Pyrolytic furnace

Abstract

To provide a pyrolytic furnace which enables efficient conversion into calcium carbonate.SOLUTION: A pyrolytic furnace 100 includes: a double structure housing comprising an outer housing 210 and an inner housing 220; a gas supply system 500 which supplies a gas to a space formed between the outer housing 210 and the inner housing 220; a plurality of holes 226 formed at the inner housing 220; nozzle devices 300 which are provided corresponding to the holes 226; a placement part for placing a predetermined material into the inner housing 220; and an exhaust system 900 which exhausts exhaust air from the double structure housing. The nozzle device 300 has a curved cylindrical shape.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a pyrolysis furnace. [Background technology]

[0002] Patent Document 1 (JP 2014-13136 A) discloses a magnetic field pyrolysis furnace that, during normal operation, requires only a pilot flame, no fuel or electricity, and is capable of completely burning combustible materials, producing only minimal ash.

[0003] The magnetic field pyrolysis furnace described in Patent Document 1 comprises a vertical cylindrical sealed housing, an inner cylinder installed inside the housing at a predetermined distance from the outer wall of the housing, a grate installed at a position a predetermined distance higher than the bottom of the inner cylinder, multiple intake pipes attached to the housing so that the intake port at the base end is located outside the housing and the outlet at the tip end is located in the space between the top of the grate and the bottom of the inner cylinder, permanent magnets installed near the intake port of each intake pipe to apply a magnetic field to the sucked-in air, an inlet and an inlet door for introducing combustible material from outside the housing, a recovery inlet and a recovery door for recovering incineration ash that has fallen from the grate, and a dry distillation gas treatment tank through which exhaust gas discharged from the space between the outer wall of the inner cylinder and the inner wall of the housing passes.

[0004] Patent Document 2 (JP 2014-113574 A) discloses a magnetic pyrolysis device that can efficiently pyrolyze organic waste in a short time and can perform pyrolysis of organic waste at a stable temperature for a long period of time.

[0005] The magnetic pyrolysis device described in Patent Document 2 comprises a pyrolysis furnace of a predetermined volume, an air supply mechanism for supplying air to the pyrolysis furnace, and an exhaust mechanism for exhausting gas from the pyrolysis furnace, wherein the pyrolysis furnace has an organic matter storage space for storing organic matter to be decomposed, a treated ash storage space located below the organic matter storage space into which treated ash from the organic matter falls, an inlet that is opened and closed by an opening and closing mechanism installed in the pyrolysis furnace to introduce organic matter into the organic matter storage space, and an outlet that is opened and closed by an opening and closing mechanism installed in the pyrolysis furnace to remove treated ash from the treated ash storage space, and in this magnetic pyrolysis device that thermally decomposes organic matter using magnetic heat, the peripheral walls of the pyrolysis furnace are made up of a first peripheral wall facing the outside of the pyrolysis furnace, a second peripheral wall located inside the first peripheral wall, and a second peripheral wall located inside the second peripheral wall facing the storage space. and a third peripheral wall extending from the first peripheral wall to the top of the organic matter storage space, the pyrolysis furnace having an airtight insulation layer defined between the first and second peripheral walls, extending into the treated ash storage space, and extending from the bottom to the top of the organic matter storage space, and an air fluidization layer defined between the second and third peripheral walls, extending from the bottom to the top of the organic matter storage space, the air supply mechanism including a plurality of first air supply pipes installed in the peripheral wall extending to the bottom of the organic matter storage space and allowing air to flow from the bottom side into the organic matter storage space and the air fluidization layer, and permanent magnets attached to the first air supply pipes and magnetizing the air passing through the first air supply pipes, and the exhaust mechanism including a gas exhaust pipe extending from the pyrolysis furnace to the outside, and a blower installed in the gas exhaust pipe for forcibly exhausting gas generated in the organic matter storage space during the pyrolysis of the organic matter.

[0006] Patent Document 3 (JP 2012-73016 A) discloses a pyrolysis device that can efficiently incinerate waste materials such as waste plastics, waste wood, food waste, used paper, and sticky sludge.

[0007] The pyrolysis apparatus described in Patent Document 3 is a pyrolysis apparatus comprising a cylindrical treatment chamber with a bottom for thermally decomposing waste, a magnetic action means arranged on the bottom plate of the treatment chamber and applying a magnetic force to the waste, an insulating material layer I laid around the magnetic action means on the bottom plate of the treatment chamber, and an air introduction pipe arranged on the side of the treatment chamber.The magnetic action means comprises a magnet arranged so that its north pole and south pole face vertically, an insulating material layer II covering the magnet, and a paramagnetic plate-like body arranged above and close to the magnet so as to be magnetically guided by the magnet.

[0008] Patent Document 4 (JP Patent Publication No. 2004-33966 / JP Patent No. 4108387) discloses a treatment technology that can detoxify combustible waste without requiring large-scale high-temperature incineration facilities and without generating dioxins or coplanar PCBs.

