 8 is connected to the exhaust fan 9. The carbide discharged from the carbide outlet 6 is fed back by a feedback means 18 (indicated by a one-dot chain line) such as a conveyor provided between the object supply parts 5 to be reused as a carbon-containing auxiliary agent. ing.
[0012]
3 and 4 are enlarged views of part A in FIG. In the continuous carbonization unit 4, the object to be treated is supplied from above, and is moved downward while carbonizing the reducing atmosphere in a state where there is almost no supply of air. For this purpose, an upper opening plate 11 and a lower opening plate 12 are provided in the continuous carbonization portion 4. Each has a structure having a plurality of through holes (opening grooves) through which an object to be treated during carbonization passes, and FIG. 5 shows a cross section of the lower opening plate 12. The upper opening plate 11 has substantially the same structure, but the lower opening plate 12 is fixed to the apparatus casing 2 side, whereas the upper opening plate 11 is movable in the horizontal direction. For this purpose, the upper opening plate 11 is suspended in the continuous carbonization part 4 by a suspension rod 13 and is connected to a cylinder 15 provided on the side surface of the apparatus casing 2. When the through holes 11a and 12a provided in the moving upper opening plate 11 and the fixed lower opening plate 12 exist at different vertical positions as shown in FIG. 3, the object to be processed cannot pass. If they match in the vertical direction as shown in FIG. 4, the object to be processed can be lowered.
[0013]
The object to be carbonized during carbonization usually has a high temperature of 600 to 650 ° C., and the upper opening plate 11 and the lower opening plate 12 are likely to be deformed. Further, the wall surface of the inner cylinder 3A around the continuous carbonization portion is also exposed to high temperature. If the upper opening plate 11 and the lower opening plate 12 are deformed such as warping due to heat, the object to be carbonized is insufficiently dropped, becomes difficult to move, and continuous carbonization becomes impossible. If a downward scraping plate is provided on the bottom surface of the upper opening plate 11, the movement may be difficult. Therefore, in the present invention, the upper opening plate 11 and the lower opening plate 12 are provided with cooling jackets 10A and 10B. The structure of the cooling jacket is shown in FIG. The refrigerant liquid moves in the direction of the refrigerant outlet while bypassing the refrigerant inlet 12b around the plurality of passage holes 12a of the object to be processed. As the refrigerant liquid, water is suitable because it is inexpensive and easy to supply.
[0014]
On the other hand, when the passage holes 11a and 12a are present at different positions as shown in FIG. 3, the upper opening plate 11 is placed on the lower opening plate 12 without dropping the object to be processed. The cooling jacket 10A is provided so as to protrude below the upper opening plate leaving a passage hole. Thus, every time the upper opening plate moves, the cooling jacket 10A interferes with the object to be processed so as to encourage the object to be processed to fall. When the upper opening plate 11 is periodically moved to the left and right by the cylinder 15 that constitutes the swing means 14 together with the suspension rod 13, the object to be processed or the carbide can be dropped downward.
[0015]
In the continuous carbonization treatment apparatus for organic waste according to the present invention, a cooling jacket 10C is also provided around the continuous carbonization section 4. Thereby, thermal deformation and thermal decomposition of the inner cylinder 3A can be prevented.
[0016]
The object to be treated of the organic waste is put in the continuous carbonization part 4 and is ignited by applying a burner flame in the continuous carbonization part 4 until the initial carbonization is stabilized. The reducing atmosphere is carbonized in a state where there is almost no supply of air, and the carbide is dropped downward while the upper opening plate 11 is periodically moved left and right by the swinging means 14. At this time, the exhaust fan 9 is turned to forcibly remove organic gas such as pyroligneous acid produced as a result of carbonization from the suction duct 8 and burn it in the combustion furnace 16. Organic gas such as wood vinegar may also be collected by a collection tube that is bent in a U shape and passes through the cooling water tank.
[0017]
【The invention's effect】
According to the present invention, the upper aperture plate is smoothly moved, so that the object to be treated of organic waste can be continuously carbonized without stagnation in the process of carbonization. Reduction is always performed in a stable state, and a homogeneous carbide is obtained. Since the upper opening plate, the lower opening plate, the inner cylinder, the casing, and the like are not exposed to high temperatures, the apparatus is hardly damaged and the durability is improved.
[Brief description of the drawings]
FIG. 1 is a process flow diagram of an organic waste continuous carbonization treatment apparatus of the present invention.
FIG. 2 is a longitudinal sectional view of a continuous carbonization portion in the organic waste continuous carbonization processing apparatus of the present invention.
FIG. 3 is an enlarged view of a portion A in FIG. 2 when the passage holes exist at different vertical positions.
FIG. 4 is a view corresponding to FIG. 3 when the passage holes are aligned in the vertical direction.
FIG. 5 is a cross-sectional view of a lower opening plate.
[Explanation of symbols]
1 Machine 2 Casing
3A inner cylinder
3B Outer cylinder 4 Continuous carbonization part 5 Processed object supply part 6 Carbide outlet 7 Organic gas collection part 8 Suction duct 9 Exhaust fan
10A cooling jacket
10B Cooling jacket
10C cooling jacket
11 Upper aperture plate
11a Through hole
12 Lower aperture plate
12a Through hole
13 Hanging rod
14 Swing means
15 cylinders
16 Combustion furnace
18 Feedback means
19 Granulation section
20 Drying section
21 Mixer

Claims (3)

An apparatus for continuously carbonizing an object to be treated of sludge or organic waste containing organic matter, wherein a supply part for the object to be treated is provided above the continuous carbonization part in a reducing atmosphere, and continuous carbonization below the supply part In the apparatus for continuously carbonizing while lowering the object to be processed by matching the through holes provided in each of the upper opening plate and the lower opening plate in which at least one of the moving parts is moved,
A cooling jacket is provided on the upper opening plate or the lower opening plate,
A cooling jacket that protrudes leaving a passage hole below the upper opening plate is provided,
An apparatus for continuously carbonizing organic waste, wherein the object to be treated is urged to fall by interference of a cooling jacket when the upper opening plate is moved . The continuous carbonization processing apparatus of the organic waste of Claim 1 which provided the jacket for cooling around the continuous carbonization part. Carbides Fi between outlet carbide continuous carbonization subordinates portion and the supply portion of the object to be processed - Dobakku a means, organic waste according to claim 1, wherein which is adapted to mix the object to be processed a carbon compound Equipment for continuous carbonization.

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