JP2001201031A - Method of preprocessing organic waste matter in vertical self combustion type of carbonizing furnace for organic waste matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of preprocessing organic waste matter in a vertical self combustion type of carbonizing furnace for enabling organic waste matter, which is small in calorific value and is hard of self burning, to burn by itself. SOLUTION: A method of manufacturing charcoal is performed by charging a vertical self combustion type of carbonizing furnace with organic waste matter and combusting its one part and carbonizing it with the heat of combustion. Pretreatment is performed so that the mixture may be at or over the calorific value of self combustion of the vertical self combustion type of carbonizing furnace, by mixing matter at or over the calorific value of self combustion into the organic waste matter, before putting the organic waste matter not more than the calorific value of self combustion into the vertical self combustion type of carbonizing furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pretreating organic waste in a vertical self-combustion type carbonizing furnace for carbonizing organic waste such as paper sludge, animal dung and the like to produce charcoal. .

[0002]

2. Description of the Related Art A carbonization furnace for producing charcoal by partially burning organic sludge such as paper sludge, sewage sludge, squeeze waste such as juice or tea, and livestock dung, and carbonizing it by the heat of combustion. Was proposed in Japanese Patent Application No. 11-147019.

FIG. 1 is a vertical sectional view of a vertical type self-combustion type carbonizing furnace.

[0004] The vertical self-burning carbonization furnace has a substantially cylindrical main body 1, an inlet 2 for charging organic waste to be treated, and an exhaust gas discharged from the carbonization furnace at the top of the main body 1. Exhaust pipe 3 is provided.

An air supply duct 6 is attached to the upper part of the side wall 4 of the main body 1 so as to surround the first air supply port 5 around the outside of the side wall 4, and the air supplied to the air supply duct 6 is supplied to the air supply duct 6. , Through a first air supply port 5.

An air supply duct 8 is attached to the lower part of the side wall 4 of the main body 1 around the outside of the side wall 4 so as to surround the second air supply port 7, and the air is supplied to the air supply duct 8. Air is supplied to the inside of the lower portion of the main body through the second air supply port 7.

[0007] The lowermost portion of the main body 1 is formed to have an inner diameter larger than the inner diameter of a portion other than the lowermost portion of the main body 1, and a bottom wall 9 is attached thereto.

[0008] An ignition burner 10 is arranged above the second air supply port 7 in the side wall 4 of the main body 1.

A cylindrical body 11 having an outer diameter smaller than the inner diameter of the main body 1 is disposed in a portion of the main body 1 facing the second air supply port 7, and is formed by the cylindrical body 11 and the side wall 4 of the main body 1. , And constitute a ring-shaped space 12. The cylindrical body 11 has a frusto-conical top wall 13 and a side wall 14 of the cylindrical body 11, and is rotated by a motor M. Note that a third air supply port may be provided in the upper part of the side wall 14 of the cylindrical body 11 to supply air to the upper part of the ring-shaped space 12.

A discharge table 15 having a truncated cone shape is disposed below the cylindrical body 11, and an upper part of the discharge table 15 is in contact with a lower part of the cylindrical body 11. Discharge table 1
The space 16 between 5 and the inner wall of the body 1 provides a passage for smelted, ie, carbonized, carbide to be discharged outside the furnace. The discharge table is also configured to be rotated by the motor M.

The discharge table 15 may be structured so that it can be moved up and down by a jack J. By adjusting the width of the space 16 by raising and lowering, it is possible to adjust the size of the discharged carbide.

Next, a method of operating the carbonization furnace having the above-described configuration will be described.

The organic waste is introduced into the main body 1 through the charging port 2, and the burner 10 is ignited to ignite the organic waste.
The fuel is burned by the air supplied from the air supply port 7. This combustion is a mixture of solid combustion and gasification combustion, and the combustible gases and the like that did not burn in this region are:
The combustion zone in the upper part of the body 1 is reached. Since air is supplied to the combustion zone from the first air supply port 5, the combustible components are completely burned, and generation of dioxin and the like can be prevented.

Next, the organic waste that has reached the upper portion of the ring-shaped space 12 is burned by the air supplied from the second air supply port 7, and the waste in the combustion state is reduced to the ring-shaped space. The lower part of 12 is reached. At this stage,
Since the waste is in a condensed state and is not supplied with air and is in an oxygen-deficient state, the waste is extinguished and steamed to become char.

Next, when the discharge table 15 is rotated, the carbide falls from the space 16 below the discharge table 15 and is scraped off by the scraper 17 to remove the carbide.
Emitted from 8. At this time, the discharge table 15
Is moved up and down by the jack J to adjust the width of the space 16 and the size of the discharged carbide.

