Purifier

Abstract

To provide a purifier.SOLUTION: There is provided a purifier which is configured to: send treatment liquid stored in an intermediate part 300 to a nozzle; collect the treatment liquid ejected from the nozzle to the intermediate part 300; and circulate the treatment liquid for using the same. A first processing part comprises: a lateral duct part whose cross section is formed in a square shape and whose shaft extends laterally; a first nozzle provided in the lateral duct part; and a first porous air ventilation part 60 which is provided in the lateral duct part at a downstream side of the first nozzle. A second processing part has a cylindrical cylinder main body part whose shaft extends vertically, and whose upper end opening is coupled to the first processing part. The intermediate part has a channel formation part 311 on which a rectangular opening is provided on its upper part, and which is formed in a rectangular solid shaped container whose height is set to become smaller than a dimension of a long side edge of the opening, a deep part 312' which is formed by making a part of the bottom of the channel formation part hollow downward, relative to other parts on the bottom part, as a deep part, and is formed in a small container state whose volume is smaller than that of the channel formation part for storing the processing fluid therein, and an intermediate residual amount reduction part 340 provided in the channel formation part and through which the processed air processed on the upstream part passes.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] This invention relates to the structure of an air purification device. [Background technology]

[0002] It has been conventionally known that a treatment device that sprays a treatment liquid onto the air to remove foreign matter contained in the air is used as an air purification device when exhausting air from inside a factory to the outside.

[0003] Figure 18 is a schematic diagram showing a conventional processing apparatus 900. The processing apparatus 900 comprises a liquid reservoir 920 configured as a rectangular parallelepiped for containing a processing liquid 910, a processing cylinder 930 and a discharge cylinder 940 provided on the top plate 921 of the liquid reservoir 920, and a pump 950 that sends the processing liquid 910 from the liquid reservoir 920 to a nozzle 951 provided inside the processing cylinder 930. The processing apparatus 900 sends air from the upper end of the processing cylinder 930 into the liquid reservoir 920, and further through the space above the processing liquid 910 in the liquid reservoir 920 to the discharge cylinder 940, and discharges it to the outside from the upper end of the discharge cylinder 940, removing foreign matter as the air passes through the processing cylinder 930.

[0004] The processing liquid 910 is sent downward by a pump 950 from a nozzle 951 located inside the processing cylinder 930 at a rate of, for example, 80 liters or more per minute, and ejected at high pressure. The high-pressure ejection of the processing liquid 910 creates an airflow. The excess processing liquid 910 is discharged along with floating foreign matter from a discharge section formed at a predetermined level in the liquid reservoir tank 920, and several liters per minute are replenished by a replenishment section 970. Such a processing apparatus 900 is disclosed in Patent Document 1.

[0005] Patent Document 2 discloses a processing device that uses a blower instead of blowing air by high-pressure ejection from a pump.

[0006] Furthermore, a treatment apparatus for purifying oil-containing air is disclosed in Patent Document 3. The treatment apparatus in Patent Document 3 has a mesh member installed in a duct through which air flows, and a nozzle is positioned upstream of the mesh member. The treatment liquid is then applied to the mesh member to remove oil contained in the air. Patent Document 4 also discloses a treatment apparatus in which a mesh member for removing oil by applying a treatment liquid is placed in a duct.

[0007] Patent Document 5 discloses an apparatus for treating oil fumes using oil instead of water or aqueous solution as the treatment liquid. Using oil as the treatment liquid, as in the apparatus described in Patent Document 5, is expected to reduce the amount of liquid used to purify oil-containing air and reduce the frequency of replenishment.

[0008] Regarding the configuration corresponding to the liquid reservoir 920, comparing the apparatus of Patent Document 5 with the apparatuses of Patent Documents 1 and 2, Patent Documents 1 and 2 have a rectangular parallelepiped shape similar to the liquid reservoir 920, whereas in Patent Document 3, the configuration corresponding to the liquid reservoir 920 is a non-rectangular parallelepiped shape with a part of the rectangular parallelepiped removed. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Unexamined Patent Publication No. 48-52669 [Patent Document 2] Patent No. 4173169 [Patent Document 3] Japanese Patent Publication No. 2014-14758 [Patent Document 4] Japanese Patent Publication No. 2005-30718 [Patent Document 5] Japanese Utility Model Publication No. 56-8834 [Overview of the project] [Problems that the invention aims to solve]

[0010] Conventional treatment devices 900 primarily purify the air within the treatment cylinder 930. They are not configured to perform a first-stage purification by spraying treatment liquid into another duct located upstream of the treatment cylinder 930 with its axis extended horizontally, nor to perform a second-stage purification by spraying treatment liquid into the downstream treatment cylinder.

[0011] Therefore, the present invention aims to provide a purification device. [Means for solving the problem]

[0012] The purification device of the present invention comprises an exhaust passage that is hollow and has one end forming an inlet and the other end forming an outlet, and a blower that sends the air from the inlet to the outlet, the exhaust passage having an upstream section with an inlet that guides the air to a position lower than the inlet, a downstream section that rises up next to the upstream section and has the outlet at a higher part, and an intermediate section provided below the upstream and downstream sections and forming the lowest part of the exhaust passage, guiding the air from the lower end of the upstream section to the lower end of the downstream section, and using a part of the inside of both to store the treatment liquid, the upstream section comprises a first processing section having at least one first nozzle, and a second processing section having at least one second nozzle and provided downstream of the first processing section, the treatment liquid stored in the intermediate section is sent to the first nozzle and the second nozzle, the treatment liquid coming out of the first nozzle and the second nozzle is collected in the intermediate section and at least a portion of the treatment liquid is circulated for use. The first processing unit comprises a lateral duct section with a rectangular cross-section and an axis extending horizontally, a first nozzle provided inside the lateral duct section, and at least one first porous ventilation section provided inside the lateral duct section downstream of the first nozzle. The second processing unit comprises a cylindrical body section with an axis extending vertically and its upper end connected to the first processing unit. The first porous ventilation section comprises a ventilation frame section and a plurality of first mesh sections provided inside the ventilation frame section to allow air to pass from upstream to downstream. The plurality of first mesh sections are arranged in a row from upstream to downstream, either overlapping or separated.

[0013] The purification device of the present invention preferably comprises the first processing unit having an upstream opening that forms the inlet and a downstream opening (hereinafter referred to as the downstream opening) facing downward, a flange portion that closes a part of the downstream opening, and two partition plate portions provided inside the duct body. The duct body comprises a horizontal duct portion and a direction changing portion provided downstream of the horizontal duct portion that changes the direction of the incoming air downward. The downstream opening of the duct body is formed by a rectangular opening edge. The flange portion comprises a flange body having an octagonal hole and four covering plate portions that partially overlap the flange body and protrude outward from the flange body. In the flange body, the hole is formed by an inner circumferential edge which alternates between a first edge which is provided along the opening edge and a second edge which is provided inside the opening edge. Furthermore, the outer circumferential edge is formed by alternately connecting a third edge which constitutes a portion that protrudes outward from the opening edge and a fourth edge which constitutes a portion that is located inside the opening edge. The four corner regions of the downstream opening that are not blocked by the flange body outside the fourth edge of the flange body are each blocked by the covering plate portion. Furthermore, the partition plate portion rises up with its lower end close to the two second edges which are provided near the lower end of the curved surface portion of the direction change section, and the inside of the duct body is divided into a non-air-blowing space and an air-blowing space above the covering plate portion near the lower end of the curved surface portion.

