JP3199696B2 - Waste continuous carbonization method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuous carbonization of waste mainly containing organic matter such as activated sludge, buckwheat husk, and coffee extract residue generated in sewage treatment facilities such as human waste treatment sludge, food manufacturing industry and livestock waste. it is those related to.

[0002]

2. Description of the Related Art The scale of human waste treatment facilities and various kinds of sewage treatment facilities has been increasing, and the amount of generated sludge has increased accordingly. In order to solidify into useful building materials, etc., there is a problem that strength is not obtained due to mainly organic substances and there is a problem of smell. Attempts have been made to use fertilizer (Japanese Patent Application No. 9-280460), but the amount of fertilizer produced is large, resulting in overproduction.

[0003]

The sludge, buckwheat husk, coffee grounds, and the like generated in human waste treatment facilities and various sewage treatment facilities can be effectively used. It is one of the options as a means.
However, at the time of incineration, measures against the generation of dioxin are required, and a heating source is also required. Therefore, the present inventor studied a waste continuous carbonization method capable of recovering generated gas without using a conventional combustion method and capable of continuously operating without particularly heating, and a device used therefor. . In particular, it has been studied to eliminate clogging caused by wood vinegar or the like on the raw material supply side due to the carbonization method in a reducing atmosphere.

[0004]

As a result of studying the above problems, the present invention relates to a method of carbonizing a sludge containing organic matter or an organic waste by adding a carbon-containing carbonization assistant to the object to be carbonized. The carbide obtained by the carbonization process is fed back as a carbonization aid, mixed with sludge or organic waste containing organic matter, and the upper and lower aperture plates provided in the carbonization part, the upper and lower passage holes and the upper aperture plate. A continuous carbonization method characterized in that carbonization is performed while promoting falling by a scraping plate provided on the bottom surface of the waste.

[0005] The apparatus for carrying out the continuous carbonization method includes:
A carbonization treatment apparatus having a continuous carbonization section and having an object supply section to be carbonized at an upper portion of the continuous carbonization section and a carbide outlet at a lower portion, wherein an organic gas collecting section is provided at the continuous carbonization section. A continuous carbonization treatment device for waste, comprising a feedback means provided between the carbide outlet and the supply section of the carbonized material to be treated. The organic gas collection unit referred to here may be guided to a combustion device that burns the collected organic gas, or may be a case where the collected organic gas is cooled to collect wood vinegar and other organic gases.

The lower portion of the continuous carbonized portion is composed of an upper opening plate having a plurality of passage holes and a lower opening plate, and a swing means is provided on at least one of the upper opening plate and the lower opening plate.

[0007]

FIG. 1 is a sectional view of a continuous waste carbonization apparatus capable of carrying out the continuous waste carbonization method of the present invention, and FIG. 2 is an enlarged view of a portion A in FIG. This continuous waste carbonization apparatus has a cylindrical casing 2 on a machine base 1 and a continuous carbonization section 4 having an inner cylinder 3. The lower portion of the carbonized portion 4 is a tapered carbide outlet 6 having a narrow lower portion.
A suction duct 8 of an organic gas collecting unit 7 is provided below the continuous carbonizing unit 4.
Is provided. The suction duct 8 is connected to the exhaust fan 9, but is bent in a U-shape in the middle to form a cooling water tank 10.
Passing through. Organic gas such as wood vinegar generated as a result of carbonization is forcibly sucked by the exhaust fan 9 and collected by the cooling water tank 10. Carbide discharged from carbide outlet 6
(Activated carbon) is designed to be reused as a carbonization aid by feedback means (shown by a dashed line) of a conveyor (not shown) so that the (activated carbon) is fed back between the carbonization target supply units 5. .

