JPH1066951A - Method for carbonizing organic waste and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently carbonize org. waste in a short time by preheating, fermenting or drying the org. waste and then heating the waste with radiant heat to carbonize it. SOLUTION: Such org. waste as garbage charged into a hopper 5 is introduced into the inlet 3 of a preheating rotary cylinder 1 by a screw conveyor 4 and moved therein toward an outlet 6 as the cylinder 1 rotates. At this time, a gas discharged from a carbonization rotary cylinder 10 is introduced to internally heat the waste and to externally heat the rotary cylinder 1, and the waste is fermented or dried. The solid discharged from the outlet 6 is stored in a hopper 8, introduced into the rotary cylinder 10 from an inlet 11 by a screw conveyor 9 and moved toward the outlet 12 of the cylinder 10, hence the solid is heated by the heat radiated from a heating tube 12 and carbonized, and the carbonized material is collected in a hopper 14 and discharged from an outlet 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for carbonizing organic waste, such as garbage, paper, plastics, etc., for effective use as fertilizer.

[0002]

2. Description of the Related Art
In order to carbonize organic waste, a method was adopted in which organic waste was directly charged into a rotary kiln that heats the rotary cylinder from the outside. Since it is unavoidable that a gap is generated in the seal portion provided at both ends of the rotary cylinder, when the inside of the rotary cylinder becomes a negative pressure, the atmosphere is drawn in and when the ratio of this air and the gas generated inside enters the flammable range. There is a risk of explosion in the furnace, and if the inside becomes high pressure, flammable gas will blow out from the seal and there is a danger of fire or explosion.
It is necessary to keep fire away from the seals at both ends, and the central part of the rotary cylinder is heated, and the rotary cylinder becomes locally heated and distorted. The body's life was shortened.

[0003]

Means for Solving the Problems, Functions and Effects As a means for solving the above problems, the invention of claim 1 is characterized in that organic waste is preheated and fermented or dried, and then heated by radiant heat to carbonize. Thus, carbonization can be sufficiently performed in a short time, and in the invention of claim 2, the organic waste is preliminarily mixed with fermentation bacteria in the invention of claim 1, so that garbage in the organic waste is fermented by preheating. Carbonization is promoted, and the invention of claim 3 is a preheating rotary cylinder for preheating and fermenting or drying the organic waste while discharging the organic waste supplied from one end from the other end, and a burner. A heating tube that emits radiant heat by the combustion flame, passes through the inside, receives a discharge from the preheating rotary cylinder from one end, and carbonizes the discharge while discharging from the other end. Since the inside of the cylinder is heated by the heating tube passed through the inside of the rotating cylinder, the inside of the cylinder can be uniformly heated, and the cylinder is hardly distorted. It is possible to minimize the leakage of the internal gas and the intrusion of the atmosphere by making it smaller, and the invention of claim 4 is the invention of claim 3, wherein the gas generated from the preheating rotary cylinder is burned in a deodorizing furnace. Since the preheating rotary cylinder is heated from the outer peripheral surface by the combustion gas, the heat efficiency is high and the discharged gas can be made pollution-free without foul odor and dust. In the invention according to claim 3 or 4, the gas generated in the rotating cylinder for carbonization is introduced into the rotating cylinder for preheating, so that the fermentation or drying of the organic waste is promoted and the thermal efficiency is improved. The invention of Claim 6 is Claims 3 and 4. In the invention according to the fifth aspect, the boiler is heated by utilizing the waste heat of the heating tube, and the steam generated from the boiler is driven into the rotating cylinder for carbonization. The efficiency of heat transfer with the gas is improved, and further, the water gas reaction (C + H ₂ O → CO + H ₂ )
Is liberated by gasification, and weight loss is further promoted.
According to the invention of claim 6, in the invention of claim 6, the combustible gas is inactive from the seal portion even if the rotatable carbonization cylinder becomes high pressure due to erroneous operation, since steam is injected from the seal portion of the rotatable cylinder for carbonization. The risk of fire and explosion is reduced due to leakage by mixing with water vapor.
In the invention of the above, the gas generated from the preheating rotary cylinder is driven into the carbonizing rotary cylinder, and is burned in a deodorizing furnace together with the gas generated from the carbonizing rotary cylinder, and the combustion gas is used to cause the preheating rotary cylinder from the outer peripheral surface. In the case of organic waste having a large amount of water due to heating, a large amount of water vapor is contained in the gas generated from the preheating rotary cylinder, which is sufficient without using a boiler as in the invention of claim 6. The amount of water vapor can be supplied into the rotating cylinder for carbonization, and has the same effect as that of the invention of claim 6 with a simple structure. Since the generated gas is injected from the seal portion of the rotary cylinder for carbonization, the same effect as in claim 7 is obtained, and the invention of claim 10 utilizes the waste heat of the heating pipe in the invention of claim 8 or 9. Remove the preheating rotary cylinder The effect of improving the thermal efficiency it is so arranged to heat the surface and the inside.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a preheating rotary cylinder which is rotated by a drive source (not shown) together with a concentric outer cylinder 2, and a discharge port of a screw conveyor 4 faces an input port 3. Is provided with a hopper 5.