[0014] The purification device of the present invention preferably includes the first processing unit that includes a duct main body portion having an inlet with a horizontally opened upstream opening and a downstream opening end provided facing downward, and a lighting device. The duct main body portion includes the horizontal duct portion and a direction changing portion provided downstream of the horizontal duct portion for changing the direction of the inflowing air downward. The lighting device includes a light source portion disposed outside the duct main body portion and a light guide portion penetrating through the curved surface portion of the direction changing portion. The light guide portion is provided with a cylindrical through portion and a light-transmitting member provided inside the through portion to prevent gas and liquid from passing through. The cylindrical main body portion of the second processing unit is provided with a window portion for visually inspecting the inside.

[0015] The purification device of the present invention preferably includes the horizontal duct portion having a bottom surface portion forming an inclined surface descending from the upstream side to the downstream side, and at least a part of the inclined surface or at least a part of the bottom extension portion extending from the lower end of the inclined surface and formed with a different inclination or a curved surface from the inclined surface projects inward in a eaves shape more than the upper end of the cylindrical main body portion of the second processing unit.

Effects of the Invention

[0016] According to the present invention, foreign matters contained in the air can be further reduced.

Brief Description of the Drawings

[0017] [Figure 1] It is a front view showing a purification device according to an embodiment of the present invention. [Figure 2] It is a rear view showing a purification device according to an embodiment of the present invention. [Figure 3] It is a left side view showing a purification device according to an embodiment of the present invention. [Figure 4] It is a plan view showing a purification device according to an embodiment of the present invention. [Figure 5] It is an exploded perspective view of an exhaust flow path of a purification device according to an embodiment of the present invention. [Figure 6](a) is a front view of the first processing unit of the purification device according to an embodiment of the present invention, (b) is a left side view of the first processing unit of (a), (c) is a top view of the first processing unit of (a), (d) is a cross-sectional view of the first processing unit of (a) along the line S1-S1, and (e) is an end view of the first processing unit of (a) along the line S3-S3. [Figure 7] (a) is an exploded rear perspective view of the first processing unit in Figure 6(a), (b) is a diagram illustrating the configuration around the flange portion of the first processing unit in Figure 6(a), and (c) is a rear perspective view of the first processing unit in Figure 6(a). [Figure 8] (a) is a front view showing the first porous ventilation section of the first processing unit in Figure 6(a), (b) is a left side view of the first porous ventilation section in (a), (c) is a top view of the first porous ventilation section in (a), (d) is an end view of the first porous ventilation section along the S2-S2 line in (a), (e) is an enlarged view of the ventilation holes in the first porous ventilation section in (a), and (f) is a schematic perspective view of a part of the first porous ventilation section in (a) that has been enlarged. [Figure 9] (a) is a partial cross-sectional view of the purification device along the line S4-S4 in Figure 1, (b) is a partial cross-sectional view of the purification device along the line S5-S5 in Figure 3, and (c) is an enlarged view of the area within the dashed circle in (b). [Figure 10] (a) is a schematic end view showing the first eaves-like portion of the purification device according to an embodiment of the present invention, and (b) is a schematic end view showing the second eaves-like portion of the purification device according to an embodiment of the present invention. [Figure 11] (a) is an exploded perspective view of the intermediate section of the purification device according to an embodiment of the present invention, (b) is a perspective view showing the container-shaped section and reinforcing section of the intermediate section of the purification device according to an embodiment of the present invention, (c) is a front view of the reinforcing component of the purification device according to an embodiment of the present invention, and (d) is an enlarged cross-sectional view of the reinforcing component along the line S6-S6 in (c). [Figure 12] (a) is a schematic perspective view showing the internal structure of the intermediate section of a purification device according to an embodiment of the present invention, (b) is a front view of the first porous section, and (c) is a left side view of the first porous section in (b). [Figure 13] This is a schematic piping diagram for oil supply in a purification device according to an embodiment of the present invention. [Figure 14] A perspective view showing the state of use of a purification device according to an embodiment of the present invention. [Figure 15] (a) to (c) are diagrams illustrating modified examples of the purification device according to the present invention. [Figure 16] This figure illustrates a modified example of the intermediate residue reduction section of a purification device according to an embodiment of the present invention. [Figure 17] (a) to (d) are diagrams illustrating modified examples of the intermediate residual amount reduction section of the purification device according to an embodiment of the present invention. [Figure 18] This is a diagram showing a conventional water purification system. [Modes for carrying out the invention]

[0018] (Purification device 1) Figure 1 is a front view showing a purification device 1 according to an embodiment of the present invention, Figure 2 is a rear view showing the purification device 1, Figure 3 is a left side view showing the purification device 1, and Figure 4 is a top view showing the purification device 1. The purification device 1 comprises an exhaust section 10 through which air generated by other manufacturing equipment and discharged outdoors flows, and a support section 50 that lands on the work floor G (installation surface) and supports the exhaust section 10, and performs a purification process to reduce foreign matter contained in the air as it flows through the exhaust section 10.

[0019] The exhaust section 10 comprises an exhaust passage 10A which is hollow inside and has an inlet at one end and an outlet at the other end, and a blower 10B which is provided at the outlet of the exhaust passage 10A and sends air from the inlet to the outlet.

[0020] Figure 5 is an exploded perspective view of the exhaust passage 10A. The exhaust passage 10A comprises an upstream section 100 having an air inlet and guiding air to a position lower than the inlet, a downstream section 200 provided next to the upstream section 100 and guiding air from a lower position to a higher position, and an intermediate section 300 provided below the upstream section 100 and the downstream section 200, forming the lowest part of the exhaust passage 10A and guiding air from the lower end of the upstream section 100 to the lower end of the downstream section 200.

[0021] (Upstream section 100) The upstream section 100 includes a first processing unit 110 and a second processing unit 120.

[0022] (First Processing Unit 110) Figure 6 shows the first processing unit 110, where (a) is a front view, (b) is a left side view, (c) is a top view, and (d) is a cross-sectional view of the first processing unit 110 along the line S1-S1 in (a). Figure 7(a) is a rear perspective view of the first processing unit 110 with a portion of it disassembled.

[0023] The first processing unit 110 includes a duct body D1 having an upstream opening that forms a laterally opening inlet and a downstream opening that faces downward, a nozzle 77A (first nozzle) provided inside the duct body D1, a first porous ventilation section 60 provided inside the duct body D1 downstream of the nozzle 77A, and a flange section 114.

[0024] (Duct body) As shown in Figures 6(b) and (d), the duct body D1 includes a horizontal duct section 111 with a rectangular cross-section and an axis C1 extending horizontally, a direction changing section 112 located downstream of the horizontal duct section 111 that changes the direction of the incoming air downward, and an extension section 113 located downstream of the direction changing section 112 with a rectangular cross-section and an axis C2 extending vertically.

[0025] As shown in Figure 6(d), the horizontal duct section 111 has a flat bottom surface 111bt that forms the bottom and is formed as a slope that decreases from the upstream side to the downstream side. The top surface 111up is also formed flat and has an opening 111h that leads inward for the first porous ventilation section 60, and this opening 111h is closed with a removable cover 111c. An inspection section 119 is also provided on one side surface 111L of the horizontal duct section 111. The inspection section 119 includes an inspection opening that penetrates the side surface 111L of the horizontal duct section 111 and leads into the horizontal duct section 111, and a door that can be opened and closed to cover the inspection opening. When the door is opened, the outside of the horizontal duct section 111 leads inward, and the inspection opening is sized to allow a hand or arm to be placed inside the horizontal duct section 111. The direction-changing section 112 is composed of a curved section 112A and two side sections 112L and 112R. The curved section 112A has an upper end that connects to the top section 111up of the horizontal duct section 111, and a lower end that is provided parallel to this upper end and connects to the extension section, with the upper and lower ends extending horizontally. Furthermore, the cross section of the curved section 112A, along a virtual vertical plane perpendicular to the upper and lower ends, is formed in an arc shape, except for the penetration section 116B of the lighting device 116 which will be described later. The side sections 112L and 112R extend downward from both ends that are formed in an arc shape by the curved section 112A.

