JP2003268378A - Apparatus for continuously carbonizing waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for continuously carbonizing sludge for excremente treatment, sludge for sewage treatment of food manufacturing and stock farming industries a pulp lees, so as to be capable of working smoothly even when less watchmen are arranged. <P>SOLUTION: The apparatus for continuously carbonizing wastes comprises setting up supplying part 2 of a subject for carbonized treatment on an upper part of a carbonizing furnace 1, a taking out exit 3 of a carbonized material at a lower part and a carbonizing part 4 between them; being reductively carbonized on the way of the carbonizing part while supplying a matter 5 to be carbonized; in the apparatus for carbonizing wastes to obtain the carbonized material 6 from the lower taking out exit, setting up a gas blowing inlet 7 and a gas suction exit 8 on the top in the subject for the carbonized treatment of the carbonizing part 4; on the outside of the carbonizing furnace, forming a gas circulating line C between the gas suction exit 8 and the gas blowing inlet 7; setting up a combustible hot wind generating furnace 10 on the way of the gas circulating line; and supplying a heated gas from the gas blowing inlet 7 into the subject for carbonized treatment while performing deoxygenation and heating in the combustible hot wind generating furnace 10 by combustion of a combustible component in the gas circulating line generated in the carbonizing furnace. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly treats wastes rich in organic matter, that is, waste treatment sludge, wastewater treatment sludge of food manufacturing industry, livestock industry, etc., buckwheat husks, pulp dregs in the paper manufacturing industry, etc. It relates to a continuous carbonization device that can

[0002]

2. Description of the Related Art An example of solid cellulose waste is introduced in Japanese Patent Laid-Open No. 97161/1975 as an attempt to carbonize organic matter-rich waste and recycle it to form a carbonization aid. In addition,
An example of an excess sludge incinerator can be seen in 53-70747. The present inventor has also previously proposed, in Japanese Patent No. 3199696, a method for continuous carbonization treatment of waste such as sludge containing organic matter generated in human waste treatment facilities and various sewage treatment facilities. The carbonization method is a method in which a carbon-containing carbonization aid is added to an object to be carbonized and carbonization is performed, and the sludge containing an organic substance is fed back as the carbon-containing carbonization aid by feeding the carbide obtained by the carbonization treatment. Alternatively, it is mixed with organic waste, and is continuously carbonized while accelerating the fall by upper and lower passage holes of the upper opening plate and the lower opening plate provided in the carbonization part and a scraping plate provided on the bottom surface of the upper opening plate. It is what

An apparatus for carrying out such a continuous carbonization treatment method supplies an object to be carbonized by providing an upper part for supplying an object to be carbonized, a lower part for discharging a carbide, and a carbonizing part between them. While reducing carbonization in the middle of the carbonization part in the furnace,
The structure is such that carbide is obtained from the lower outlet and fed back. A step of reducing carbonization in the middle of the carbonization part is important for smooth continuous carbonization, and it is provided on the bottom surface of the upper opening plate so that the object to be carbonized and the carbonization can be moved downwards without hindrance. The scraping plate is used to encourage the fall. Further, consideration is given to enabling carbonization at high temperature while maintaining a reduced state in which oxygen is hardly supplied.

[0004]

However, in the apparatus for carrying out the continuous carbonization treatment method, it is often difficult for the carbides to move downward due to the water generated when the object to be carbonized is decomposed, and the carbides stay there. is there. Therefore, it requires manpower for monitoring. In addition, when the lower part of the carbonized portion is sucked and the decomposed gas is sucked and removed, the temperature is lowered, and it is difficult to maintain the temperature for smooth continuous carbonization. It is desired to smoothly carry out these without arranging an observer.

Further, in the apparatus for carrying out the continuous carbonization method, among the objects to be carbonized, extremely viscous human waste sludge, sewage sludge from the food manufacturing industry or the livestock industry, and papermaking are used. Often requires a difficult post-mix carbonization process, such as when mixing with pulp meal in the industry.
As described above, there are cases in which the mixing is not successful, or the continuous carbonization process has to be stopped by stopping the supply part of the object to be carbonized due to the entanglement of the string-like object.