[0009] The waste treatment method described in Patent Document 4 is a waste treatment device comprising an incinerator, an intake passage connected to the incinerator, an exhaust passage opening at the top of the incinerator, and magnets installed in the intake passage, the magnets being arranged within a housing made of a non-magnetic material installed in the intake passage so that their magnetic poles face each other across the intake passage, and held against the inner surface of the housing via radial gaps and axial gaps that communicate with the intake passage.

[0010] Patent Document 5 (Japanese Patent Laid-Open Publication No. 2006-223974) discloses a waste treatment furnace that can treat waste uniformly and completely when treating the waste, thereby improving the treatment efficiency.

[0011] The waste treatment furnace described in Patent Document 5 is a waste treatment furnace comprising a sealed container into which waste is put, an exhaust passage provided at the top of the sealed container for exhausting gas generated inside the sealed container, an air intake passage provided in the sealed container for sending a small amount of air into the sealed container, and a pair of magnets provided on either side of the air intake passage to form a magnetic field that crosses the air intake passage.A partition wall is provided inside the sealed container at a distance from the inner wall surface, and part of the air intake passage is formed by a conduit that protrudes from the inner wall surface of the sealed container toward the inside, and the opening surface at the tip of the conduit is formed at an angle with respect to the axis of the conduit.

[0012] Patent Document 6 (JP Patent Publication No. 2007-209843) discloses a magnetic generator that promotes thermal decomposition using only magnetism, without requiring fuel such as petroleum or electricity, and performs waste decomposition processing at low running costs while suppressing the generation of dioxins.

[0013] The magnetizer described in Patent Document 6 has a flow passage through which a fluid can flow, magnetic parts formed from magnetic steel and constituting part or all of two opposing sides of the flow passage, openings provided in each of the magnetic parts that communicate with the inside and outside of the flow passage, a pair of magnet parts provided outside the flow passage so as to close each opening, and a frame body that holds the flow passage and the magnet parts.

[0014] Patent Document 7 (JP 2009-113008 A / JP 4486671 A) discloses a fluid magnetizer, a magnetized fluid feeder, a magnetic treatment device, and a magnetic treatment method that improve the treatment speed and enable long-term operation.

[0015] The magnetized fluid supply machine described in Patent Document 7 comprises a fluid magnetizer having a tubular section made of resin, having a first central axis and through which a fluid flows, and a magnet section formed in a circular tube shape having a second central axis and arranged so that the magnetization direction is approximately the same as the first central axis and the second central axis, and a box section inside which a plurality of the fluid magnetizers are fixed, wherein the magnet section comprises an intermediate section made of resin and a pair of magnets arranged opposite each other with different magnetic poles, sandwiching the intermediate section therebetween, and a member having an electrical or magnetic polarity is filled in part of the box section so as to cover the periphery of the magnet section. [Prior art documents] [Patent documents]

[0016] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-13136 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-113574 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-73016 [Patent Document 4] Japanese Patent Application Laid-Open No. 2004-33966 [Patent Document 5] Japanese Patent Application Laid-Open No. 2006-223974 [Patent Document 6] Japanese Patent Application Laid-Open No. 2007-209843 [Patent Document 7] Japanese Patent Application Laid-Open No. 2009-113008 Summary of the Invention [Problem to be solved by the invention]

[0017] Various devices have been developed and researched in Patent Documents 1 to 7. As disclosed in Patent Documents 6 and 7, it is presumed that gas supply is an important key in a pyrolysis furnace.

[0018] However, none of the devices disclosed in Patent Documents 1 to 7 achieved results that could be put on a commercial basis, which was a problem. Furthermore, before the SDGs were proposed, research and development of pyrolysis furnaces had come to a near standstill, and even after the SDGs were proposed, no product development had been carried out that could be put on a commercial basis. That is, it was not possible to efficiently convert it into calcium carbonate in the pyrolysis furnace.

[0019] The main object of the present invention is to provide a pyrolysis furnace capable of efficiently converting wastewater into calcium carbonate. [Means for solving the problem]

[0020] (1) A pyrolysis furnace according to one aspect includes a double-structured housing consisting of an outer housing and an inner housing, a gas supply port that supplies gas to a space formed between the outer housing and the inner housing, a plurality of holes formed in the inner housing, a nozzle portion provided in accordance with the plurality of holes, an input portion that inputs a predetermined raw material into the inner housing, and an exhaust port that discharges exhaust gas from the double-structured housing, wherein the nozzle portion has a curved cylindrical shape.

[0021] In this case, the specified raw material is loaded into the inner housing. Next, gas is supplied from the gas supply port through the space and the nozzle, and the specified raw material is ignited. After that, exhaust gas is discharged from the exhaust port. Finally, the specified raw material is processed into calcium carbonate. Many patent applications have been filed for conventional pyrolysis furnaces, especially those in low-temperature ranges, but there have been problems with their lack of feasibility. The inventors discovered that the provision of multiple holes and the curved cylindrical shape of the nozzle portion enable efficient continuous or continuous supply of gas to a predetermined raw material. Furthermore, they discovered that the use of a curved cylindrical shape can prevent clogging of the gas supply path that can occur in a pyrolysis furnace. As a result, the specified raw materials could be efficiently converted into calcium carbonate.