[0026] The upstream opening of the horizontal duct section 111 constitutes the inlet, for example, 500mm x 600mm (opening area S'11 = 0.3m²). 2 It opens horizontally with dimensions of ). Also, the downstream opening of the horizontal duct section 111 has dimensions of, for example, 550 mm x 600 mm (opening area S'12 = 0.33 m²). 2 It opens horizontally in a rectangular shape. In this embodiment, the extension 113 is formed with a square cross-section, for example, 600 mm x 600 mm (opening area S'13 = 0.36 m²). 2 It is set to the dimensions of ) and its lower end forms the downstream opening of the duct body D1.

[0027] The first processing unit 110 is provided with a flange portion 114 that protrudes outward at the lower end 113A of the extension portion 113 of the duct body portion D1. The flange portion 114 connects the lower end 113A on the downstream side of the duct body portion D1, which has a rectangular flow channel cross section, and the cylindrical body portion 121 of the second processing unit 120, which will be described later, without any gaps. As shown in Figure 7(a), it comprises a flange body portion 114B with a circular periphery and an octagonal hole 114A on the inside, and four covering plate portions 114C with triangular outlines.

[0028] Figure 7(b) is a schematic plan view showing the lower end 113A of the extension 113 and the flange body 114B, with the flange body 114B in contact with the lower end 113A of the extension 113. The lower end 113A of the extension 113 is represented by a dashed line, and it is provided as an opening edge consisting of four connected straight edges, forming a square downstream opening. The edges forming the hole 114A of the flange body 114B are formed by eight alternating first edges e1 provided along the lower end 113A of the extension 113 and second edges e2 provided inside the lower end 113A of the extension 113, arranged around the center of the hole 114A. The first edges e1 and second edges e2 connect to form the inner periphery. Each of the first edges e1 is formed to be shorter than each of the straight edges that make up the lower end 113A of the extension 113. The hole 114A in the flange body portion 114B is smaller than the lower end 113A of the opening area S'13 of the extension portion 113, for example, the opening area S'14 is 0.3 m². 2 It is set to this.

[0029] Furthermore, the flange body portion 114B is formed by alternately connecting a third edge e3, which constitutes the portion that extends outward from the lower end 113A of the extension portion 113, and a fourth edge e4, which constitutes the portion that is located inward from the lower end 113A of the extension portion 113. As shown in Figure 7(b), when the flange body portion 114B is placed against the lower end 113A of the extension portion 113, the four peripheral edges of the flange body portion 114B have outward protrusions P. OUTIt is formed to protrude beyond the lower end 113A of the extension 113. At the lower end 113A of the extension 113, there are four corners where the straight edges connect, and the downstream opening of the extension 113 has corner regions 113B that are not blocked by the flange body 114B, outside the fourth edge e4 of the flange body 114B, as indicated by the cross hatching in Figure 7(b). These corner regions 113B are blocked by the triangular-shaped covering plate portion 114C. Figure 7(c) is a rear perspective view of the first processing unit 110, showing the duct body D1 transparently with its edge represented by a dashed line, and in particular the area around the downstream opening of the duct body D1 represented by a solid line. The covering plate portion 114C overlaps the flange body portion 114B on the slanted edge e5 side, and the portion that protrudes from the flange body portion 114B covers the corner region 113B, blocking it from flowing out through the corner region 113B. The various components constituting the duct body portion D1 are joined together by welding or other means.

[0030] (nozzle) Nozzle 77A is provided inside the lateral duct section 111 of the duct body section D1. In the first processing section 110, oil Lq1, which is the processing liquid, is ejected in the direction of air flow (downstream) from the inlet 118. In the illustrated example, there is one nozzle 77A, but the number is not limited to this.

[0031] (First porous ventilation section 60) Figure 8 shows the first porous ventilation section 60, where (a) is a front view, (b) is a left side view, (c) is a top view, and (d) is an end view of the first porous ventilation section 60 along the S2-S2 line in (a). The first porous ventilation section 60 comprises a ventilation frame section 61 with a square outline and four mesh sections 620 (first mesh sections) stretched inside the ventilation frame section 61. Each mesh section 620 has a plurality of ventilation holes 621 that allow air to pass from the upstream side to the downstream side, and these ventilation holes 621 are formed in a rhomboid shape.

[0032] Figure 8(a) shows only a portion of the ventilation holes 621 of the mesh portion 620. In the mesh portion 620, multiple ventilation holes 621 are densely arranged vertically and horizontally at a pitch equivalent to the diagonal of the rhombus shape of the ventilation holes 621. Figure 8(e) is an enlarged view of the ventilation holes 621. The size of the ventilation holes 621 is, for example, 12 mm for the long diagonal im1 and 7 mm for the short diagonal im2, and the mesh portion 620 is configured with an opening ratio of 73.8%, but it is not limited to this. In a single mesh portion 620, each ventilation hole 621 is aligned along the longitudinal side of the diagonal im1. Wire mesh or expanded metal can be used as the mesh portion 620, and the shape of the ventilation holes 621 is not limited to the illustrated example; it may also be hexagonal or rectangular.

[0033] Figure 8(d) schematically shows four mesh sections 620 with solid lines, and each mesh section 620 is arranged apart from the upstream side to the downstream side. In the illustrated example, each mesh section 620 is provided at a predetermined interval. The interval is smaller than the dimension of the long diagonal im1, for example 10 mm, but the interval may be wider than this, or conversely, the interval may be narrowed to, for example 1 mm, so that they are close to each other or overlapping and in close contact. The first porous ventilation section 60 includes a support section 63 provided in a cross shape inside the ventilation frame section 61, and a plurality of spacers 64 protruding from the support section 63, and each mesh section 620 has a part of its inner surface fixed to the spacer 64 and its periphery fixed to the ventilation frame section 61.

[0034] Figure 8(f) is a schematic perspective view of the four mesh sections 620 that constitute the first porous ventilation section 60. Each mesh section 620 is provided on the ventilation frame 61 such that the orientation of the longitudinal side of the ventilation holes 621 along the long diagonal im1 differs from that of the other opposing mesh sections 620. The first porous ventilation section 60 can also be configured by changing the number of mesh sections 620, using different shapes, sizes, and numbers of ventilation holes 621 in each mesh section 620, aligning the orientation of the longitudinal side of each ventilation hole 621 along the diagonal im1 in multiple mesh sections 620, or setting the orientation of the longitudinal side of each ventilation hole 621 along the diagonal im1 to a different orientation than in the illustrated example, thereby changing the structure of the airflow section.

[0035] Here, as shown in Figure 8(a), the ventilation frame 61 comprises a pair of parallel first frame sections 611 and a pair of parallel second frame sections 612, with the first frame sections 611 and the second frame sections 612 alternatingly connected to form a square opening on the inside when viewed from the front. The ventilation frame 61 has an outer shape that is, for example, 550 mm × 550 mm when viewed from the front, forming a square shape, and its interior has dimensions of, for example, 516 mm × 516 mm, with an opening area S′60 = 0.26 m². 2 It's open.

