JP2002192107A - Apparatus for drying and carbonizing water-containing organic waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for drying and carbonizing water-containing organic waste which is capable of improving the carbonization efficiency with a compact structure. SOLUTION: The apparatus comprises a cylindrical drying furnace for drying water-containing organic wastes and a cylindrical carbonizing furnace for carbonizing the dried wastes both of which are arranged up and down from each other while the respective longitudinal axial directions being set transversely. The drying furnace comprises a cylindrical body in which a stirring and transporting means of a screw is installed in a rotatable manner and the carbonizing furnace comprises a first cylindrical body in which a stirring and transporting means of a screw is installed in a rotatable manner and a second cylindrical body arranged so as to cover the approximately whole body of the former cylindrical body. A hot air blow supply route for supplying hot air flow from a combustion furnace is connected to the second cylindrical body of the carbonizing furnace positioned in the most lower step and spiral screw blades are installed between the second cylindrical body and the first cylindrical body and the screw blades transport the hot air blow spirally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying and carbonizing hydrated organic waste, and more particularly, to an apparatus for drying and carbonizing hydrated organic waste which has a compact structure and can greatly improve the efficiency of carbonization. About.

[0002]

2. Description of the Related Art Conventionally, livestock wastes such as wood wastes, thinned wood, citrons, tangerine pomace, livestock dung, food leftovers, etc., tea leaves, okara, and golf courses scattered in mountain forests. Various devices have been developed as devices for carbonizing so-called water-containing organic waste such as turf.

[0003] As an example, the one shown in FIG. 3 has been proposed. A screw feeder (51) is provided at the lower part of a funnel-shaped hopper (50) for receiving the water-containing organic waste. The carbonization furnace (52) is connected to an input port (54) for supplying waste and has a screw conveyor (5) inside.
5), a heating inner cylinder portion formed by connecting a plurality of cylindrical heating cylinders (53) each of which is rotatably supported at both ends and connected to each other, and a rectangular parallelepiped outer jacket portion (56) surrounding the cylinder portion. Both ends of the heated inner cylindrical portion protruding from the outer jacket (56) are kept warm by appropriate heat insulating means.

A partition wall (5) is provided between the heating cylinders (53).
7) are provided in a zigzag shape, and hot air paths (58a)... (58) for externally heating the heating cylinder (53) with hot air.
d) is formed, and the heating cylinder (53) is kept in a deoxidized state at a high temperature close to the hot blast stove.
d) and drying treatment zones (59a) and (59b) which are kept at a relatively low temperature close to the exhaust port, and are constituted by hot air passages (58
d) is provided with a hot air supply port connected to a hot air outlet (61) of a hot air generating furnace (60) and an exhaust port (63) connected to a smoke exhaust device (62) such as a chimney. Make up the device.

A discharge port (64) provided in a lower cylinder of the carbonization furnace (52) is provided with a cooling device for cooling and separating the carbonized product through an opening / closing device (65) such as a double damper or a rotary valve. A separation device (66) is provided. At each end of the heating tube (53), an exhaust port for exhausting gas generated in the drying and carbonizing zone and an exhaust duct (67) are provided.
Each duct (67) is provided with a regulating valve (68), and the duct of each exhaust port is connected to the smoke exhaust device (62) and the hot air generating furnace (60) with each regulating valve (68). ) Are connected so as to be switchable.

[0006] Since this dry carbonization device is constructed by connecting heating cylinders (53) in a multi-tiered manner,
The whole device can be made compact.

[0007]

However, the above-mentioned dry carbonization apparatus has the following problems. In other words, this dry carbonization device has a hot air passage (58a) (5)
Since no obstacles such as fins are provided inside 8d), the residence time of the hot air is extremely short, and accordingly, the conveyance speed of the screw conveyor (55) is reduced to reduce the residence time of the water-containing organic waste. It is necessary to increase the size, and as a result, there is a problem that the efficiency of drying and carbonization is low. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a dry carbonization apparatus for hydrous organic waste, which can greatly improve the efficiency of drying and carbonization in a compact dry carbonization apparatus. .

[0008]