[0022] (2) A pyrolysis furnace according to a second aspect of the present invention is a pyrolysis furnace in which the nozzle portion comprises a 90-degree elbow pipe joint, and the nozzle portion may spray gas inside the inner casing and downward from the horizontal.

[0023] In this case, the nozzle portion can eject gas from the hole in the inner housing toward the inside of the inner housing, which prevents foreign matter from flowing back into the nozzle portion and reliably prevents clogging of the nozzle portion.

[0024] (3) The pyrolysis furnace according to the third invention is the pyrolysis furnace according to the second invention, further including thermometers arranged on at least four surfaces constituting the inner surface of the inner casing, and the nozzle portions may be arranged on at least four surfaces constituting the inner surface of the inner casing, with a pitch of 200 mm or less between adjacent nozzle portions.

[0025] The pyrolysis reaction carried out in the present invention is a low-temperature combustion that oxidizes organic matter to obtain calcium carbonate, and therefore the temperature inside the furnace is controlled to a level that does not cause flaming combustion. In order to effectively promote such a pyrolysis reaction, it is preferable to create a low-oxygen state with an oxygen concentration of about 8% to 11%, and to control the reaction temperature of the organic matter to 100°C to 400°C. Meanwhile, the inventors' experiments have revealed that the pyrolysis reaction of organic matter in a furnace does not proceed throughout the entire organic matter, but rather proceeds locally, mainly in areas with a high carbon content and low water content. Furthermore, it has been confirmed that the drying of areas with a high water content is promoted by receiving heat from other reaction areas, so that the center of the pyrolysis reaction moves throughout the organic matter, and the reaction proceeds sequentially within the organic matter.

[0026] In the pyrolysis furnace according to the third invention, thermometers are placed on at least four surfaces that make up the inner surface of the inner casing, so that even if the position of the reaction center within the organic matter moves, the situation can be correctly grasped, and the pyrolysis reaction can be reliably controlled. Furthermore, the nozzle sections are arranged on at least four surfaces that make up the inner surface of the inner housing, and the nozzle sections on each surface are arranged at a pitch of 200 mm or less, so that a predetermined amount of oxygen gas is supplied evenly to the entire organic matter, and therefore a predetermined amount of oxygen gas can be supplied to the location where the reaction center has moved, ensuring control of the pyrolysis reaction at the reaction center. Therefore, compared to when the temperature of the entire furnace or the entire organic matter is controlled, it is possible to prevent the temperature of a local reaction center from becoming higher or lower than a suitable value, thereby improving the yield of calcium carbonate and reducing the risk of flames occurring in the organic matter. This makes it possible to provide a pyrolysis furnace that can perform favorable low-temperature combustion even when various types of organic matter are fed into it.

[0027] (4) A pyrolysis furnace according to a fourth aspect of the present invention is a pyrolysis furnace in which the inner housing mainly includes a rectangular cylindrical portion and a square support portion having an internal space formed and communicating with the rectangular cylindrical portion, and the outer housing may mainly have a rectangular box shape capable of housing the inner housing.

[0028] In this case, since the inner housing has a rectangular cylindrical portion at the top and a truncated quadrangular pyramid portion at the bottom, the raw material fed inside can be easily collected vertically downward. That is, by providing a screw conveying portion or the like at the tip side of the truncated quadrangular pyramid, calcium carbonate can be easily collected.

[0029] (5) A pyrolysis furnace according to a fifth aspect of the present invention is a pyrolysis furnace in which the plurality of holes are arranged in a staggered pattern, and 80% or more of the plurality of nozzle portions have outlets extending vertically downward, and the remaining nozzle portions have outlets extending toward the corners of the inner casing.

[0030] In this case, gas can be appropriately sprayed from the nozzles onto the specified raw material that has been put in. Also, some nozzles are sprayed toward the corners of the inner casing, which prevents problems such as part of the specified raw material not being processed, and allows the specified raw material to be processed in its entirety.

[0031] (6) A pyrolysis furnace according to a sixth aspect of the present invention may be such that the plurality of holes are provided in a region of the inner casing that is 30% or more in depth from the bottom.

[0032] In this case, holes are provided not only in the lower part of the inner housing but also in an area of ​​30% or more from the bottom, so that gas can be supplied evenly to the specified raw material, decomposition processing can be carried out gradually from the bottom, and the processing can be moved upward to complete all processing.

[0033] (A) The gas supply system according to aspect A is a gas supply system that supplies gas to a pyrolysis furnace, and includes a supply port that supplies atmospheric air, an exhaust port that discharges the gas, a partial exhaust port that discharges a portion of the air, and a housing that has the supply port on one side, the exhaust port on the other side, and the partial exhaust port from the center toward the exhaust port side, and the housing is provided with one or more Tesla valve structures and a magnetic force generating unit that separates a portion of the air.

[0034] In this case, by providing one or more Tesla valve structures, the air is diffused, and the oxygen component of the air is separated by the magnetic force generating unit, allowing a portion of the oxygen component to be discharged from a partial outlet. As a result, gas with a reduced oxygen content can be supplied to the pyrolysis furnace. Therefore, organic matter can be efficiently converted into calcium carbonate in the pyrolysis furnace. For example, the gas preferably has an oxygen content of 8% or more and 11% or less.