[0036] In Figures 8(a) and 8(f), arrow A1 indicates the direction along the edge extending vertically in the front view of Figure 8(a), which is formed by the first frame portion 611, and arrow A2 indicates the direction along the edge extending horizontally in the front view of Figure 8(a), which is formed by the second frame portion 612. In the first and third mesh portions 620 from the top, the long diagonal im1 of the ventilation holes 621 extends in the longitudinal direction A1, and in the second and fourth mesh portions 620 from the top, the long diagonal im1 of the ventilation holes 621 extends in the longitudinal direction A2. The following explanation will use the case in which one side of the first frame portion 611 is positioned to the left and the other side to the right, and one side of the second frame portion 612 is positioned at the bottom and the other side at the top as an example.

[0037] The first porous ventilation section 60 is housed in the lateral duct section 111 of the duct body section D1. Figure 6(e) is a partial end view of the lateral duct section 111 along the line S3-S3 in Figure 6(a), and a pair of support sections 115L and 115R are provided inside the opposing side sections 111L and 111R to support the ventilation frame section 61. The support sections 115L and 115R each have two parallel frame support sections 115A and 115B, respectively. The support section 115L on one side section 111L inserts one first frame section 611 between the frame support sections 115A and 115B, and the support section 115R on the other side section 111R inserts the other first frame section 611 between the frame support sections 115A and 115B, thereby supporting the first porous ventilation section 60.

[0038] The vertical and horizontal dimensions of the first porous ventilation section 60, 550 mm x 550 mm, are larger than the vertical and horizontal dimensions of the inside of the horizontal duct section 111 (opening cross-sectional areas S'11 and S'12). Therefore, assuming that one mesh section 620 is a surface, the first porous ventilation section 60 is tilted and housed inside the horizontal duct section 111 such that the normal to that surface is non-parallel to the axis of the horizontal duct section 111. The longitudinal direction (arrow A2) of the second frame section 612 extends horizontally at a 90-degree angle to the axis of the horizontal duct section 111. For this reason, the receiving sections 115L and 115R are also provided on the side sections 111L and 111R along imaginary lines inclined with respect to the vertical, as shown in Figure 6(d).

[0039] In the horizontal duct section 111 of the first processing unit 110, the first porous ventilation section 60 is positioned at an angle, with one second frame section 612 located on the top surface 111up side shifted upstream of the other second frame section 612 located on the bottom surface 111bt side. In this way, since the first porous ventilation section 60 is positioned at an angle in the same direction as the bottom surface 111bt of the horizontal duct section 111, the mesh section 620 can be arranged to spread widely within the horizontal duct section 111.

[0040] The receiving sections 115L and 115R may each be composed of a single member with a U-shaped cross-section, or they may each be composed of two angle-shaped members. In this embodiment, two sets of receiving sections 115L and 115R are provided so that two first porous ventilation sections 60 are housed in the horizontal duct section 111, separated on the upstream and downstream sides, but the number of first porous ventilation sections 60 provided in the first processing section 110 is not limited. An opening 111h is provided in the top surface section 111up so that the first porous ventilation sections 60 housed in the horizontal duct section 111 can be moved in and out. Although not shown in the figures, the receiving sections may be arranged on the top surface section 111up side and the bottom surface section 111bt side, and the second frame section 612 may be placed in the receiving sections to support the first porous ventilation sections 60, and openings for moving the first porous ventilation sections 60 in and out may be provided in the side surfaces 111L and 111R. Alternatively, the mesh portion 620 may be housed in the horizontal duct portion 111 without tilting the first porous ventilation portion 60, in other words, the mesh portion 620 may be perpendicular to the axis of the horizontal duct portion 111, as shown in the illustrated example.

[0041] Furthermore, the first processing unit 110 provides a lighting device 116 in the direction changing section 112 of the duct body D1. As shown in Figure 6(d), the lighting device 116 includes a light source unit 116A positioned on the outside of the duct body D1 and equipped with a light-emitting element, a light guide unit 116D which has a cylindrical through-hole 116B that penetrates the curved surface 112A of the direction changing section 112 and a light-transmitting member 116C such as transparent glass provided inside the through-hole 116B to prevent gas and liquid from passing through, and a lighting support unit 116E such as a bracket that holds the light source unit 116A above the light guide unit 116D. The upper end of the through-hole 116B protrudes upward from the outer surface of the curved surface 112A and has the light-transmitting member 116C inside the protruding part, and the lower end protrudes downward from the inner surface of the curved surface 112A into the air-blowing space. The light source section 116A, the light guide section 116D, and the center of the hole 114A in the flange section 114 are located on the extension of the axis of the cylindrical body section 121 of the second processing section 120, which will be described later. The lighting device 116 may also be configured by omitting the lighting support section 116E and fixing the light source section 116A on the through section 116B.

[0042] Furthermore, as shown in Figure 7(c), the first processing unit 110, within the direction-changing section 112 and extension section 113 of the duct body D1, has two covering plate sections 114C located near the lower end of the curved section 112A. The curved section 112A, the side section 112L, and one covering plate section 114C form a corner section Z1, and the curved section 112A, the side section 112R, and the other covering plate section 114C form a corner section Z2. Since air tends to stagnate in corner sections Z1 and Z2, the first processing unit 110 is provided with two partition plate sections 117 to divide the inside of the duct body D1 into a non-ventilated space that is not used for airflow and a ventilated space through which air flows. One partition plate portion 117 has its lower end close to one second edge e2 of the flange body portion 114B, which is located near the lower end of the curved portion 112A, and the other partition plate portion 117 has its lower end close to the other second edge e2 of the flange body portion 114B, which is located near the lower end of the curved portion 112A. The partition plate portions 117 rise from the upper surface or second edge e2 of the flange body portion 114B.

[0043] The first processing unit 110 has a flange portion 118A around the inlet 118, and a packing is placed between it and the flange portion of another duct installed at a grounding location such as a factory, and the two are connected by fasteners such as bolts and nuts. Between the other duct installed in the factory and the first processing unit 110, duct members with other functions may be provided, as shown by the dashed lines in the left side view of Figure 3 and the plan view of Figure 4. For example, a fire-resistant joint portion 400 equipped with a damper that closes the exhaust flow path at a predetermined temperature inside a duct portion with a square cross-section, or a joint portion 500 formed to taper downstream so that the inner opening cross-section gradually becomes smaller from the upstream side to the downstream side.

[0044] (Second processing unit 120) Figure 9(a) is a partial cross-sectional view of the purification device 1 along the line S4-S4 in Figure 1, and (b) is a partial cross-sectional view of the purification device 1 along the line S5-S5 in Figure 3. As shown in Figures 5 and 9, the second processing unit 120 comprises a cylindrical body portion 121 formed in a cylindrical shape with an axis C2 extending in the vertical direction, flange portions 122 and 123 protruding outward at the upper and lower open ends of the cylindrical body portion 121, a window portion 124 provided on the outer circumferential surface of the cylindrical body portion 121 for visual inspection of the inside, an inspection portion 125 further provided on the outer circumferential surface of the cylindrical body portion 121, and nozzles 77B, 77C, and 77D (second nozzles).

[0045] Nozzles 77B, 77C, and 77D are positioned vertically apart. All three nozzles 77B, 77C, and 77D are directed downwards. As shown by the dashed lines in Figures 9(a) and (b), oil Lq1 is ejected from each nozzle 77B, 77C, and 77D at a wide angle. The ejection angle is set larger for the two nozzles 77B and 77C, which are located higher inside the cylinder body 121, and smaller for the lowest nozzle 77D, but the ejection angle is not limited.