According to the first aspect of the present invention,
A tubular drying furnace for drying and treating a water-containing organic waste and a tubular carbonizing furnace for carbonizing the waste dried in this drying furnace are arranged such that their respective axial length directions are horizontal. These furnaces are arranged side by side in the vertical direction with the drying furnace positioned on the upper side, and the drying furnace is constituted by a cylindrical body provided with a stirring and transfer means rotatable therein, which includes a screw, The carbonization furnace is disposed in one or more stages, and the furnace of each stage covers a first cylindrical body in which a stirring and transfer means including a screw is rotatably provided therein, and substantially the entirety of the cylindrical body. The downstream end of the drying furnace and the upstream end of the carbonization furnace located at the uppermost stage are connected in an internal communication state, and the adjacent carbonization furnaces are configured as follows. Downstream end of the first cylindrical body of the carbonization furnace located at the upper stage The upstream end of the first cylindrical body of the carbonization furnace located at the lower stage is connected in internal communication with the downstream end of the second cylinder of the carbonization furnace located at the upper stage and the first end of the carbonization furnace located at the lower stage. The upstream end of the two cylinders is connected in an internal communication state, and a hot air supply path for supplying hot air from the combustion furnace is connected to the second cylinder of the carbonization furnace located at the lowermost stage, and the carbonization of this stage is performed. A carbide discharge port is formed in the first cylindrical body of the furnace, and spiral fins are provided between the second cylindrical body and the first cylindrical body, and the fins allow hot air to spirally travel. This is a dry carbonization device for hydrous organic waste.

The invention according to a second aspect of the present invention provides a cylindrical drying furnace for drying a water-containing organic waste and a cylindrical carbonizing furnace for carbonizing the waste dried in the drying furnace. The furnaces are arranged so that the axial direction is horizontal, and these furnaces are vertically arranged side by side with the drying furnace positioned above, and the drying furnace has a stirring and transfer means comprising a screw inside. A first cylinder comprising a rotatably provided cylindrical body, wherein the carbonization furnace is disposed in one or more stages, and each stage furnace is rotatably provided with a stirring and transfer means comprising a screw therein. And a second cylindrical body provided so as to cover substantially the entirety of the cylindrical body. The downstream end of the drying furnace and the upstream end of the carbonization furnace located at the uppermost stage are in internal communication with each other. And carbonization furnaces adjacent to each other The downstream end of the first cylindrical body of the carbonizing furnace and the upstream end of the first cylindrical body of the carbonizing furnace located at the lower level are connected in internal communication with each other and the second cylindrical body of the carbonizing furnace located at the upper level. The downstream end and the upstream end of the second cylindrical body of the carbonization furnace located at the lower stage are connected in an internal communication state, and hot air from the combustion furnace is supplied to the second cylinder of the carbonization furnace located at the lowermost stage. A hot air supply path is connected and a carbide discharge port is formed in the first cylinder of the carbonization furnace at this stage, and the hot air path formed between the second cylinder and the first cylinder is The hot air that is connected to the cylindrical body of the furnace and supplied into the second cylindrical body through the hot air supply path is subsequently introduced into the cylindrical body of the drying furnace, and the hot air removes the water-containing organic waste in the drying furnace. This is a device for drying and carbonizing hydrated organic waste, which is directly heated.

According to a third aspect of the present invention, the upstream end of the drying furnace is connected to a secondary combustion furnace through a pipe, and the gas discharged from the waste is completely burned in the secondary combustion furnace. The dry carbonization apparatus for hydrous organic waste according to claim 1 or 2, wherein dioxins contained therein are decomposed and made harmless. The invention according to claim 4 is the dry carbonization apparatus for hydrous organic waste according to claim 1 or 2, wherein the carbonization furnace is arranged in two stages. According to a fifth aspect of the present invention, a rotary valve for preventing gas leakage is provided in both a pipe line connecting an upstream end of the drying furnace and the hopper and a carbide discharge port of a carbonization furnace located at the lowest stage. The dry carbonization apparatus for hydrous organic waste according to claim 1 or 2, wherein According to a sixth aspect of the present invention, a dry distillation gas suction blower is provided in a pipe connecting the vicinity of the downstream end of the second cylindrical body located at the lowermost stage and the combustion furnace, and the dry distillation inside the second cylindrical body is performed by the blower. The gas is forcibly supplied into the combustion furnace.
Or a dry carbonization device for hydrous organic waste according to 2. The invention according to claim 7 is provided with an injection device for injecting each of cold water, activated carbon, and slaked lime into the exhaust gas discharged from the secondary combustion furnace, and the injection injects and harmlessly absorbs dioxins and hydrogen chloride gas. The apparatus for drying and carbonizing a water-containing organic waste according to claim 3, wherein the carbonization is performed.

[0011] The invention according to claim 8 is a cylindrical drying furnace which is disposed so that the water-containing organic waste is dried and whose axial direction is vertical, and the waste which is dried in this drying furnace. A cylindrical carbonizing furnace arranged so that the axial direction becomes vertical while carbonizing the material, and a cylindrical carbonizing furnace arranged so that the axial direction becomes vertical while heating this carbonizing furnace from the outside A hot air path, wherein the carbonizing furnace is disposed concentrically with the drying furnace so as to surround the drying furnace, and the hot air path is concentric with the carbonizing furnace so as to surround the carbonizing furnace. The drying furnace is constituted by a cylindrical body provided with a stirring and upper transfer means rotatably provided therein, and the carbonizing furnace is constituted by a cylindrical body having a gap between the drying furnace and the drying furnace. Waste that has overflowed from the upper end of the drying oven The lower part of the hot air passage is connected to the lower part of the drying furnace through a pipe, and the lower part of the carbonizing furnace is connected to the hot air supply means for supplying hot air to the hot air path through the pipe. Has been
In the vicinity of the upper end of the drying furnace, a suction device for sucking gas discharged from the upper end of the drying furnace is connected through a pipe, and at the lower end of the drying furnace, water-containing organic waste is contained in the drying furnace. A dry carbonization apparatus for hydrated organic waste, characterized in that a waste supply means for supplying water is provided, and a carbon discharge means is provided at a lower end of the carbonization furnace.

