Organic waste treatment device

Abstract

The purpose of the present invention is to reduce untreated materials in an organic waste treatment device. This organic waste treatment device is provided with: a reaction vessel (1) that accommodates an object to be treated; an opening / closing lid (141) that opens / closes a discharge-side opening (114) provided in the bottom of the reaction vessel (1); and a stirring device that stirs the material to be treated in the reaction vessel (1). And an opening / closing cover (141) that closes the discharge-side opening (114) in a closed state, and that is provided such that a cover upper surface (141a) thereof, which is exposed in the container interior space (111) of the reaction container (1), is close to the container inner wall surface (11a) of the reaction container (1).

Description

Technical Field

[0001] This invention relates to an organic waste treatment device. Background Technology

[0002] In recent years, as a technology for treating organic waste, and as a replacement for the previous incineration treatment using incinerators or underground burial, devices that use high-temperature and high-pressure saturated steam to hydrolyze waste under subcritical conditions have attracted attention (see, for example, Patent Document 1).

[0003] In this organic waste treatment device, the waste is fed into a sealable reaction vessel, which is then brought into a subcritical state. The waste is hydrolyzed while being stirred. The treated product is then removed through a discharge opening located at the bottom of the reaction vessel.

[0004] In existing organic waste treatment devices, an on / off valve is provided at the discharge side opening to open and close the connected discharge outlet. However, because a space where the treated material cannot be stirred is created between the valve body of the on / off valve and the internal space of the reaction vessel, a portion of the treated material remains in this unstirred space without being stirred. Therefore, there is a problem that the treated material that was not completely mixed in the finished product.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-055285. Summary of the Invention

[0006] The present invention was made to improve the above-mentioned situation, and its purpose is to reduce the amount of untreated waste in organic waste treatment devices.

[0007] The organic waste treatment apparatus of the present invention comprises: a reaction container for receiving the treated material; an opening and closing cover for opening and closing a discharge side opening disposed at the bottom of the reaction container; and a stirring device for stirring the treated material in the reaction container. The opening and closing cover, in a closed state, closes the discharge side opening and is disposed such that its upper part protruding from the container interior space of the reaction container is close to the container interior wall surface of the reaction container.

[0008] Preferably, the inner wall of the container surrounding the discharge side opening is curved into a concave shape, and the upper part of the cover is curved into a concave shape along the inner wall of the container.

[0009] Preferably, the inner wall surface of the container surrounding the discharge side opening is generally concave spherical; the upper part of the cover is curved into a generally concave spherical shape.

[0010] Preferably, the opening and closing cover comprises: a cover body, which is installed on the discharge side opening and is cylindrical; a cover body having a cover protrusion embedded in the cover body, the inner peripheral surface of the cover body being formed into a narrow cone shape on the internal space side of the container, and the outer peripheral surface of the cover protrusion being formed into a cone shape along the inner peripheral surface of the cover body.

[0011] Preferably, the discharge pipe connected to the reaction vessel is equipped with a suction mechanism for depressurizing the internal space of the reaction vessel. The organic waste treatment device is configured to use saturated water vapor to make the interior of the reaction vessel containing the treatment material subcritical, and to hydrolyze the treatment material while stirring it with the stirring device. Before opening the opening and closing cover, the suction mechanism draws the vapor from the internal space to make the internal space close to the external air pressure.

[0012] Preferably, the reaction vessel is supported on a stand, and the reaction vessel is supported on the stand via a force sensor.

[0013] Preferably, a frame-shaped metal component that surrounds the outlet when viewed from above is provided between the reaction vessel and the force sensor.

[0014] Preferably, the reaction vessel is connected to an inlet pipe for adding liquid waste.

[0015] The organic waste treatment device provided by this invention can reduce untreated waste. Attached Figure Description

[0016] Figure 1 This is a schematic front view illustrating one embodiment of an organic waste treatment device.

[0017] Figure 2 This is a schematic rear view illustrating this embodiment.

[0018] Figure 3 This is a schematic right view illustrating this embodiment.

[0019] Figure 4 This is a schematic left view illustrating this embodiment.

[0020] Figure 5 This is a schematic top view illustrating this embodiment.

[0021] Figure 6 This is a schematic bottom view representing the implementation of the method.

[0022] Figure 7 This is a schematic front view of the reaction vessel in this embodiment, enlarged.

[0023] Figure 8This is a schematic rear view of the reaction vessel in this embodiment, shown in enlarged form.

[0024] Figure 9 This is a schematic right view, enlarged to show the reaction vessel of this embodiment.

[0025] Figure 10 This is a schematic left view of the reaction vessel in this embodiment, enlarged.

[0026] Figure 11 It is an enlarged front cross-sectional view showing the lower part of the reaction vessel and the stand.

[0027] Figure 12 It is a three-dimensional view showing the lower part of the container body in cross-section.

[0028] Figure 13 It is an exploded three-dimensional view used to illustrate the mounting structure of the reaction vessel relative to the stand.

[0029] Figure 14 It is a rear three-dimensional view showing the piping section and the upper part of the support platform together.

[0030] Figure 15 This is an exploded rear perspective view illustrating the mounting structure of the reaction vessel relative to the stand in other embodiments.

[0031] Figure 16 This is an enlarged front view showing the lower part of the container body of this embodiment.

[0032] Figure 17 This is a schematic side view showing the upper part of the container in another embodiment. Detailed Implementation

[0033] Hereinafter, embodiments of the organic waste treatment apparatus of the present invention will be described based on the accompanying drawings. In the following description, in order to determine direction, terms such as "front and back" and "left and right" are used. The direction in which the rotation axis of the stirring device extends is defined as the left and right direction, and the direction orthogonal to the left and right direction and the vertical direction is defined as the front and back direction. These terms are used for ease of explanation and do not limit the technical scope of the present invention.

[0034] Overall Overview Figures 1 to 6 These are schematic front views, rear views, right views, left views, top views, and bottom views representing one embodiment of an organic waste treatment device. Figures 7-10 The views shown are the front view, rear view, right view, and left view of the reaction vessel 1, which are enlarged to represent the platform in cross-section.

