JP2935407B2 - Drying and incineration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying and incineration apparatus for incinerating wastes, particularly incinerators such as combustible sludge, while preventing generation of offensive odor.

[0002]

2. Description of the Related Art Wastes having a high water content include, for example, residues generated during fishery processing and side dish processing and livestock wastes (including poultry manure). In particular, the sludge treated in wastewater in food processing has an extremely large amount of water, and even after dewatering, contains more than 80% of water and is in the form of a mud, and also contains a very large amount of fats and oils. ing.
Therefore, it is very difficult to dispose of such waste due to environmental problems, and there has been a demand for a drying apparatus or an incineration apparatus having an appropriate capacity to be installed in a processing plant for drying or incineration.

Conventionally, as an incinerator for incinerating such waste having a high water content, for example, there is a large rotary kiln type incinerator. This incinerator supplies incineration material into a drum, injects combustion gas from a burner into the drum while rotating the drum, and incinerates the incineration material by heating the incineration material with the combustion gas to evaporate moisture and dry. Is what you do.

[0004]

However, in the above-mentioned conventional incinerator, since the incinerated material is directly heated and burned while evaporating water, it is difficult to reach a high temperature, and a long rotary kiln is required. There is a problem that a large amount of fuel is consumed and the combustion efficiency is very poor. In addition, the oil and fats contained in the incineration cannot be thermally decomposed sufficiently due to the difficulty in raising the temperature, and the odorous components are discharged together with the water vapor to generate a bad smell, adversely affecting the surrounding environment, and causing pollution problems. It has become.

[0005] The present invention has been made in view of the above points, and efficiently dries incinerated materials such as combustible sludge, and incinerates by sufficiently removing fats and oils and odor components generated during drying. It is an object of the present invention to provide a drying and incineration apparatus that prevents generation of offensive odor.

[0006]

According to the present invention, in order to achieve the above object, according to the present invention, a coil is provided spirally from the base end to the tip on the outer periphery of a cylindrical body rotatably housed in a trough. A drying conveyer that conveys the incinerated material conveyed to the base end of the trough to the tip while drying it, and a drying burner that is disposed at the base end of the trough and injects a flame into the cylinder to heat the cylinder. A dehumidifying unit that supplies gas evaporated from the incinerated material to the vicinity of the flame in the cylindrical body to dehumidify the gas; and a combustion furnace that is disposed on the discharge side of the drying conveyor and burns the incinerated material conveyed. And an exhaust gas recirculation means for recirculating exhaust gas from the combustion furnace to the trough.

According to a second aspect of the present invention, the intensity of the flame is controlled in accordance with the temperature of the vaporized gas. Claim 3
In this configuration, a shield plate is provided near the front end of the coil of the drying conveyer to suppress the flame from blowing from the cylindrical body to the combustion furnace. In claim 4, the drying conveyer is provided with a scraping means for abutting the outer end surface of the cylindrical body between the respective pitches of the coil, and scraping off the incinerated material conveyed while the other end is supported by the trough. It is configured.

[0008]

The incineration material supplied into the trough is conveyed while being dried by indirect heating by a drying conveyor. The mixed gas such as water vapor, oil and fat, and odor component generated when the incinerated material is dried is sent from the trough to the vicinity of the flame of the drying burner in the cylinder of the drying conveyor, and the oil and fat are completely burned in the cylinder. And the odor components are thermally decomposed. Furthermore,
Since the mixed gas is sent from the trough into the cylinder, the inside of the trough is dried, and the drying efficiency is improved. Thereby, the bad odor generated when the incinerated material is dried is removed. The dried incineration is transported to a combustion furnace and incinerated. The high-temperature exhaust gas generated by the incineration is returned to the trough and directly heats the incineration. This promotes drying of the incinerated material. The exhaust gas that has heated the incinerated material is sent into the cylindrical body of the drying conveyor together with the mixed gas, and the odor contained in the exhaust gas is thermally decomposed. Thereby, the incinerated material is incinerated with the odor almost completely removed.