[0008] Normally, when carbonized in a reducing atmosphere to obtain a carbide, wood vinegar and other organic gases are generated. When the organic gas collecting unit 7 is provided below the carbonization unit 4 and suction is performed as in the apparatus of the present invention, in a device in which a lattice is simply provided below the carbonization unit 4, the lattice is clogged, and continuous carbonization is hindered. . Therefore, in the waste continuous carbonization apparatus according to the present invention, details are shown in FIG. 2, but below the continuous carbonization section 4, a plurality of passage holes 11a, 12a
An upper opening plate 11 and a lower opening plate 12 having The upper and lower passage holes 11a and 12a are located at the same position in the vertical direction depending on the position where the upper opening plate 11 and the lower opening plate 12 are present, so that the carbide 4 can drop. A downward scraping plate 11b is provided on the bottom surface of the upper opening plate 11 in order to promote the falling. A cylinder 15 provided on the machine base 1 side as a swinging means 14 is connected to the upper opening plate 11, and is swingably suspended from the inner wall of the inner cylinder 3 by a suspension band 13.

Next, an example of continuous carbonization of sludge using the waste continuous carbonization apparatus will be described. As shown in Table 1, carbonization treatment was performed by adding a feed back of 1,440 g of the carbide obtained in the previous step as a carbonization aid to 4,880 g of sludge generated by the microbial activation treatment of the food processing facility. The average water content of the mixture thereof was 70.6%, and the organic mass in the input amount of 6,320 g was 1,855 g. The mixture was thoroughly mixed and stirred, granulated using a granulator, and then dried. This was put in the carbonized part 4 and a burner flame was caused to act on the carbonized part 4 until the initial carbonization was stabilized. Carbonization of the reducing atmosphere was performed in a state where there was almost no supply of air, and the carbide was dropped downward by periodically moving the upper opening plate 11 left and right by the rocking means 14. At this time, the exhaust fan 9 was turned to forcibly suck and remove the organic gas such as wood vinegar generated as a result of carbonization from the suction duct 8.

[0010]

[Table 1]

FIG. 3 shows a carbonization process diagram of the present invention. As a result of carbonization in this reducing atmosphere, 948 g of carbide was obtained from the sludge + carbonization of the input amount of 6,320 g, and 907 g of wood vinegar and the like were volatilized. By using a total of 948 g of the obtained carbide as feedback, continuous carbonization was possible. Also, considering the balance, we will commercialize some of them as carbides. Table 2 shows the analysis results of an example of the obtained carbide. Some adsorption capacity is observed in the adsorption test. It is considered that the activation treatment further enhances the adsorption ability.

[0012]

[Table 2]

As shown in FIG. 4, an organic gas such as wood vinegar or the like produced as a result of carbonization can be forcibly sucked from the suction duct 8 by the exhaust fan 17 and burned and disposed in the combustion furnace 16.

[0014]

Industrial Applicability According to the present invention, sludge, buckwheat husks, coffee grounds, and the like generated in human waste treatment facilities and various sewage treatment facilities, which are generated in large quantities and are difficult to dispose of, can be carbonized by continuous operation. . This continuous carbonization equipment for waste has enabled stable operation without any trouble occurring at that time.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a continuous waste carbonization apparatus capable of performing a waste continuous carbonization method of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a carbonization process diagram.

FIG. 4 is a longitudinal sectional view of a continuous waste carbonization apparatus capable of performing the waste continuous carbonization method of the present invention.

[Description of Signs] 1 Machine stand 2 Casing 3 Inner cylinder 4 Continuous carbonization section 5 Supplying target material to be carbonized 6 Carbide outlet 7 Organic gas collecting section 8 Suction duct 9 Exhaust fan 10 Cooling water tank 11 Upper opening plate 11a Hole 12 Lower opening plate 12a Passage hole 13 Suspension band 14 Swing means 15 Cylinder 16 Combustion furnace 17 Exhaust fan

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁷ identification code FI B09B 3/00 302 B09B 3/00 302E (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 11/00-11 / 20 B09B 1/00-5/00 C05F 1/00-17/00 F23G 5/00-7/02 F23J 1/00-11/12

Claims (1)

(57) [Claims] 1. A method of carbonizing a sludge containing organic matter or an organic waste by adding a carbon-containing carbonization aid to a carbonization target, wherein the carbonization-aid is obtained by the carbonization treatment. The carbide is fed back and mixed with sludge or organic waste containing organic matter, and the upper and lower openings of the upper and lower openings provided in the carbonization section and the bottom of the upper opening
A continuous carbonization method for wastes, characterized in that carbonization is performed while promoting falling by a scraping plate provided on a surface .