JP2006234327A - Heat treatment device and method for waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat treatment device and a heat treatment method for wastes capable of approximately uniformly applying the heat to the wastes charged into a stirring tank to finish the wastes in a homogenous state. <P>SOLUTION: The stirring tank 2 having a required length comprises a treatment space portion 25 where the wastes are treated, a jacket portion 26 mounted at an outer side through a wall portion constituting the treatment space portion 25, a plurality of hot air inflow portions 270 formed in the longitudinal direction at required intervals for allowing the hot air to flow into the treatment space portion 25, and an air discharge portion 29 for discharging the hot air in the treatment space portion 25. The stirring tank 2 is constituted so that a large amount of hot air is supplied from the hot air inflow portion 270 formed at a place far from the air discharge portion 29 with respect to the hot air inflow portion 270 formed at a place near the air discharge portion 29, and the hot air is moved in the treatment space portion 25 to approximately uniformly apply the heat to the wastes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat treatment apparatus and a heat treatment method suitable for treatment of wastes (objects to be treated) such as garbage, manure, shochu waste liquid, and sludge. More specifically, the present invention relates to a product that is finished in a homogeneous state so that heat can be applied to the waste put into the stirring tank substantially uniformly.

  Wastes such as garbage, manure, shochu liquor, and sludge have a high moisture content and are difficult to process as they are. Accordingly, in recent years, these waste materials are often treated using a heat treatment apparatus that evaporates moisture.

  An example of such a heat treatment apparatus is disclosed in Japanese Patent Application Laid-Open No. 2002-18406. This heat treatment apparatus includes a sealed container having a stirring blade, and a heating space (heating space) to which hot air (hot air) is supplied is formed outside the sealed container so as to have a jacket structure. . Further, a hot air supply port (hot air supply port) for allowing warm air (hot air) supplied to the heating space to flow into the sealed container is formed on the inner surface side of the sealed container.

The above-described heat treatment apparatus can heat the waste in the sealed container indirectly by supplying warm air to the heating space and heating the wall surface of the sealed container. Is allowed to flow directly into the sealed container from the hot air supply port to heat the waste in the sealed container directly.
Japanese Patent Laid-Open No. 2002-18406

However, the above-described conventional heat treatment apparatus has the following problems.
The heat treatment apparatus is formed so that a heating space provided in the entire sealed container becomes one space, and a warm air supply pipe for supplying warm air is provided at one end side in the length direction of the sealed container. Further, a plurality of hot air supply ports for supplying hot air into the sealed container are formed side by side in the length direction of the sealed container. Therefore, the warm air supplied from the warm air supply pipe warms the warming space near the heating air blowing section, and then flows into the sealed container from the warm air supply port corresponding to the warming space. That is, the heat treatment apparatus cannot make the temperature distribution uniform in the entire heating space with the warm air, and cannot uniformly transmit the warm air to the entire area in the sealed container. Therefore, it is difficult to finish the input waste in a homogeneous state. The heat-treated waste is fermented or processed into compost or the like, but if the finish is not homogeneous, it will not be a compost of good quality.

  An object of the present invention is to provide a heat treatment apparatus for waste and a heat treatment method for waste so that the waste put into the agitation tank can be heated substantially uniformly and the waste is finished in a homogeneous state. Is to provide.

Means taken by the present invention to achieve the above object are as follows.
In the first invention,
Waste heat treatment equipment (S),
It is equipped with a stirring tank (2) having the required length,
The stirring tank (2)
A treatment space (25) where waste is treated;
Waste disposed in the processing space part (25) is indirectly provided by heating the wall part with hot air supplied by separating the wall part constituting the processing space part (25). The jacket part (26) to be heat-treated,
A hot air inflow portion (270) that is formed at a plurality of locations with a required interval in the length direction, and heat-treats waste directly by flowing hot air into the treatment space (25),
An exhaust part (29) for exhausting hot air in the processing space part (25);
With
The stirring tank (2)
A larger amount than the hot air inflow portion (270) formed at a location close to the exhaust portion (29) than the hot air inflow portion (270) formed at a location far from the exhaust portion (29). Hot air is supplied, and the hot air moves in the treatment space (25) so that the waste can be heated uniformly or substantially uniformly. And
This is a waste heat treatment device.

