JP2015160767A - Waste treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste treatment apparatus that is low cost, has an excellent appearance, is less affected by the outside environment, and can stably treat waste.SOLUTION: A waste treatment apparatus 1 includes: a vertical cylindrical container 2 in which stirring blades or the like are provided; and an apparatus external wall 9 which has a square cylindrical shape and almost touches the cylindrical outer surface of the container 2. The apparatus external wall 9 consists of a combination of external heat insulation panels 9a-9d which are disposed across a space so as to cover the cylindrical outer surface of the container 2. Heat exchange means, which heats the outside air introduced into the container 2 using the heat of the exhaust gas, is disposed in four surplus spaces (A-D) of the corner parts of the square cylindrical external wall.

Description

  The present invention relates to a waste treatment apparatus (sealed fermentation drying apparatus) for treating organic waste such as livestock excrement and food residues.

  Organic waste such as livestock excreta discharged from livestock management bodies and food residues discharged from food industry establishments has increased in recent years, and their disposal has become a major social issue. ing. When these wastes are incinerated, the cost is high and there is a problem of dioxin generation. In addition, when landfilling is performed, there are problems of securing an exhaust location and odor damage. In addition, in recent years, the promotion of the reuse of organic waste has been demanded by legislation such as the Food Recycling Law. In view of these points, organic waste is composted and recycled as a recycling resource. Even when composting, organic wastes such as food residues have a high water content, so if they are not sufficiently dried and fermented, they may have a large volume and weight and may be spoiled.

  For this reason, in recent years, organic waste has been dried and composted using a closed fermentation drying apparatus (also referred to as “component”) that utilizes the fermentation action of microorganisms. This component is a composting apparatus having a sealed vertical structure in which input waste does not easily come into contact with outside air.

  For example, as a fermentation treatment apparatus for food residues, food residues and aerobic microorganisms are mixed in an airtight vertical container, and the food residues are fermented by the action of aerobic microorganisms while agitating the inside of the container. An apparatus has been proposed (see Patent Document 1). In this fermentation treatment apparatus, a plurality of upper and lower stirrer blades are radially extended around a rotating shaft standing in a vertical container, and a plurality of vent holes are drilled below the lowermost stirrer blade. The air is vented into the container through the vent. Here, the vertical container is a three-layered heat insulating container having a heat insulating layer between an inner layer and an outer layer. In addition, incidental devices such as an exhaust blower and a blower are installed outside the apparatus.

JP 2010-69477 A

  However, since the waste disposal apparatus (component) like patent document 1 is installed and used outdoors, it is easy to receive the influence of external environments, such as the weather, and cannot perform the stable process even when using a heat insulation container. There is a fear. In addition, the component has a simple cylindrical vertical tank shape because of its internal structure using a stirring blade, and no particular consideration is given to its appearance design.

  In addition, for users such as livestock farmers, the treatment of organic waste such as livestock excrement is treatment of unnecessary matter (dust), and the waste treatment equipment can provide initial costs at the time of introduction and running costs during operation. It is desirable to reduce as much as possible. As ancillary equipment of the device, there are a hydraulic unit, a blower, an exhaust blower, a deodorizing device, etc., but these are separated from the vertical container and it is very troublesome to install at the installation site. (Initial cost) will increase. Furthermore, the destabilization of the heat insulation surface requires continuous operation of a separate air heater and leads to an increase in running cost.

  The present invention has been made to cope with such problems, and an object thereof is to provide a waste treatment apparatus that is low in cost, excellent in appearance, less affected by the external environment, and capable of stable treatment. .

  The waste treatment apparatus of the present invention includes an airtight cylindrical vertical container, a rotary shaft provided in the vertical direction in the container, a plurality of stirring blades fixed around the rotary shaft, and the container An air supply means for sending outside air into the container and an exhaust means for discharging the inside air accumulated in the container to the outside of the container. The waste treatment apparatus is configured to remove organic waste introduced from the upper part of the container into the container while being stirred with the stirring blade, fermented and dried, composted, and taken out from the lower part of the container. And an external heat insulating panel installed so as to cover at least a part of the outer periphery of the cylinder of the container via a space.