[0035] (B) A gas supply system according to invention B is a gas supply system according to aspect A, wherein the housing has a rectangular parallelepiped shape, a pump is connected to the supply port, and some of the exhaust ports may be provided with valves that can be opened and closed automatically or manually.

[0036] In this case, one or more Tesla valve structures are provided inside a rectangular parallelepiped housing, and air is supplied by a pump. Furthermore, since some of the outlets can be opened and closed by valves provided thereon, desired gases can be supplied to the pyrolysis furnace.

[0037] (C) A gas supply system according to invention C is the gas supply system according to aspect A, wherein the magnetic force generating unit comprises a magnet, and the Tesla valve structure maintains the air supplied from the supply port at a constant speed and discharges a constant amount of gas from the discharge port.

[0038] In this case, the magnetic force generating unit is made of a magnet, so it can efficiently separate oxygen from the air. That is, oxygen is a paramagnetic substance and moves toward the magnet, and by discharging a portion of it through the outlet, it is possible to adjust the oxygen concentration of the gas supplied to the pyrolysis furnace. Furthermore, the Tesla valve structure allows the air to be diffused while hitting the magnet, so that some oxygen can be discharged from the outlet and a certain amount of gas can be efficiently discharged from the outlet. The magnet may be any magnet that generates magnetic force, such as a neodymium magnet, an electromagnet, a ferrite magnet, or a permanent magnet.

[0039] (D) A gas supply system according to a Dth aspect of the present invention is the gas supply system according to the Ath aspect, wherein the Tesla valve structure includes one or more blade members, and one or more magnetic force generating units are attached to the blade members.

[0040] In this case, the air is diffused by one or more blade members and is directed against one or more magnetic force generating units, and oxygen is attracted by the magnetic force, so that gas with a low oxygen concentration can be discharged from the outlet. Also, the air with a high oxygen content that is attracted by the Tesla valve structure and the magnetic force generating units can be properly discharged from a portion of the outlet.

[0041] (E) A gas supply system according to an E aspect of the present invention is the gas supply system according to the A aspect, wherein one or more magnetic force generators may be provided on the surface on which the exhaust port is provided.

[0042] In this case, one or more magnetic force generating units are provided on the surface on which the partial exhaust port is provided, so that oxygen can be efficiently exhausted from the partial exhaust port.

[0043] (F) A gas supply method according to another aspect is a gas supply method for supplying gas to a pyrolysis furnace, and includes a supply step in which atmospheric air is supplied from one side of a housing, a Tesla valve step in which the air is adjusted to a predetermined speed inside the housing, a partial discharge step in which a portion of the air is separated by magnetic force and discharged from inside the housing, and a discharge step in which the gas is discharged from the other side of the housing and supplied to the pyrolysis furnace.

[0044] In this case, by providing one or more Tesla valve steps, the air is diffused, and the oxygen component of the air is separated by magnetic force, allowing a portion of the oxygen component to be discharged from a partial outlet. As a result, gas with a reduced oxygen content can be supplied to the pyrolysis furnace. Therefore, organic matter can be efficiently converted into calcium carbonate in the pyrolysis furnace.

[0045] (G) According to yet another aspect, a pyrolysis furnace includes a pyrolysis furnace having a predetermined volume, a gas supply system according to any one of claims A to E that supplies gas to the pyrolysis furnace, and an exhaust mechanism that exhausts the gas from the pyrolysis furnace.

[0046] In this case, a gas with a low oxygen concentration can be supplied to the pyrolysis furnace, so that organic matter can be efficiently converted into calcium carbonate. [Brief explanation of the drawings]

[0047] [Figure 1] 1 is a schematic diagram showing an example of the internal structure of a pyrolysis furnace according to an embodiment of the present invention. FIG. [Figure 2] 1 is a schematic diagram showing an example of the appearance of a pyrolysis furnace body according to an embodiment of the present invention. FIG. [Figure 3] 1 is a schematic cross-sectional view showing an example of the internal structure of a pyrolysis furnace body according to an embodiment of the present invention. [Figure 4] FIG. 2 is a schematic diagram showing an example of an inner housing viewed from above. [Figure 5] FIG. 2 is a schematic cross-sectional view showing a cross section of the inner housing taken along line CC. [Figure 6] FIG. 2 is a schematic cross-sectional view showing a cross section of the inner housing taken along line DD. [Figure 7] FIG. 10 is a schematic diagram showing an example of an inner housing viewed from above. [Figure 8] FIG. 2 is a schematic cross-sectional view showing an example of a nozzle device. [Figure 9] FIG. 2 is a schematic cross-sectional view showing an example of the internal structure of a gas supply system. [Figure 10] FIG. 3 is a schematic cross-sectional view taken along line E-E showing an example of the arrangement of magnets in the gas supply system. DETAILED DESCRIPTION OF THE INVENTION

[0048] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated. Hereinafter, the present invention will be described in detail.