According to the second aspect of the present invention, the intensity of the flame is proportionally controlled in accordance with the temperature of the vaporized gas in the drying burner, so that fuel can be saved and overheating of the drying conveyor and the trough is prevented. According to the third aspect, the shielding plate suppresses the flame that blows out from the drying conveyor into the combustion furnace, thereby preventing the incinerated material being scattered or blowing out during combustion, and the incinerated material is satisfactorily burned.

According to the fourth aspect, the incineration material is prevented from being scraped off by the scraping means and fixed to the cylindrical body of the drying conveyor, thereby contributing to the promotion of drying by the stirring action.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1 and FIG.
Is disposed on the side of the leading end 2b of the drying conveyor 2, which conveys the incinerated material supplied from the base end 2a side while evaporating and drying the moisture by indirect heating, and is conveyed from the drying conveyor 2. The combustion furnace 3 that burns the incinerated material, the driving mechanism 4 that is disposed on the base end 2a side of the drying conveyor 2 and that drives the rotation of the drying conveyor 2, is provided on the base end 2a of the drying conveyor 2 and is supplied. A drying burner 5 for drying the incinerated material and burning the incinerated material conveyed into the combustion furnace 3; an incineration blower 6 provided on the side wall of the combustion furnace 3; a reburn burner 7 and an afterburner 8; The decompressed cyclone 9, the exhaust blower 10, the chimney 11, and the gas evaporated in the drying conveyor 2 are fed to the base 2a side of the drying conveyor 2 to dehumidify the inside of the drying conveyor 2. 2, and is provided with an exhaust gas recirculation blower 13 like the exhaust gas discharged from the combustion furnace 3 is refluxed to dry conveyor 2 side. The drying conveyor 2 and the combustion furnace 3 are supported by a plurality of legs 14.

At a position above the base end 2a of the drying conveyor 2, incineration material supplied from the wastewater treatment dehydrator 17 is supplied to a supply port 2c provided above the base end 2a of the drying conveyor 2.
A screw conveyor 18 is provided for supplying the screw conveyor. The drying conveyor 2 has a trough 20 as shown in FIG.
And a transport mechanism 21 housed in the trough 20. As shown in FIG. 4, the trough 20 has a lower part 20a in a semicircular shape, and an upper part 20b is composed of side walls 20c and 20c vertically erected from both ends of the diameter of the lower part 20a and a top plate 20d. . This upper part 20b
Is approximately 20f from the base end 20e of the trough 20 (FIG. 6).
(FIG. 7) It is formed up to the vicinity. And the top plate 20d
Are provided with a plurality of, for example, three openings 20g at predetermined intervals along the longitudinal direction, and each opening 20g is provided with a hatch. These openings 20g are holes for maintenance and inspection. The trough 20 has a cylindrical end 20f (FIG. 7), and is fitted and fixed in a hole 3b of a front wall 3a of the combustion furnace 3.

The transport mechanism 21 includes a large-diameter cylindrical body 22, a transport coil 23 spirally wound around the outer peripheral surface of the cylindrical body 22 at a predetermined pitch from a base end 22a to a distal end 22b, and welded. A base end is welded and fixed to a front end 22b of the cylindrical body 22, and the moving coil 24 (FIG. 7) has a free end at the front end. The cylindrical body 22 is set slightly longer than the entire length of the trough 20, and the transfer coil 23 is
The outer diameter is slightly smaller than the inner diameter of the semicircle of the lower part 20a of the trough 20. The outer diameter of the moving coil 24 is slightly larger than the outer diameter of the transfer coil 23 as shown in FIG.

The transport mechanism 21 has two ends of a cylindrical body 22 as shown in FIG.
And both ends 20e, 20f of the trough 20 as shown in FIG.
Are rotatably supported. Base end 2 of cylindrical body 22
2a protrudes outward from a hole formed in the base end 20e of the trough 20 as shown in FIG.
Has an outer peripheral surface in sliding contact with the inner surface of the lower portion 20a of the trough 20 over the entire length. The moving coil 24 is housed in the combustion furnace 3 as shown in FIG. 7 and is rotatably mounted on a combustion table 25 provided horizontally along the axial direction of the transfer mechanism 21. A sprocket 26 is externally fitted and fixed to the base end 22a of the cylindrical body 22.