[0035] The organic waste treatment device 100 includes: a reaction vessel 1 that holds the waste to be treated; a discharge-side opening and closing cover 141 that opens and closes a discharge-side opening 114 located at the bottom of the vessel body 11 of the reaction vessel 1; and a stirring device 2 that stirs the waste to be treated within the reaction vessel 1. After organic waste or other waste to be treated is placed into the sealable reaction vessel 1, the organic waste treatment device 100 uses high-temperature, high-pressure saturated steam extracted from the steam extraction pipe 12 to create a subcritical state within the reaction vessel 1, and uses the stirring device 2 to stir and hydrolyze the waste. The treated product is then removed from the discharge-side opening 114 located at the bottom of the reaction vessel 1.

[0036] The container body 11 of reaction vessel 1 is, for example, made of stainless steel and formed into a generally spherical shape, capable of accommodating the processed material. Figure 11 , 12 It is roughly spherical. The reaction vessel 1 is made of a metal such as stainless steel, and has a pressure resistance of about 5 MPa (megapascals). The reaction vessel 1 is mounted on the stand 4.

[0037] An input section 13 is provided on the upper part of the container body 11, which is capable of inputting the processed material into the container interior space 111. The input section 13 has: an input tube 131 with openings at the top and bottom, which is connected to a circular input port 112 with an opening at the upper part of the container body 11; and an opening and closing cover 132 on the input side, which can seal the upper end of the input tube 131 in a sealing manner.

[0038] A discharge section 14 is provided at the bottom of the container body 11, allowing the processed product to be removed from the internal space 111 of the container. The discharge section 14 has a discharge-side opening and closing cover 141, which can seal the circular discharge-side opening 114 at the bottom of the container body 11 in a sealing manner. The discharge-side opening 114 is formed at the bottom and top of the container body 11, thereby allowing the product to be removed from the discharge port 148 (see reference 148) provided at the discharge-side opening 114. Figure 11 , 12 The processed products are discharged by gravity.

[0039] A steam intake pipe 12 is connected to the upper part of the container body 11, which is used to draw high-temperature, high-pressure saturated steam into the internal space 111 of the container. A steam exhaust pipe 15, a safety valve connection pipe 16, an air exhaust pipe 17, a pressure gauge connection pipe 18, and a thermometer connection pipe 19 are connected to the side of the input cylinder 131 of the reaction vessel 1. Pipes installed on the piping section 7 are connected to pipes 12, 15, 16, and 17. A pressure gauge (not shown) for measuring the pressure of the internal space 111 of the container is connected to the pressure gauge connection pipe 18. A thermometer (not shown) for measuring the temperature of the internal space 111 of the container is connected to the thermometer connection pipe 19.

[0040] The stirring device 2 includes: a rotating shaft 21 horizontally inserted through the container body 11; a prime mover 22 for rotating the rotating shaft 21; and a power transmission mechanism 23 for transmitting power from the prime mover 22 to the rotating shaft 21. Stirring blades 25 are mounted on the left rotating shaft 21 via an arm 24. The stirring device 2 stirs the contents contained in the container's internal space 111 by rotating the stirring blades 25 around the rotating shaft 21 within the container's internal space 111.

[0041] Structure of discharge section and opening / closing cover Figure 11 This is an enlarged cross-sectional view showing the lower part of reaction vessel 1 and the support 4. Figure 12 This is a perspective view of the lower part of the container body 11, shown in cross-section, viewed from the left rear. See below for reference. Figure 11 , 12 The structure of the discharge section 14 will be explained.

[0042] As described above, a cover 141 is provided on the reaction vessel 1 for opening and closing the discharge-side opening 114 located at the bottom of the vessel body 11. The cover 141 is a commonly referred to clutch sealing cover, comprising: a generally cylindrical cover body 142 mounted on the discharge-side opening 114; a cover body 144 having a cover protrusion 143 embedded in the cover body 142; and a ring body 145 connecting the cover body 142 and the cover body 144. The cover body 142, cover body 144, and ring body 145 are made of metal.

[0043] The cap body 142 is generally cylindrical and is fixed to the container body 11 by welding or other means, protruding outwards. The upper end of the cap body 142 is fitted with a discharge-side opening 114. The inner circumferential surface 142b of the cap body 142 is formed into a narrow cone shape on the side of its internal container space 111. The opening of the cap body 142 connects the interior and exterior of the container body 11 to form a discharge port 148.

[0044] The cover body 144 has a generally frustoconical cover protrusion 143 that is embedded in the cover body 142 and a generally disc-shaped flange portion 146 with a diameter larger than the cover protrusion 143. The outer peripheral surface 143b of the cover protrusion 143 is formed into a cone shape along the inner peripheral surface 142b of the cover body 142.

[0045] The ring body 145 is a generally circular shape with an inner diameter larger than the outer diameter of the cover body 142 and the cover body 144. The ring body 145 has a plurality of body-side protrusions 145a protruding inward from the upper end of its inner circumferential surface and a plurality of cover-side protrusions 145b protruding inward from the lower end of its inner circumferential surface.

[0046] With the cover 141 closed, multiple body protrusions 142c protruding outward from the lower end of the outer peripheral surface of the cover body 142 and multiple cover body protrusions 146a protruding from the outer peripheral surface of the flange-like portion 146 of the cover body 144 are clamped by the protrusions 145a and 145b of the ring body 145. As a result, the lower surface of the cover body 142 is in close contact with the upper surface of the flange-like portion 146 of the cover body 144, and the sealing gasket 142d, such as the O-ring, provided on the lower surface of the cover body 142 is flattened, thereby sealing the discharge side opening 114 on which the cover 141 is installed.

[0047] When the cover 141 is opened, the ring 145 is rotated so that the cover-side protrusion 145b is positioned between adjacent cover protrusions 146a of the cover 144. This allows the cover 144 to be pulled out of the ring 145.

[0048] like Figure 11 As shown, the lid 144 is connected to the lower outer peripheral surface of the container body 11 via a hinge member 147 having a generally horizontal rotation axis 147a. Since the outer peripheral surface 143b of the lid protrusion 143 is formed into a narrow cone shape on the side of its internal container space 111, it can rotate about the rotation axis 147a of the hinge member 147 and be inserted into the lid body 142. Therefore, the opening and closing mechanism of the lid 144 can be formed with a simple structure like the hinge member 147, reducing the manufacturing cost of opening and closing the lid 141. Furthermore, the opening and closing mechanism of the lid 144 is not limited to a hinge member; for example, it could be a structure in which the lid protrusion 143 is pulled straight out along the central axis of the lid body 142 and the ring 145, and then moved outwards to a position below the outlet 148. In this case, the inner peripheral surface 142b of the lid body 142 and the outer peripheral surface 143b of the lid protrusion 143 can be parallel to the central axis of the lid body 142 instead of being cone-shaped.