The discharge port 6 of the preheating rotary cylinder 1 faces the input port 32 of the drop cylinder 7, and the lower end of the drop cylinder 7 is connected to the hopper 8 of the screw conveyor 9.

Reference numeral 10 denotes a carbonizing rotary cylinder that is rotated by a drive source (not shown). The discharge port of the screw conveyor 9 faces the input port 11 and the discharge port 12 is
3 faces the hopper 14 at the lower end.
Reference numeral 4 denotes a carbide discharge device 15 and a reflux cylinder 1
The upper end of 3 faces the inlet 3 of the preheating rotary cylinder 1.

[0008] Four heating tubes 16 are inserted through the recirculation tube 13 through the carbonizing rotary cylinder 10, and a burner 17 is attached to one end of each heating tube 16 so that a flame is blown into the cylinder. The other end of each heating tube 16 is connected to a boiler 18 having a water tube 19.

The discharge port 6 of the preheating rotary cylinder 1 is connected to a communication pipe 20.
Is connected to a deodorizing furnace 21 provided with a burner 22. An ejector 26 including a combustion air supply pipe 24 and a throttle port 25 and a damper 23 are interposed in the communication pipe 20.

A terminal of the deodorizing furnace 21 is connected to an inlet side of a gap 27 between the preheating rotary cylinder 1 and the outer cylinder 2 together with a terminal of the boiler 18, and an outlet side of the gap 27 is connected to an exhaust air supply pipe 28. It is connected to the chimney 29 facing.

The steam tank 30 of the boiler 18 is communicated with the inside of the rotary cylinder 10 for carbonization through the seal portions 31 at both ends of the rotary cylinder 10 for carbonization.

The operation of the embodiment will be described.

Organic waste such as garbage put into the hopper 5 is fed into the inlet 3 of the preheating rotary cylinder 1 by the screw conveyor 4 and discharged therewith as the preheating rotary cylinder 1 rotates. While moving to the outlet 6 side, the exhaust gas from the carbonizing rotary cylinder 10 described later
And the organic waste is heated from the inside, and the exhaust gas of the deodorizing furnace 21 described later is supplied to the preheating rotary cylinder 1.
The organic waste is externally heated and preheated by passing through the gap 27 between the outer casing 2 and the outer casing 2, and the volume and the weight are reduced by several times by fermentation or drying.

In order to promote the fermentation, fermentation bacteria may be mixed in the organic waste put into the hopper 5.

The gas discharged from the discharge port 6 of the preheating rotary cylinder 1 is guided into the deodorizing furnace 21 through the communication pipe 20 by the ejector 26 together with the pressurized air ejected from the combustion air supply pipe 24. The odor and dust are incinerated by the flame of the burner 22, and the organic waste in the preheating rotary cylinder 1 is heated through the gap 27 with the outer cylinder as described above, and is discharged from the exhaust air supply pipe 28. The air is discharged from the chimney 29 into the atmosphere by the ejector action of the compressed air. The damper 23 adjusts the amount of gas suction in the preheating rotary cylinder 1.

The solid matter discharged from the discharge port 6 of the preheating rotary cylinder 1 is stored in a hopper 8 through a falling cylinder 7.
It is thrown into the rotary cylinder 10 for carbonization from the input port 11 by the screw conveyor 9, and is heated by the radiant heat of the heating pipe 16 and carbonized while moving to the discharge port 12 side of the rotary cylinder 10 for carbonization. A fraction of the volume and weight are collected in the hopper 14 and discharged by the carbide discharge device 15.