[0046] The window section 124 penetrates the cylindrical body section 121 and closes a hole that leads to the inside of the cylindrical body section 121, and comprises a transparent material 124A such as glass and a frame section 124B that supports it. The inspection section 125 comprises an inspection opening that penetrates the side of the cylindrical body section 121 and leads to the inside of the cylindrical body section 121, and a door section that covers the inspection opening so as to be openable and closable. When the door section of the inspection section 125 is opened, the outside of the cylindrical body section 121 is accessible from the inside, and the inspection opening is configured to be large enough to allow a hand or arm to be placed inside the cylindrical body section 121.

[0047] The first processing unit 110 and the second processing unit 120 are connected by aligning the center of the hole 114A in the flange portion 114 of the first processing unit 110 with the central axis of the downstream second processing unit 120, inserting a packing in between, and bringing the upper flange portion 123 of the second processing unit 120 into contact with the flange body portion 114B of the first processing unit 110, using fasteners such as bolts and nuts (not shown) that pass through bolt holes provided in them.

[0048] In the second processing unit 120, the inner diameter of the cylindrical body 121 is φ650 mm, and the upstream opening of the cylindrical body 121 is formed to be larger than the hole 114A of the flange portion 114 of the first processing unit 110. If we consider the case where the upstream opening of the cylindrical body 121 (a circle with a diameter of φ650 mm) and the octagonal hole 114A of the flange portion 114 of the first processing unit 110 are aligned at their centers and superimposed in a plan view, the edge of the octagonal hole 114A is positioned inside the edge of the upstream circular opening (a circle with a diameter of φ650 mm). The areas around the first edge e1 and the second edge e2 that form the hole 114A of the flange portion 114, which is located near the lower edge where the slope of the bottom surface portion 111bt is lowest, protrude inward from the upper end 121A of the cylindrical body 121. Here, Figure 10(a) is an enlarged view of the area of ​​the dotted circle in Figure 6(d), showing the cross-sectional shape at the first edge e1 that forms the hole 114A, and representing the form in which the first eaves-like portion P1 protrudes inward. The first eaves-like portion P1 consists of the bottom surface portion 111bt of the horizontal duct portion 111, one side surface portion 113C of the extension portion 113 that extends downward from the lower end (bottom end) of the slope of the bottom surface portion 111bt, and an outward projection P that extends outward from the lower end of the one side surface portion 113C to the outside of the extension portion 113. OUTThe structure is as follows: With respect to the axis C2 passing through the extension 113 and the cylindrical body 121, the first edge e1 that forms the hole 114A of the extension 113 and flange 114, which extends downward from the lower end of the slope of the bottom surface 111bt of the lateral duct 111, is positioned closer to the axis C2 than to the cylindrical body 121, and the gap Δ between them is, for example, about 15 mm at the cross-sectional location. Furthermore, Figure 10(b) shows the cross-sectional shape at the second edge e2 marked with an asterisk in Figure 7(c), representing the form in which the second eaves-like portion P2 protrudes inward. On the side of the second edge e2, which is provided next to the first edge e1 that constitutes the first eaves-like portion P1, the covering plate portion 114C and the flange body portion 141B located below it constitute the second eaves-like portion P2, which protrudes inward from the upper end of the cylindrical body portion 121.

[0049] (Intermediate section 300) Figure 11(a) is an exploded perspective view of the intermediate section 300 of the exhaust passage 10A. The intermediate section 300 comprises a container-shaped section 310 through which air flows and processing liquid accumulates, reinforcing sections 320 provided on the outside and inside of the container-shaped section 310, and a plate section 330 that covers a part of the container-shaped section 310.

[0050] The container-shaped part 310 includes a flow channel forming part 311, which is formed in the shape of a rectangular parallelepiped container with a rectangular opening 311A ​​on top and a height H1 set to be smaller than the dimension L1 of the long edge e11 of the opening 311A, and a deep part 312' which is formed in the shape of a small container with a smaller volume than the flow channel forming part 311, with a part of the bottom of the flow channel forming part 311 being recessed downwards compared to the rest of the bottom.

[0051] The bottom of the channel forming section 311 is sized and shaped to form the same contour as the opening 311A ​​in a plan view. Furthermore, the bottom of the channel forming section 311 is located at a shallower position than the deep section 312', and the bottom is divided by a boundary that extends parallel to the short edge e12 of the opening 311A, with one end opening as a bottom hole section 311h and the other end being a shallow bottom section 311bt facing upwards. The bottom hole section 311h is located below the upstream section 100 and is larger than the opening at the lower end of the cylindrical body section 121.

[0052] The side surface of the channel forming section 311 is composed of a side surface rising from the periphery of the bottom, which is formed by the bottom hole section 311h and the shallow bottom section 311bt being arranged side by side. Specifically, the side surface of the channel forming section 311 includes a first side surface section 311F and a second side surface section 311B, which are provided in parallel and form the long edge e11 of the opening 311A, and a third side surface section 311L and a fourth side surface section 311R, which are provided in parallel and form the short edge e12 of the opening 311A. The third side surface section 311L is provided on the upstream side, and the fourth side surface section 311R is provided on the downstream side. The shallow bottom section 311bt is connected to the lower ends of the first side surface section 311F, the second side surface section 311B, and the fourth side surface section 311R. The bottom hole section 311h, provided next to the shallow bottom section 311bt, forms the opening of the small container-shaped deep section 312' and opens over the upstream section 100 provided above. In Figure 7(a), the boundary BL between the flow channel forming section 311 and the deep section 312' is represented by a dashed line, and a portion of the boundary BL forms the boundary between the bottom hole section 311h and the shallow bottom section 311bt. In the flow channel forming section 311, the area enclosed by the first side section 311F, the second side section 311B, the third side section 311L, the fourth side section 311R, the shallow bottom section 311bt, and the bottom hole section 311h is mainly configured as a ventilation space for airflow.

[0053] As shown in Figures 9(a) and (b), the deep portion 312' comprises a deep bottom portion 312bt' and deep side portions rising from its periphery. In plan view, the deep bottom portion 312bt' is formed in the shape of a rectangle with the same contour as the bottom hole portion 311h, and the deep side portions comprise a first side portion 312F', a second side portion 312B', a third side portion 312L', and a fourth side portion 312R', which rise from each edge forming the periphery of the deep bottom portion 312bt'. The deep portion 312' is located below the flow path forming portion 311 (first side portion 311F, second side portion 311B, third side portion 311L, fourth side portion 311R, shallow bottom portion 311bt, and bottom hole portion 311h) in the vessel-shaped portion 310, and constitutes the deep part inside the vessel-shaped portion 310.

[0054] The following explanation will proceed using the example of a case where the deep section 312' is used as a liquid reservoir, and oil Lq1 and a smaller amount of water Lq2 are placed in the deep section 312', as shown in Figure 9(b). The type of oil Lq1 is not limited, but recycled industrial oil can be used as an example.

[0055] (Reinforcement section 320) Figure 11(b) is a perspective view showing the container-shaped portion 310 and the reinforcing portion 320 of the intermediate portion 300, with the container-shaped portion 310 viewed through and only the edge shown by a dashed line. The intermediate portion 300 is provided with the reinforcing portion 320 in the portion where the container-shaped portion 310 guides air from the upstream portion 100 to the downstream portion 200, that is, in the flow path forming portion 311. The reinforcing portion 320 comprises a frame-shaped first reinforcing portion 321 surrounding the lower portion of the flow path forming portion 311, a plurality of second reinforcing portions 322 provided around the flow path forming portion 311 and rising from the first reinforcing portion 321, and a frame-shaped third reinforcing portion 323 surrounding the higher portion of the flow path forming portion 311. The first reinforcing portion 321 is provided on the outside of the first side portion 311F, the second side portion 311B, the third side portion 311L, and the fourth side portion 311R, and for example, its mounting position is set higher than the uppermost end of the slope which forms the shallow bottom portion 311bt. The third reinforcing portion 323, which is a frame-shaped reinforcing portion, is provided on the outside of the first side portion 311F, the second side portion 311B, the third side portion 311L, and the fourth side portion 311R, and for example, it is provided close to the upper ends of the first side portion 311F, the second side portion 311B, the third side portion 311L, and the fourth side portion 311R which constitute the opening 311A.