In the second invention,
The jacket part (26) is partitioned so as to have a plurality of partition parts (262) in the length direction of the stirring tank (2), and the hot air inflow part (270) corresponds to each partition part (262). The hot air supplied to the partition part (262) is formed so as to flow into the processing space part (25),
1 is a waste heat treatment apparatus according to a first invention;

In the third invention,
It is configured so that the flow rate of hot air flowing into the processing space (25) can be adjusted,
A waste heat treatment apparatus according to the first or second invention.

In the fourth invention,
A heat treatment method for waste,
Waste is introduced into the stirring tank (2) having a required length provided with an exhaust section (29) for exhausting hot air, and the distance from the exhaust section (29) is within the stirring tank (2). By supplying a large amount of hot air from a location far from the exhaust section (29) than the location near the hot air, the hot air moves inside the agitation tank (2) and is uniform in waste or The waste is treated so that heat is applied substantially uniformly.
This is a waste heat treatment method.

  The “heat treatment apparatus (heat treatment method)” shown in this specification can be stirred in a state in which bacteria necessary for composting are put in a container, and waste can be fermented into compost. In this case, the heat treatment apparatus can also be expressed as a composting apparatus (composting method) or a fermentation processing apparatus (fermentation processing method). Moreover, when drying a waste, it can also be expressed as a drying processing apparatus (drying method).

  The waste that can be treated by the heat treatment apparatus and the heat treatment method according to the present invention is not particularly limited, and examples thereof include raw garbage, manure, shochu waste liquid, seafood residue, and sludge.

The operation of the waste heat treatment apparatus according to the present invention will be described.
In the heat treatment apparatus (S), the waste introduced into the treatment space part (25) can be indirectly heat-treated by the hot air supplied to the jacket part (26) and directly by the hot air introduced from the hot air inflow part (270). Heat treatment.

  In the processing space (25) of the stirring tank (2), it is formed at a location far from the exhaust section (29) than the hot air inflow section (270) formed at a position close to the exhaust section (29). A large amount of hot air is supplied from the hot air inflow portion (270), and the hot air moves so as to be exhausted from the exhaust portion (29). Since waste is put into the treatment space (25), the hot air sequentially moves toward the exhaust (29) while giving heat to the waste (while exchanging heat and losing heat). In other words, the hot air flowing in from the hot air inflow portion (270) formed at a location far from the exhaust portion (29) has a large amount of heat loss, but the flow rate is also large, and the exhaust portion (29) is close to the distance. The hot air flowing in from the hot air inflow portion (270) formed at the location has a small amount of heat loss, but the flow rate is also reduced accordingly. As a result, the processing space (25) is in a state where the internal temperature is balanced as a whole.

  The jacket part (26) is partitioned so as to have a plurality of partition parts (262) in the length direction of the stirring tank (2), and the hot air inflow part (270) corresponds to each partition part (262). What is formed can supply hot air to each partition part (262), and can thereby be supplied to the whole jacket part (26). Moreover, the hot air supplied to each partition part (262) flows into the process space part (25) from the hot air inflow part (270) formed corresponding to each partition part (262).

  What is configured so that the flow rate of hot air flowing into the processing space (25) can be adjusted includes hot air flowing from the hot air inflow portion (270) formed at a location far from the exhaust portion (29). Even if the flow rate needs to be adjusted for the hot air flowing in from the hot air inflow portion (270) formed at a location close to the exhaust portion (29), the temperature inside the processing space portion (25) is adjusted. Can be balanced overall.