According to a ninth aspect of the present invention, the carbonizing furnace is constituted by a cylindrical body in which a spiral ribbon screw blade is rotatably provided in a gap between the carbonizing furnace and a drying furnace, and the ribbon screw blade is rotationally driven. The drying and carbonizing apparatus for hydrous organic waste according to claim 8, wherein the drying waste overflowing from the upper end of the drying furnace is agitated and lowered while making a spiral motion. According to a tenth aspect of the present invention, in the hot air path, a hot air supply means is provided on an upper portion thereof, and the hot air supply means is arranged so as to blow hot air in a circumferential direction of the hot air path. The apparatus for drying and carbonizing a water-containing organic waste according to claim 8, wherein descends spirally. The above problems are completely solved by providing these inventions.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Regarding a first embodiment of the present invention,
This will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an apparatus for drying and carbonizing hydrous organic waste according to the first embodiment. The drying carbonization device according to the present invention includes a cylindrical drying furnace (1) for drying and processing a water-containing organic waste (22), and a cylindrical drying furnace for carbonizing the waste dried in the drying furnace (1). The carbonizing furnace (2) is arranged so that the axial length direction is horizontal, and these furnaces are arranged side by side in the vertical direction with the drying furnace (1) positioned above. . In the present invention, first, the water-containing organic waste is dried in a drying furnace (1), and thereafter, the dried waste is carbonized in a carbonizing furnace (2).

The drying furnace (1) has a screw (3) inside.
And a cylindrical body (7) rotatably provided with a stirring and transferring means. The screw (3) is rotated in the cylindrical body (7) by the power of a rotary drive device (4) composed of an electric motor or the like, and the rotation is used to agitate the hydrous organic waste, and at the same time, to agitate the aqueous waste from the upstream end to the downstream end. Transfer to the department. The screw (3) may be a normal screw in which the entire inner edge of the screw blade is directly fixed to the outer peripheral surface of the rotating shaft, or a ribbon screw blade may be attached to the outer peripheral surface of the rotating shaft via a plurality of stays. The ribbon screw may be attached and have a predetermined space between the inner edge of the ribbon screw blade and the outer peripheral surface of the rotating shaft. Although only one drying oven is provided in the illustrated example, the drying oven (1) may be arranged in a plurality of stages such as two stages or three stages in the present invention. When juxtaposed in a plurality of stages, the adjacent drying ovens (1) are connected to the downstream end of the upper drying oven (1) and the upstream end of the lower drying oven (1), They are connected so as to form a zigzag shape as a whole.

[0015] The drying furnace (1) is used to remove the aqueous organic waste (2).
2) direct heating type by directly contacting with hot air;
Instead of directly contacting the water-containing organic waste (22) with hot air, the indirect heating method of heating the water-containing organic waste (22) indirectly by heating the cylindrical body (7) from the outside. However, a direct heating type shown in the illustrated example is preferable. In the case of the direct heating type, since the heating efficiency for the water-containing organic waste (22) is good and the evaporated water can be scattered quickly, the water-containing organic waste (22) can be dried quickly. it can. still,
In the case of the indirect heating type, an outer cylinder (not shown) is provided so as to concentrically cover the cylinder (7), and hot air is passed through a gap between the cylinder (7) and the outer cylinder. Thereby, the cylindrical body (7) can be heated and indirect heating of the water-containing organic waste (22) can be performed. In this case, it is desirable to provide a spiral fin (not shown) in the gap in a fixed state. By providing the spiral fins, the residence time of the hot air in the air gap can be lengthened, and the heat transfer to the cylinder (7) can be promoted.