[0049] <Pyrolysis furnace 100 according to this embodiment> FIG. 1 is a block diagram showing an example of the structure of a pyrolysis furnace 100 according to this embodiment. As shown in FIG. 1, the pyrolysis furnace 100 mainly includes a pyrolysis furnace body 200, a gas supply system 500, and an exhaust system 900. The predetermined raw material used in the pyrolysis furnace 100 is not particularly limited as long as it contains carbon atoms, and is preferably an organic material. Examples of organic materials include natural products such as plants or animals, polymeric compounds such as plastics, or mixtures thereof. The pyrolysis furnace 100 of this embodiment can suitably decompose such raw materials, thereby significantly reducing the volume of the raw material and efficiently converting it into calcium carbonate. Therefore, industrial waste, such as packaging materials used to package food products, can be reduced while being converted into calcium carbonate.

[0050] (Pyrolysis furnace body 200) Fig. 2 is a schematic diagram showing an example of the appearance of the pyrolysis furnace body 200 according to this embodiment, and Fig. 3 is a schematic cross-sectional view showing an example of the internal structure of the pyrolysis furnace body 200 according to this embodiment. Fig. 2(a) shows the pyrolysis furnace body 200 viewed from the front, and Fig. 2(b) shows the pyrolysis furnace body 200 viewed from the side. Fig. 3(a) shows a cross-sectional view taken along line AA, and Fig. 3(b) shows a cross-sectional view taken along line BB.

[0051] (double structure housing) 2 and 3, the pyrolysis furnace body 200 has a double-structure housing mainly consisting of an outer housing 210 and an inner housing 220. The pyrolysis furnace body 200 further includes an opening / closing unit 280 and an exhaust device 290. A gas supply system 500 is provided on the side of the pyrolysis furnace body 200, and an exhaust system 900 is provided on the top of the pyrolysis furnace body 200. The gas supply system 500 and the exhaust system 900 may be disposed in any position. Furthermore, wheels 205 that allow for easy movement are provided at four locations on the bottom of outer housing 210. Note that wheels 205 may be configured to allow steering at two or four locations, and are not limited to four locations, and may be provided at any number of locations, such as three, six, or eight.

[0052] (Outer housing 210) 2 and 3, the outer housing 210 is mainly rectangular and has an opening / closing unit 280 at its top. The top of the pyrolysis furnace body 200 can be opened by rotating a lid 282 of the opening / closing unit 280 around an axis 281. The inner housing 220 is housed inside the outer housing 210. By opening the lid 282, organic matter to be decomposed can be introduced into the inner housing 220 of the pyrolysis furnace body 200. Furthermore, a separate lower lid may be provided below the tube 285 of the pyrolysis furnace body 200, and the lower lid may move in the opposite direction to the opening and closing of the lid 282. That is, a structure may be adopted in which the lower lid is closed when the lid 282 is opened, and the separate lower lid is opened when the lid 282 is closed. In this case, the tube 285 can be used as a buffer, so that organic matter to be decomposed can be safely introduced while the pyrolysis furnace body 200 is operating.

[0053] (inner housing 220) 2 and 3, inner housing 220 mainly comprises rectangular cylindrical portion 221 formed at the top, square truncated pyramid 222 formed at the bottom, and flange portion 223 formed at the top end. Square truncated pyramid 222 formed at the bottom is provided with a plurality of holes 226 that introduce gas supplied from gas supply system 500 (described later) into inner housing 220, and nozzle device 300 for each hole 226. Details of nozzle device 300 will be described later. Furthermore, by accommodating the inner housing 220 inside the outer housing 210, a pipe 215 for supplying gas between the outer housing 210 and the inner housing 220 can be formed. Gas is supplied from a gas supply system 500 (described later) and the gas is supplied into the inner housing 220 via a pipe 215 . In this case, gas is supplied to the organic matter introduced into the inner housing 220 through a plurality of holes 226 and a plurality of nozzle devices 300 provided in the inner housing 220 .

[0054] (Discharge device 290) 2 and 3, the organic matter introduced into the inner housing 220 is decomposed to mainly become calcium carbonate, which is then discharged from the discharge device 290. The discharge device 290 is provided in the longitudinal direction at the bottom of the inner housing 220, and is configured so that the discharged matter is discharged to the outside of the pyrolysis furnace body 200 by rotating the shaft 292 about its axis.

[0055] (Exhaust System 900) Furthermore, as shown in Figures 2 and 3, the exhaust system 900 filters or decomposes the odors and / or smoke generated when decomposing the organic matter introduced into the inner housing 220 and discharges them into the atmosphere. The exhaust system 900 may use multiple filters, activated carbon, or any other device that can absorb or remove odors.

[0056] (Nozzle device 300) FIG. 4 is a schematic diagram showing an example of the inner housing 220 viewed from above, FIG. 5 is a schematic cross-sectional view showing the inner housing 220 taken along line CC, and FIG. 6 is a schematic cross-sectional view showing the inner housing 220 taken along line DD. 7 is a schematic diagram showing an example of the inner housing 220 viewed from above, and FIG. 8 is a schematic cross-sectional view showing an example of the nozzle device 300. As shown in FIG.

[0057] As shown in Figures 4 to 7, inner housing 220 consists of rectangular cylindrical portion 221 formed at the top as described above, quadrangular pyramid 222 formed at the bottom, and flange portion 223 formed at the top end.