  Here, each constituent element of the present invention is given in correspondence with the reference numeral of each part shown in the embodiment described later, but this reference sign is only for helping understanding of the explanation, It does not mean that the requirements are limited to the above parts.

The present invention has the above-described configuration and has the following effects.
(A) According to the present invention, the temperature inside the agitation tank can be balanced as a whole, so it is possible to heat-treat the waste thrown into the interior at essentially the same temperature, Waste can be finished in a homogeneous state.

(B) The jacket portion is partitioned so as to have a plurality of partition portions in the length direction of the stirring tank, and the hot air inflow portion is formed corresponding to each partition portion. Thus, the entire jacket portion can be supplied. Moreover, the hot air supplied to each partition part flows in into a process space part from the hot air inflow part currently formed corresponding to each partition part.

(C) What is configured so that the flow rate of hot air flowing into the processing space portion can be adjusted is that the hot air flowing from the hot air inflow portion formed at a location far from the exhaust portion, With regard to the hot air flowing from the hot air inflow portion formed in the vicinity, even if the flow rate needs to be adjusted, the temperature inside the processing space portion can be adjusted to be in a balanced state as a whole.

Embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is an explanatory view showing an embodiment of a heat treatment apparatus according to the present invention, in which a stirring tank is longitudinally shown to show an internal structure.
FIG. 2 is an explanatory view showing the internal structure of the stirring tank of the heat treatment apparatus in cross section.
FIG. 3 is a plan view of the heat treatment apparatus according to the present invention.
FIG. 4 is a schematic perspective view showing the stirring tank.
FIG. 5 is a cross-sectional view taken along the line AA of the heat treatment apparatus shown in FIG.
FIG. 6 is an enlarged perspective view illustrating an inflow port through which hot air flows.

  Reference numeral S denotes a waste heat treatment apparatus. The heat treatment apparatus S includes a bone frame 1 formed by framed steel materials. In the inner part surrounded by the bone frame 1, a stirring tank 2 for treating waste, two motors 4 and 4 for rotating the rotating shaft 30 of the stirring apparatus 3, and a burner for sending hot air into the stirring tank 2 A device 5 is installed. The motors 4 and 4 and the burner device 5 are installed on one end side (right side in FIG. 1) of the stirring tank 2.

The stirring tank 2 will be described in detail.
The agitation tank 2 has side walls 20, 21, 22 and 23 and has a box shape with a required length including an upper wall 24 above. The upper wall 24 is formed with an opening slot 240 through which waste is introduced. The insertion port 240 is provided with a lid 241 that can be rotated and opened. Further, on the opposite side of the upper wall 24 from the side where the motors 4 and 4 and the burner device 5 are installed, there is an exhaust cylinder 29 which is an exhaust part for discharging hot air sent into the stirring tank 2 to the outside. It is provided in communication with the inside.

  A processing space portion 25 and a jacket portion 26 are formed inside the agitation tank 2. The processing space 25 for processing waste is formed by providing a partition wall 27, and the jacket portion 26 has a partition wall 28 so as to have a jacket structure on the outside across the side and bottom of the processing space 25. It is provided and formed. Among these, the partition wall 28 is provided so as to have an inclination angle slightly rising from the side on which the burner device 5 is installed to the side of the exhaust tube 29, and the exhaust tube 29 side is closer to the jacket portion 26 than the burner device 5 side. The internal volume is made small. As will be described later, this is to make it difficult for the flow velocity of the hot air blown to the exhaust tube 29 side of the jacket portion 26 to decrease. The partition walls 27 and 28 are formed by processing a metal plate having thermal conductivity.

  In the jacket portion 26, partition portions 262... Are formed by providing a plurality of partition walls 261... At equal intervals in the length direction of the stirring tank 2. In the stirring tank 2 shown in the present embodiment, the partition portions 262 are formed at six locations, but the number of partition walls is not particularly limited.