[0056] The first reinforcing section 321, the second reinforcing section 322, and the third reinforcing section 323 are composed of one or more reinforcing components. Figure 11(c) is a front view of the reinforcing component 40, and Figure 11(d) is an enlarged cross-sectional view of the reinforcing component 40 along the line S6-S6 in Figure 11(c). The reinforcing component 40 has a base 41 formed in the shape of a rectangular plate with a surface facing the vessel-shaped section 310, and rectangular plate-shaped protrusions 42 that are smaller than the base 41 and extend perpendicularly from one edge and the other edge of the base 41, respectively, forming a U-shape in cross-section, and the spacing W of the protrusions 42 is set to be smaller than the dimension L2 between the two ends of the base 41 where there are no protrusions 42 (from one end to the other), resulting in an elongated shape. In the following explanation, a reinforcing component 40 that is attached so that its longitudinal direction extends horizontally from one end to the other will be called a horizontal member 40A, and a reinforcing component that is attached so that its longitudinal direction extends vertically from one end to the other will be called a vertical member 40B.

[0057] The first reinforcing section 321 and the third reinforcing section 323 are arranged in a frame-like manner by connecting horizontal members 40A of different lengths: longer ones attached to the first side section 311F and the second side section 311B, and shorter ones attached to the third side section 311L and the fourth side section 311R. The two long horizontal members 40A are provided parallel to each other, and are also provided parallel to the long edge e11 of the opening 311A. The two short horizontal members 40A are provided parallel to each other, and are also provided parallel to the short edge e12 of the opening 311A.

[0058] The second reinforcing section 322 is provided with vertical members 40B of the same length along the corners where the first side section 311F and the third side section 311L connect, the corners where the first side section 311F and the fourth side section 311R connect, the corners where the second side section 311B and the third side section 311L connect, and the corners where the second side section 311B and the fourth side section 311R connect, and is also provided at locations away from the corners.

[0059] In the first reinforcing section 321, the second reinforcing section 322, and the third reinforcing section 323, which are provided on the outside of the vessel-shaped section 310, each reinforcing component 40 (40A, 40B) is fixed to the vessel-shaped section 310 by bringing the surface 411, where the protruding portion 42 does not extend from the base 41, into contact with the vessel-shaped section 310. As a fixing method, each reinforcing component 40 (first reinforcing section 321, second reinforcing section 322, and third reinforcing section 323) is attached to the vessel-shaped section 310 by welding, bolts and nuts passed through bolt holes provided in each reinforcing component 40 (first reinforcing section 321, second reinforcing section 322, and third reinforcing section 323) and the vessel-shaped section 310, or by bringing the reinforcing component 40 (first reinforcing section 321, second reinforcing section 322, and third reinforcing section 323) close to the surface of the vessel-shaped section 310 via a bracket or the like.

[0060] Each horizontal member 40A constituting the first reinforcing section 321 has two protrusions 42 arranged vertically, with the lower protrusions 42 being at the same height. More precisely, each protrusion 42 (lower side) is positioned on a virtual first horizontal plane, and a first mounting surface facing downwards is provided on this first horizontal plane on the lower side of the protrusion 42. As will be described later, the first mounting surface 321A of the long horizontal member 40A attached to the first side section 311F and the second side section 311B rests on the support section 50, and the intermediate section 300 is supported by the support section 50.

[0061] In the multiple horizontal members 40A that make up the third reinforcement section 323, two protrusions 42 are arranged so that they are aligned vertically. In the third reinforcement section 323, the upstream section 100 and downstream section 200 are attached using the protrusion 42 provided on the higher side, as will be described later. The protrusions 42 (upper side) of each horizontal member 40A that make up the third reinforcement section 323 are arranged on a virtual second horizontal plane. In addition, in the third reinforcement section 323, the ends of adjacent horizontal members 40A are also welded, and gaps at connection points are sealed by the welds, making it impossible for liquids or air to pass through.

[0062] Furthermore, as shown in Figure 11(b), the reinforcing section 320 includes a fourth reinforcing section 324 inside the frame-shaped third reinforcing section 323. The fourth reinforcing section 324, as an inner reinforcing section, is provided with two horizontal members 40A. The two horizontal members 40A of the fourth reinforcing section 324 are fixed by welding or the like with the base 411, with the surfaces 411 that do not have a protruding portion 42 aligned. One end of each horizontal member 40A of the fourth reinforcing section 324 is fixed by welding or the like to a horizontal member 40A provided on the outside of the first side portion 311F, and the other end is fixed by welding or the like to a horizontal member 40A provided on the outside of the second side portion 311B. The fourth reinforcing section 324 is provided parallel to the short edge e12 of the opening 311A. The first side portion 311F and the second side portion 311B of the vessel-shaped section 310 have a portion of their upper ends formed as a notched reinforcing passage portion 311T for passing the fourth reinforcing section 324 through. One horizontal member 40A of the fourth reinforcement section 324 has its surface 412 facing the third side surface 311L, and the other horizontal member 40A has its surface 412 facing the fourth side surface 311R. Each horizontal member 40A has two protrusions 42 arranged vertically, with the protrusion 42 on the higher side being at the same height as the protrusion 42 on the higher side of the horizontal member 40A that constitutes the third reinforcement section 323, which is located outside the vessel-shaped section 310. In other words, the protrusions 42 of the third reinforcement section 323 and the fourth reinforcement section 324 are arranged on a virtual second horizontal plane. Note that instead of a U-shaped cross section, an L-shaped angle or the like may be used as the horizontal member 40A that constitutes the fourth reinforcement section 324, or the fourth reinforcement section 324 may be composed of a single horizontal member 40A.

[0063] In the third reinforcement section 323 and the fourth reinforcement section 324, two mounting surfaces (second mounting surface and third mounting surface) arranged in a frame shape are provided facing upward on the second horizontal plane. Furthermore, the fourth reinforcement section 324 divides the inside of the third reinforcement section 323 into an upstream opening OP1 located below the upstream section 100 and a downstream opening OP2 located below the downstream section 200. In Figure 11(b), the reference numerals M1 to M6 are used to distinguish between the horizontal members 40A that constitute the upstream opening OP1 and the second mounting surface and the horizontal members 40A that constitute the downstream opening OP2 and the third mounting surface. The second mounting surface is formed by a frame-like arrangement of a horizontal member 40A (M1) provided along one short edge e12 of the opening 311A ​​by the third reinforcing part 323, a fourth reinforcing part 324 (M2) provided parallel to it, and a part of the horizontal member 40A of the third reinforcing part 323 (M31, M41) provided along the long edge e11 so as to connect the ends of these, with the protruding parts 42 (upper side) of these forming the surface facing upward. The upstream opening OP1 is composed of the horizontal member 40A (M1), the fourth reinforcing part 324 (M2), and a part of the horizontal member 40A (M31, M41). The third mounting surface is formed by a frame-like arrangement of a horizontal member 40A (M5) provided along the other short edge e12 of the opening 311A ​​by the third reinforcing section 323, the other fourth reinforcing section 324 (M6) provided parallel to it, and the other parts (M32, M42) of the horizontal member 40A of the third reinforcing section 323 provided along the long edge e11 to connect their ends, with these protruding parts 42 (upper side) forming the surface facing upward. The downstream opening OP2 is composed of the horizontal member 40A (M5), the fourth reinforcing section 324 (M6), and the other parts (M32, M42) of the horizontal member 40A.