As shown in FIG. 6, a distal end of a cylindrical body 27 slightly smaller in diameter than the cylindrical body 22 is fitted into the base end 22a of the cylindrical body 22 so as to be relatively rotatable.
A small-diameter cylindrical body 28 is arranged concentrically in the inside 7.
The cylindrical body 28 has a base end welded and fixed to the inner surface of the end plate 27 a of the cylindrical body 27, and a distal end extending concentrically and horizontally into the cylindrical body 22. An annular space 29 is formed between the cylindrical body 28 and the outer cylindrical bodies 27 and 22. A hole 27 is provided at the center of the end plate 27a of the cylindrical body 27.
b is drilled. The cylindrical body 27 is supported and fixed to the support base 15.

The drive mechanism 4 is mounted on the support 15. The drive mechanism 4 includes a drive motor 30 and a speed reducer 31 connected to the motor 30.
The sprocket 32 fixed to the rotation shaft of the speed reducer 31 and the sprocket 26 fixed to the base end 22 a of the cylindrical body 22 are connected by a chain 33. Then, the motor 30 rotates the transport mechanism 21 at a predetermined rotation speed.

The drying burner 5 is attached to an end plate 27a of the cylinder 27. The drying burner 5 is, for example, a gun type oil burner, and includes a main nozzle 5a and an auxiliary nozzle 5a.
b (FIG. 3), and each of the flame nozzles is a hole 27 in the end plate 27a.
b and are arranged side by side in the cylinder 28. The drying burner 5 can arbitrarily adjust the intensity of the flame injected from the main nozzle 5a and the auxiliary nozzle 5b. The drying burner 5 includes a hydraulic injection valve, is compactly integrated into one unit including a fan, a fuel pump, a controller, and the like, and uses fuel such as heavy oil.

As shown in FIG. 7, the combustion furnace 3 comprises a lower combustion chamber 35 and an upper combustion chamber 36. The combustion chambers 35 and 36 are connected to a communication passage 37 provided substantially at the center on the rear side.
Communication. Air passages 38 and 39 are provided at the lower end and the upper end of the lower combustion chamber 35 over the entire circumference, and these are communicated with each other. These air passages 38, 39
Is formed by a square pipe, and each ridge located in the lower combustion chamber and facing the moving coil 24 in the longitudinal direction, that is, each of the passages 38b, 38c and 39b, 39c along the transport direction of the moving coil 24, As shown in FIG. 8, a plurality of air blowing holes 38e, 38f, 39e, 39f are formed at appropriate intervals along the longitudinal direction.

The air passage 3 in the side wall 3c of the combustion furnace 3
An incineration blower 6 is provided at 8a. Also, the side wall 3c
Is provided with a hole 3d facing the upper open end of the communication passage 37, and the reburn burner 7 is mounted. The reburn burner 7 is a gun-type oil burner like the dry burner 5. As shown in FIG. 8, a large number of ventilation holes 25a are formed in the combustion table 25 that supports the moving coil 24. Further, a hopper 3 is provided below the combustion table 25.
9 are provided. The combustion furnace 3 is made of a refractory. Further, a plurality of monitoring windows (not shown) are provided on the side wall of the combustion furnace 3.

An afterburner 8 is provided at a position on the front side of a side wall 36a (FIG. 2) of the upper combustion chamber 36 so that the gas remaining in the upper combustion chamber 36 is completely burned. The side wall 36b of the upper combustion chamber 36 (FIG. 2)
An exhaust hole 36c (FIG. 7) is formed at the front side of the combustion furnace 3 and is connected to a cyclone 9 (FIGS. 1 and 2) installed outside the combustion furnace 3 via a duct 43 (FIG. 2). .

Returning to FIG. 1, FIG. 2 and FIG.
2 is interposed between the upper part of the trough 20 on the base end 20e side and the cylindrical body 27. That is, the dehumidifying blower 12 has one end formed in a hole 20h formed in a base end side of the upper portion 20b of the trough 20 and a slightly end side (downstream side) of the supply port 2c.
The other end is interposed in the middle of a pipe 40 connected to a hole 27 c formed in the side wall of the cylinder 27. The dehumidification blower 12 evaporates from the incinerated material in the trough 20 when the incinerated material is dried by the drying
A mixed gas consisting of water vapor, oil and fat, odor component and the like filled in the upper part 20b of the cylinder through the annular space 29 between the cylinders 27 and 28, into the cylindrical body 22, and forward of the flame of the drying burner 5. is there.

