Exhaust gas treatment system and organic matter decomposition treatment apparatus comprising the same

Abstract

To provide an exhaust gas treatment system that is capable of efficiently and surely applying detoxification treatment to exhaust gas produced when subjecting organic matters to thermal decomposition treatment, and to provide an organic matter decomposition treatment apparatus comprising the exhaust gas treatment system.SOLUTION: An exhaust gas treatment system includes: a first treatment tank 210 comprising a mixer 1 for dissolving exhaust gas produced when subjecting organic matters to thermal decomposition treatment, in water; a second treatment tank 220 for agitating and mixing water extracted from the first treatment tank 210 and an adsorbent for adsorbing at least dioxins; and a filter 223 for filtering the water in the second treatment tank 220.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an exhaust gas treatment system for treating exhaust gas generated during the thermal decomposition of organic matter, and an organic matter decomposition treatment apparatus equipped with the same. [Background technology]

[0002] A known treatment technology reduces the generation of harmful dioxins and thermally decomposes them at a relatively low temperature by heating organic matter placed in a treatment tank that is shielded from outside air and supplying magnetized air (magnetized air) to the treatment tank in a controlled manner. Another known organic treatment device reduces the dioxin content in the exhaust gas from treating organic matter by burning the exhaust gas after thermal decomposition of the organic matter with magnetized air, performing primary and secondary cooling to reduce the gas temperature to 60°C or below, and then adsorbing the dioxins with activated carbon (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2024-12056 Summary of the Invention [Problem to be solved by the invention]

[0004] The organic matter treatment device uses activated carbon to adsorb dioxins. The activated carbon is packed into the activated carbon container, and as gas passes through the gaps in the activated carbon, the trace amounts of dioxins contained in the gas are adsorbed by the porous structure of the activated carbon. However, if the activated carbon becomes clogged, adsorption will no longer occur.

[0005] The present invention aims to provide an exhaust gas treatment system capable of efficiently and reliably detoxifying exhaust gases generated during the thermal decomposition of organic matter, and an organic matter decomposition treatment device equipped with the same. [Means for solving the problem]

[0006] The exhaust gas treatment system of the present invention includes a first treatment tank equipped with a dissolving device that dissolves in water exhaust gas generated during the thermal decomposition of organic matter, a second treatment tank that stirs and mixes the water removed from the first treatment tank with an adsorbent that adsorbs at least dioxins, and a filter that filters the water in the second treatment tank.

[0007] According to the exhaust gas treatment system of the present invention, exhaust gas generated during the thermal decomposition of organic matter is dissolved in water in the first treatment device, and the exhaust gas dissolved in water comes into sufficient contact with the adsorbent in the second treatment tank. As a result, dioxins contained in the exhaust gas are reliably adsorbed onto the adsorbent and removed together with the adsorbent by the filter.

[0008] The dissolution device can be a mixer that mixes exhaust gas with water by drawing the exhaust gas into a vortex created by supplying water into a container with a circular cross-section. With this mixer, exhaust gas generated during the pyrolysis of organic matter is mixed and stirred by the vortex created by supplying water into a container with a circular cross-section in the first treatment tank, ensuring a sufficient mixing state and dissolving into the water. This allows the exhaust gas dissolved in the water in the second treatment tank to come into sufficient contact with the adsorbent, ensuring that the dioxins contained in the exhaust gas are adsorbed by the adsorbent and then removed by a filter along with the adsorbent.

[0009] Furthermore, it is desirable that the mixer comprises a container having a first chamber with a circular cross section, a first inlet for allowing water to flow into the first chamber as a first fluid in a direction that generates a vortex, a fluid outlet provided on the axis of rotation of the vortex generated in the container, a second chamber into which the fluid ejected from the outlet flows, a fluid supply pipe disposed opposite the outlet and having a second inlet for allowing exhaust gas to flow into the outlet as the second fluid, and a discharge outlet for discharging the mixed fluid in the second chamber, wherein the second chamber has a hollow portion with a circular cross section, the outlet ejects the vortex fluid into the second chamber, and the discharge outlet has an opening for discharging the mixed fluid in a direction that intersects the axis of rotation of the vortex of the mixed fluid in the second chamber.

[0010] As a result, water as a first fluid supplied into the first chamber of the container is guided by the inner circumferential surface of the first chamber, which has a circular cross section, and flows in a swirling manner around the central axis of the first chamber, forming a vortex within the first chamber. The water in the first chamber is then ejected from the ejection port into the second chamber in a vortex state. At this time, when exhaust gas as a second fluid flows in from the fluid supply pipe, a negative pressure area is generated in the center of the vortex, causing a flow in which the water is sucked into the vortex. The water and exhaust gas are then agitated and mixed in the second chamber and ejected from the opening.

[0011] The exhaust gas treatment system of the present invention is also preferably equipped with a heater for incineration as a pretreatment of the exhaust gas to be drawn into the first treatment tank, thereby incinerating the fine particle ash, which is a combustible component remaining in the exhaust gas generated by the thermal decomposition of organic matter, and reducing the volume of the exhaust gas.