The gas generated in the rotating cylinder 10 for carbonization enters the preheating rotary cylinder 1 from the outlet 12 through the recirculation cylinder 13 as described above, and heats the organic waste therein.

The waste heat of the heating tube 16 enters the boiler 18 and heats the water tube 19, and together with the waste heat of the deodorizing furnace 21, enters the gap 27 between the outer cylinder 2 and the preheating rotary cylinder 1, as described above. The rotary cylinder 1 is heated.

The water in the water pipe 19 of the boiler 18 becomes steam and is stored in the tank 30 and is driven into the rotatable carbonizing cylinder 10 from the seal portion thereof. The reduction in weight is promoted, and even if gas leaks from the seal part, the risk of ignition is eliminated because inert steam is mixed.

Next, another embodiment of the present invention will be described with reference to FIG.

The present embodiment is suitable for treating organic waste such as garbage containing a large amount of water, and the gas containing a large amount of water vapor discharged from the preheating rotary cylinder 1 is blower 35. Is sucked by a suction pipe 36 provided with a damper 39 therebetween, and supplied from the discharge pipe 37 through the seal portions 31 at both ends into the carbonizing rotary cylinder 10 to be carbonized.
The combustion gas is incinerated in the deodorizing furnace 21 together with the gas generated in the furnace, and the combustion gas passes through the gap 27 between the preheating rotary cylinder 1 and the outer cylinder 2 to heat the preheating rotary cylinder 1 and then passes through the chimney 29 to the atmosphere. Will be released.

The waste heat of the heating tube 16 enters the gap 27 through the waste heat tube 38, heats the preheating rotary cylinder 1 from the outside, and a part of the preheating rotary cylinder 1 is squeezed by the damper 40 so as to be reduced.
Heat inside from inside.

Other structures and operations are the same as those of the above embodiment, but the structure is simple and the heat efficiency is high because there is no boiler.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an outline of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a sectional view showing an outline of an embodiment of the present invention.

[Explanation of symbols]

 1: Rotating cylinder for preheating 2: Outer cylinder 7: Falling cylinder 10: Rotating cylinder for carbonization 13: Reflux cylinder 16: Heating tube 17, 22: Burner 18: Boiler 21: Deodorizing furnace 27: Gap 31: Seal part 35 : Blower

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display F23G 7/06

Claims (10)

[Claims] 1. A method of carbonizing organic waste, wherein the organic waste is preheated, fermented or dried, and then heated by radiant heat to be carbonized. 2. The method for carbonizing organic waste according to claim 1, wherein the fermentation bacteria are mixed into the organic waste in advance. 3. A preheating rotary cylinder for preheating and fermenting or drying the organic waste while discharging the organic waste supplied from one end from the other end, and a heating tube for emitting radiant heat by a combustion flame of a burner. And a carbonizing rotary cylinder for carbonizing the exhaust while receiving the discharge from the preheating rotary cylinder from one end and discharging the discharge from the other end. 4. The organic waste according to claim 3, wherein a gas generated from the preheating rotary cylinder is burned in a deodorizing furnace, and the combustion gas is used to heat the preheating rotary cylinder from an outer peripheral surface. Equipment for carbonizing objects. 5. The apparatus for carbonizing organic waste according to claim 3, wherein the gas generated in the rotating cylinder for carbonization is introduced into the rotating cylinder for preheating. 6. The organic waste according to claim 3, wherein the boiler is heated by using the waste heat of the heating tube, and steam generated from the boiler is injected into the rotating cylinder for carbonization. Carbonization equipment. 7. The organic waste carbonizing apparatus according to claim 6, wherein said steam is injected from a seal portion of a rotary cylinder for carbonization. 8. A gas generated from the rotating cylinder for preheating is driven into the rotating cylinder for carbonization, and is burned in a deodorizing furnace together with the gas generated from the rotating cylinder for carbonization. 4. The organic waste carbonizing apparatus according to claim 3, wherein the cylindrical body is heated from the outer peripheral surface. 9. The organic waste carbonizing apparatus according to claim 8, wherein gas generated from the preheating rotary cylinder is injected from a seal portion of the carbonizing rotary cylinder. 10. The organic waste carbonizing apparatus according to claim 8, wherein the preheating rotary cylinder is heated from an outer peripheral surface and an inside thereof by using waste heat of the heating pipe.