[0049] In addition, such as Figure 11 , 12 As shown, when the opening and closing cover 141 is closed, the upper part 141a of the opening and closing cover 141 closes the discharge side opening 114 and is exposed to the internal space 111 of the container. The upper part 141a of the cover is formed by the upper part 142a of the main body 142 and the upper part 143a of the protrusion 143.

[0050] With the cover 141 closed, the upper part 141a of the cover is positioned close to the discharge-side opening 114. This eliminates the space around the discharge-side opening 114 where the processed material remains after being stirred by the stirring device 2, reducing the amount of unprocessed material. In this embodiment, there is no height difference between the outer periphery of the upper part 141a (here, the upper end of the cover body 142) and the upper end of the discharge-side opening 114. Furthermore, there is no height difference between the inner periphery of the upper part 141a and the outer periphery of the protruding upper part 143a. This reliably eliminates the space where the processed material remains after being stirred.

[0051] Furthermore, the upper part of the lid 141a is curved into a generally concave spherical shape along the generally concave spherical inner wall surface 11a surrounding the discharge side opening 114. Therefore, even when the stirring device 2 is driven, and the stirring blades 25 on the upper part of the lid 141a rotate close to the inner wall surface 11a of the container body 11, contact between the stirring blades 25 and the upper part of the lid 141a can be prevented, thus improving stirring efficiency. Additionally, the upper part of the lid 141a can also be positioned on the upper side (the center side of the container body 11) relative to the spherical shape of the inner wall surface 11a to a degree that does not obstruct the rotation of the stirring blades 25. For example, the upper part of the lid 141a can also be formed along a spherical shape with a diameter larger than the spherical shape of the inner wall surface 11a.

[0052] Alternatively, the upper part of the lid 141a may be located on the lower side (away from the center of the container body 11) relative to the spherical shape of the inner wall surface 11a of the container, so as not to leave any residue during the stirring of the processed material. For example, the upper part of the lid 141a may also be formed as a spherical shape with a diameter smaller than that of the inner wall surface 11a of the container, so as to be located on the lower side relative to the spherical shape of the inner wall surface 11a of the container. In addition, the outer peripheral edge of the upper part of the lid 141a is located at a position lower than the upper end of the opening of the discharge side opening 114, and a height difference may be formed between the upper part of the lid 141a and the inner wall surface 11a to the extent that no residue is left during the stirring of the processed material. This height difference can be used, for example, as a weld. In addition, the container body 11 and the lid body 142 may also be integrally formed.

[0053] Alternatively, the structure can be as follows: the upper end face of the cap body 142, having an inner diameter identical to the opening diameter of the discharge-side opening 114, is positioned opposite to the outer wall of the container body 11 surrounding the discharge-side opening 114, so that the convex upper portion 143a of the cap body 144 seals the entire opening of the discharge-side opening 114. In this case, the discharge-side opening 114 constitutes a discharge outlet, and the cap upper portion 141a is composed solely of the convex upper portion 143a.

[0054] Furthermore, the shape of the upper part 141a of the lid can be a concave shape that does not contact the stirring blade 25, and it does not have to be approximately concave spherical. For example, when the container body 11 is a horizontal cylindrical shape, the upper part 141a of the lid 141 can be bent into a concave shape along the inner wall of the container body 11.

[0055] The structure of the platform Figure 13 This is a rear perspective view used to illustrate the mounting structure of reaction vessel 1 on stand 4. Figure 14 This is a rear perspective view showing the piping section 7 and the upper part of the support frame 4 together. (Refer to...) Figure 12 , 13 The following describes platform 4.

[0056] The platform 4 has four upright supports 40 erected on the mounting surface F. Each of the four supports 40 is formed of H-beams with their axes aligned with the left-right direction and is positioned at the corner of a rectangle along the front-back and left-right directions. A first beam member 41 extending in the left-right direction is laterally supported between the middle portions of the left-right supports 40. A pair of second beam members 42 extending in the front-back direction are laterally supported between the middle portions of the first beam members 41, spaced apart in the left-right direction. A pair of third beam members 43 extending in the left-right direction are laterally supported between the middle portions of the second beam members 42, spaced apart in the front-back direction. The beam members 41, 42, and 43 are formed of H-beams with the same dimensions (cross-sectional area) as the supports 40.

[0057] A fourth beam member 44, extending in the front-to-back direction, is transversely supported between the middle portions of the front and rear columns 40. The fourth beam member 44 is formed of H-beams smaller than the columns 40. Support members 50, formed of L-shaped angle steel, are provided on the left and right sides and the back of the platform 4 to connect the lower part of the columns 40 to the middle portion of the first beam member 41 or the fourth beam member 44. There are no support members at the front of the platform 4, making it easy for operators working on the installation surface F to enter and exit the platform 4 from the front.

[0058] Fifth beam members 45, forming diagonal braces, are respectively provided at the four corners of the quadrilateral surrounded by the second beam member 42 and the third beam member 43. A pair of sixth beam members 46 are laterally erected between the second beam member 42 and the fourth beam member 44 at intervals in the front-back direction along the left-right extension line of the third beam member 43. The sixth beam member 46 extends in the left-right direction. Seventh beam members 47, extending in the front-back direction, are respectively erected between the first beam member 41 and the third beam member 43 on the front side, between the first beam member 41 and the third beam member 43 on the rear side, and between the first beam member 41 and the sixth beam member 46 on the rear side. Beam members 45, 46, and 47 are formed of H-beams with dimensions smaller than the fourth beam member 44.

[0059] An eighth beam member 48, extending in the front-rear direction, is transversely supported between the front and rear sixth beam members 46. The eighth beam member 48 is formed of C-shaped steel (channel steel) with dimensions smaller than beam members 45, 46, and 47. A ninth beam member 49, extending in the left-right direction, is transversely supported between the three rear seventh beam members 47 and beam members 42 and 44. The ninth beam member 49 is also transversely supported between the front first beam member 41 and the sixth beam member 46. The ninth beam member 49 is formed of L-shaped steel with dimensions smaller than the eighth beam member 48.