  The waste treatment apparatus has heat exchange means for heating the outside air introduced from the air supply means into the container by heat of the exhaust from the exhaust means, and the cylindrical outer periphery of the container, the external heat insulation panel, The heat exchange means is installed in the space between the two.

  The outer wall of the apparatus constituted by the external heat insulating panel has a rectangular tube shape that substantially circumscribes the outer periphery of the cylinder of the container, and the heat exchange means is formed between the outer wall of the apparatus and the outer periphery of the cylinder of the container. An exhaust passage that is installed in the space of the corner of the rectangular tube and through which the exhaust discharged from the container passes, and an air that passes outside air before introduction into the container that is installed through the exhaust passage. It is comprised from piping.

  The air supply means and the exhaust means are accommodated in the apparatus.

  The waste treatment apparatus of the present invention includes an airtight cylindrical vertical container, a rotary shaft provided in the vertical direction in the container, a plurality of stirring blades fixed around the rotary shaft, and the container An air supply means for sending outside air into the inside and an exhaust means for discharging the inside air accumulated in the container to the outside of the container. The outside air is introduced into the container by the air supply means, and the exhaust means An apparatus for discharging organic waste introduced from the upper part of the container into the container with stirring blades while fermenting and drying, composting and taking out from the lower part of the container. Since it has an external heat insulation panel installed so as to cover at least partly through a space, it has a high heat insulation effect due to the air layer of the space, and the apparatus installed outdoors has little influence of the external environment and stable processing. It becomes possible. Moreover, since it can be made into shapes other than simple cylindrical vertical shape by the combination of an external heat insulation panel, it is excellent also in an external appearance.

  The waste treatment apparatus has a heat exchange means for heating the outside air introduced into the container from the air supply means by the heat of the exhaust from the exhaust means, and a space between the cylindrical outer periphery of the container and the external heat insulation panel Since the heat exchanging means is installed, the fermentation heat of the processed product can be effectively used while using the surplus space, and a separate air heater is not required, and the running cost can be reduced.

  The outer wall of the device constituted by the external heat insulating panel is a square tube that is substantially circumscribed on the outer periphery of the container, and the heat exchange means is a rectangular tube formed between the outer wall of the device and the outer periphery of the container. An exhaust passage portion that is installed in the corner space and through which the exhaust discharged from the container passes, and a ventilation pipe through which the outside air before introduction passes through the container that is installed through the exhaust passage portion. Therefore, while reducing the surplus space and reducing the size of the entire apparatus, the surplus space can be effectively used to reduce the running cost as described above.

  Since the air supply means and the exhaust means are accommodated inside the apparatus, the entire apparatus can be made compact. Moreover, the construction period and construction cost (initial cost) at the time of enforcement can be reduced compared with the case where these are incorporated separately at the installation site.

It is the perspective view and top view which show the external appearance of the waste disposal apparatus of this invention. It is a longitudinal cross-sectional view of the waste disposal apparatus of FIG. It is a figure explaining an exhaust route and a ventilation route. It is sectional drawing of the stirring blade in FIG.

  An example of the waste treatment apparatus of the present invention will be described with reference to FIGS. Fig.1 (a) is a perspective view which shows the external appearance of a waste disposal apparatus, and FIG.1 (b) is the top view. As shown in FIGS. 1 (a) and 1 (b), a waste treatment apparatus 1 includes a cylindrical vertical container 2 provided with a stirring blade therein, and a rectangular cylindrical shape that is substantially circumscribed on the outer periphery of the cylinder of the container 2. A closed-type fermentation drying apparatus (component) having an apparatus outer wall 9. The container 2 that is a fermenter is a heat-insulating container that itself has a metal outer layer and a heat-insulating layer, and is an air-tight container that is unlikely to come into contact with outside air other than that introduced from the vent holes. The apparatus outer wall 9 is configured by combining external heat insulating panels 9a to 9d that are installed so as to cover the cylindrical outer periphery of the container 2 with a space therebetween. A machine room 5 is integrally provided below the container 2 covered with the apparatus outer wall 9. The overall appearance of the device is a substantially quadrangular prism shape. Heat insulation is achieved by the air layer in the space between the container 2 and the external heat insulation panels 9a to 9d, and the double heat insulation structure with the (heat insulation) container 2 is stable and less affected by the external environment in the apparatus installed outdoors. Processing is possible.