[0012] The organic matter decomposition treatment device of the present invention includes a thermal decomposition device that thermally decomposes organic matter and the above-mentioned exhaust gas treatment system. According to the organic matter decomposition treatment device of the present invention, the organic matter is thermally decomposed by the thermal decomposition device, and dioxins contained in the exhaust gas generated by this thermal decomposition treatment are reliably adsorbed onto the adsorbent and removed together with the adsorbent by the filter. [Effects of the Invention]

[0013] (1) According to the exhaust gas treatment system of the present invention, the exhaust gas generated during the thermal decomposition of organic matter comes into sufficient contact with the adsorbent while dissolved in water, so that the dioxins contained in the exhaust gas are reliably adsorbed by the adsorbent and removed together with the adsorbent by the filter, thereby enabling the exhaust gas generated during the thermal decomposition of organic matter to be detoxified efficiently and reliably.

[0014] (2) In a configuration equipped with a heater for incineration as a pretreatment of the exhaust gas to be drawn into the first treatment tank, the fine particle ash, which is a combustible component remaining in the exhaust gas generated by the thermal decomposition of organic matter, is incinerated, and the volume of the exhaust gas is reduced, making it possible to more efficiently and reliably detoxify the exhaust gas generated during the thermal decomposition of organic matter. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic configuration diagram of an organic matter decomposition treatment device equipped with an exhaust gas treatment system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing the mixer of FIG. [Figure 3] FIG. 3 is a perspective view showing a discharge unit used in the mixer of FIG. 2. [Figure 4] FIG. 4 is a front view showing the discharge unit of FIG. 3. [Figure 5] FIG. 3 is an explanatory diagram for explaining the assembly of the mixer of FIG. 2. [Figure 6] FIG. 3 is an explanatory diagram for explaining the assembly of the mixer of FIG. 2. [Figure 7] 3 is an explanatory diagram for explaining the flow of fluid in the mixer of FIG. 2 and for explaining the operation of the mixer. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] FIG. 1 is a schematic diagram of an organic matter decomposition treatment device equipped with an exhaust gas treatment system according to an embodiment of the present invention.

[0017] 1, an organic matter decomposition treatment apparatus according to an embodiment of the present invention comprises a pyrolysis apparatus 100 that thermally decomposes organic matter, and an exhaust gas treatment system 200 that treats the exhaust gas (flue gas) generated by the pyrolysis apparatus 100. The organic matter treated by the pyrolysis apparatus 100 includes petroleum products (plastics, polystyrene foam, plastic bags, vinyl, trays, etc.), food waste and food residue, paper products (magazines, catalogs, etc.), trees (garden trees, branches, sawdust, dismantled wood, etc.), fishery and fishing waste (fish bones, fishing nets, etc.), livestock waste (horse manure, cow manure, barn straw, etc.), fabric products (clothing, stuffed toys, etc.), medical waste (disposable diapers, pet sheets, etc.), etc.

[0018] The pyrolysis device 100 has a pyrolysis furnace 110 that thermally decomposes organic matter under low-oxygen conditions. The pyrolysis furnace 110 can be sealed off from outside air by an inner lid 111. The pyrolysis device 100 also has an air inlet 112 that supplies magnetized air (magnetic air) into the pyrolysis furnace 110. The organic matter to be treated by the pyrolysis device 100 is introduced into the pyrolysis furnace 110 through an inlet 113 and is sealed off from outside air by the inner lid 111. The organic matter may be crushed in advance by a crusher (not shown) and then introduced into the inlet 113 by a belt conveyor (not shown). The inner lid 111 may also be automatically closed after the organic matter is introduced.

[0019] In the pyrolysis device 100, the pyrolysis furnace 110 is constantly maintained at a critical oxygen level of 8% or less, and magnetized air is supplied through the air inlet 112 in a controlled manner. This allows the added organic matter to be pyrolyzed in a steaming state at around 400°C, without contact with the outside air and in a flameless manner, producing charcoal. Specifically, the moisture in the organic matter is weakly electrolyzed by magnetic force to generate hydrogen ions and hydroxide ions. These hydrogen ions and hydroxide ions then collide, generating heat, and pyrolysis begins in a critical oxygen state. The organic matter is then further chemically decomposed by the magnetic fluid, ultimately decomposing it into ash at 1 / 200 to 1 / 400 of its original size. A pilot flame is required to initiate pyrolysis, but if organic matter is added continuously, a pilot flame is only required the first time.

[0020] The exhaust gas treatment system 200 has a first treatment tank 210 that dissolves the exhaust gas (exhaust smoke) from the thermal decomposition device 100 in water, and a second treatment tank 220 that stirs and mixes an adsorbent with the water in which the exhaust gas has been dissolved. The exhaust gas from the thermal decomposition device 100 is sucked in through a suction port 201 provided below the inner lid 111 of the thermal decomposition furnace 110, and is sent to the first treatment tank 210 through a pipe 202. A heater 203 is provided midway along the pipe 202. The heater 203 incinerates the exhaust gas as a pretreatment step for the exhaust gas to be sucked into the first treatment tank 210. An electric heater, for example, can be used as the heater 203.