As shown in FIGS. 1, 2 and 7, the exhaust gas recirculation blower 13 is
3 is interposed. One end of a pipe 41 is communicatively connected to a hole 20i formed at the tip of a top plate 20d of the trough 20, and the other end of the pipe 41 is connected to the discharge port of an exhaust gas recirculation blower 13. One end of a pipe 42 is connected to the suction port, and the other end of the pipe 42 is connected in communication with a duct 43 in the middle. Blower 1
Reference numeral 3 denotes a high-temperature gas (hereinafter, referred to as “exhaust gas”) discharged from the upper combustion furnace 36 of the combustion furnace 3 to the cyclone 9 from the middle of the duct 43, refluxed into the trough 20, and conveyed by the drying conveyor 2. Direct heating of the incinerated material promotes drying.

As shown in FIG. 4, a scraping plate 50 is provided in the trough 20 for scraping off incinerated material adhered to the cylindrical body 21 of the drying conveyor 2. The scraping plate 50 has a distal end 50a bent into a substantially L shape and a proximal end 50a.
b is provided with a hole 50c, and the tip 50a is
2 comes into contact with the outer peripheral surface of the trough 2 by its own weight.
An L-shaped support member 51 fixed to the upper portion of the inner surface of the side wall 20c is rotatably supported through a hole 50c. The scraping plate 50 is disposed between the respective pitches of the transfer coil 23 provided on the cylindrical body 22 as shown in FIG. And these scraping plates 50 are
The upper portion near the bent portion of the distal end 50a is connected by a chain 52. One end of the chain 52 is fixed to the side wall of the trough 20, and the other end is a free end.

As shown in FIGS. 7 and 8, a shielding plate 55 is fixed in the middle of the moving coil 24. The shielding plate 55 has a disk shape and an outer diameter of the moving coil 24.
And a small hole 55a is formed at the center. The shield plate 55 is fixed at its outer periphery by a plurality of, for example, three rods 56 that connect adjacent coils in the middle of the moving coil 24, and is disposed at a right angle in the axial direction. The shielding plate 55 is a baffle plate for preventing a flame that vigorously blows through the inside of the cylindrical body 22 from the base end to the tip end, that is, into the combustion furnace 3. In addition, the shielding plate 55 has a function of guiding the flame upward and to the side. The small hole 558a at the center of the shielding plate 55 is a window for inspection.

As shown in FIG. 3, the base end side of the trough 20 and the vicinity of the suction port of the dehumidification blower 12, the vicinity of the hole 36c of the upper combustion chamber 36 of the combustion furnace 3, and the lower combustion chamber 35 and the upper combustion chamber 36 Temperature sensors 60, 61, 6
2 are provided. These temperature sensors 60-62,
The burners 7, 8 and the drying burner 5 are connected to a control circuit (not shown). This control circuit comprises burners 7, 8
In addition, control such as ignition and stop of the main nozzle 5a and the auxiliary nozzle 5b of the drying burner 5 is performed.

The operation will be described below. The incinerated material is, for example, dewatered sludge when wastewater treatment is performed in food processing, and a case where the sludge is dried and incinerated will be described.
Dewatered sludge (hereinafter referred to as "incinerated material") has an extremely large amount of water, and further contains a large amount of fats and oils and odorous components.
The incinerated material is conveyed from a wastewater treatment / dehydrator 17 (FIG. 1) by a screw conveyor 18 and supplied to a supply port 2c provided at a base end of the drying conveyor 2 of the drying / incineration apparatus 1.

On the other hand, the drying / incineration apparatus 1 is in a standby state to dry and incinerate the supplied incinerated material. That is, the main nozzle 5a and the auxiliary nozzle 5b of the drying burner 5 are ignited, and the drying conveyor 2, that is, the transport mechanism 21 (FIG. 3) housed in the trough 20 is heated to a high temperature.
The transport mechanism 21 is in a state where the incinerated material supplied by being rotationally driven by the drive mechanism 4 is dried and can be transported to the combustion furnace 3. At the same time, the dehumidification blower 12 is driven, so that the gas filling the upper part 20b of the trough 20 can be supplied to the base end 22a side in the cylindrical body 22 of the transport mechanism 21.