The external heat insulating panels 9a to 9d may be constituted by small units of panels that can be further disassembled. Since the waste disposal apparatus of the present invention is a large-sized apparatus for business use in which the internal volume of the container 2 is about 15 to 45 m ³ , the external heat insulating panel also has a very large size (longitudinal direction 3 m or more). Construction from a smaller unit panel enables construction with a small number of people. In addition, if the bolts are used to connect the panels, there is a possibility that the holes do not fit due to manufacturing errors. For this reason, it is preferable not to use a bolt etc., but to provide a concavo-convex shape that fits between adjacent panels, and to implement these by fitting them. By adopting the fitting with the uneven shape, it is possible to prevent the deviation at the time of enforcement, and to suppress the deterioration of the heat insulation performance.

  The internal structure of the waste disposal apparatus of FIG. 1 will be described with reference to FIG. FIG. 2 is a longitudinal sectional view of the waste treatment apparatus of FIG. As shown in FIG. 2, the waste treatment apparatus 1 includes a cylindrical vertical container 2, a rotary shaft 3 provided in the vertical direction in the container 2, and a plurality of agitation fixed around the rotary shaft 3. The blade 4 is provided with a blower 6 that is an air supply means into the container 2 and an exhaust blower 7 that is an exhaust means to the outside of the container 2. The lower part of the lowermost stirring blade has a vent hole 4d, and the outside air sent from the blower blower 6 passes through the blower pipe (see FIG. 3) in the apparatus and the introduction pipe 10 provided in the rotary shaft, It is introduced into the container through the vent hole. The container 2 has an organic waste inlet 2a and a gas outlet 2c, and a compost (organic waste after treatment) outlet 2b at the bottom. The inlet 2a and the outlet 2b are provided with an openable / closable lid for ensuring the airtightness of the container. In the machine room 5, a hydraulic unit 8 that is a driving unit of the rotary shaft 3, the above-described blower 6 and exhaust blower 7 are provided. The rotary shaft 3 penetrates into the machine chamber 5 and is rotated at a predetermined rotational speed by the hydraulic unit 8. Since the hydraulic unit 8, the blower 6 and the exhaust blower 7 are housed and integrated in the apparatus, the construction period and construction cost (initial cost) at the time of enforcement can be reduced.

  In the waste treatment apparatus of the present invention, the organic waste to be treated (hereinafter also simply referred to as “waste” or “treated product”) includes livestock excrement, food waste, septic tank sludge containing a large amount of organic components. Or mixtures thereof. Specifically, livestock excretion includes chicken excrement, pig excrement, cattle excrement, horse excrement, etc., food waste includes garbage, food production by-products, etc. Examples include sludge extracted from sludge septic tanks. In addition, composting of waste is performed by aerobic fermentation in a container while aeration is performed by blowing air in the presence of aerobic fermentation bacteria. As the aerobic fermenting bacteria, fermenting bacteria that are activated at about 30 to 90 ° C. are preferable, and examples thereof include Diovatisul and Bacillus.