[0021] The first treatment tank 210 has a plurality of mixers 1 as dissolution devices that dissolve exhaust gas in water. Pipe 202 branches and is connected to each mixer 1. The first treatment tank 210 is filled with water. The mixer 1 is a container with a circular cross section that is supplied with water, and the exhaust gas is drawn into a vortex that is generated, thereby stirring and mixing the exhaust gas with the water. The specific configuration of the mixer 1 will be described later.

[0022] The second treatment tank 220 is a tank where an adsorbent agent for adsorbing dioxins is added to the water removed from the first treatment tank 210 and agitated and mixed. The second treatment tank 220 is equipped with an agitator 221. The water in the first treatment tank 210 is sucked by a first pump 222 and sent to the second treatment tank 220. In addition, the bottom of the second treatment tank 220 is equipped with a filter 223 that filters the water in the second treatment tank 220. The water filtered by the filter 223 is temporarily stored in a tank 230 located below and then discharged.

[0023] In the exhaust gas treatment system 200 configured as described above, exhaust gas generated when organic matter is thermally decomposed in the thermal decomposition device 100 is dissolved in water in the first treatment device 210, and the exhaust gas dissolved in water comes into sufficient contact with the chemical in the second treatment tank 220. As a result, dioxins contained in the exhaust gas are reliably adsorbed by the chemical and removed together with the chemical by the filter 223, and the exhaust gas is efficiently and reliably detoxified.

[0024] The exhaust gas treatment system 200 also includes a heater 203 that incinerates the exhaust gas as a pretreatment for the exhaust gas to be drawn into the first treatment tank 210. This incinerates particulate ash, a combustible component remaining in the exhaust gas generated by the thermal decomposition of organic matter, thereby reducing the volume of the exhaust gas. This makes it possible to more efficiently and reliably detoxify the exhaust gas generated during the thermal decomposition of organic matter.

[0025] Next, a specific configuration of the mixer 1 will be described. Fig. 2 is a cross-sectional view showing the mixer of Fig. 1, Fig. 3 is a perspective view showing a discharge unit used in the mixer of Fig. 2, Fig. 4 is a front view showing the discharge unit of Fig. 3, Fig. 5 is an explanatory diagram for explaining the assembly of the mixer of Fig. 2, Fig. 6 is an explanatory diagram for explaining the assembly of the mixer of Fig. 2, and Fig. 7 is an explanatory diagram for explaining the flow of fluid in the mixer of Fig. 2 and for explaining the operation of the mixer.

[0026] As shown in FIG. 2, the mixer 1 includes a container (main body) 10 having a hollow portion and a circular cross section, and a discharge unit (lid) 30 that is detachably attached to the container.

[0027] The container 10 includes a central cylindrical portion 11, a hemispherical one end portion 12 formed at one end of the hollow portion 10a, an other end portion 13 formed at the other end of the hollow portion 10a, and a hollow portion (internal space) 10a surrounded by these. The container 10 also includes an inlet 21 used to supply a first fluid R1 into the hollow portion 10a, an outlet (spout) 22 through which the fluid R1 in the container 10 flows out, a pipe portion 23 that guides the fluid R1 in the container 10 to the outlet 22, a support portion 24 that supports the pipe portion 23, and an attachment portion 25 used to attach the discharge unit 30.

[0028] The cylindrical portion 11, one end 12, and arc-shaped portion 13b have a circular (cylindrical) cross-sectional shape in an orthogonal cross section perpendicular to the central axis 10x of the container 10. In other words, the configuration of the cylindrical portion 11, one end 12, and the other end 13 can be said to be axially symmetric with respect to the central axis 10x of the container 10.

[0029] The other end portion 13 includes a flat other end surface 13a and an arc-shaped portion 13b between the other end surface 13a and the cylindrical portion 11. The arc-shaped portion 13b is a portion that smoothly connects the inner circumferential surfaces of the cylindrical portion 11 and the other end surface 13a.

[0030] One end 12 of the semicircular arc shape has an opening part 14 attached to one end of the end. Opening part 14 has a cylindrical part 14a fixed to the one end and a plug part 14b detachably attached to cylindrical part 14a. The tubular portion 14a has a cylindrical shape and is formed so that the position of its central axis coincides with the position of the central axis 10x of the container 10. Furthermore, the end of the tubular portion 14a on the inner side of the container protrudes toward the internal space 10a of the container 10. This allows the flow path of the fluid R1 flowing inside the container 10 to be in an optimal state (see F3 in FIG. 7). When the stopper portion 14b is attached to the cylindrical portion 14a, the cylindrical portion 14a is sealed. When the stopper portion 14b is removed, a desired fluid can be supplied to the internal space 10a of the container 10 by connecting a fluid supply hose or the like to the cylindrical portion 14a.