The carbonizing furnace (2) carbonizes the waste that has been dried in the drying furnace (1). Carbonization furnace (2)
Is provided in one or more stages (two stages in the illustrated example), and a first cylindrical body in which a furnace (2) of each stage is rotatably provided with a stirring and transfer means comprising a screw (3) therein. (5) and a second cylindrical body (6) provided so as to cover substantially the entirety of the cylindrical body (5). The screw (3) is rotated in the first cylindrical body (5) by the power of a rotary driving device (4) composed of an electric motor or the like, and the rotation agitates the waste and simultaneously disposes the waste from the upstream end to the downstream end. Transfer to. The screw (3) may be a normal screw in which the entire inner edge of the screw blade is directly fixed to the outer peripheral surface of the rotating shaft, or a ribbon screw blade may be attached to the outer peripheral surface of the rotating shaft via a plurality of stays. Alternatively, the ribbon screw may have a predetermined space between the inner edge of the ribbon screw blade and the outer peripheral surface of the rotating shaft. When the carbonization furnaces (2) are provided in a plurality of stages as in the illustrated example, the adjacent carbonization furnaces (2) are connected to each other at the downstream end of the carbonization furnace (2) located at the upper stage and the carbonization furnace (2) located at the lower stage. Are connected so as to form a zigzag shape as a whole.

The upstream end of the carbonizing furnace (2) located at the uppermost stage and the downstream end of the drying furnace (1) are connected in an internal communication state. At the connection point, a filter (not shown) that allows hot air to pass through but does not allow dry waste to pass between the upper extension of the first cylinder (5) and the upper extension of the second cylinder (6). Is preferably provided. Thereby, the first cylinder (5) and the second cylinder (6)
During this time, that is, the waste can be prevented from falling on the hot air path. Adjacent carbonization furnaces (2) are the downstream end of the first cylindrical body (5) of the carbonization furnace (2) located at the upper stage and the first cylindrical body (5) of the carbonization furnace (2) located at the lower stage.
Are connected in an internal communication state, and
The downstream end of the second cylindrical body (6) of the carbonization furnace (2) located in the upper stage and the upstream end of the second cylindrical body (6) of the carbonization furnace (2) located in the lower stage are in internal communication. Are linked.
A hot air supply path (9) for supplying hot air from the primary combustion furnace (8) is connected to the second cylindrical body (6) of the carbonization furnace (2) located at the lowermost stage. A carbide outlet (10) is formed in the first cylindrical body (5) of 2).

In each of the carbonizing furnaces (2), a hot air passage (1) formed between the second cylindrical body (6) and the first cylindrical body (5).
In 1), a spiral fin (12) is provided in a fixed state so as to be wound around the first cylindrical body (5), and the fin (12) causes hot air to spirally move. Has become. By making the hot air spirally travel, the residence time of the hot air in the hot air passage (11) can be extended without reducing the speed of the hot air, thereby promoting heat transfer to the cylindrical body (7).

The upstream end of the drying furnace (1) is connected to a secondary combustion furnace (13) through a pipe, and in this secondary combustion furnace (13), gas emitted from waste is converted into a kerosene burner. To complete combustion. Drying the waste,
During carbonization, harmful gases such as dioxin and various odorous gases may be generated in addition to the carbonized gas. The carbonization gas, which can be a fuel, is mainly sent to the primary combustion furnace (8), where it is burned by a burner, and is effectively used as a heat source for drying and carbonizing waste. On the other hand, the gas which is not expected to be used as fuel is sent from the upstream end of the drying furnace (1) to the secondary combustion furnace (13), where dioxins contained in the gas are decomposed and made harmless, and harmless and odorless. Gas. The suction force for guiding the gas in the drying furnace (1) to the secondary combustion furnace (13) is provided by a suction blower (27).

The upstream end of the drying furnace (1) is connected to a hopper (21) via a pipe. A rotary valve (14) is provided in both this pipe line and the carbide discharge port (10) of the carbonization furnace (2) located at the lowest stage. Since the rotary valve (14) has a structure that allows only the flow of solids while blocking the flow of air, it should be provided at the inlet of the drying furnace (1) and the outlet of the carbonizing furnace (2), respectively. Thus, it is possible to prevent the gas that can be a fuel and the harmful gas from being released into the atmosphere.

A pipe connecting the vicinity of the downstream end of the second cylindrical body (6) located at the lowermost stage to the primary combustion furnace (8) is provided with a dry distillation gas suction blower (15). (15) forcibly guides the carbonization gas in the second cylindrical body (6) into the primary combustion furnace (8). As a result, the carbonized gas that can serve as fuel can be reliably introduced into the primary combustion furnace (8), and this gas can be effectively used as a heat source. This gas is released near the burner of the primary combustion furnace (8). Therefore, the fuel gas can be efficiently burned.

The secondary combustion furnace (13) includes a secondary combustion furnace (1).
An injection tower (16) for injecting each of cold water, activated carbon and slaked lime to the gas emitted from 3) is connected through a pipe. By providing such an injection tower (16), a high-temperature gas can be set to a normal temperature at which it can be released into the atmosphere, and dioxins and hydrogen chloride gas can be made harmless by adsorption to make the gas safer. The gas thus made safe is discharged from the chimney (18) to the atmosphere through the bag filter (17).