[0006] Therefore, the inventor of the present invention operates smoothly in a continuous carbonization treatment apparatus such as human waste treatment sludge, sewage treatment sludge of food manufacturing industry or livestock industry, pulp dregs, etc. even if the number of supervisors is reduced as much as possible. I examined it so that I could do it.

[0007]

As a result of studying the above-mentioned problems, as a result of providing the object to be carbonized, a part for supplying the object to be carbonized is provided above the carbonization furnace, a carbide outlet is provided below, and a part to be carbonized is provided therebetween. However, in a waste carbonization device that obtains carbides from the lower outlet through reduction carbonization in the middle of the carbonization part, a gas injection port is provided in the upper part of the object to be carbonized in the carbonization part, and a gas suction port is provided in the lower part. A gas circulation line between the gas suction port and the gas injection port was formed outside the furnace, and a combustion hot air generating furnace was provided in the middle of the gas circulation line.

A device capable of supplying heated gas from the gas inlet to the object to be carbonized while deoxidizing and heating by burning the combustible gas component (mainly the gas generated in the carbonizing furnace) in the circulation line. It was. A low-oxygen gas is blown into the object to be carbonized that moves downward in the carbonization furnace of the waste continuous carbonization equipment, and the object to be carbonized is thermally decomposed and carbonized in the reduced state. It

A carbide feedback line was formed between the carbide outlet and the feed section of the waste continuous carbonizer. As a matter of course, the carbide feedback line is provided outside the carbonization furnace, and almost all the amount of carbide extracted from the carbide outlet is fed back to the object-to-be-carburized supply part. It can be provided and shipped as a carbide product.

Further, a supply line for the object to be carbonized was formed in the supply section, and a heating crushing mixer for organic waste, a carbide kneader, and a dryer were arranged on the supply line. If necessary, charcoal such as charcoal and bamboo charcoal can be supplied to the carbide kneader including the carbide from the feedback line and kneaded with the object to be carbonized.

The above-mentioned thermal crushing mixer has a structure in which a crushing claw is provided in a horizontal casing, and has a supply port of an object to be carbonized on the upstream side and a discharge port on the downstream side. The crushing claw does not simply have a structure in which a ribbon-shaped spiral blade is provided on the rotary shaft, but instead of the spiral blade, a large number of crushing claws are arranged spirally with respect to the rotary shaft from the upstream side to the downstream side. Has been done.
As a result, a viscous object to be carbonized can be agitated, and a plurality of kinds of object to be carbonized having different properties can be mixed while being crushed and sent to the downstream side.

[0012]

1 is a flow chart showing an outline of a waste continuous carbonization apparatus of the present invention, FIG. 2 is a detailed view of a carbonization furnace and a gas circulation line, FIG. 3 is a sectional view of the carbonization furnace, and FIG. 4 is shown in FIG.
It is an intermediate DD sectional view. The continuous waste carbonization apparatus of the present invention has a carbonization furnace 1 as shown in the flow chart of FIG.
Is mainly constituted by a supply line A for the object to be carbonized, a carbide feedback line B, and a gas circulation line C.

The carbonization furnace 1 is provided with a supply section 2 for the object to be carbonized above the furnace body having a heat insulating structure, a carbide outlet 3 below, and a carbonization section 4 therebetween. While the object 5 to be carbonized is supplied from the upper supply part 2 through the A line, it is reduced and carbonized in the middle of the carbonization part 4, and the carbide 6 is obtained from the lower outlet. In the present invention, as shown in detail with reference to FIGS. 3 and 4, the gas injection port 7 is located at the upper position and the gas suction port 8 is located at the lower position located in the deposition layer of the object 5 to be carbonized of the carbonization portion 4 in the furnace. And are provided. Both of them have a downward opening structure that reaches from one side to the other side in the furnace, so that the hot air gas is distributed evenly into the object 5 to be carbonized from above, and the internal gas that is moist on the bottom side is averaged. I try to pull it out. At the bottom of the carbonization part 4 in the furnace, Patent No. 3199
A means for dropping the carbide while preventing the invasion of the air, which is composed of the upper opening plate 15 and the lower opening plate 16 which can be swung by the cylinder 17 introduced in No. 696, is provided.