  Further, a hot air duct 260 that is a pipe line is provided over substantially the entire length in the length direction of the agitation tank 2 through the partition wall 261 at a substantially central portion in the jacket portion 26. The hot air duct 260 is formed in a rectangular tube having a slope (taper) at the bottom and tapering down the inner volume as it approaches the exhaust tube 29 side. Further, the hot air duct 260 has one end passing through the side wall 20 and connected to the burner device 5, whereby hot air can be sent to the inside.

  The hot air duct 260 is formed with air outlets 263 that are opened at positions corresponding to the respective partition portions 262, and hot air can be sent to the respective partition portions 262. Each of the air outlets 263 has a different opening area, and the one formed on the burner device 5 side is large, and is formed so as to gradually become smaller toward the exhaust tube 29 side.

  A portion of the partition wall 27 that constitutes the side of the processing space 25 is formed with an open hot air inlet 270 that is a hot air inflow portion so as to correspond to each partition 262. Each hot air inlet 270 is formed to have substantially the same opening area. Accordingly, the hot air that has passed through the partition 262 is sent into the processing space 25 from the hot air inlet 270.

Please refer to FIG.
In the upper part of the hot air inlet 270, a slit 271 having a narrow groove shape having a length substantially the same as the lateral width of the hot air inlet 270 is formed so as to penetrate therethrough. In addition, guide rails 272 for providing a plate-like closing plate 273 are provided at locations corresponding to the upper side of the slit 271 and the lower portion of the hot air inlet 270 in the partition part 262, respectively. The closing plate 273 includes a plate body 274 having substantially the same size as the hot air inlet 270, and has a structure in which an operation piece 275 projects forward from the upper edge portion.

  The closing plate 273 is configured such that the operation piece 275 is passed through the slit 271 from the inside of the partition portion 262 and the plate body 274 is attached to the guide rail 272 so as to be slidable in the lateral direction. The closing plate 273 is slid to change the opening size of the hot air inlet 270 to adjust the flow rate of hot air sent into the processing space 25.

  A frame member 276 having a required width is attached to the hot air inlet 270 on the processing space 25 side so as to surround the hot air inlet 270. Inside the frame member 276, there are a mesh body 277 that prevents waste from entering the jacket portion 26 from the hot air inlet 270 and a collision grid 278 that prevents the waste from colliding with the mesh body 277 during processing. Is provided. The collision grid 278 is provided with a plurality of equilateral angle irons arranged in the longitudinal direction with a required interval.

  A wind direction adjusting member 279 that changes the blowing direction of hot air is provided above and to the side of the frame member 276. The wind direction adjusting member 279 is fixed to the side of the frame member 276 and the movable member 279b provided to be rotatable in the vertical direction by a hinge T with respect to the fixed member 279a provided above the frame member 276. A side wall member 279c is provided. A female screw part 279d into which a bolt part can be screwed is fixedly provided on the tip part side of one end side of the movable member 279b. In addition, an elongated hole 279e into which the above-described bolt portion can be inserted is formed in an arc shape on the upper side of the side wall member 279c. The movable member 279b can be fixed at a required angle by tightening the bolt portion of the fixing screw 279f provided with the operation portion through the elongated hole 279e from the outside of the side wall member 279c and screwing into the female screw portion 279d.

  Inside the treatment space 25, a stirring device 3 for stirring waste is provided. The stirring device 3 includes two rotating shafts 30 and 30 extending in the length direction of the stirring tank 2 in a substantially parallel state with a required interval in the width direction. Each rotating shaft 30 is rotatably supported on a bearing 200 provided at one end side on the outer surface of the side wall 20, and the other end side is connected to the rotating shaft of the motor 4. A plurality of stirring blades 31... Are fixed on the circumferential surface of each rotating shaft 30 in the radial direction with a required interval. The bottom side of the partition wall 27 that partitions the processing space portion 25 and the jacket portion 26 is formed in a substantially semicircular cross section that follows the outer edge shape when the stirring blade 31 rotates.