Next, the operation of the dry carbonizing apparatus will be described with reference to FIG. Via a belt conveyor (19)
A water-containing organic waste (22) (hereinafter referred to as waste (22)) is supplied to the first hopper (20). The waste (22) in the first hopper (20) is pulverized into small pieces by a pulverizer (23) and supplied to the second hopper (21). The waste (22) in the second hopper (21) is supplied to the drying furnace (1) by a fixed amount via the rotary valve (14). In the drying furnace (1), hot air somewhat lower in temperature than in the carbonizing furnace (2) is supplied through the first cylindrical body (5) of the carbonizing furnace (2), and the waste (22) is heated by the hot air. While being directly dried by the contact of, it is conveyed downstream in the drying furnace (1).

The dried waste (22) is supplied to a carbonization furnace (2).
In the first cylindrical body (5). High-temperature hot air is supplied from the primary combustion furnace (8) into the second cylindrical body (6) of the carbonization furnace (2), and the hot air is spirally formed by the spiral fins (12). I'm moving. The waste (22) is conveyed downstream in the first cylindrical body (5) by rotation of the screw (3). On the other hand, the hot air moves in the second cylindrical body (6) to the upstream side along the fins (12). That is, these flows are in countercurrent to each other. The waste (22) is reliably carbonized in the carbonization furnace (2). The carbonized waste (22) is discharged through a rotary valve (14) to a carbide storage tank (24).

Hot air for indirectly applying heat to the waste (22) and carbonizing it is supplied from the primary combustion furnace (8). The waste (22) in the carbonization furnace (2) generates carbonized gas while carbonizing. This carbonization gas is sucked out of the lowermost carbonization furnace (2) by the suction blower (15), supplied to the primary combustion furnace (8), and utilized there as fuel.

The hot air in the second cylindrical body (6) of the carbonizing furnace (2) is supplied into the cylindrical body (7) of the drying furnace (1) through the uppermost second cylindrical body (6). The waste (22) is brought into direct contact with the waste (22) and dried directly. Therefore, the efficiency of applying heat to the waste (22) is extremely good, and the waste (22) can be dried quickly.

The hot air in the drying furnace (1) is supplied to a suction blower (2).
By the operation of 7), it is sucked out from the upstream end of the drying furnace (1) and guided into the secondary combustion furnace (13). The hot air may contain harmful gases and odorous gases in the drying furnace (1), and these gases are supplied to the secondary combustion furnace (13).
It is completely burned inside and becomes harmless and odorless gas.

The gas exiting the secondary combustion furnace (13) is guided into the injection tower (16) by the operation of the suction blower (27), where cold water, activated carbon, and slaked lime are injected and cooled to room temperature. It is a safer gas. The detoxified gas is released into the atmosphere from the chimney.

According to the dry carbonizing apparatus according to the first embodiment, the drying furnace (1) and the carbonizing furnace (2) are arranged so that their respective axial lengths are horizontal, and they are arranged side by side in the vertical direction. This makes the entire device compact,
By providing the spiral fins (12) in the hot air passage (11) formed between the second cylindrical body (6) and the first cylindrical body (5), the carbonization efficiency can be greatly improved. The hot air supplied into the second cylindrical body (6) through the hot air supply path (9) is subsequently introduced into the cylindrical body (7) of the drying furnace (1), and the hot air is supplied to the drying furnace (1). Waste (2
Since 2) is directly heated, the drying efficiency can be greatly improved.

Next, a dry carbonization apparatus for hydrous organic waste according to a second embodiment will be described. FIG. 2 is a schematic configuration diagram illustrating a dry carbonization device according to the second embodiment. still,
The concentric view shown on the upper side of FIG. 2 is a schematic configuration diagram when a main part of the present apparatus is viewed from above. The drying and carbonizing apparatus includes a cylindrical drying furnace (1) arranged to dry a water-containing organic waste (22) and to have a longitudinal axis extending in a vertical direction, and drying in the drying furnace (1). A cylindrical carbonization furnace (2) that carbonizes the treated waste (22) and is arranged so that the axial direction is vertical.
And a cylindrical hot air path (11) arranged to heat the carbonization furnace (2) from the outside and to have the axial direction of the furnace become vertical. The carbonizing furnace (2) is disposed concentrically with the drying furnace (1) so as to surround the drying furnace (1), and the hot air path (11) is configured to surround the carbonizing furnace (2). It is arranged concentrically with 2).

The drying furnace (1) is used to remove the aqueous organic waste (2)
2) (hereinafter referred to as waste (22)) is subjected to drying treatment. The drying oven (1) has a screw (3) inside.
The screw (3) is rotatably driven by a rotation driving device provided below, which comprises a cylindrical body (7a) rotatably provided with a stirring and upper transfer means comprising:

The carbonization furnace (2) heats the waste (22) indirectly from the outside and carbonizes it in a poor oxygen state. The carbonizing furnace (2) is composed of a cylindrical body (7b) having a gap between itself and the drying furnace (1), and drying waste (22) overflowing from the upper end of the drying furnace (1) passes through the gap. And can be moved downward.