On the other hand, outside the carbonization furnace, as apparent from FIGS. 1 and 2, a gas circulation line C is formed between the gas suction port 8 and the gas blowing port 7. The gas circulation line C forms a gas circulation system with a duct having a heat insulating structure and pipes with sufficient ventilation. The gas is circulated by a fan 9 provided in the gas circulation line.

Further, a combustion hot air generating furnace 10 is provided in the middle of the gas circulation line C. As shown in detail in FIGS. 1 and 2, the combustion hot air generating furnace 10 has a gas inlet 12 communicating with the gas suction port 8 of the carbonization furnace 1 in an adiabatic airtight casing 11, and a combustible gas component in the inflowing gas. A burner 13 for performing combustion and heating, and a hot air gas outlet 14 for sending deoxidized hot air to the gas inlet 7 of the carbonization furnace 1 through the fan 9 are provided. The hot air from the combustion hot air generating furnace 10 can also be supplied to a portion of the supply line A of the object to be carbonized that needs to be heated or kept warm.

A gas containing a small amount of oxygen is blown from the gas blowing port 7 to thermally decompose and carbonize the object to be carbonized in a reducing state, but the water generated when the object to be carbonized is decomposed is fed. The carbide 6 removed by
Moves smoothly inside the carbonization furnace 1 to remove the carbide 3
Taken from. A carbide feedback line B is provided between the carbide outlet 3 and the object-to-be-carburized supply unit 2.
Is formed. The carbide feedback line B is constituted by conveyors such as a bucket conveyor 18a and a screw conveyor 18b provided outside the carbonization furnace, and almost all the amount of the carbide extracted from the carbide outlet 3 is supplied to the object-to-be-carburized supply unit 2. Although feedback is provided, shipment as a carbide product is also possible. Further, the carbide feedback line B is a bucket conveyor 18a for adding the carbide 6 to the object to be carbonized as a carbonization aid in the preceding step of the supply line A of the object to be carbonized, which will be described later.
The line can be extended by the screw conveyor 18b or the like.

A supply line A for the object to be carbonized is connected to the supply unit 2, and a heating crushing mixer 19 for organic waste, carbide kneaders 20a, 20b, and a dryer 21 are connected to the supply line A.
Was placed. Carbide kneader 20 having hopper 23 at the top
If necessary, charcoal such as charcoal and bamboo charcoal including charcoal from the feedback line can be supplied to a and kneaded with the object to be carbonized. The internal structure of the carbide kneader 20 is a type in which double screws that rotate in opposite directions are arranged in a horizontal casing, and other known structures may be adopted. The object to be carbonized is dried by the dryer 21 by applying hot air from the combustion hot air generating furnace 10 to a plurality of parallel rotary perforated bands provided in the dryer casing. A granulator 22 for granulating an object to be carbonized is provided between the carbide kneaders 20a and 20b and the dryer 21 in order to increase the drying efficiency. The carbide kneader 20b is used when granulating without adding a carbide or the like.

The heating and crushing mixer 19 has a function of heating and crushing the object to be carbonized before being transferred to the hopper 23. As shown in an enlarged view of a main part in FIG. 1, a motor-driven rotating shaft 32 is provided in a horizontal casing 31, and a large number of arc-shaped crushing claws 33 are provided on the upstream side of the rotating shaft 32. To the downstream side in a spiral shape. A supply port 34 for the object to be carbonized is provided on the upstream side of the horizontal casing, and a discharge port 35 is provided on the downstream side. A preferable example of the structure of the arc-shaped crushing claw is a structure of a cultivator claw suitable for cultivating a field. Claws for crushing multiple types of carbonized objects with different properties 33
Is crushed and mixed, and sent to the downstream side. The object to be carbonized is sent to the supply port 34 from a plurality of feeders 24 via a conveyor. As the object to be carbonized,
Human waste sludge, sewage sludge from food manufacturing industry, livestock industry, etc.,
Organic rich wastes such as pulp dregs are carbonized. Even if a string-like material made of a thermoplastic resin is mixed in these, the horizontal casing and the like are heated and melted by the action of the hot air from the combustion hot air generating furnace 10, so they can be crushed, mixed and sent to the subsequent step. it can.