[0060] The reaction vessel 1 is placed at the intersection of the second beam member 42 and the third beam member 43. The reaction vessel 1 has four metal support legs 20 evenly spaced circumferentially on the lower part of the outer periphery of the vessel body 11. At the intersection of the second beam member 42 and the third beam member 43, a metal plate-shaped vessel platform 61 is fixed, spanning the second beam member 42, the third beam member 43, and the fifth beam member 45. The support legs 20 of the reaction vessel 1 are placed on the vessel platform 61 via force sensors 62.

[0061] As described above, the frame 4 supports the weight of the reaction vessel 1 through pillars 40 and beam members 41, 42, and 43, which are made of relatively large steel. Furthermore, a fifth beam member 45, which forms a diagonal brace, is provided at the placement location of the reaction vessel 1, and the reaction vessel 1 can be placed on a vessel mounting platform 61 that is fixed across the beam members 42, 42, and 45. Thus, even if the dimensions of the other beam members 44, 46-49 are relatively small, the frame 4 can ensure the strength to support the reaction vessel 1, thereby reducing the weight and manufacturing cost of the frame 4.

[0062] The organic waste treatment apparatus 100 of this embodiment includes a force sensor 62 between the support leg 20 of the reaction vessel 1 and the container mounting platform 61 of the stand 4. The force sensor 62 can be used to measure the weight of the material to be treated contained in the reaction vessel 1. Before starting treatment, if the weight of the material to be treated contained in the reaction vessel 1 is known, water can be added to the reaction vessel 1 before treatment begins, for example, based on the water content of the material, to form an appropriate water content, thereby improving treatment efficiency.

[0063] In addition, the four support legs 20 of the reaction vessel 1 are respectively mounted on the force sensor 62, but if Figure 15 and Figure 16As shown, a frame-shaped metal plate component 68 surrounding the discharge section 14 can also be positioned between the four support legs 20 and the force sensor 62. With this structure, since the frame-shaped metal plate component 68 distributes the weight of the reaction vessel 1, it prevents weight concentration on a single force sensor 62, thereby improving the accuracy of weight measurement of the processed material contained in the reaction vessel 1. Furthermore, heat transferred from the support legs 20 of the reaction vessel 1 to the force sensor 62 during processing can be dissipated through the frame-shaped metal plate component 68, preventing damage to the force sensor 62 due to heat.

[0064] Furthermore, the shape of the frame-shaped metal plate component 68 is not limited to a tetramorphic frame shape; any frame shape that allows the outlet 148 to be located within the frame and to span over each force sensor 62 is acceptable. For example, the frame-shaped metal plate component 68 can also be annular (ring-shaped).

[0065] Furthermore, by positioning the force sensor 62 between the reaction vessel 1 and the vessel platform 61, the distance between the vessel body 11 and the beam components 42, 43, and 45 is increased. As a result, air can flow more easily around the reaction vessel 1 during processing, improving the cooling of the lower part of the vessel body 11 and the force sensor 62, and preventing damage to the force sensor 62 caused by heat.

[0066] Continuing with the description of platform 4, a first metal floor plate 63 is laid on beam members 41-49, except for the mounting part of reaction vessel 1. Multiple first safety barriers 64 are erected along the first beam member 41 or the fourth beam member 44.

[0067] A first upper beam component 51 extending in a front-back or left-right direction is provided between the upper ends of adjacent supports 40. The first upper beam component 51 is formed of H-beam steel with the same dimensions as the fourth beam component 44. A metal upper end plate 65 is joined to the upper end of the support 40.

[0068] Four second upper beam components 52 extending in the front-to-back direction are transversely mounted between the first upper beam components 51 at the front and rear. The four second upper beam components 52 are spaced apart in the left-to-right direction, and the injection section 13 of the reaction vessel 1 is arranged between the two second upper beam components 52 near the center in the left-to-right direction. The second upper beam components 52 are formed of C-shaped steel with dimensions smaller than the seventh beam component 47 and larger than the eighth beam component 48.

[0069] Multiple third upper beam components 53 are horizontally mounted at intervals in the front-to-back direction between the first upper beam component 51 and the second upper beam component 52, and between adjacent second upper beam components 52. Metal second floor panels 66 are laid on the upper beam components 51-53. Multiple second safety railings 67 are erected along the upper beam components 51 and 52.

[0070] Between the two second upper beam components 52 closest to the center on the left and right sides of the four second upper beam components 52, two third upper beam components 53 are provided, sandwiching the input section 13 of the reaction vessel 1 from the front and back. The area behind the input section 13 is the installation area for the piping section 7. A second floor panel 66 is laid around the input section 13, but no second floor panel 66 is laid in the installation area of ​​the piping section 7.

[0071] The upper beam components 52 and 53 are positioned higher than the steam inlet pipe 12 of the reaction vessel 1, and lower than the steam outlet pipe 15, safety valve connection pipe 16, air outlet pipe 17, pressure gauge connection pipe 18, and thermometer connection pipe 19. The steam inlet pipe 12 can be accessed from the second layer of the platform 4 (on the first floor plate 63), and pipes 16 to 19 can be accessed from the third layer (on the second floor plate 66). The organic waste treatment device 100 has its steam extraction system and discharge system of the piping section 7 arranged separately at the top and bottom.

[0072] In addition, the opening and closing cover 132 of the input side of the input section 13 of the reaction vessel 1 can be accessed from the third layer (on the second floor plate 66), and the opening and closing cover 141 of the discharge section 14 can be accessed from the first layer (device mounting surface F).

[0073] Piping structure Next, refer to Figures 1-10 And 14 describes the structure of piping section 7. For example... Figure 9 As shown, a steam extraction piping section 71, connected to the steam extraction pipe 12, is arranged extending rearward in a longitudinal direction from the steam extraction pipe 12. The pipe end of the steam extraction piping section 71 is located at the rear of the frame 4 and is connected to a steam supply pipe 82 extending from the steam manifold 81. The steam manifold 81 stores steam supplied from the furnace (not shown).