[0031] The inlet 21 includes an inlet 21a for the liquid to be introduced into the container, and a cylindrical inflow portion 21b for introducing the fluid R1 toward the inlet 21a. The inlet 21b is made of a tubular member (cylindrical member). The inlet 21b guides the fluid R1 (see F2 in FIG. 7) into the container so that the fluid R1 (see F1 in FIG. 7) flows along the inner circumferential surface of the container 10. The fluid R1 that flows into the container flows in a swirling manner around the central axis 10x of the container 10 (see F2 in FIG. 7). In other words, the inlet 21 allows the fluid R1 to flow into the hollow portion (first chamber) 10a of the container 10 in a direction that generates a vortex. To achieve this flow, inlet section 21b is arranged so that the outermost edge of inlet section 21b, located farthest from central axis 10x of container 10, extends in the normal direction to the outer circumferential surface of cylindrical section 11 of container 10. For this reason, the opening of inlet 21a on the inside of the container is elliptical. In other words, inlet section 21 is arranged so that its central axis 21y does not intersect with central axis 10x of container 10. Inlet section 21b is arranged so that both central axes 10x, 21y are in a so-called twisted position relationship. Furthermore, central axis 21y of inlet section 21b is perpendicular to central axis 10x of container 10 (if either one is translated to intersect, they will be perpendicular).

[0032] The inlet 21a is formed in the cylindrical portion 11. The position of the central axis 21y of the cylindrical inlet 21a is closer to the other end 13 than an intermediate position 11m (see FIG. 7) in the direction of the central axis 10x of the portion of the cylindrical portion 11 adjacent to the internal space 10a, i.e., closer to the outlet 22. Furthermore, the entire inlet 21a (the end position 21e of the inlet 21a on one end 12 side) is closer to the other end 13 than an opening 23a at the tip of the pipe portion 23 described below, i.e., closer to the outlet 22.

[0033] Outlet 22 is a circular opening and is formed on the other end side (other end surface) 13 of container 10. The pipe portion 23 is a member that guides the fluid toward the outlet 22, which is an outlet for the liquid in the container (see F5 in FIG. 7). The pipe portion 23 is made of a cylindrical pipe material. An opening at the base end of the pipe portion 23 located on the other end surface 13 is connected to the outlet 22. An opening 23a at the tip end opposite to the base end is arranged to be positioned in the hollow portion 10a inside the container. The outlet 22 and the pipe portion 23 are formed in the center of the other end face 13. In other words, the outlet 22 and the pipe portion 23 are provided at a position where their central axes coincide with the central axis 10x of the container 10, that is, on the rotation axis of the vortex generated inside the container 10. Furthermore, the position of opening 23a at the tip end is located closer to one end side 12 of container 10 (farther from the other end side 13) than inlet 21a of inlet 21. In other words, pipe portion 23 is provided such that opening 23a at the tip end protrudes into container internal space 10a from the outlet located at the other end face 13 toward one end side 12 of container 10. Therefore, the fluid introduced into the container from the inlet 21a flows in a swirling manner and flows into the tube section 23 from the opening 23a at the tip of the tube section 23 (see F3 and F4 in Figure 7), is guided to the tube section 23 (see F5 in Figure 7), and flows out of the container 10 from the outlet 22 (see F6 in Figure 7). As will be described later, the outlet 22 is used as an outlet for the fluid inside the pipe portion 23. The fluid flowing out from the outlet 22 is a vortex flow, and flows while swirling inside the cylindrical internal space of the attachment portion 25, which will be described later.

[0034] The attachment portion (outer peripheral wall portion) 25 is formed on the outer side of the other end surface 13a of the container 10, which is the other end side. Mounting portion 25 has a cylindrical shape (with a circular cross section) and is formed so that the position of its central axis coincides with the position of central axis 10x of container 10. In addition, the diameter (inner diameter) of mounting portion 25 is larger than the diameter (opening diameter, inner diameter) of outflow port 22, and mounting portion 25 is disposed so as to surround outflow port 22. The attachment portion 25 has a male thread portion 25a formed on its outer circumferential surface, and a female thread portion 41a formed on the inner surface of the outer circumferential portion 41 of the discharge unit 30 (described later) can be screwed into it.

[0035] The support portion 24 is a disk-shaped member disposed in the internal space of the container 10, and has a hole formed in the center. The center of the support part 24 is also fixed with the pipe part 23 inserted through the hole. The circular outer periphery of the support part 24 is fixed to the inner circumferential surface of the cylindrical part 11. The connection part between the support part 24 and the outer circumferential surface of the pipe part 23 and the connection part between the support part 24 and the inner circumferential surface of the cylindrical part 11 are fixed in a sealed state so that no fluid flows into the space 24s on the other end side of the support part 24. Therefore, the hollow part (internal space) 10a referred to here is the actual space through which the fluids to be mixed flow, i.e., the internal space (space surrounded by the portion of the cylindrical part 11 with a length 11L) that extends from the support part 24 to the one end 12 side (left side in Figure 2) (see Figure 7).

[0036] The length 12L of the semicircular end 12 along the central axis 10x is shorter than the length 11L of the cylindrical portion 11 along the central axis (see FIG. 7). The volume of the internal space of the one end 12 is smaller than the volume of the internal space of the cylindrical portion 11 (the volume enclosed by the portion with the length 11L).