  In this apparatus, the processed product is input into the container 2 from the input port 2a, and the processed product is taken out from the outlet 2b at the bottom of the container after fermentation and composting in the container. Fermentation and composting are performed by rotating each stirring blade 4 at a low speed while introducing outside air from the vent holes 4d of the lowermost stirring blade, aeration and stirring the processed material, and aerobic fermentation. Moreover, it is also dried simultaneously by ventilation. The outside air introduced into the container from the vent hole 4d of the lowermost stirring blade flows upward while passing through the processed material, and is exhausted from the exhaust port 2c together with gas and water vapor generated from the processed material (see FIG. 3). Sent to.

  As shown in FIG. 1B, in this embodiment, the apparatus outer wall 9 is formed in a rectangular tube shape that substantially circumscribes the cylindrical outer periphery of the container 2, and thus is formed between the apparatus outer wall 9 and the cylindrical outer periphery of the container 2. The four spaces (A to D) at the corners of the rectangular tube shape become surplus spaces having a certain size. In order to make effective use of this surplus space, it is preferable to provide heat exchange means for heating the outside air introduced into the container by the blower blower 6 using the heat of the exhaust gas sent by the exhaust blower 7.

  The exhaust path from the exhaust port using the exhaust blower, the blow path using the blower blower, and the heat exchanging means will be described with reference to FIGS. 1B and 3A to 3D. FIG. 3 shows a ventilation / exhaust path in the apparatus of FIG. 1 in front (FIG. 3A), right side (FIG. 3B), back (FIG. 3C), left side (FIG. 3D). It is the schematic diagram seen from)). In the figure, a solid line arrow is a flow of air blown into the container (outside air before being introduced into the container), and a two-dot chain line arrow is a flow of exhaust discharged from the container. The blower blower 6 is installed in the middle of the blower piping path, and the exhaust blower 7 is installed in the middle of the exhaust pipe path including the exhaust passage part. By the operation of the blower blower 6, outside air is introduced from the outside air inlet 11 into the blower pipe 6a, and the outside air is continuously sent through the blower pipe 6a. Further, by the operation of the exhaust blower 7, exhaust is introduced into the exhaust pipe 7a from the exhaust port 2c, and the exhaust is continuously sent through the exhaust pipe 7a. In the middle of the exhaust pipe 7a, there is an exhaust passage portion 7b through which exhaust passes and is filled. The blower pipe 6a is installed through the exhaust passage portion 7b. Further, the blower pipe 6a is partially folded in the vertical vertical direction so that it can pass through the exhaust passage portion 7b as long as possible. A ventilation fan 12 is installed at the end of the path of the exhaust pipe 7 a to assist the exhaust by the exhaust blower 7. The exhaust pipe and the blower pipe are connected so as to sequentially pass through the spaces at the four corners. Since the exhaust is heated by a fermentation reaction, the exhaust is at a higher temperature (60 ° C. or higher) than the outside air. By passing the ventilation pipe 6a through the exhaust passage 7b, the heat of the exhaust is given to the outside air in the ventilation pipe (heat exchange), and the outside air (air blowing) can be heated to a temperature suitable for the fermentation reaction. . The external heat insulation panel can prevent the heat of the exhaust in the exhaust passage from escaping to the outside of the apparatus. The heat exchange means having such a structure makes it possible to eliminate the need for a heater for heating and blowing air while effectively utilizing the surplus space formed by providing the external heat insulating panel, and can greatly reduce the running cost.

  Further, in this surplus space, deodorizing means such as a water washing deodorizing device and a chip (pumice) deodorizing tank can be installed in the exhaust path. By providing such deodorizing means, it is possible to reduce the malodor of the exhaust gas while effectively using the surplus space as in the heat exchange means.