[0058] A plurality of holes 226 are formed in a part of the lower side of the rectangular cylindrical portion 221 and in the truncated pyramid 222, and as shown in FIG. 8, a nozzle device 300 is provided for each of the holes 226. In this embodiment, the nozzle device 300 is a 90-degree long elbow of a steel butt-weld pipe joint made of carbon steel and / or alloy steel. That is, the nozzle device 300 has a cylindrical shape bent at 90 degrees. Further, the nozzle devices 300 are welded to the respective holes 226. Note that, although in the present embodiment, the nozzle devices 300 are welded to the holes 226, this is not limitative, and any fixing method such as screw fixing may be used. The nozzle devices 300 and 301 inject air into the inside of the inner housing 220 through a pipe 215 formed by a double-structure housing made up of the inner housing 220 and the outer housing 210 .

[0059] Also, as shown in Figures 5 to 7, most of the nozzle devices 300 have nozzle openings facing vertically downward, but some of the nozzle devices 300 have nozzle devices 301 arranged so that they are at a predetermined angle from the vertically downward. In this embodiment, nozzle devices 301 are provided at the boundary between rectangular cylindrical portion 221 and quadrangular pyramid truncated 222, three at each corner, inclined at 45 degrees outward from inner casing 220. In this embodiment, three nozzles are inclined at 45 degrees each, but this is not limiting, and any number of nozzles such as one, two, four, five, or six may be provided, inclined at any angle such as 10 degrees, 20 degrees, or 30 degrees. Furthermore, it goes without saying that nozzle devices may be provided at angles other than those of the nozzle devices 300 and 301.

[0060] The nozzle devices 300 are arranged so that the pitch between adjacent nozzle devices 300 is 200 mm or less. In this case, the pitch of the nozzle devices 300 refers to the distance between adjacent nozzle devices 300, regardless of whether it is in the vertical or horizontal direction. The pitch between adjacent nozzle devices 300 is preferably 300 mm or less, and more preferably 200 mm or less. In this case, the inner diameter of the nozzle devices 300 is preferably 20 mm or more and 35 mm or less. The nozzle devices 300 are preferably arranged in four or more rows in the vertical direction, and are preferably arranged at a distance of 400 mm or less from the corner of the adjacent inner surface. This allows the thermal decomposition reaction to proceed favorably even when a water-containing organic substance is introduced into the reactor.

[0061] Furthermore, in the inner housing 220 of this embodiment, a thermometer is disposed on each of at least four sides where the nozzle device 300 is disposed, so that the reaction temperature of the organic matter in the furnace can be measured. Specifically, thermometers are arranged in a total of eight locations: two locations on each of the inclined surfaces appearing at the top and bottom in Figure 7 (surfaces forming the truncated quadrangular pyramid 222 inclined on both sides in Figure 5), and two locations on each of the side surfaces appearing at the left and right in Figure 7 (rectangular cylindrical portion 221 appearing on both sides in Figure 6). In this case, it is preferable to arrange multiple thermometers on each surface, separated in the vertical direction, so that the temperatures near the bottom and near the top can be determined. Also, in this embodiment, as described above, an example has been shown in which thermometers are arranged in two locations on the four opposing surfaces of inner housing 220, but this is not limiting, and the number of thermometers may be increased to measure the temperature distribution with higher resolution. This allows for a high-resolution understanding of the temperature distribution throughout the organic material. If any part of the organic material has a reaction temperature that exceeds the optimum value, the reaction temperature of the reaction center in the organic material can be controlled appropriately by reducing the amount of air supplied by the gas supply system 500. In this case, the temperature inside the furnace is preferably set to 100° C. or higher and 400° C. or lower, and more preferably 150° C. or higher and 350° C. or lower. This allows the raw material to be suitably converted into calcium carbonate and also prevents combustion, such as the generation of flames.

[0062] 3(b), the double-headed arrow indicates the depth of the inner casing 220, with the upper end of the arrow indicating the upper end of the inner casing 220 and the lower end of the arrow indicating the bottom of the inner casing 220. The nozzle device 300 of this embodiment is disposed in a region where the depth of the inner casing 220 is 10% to 60% from the bottom, and is also disposed in a region where the depth is at least 30% or more. In other words, by disposing the nozzle device 300 not only in the lower portion 30% or less from the bottom, but also in the middle portion 30% or more (approximately 50% or less) from the bottom, it is possible to supply gas evenly to the entire raw material, and therefore the decomposition reaction can be preferably promoted. The upper end of the area where the nozzle device 300 is provided may be designed appropriately depending on the amount of raw material to be charged.

[0063] (Gas supply system 500) FIG. 9 is a schematic cross-sectional view showing an example of the internal structure of the gas supply system 500, and FIG. 10 is a schematic cross-sectional view taken along line EE showing an example of the arrangement of the magnets 528 of the gas supply system 500.