[0064] Figure 9(c) is an enlarged view of the area enclosed by the dashed circle in Figure 9(b), where a portion of the third reinforcing portion 323 is provided to protrude above the opening of the vessel-shaped portion 310. The upper end of the side portion constituting the opening 311A ​​of the vessel-shaped portion 310 is positioned lower than the upper protrusions 42 of the third reinforcing portion 323 and the fourth reinforcing portion 324, and is fixed to the surface 411 by welding. A portion of the fourth reinforcing portion 324 also protrudes above the opening of the vessel-shaped portion 310. The gap between the third reinforcing portion 323 and the side portions of the vessel-shaped portion 310 (first side portion 311F, second side portion 311B, third side portion 311L, and fourth side portion 311R) is filled with a welded portion 313 so as not to form a gap. The positional relationship between the third reinforcing portion 323 and the upper end of the side portion constituting the opening 311A ​​of the vessel-shaped portion 310 is not limited to the illustrated example, and they may be arranged so that the higher parts are aligned, excluding the reinforcing passage portion 311T.

[0065] The reinforcing portion 320 provided on the vessel-shaped portion 310 functions as a support for the upstream portion 100. In the divided exhaust passage 10A, the upstream portion 100 is attached to a plate portion 330 placed on a second mounting surface composed of a third reinforcing portion 323 and a fourth reinforcing portion 324, and rises up. The hole 331 in the plate portion 330 is formed to be the same as the inner circumferential surface of the second processing portion 120, and the central axis of the second processing portion 120 is aligned with the center of the hole in the plate portion 330, so that the second processing portion 120 rests on the plate portion 330. The plate portion 330 is fixed by welding without leaving any gaps between it and the protruding portions 42 of the third reinforcing portion 323 and the fourth reinforcing portion 324, or, as shown in Figure 9(c), a packing 37 is placed between the plate portion 330 and the protruding portions 42 and fixed with bolts and nuts that pass through the bolt holes that penetrate them. As part of the purification process, the purification device 1 applies oil Lq1 to the air flowing through the upstream section 100, as described later, to reduce the amount of oil (other oils) present in the air as foreign matter.

[0066] The intermediate section 300 includes an intermediate residual amount reduction section 340 in the flow path forming section 311, which reduces the amount of residual oil by converting any oil remaining in the treated air into droplets as the treated air, which has undergone oil reduction purification treatment in the upstream section 100, flows toward the downstream section 200. Figure 12(a) is a schematic perspective view showing the internal structure of the intermediate section 300, and the intermediate residual amount reduction section 340 includes a plurality of first porous sections 341H and a plurality of second porous sections 341L that allow air flowing toward the downstream section 200 to pass through, and a first ventilation support section 342H and a second ventilation support section 342L that extend from the first side section 311F to the second side section 311B inside the container-shaped section 310.

[0067] Figure 12(b) is a front view of the first porous section 341H, and Figure 12(c) is a left side view of the first porous section 341H. Each first porous section 341H includes a ventilation body section 341A with multiple ventilation holes for allowing air to pass from the upstream side to the downstream side, and a bent section 341B that protrudes in different directions from the end of the ventilation body section 341A and overlaps with the first porous section 341H. The second porous section 341L also includes a ventilation body section 341A and a bent section 341B, similar to the first porous section 341H.

[0068] The first ventilation support section 342H and the second ventilation support section 342L are each formed in a rod shape, with one end fixed to the first side section 311F and the other end fixed to the second side section 311B, and are provided parallel to the short edge of the opening 311A ​​of the container-shaped section 310. The first ventilation support section 342H is provided at a high position, and the second ventilation support section 342L is provided at a low position. Furthermore, to prevent them from being aligned vertically, in the illustrated example, the second ventilation support section 342L, which is provided at a lower position, is positioned downstream of the first ventilation support section 342H, which is provided at a higher position, towards the fourth side section 311R. A total of six first porous sections 341H and second porous sections 341L are provided, and each of the first porous section 341H and second porous section 341L is configured to be able to be inserted and removed using the inspection section 350 provided on the second side section 311B. The three first porous sections 341H are used by attaching the bent sections 341B to the first support section 342H which is provided at a higher position, and the remaining three second porous sections 341L are used by attaching the bent sections 341B to the second ventilation support section 342L which is provided at a lower position.

[0069] As the second mesh portion constituting the first porous portion 341H and the second porous portion 341L, the same material used in the manufacture of the first mesh portion (mesh portion 620) provided in the first porous ventilation portion 60 may be used, for example, a material constructed by stacking multiple pieces of expanded metal to form a rectangular outline around the periphery, with one edge bent. For example, when the first porous portion 341H and the second porous portion 341L are each composed of three second mesh portions, similar to the multiple first mesh portions (mesh portion 620) provided in the first porous ventilation portion 60, the opposing second mesh portions may be arranged so that the orientation of the long diagonal im1 of the rhombic ventilation holes 621 is different. In this embodiment, the flow path forming portion 311 is located at the lower end of the slope formed by the shallow bottom portion 311bt, with a cross-sectional opening of, for example, 1280 mm × 700 mm (opening area S'3 is 0.9 m²). 2 It is formed in the shape of a horizontally elongated rectangle, with an intermediate residual amount reduction section 340 provided around it.

[0070] In Figure 12(a), of the six first porous sections 341H and second porous sections 341L in total, one first porous section 341H located at a high position and one second porous section 341L located at a low position are represented by solid lines, while the others are represented by dashed lines. The first porous section 341H that spans the first ventilation support section 342H has a ventilation body section 341A that extends from the first ventilation support section 342H to the second ventilation support section 342L, and the second porous section 341L that spans the second ventilation support section 342L has a ventilation body section 341A that extends from the second ventilation support section 342L to the shallow bottom section 311bt. On both the first ventilation support section 342H side and the second ventilation support section 342L side, the first porous section 341H and the second porous section 341L are provided overlapping with the adjacent one in some respects. The second porous section 341L, supported by the lower second ventilation support section 342L, has its lower end resting on the shallow bottom section 311bt, while the first porous section 341H, supported by the upper first ventilation support section 342H, has its lower end resting on the second porous section 341L, which is connected to the lower second ventilation support section 342L. The arrangement of the first porous section 341H and the second porous section 341L may be such that they are in contact with each other without overlapping, or that there is a gap between them.