  The shape of the stirring blade 4 in FIG. 2 will be described. A predetermined number of stirring blades 4 are provided in each stage at a plurality of positions spaced apart from each other by a predetermined interval from the lower part to the upper part of the rotating shaft 3 in the container. In the form shown in FIG. 2, the number of stages is five, and the number of stirring blades is three in the first stage from the bottom (one is not shown), two in the second stage, and one in the third stage. A total of 9 sheets are provided, one on the fourth level and two on the fifth level. The number of stages of the stirring blades 4 is not limited to the example shown in FIG. 2 and is preferably provided at a position of at least three stages. In FIG. 2, the first stage from the bottom is classified as “lower stage”, the second and third stages are classified as “middle stage”, and the fourth and fifth stages are classified as “upper stage”. Here, when the number of stages is three or more and an arbitrary number of stages, the uppermost stage is always classified as “upper stage”, and the lowermost stage is always classified as “lower stage”. With respect to other than the uppermost and lowermost stages, at least one stage is set as “middle stage”, and the rest is classified into “upper stage”, “middle stage”, and “lower stage” according to the position. The “upper stage” is in an area above the vertical center position of the container 2, and the “lower stage” is in an area below the vertical center position of the container 2.

  Further, the number of stirring blades in each stage is not limited to the example shown in FIG. 2, and at least one stirring blade may be provided. About the lowermost stirring blade (with a vent hole), it is preferable that three or more blades are provided at equal intervals in the circumferential direction in order to uniformly and sufficiently blow the air to the whole. Note that the load applied to the stirring blade increases from the upper stage to the lower stage, and in each stirring blade, the load applied to the part closer to the main shaft decreases.

  As will be described later, the waste (processed material) is not filled in the container 2 and is charged with a space of about 10 to 20%. The stirring blade 4 is disposed in a range from the bottom of the container 2 to the height H of the processed object, and the position of the uppermost stirring blade is positioned at the substantially uppermost part of the processed object. The position of the lowermost stirring blade is preferably slightly above the bottom of the container 2 and a gap is preferably provided between the bottom. In addition, the distance between each stage can be arbitrarily determined according to the number of stages with reference to the uppermost stage and the lowermost stage. The upper stage (particularly, the uppermost stage) of the stirring blade is used to promote fermentation by flattening the treated product and increasing the contact area with the outside air (those introduced from the stirring blade). The middle stage is used to actively agitate the processed product whose temperature has been increased by fermentation heat in the upper stage. The lower stage (particularly the lowermost stage) is mainly used for blowing air entirely because the stirring is completed in the upper stage and the middle stage.

  All the stirring blades 4 have a pitched paddle shape linearly extending from the rotary shaft 3 toward the inner wall side of the container 2 and have an inclined surface on the front side in the rotation direction. The inclined surfaces of the stirring blades 4 are planes inclined at an inclination angle of less than 90 degrees (acute angle) with respect to the rotation surface (horizontal plane) of the stirring blades. That is, the angle formed between the rear direction in the rotation direction and the upper direction of the inclined surface is less than 90 degrees. As the agitating blade rotates, the processed material is agitated in such a manner as to run along the inclined surface.

  The shape of the stirring blade will be described in detail with reference to FIG. 4 is a cross-sectional view in the direction of the rotation axis of the stirring blade at each stage in FIG. As shown in FIG. 4, each stirring blade 4 is joined to the bottom plate 4b parallel (horizontal) to the rotation surface of the stirring blade, the swash plate 4a joined to the bottom plate 4b, and the bottom plate 4b and the swash plate 4a. And a bent plate 4c having an L-shaped cross section. The outer surface (plane) of the swash plate 4a is “an inclined surface of the stirring blade”, and the swash plate 4a is joined to the front side in the rotational direction of the bottom plate 4b. In addition, as long as the shape of the stirring blade has the above-described inclined surface, the other specific structure is not particularly limited to the shape shown in FIG. However, the above-described outside air introduction path is required for the lowermost stirring blade.