[0019]

According to the waste continuous carbonization apparatus of the present invention, the gas inlet and the gas inlet are provided in the object to be carbonized in the carbonization furnace, and the gas inlet and the gas inlet are provided outside the carbonization furnace. Since the gas circulation line between the mouths was formed and the combustion hot air generating furnace was installed in the middle of the gas circulation line, the combustion hot air generating furnace deoxygenates and heats by burning the combustible gas components in the circulation line while injecting the gas. A heated gas can be supplied from the mouth to the object to be carbonized. While keeping the object to be carbonized in the carbonization furnace at a high temperature and in a good reducing state, it is possible to prevent the carbide from staying in the furnace due to water removal.

Therefore, it has become possible to smoothly and continuously operate the human waste treatment sludge, the wastewater treatment sludge of the food manufacturing industry, the livestock industry, etc., and the continuous carbonization treatment equipment for the pulp cake in the paper manufacturing industry, even if the number of supervisors is reduced. .

A heating and crushing mixer having a structure in which a plurality of crushing claws are spirally provided on a rotating shaft in a casing makes it possible to crush and crush these viscous objects to be carbonized, and Even if substances are mixed, it is stirred and crushed and sent to the carbonization furnace. Thereby, the operating rate can be further increased.

[Brief description of drawings]

FIG. 1 is a flow chart showing an outline of a waste continuous carbonization apparatus of the present invention.

FIG. 2 is a detailed view of a carbonization furnace and a gas circulation line.

FIG. 3 is a sectional view of a carbonization furnace.

FIG. 4 is a sectional view taken along the line DD in FIG.

[Explanation of symbols]

1 carbonization furnace 2 Supply section of the object to be carbonized 3 Carbide outlet 4 Carbonization part in the furnace 5 Object to be carbonized 6 Carbide 7 gas inlet 8 gas suction port 9 Juan 10 Combustion hot air generator 11 Insulated airtight casing 12 Gas inlet 13 burners 14 Hot air gas outlet 15 Upper opening plate 16 Lower opening plate 17 cylinders 19 Heat crushing mixer 20a carbide kneader 20b carbide kneader 21 dryer 22 granulator 23 hopper 24 feeder 31 Horizontal casing 32 rotation axis 33 Crushing claw 34 Supply port 35 outlet A Supply line for carbonization target B carbide feedback line C gas circulation line

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10B 53/02 F23G 5/027 Z F23G 5/027 5/16 B 5/16 B09B 3/00 ZAB F term (Reference) 3K061 AA16 AB02 AC11 AC12 AC17 FA03 FA10 FA14 FA21 3K078 BA08 CA02 CA07 4D004 AA02 AA04 CA04 CA14 CA26 CB36 CB42 CB43 CB44 4D059 AA01 AA03 AA07 BB03 BK11 CB01 4H012 HA06 JA04 JA09 JA11

Claims (4)

[Claims] 1. A supply part for the object to be carbonized is provided above the carbonization furnace, a carbide outlet is provided below the carbonization part, and a carbonized part is provided between them to reduce carbonization in the middle of the carbonized part while supplying the object to be carbonized. In a waste carbonization apparatus for obtaining a carbide from an outlet of a carbonization part, a gas inlet and a gas inlet are provided at an upper part and a lower part of the object to be carbonized in the carbonization part, and the gas suction port and the gas inlet are provided outside the carbonization furnace. Forming a gas circulation line between them, a combustion hot air generating furnace is provided in the middle of the gas circulation line, and deoxidizing and heating by combustion of a combustible gas component in the circulation line of the gas generated in the carbonization furnace is performed by the combustion hot air generating furnace. A continuous carbonization apparatus for waste, characterized in that heating gas is supplied from the gas inlet to the object to be carbonized while being carried out in the inside. 2. A carbide feedback line is formed between the carbide outlet and the supply portion of the object to be carbonized.
Continuous waste carbonization device described. 3. The method according to claim 1, wherein a supply line for the object to be carbonized is formed in the supply section, and a heat crushing mixer for organic waste, a carbide kneader, and a dryer are arranged on the supply line. Continuous carbonization equipment for waste. 4. A thermal crushing mixer is provided with a supply port for an object to be carbonized on the upstream side of a horizontal casing and a discharge port on the downstream side, and a plurality of crushing claws are spirally provided on a rotary shaft in the casing. The continuous waste carbonization device according to claim 3.