  Since the motor 4 and the burner device 5 described above are those known in the art, a detailed description thereof will be omitted.

(Work)
With reference to FIG. 1 thru | or FIG. 6, the effect | action of the heat processing apparatus S shown by this Embodiment is demonstrated.
In the heat treatment apparatus S, wastes that are to be treated such as garbage, manure, shochu waste liquid, marine product residues, and sludge are processed. The waste is thrown into the processing space 25 from the inlet 240 by opening the lid 241 provided on the upper wall 24. After throwing in the waste, the lid 241 is closed and the agitation tank 2 is closed.

  The burner device 5 is ignited to send hot air to the hot air duct 260 in the stirring tank 2. At the same time, the motors 4 and 4 are moved to operate the stirring device 3. The motors 4 and 4 are configured so that the rotary shafts 30 and 30 of the stirring device 3 rotate alternately inward and outward. Thereby, the waste thrown into the processing space 25 is stirred by the stirring blade 31 of the stirring device 3.

  The hot air is in a state of being filled over the entire length of the hot air duct 260 and is blown out from each outlet 263 and sent into the jacket portion 26 (each partition portion 262). The flow rate of hot air blown out from each outlet 263 is such that the hot air duct 260 is tapered and has a required length, and the opening area of the outlet 263 is larger on the burner device 5 side and approaches the exhaust tube 29 side. Since it is formed to be gradually smaller, there are more burner devices 5 side, and it gradually decreases as it approaches the exhaust tube 29 side.

  Hot air blown out from each outlet 263 fills the jacket portion 26 (each partition portion 262) and heats the partition wall 27. When the partition wall 27 is heated, heat is also transmitted to the processing space 25, and the waste thrown into the processing space 25 is indirectly heat-treated. It should be noted that means such as fins may be provided on the side of the jacket portion 26 of the partition wall 27 in order to enhance the heat transfer performance of hot air.

  The hot air sent to each partition part 262 flows into the processing space part 25 from each hot air inlet 270 formed on the upper side of the partition wall 27. The jacket portion 26 is configured such that the inner volume is smaller on the exhaust tube 29 side than on the burner device 5 side, so that the flow velocity is less likely to decrease even on the partition portion 262 on the exhaust tube 29 side.

  The hot air is blown out by the wind direction adjusting member 279 provided at the upper part of the hot air inlet 270 so as to directly hit the waste that is being stirred. Further, since the blown hot air passes through the gaps between the collision grids 278 provided in a plurality, the turbulent state is generated in the processing space 25 and the heat is easily transferred to the waste surface. The waste is stirred by the stirring device 3 and directly heat-treated while taking in the hot air in the state as described above.

  The flow rate of the hot air flowing in from the hot air inlet 270 is different for each partitioning part 262, and is increased on the burner device 5 side and gradually decreases as it approaches the exhaust tube 29 side. The flow rate of the hot air is largely determined in advance by the hot air duct 260 and the outlet 263, but can be finely adjusted by sliding the closing plate 273 and changing the size of the opening of the hot air inlet 270. The closing plate 273 is slid by holding the operation piece 275 and moving it along the slit 271.

  The hot air that has flowed into the processing space 25 is exhausted to the outside of the agitation tank 2 through the exhaust tube 29. Therefore, the hot air moves in the processing space 25 so as to gather on the exhaust tube 29 side. Since waste is put into the processing space 25, the hot air sequentially moves toward the exhaust tube 29 while giving heat to the waste (while exchanging heat and losing heat). The hot air flowing into the burner device 5 side has a longer moving distance than that flowing into the exhaust tube 29 side, and therefore the amount of heat loss is also large.

  In the heat treatment apparatus S, the flow rate of hot air flowing in from the hot air inlet 270 is different for each corresponding to each partition part 262, and the burner apparatus 5 side is large and gradually decreases as it approaches the exhaust tube 29 side. . Therefore, although the hot air flowing into the burner device 5 side has a large amount of heat loss, the flow amount is also large, and the hot air flowing into the exhaust tube 29 side has a small amount of heat loss, but the flow amount is also small. Thus, the processing space 25 is in a state where the internal temperature is balanced as a whole. Therefore, the heat treatment apparatus S can heat-treat at essentially the same temperature in the treatment space 25 and can finish the waste in a homogeneous state.