In the waste treatment apparatus of the present invention, the inclination angle θ ₁ of the inclined surface of the uppermost stirring blade 4 in the upper stage is preferably 60 degrees to 85 degrees, more preferably 60 degrees to 70 degrees, and 62 to 67 degrees. Further preferred. The inclination angle θ ₃ of the inclined surface of the lower (including the lowermost) stirring blade 4 is preferably 15 degrees to 25 degrees, and more preferably 18 degrees to 22 degrees. About the upper stage (especially uppermost stage), it becomes easy to extend a processed material flatly by making an inclination angle high like the said range, and can increase the contact area with external air. Moreover, since it is an upper part of a processed material, stirring resistance is small and a load is hard to become large even at a high inclination angle. On the other hand, the lower stage has a large stirring resistance because it is the lower part of the processed product, but the load can be reduced by lowering the inclination angle within the above range. Further, since the stirring is completed in the upper stage and the middle stage, even if the inclination angle is lowered and the stirring performance of the portion is lowered, sufficient stirring performance can be exhibited as the entire apparatus. Furthermore, the inclination angle of the lowermost stirring blade does not adversely affect the blowing performance, which is the role of the stirring blade.

The inclination angle theta ₂ of the inclined surface of the middle of the stirring blades 4 is preferably 35 degrees to 45 degrees, 38 degrees to 42 degrees is more preferable. The middle stage is used to actively agitate the processed product whose temperature has been increased by fermentation heat in the upper stage. In the middle stage, if there is a lot of downward flow, it will lead to a decrease in the contact time and the amount of contact with the outside air, but by using a stirring blade having the above inclination angle, this downward flow is minimized. Can do. In addition, the larger the middle inclination angle, the better the stirring performance, but the greater the load.

  Since the high processing capacity and significant odor reduction can be achieved, the configuration shown in FIG. 2 (all 5 stages) is 20 degrees (bottom stage), 40 degrees, 40 degrees, 40 degrees, 65 degrees (top stage) from the bottom. ) Is most preferable.

  Each stirring blade 4 has a hollow portion 4e surrounded by a swash plate 4a, a bottom plate 4b, and a bent plate 4c. The hollow portion 4e of the lowermost stirring blade 4 communicates with the introduction pipe 10 (see FIG. 2) in the rotating shaft 3, and provides a ventilation path to the vent hole 4d (through hole) provided in the lower part of the bent plate 4c. Forming. Since the lower part of the bent plate 4c provided with the vent hole 4d is located on the rear side in the rotational direction, clogging due to the processed material is unlikely to occur. In the embodiment shown in FIG. 2, the vent hole is formed only in the lowermost stirring blade. However, the present invention is not limited to this. For example, the vent hole may be formed in the further stirring blade. .

  Further, a plurality of vent holes 4d are provided in the longitudinal direction of the stirring blade 4, and are formed so that the intervals become denser in the outer side in the longitudinal direction of the stirring blade (inner wall side of the container). . By arranging the vent hole 4d in this way, when taking out the compost from the take-out port 2b (see FIG. 2) provided near the inner wall side of the container 2, it can be taken out in a sufficiently ventilated and dried state. it can.

  A specific processing procedure for processing (composting) organic waste using the waste processing apparatus of the present invention is as follows.

(1) First, waste (processed material) is thrown into the waste treatment apparatus leaving a space of 10 to 20% with respect to the internal volume of the apparatus. By adding the processed product while leaving a space of 10 to 20%, the processed product is sufficiently stirred, so that fermentation and drying are efficiently performed.

(2) The treated product is fermented and dried under predetermined conditions.
There are two operation methods, “batch operation” and “continuous operation”.
(A) In the case of “batch operation”, the treated product is put into a waste treatment apparatus, the stirring blade is rotated at a low speed, and air (outside air) is introduced from the vent of the lowermost stirring blade for 5 days. Degree fermented and dried. There will be no removal or loading for the last 5 days. Thereafter, about 30% by mass of fermented and dried processed material (compost) is left in the apparatus, and the remaining 70% by mass of compost is taken out. The extracted compost becomes the product. If necessary, this may be granulated. The compost left in the waste treatment apparatus is fermented and dried for about 5 days to be composted while being stirred under the same conditions as the previous one together with the newly added treatment.
(B) In the case of “continuous operation”, the treated product is put into a waste treatment apparatus, fermented and dried for 24 hours, and about 20% by mass of compost is taken out 24 hours after the start of operation. After that, a new processed product for the taken-out amount is charged. In this way, treatment input and compost removal are repeated in a 24-hour cycle.