[0037] The discharge unit 30 comprises a unit main body 40 having a cylindrical outer peripheral portion 41 and an end face portion 42 formed at one end of the outer peripheral portion, and a cylindrical body (fluid supply pipe) 50 that can be attached and detached to the unit main body 40. The other end of the outer circumferential portion 41 of the unit body 40 forms an opening 43. A female screw portion 41a is formed on the inner circumferential surface of the outer circumferential portion 41 of the unit body 40. When the opening 43 of the unit body 40 is screwed into the mounting portion (outer circumferential wall portion) 25 of the container 10, the female screw portion 41a of the unit body 40 and the male screw portion 25a of the mounting portion 25 of the container 10 are screwed together, and the discharge unit 30 is detachably attached to the container 10. As a result, a hollow portion (second chamber) 25b having a cylindrical cross section is formed, surrounded by the mounting portion 25 and the discharge unit 30. The fluid ejected from the outlet (ejection port) 22 flows into this second chamber 25b.

[0038] An outer convex portion 44 and an inner convex portion 45 are formed in the center of the end surface portion 42 of the unit body 40, and a through portion 46 is formed in the center of both convex portions. The through-hole (fluid supply pipe) 46 is used as an inlet for the other fluid (second fluid) R2 to be mixed, as will be described later. As shown in FIG. 3, the through-hole 46 is a hollow passage with a circular cross section that passes through the end surface 42 of the unit body 40, and the openings at both ends are circular. 2, the through portion 46 is disposed so that its central axis coincides with the central axis of the cylindrical outer peripheral portion 42 (the central axis 10x of the container 10). A female screw portion 45a used for attaching the cylindrical body 50 is formed on the inner peripheral surface of the inner convex portion 45. In addition, the space 49 (part of the second chamber 25b) between the outer peripheral surface of the inner convex portion 45 and the inner peripheral surface of the outer peripheral portion 41 of the unit main body 40 is used as a flow space 49 for the mixed fluid flowing from the opposing area S1 described later toward the discharge ports 47, 48 described later.

[0039] 5, a male thread portion 50a is formed on the outer peripheral surface of one end of the cylindrical body 50. When the male thread portion 50a is screwed into the female thread portion 45a of the inner convex portion 45 of the unit body 40, the cylindrical body 50 is detachably attached to the unit body 40. At this time, the cylindrical body 50 is attached with its central axis coinciding with the central axis 10x of the outer peripheral portion 41. The cylindrical body 50 is attached in a state where a tip opening (second inlet) 50b, which is the other end, protrudes from the opening 43 of the unit body 40 to the outside of the unit body 40.

[0040] As will be described later, the tip opening 50b of the cylindrical body 50 is used as an inlet (second inlet) for the other fluid R2 to be mixed. The tip opening 50b of the cylindrical body 50 attached to the unit main body is disposed at a position opposite to the outlet 22 of the container 10 when the unit main body 40 is attached to the container 10. As described above, the cylindrical body 50 is attached by screwing, so the distance in the central axis direction between the outlet 22 and the tip opening 50b of the cylindrical body 50 can be adjusted (changed) by adjusting the amount of screwing of the cylindrical body 50, or by preparing multiple types of cylindrical bodies 50 of different lengths and selecting the length of the cylindrical body 50 to be attached. The outlet 22 of the container 10 and the tip opening 50b of the cylindrical body 50, which face each other, are positioned at a distance from each other, and an opposing area S1 (see Figure 7) described below is formed between the outlet 22 of the container 10 and the tip opening 50b of the cylindrical body 50.

[0041] In this embodiment, the inner diameter of the tip opening (second inlet) 50b of the cylindrical body 50 is the same as the inner diameter of the outlet (jet outlet) 22, but may be a different diameter, such as smaller or larger than the inner diameter of the outlet 22. For example, the outer diameter of the tip opening 50b of the cylindrical body 50 may be the same as the inner diameter of the outlet 22, and the inner diameter of the tip opening 50b of the cylindrical body 50 may be smaller than the inner diameter of the outlet 22. As described above, in this embodiment, the cylindrical body 50 is detachably attached and has a replaceable configuration. Therefore, for example, if multiple types of cylindrical bodies 50 with different inner diameters and outer shapes are prepared and it is possible to select the diameter size of the cylindrical body 50 to be attached, the inner diameter and outer diameter of the tip opening 50b of the cylindrical body 50 can be adjusted (changed) by selecting the cylindrical body 50 to be attached.

[0042] As shown in FIG. 3, the unit body 40 has discharge ports 47 and 48. In this embodiment, the discharge unit 30 has multiple types (specifically, two types) of discharge ports 47, 48, and each type of discharge port 47, 48 is formed in multiple numbers, and is formed and arranged axially symmetrically around the central axis (rotation axis) 10x, as shown in Figure 4.