Further, the incineration blower 6 of the combustion furnace 3 is driven, air for combustion is supplied into the lower combustion chamber 35, and the incineration conveyed into the combustion furnace 3 by the conveyance mechanism 21 can be burned. . The reburn burner 7 is also ignited to enable combustion of the combustion components rising from the lower combustion chamber 35 to the upper combustion chamber 36 through the passage 37. Further, the exhaust gas recirculation blower 13 is driven, so that the exhaust gas in the upper combustion chamber 36 can be recirculated into the trough 20.

The incinerated material supplied to the supply port 2c of the drying conveyor 2 falls to the base end 22a of the cylindrical body 22 of the transport mechanism 21, as shown in FIG. The transport mechanism 21 is heated to a high temperature by the drying burner 5 and transports the incinerated material to the combustion furnace 3 as indicated by an arrow A while drying the incinerated material by indirect heating. When the incinerated material is conveyed while being heated to a high temperature, moisture, fats and odor components are evaporated, and the incinerated material is gradually dried. As a result, a large amount of steam, grease and odor components are generated from the incinerated material, and these steam, grease and odor components fill the upper portion 20 b of the trough 20. The amount of evaporation is determined on the loading side, that is, the base end 20 of the trough 20.
Significant on the e side.

Water (steam) filled in the trough 20,
Gas mixture consisting of oils and fats and odor components (evaporated gas)
Is supplied from the upper end 20b on the base end side of the trough 20 to the base end 22a side in the cylindrical body 22 by the dehumidification blower 12 and to the annular space 29 between the cylindrical bodies 22, 27 and the cylindrical body 28. . Then, the mixed gas is heated while spreading in the annular space 29 and is sent to the front of the flame of the drying burner 5. The inside of the cylindrical body 22 is extremely hot due to the flame of the drying burner 5.
Due to the flame, the moisture of the mixed gas becomes extremely high temperature steam, the fats and oils are almost completely burned, and the odor components are almost completely thermally decomposed. Then, these gases become a flame and blow out from the tip of the cylindrical body 22 into the combustion furnace 3 (arrow B in FIG. 6).

The mixed gas composed of a large amount of water vapor, oils and fats, odor components and the like generated in the trough 20 is discharged from the base end side of the trough 20 by the dehumidification blower 12 to the cylindrical body 22.
And is continuously removed. When the incinerated material is dried and conveyed, it is scraped off by the scraping plate 50 shown in FIGS. This stirs the incineration,
Drying is performed better. Further, it is possible to prevent the dried incinerated material from adhering to the cylindrical body 22 and solidifying.

As shown in FIG. 7, when the incinerated material is conveyed from the tip 22b of the cylindrical body 22 to the moving coil 24, the incinerated material is almost completely removed of moisture, grease and odor components, and is in a dried state. . The dried incineration is carried into the lower combustion chamber 35 of the combustion furnace 3 by the moving coil 24,
The air supplied from the incineration blower 6 on the combustion table 25 and the flame blown out from the tip 22b of the cylindrical body 22 of the transfer mechanism 21 substantially incinerate and burn.

By the way, the flame blasted vigorously into the combustion furnace 3 from the tip end 22b of the cylindrical body 22 collides with the shielding plate 55, and most of the flame is deflected upward and left and right sides. This prevents the burning material being burnt from being blown off or blown out. Further, the flame convects in the combustion furnace 3. As a result, the incinerated material transported into the combustion furnace 3 burns favorably. In addition, although a part of the flame blows through the small hole 55a for inspection in the center of the cylindrical body 22 of the shielding plate 55, there is no problem.