[0074] In the middle section of the steam intake piping section 71, from the rear side, are sequentially arranged an intake-side on / off valve 711, an intake flow regulating valve 712, an intake-side separator 713, and a steam check valve 714. Although the diagrams of the opening and closing mechanisms of the intake-side on / off valve 711 and the intake flow regulating valve 712 are omitted, valves 711 and 712 can be automatically or manually controlled. The intake-side separator 713 is used to remove water droplets contained in the steam. The removed water droplets are discharged from the lower part of the intake-side separator 713 towards the rear via a steam water droplet drain pipe 715 extending in the front-rear direction. A check valve 716 is provided in the middle section of the steam water droplet drain pipe 715.

[0075] An air exhaust piping section 72, connected to the air exhaust pipe 17, extends rearward in a longitudinal direction from the air exhaust pipe 17. An intake-side filter 721 and a steam trap 722 are sequentially arranged in the middle of the air exhaust piping section 72 from the side of the air exhaust pipe 17. When steam is drawn into the container interior space 111 from the steam intake pipe 12, the air exhaust piping section 72 uses the intake-side filter 721 and the steam trap 722 to remove formed elements and water droplets contained in the gas discharged from the air exhaust pipe 17 and discharges them. The water droplets removed by the steam trap 722 are discharged through an air exhaust pipe 723 extending rearward in a longitudinal direction from the lower part of the steam trap 722.

[0076] The safety valve piping section 73, which is connected to the safety valve connecting pipe 16, is provided extending rearward in a front-to-back direction from the safety valve connecting pipe 16. The safety valve piping section 73 has a safety valve 731 in its middle section. When the internal space 111 of the container rises above the set pressure during processing, the safety valve 731 is activated to release the steam in the internal space 111 of the container and reduce the pressure.

[0077] like Figure 10 As shown, the steam exhaust pipe 15 is provided on the left side of the feed cylinder 131 at the top of the reaction vessel 1. The steam exhaust pipe section 74, connected to the steam exhaust pipe 15, extends to the left and then extends rearward in the left direction of the feed cylinder 131 via a downward-facing U-shaped object trap 741, further turning to the right and being guided to the rear of the feed cylinder 131. Furthermore, the steam exhaust pipe section 74 is arranged to extend rearward in a longitudinal direction from a position near the feed cylinder 131.

[0078] The downward-facing U-shaped material trap 741 can remove larger material from the discharged steam and can be accessed from the second layer of the platform 4 (on the first floor plate 63). Material residues in the material trap 741 can be removed by disassembling the blind flange provided at the bottom of the material trap 741. Alternatively, blind flanges can be provided at both the left and right ends of the bottom of the material trap 741. In this way, when removing material residues in the material trap 741, both blind flanges can be disassembled, and a tool can be inserted into the interior of the material trap 741 through one opening and extruded from the other opening, thus improving maintainability. Alternatively, the material trap 741 can also be positioned behind the feed cylinder 131.

[0079] The steam discharge pipe 74 branches off from the rear of the input cylinder 131 into a main discharge pipe 742 and an emergency discharge pipe 747. Both the main discharge pipe 742 and the emergency discharge pipe 747 are arranged extending in the front-rear direction. Furthermore, a vacuum pump (suction mechanism) is connected to the steam discharge pipe 74, allowing for pressure reduction of the internal space 111 of the container after the processed material is input and before steam is drawn in, thereby improving the suction efficiency. Alternatively, after processing, the discharge-side on / off valve 744 (described later) can be opened to discharge steam. At a moment when the pressure inside the container 111 is approximately equal to the external air pressure (e.g., when it reaches external air pressure + 0.02 MPa), the vacuum pump draws steam from the internal space 111 of the container to approach the external air pressure. This minimizes the steam outflow noise, hot air, and odor generated when the opening / closing cover 132 is opened at the end of processing. The vacuum pump can be either automatically controlled or manually controlled.

[0080] The main discharge pipe section 742 includes, sequentially from the upstream side of the exhaust flow, an exhaust-side filter 743, an exhaust-side on / off valve 744, and an exhaust flow regulating valve 745. The exhaust-side filter 743 removes relatively small particles contained in the discharged steam. Although the diagrams of the opening and closing mechanisms of the exhaust-side on / off valve 744 and the exhaust flow regulating valve 745 are omitted, valves 744 and 745 can be automatically or manually controlled. A condenser 746, which liquefies the steam, is connected to the downstream side of the exhaust flow of the main discharge pipe section 742. The condenser 746 is provided at the rear of the platform 4 in the vertical length direction and can be accessed from the second layer (on the first floor plate 63).

[0081] A manually operated valve 748 is provided in the middle of the emergency discharge pipe section 747. In the event of an emergency where the pressure inside the container 111 rises above the set pressure and does not decrease, the manually operated valve 748 is opened to release steam from the container's internal space 111 to reduce its pressure.

[0082] Depend on Figure 5 ,9 As can be seen from 10, 14, etc., almost all the pipes and components constituting the piping section 7 are concentrated at the rear of the reaction vessel 1, thus the piping system has good maintainability. In addition, the piping section 7 is located at the height of the second upper beam component 52 of the platform 4, which can be accessed from both the second and third floors, so it also has excellent maintainability in this respect.

[0083] Furthermore, the pipes and components of the piping section 7 can be supported by a portal frame erected on the second floor behind the reaction vessel 1. This portal frame can be erected on the larger second beam component 42. In this way, a sturdy portal frame can be formed to safely support the pipes and components of the piping section 7.

[0084] Structure of the stirring device Next, refer to Figures 7-10 The structure of the stirring device 2 will be explained below. As described above, the stirring device 2 has a rotating shaft 21 that is inserted horizontally through the container body 11, a prime mover 22 for rotating the rotating shaft 21, and a power transmission mechanism 23 for transmitting the power of the prime mover 22 to the rotating shaft 21.

[0085] A pair of left and right bearing base portions 211 are fixed to the left and right sides of the container body 11, protruding outwards. The two ends of the rotating shaft 21 are rotatably supported on bearings 212 provided on the bearing base portions 211. On the left and right outer sides of the bearings 212, rotating shaft sprockets 213 are fixed to the two ends of the rotating shaft 21, respectively.

[0086] The prime mover 22 is, for example, an electric motor with a reducer, mounted on a prime mover support plate 221 fixed to the second beam member 42 and the seventh beam member 47 spanning the platform 4, located behind the reaction vessel 1. The prime mover sprocket 223 is fixed to the output shaft 222 of the prime mover 22. Alternatively, other prime movers such as internal combustion engines or hydraulic motors may also be used as the prime mover 22.