[0043] The first discharge port 48 is formed at a boundary (corner) where the end surface 42 and the outer periphery 41 of the unit body 40 meet. In other words, the first discharge port 48 is formed at a position straddling the end surface 42 and the outer periphery 41 of the unit body 40. In other words, the first discharge port 48 has an opening in which an axial opening 48a formed in the end surface 42 and a radial opening 48b formed in the outer periphery 41 are integrally connected. Therefore, the fluid flow F8 (see Figure 7) discharged from the axial opening 48a of the first outlet 48 is in the same direction as the central axis 10x, and the fluid flow F9 discharged from the radial opening 48b of the first outlet 48 is in the radial direction of the central axis 10x. As described above, the opening of the first discharge port 48 is an opening in which the axial opening 48a and the radial openings 48b are integrally connected, and therefore a portion of the mixed fluid discharged from the first discharge port 48 is discharged as an oblique flow F10 formed by combining the direction of the central axis 10x and the radial direction. In this way, the first discharge port 48 can discharge the mixed fluid in the second chamber in the directions F9 and F10 described above. In other words, the first discharge port 48 can discharge the mixed fluid in the second chamber in the directions F9 and F10 that intersect with the swirl axis 10x of the vortex flow.

[0044] The second discharge port 47 is formed in the end surface portion 42 of the unit body 40 . That is, the second outlet 47 opens in the same direction as the central axis 10x of the unit body 40. Therefore, the flow F11 (see FIG. 7) of the fluid discharged from the second outlet 47 is directed in the same direction as the central axis 10x.

[0045] Next, the assembly of the mixer 1 will be described.

[0046] As described above, the mixer 1 includes the container 10 and the discharge unit (lid) 30. The discharge unit 30 is made up of a unit main body 40 and a cylindrical portion 50 (see FIG. 5). Therefore, first, the cylindrical portion 50 is attached to the unit main body 40 (see FIG. 6). As a result, a fluid supply pipe is formed by the through portion 46 and the cylindrical body 50. In other words, the discharge unit 30 has a configuration having an integrally formed fluid supply pipe. Next, the assembled discharge unit (lid) 30 is attached to the container 10. In this way, the mixer 1 is assembled (see FIG. 2). The discharge unit 30 is attached so that the central axis 10x of the cylindrical body 10 coincides with the central axis 10x of the container 10.

[0047] Furthermore, when the discharge unit 30 is attached to the container 10, a flow path space S is formed between the inner surface of the attachment portion 25 and the outer surface of the cylindrical body 50, and a second chamber is formed surrounded by the attachment portion (outer wall portion) 25 and the discharge unit (lid body) 30. The flow path space S (see Figure 7) has an opposing area S1 described later, an outer area S2 radially (centrifugally) outward from the opposing area S1, and a flow area S3 between the inner surface of the mounting portion 25 and the outer surface of the cylindrical body 50. In this embodiment, the second chamber is composed of a flow path space S and a flow space 49.

[0048] Furthermore, when the discharge unit 30 is attached to the container 10, the outlet 22 of the container 10 and the tip opening (second inlet) 50b of the cylindrical body 50 of the discharge unit 30 are positioned to face each other. The outlet 22 is an outlet for ejecting the first fluid (vortex flow) R1, and the tip opening 50b of the cylindrical body 50 is a second inlet for allowing the second fluid R2 to flow into the second chamber. The ejection port 22 and the second inlet 50b are disposed at positions spaced apart from each other, and an opposing area S1 is formed between the ejection port 22 and the second inlet 50b. The mixed fluid that flows from the facing area S1 to the outer area S2 on the outer side in the centrifugal direction flows into the flow area S3, and further flows into the flow space 49 of the discharge unit 30, and is discharged from the discharge ports 47, 48 to the outside of the mixer 1.

[0049] Furthermore, when screwing the cylindrical body 50 into the female thread portion 45a of the inner convex portion 45 of the unit body 40, the position of the tip opening 50b of the cylindrical body 50 (the length of protrusion from the opening of the unit body 40) can be adjusted by adjusting (changing) the amount of screwing. Furthermore, the position of the tip opening 50b can also be adjusted by preparing multiple types of cylindrical bodies 50 with different lengths and selecting the length of the cylindrical body 50 to be attached. By adjusting the position of the tip opening 50b, with the discharge unit 30 attached to the container 10, the distance in the central axis direction between the outlet 22 and the tip opening 50b of the cylindrical body 50 is adjusted (changed).

[0050] The assembled mixer 1 has a first pipe P1 (see FIG. 7) connected to its inlet 21, a first pump (not shown) that supplies water in a first treatment tank 210 as a first fluid R1 to the container 10 via the first pipe P1, and a second pipe P2 connected to the through-hole 46 of the discharge unit 30. The second pipe P2 is a pipe branched off from the pipe 202. That is, in the mixer 1, liquid water (first fluid) R1 is mixed with smoke (exhaust gas) (second fluid) R2, which is gas generated by the thermal decomposition of organic matter.

[0051] Specifically, a mixer 1 and a second pump (not shown) are installed inside the first treatment tank 210. At this time, an intake port (not shown) of the first pipe P1 connected to the inlet 21 is placed inside the first treatment tank 210. In addition, an intake port of the second pipe P2 connected to the through-hole 46 is connected to the pipe 202. Water is then stored in the first treatment tank 210. As a result, the intake port of the first pipe P1 is placed underwater. In this state, the pyrolysis device 100 is operated to start the pyrolysis treatment of the organic matter.