The lower part of the hot air path (11) is connected to the lower part of the drying furnace (1) through a pipe, and the lower part of the carbonizing furnace (2) is connected to a hot air supply means (28) for supplying hot air to the hot air path (11). Connected through. The hot air supply means (28)
Fan (35) for sucking dry distillation gas in carbonization furnace (2)
And a combustion furnace (36) in which the carbonized gas sucked out of the carbonization furnace (2) by the fan (35) is burned by a burner together with an auxiliary fuel such as kerosene.

In the vicinity of the upper end of the drying furnace (1), a suction device (29) for sucking gas discharged from the upper end of the drying furnace (1) is connected through a pipe. Suction device (2
9) is composed of a fan (32) and a dust collector (33) provided in front of the fan (32), and a chimney (34) is provided downstream of the fan (32).

A waste supply device (30) for supplying waste (22) into the drying furnace (1) is connected to a lower end of the drying furnace (1). A discharge device (31) is connected. Waste supply device (30)
Can be constituted by a hopper (37) and a screw conveyor (38) connected to the hopper (37) and arranged so that the axial direction is horizontal. The carbide discharge device (31) can be composed of a screw conveyor (39) arranged so that the axial direction is horizontal.

The carbonizing furnace (2) is composed of a cylindrical body (7b) in which a spiral ribbon screw blade (45) is rotatably provided in a space between the carbonizing furnace (2) and the drying furnace (1). Is preferred. The ribbon screw blade (45) is rotationally driven by a rotary driving device provided above, and rotates around the drying oven (1). In this case, the ribbon screw blade (45) lowers the dried waste (22) overflowing from the upper end of the drying furnace (1) while spirally moving, and reduces the waste in the carbonization furnace (2). The stirring and mixing can be sufficiently performed with power. Waste (2
The waste (22) is uniformly and uniformly heated from the cylindrical body (7b) by lowering and agitating and mixing 2) while spirally moving downward, thereby uniformly carbonizing the waste (22) and carbonizing efficiency. Can be greatly improved.

The hot air path (11) is provided with a hot air supply means (28) at an upper portion thereof, and the hot air supply means (28) is arranged so as to blow hot air along the circumferential direction of the hot air path (11). Is preferred. in this case,
The hot air can descend while spirally turning along the inner surface of the hot air path (11). By lowering the hot air from the hot air supply means (28) in a spiral shape, the residence time of the hot air in the hot air passage (11) increases without reducing the speed of the hot air, and heat transfer to the carbonization furnace (2). Can be greatly promoted.

Next, the operation of the dry carbonizing apparatus according to the second embodiment will be described with reference to FIG. When the waste (22) is put into the first hopper (20), the waste (22) is crushed and mixed by the crushing / mixing machine (40), and is conveyed to the second hopper (37) by the conveyor (41). It is transported up. The waste (22) dropped into the hopper (37) is transported into the drying oven (1) by the screw conveyor (38). The waste (22) reaching the lower part in the drying furnace (1) is transferred upward while being stirred by the screw (3). At this time, waste (22)
Directly contacts the hot air introduced from the hot air supply means (28) into the drying furnace (1), and the waste (22) is efficiently dried.

The waste (2) reaching the upper end of the drying oven (1)
2) overflows from its upper end and falls into the carbonization furnace (2). Air is sucked by a fan (32) near the upper end of the drying furnace (1). The waste (22) that has fallen into the carbonization furnace (2) moves downward in the carbonization furnace (2) in an oxygen-free state containing almost no air. At this time, if the spiral ribbon screw blades (45) are rotated in the carbonization furnace (2), the waste (22) is stirred and mixed, and a uniform carbonization treatment is performed. In addition, the hot air is
By spirally descending inside 1), the residence time of the hot air in the hot air passage (11) is lengthened, and as a result, the carbonization efficiency of the waste (22) is greatly improved.

The dry carbonization device according to the second embodiment is
Similar to the dry carbonization apparatus according to the first embodiment, the entire apparatus can be made compact, and the efficiency of drying and carbonizing the waste (22) can be greatly improved.

[0041]

According to the first aspect of the present invention, the drying apparatus and the carbonizing furnace are arranged so that their axial directions are horizontal and are arranged side by side in the vertical direction, so that the entire apparatus can be made compact. By reducing the installation area and providing spiral fins in a hot air passage formed between the second cylindrical body and the first cylindrical body, the efficiency of carbonization can be greatly improved.

According to the second aspect of the present invention, the drying furnace and the carbonizing furnace are arranged so that their respective axial lengths are horizontal, and they are arranged side by side in the vertical direction, so that the entire apparatus is compact. By reducing the area and directly contacting the hot air with the waste in the drying furnace and directly heating the same, the drying efficiency can be greatly improved, and the carbonization efficiency can be greatly improved.