[0064] As shown in FIGS. 9 and 10, the gas supply system 500 mainly includes a pump 510 for feeding atmospheric air, a conversion box 520 for converting air into gas, and solenoid valves 532 and 533 . As shown in FIG. 9, air is supplied to a conversion box 520 by a pump 510, where the air is subjected to a predetermined treatment, and when an electromagnetic valve 532 is opened, the gas is supplied to the pyrolysis furnace main body 200. On the other hand, when the solenoid valve 533 is opened, the gas containing a large amount of oxygen, which is obtained by removing gases from the air, is released into the atmosphere.

[0065] (Conversion Box 520) As shown in FIG. 10, an air intake port 521, a gas exhaust port 522, and an oxygen exhaust port 523 are formed inside the conversion box 520. Furthermore, a pair of blade members 525, 526 for forming a Tesla valve structure are formed inside conversion box 520. When conversion box 520 is viewed from above, pair of blade members 525 are arranged in a V-shape, and pair of blade members 526 are provided in a continuous V-shape.

[0066] In this embodiment, the Tesla valve structure is formed using a pair of blade members 525, 526, but the present invention is not limited to this and any Tesla valve structure may be used. Furthermore, in this embodiment, it is desirable that turbulence occurs when a predetermined flow velocity is exceeded.

[0067] Furthermore, a plurality of magnets 528 are attached to the pair of blade members 525, and a plurality of magnets 528 are also attached to the pair of blade members 526. A plurality of magnets 528 are also provided on the floor of the conversion box 520. In this embodiment, neodymium magnets are used. However, the magnets are not limited to neodymium magnets, and electromagnets or any other magnets that generate a strong magnetic force can be used.

[0068] It is a well-known fact that oxygen components are generally paramagnetic and are attracted to magnets 528. In this embodiment, by providing a plurality of magnets 528 on the bottom surface of conversion box 520 and on a pair of blade members 525, 526 that form turbulent flow, oxygen components can be attracted from atmospheric air and discharged from oxygen outlet 523. In this embodiment, the gas supplied when converting wastewater into calcium carbonate in the pyrolysis furnace body 200 preferably has an oxygen concentration of 8% or more and 11% or less, more preferably 9.5% or more and 10.5% or less, and the oxygen concentration actually tested was 9.9%.

[0069] That is, while generating turbulence in the Tesla valve structure, the air is given a sufficient magnetic effect, oxygen is discharged from the oxygen outlet 523 by the magnet 528 arranged on the floor of the conversion box 520, and the desired gas is supplied to the pyrolysis furnace main body 200 from the gas outlet 522. As a result, organic matter can be efficiently converted into calcium carbonate in the inner casing 220 of the pyrolysis furnace main body 200.

[0070] In this embodiment, the gas supply system 500 is arranged on the lower side of the pyrolysis furnace main body 200, but in order to prevent thermal effects on the magnet 528, a material that does not conduct heat or the gas supply system 500 may be separately arranged away from the pyrolysis furnace main body 200. Furthermore, in this embodiment, the conversion box 520 is used, but the present invention is not limited to this, and the conversion box 520 may not be used. In other words, atmospheric air may be supplied to the pyrolysis furnace body 200 without using the magnet 528.

[0071] (Operation of pyrolysis furnace 100) Next, the processing operation of decomposing organic matter using the pyrolysis furnace 100 will be described. First, the user opens the opening / closing part 280 of the pyrolysis furnace body 200 of the pyrolysis furnace 100 and puts the target organic matter into the inside of the inner housing 220 through the lid 282. At this time, any material such as an ignition agent for facilitating ignition may be added together with the organic matter.

[0072] Next, the opening and closing section 280 is closed, the pump 510 of the gas supply system 500 is operated, and the organic matter is ignited. In this case, since it is necessary to increase the temperature at which the organic matter itself burns, the air in the atmosphere is supplied directly into the pyrolysis furnace body 200 .

[0073] Next, the temperature of the inner casing 220 of the pyrolysis furnace main body 200 is measured, and the reaction is carried out for 70 hours or more at an internal temperature of the inner casing 220 between 200°C and 400°C, and then the pump 510 is driven to operate the pyrolysis furnace 100. Note that the temperature and time need to be adjusted depending on the moisture content of the organic matter being fed. Next, when the internal temperature of the inner housing 220 reaches 400°C, the amount of air supplied from the pump 510 of the gas supply system 500 is reduced. Here, it is preferable to reduce the amount of air supplied when any of the thermometers provided in the inner housing 220 exceeds a predetermined temperature. In other words, the inventors' experiments have revealed that the pyrolysis reaction of organic matter in the pyrolysis furnace main body 200 does not proceed throughout the organic matter, but rather proceeds locally, mainly in areas with a high carbon content and low water content. Furthermore, it was confirmed that areas with a high water content receive heat from other reaction areas, which promotes drying, and the center of the pyrolysis reaction moves throughout the organic matter, causing the reaction to proceed sequentially within the organic matter.

[0074] Therefore, when the temperature of the entire pyrolysis furnace body 200 or the entire organic matter is controlled, the temperature of a local reaction center may become higher or lower than the desired value, which may result in a decrease in the calcium carbonate recovery rate or a risk of flames occurring in the organic matter.