[0052] In addition, the second pump is operated, whereby the water R1 in the first treatment tank 210 is supplied into the container 10 of the mixer 1 (see F1 in FIG. 7).

[0053] 7, water R1 supplied into container 10 is guided by the inner circumferential surface of cylindrical container 10 and flows in a swirling manner around central axis 10x of container 10. At this time, the flow of water R1 inside container 10 is a vortex F2, and the vortex axis coincides with central axis 10x. Then, water R1 in container 10 flows toward one end 12 in a vortex state, then flows F3 toward the tip opening 23a of pipe section 23, and flows into pipe section 23 in a vortex state F5. When one end 12 is configured to have a semicircular arc shape, it is thought that the flow toward one end 12 reduces the diameter of vortex F2 and increases the flow rate. At this time, smoke R2, which is the second fluid, flows into the cylindrical body 50 from the through-hole 46, passes through the opposing area S1, and generates a flow F21 in which the smoke R2 is sucked into the vortex flow F5 of the water R1 inside the pipe section 23. It is believed that a negative pressure region is generated in the center of the vortex flow F5 inside the pipe section 23. It is believed that the water R1 and smoke R2 are mixed within the pipe section 23 and in the opposing area S1, and are then agitated and mixed in the subsequent flow paths of the outer area S2, the flow area S3, and the flow space 49. Furthermore, the outlet 22 and the second inlet 50b both have relatively large diameters, and are configured to minimize clogging even with fluids containing particulate or powder components, making them highly versatile.

[0054] The vortex flow F5 of the mixed fluid generated by mixing the water R1 and the smoke R2 flows in a vortex state from the pipe portion 23 to the facing area S1, and then flows to the outer area S2, the flow area S3, and the flow space 49. The mixed fluid is then ejected from the discharge ports 47 and 48 of the discharge unit 30. When the mixed fluid is ejected from the outlets 47 and 48, it is mixed more reliably by the action at the outlets.

[0055] The flow of the mixed fluid immediately before being ejected from the discharge ports 47, 48 can be considered as being divided into a swirling flow component that constitutes the vortex flow F6 and an axial flow component F7 in the axial direction of the mixing unit. The mixed fluid ejected from the second outlet 47 is discharged from the second outlet 47 in the same direction as the central axis 10x. This ensures that the discharge flow F11 is in the same direction as the central axis 10x. The discharge amount from the second outlet 47 is smaller than the discharge amount from the first outlet 48, so it can also be called an auxiliary discharge hole.

[0056] On the other hand, the first discharge port 48 has an axial opening 48a formed in the end surface 42 of the discharge unit 30 and radial openings 48b formed in the outer circumferential portion 41, and is discharged in various directions. The mixed fluid is discharged in the same direction as the central axis 10x from the axial opening 48a of the first discharge port 48.

[0057] The mixed fluid is then discharged in the radial directions radiating from the central axis 10x from the radial openings 48b of the first discharge ports 48. As described above, the mixed fluid is a vortex immediately before being discharged, and therefore, the vortex F6 of the mixed fluid that reaches the radial openings 48b of the first discharge ports 48 is subjected to the action of centrifugal force and is discharged outward in the radial direction F9 from the openings 48b. Furthermore, at the radial openings 48b, the action of the opening edges and the like that form the openings 48b causes a shearing action on the flow of the mixed fluid, thereby more reliably mixing the mixed fluid.

[0058] Furthermore, from the opening portion of the first discharge port 48 located at the corner of the unit body 40 where the axial opening portion 48a and the radial opening portion 48b are connected, the mixed fluid is discharged in an oblique flow F10 that is a combination of the radial and axial flows. The mixed fluid discharged in an oblique direction is subjected to the action of the axial flow in addition to the action of the vortex flow and centrifugal force, and is discharged with force from the corner opening of the first discharge port 48. Furthermore, like the mixed fluid discharged from the radial openings 48b, the mixed fluid discharged from the corner of the first discharge port 48 is also subjected to a flow shearing action by the action of the opening edge of the first discharge port 48, etc., so that the mixed fluid is mixed more reliably. Note that the mixed fluid discharged from the corner of the first discharge port 48 is a flow that is subjected to more complex forces, and it is thought that the mixing action due to shearing is more effective.

[0059] As described above, the mixer 1 of this embodiment has the openings 48b formed on the outer periphery of the discharge unit 30, and in this respect, it has better mixing performance. Furthermore, this mixer 1 has a first discharge port 48 that opens at a corner of the discharge unit 30, and in this respect, the mixer 1 has even better mixing performance.

[0060] In this embodiment, the opening area of ​​the second discharge port 47 is smaller than the opening area of ​​the first discharge port 48. Furthermore, the shape of the opening of the first discharge port 48 is not limited to the shape of this embodiment. A configuration that produces a shearing effect on the discharged mixed fluid can be adopted. If the mixed fluid can be sheared, it is thought that a large number of fine turbulences and vortices can be generated downstream of the shearing position, which contributes to more reliable mixing. The first discharge port 48 of the discharge unit 30 may be, for example, a unit having only an opening 48b formed in the outer circumferential portion 41 of the unit body 40. The discharge unit 30 may not be provided with the second discharge port 47.