According to the third aspect of the present invention, the harmful gas and odorous gas emitted from the waste are completely burned in the secondary combustion furnace, so that the gas can be made harmless and odorless.

According to the fourth aspect of the present invention, since the carbonization furnaces are arranged in two stages, carbonization can be reliably performed while reducing the installation area of the apparatus.

According to the fifth aspect of the present invention, the rotary valve is provided in both the pipe line connecting the upstream end of the drying furnace and the hopper and the carbide discharge port of the carbonization furnace located at the lowest stage. In addition, it is possible to reliably prevent various gases generated during the drying and carbonization of waste from leaking into the atmosphere.

According to the sixth aspect of the present invention, a dry distillation gas suction blower is provided in a pipe connecting the vicinity of the downstream end of the second cylindrical body located at the lowermost stage with the combustion furnace. Since the carbonized gas in the cylinder is forcibly supplied into the combustion furnace, the carbonized gas generated during carbonization can be effectively used as a heat source for the carbonization.

According to the seventh aspect of the present invention, since the injection device for injecting each of cold water, activated carbon and slaked lime into the exhaust gas discharged from the secondary combustion furnace is provided, the gas discharged from the secondary combustion furnace is provided. At room temperature and with higher safety.

According to the eighth aspect of the invention, it is possible to reduce the installation area by making the entire apparatus compact, and to greatly improve the efficiency of drying and carbonizing the waste.

According to the ninth and tenth aspects of the present invention, the carbonization efficiency of waste can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an apparatus for drying and carbonizing a hydrous organic waste according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating an apparatus for drying and carbonizing a water-containing organic waste according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing a conventionally proposed apparatus for drying and carbonizing hydrous organic waste.

[Explanation of symbols]

 1. Drying furnace 2. Carbonizing furnace 3. Screw 5. First cylindrical body 6. Second cylindrical body 7. Body 8 Primary combustion furnace 9 Hot air supply path 10 Carbide discharge port 11 Hot air path 12 Fins 13 Two Next combustion furnace 14 Rotary valve 15 Carbonized gas suction blower 16 Injection tower 22 Waste 27 Suction blower 28 · Hot air supply means 30 ···· Carbide supply means 31 ···· Carbide discharge means 45 ···· Ribbon screw blade

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akira Yokokawa 185 Miyanoguchi, Tosayamada-cho, Kami-gun, Kochi F-term in Kochi University of Technology (Reference) 3L113 AA04 AB04 AC40 BA36 CB29 DA02 DA14 4D004 AA02 AB06 AB07 BA06 CA15 CA26 CA42 CA47 CB31 CB36 CB42 CB45 CC11 4H012 HA03 HA05 HA06 HB03 HB05 HB07 HB09

Claims (10)