[0075] On the other hand, when the internal temperature of the inner housing 220 drops to 200°C, the amount of air supplied from the pump 510 of the gas supply system 500 is increased to a predetermined value. This control of the pump 510 is repeated for a predetermined time. By repeating these operations for several hours to several days, the exothermic reaction progresses. After the exothermic reaction is completed, the calcium carbonate is exposed to room temperature for several days to a week, and then removed from the pyrolysis furnace 100 using the discharge device 290.

[0076] (Other operations of pyrolysis furnace 100) Next, another processing operation for decomposing organic matter using the pyrolysis furnace 100 will be described. First, the user opens the opening / closing part 280 of the pyrolysis furnace body 200 of the pyrolysis furnace 100, and then throws the target organic matter into the inside of the inner housing 220 through the lid 282, and the process is the same up to ignition.

[0077] Subsequently, when the internal temperature of the inner housing 220 reaches 450 degrees, the solenoid valve 533 of the gas supply system 500 may be opened to discharge oxygen-rich gas from the oxygen outlet 523 . If the internal temperature of the inner housing 220 subsequently drops to 250°C, the solenoid valve 533 of the gas supply system 500 may be closed. This opening and closing of the solenoid valve 533 may be repeated for a predetermined period of time. After repeating these operations and about one week to ten days has elapsed, the calcium carbonate is removed from the pyrolysis furnace 100 using the discharge device 290. The control of the pump 510 and the control of the electromagnetic valve 533 may be performed alternately, or both or one of them may be performed at a time depending on the organic matter to be introduced.

[0078] (Example) 200 kg of used bags (mainly composed of hemp and polyethylene) that had been used to pack coffee beans were charged into the pyrolysis furnace body 200 as the input raw material, and the bag was heated to 300°C for one day to cause a decomposition reaction. After that, the bag was left at room temperature for three days to cool, and a product was obtained. As a result, it was confirmed that the volume of the input raw material had decreased to 1 / 350. The product thus obtained was analyzed using SEM-EDX (AZtecOne manufactured by Hitachi, Ltd.), and it was found that the elements oxygen, calcium, and carbon were 95% or more by mass, and the product contained 35.8% or more calcium carbonate. Furthermore, the product contained almost no calcium oxide, which confirmed that the input raw materials were not combusted and most of them became calcium carbonate. On the other hand, when a pyrolysis furnace 100 was used in which the nozzle devices 300 were provided only on two surfaces of the inner housing 220 or in which the nozzle devices 300 were disposed only at a depth of 30% or less from the bottom of the furnace, the reaction only proceeded in the raw materials near the nozzles, and the volume of the input raw materials was hardly reduced overall. Also, when the amount of oxygen supplied into the furnace was increased to promote the reaction, the raw materials were carbonized near the nozzle devices 300, and the raw materials could not be suitably converted into calcium carbonate.

[0079] In this embodiment, the outer housing 210 corresponds to the "outer housing", the inner housing 220 corresponds to the "inner housing", the hole 226 corresponds to the "multiple hole portions", the nozzle device 300 corresponds to the "nozzle portion", the pyrolysis furnace 100 corresponds to the "pyrolysis furnace", and the pyrolysis furnace main body 200 corresponds to the "double-structure housing".

[0080] Although a preferred embodiment of the present invention has been described above, the present invention is not limited thereto. It will be understood that various other embodiments can be made without departing from the spirit and scope of the present invention. Furthermore, although the actions and effects of the configuration of the present invention are described in this embodiment, these actions and effects are merely examples and do not limit the present invention. [Explanation of symbols]

[0081] 100 Pyrolysis Furnace 200 Pyrolysis furnace body 210 Outer housing 220 Inner housing 226 holes 300 Nozzle Device

Claims

1. a double-structure housing consisting of an outer housing and an inner housing; a gas supply port that supplies gas to a space formed between the outer casing and the inner casing; a plurality of holes formed in the inner housing; a nozzle portion provided in accordance with the plurality of holes; an input section for inputting predetermined raw materials into the inner housing; an exhaust port for discharging exhaust gas from the double-structure housing, The nozzle portion has a curved cylindrical shape.

2. The nozzle portion is made of a 90-degree elbow pipe joint, 2. The pyrolysis furnace according to claim 1, wherein the gas is injected into the interior of the inner casing and downward from the horizontal.

3. a thermometer disposed on each of at least four surfaces constituting the inner surface of the inner housing; 3. The pyrolysis furnace according to claim 2, wherein the nozzle portions are disposed on at least four surfaces constituting the inner surface of the inner casing, and the pitch between adjacent nozzle portions is 200 mm or less.

4. The inner housing mainly includes a rectangular cylindrical portion and a square support portion having an internal space formed in communication with the rectangular cylindrical portion, The pyrolysis furnace according to claim 1 , wherein the outer housing has a rectangular box shape capable of housing the inner housing therein.

5. The plurality of holes are arranged in a staggered pattern, 2. The pyrolysis furnace according to claim 1, wherein at least 80% of the plurality of nozzle sections have their nozzles arranged vertically downward, and the remaining nozzle sections have their nozzles arranged toward the corners of the inner casing.

6. The pyrolysis furnace according to claim 1 , wherein the plurality of holes are provided in an area of ​​the inner casing whose depth is at least 30% or more from the bottom.

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