[0061] As described above, in the mixer 1 of this embodiment, water is supplied into the container 11 having a circular cross section, and the exhaust gas is drawn into the generated vortex, thereby stirring and mixing the exhaust gas with the water. With this mixer 1, the exhaust gas generated during the thermal decomposition treatment of organic matter is mixed and stirred by the vortex in the first treatment tank 210, thereby ensuring a sufficient mixing state and dissolving into the water. As a result, the exhaust gas dissolved in the water in the second treatment tank 220 comes into sufficient contact with the adsorbent, and dioxins contained in the exhaust gas are reliably adsorbed by the adsorbent and removed together with the adsorbent by the filter 223.

[0062] In the above embodiment, the mixer 1 has been described as an example of a dissolving device for dissolving exhaust gas in water, but the device is not limited to the mixer 1 and may be anything that can dissolve exhaust gas in water. In addition, in the second treatment tank 220, a chemical is added to the water as an adsorbent that adsorbs dioxins, but any adsorbent that adsorbs at least dioxins will suffice, and adsorbents that adsorb other substances may also be added. [Industrial Applicability]

[0063] The present invention is useful as an exhaust gas treatment system for treating exhaust gases generated during the pyrolysis of organic matter such as petroleum products (plastics, styrofoam, plastic bags, vinyl, trays, etc.), food waste and food residue, paper products (magazines, catalogs, etc.), trees (garden trees, branches, sawdust, dismantled wood, etc.), fishery and fishing waste (fish bones, fishing nets, etc.), livestock waste (horse manure, cow manure, barn straw, etc.), fabric products (clothing, stuffed toys, etc.), and medical waste (disposable diapers, pet sheets, etc.), and as an organic matter decomposition treatment device equipped with the same. [Explanation of symbols]

[0064] 100 Pyrolysis equipment 110 Pyrolysis Furnace 111 Inner lid 112 Air supply port 113 Inlet 200 Exhaust Gas Treatment System 201 Suction port 202 Piping 203 Heater 210 First treatment tank 220 Second treatment tank 221 Stirring device 222 First Pump 223 filters 230 Tank 1 mixer 10 Container (main body) 10a Hollow part (1st chamber, internal space) 10x central axis (swivel axis) 11 Cylindrical part 11L Length of the cylindrical part 11m intermediate position 12 One end 12L Length of one end 13 Other end 13a Other end surface 13b Arc-shaped portion 14 Opening 14a Cylinder part 14b Plug part 21 Inlet 21a Entrance 21b Inlet 21y center axis 22 Outlet (spout) 23 Pipe section 23a Tip opening 24 Support part 24s space 25 Mounting section (outer wall) 25a Male thread part 25b Hollow part (2nd chamber) 30 Discharge unit (lid) 40 Unit body 41 Outer periphery 41a Female thread 42 End section 43 Aperture 44 Outer protrusion 45 Inner convex part 45a female thread 46 Penetration part (fluid supply pipe) 47 2nd outlet 48 1st outlet 48a Axial opening 48b Radial opening 49 Fluid Space (Room 2) 50 Cylindrical body (fluid supply pipe) 50a male thread 50b Tip opening (second inlet) F1~F11,F21 Fluid flow P1 First piping P2 Second piping R1 One fluid (first fluid) R2 the other fluid (second fluid) S Flow path space (second chamber) S1 Opposite area S2 outer area S3 Flow Area

Claims

1. a first treatment tank equipped with a dissolving device for dissolving exhaust gas generated during the thermal decomposition treatment of organic matter into water; a second treatment tank in which the water removed from the first treatment tank and an adsorbent capable of adsorbing at least dioxins are mixed by stirring; a filter for filtering the water in the second treatment tank; An exhaust gas treatment system including:

2. The exhaust gas treatment system according to claim 1, wherein the dissolution device is a mixer that mixes the exhaust gas with the water by supplying water into a container having a circular cross section and drawing the exhaust gas into a vortex that is generated.

3. 2. The exhaust gas treatment system according to claim 1, further comprising a heater for incinerating the exhaust gas as a pretreatment for the exhaust gas to be drawn into the first treatment tank.

4. The mixer comprises: the container having a first chamber with a circular cross section; a first inlet that allows the water to flow as a first fluid into the first chamber in a direction that generates a vortex; a fluid outlet provided on the axis of rotation of a vortex generated in the container; a second chamber into which the fluid ejected from the ejection port flows; a fluid supply pipe disposed opposite the ejection port and having a second inlet through which the exhaust gas flows as a second fluid toward the ejection port; a discharge port for discharging the mixed fluid in the second chamber, the second chamber has a hollow portion having a circular cross section, The ejection port ejects a vortex fluid toward the second chamber, The discharge port has an opening for discharging the mixed fluid in a direction intersecting the swirl axis of the vortex flow of the mixed fluid in the second chamber. The exhaust gas treatment system according to claim 2 .

5. a pyrolysis device for pyrolyzing organic matter; The exhaust gas treatment system according to any one of claims 1 to 4, An organic matter decomposition treatment device comprising:

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