  In the present embodiment, the heat treatment apparatus S is shown in which the exhaust pipe 29 is installed on the opposite side of the burner apparatus 5, but the positional relationship between the exhaust pipe (exhaust section) and the burner apparatus is not limited. A large amount of hot air is supplied from the hot air inflow portion formed at a location far from the exhaust portion from the hot air inflow portion formed at a location close to the exhaust portion in the stirring tank. If it exists, the exhaust pipe can be provided near the burner device, for example, or can be provided around the middle part of the stirring tank.

  The terms and expressions used in this specification are merely explanatory and are not limiting at all, and exclude terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to do. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

Explanatory drawing which shows one Embodiment of the heat processing apparatus which concerns on this invention. Explanatory drawing which shows a cross section of the stirring tank of a heat processing apparatus, and shows an internal structure. The top view of the heat processing apparatus which concerns on this invention. The schematic perspective view explanatory drawing which shows a stirring tank. AA sectional drawing of the heat processing apparatus shown in FIG. The perspective explanatory view which expands and shows the inflow port into which hot air flows.

Explanation of symbols

S Heat treatment apparatus 1 Bone frame 2 Stirrer tank 20, 21, 22, 23 Side wall 200 Bearing 24 Upper wall 240 Input port 241 Cover body 25 Processing space portion 26 Jacket portion 260 Hot air duct 261 Partition wall 262 Partition portion 263 Air outlet 27 Partition wall 270 Inlet 271 Slit 272 Guide rail 273 Blocking plate 274 Plate body 275 Operation piece 276 Frame member 277 Mesh body 278 Collision lattice 279 Airflow direction adjusting member 28 Partition wall 29 Exhaust tube 3 Stirrer 30 Rotating shaft 31 Stirring blade 4 Motor 5 Burner device

Claims (4)

Waste heat treatment equipment (S),
It is equipped with a stirring tank (2) having the required length,
The stirring tank (2)
A treatment space (25) where waste is treated;
Waste disposed in the processing space part (25) is indirectly provided by heating the wall part with hot air supplied by separating the wall part constituting the processing space part (25). The jacket part (26) to be heat-treated,
A hot air inflow portion (270) that is formed at a plurality of locations with a required interval in the length direction, and heat-treats waste directly by flowing hot air into the treatment space (25),
An exhaust part (29) for exhausting hot air in the processing space part (25);
With
The stirring tank (2)
A larger amount than the hot air inflow portion (270) formed at a location close to the exhaust portion (29) than the hot air inflow portion (270) formed at a location far from the exhaust portion (29). Hot air is supplied, and the hot air moves in the treatment space (25) so that the waste can be heated uniformly or substantially uniformly. And
Waste heat treatment equipment. The jacket part (26) is partitioned so as to have a plurality of partition parts (262) in the length direction of the stirring tank (2), and the hot air inflow part (270) corresponds to each partition part (262). The hot air supplied to the partition part (262) is formed so as to flow into the processing space part (25),
The waste heat treatment apparatus according to claim 1. It is configured so that the flow rate of hot air flowing into the processing space (25) can be adjusted,
The waste heat treatment apparatus according to claim 1 or 2. A heat treatment method for waste,
Waste is introduced into the stirring tank (2) having a required length provided with an exhaust section (29) for exhausting hot air, and the distance from the exhaust section (29) is within the stirring tank (2). By supplying a large amount of hot air from a location far from the exhaust section (29) than the location near the hot air, the hot air moves inside the agitation tank (2) and is uniform in waste or The waste is treated so that heat is applied substantially uniformly,
Waste heat treatment method.

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