[0016]

However, organic waste such as paper sludge having a high water content and a low content of combustible components has a small calorific value when dried in a dry state, and is therefore a vertical type self-combustion type carbonized material. Since self-combustion becomes difficult and disappears in the furnace, carbonization may not be possible. For example, even if a drying furnace such as a rotary kiln using the exhaust gas of a vertical self-combustion type carbonization furnace is installed to dry paper sludge and put into a carbonization furnace, there is a drawback that self-combustion and carbonization are not possible.

Accordingly, the present invention provides a method for pretreating organic waste in a vertical self-combustion type carbonization furnace for enabling self-combustion of organic waste having a small calorific value and difficult to self-combust.

[0018]

According to the present invention, there is provided a method for pretreating organic waste in a vertical self-combustion type carbonization furnace, comprising the steps of charging organic waste into a vertical self-combustion type carbonization furnace. In the method of producing charcoal by burning part of the waste and carbonizing it by the heat of combustion, the organic waste having a calorific value equal to or less than the self-combustion calorific value is converted into organic waste before being charged into the vertical type self-combustion type carbonizing furnace. It is characterized in that a substance having a self-heating calorific value or more is mixed so that the mixture has a self-heating calorific value of a vertical self-combustion type carbonizing furnace or more.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The amount of self-combustion heat generated by a vertical type self-combustion type carbonizing furnace varies from furnace to furnace.
00kcal / kg-wet, about 200 for large furnace
It is 0 kcal / kg · wet. For example, the water content of paper sludge is about 60% when it is generated, and when it is dried to 0%, the calorific value is 1900 kcal / kg. . The broiler dung has a water content of 30% (% by weight).
Hereinafter, "%" is% by weight. ) Indicates that the calorific value is 2300
It burns more than kcal / kg and burns itself. However, as the water content exceeds 30%, the calorific value decreases and the fuel does not self-burn.

Therefore, the organic waste that does not reach the self-heating calorific value of the vertical self-combustion type carbonizing furnace is mixed with a substance having a self-burning heat value or more, and the mixture is mixed with the self-combustion heating value of the vertical self-combustion type carbonizing furnace. To be.

In the present invention, the substance added to the organic waste having a self-heating calorific value or more is one of plastic waste, wood chips, bark, coke, coal, and charcoal generated in the vertical type self-combustion furnace. Alternatively, a mixture of two or more can be used.

[0022]

EXAMPLE 1 The water content of paper sludge is about 60%, and it does not self-combust even if it is directly charged into a vertical self-combustion type carbonizing furnace.
Dry to about 0%.

Therefore, a calorific value of about 9000 is added to 1000 kg of paper sludge dried to a water content of about 10%.
kcal / kg.Dry plastic waste is mixed with 10% by weight of paper sludge, and the calorific value of the mixture is reduced to 24.
00kcal / kg ・ wet and self-heating calorific value is 200
It was charged into a 0 kcal / kg · wet vertical self-burning carbonization furnace. As a result, it was possible to self-burn and 200 kg of charcoal could be produced.

[0024]

According to the present invention, an organic waste having a self-heating calorific value or less is mixed with an organic waste having a self-burning calorific value or less and the mixture is made to have a self-combustion calorific value of a vertical type self-combustion type carbonizing furnace. Charcoal can be produced by self-burning things.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a vertical self-combustion type carbonization furnace.

[Explanation of symbols]

1: body, 2: inlet, 3: exhaust pipe, 4: side wall, 5: first air supply port, 6: air supply duct, 7: second air supply port, 8: air supply duct, 9: Bottom wall, 10: ignition burner, 11: cylindrical body, 12: ring-shaped space, 13: truncated conical top wall, 14: side wall of cylindrical body, 15: discharge table, 16: space, 17: scraper, 18 :Vent,
M: Motor, J: Jack

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C10B 53/02 C10B 53/02 57/04 57/04 C10L 5/42 C10L 5/42 5/48 5 / 48 F23G 5/02 ZAB F23G 5/02 ZABD −59 Inside Nippon Steel Plant Design Co., Ltd. AC02 AC11 AC12 AC14 AC17 BA05 BA10 CA04 CA20 4D004 AA01 AA02 AA04 AA12 BA03 CA26 CB34 CC15 CC17 4H012 HA06 HB07 JA04 JA09 4H015 AA01 AA02 AA08 AA10 AA12 AA13 AA14 AA17 AB01 BA01 B B01 CB01

Claims (1)

[Claims] 1. A method for manufacturing a charcoal by charging an organic waste into a vertical type self-combustion type carbonization furnace, burning a part of the waste, and carbonizing by the combustion heat. Before charging the material into the vertical self-burning carbonization furnace, mix the organic waste with a substance that has a self-heating calorific value or more so that the mixture has the self-burning heat value of the vertical self-burning carbonization furnace. A method for pretreating organic waste in a vertical self-burning carbonization furnace for organic waste.