[0087] The power transmission mechanism 23 has a transmission rotating shaft 231 disposed between the prime mover 22 and the reaction vessel 1. The transmission rotating shaft 231 is arranged to extend in the left-right direction. Bearing seats 232 are fixedly mounted on three seventh beam members 47 located at the rear of the frame 4. The left and right ends and the central part in the left-right direction of the transmission rotating shaft 231 are rotatably supported by bearings 233 mounted on the bearing seats 232.

[0088] A driven sprocket 234 is fixed on the transmission shaft 231 in front of the prime mover sprocket 223. A drive chain 235 is wound between the prime mover sprocket 223 and the driven sprocket 234, which can transmit the power of the prime mover 22 to the transmission shaft 231. The sprockets 223 and 234 and the drive chain 235 are covered by a cover 236.

[0089] The two ends of the drive shaft 231 are positioned diagonally below and behind the two ends of the rotating shaft 21. Drive shaft sprockets 237 are fixed to each end of the drive shaft 231. Left and right driven chains 238 are wound between the left and right rotating shaft sprockets 213 and the left and right drive shaft sprockets 237. Thus, the power of the prime mover 22 is transmitted to the rotating shaft 21 via the power transmission mechanism 23, causing the arm 24 and the stirring blades 25 to rotate around the rotating shaft 21 within the container's internal space 111, thereby stirring the processed material. The sprockets 213 and 237 and the driven chains 238 are covered by a cover 239.

[0090] Since the power of the prime mover 22 is transmitted to both ends of the rotating shaft 21 via the power transmission mechanism 23, the rotating shaft 21 will not twist even when force is applied to it during processing, thus improving durability and maintaining smooth mixing. Furthermore, efficient mixing can be achieved by switching the prime mover 22 between forward and reverse rotation during a single process, causing the stirring blades 25 to rotate in the opposite direction. Additionally, efficient mixing can be achieved by changing the rotation speed of the stirring blades 25 during a single process; for example, the rotation speed can be configured to be changed to "high speed," "medium speed," or "low speed."

[0091] Furthermore, since the prime mover 22 and the power transmission mechanism 23 are arranged in a way that effectively utilizes the empty space below the piping section 7, the organic waste treatment device 100 can be compactly formed. In addition, if the empty spaces adjacent to the left and right sides of the prime mover 22 on the second layer are effectively utilized as installation areas for hydraulic compressor 8 or air compressor 9, an even more compact organic waste treatment device 100 can be achieved.

[0092] Other implementation methods Figure 17 This is a schematic side view showing the upper part of the container in another embodiment. In this embodiment, the organic waste treatment apparatus 100 has an inlet pipe 91 for discharging liquid waste connected to the reaction container 1. This embodiment is configured such that liquid waste can be discharging into the reaction container 1 from the inlet pipe 91 without opening and closing the inlet-side cover 132.

[0093] The input pipe 91 is connected to the side of the input cylinder 131. A water tank 92 for storing liquid waste is connected to the end of the input pipe 91 opposite to the reaction vessel 1. The liquid waste stored in the water tank 92 is, for example, a slurry-like liquid such as pig manure or sludge. A first input on / off valve 93 and a second input on / off valve 94 are connected in series in the middle of the input pipe 91. Furthermore, a cleaning water pipe 95 is connected in the middle between the first input on / off valve 93 and the second input on / off valve 94 of the input pipe 91. The end of the cleaning water pipe 95 opposite to the input pipe 91 is connected to a cleaning water supply unit 96 that provides cleaning water. A cleaning water on / off valve 97 is provided in the middle of the cleaning water pipe 95.

[0094] When liquid waste from water tank 92 is added to reaction vessel 1, with the inlet-side cover 132 and the outlet-side cover 141 closed, the first and second inlet valves 93 and 94 are opened to allow the liquid waste to flow into reaction vessel 1. Alternatively, the outlet-side valve 744 of the steam outlet pipe 74 can be opened, and the vacuum pump (suction mechanism) connected to the steam outlet pipe 74 can be activated to depressurize the internal space 111 of reaction vessel 1, thereby improving the efficiency of liquid waste input. Alternatively, the cleaning water valve 97 can be opened to allow cleaning water to flow into the internal space 111 of the vessel along with the liquid waste.

[0095] In this embodiment, with the inlet cover 132 closed, liquid waste can be introduced into the reaction vessel 1 through the inlet pipe 91. Therefore, it is possible to prevent the odor emitted from the liquid waste from spreading to the periphery of the reaction vessel 1, thereby improving the working environment. Alternatively, when depressurizing the internal space 111 of the vessel using a vacuum pump connected to the steam exhaust pipe 74, a deodorizing device can be connected to the middle of the steam exhaust pipe 74 to prevent the emission of odors.

[0096] After liquid waste is added to the reaction vessel 1, the first on / off valve 93 is opened, while the second on / off valve 94 is closed. Then, the cleaning water on / off valve 97 is opened, allowing cleaning water to flow from the cleaning water supply unit 96 through the cleaning water pipe 95 into the on / off pipe 91, thus cleaning the on / off pipe 91. The portion of the on / off pipe 91 near the reaction vessel 1 slopes downwards towards the reaction vessel 1. This creates a structure where liquid waste is less likely to remain inside the portion of the on / off pipe 91 near the reaction vessel 1. Furthermore, when the reaction vessel 1 is brought to a subcritical state using high-temperature, high-pressure saturated steam to hydrolyze the liquid waste, the first on / off valve 93 is closed. Since the second on / off valve 94 and the cleaning water on / off valve 97 are not subjected to the high pressure required for processing, cheaper valves than the first on / off valve 93 can be selected, thereby reducing manufacturing costs.

[0097] exist Figure 17 In the reaction vessel 1, the inlet pipe 91 is connected to the inlet cylinder 131, but it can also be connected to the upper part of the vessel body 11. Alternatively, a pump for conveying liquid waste from the water tank 92 to the reaction vessel 1 can be installed in the middle of the inlet pipe 91.

[0098] The above describes this embodiment, but the present invention is not limited to the above embodiment and can be embodied in various ways. The structures of each part are not limited to the illustrated embodiment, and various modifications can be made as long as they do not depart from the spirit of the present invention. For example, the structures described in the above embodiments and variations (exceptions, etc.) can also be combined. Furthermore, structures can be added to, omitted, replaced, or changed to other structures.