The remaining combustion components generated from the incinerated matter burned in the lower combustion chamber 35 pass through the communication passage 37 together with the high-temperature steam and gas discharged from the cylindrical body 22 and communicate with the upper combustion chamber 3.
Sent to 6. The reburn burner 7 reburns the remainder of the combustion components sent to the upper combustion chamber 36. The high-temperature exhaust gas discharged from the upper combustion chamber 36 is recirculated into the trough 20 by the exhaust recirculation blower 13 shown in FIG. The exhaust gas recirculated into the trough 20 directly heats and incinerates the incinerated material conveyed while being dried by the drying conveyor 2. Thereby, the drying of the incinerated material is further promoted and the incinerated material is dried well.

Since the drying of the incinerated material is promoted by the recirculation of the high-temperature exhaust gas into the trough 20, the drying burner 5 does not require a flame as much as the time of the start of incineration. Therefore, the control circuit stops the main nozzle 5a when the exhaust gas temperature becomes equal to or higher than the predetermined temperature, and sets only the auxiliary nozzle 5b. This enables economical operation. Further, the control circuit suppresses the rise of the temperature of the cylindrical body 22 and the dehumidifying blower 12 above the allowable temperature limit. Thereby, the durability of the device is improved.

The ash of the incineration burned in the lower combustion chamber 35 is stored in the ash box 46 (FIG. 1) through the discharge hole 3e from the tip of the combustion table 25 with the rotation of the moving coil 24. The sludge-like incineration material in which a large amount of water, oils and fats and odor components are mixed in this way is dried without exhausting offensive odors and completely incinerated. The ash of the incinerated material is easy to treat because the fats and oils and the odor are completely removed.

After the incineration of the incinerated material is completed, the drying conveyor 2, the dehumidification blower 12, the incineration blower 6, and the reburn burner 7 are stopped. However, even if the incineration ends, the trough 20
A mixed gas of water vapor, oil and fat, and odor components still remains inside. Therefore, the afterburner 8 and the exhaust gas recirculation blower 13 are operated while the auxiliary nozzle 5b is kept ignited to completely incinerate these residual components, in particular, oils and fats and odor components. After the incineration of the oils and fats and odor components remaining in the trough 20 is completed, the afterburner 8 and the exhaust gas recirculation blower 13 are stopped, and the incineration of the incinerated material is completed. Lastly, the exhaust blower 10 is driven, the residue in the upper combustion chamber 36 is taken into the cyclone 9, the gas component is exhausted from the chimney 11, and the ash is
It is stored in the ash box 45 (FIG. 1). As a result, the gas discharged from the chimney 11 hardly contains dust and odor components.

The pipe 4 to which the dehumidification blower 12 is connected
Although the position of the suction port (hole 20h) on the trough 20 side of the trough 20 is not particularly limited, in this embodiment, as shown in FIG. By being located, especially near the base end of the drying conveyor 2, that is, in the vicinity of the supply port 2c, a large amount of water vapor, grease, and odor components can be immediately removed and fed into the cylindrical body 22, and as a result, There is an advantage that the inside of the trough 20 can be maintained at a low humidity, and the incinerated material can be dried more favorably.

The position of the suction port of the exhaust gas recirculation blower 13 into the trough 20 is not particularly limited.
In order to promote drying by high-temperature exhaust gas, it is preferable to provide it at the front end side (combustion furnace 3 side) of the trough 20. That is, as described above, a large amount of water vapor and oil components generated from the incinerated material at the base end side of the drying conveyor 2 by the dehumidifying blower 12 are fed into the cylindrical body 22, and the dried drying conveyor 2 is dried.
Exposure of the incinerated material to a high-temperature exhaust gas on the tip side of the can accelerate the drying of the incinerated material.

Further, in this embodiment, a case where a gun type oil burner is used as the reburn burner 7 has been described. However, the present invention is not limited to this, and another type of burner may be used. In order to completely burn oils and fats and odorous components generated from the incineration,
The length of the cylindrical body 22, the flammable gas residence time (related to the capacity of the dehumidifying blower 12), the heat capacity of the drying burner 5, and the like may be appropriately changed.

In the above embodiment, a large amount of water, such as fish residue in fish processing, is incinerated.
The case of incineration of sludge mixed with oils and fats, odor components, etc. has been described. However, the present invention is not limited to this, and it is not limited to this. Of course, the present invention can also be applied to the incineration of livestock waste from poultry farms and pig farms, and wastes during processing of prepared foods.