[Claims] 1. A cylindrical drying furnace for drying and treating a water-containing organic waste, and a cylindrical carbonizing furnace for carbonizing a waste dried in the drying furnace, each of which has an axial direction in a horizontal direction. And these furnaces are vertically arranged side by side with the drying furnace positioned on the upper side, and the drying furnace is provided with a rotatable stirring and transfer means comprising a screw inside. The carbonization furnace is provided in one or more stages, and the furnace of each stage is a first cylindrical body in which a stirring and transfer means comprising a screw is rotatably provided therein, and this cylindrical body And a second cylindrical body provided to cover substantially the entirety of the
The downstream end of the drying furnace and the upstream end of the carbonization furnace located at the uppermost stage are connected in an internal communication state, and adjacent carbonization furnaces are located downstream of the first cylindrical body of the carbonization furnace located at the upper stage. The end and the upstream end of the first cylindrical body of the carbonization furnace located at the lower stage are connected in an internal communication state, and the downstream end of the second cylinder of the carbonization furnace located at the upper stage and the carbonization furnace located at the lower stage The upstream end of the second cylindrical body is connected in an internal communication state, and a hot air supply path for supplying hot air from the combustion furnace is connected to the second cylindrical body of the carbonization furnace located at the lowermost stage, and this stage is connected to the second cylindrical body. A carbide discharge port is formed in the first cylindrical body of the carbonizing furnace, and a spiral fin is provided between the second cylindrical body and the first cylindrical body, and the fin makes the hot air spirally advance. A dry carbonization device for hydrated organic waste, characterized in that: 2. A cylindrical drying furnace for drying and treating a water-containing organic waste, and a cylindrical carbonizing furnace for carbonizing the waste dried in the drying furnace, each of which has an axial direction of a horizontal direction. And these furnaces are vertically arranged side by side with the drying furnace positioned on the upper side, and the drying furnace is provided with a rotatable stirring and transfer means comprising a screw inside. The carbonization furnace is provided in one or more stages, and the furnace of each stage is a first cylindrical body in which a stirring and transfer means comprising a screw is rotatably provided therein, and this cylindrical body And a second cylindrical body provided to cover substantially the entirety of the
The downstream end of the drying furnace and the upstream end of the carbonization furnace located at the uppermost stage are connected in an internal communication state, and adjacent carbonization furnaces are located downstream of the first cylindrical body of the carbonization furnace located at the upper stage. The end and the upstream end of the first cylindrical body of the carbonization furnace located at the lower stage are connected in an internal communication state, and the downstream end of the second cylinder of the carbonization furnace located at the upper stage and the carbonization furnace located at the lower stage The upstream end of the second cylindrical body is connected in an internal communication state, and a hot air supply path for supplying hot air from the combustion furnace is connected to the second cylindrical body of the carbonization furnace located at the lowermost stage, and this stage is connected to the second cylindrical body. A carbide outlet is formed in the first cylindrical body of the carbonizing furnace, and a hot air path formed between the second cylindrical body and the first cylindrical body is connected to the cylindrical body of the drying furnace. Hot air supplied into the second cylindrical body through the hot air supply path is subsequently introduced into the cylindrical body of the drying furnace, Drying carbonization apparatus hydrous organic waste hot air is characterized by heating a water-containing organic waste in the drying furnace directly. 3. An upstream end of the drying furnace is connected to a secondary combustion furnace through a pipe, and completely burns gas discharged from waste in the secondary combustion furnace, thereby obtaining dioxins contained in the gas. 3. The apparatus for drying and carbonizing hydrous organic waste according to claim 1 or 2, wherein the apparatus is decomposed and made harmless. 4. The apparatus for drying and carbonizing hydrated organic waste according to claim 1, wherein the carbonization furnace is arranged in two stages. 5. A rotary valve for preventing gas leakage is provided in both a pipe connecting the upstream end of the drying furnace and the hopper and a carbide discharge port of a carbonization furnace located at the lowest stage. The dry carbonization device for hydrous organic waste according to claim 1 or 2, wherein: 6. A dry distillation gas suction blower is provided in a pipe connecting the vicinity of the downstream end of the second cylindrical body located at the lowermost stage to the combustion furnace, and the blower is used to force the dry distillation gas in the second cylindrical body. The apparatus for drying and carbonizing hydrous organic waste according to claim 1 or 2, wherein the apparatus is supplied to a combustion furnace. 7. An injection device for injecting each of cold water, activated carbon, and slaked lime into exhaust gas discharged from the secondary combustion furnace is provided, and the injection detoxifies and detoxifies dioxins and hydrogen chloride gas. Claim 3 characterized by the following:
A device for drying and carbonizing a water-containing organic waste according to Claim 1. 8. A drying oven having a cylindrical shape, which is disposed so that a water-containing organic waste is subjected to drying treatment and whose axial direction is vertical, a carbonized waste treated in this drying oven, and a shaft. It has a cylindrical carbonizing furnace arranged such that the longitudinal direction is the vertical direction, and a cylindrical hot air path arranged so that the axial direction is the vertical direction while heating the carbonizing furnace from the outside. Wherein the carbonizing furnace is disposed concentrically with the drying furnace so as to surround the drying furnace, and the hot air path is disposed concentrically with the carbonizing furnace so as to surround the carbonizing furnace. The drying furnace is constituted by a cylindrical body provided with a stirring and upper transfer means rotatably provided therein, and the carbonizing furnace is constituted by a cylindrical body having a gap between the drying furnace and the upper end of the drying furnace. The overflowing dry waste goes down through this void The lower part of the hot air path is connected to a lower part of the drying furnace through a pipe, and the lower part of the carbonizing furnace is connected to a hot air supply unit that supplies hot air to the hot air path through a pipe. In the vicinity of the upper end of the furnace, a suction device for sucking gas discharged from the upper end of the drying furnace is connected through a pipe, and at the lower end of the drying furnace, hydrated organic waste is supplied into the drying furnace. A dry carbonization apparatus for hydrated organic waste, wherein a waste supply means is provided, and a carbide discharge means is provided at a lower end of the carbonization furnace. 9. The carbonizing furnace comprises a cylindrical body in which a spiral ribbon screw blade is rotatably provided in a gap between the carbonizing furnace and a drying furnace. The drying furnace is driven by rotating the ribbon screw blade. 9. The apparatus for drying and carbonizing a water-containing organic waste according to claim 8, wherein the dried waste overflowing from the upper end of the water is agitated and lowered while making a spiral movement. 10. The hot air path is provided with a hot air supply means at an upper portion thereof, and the hot air supply means is arranged so as to blow hot air along a circumferential direction of the hot air path. The apparatus for drying and carbonizing a water-containing organic waste according to claim 8, wherein the apparatus is dried.