[0099] For example, a bearing support frame can be installed on the stand 4 to support the bearing 212, which in turn rotatably supports the shaft 21. In this case, the size of the beam component in which the bearing support frame is erected in the stand 4 can be increased to improve the support stiffness of the bearing 212. Alternatively, a force sensor can be sandwiched between the bearing support frame and the beam component, allowing the weight of the processed material placed in the internal space 111 of the container to be measured using this force sensor and the force sensor 62 located below the support leg 20 of the container body 11. In this case, a plate-like component covering these force sensors can be sandwiched between the bearing support frame and the force sensor below it, and between the support leg 20 and the force sensor 62, so that the weight of the reaction container 1 is distributed among these force sensors.

[0100] Alternatively, two organic waste treatment units 100 can be arranged approximately adjacent to each other, sharing a steam manifold 81. Additionally, the steam exhaust pipe 15 can also be connected to the feed cylinder 131. Furthermore, at least one of the safety valve connection pipe 16, air exhaust pipe 17, pressure gauge connection pipe 18, and thermometer connection pipe 19 can also be connected to the container body 11.

[0101] This specification contains the structure of the following embodiments.

[0102] like Figure 12 , 13As shown, the organic waste treatment apparatus of the embodiment includes: a reaction vessel 1 that holds the treated material and has a discharge port 148 at its bottom; and a platform 4 that supports the reaction vessel 1. The platform 4 includes: four pillars 40, which are erected at the four corners of a rectangle in plan view on the device mounting surface; a pair of first beam members 41, which are laterally supported between the pillars 40 arranged along one side of the rectangle; a pair of second beam members 42, which extend in a second direction orthogonal to the first direction and are laterally supported at intervals between the middle portions of the first beam members 41; a pair of third beam members 43, which extend in the first direction and are laterally supported at intervals between the middle portions of the second beam members 42; and fifth beam members 45, which are respectively provided at the four corners of the quadrilateral formed by the second beam members 42 and the third beam members 43. The fifth beam members 45 form diagonal bracing members. The pillars 40 and the beam members 41, 42, 43, and 45 are made of steel. The reaction vessel 1 is positioned such that the outlet 148 is located within the quadrilateral frame as seen from above at the intersection of the second beam member 42 and the third beam member 43, while it is placed across the second beam member 42, the third beam member 43 and the fifth beam member 45.

[0103] In the fundamental embodiment of the organic waste treatment apparatus, the weight of the reaction vessel 1 is supported by steel supports 40 and first to third beam members 41-43. Furthermore, the presence of a fifth beam member 45 (diagonal brace) at the mounting point of the reaction vessel 1 enhances its supporting rigidity. This also improves the support rigidity of the reaction vessel 1, even if other beam members constituting the frame 4 (e.g., Figures 1 to 3 The fourth beam component 44, the sixth to ninth beam components 46 to 49 shown are relatively small in size, which can ensure the strength of supporting the reaction vessel 1 and reduce the weight and manufacturing cost of the stand 4.

[0104] like Figures 7-10 As shown, the fifth beam component 45 (diagonal brace component) is formed of steel with a smaller cross-sectional area than the first to third beam components 41 to 43.

[0105] According to this method, by making the cross-sectional area of ​​the fifth beam component 45 (diagonal brace component) relatively small, the weight and manufacturing cost of the platform can be reduced.

[0106] like Figures 7-12 As shown, in the frame 4, a metal container platform 61 is fixed at the intersection of the second beam member 42 and the third beam member 43, spanning the second beam member 42, the third beam member 43, and the fifth beam member 45. Furthermore, the reaction vessel 1 is placed on the container platform 61.

[0107] According to this embodiment, since the reaction vessel mounting part of the stand 4 can form a more robust structure, the reaction vessel 1 can be reliably supported, thus improving safety.

[0108] like Figures 1-4 As shown in Figures 6 and 7, the platform 4 has a pair of fourth beam members 44 that are transversely supported between the aforementioned columns arranged along the second direction. The fourth beam members 44 are provided extending along the second direction. On three of the four outer peripheral sides enclosed by the columns 40 and the first and fourth beam members 41 and 44, support members 50 are provided to connect the lower part of the first or fourth beam member 41 or 44 of the column 40 to the middle part of the fourth beam member 41 or 44.

[0109] According to this implementation, the rigidity and strength of the platform 4 can be improved by providing the support member 50, and by not providing the support member 50 on one of the four outer peripheral sides, the operator can easily enter and exit the platform 4, thus improving workability.

[0110] like Figures 7-13 As shown, the reaction vessel 1 is supported on the stand 4 via a force sensor 62.

[0111] According to this implementation method, the weight of the processed material contained in the reaction vessel 1 can be measured, so the processing time and processing temperature can be adjusted according to the weight of the processed material and the pre-measured moisture content, or water can be added, thereby improving the processing efficiency.

[0112] In addition, such as Figure 15 As shown, a frame-shaped metal plate component 68 (frame-shaped metal component) that surrounds the outlet 148 when viewed from above can also be set between the reaction vessel 1 and the force sensor 62.

[0113] According to this embodiment, since the frame-shaped metal plate component 68 can distribute the weight of the reaction vessel 1, it can prevent the weight from concentrating on a single force sensor 62, thereby improving the measurement accuracy of the weight of the processed material contained in the reaction vessel 1. In addition, during processing, the heat transferred from the reaction vessel 1 to the force sensor 62 can be dissipated through the frame-shaped metal plate component 68, preventing heat-induced damage to the force sensor 62.

[0114] like Figure 5 , 7As shown in Figures 10, 13, and 14, the organic waste treatment apparatus of this embodiment includes a reaction vessel 1 for receiving the waste to be treated, which has an inlet 112 at the top and an outlet 148 at the bottom. The reaction vessel 1 has an inlet cylinder 131 with openings at both the top and bottom, which is connected upwards to the inlet 112 opening at the top of the vessel body 11, and an opening / closing cover 132 on the inlet side, which can seal the upper end of the inlet cylinder 131. A steam extraction pipe 12 for drawing saturated water vapor into the internal space 111 of the vessel is connected to the upper part of the vessel body 11. On the other hand, a steam discharge pipe 15, a safety valve connection pipe 16, and an air discharge pipe 17 are connected to the side of the inlet cylinder 131.