[0042]

As described above, according to the present invention, mixed gas such as water vapor, oil and fat, and odor component generated when drying incinerated material is taken and supplied to the inside of the drying conveyor on the drying burner side. By doing so, the fats and oils can be completely burned inside the drying conveyor and the odor components can be thermally decomposed. As a result, these fats and oils and the odor components are removed, and the discharge to the outside is prevented. can do. In addition, since steam and oils and fats generated from the dried matter are removed from the trough, the inside of the trough becomes high temperature and low humidity, and the drying efficiency is improved. As a result, the dried material can be satisfactorily incinerated.

Further, by drying the high-temperature exhaust gas after incineration to the trough, drying of the combustion material can be promoted. Further, by promoting the drying by the high-temperature exhaust gas, the drying conveyor can be shortened, and the apparatus can be downsized. In addition, incinerated materials that generate oils and fats and foul odors when dried, especially sludge-like combustible incinerated materials containing a large amount of water, oils and fats, and odorous components, are used to process fishery processing residues and livestock waste. On the generation side, the oil and fat components and the odor components can be almost completely removed to perform the drying treatment and the incineration treatment, thereby preventing the surrounding environment from being adversely affected.

According to the second aspect, by controlling the intensity of the flame of the drying burner in accordance with the temperature of the vaporized gas, fuel can be saved and overheating of the drying conveyor is prevented. According to the third aspect, the flame that blows out from the drying conveyor side to the combustion furnace is blocked by the shielding plate near the leading end of the drying conveyor, and the scattering and blowing out of the incinerated material during combustion is prevented.

According to the fourth aspect of the present invention, the incinerated material adhering to the drying conveyor is scraped off well, conveyed to the combustion furnace, and solidified while remaining on the drying conveyor, or remains between the trough and the moving coil. Biting between them is prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a drying / incineration apparatus according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is an enlarged view of the vicinity of a drying burner in FIG. 3;

FIG. 7 is an enlarged view of the combustion furnace of FIG.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying / incineration apparatus 2 Drying conveyor 3 Combustion furnace 4 Drive mechanism 5 Drying burner 6 Incineration blower 7 Reburning burner 8 Afterburner 9 Cyclone 10 Exhaust blower 11 Chimney 12 Dehumidification blower 13 Exhaust recirculation blower 17 Wastewater treatment dehydrator 18 Screw conveyor 20 DESCRIPTION OF SYMBOLS 21 Conveying mechanism 22 Cylindrical body 23 Conveying coil 24 Moving coil 27, 28 Cylindrical body 35, 36 Combustion chamber 40-42 Pipe 43 Duct 50 Scraping plate 52 Chain 55 Shielding plate 60-62 Temperature sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23G 5/04 ZAB F23G 5/50 ZAB F23G 5/027 F23G 5/44

Claims (4)

(57) [Claims] An incinerator carried to the base end of the trough by a coil spirally provided from the base end to the end on the outer periphery of a cylindrical body rotatably housed in a trough while drying the incinerated material to the end. A drying conveyer, a drying burner disposed at a base end of the trough and injecting a flame into the cylindrical body to heat the cylindrical body; and a gas evaporating from the incinerated material near the flame in the cylindrical body. A dehumidifying means for feeding and dehumidifying, a combustion furnace disposed on the carry-out side of the drying conveyor, for burning the incinerated material conveyed, and an exhaust gas recirculation means for returning exhaust gas from the combustion furnace to the trough; A drying and incineration device characterized by comprising: 2. The drying and incineration apparatus according to claim 1, wherein the intensity of the flame of the drying burner is controlled in accordance with the temperature of the vaporized gas. 3. The drying and incineration apparatus according to claim 1, wherein the drying conveyer is provided with a shielding plate near a front end of the coil for suppressing a flame blowing from a cylindrical body into a combustion furnace. 4. The drying conveyor is provided with a scraping means for abutting each end on the outer peripheral surface of the cylindrical body between the respective pitches of the coil, and scraping off the incinerated material conveyed by the other end supported by the trough. The drying and incineration apparatus according to claim 1 or 3, wherein the drying and incineration apparatus is used.