  In any case, when the waste treatment apparatus is used for the first time, it is preferable to add in advance about 30% by mass of the previous compost that has been fermented and taken out from this apparatus. This is because acclimated fermentative bacteria are used.

In any operation, it is preferable that the blowing rate per minute (m ³ ) is ¼ or more of the internal volume (m ³ ) of the container. By setting it within this range, the amount of treatment can be increased and the drying time can be shortened, and generation of lower odorous substances and ammonia which are malodorous substances can be suppressed. However, if the amount of air blown is too large, there is a risk that the processed product will be wound up and clogged in the exhaust pipe, so the upper limit is preferably about 1 / 2.5 of the inner volume (m ³ ) of the container. Further, the blowing pressure is preferably set to a static pressure of 15 kPa or more. The static pressure is measured by a pressure gauge provided in the ventilation pipe path from the blower blower to the vent hole of the stirring blade. By sending high-pressure air blow using such a high static pressure air blower, even when processing waste with high moisture content, the air can penetrate through the treated material, and sufficient air can be sent to the entire interior of the container. Can be spread.

  Moreover, the rotation speed of the stirring blade is adjusted in accordance with the moisture content of the processed product. Usually, the number of rotations is adjusted so as to rotate once in 40 to 60 minutes. The moisture content of the treated product also depends on the number of revolutions of the stirring blade, and the moisture content may exceed 35% in either case of being too early or too late. Further, when the moisture content exceeds 35%, it may be difficult to take out from the container.

  Since the waste treatment apparatus of the present invention is low in cost, excellent in appearance, and can be stably treated with little influence from the external environment, it is discharged from livestock excreta discharged from livestock management bodies or food industry establishments. It can be suitably used as a closed fermentation drying apparatus (component) for composting organic waste such as food residues.

DESCRIPTION OF SYMBOLS 1 Waste disposal apparatus 2 Container 3 Rotating shaft 4 Stirring blade 5 Machine room 6 Blower blower 7 Exhaust blower 8 Hydraulic unit 9 Apparatus outer wall 10 Introducing pipe 11 Outside air intake 12 Ventilation fan

Claims (4)

An airtight cylindrical vertical container, a rotating shaft provided in the container in the vertical direction, a plurality of stirring blades fixed around the rotating shaft, and an air supply for sending outside air into the container Means and exhaust means for discharging the inside air accumulated in the container to the outside of the container, introducing the outside air into the container by the air supply means, and exhausting the inside air by the exhaust means, A waste treatment device for fermenting and drying organic waste put into the container from the upper part of the container while stirring with the stirring blade, composting and taking out from the lower part of the container,
The waste treatment apparatus includes an external heat insulation panel installed so as to cover at least a part of a cylindrical outer periphery of the container via a space.   The waste treatment apparatus has heat exchange means for warming outside air introduced into the container from the air supply means by heat of exhaust from the exhaust means, and a cylindrical outer periphery of the container, the external heat insulating panel, The waste treatment apparatus according to claim 1, wherein the heat exchange means is installed in the space between the two. The outer wall of the apparatus constituted by the external heat insulation panel is a rectangular tube shape that substantially circumscribes the outer circumference of the cylinder of the container,
The heat exchanging means is an exhaust passage portion that is installed in the space of the square cylindrical corner formed between the outer wall of the apparatus and the cylindrical outer periphery of the container and through which the exhaust discharged from the container passes. The waste treatment apparatus according to claim 1, wherein the waste treatment apparatus is configured to include a ventilation pipe through which external air before introduction passes through the container installed through the exhaust passage portion.   The waste treatment apparatus according to claim 1, 2 or 3, wherein the air supply means and the exhaust means are accommodated in the apparatus.

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