[0115] According to this embodiment of the organic waste treatment device, the steam injection pipe and the steam discharge pipe into the reaction vessel 1 can be arranged separately, which can reduce the possibility of confusing the injection pipe and the discharge pipe during maintenance and improve maintainability.

[0116] like Figure 5 , 9 As shown in Figures 10, 14, etc., the organic waste treatment apparatus of the embodiment has a piping section 7, which extends from the steam inlet pipe 12, the steam outlet pipe 15, the safety valve connection pipe 16, and the air outlet pipe 17, and extends in the same direction from a position near the reaction vessel 1.

[0117] With this implementation method, the piping system can be centrally configured, resulting in good maintainability.

[0118] like Figure 9 , 10 As shown in Figures 14 and 15, the organic waste treatment apparatus of the embodiment has a support platform 4 that supports the reaction vessel 1. The support platform 4 has a first floor plate 63 (first floor portion) disposed at a height position below the reaction vessel 1 and a second floor plate 66 (second floor portion) disposed at a height position above the reaction vessel 1. Piping constituting the piping section 7 extends along the second floor plate 66 (second floor).

[0119] According to this implementation, each piping can be accessed from both the first floor section and the second floor section, thus improving maintainability.

[0120] like Figures 8-10 As shown in Figures 14, the organic waste treatment apparatus of the embodiment includes a stirring device 2 for stirring the material to be treated in the reaction vessel 1. The drive source (prime mover 22 and power transmission mechanism 23) of the stirring device 2 is located below the piping section 7 and above the first floor plate 63 (first floor section).

[0121] According to this embodiment, since the empty space of the first floor below the piping section 7 can be effectively utilized, an organic waste treatment device can be compactly formed.

[0122] Alternatively, the structures described in the above embodiments can be combined. Furthermore, the structures can be added to, omitted, replaced, or otherwise modified.

[0123] Symbol Explanation 1 Reaction vessel, 2 Stirring device, 4 Stand, 7 Piping section, 11 Container body, 11a Container inner wall, 100 Organic waste treatment device, 111 Container internal space, 114 Discharge side opening, 141 Opening and closing cover, 141a Cover upper surface, 142 Cover body, 142a Body upper surface, 142b Inner circumferential surface, 142c Body protrusion, 142d Sealing gasket, 143 Cover protrusion, 143a Protrusion upper surface, 143 Outer circumferential surface, 144 Cover body, 145 Ring body, 145a Body side protrusion, 145 Cover side protrusion, 146 Flange-shaped part, 146a Cover body protrusion, 148 Discharge outlet.

Claims

1. An organic waste treatment device, characterized in that, have: Reaction vessel, used to store and process materials; The opening and closing mechanism controls the opening and closing of the discharge-side opening located at the bottom of the reaction vessel; and A stirring device is used to stir the material being processed within the reaction vessel. The opening and closing cover, when closed, seals the discharge-side opening and is positioned such that its upper surface protrudes from the interior space of the reaction vessel, so that no processed material remains around the discharge-side opening when the processed material is stirred by the stirring device, and is close to the inner wall of the reaction vessel. The upper part of the cover is formed by the upper part of the main body of the cover body and the upper part of the protruding portion of the cover body. The cover body is installed at the discharge side opening and is cylindrical. The cover body has a protruding portion that is embedded in the cover body. No holes are formed on the upper part of the protrusion.

2. The organic waste treatment device according to claim 1, characterized in that, A suction mechanism for depressurizing the internal space of the reaction vessel is connected to the discharge pipe of the reaction vessel. The internal space of the reaction vessel containing the processed material is brought into a subcritical state by using saturated water vapor. The material is then hydrolyzed while being stirred by the stirring device. Before the opening and closing lid is opened, the vapor in the internal space is automatically drawn out by the suction mechanism, so that the internal space is close to the external air pressure.

3. The organic waste treatment device according to claim 1 or 2, characterized in that, A suction mechanism for depressurizing the internal space of the reaction vessel is connected to the discharge pipe of the reaction vessel. The suction mechanism is automatically controlled to improve the steam extraction efficiency by depressurizing the internal space of the reaction vessel before steam is drawn into the internal space of the reaction vessel containing the processed material.

4. The organic waste treatment device according to claim 1 or 2, characterized in that, The reaction vessel includes: an input cylinder with openings at the top and bottom, the input cylinder being connected upwardly to an input port opening at the top of the vessel body; and an opening and closing cover on the input side, the opening and closing cover on the input side being capable of sealing the upper opening of the input cylinder in a tight seal. The reaction vessel is connected to an inlet pipe on the side of the inlet cylinder or on the upper part of the vessel body, which allows liquid waste to be added without opening or closing the inlet side cover.

5. The organic waste treatment device according to claim 4, characterized in that, A first on / off valve and a second on / off valve are connected in series in the middle of the input pipe, and a cleaning water pipe is connected to the middle section between the first on / off valve and the second on / off valve of the input pipe. The end of the cleaning water pipe opposite to the inlet pipe is connected to the cleaning water supply unit that provides cleaning water. A cleaning water on / off valve is installed in the middle of the cleaning water pipe.

6. The organic waste treatment device according to claim 4, characterized in that, A suction mechanism for depressurizing the internal space of the reaction vessel is connected to the discharge pipe of the reaction vessel. When liquid waste is introduced into the reaction vessel through the inlet pipe, the suction mechanism is automatically controlled to depressurize the internal space of the reaction vessel.

7. The organic waste treatment device according to claim 4, characterized in that, The portion of the inlet tube closest to the reaction vessel is inclined downwards toward the reaction vessel.

8. The organic waste treatment device according to claim 1 or 2, characterized in that, The reaction vessel includes: an input cylinder with openings at the top and bottom, the input cylinder being connected upwardly to an input port opening at the top of the vessel body; and an opening and closing cover on the input side, the opening and closing cover on the input side being capable of sealing the upper opening of the input cylinder. A steam extraction pipe for drawing saturated water vapor into the internal space of the reaction vessel is connected to the upper part of the container body, and a steam discharge pipe, a safety valve connection pipe, and an air discharge pipe are connected to the side of the input cylinder.

9. The organic waste treatment device according to claim 8, characterized in that, have: The piping section extends from the steam inlet pipe, the steam outlet pipe, the safety valve connection pipe, and the air outlet pipe, respectively, and extends in the same direction from a location near the reaction vessel.

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