[0071] As shown in Figure 9(b), the first ventilation support section 342H and the second ventilation support section 342L are provided below the downstream opening OP2. The first ventilation support section 342H, being at a higher position, is positioned closer to the fourth reinforcing section 324, leaving a gap between it and the fourth reinforcing section 324. Alternatively, the end of the first ventilation support section 342H may be fixed to the horizontal member 40A of the third reinforcing section 323 by welding or the like, and positioned at the downstream opening OP2 so as to be aligned with the fourth reinforcing section 324. The end of the second ventilation support section 342L may also be fixed to the vertical member 40B of the second reinforcing section 322 by welding or the like. The first ventilation support section 342H and the second ventilation support section 342L are not limited to rod-shaped members with a circular cross-section, but can also be members with other cross-sections such as an L-shaped cross-section that extend in a rod shape, linear members, or bundles of linear members, as long as they can accommodate the bent section 341B. Furthermore, the inspection section 350 includes an inspection opening 351 that penetrates the second side surface 311B of the intermediate section 300 and leads into the intermediate section 300, and a door that can be opened and closed to cover the inspection opening 351. When the door is opened, the outside of the flow path forming section 311 is accessible from the inside, and the inspection opening 351 is sized to allow a hand or arm to be placed inside the flow path forming section 311. As shown in Figure 2, the inspection section 350 is provided on the side surface of the flow path forming section 311 of the container-shaped section 310, in a location that is not covered by the reinforcing section 320 (first reinforcing section 321, second reinforcing section 322, third reinforcing section 323) and is exposed to the outside. Furthermore, as shown in Figure 12(a), the inspection opening 351 of the inspection section 350 is located in the portion of the second side section 311B that rises from the edge of the shallow bottom section 311, and is positioned downstream of the end 342P of the first ventilation support section 342H and the end 342P of the second ventilation support section 342L, towards the fourth side section 311R. The inspection opening 351 may also be provided in the first side section 311F instead of the second side section 311B.

[0072] (Downstream 200) As shown in Figure 5, the downstream section 200 of the exhaust passage 10A includes an upward guide section 210 that guides air upward, a first joint section 220 provided above the upward guide section 210 that changes the direction in which the air is sent out laterally, and a second joint section 230 provided between the downstream end of the first joint section 220 and the blower 10B.

[0073] As shown in Fig. 9(b), the upper solution internal part 210 includes a square tube part 211 with a central axis extending vertically, a reduced part 212 provided above the square tube part 211 and having a tapered upper side, and a downstream remaining amount reduction part 213 provided inside the square tube part 211 to change the oil remaining in the air into droplets and promote the reduction of the remaining oil amount. The downstream remaining amount reduction part 213 is provided with a net-like part such as a wire mesh.

[0074] For the upper solution internal part 210, a flange part 214 for attachment to the intermediate part 300 is provided to protrude outward at the lower end of the square tube part 211. The cross-section of the square tube part 211 is formed as a square, for example, with dimensions of 1200 mm × 1200 mm (opening area S′21 = 1.44 m 2 ). The reduced part 212 is provided on the extension of the central axis of the square tube part 211 and extends upward from the open end at the upper end of the square tube part 211. It is composed of four trapezoidal side parts 212A whose interior gradually becomes smaller from the upstream side to the downstream side. A downstream inspection part is provided on one side part 212A. The downstream inspection part includes an inspection port penetrating the side part 212A of the reduced part 212 and leading into the reduced part 212, and a door part that covers the inspection port in an openable and closable manner. For the upper solution internal part 210, a plate part 215 is provided at the open end downstream of the reduced part 212, and a through hole 216 is provided in the plate part 215.

[0075] The first joint part 220 is a so-called elbow. The open end on the upstream side is formed to be equivalent to the through hole 216 provided in the plate part 215 of the upper solution internal part 210. A packing is placed between the flange part 221 that protrudes outward at the open end on the upstream side and the plate part 215 of the upper solution internal part 210, and they are fixed with bolts, nuts, etc. passed through the respective bolt holes penetrating them. The cross-section of the first joint part 220 is formed as a circle, for example, with dimensions of φ550 (opening area S′22 = 0.23 m 2 ).

[0076] The second joint 230 is configured to reduce the transmission of vibrations from the blower 10B to the first joint 220 by using softer components compared to the first joint 220 and the blower 10B. The second joint 230 comprises a pipe body 231 with open ends that allow air to pass through, made of a resin-coated fabric material such as canvas as the base material, and flanges 232 and 233 provided at both ends of the pipe body 231, which are made of a harder material such as stainless steel. The upstream flange 232 is fixed to the flange 222 at the downstream open end of the first joint 220, and the downstream flange 233 forms the outlet of the exhaust passage 10A and is further connected to the intake of the blower 10B. Furthermore, the exhaust passage 10A, excluding the main pipe body 231 of the second joint 230, is composed almost entirely of stainless steel plates and cylindrical members, including the first porous ventilation section 60, the reinforcing section 320, the intermediate residual volume reduction section 340, and the downstream residual volume reduction section 213.

[0077] (Attachment of the downstream section 200 to the intermediate section 300) The reinforcing portion 320 provided on the vessel-shaped portion 310 functions as a support for the downstream portion 200. The flange portion 214 of the upper guide portion 210 rests on a third mounting surface composed of a third reinforcing portion 323 and a fourth reinforcing portion 324. The flange portion 214 of the upper guide portion 210 is fixed to the third reinforcing portion 323 and the fourth reinforcing portion 324 by welding, or by inserting a packing between the flange portion 214 and the third and fourth reinforcing portions 323 and 324 and fixing it with bolts and nuts that pass through bolt holes that penetrate them, thereby connecting the downstream portion 200 to the intermediate portion 300.

[0078] (Blower device 10B) The blower 10B is configured with an intake port that leads to the exhaust passage 10A facing sideways, and an air outlet that is positioned higher than the intake port and facing upward. As the blower 10B, a sirocco fan can be used, or other blowing means comprising a blower and a duct member housing it inside can be used. The following explanation will proceed using the sirocco fan shown in the illustration. In the illustration, the exhaust section 10 is preferably configured with the blower 10B positioned downstream of the exhaust passage 10A, but the blower 10B may also be positioned upstream of the exhaust passage 10A.

[0079] (Support part 50) The support section 50 includes a flow path support section 50A that supports the exhaust flow path 10A and a fan support section 50B that supports the blower 10B. As shown in Figures 1 to 3, the flow path support section 50A includes a first leg section 51F and a second leg section 51B that support the first reinforcing section 321 (cross member 40A) of the intermediate section 300 of the exhaust flow path 10A. The first leg section 51F and the second leg section 51B are provided separately, and a part of the container-shaped section 310 can fit between the first leg section 51F and the second leg section 51B. The first leg section 51F supports the long cross member 40A provided on the outside of the first side section 311F of the container-shaped section 310 by the first reinforcing section 321, and the second leg section 51B supports the long cross member 40A provided on the outside of the second side section 311B of the container-shaped section 310 by the first reinforcing section 321.

[0080] (Oil Lq1 circulation) The purification device 1 is equipped with an annular route through which oil Lq1, as the treatment liquid, circulates. The annular route consists of pipes dedicated to the treatment liquid, provided on the outside of the upstream section 100 and the intermediate section 300, and the inside of the upstream section 100 and the intermediate section 300. Oil Lq1 accumulated in the deep section 312' is guided to the upstream section 100 via the pipes on the outside of the intermediate section 300 and the upstream section 100, where it is ejected from its interior (air passage), and returns to the deep section 312' through the interior (air passage) of the upstream section 100 and the intermediate section 300, which are used for air supply. Here, Figure 13 is a schematic piping diagram for the treatment liquid of the purification device 1. The purification device 1 includes a liquid outlet 71 provided on the fourth side portion 312R' of the deep portion 312', a first pipe 72 connected to the liquid outlet 71, a strainer 73 with its upstream open end connected to the downstream open end of the first pipe 72, a second pipe 74 connected to the downstream open end of the strainer 73, a pump 75 with its suction port connected to the downstream open end of the second pipe 74, a third pipe 76 piped from the outlet of the pump 75 through a through hole in the upstream portion 100 into the upstream portion 100, and nozzles 77A to 77D provided at the end of the third pipe 76. Oil Lq1 is sent from the deep portion 312' to the nozzles 77A to 77D by the drive of the pump 75.

[0081] The strainer 73 is configured with a split downstream section, where one branch forms the downstream flow path, and the other branch protrudes downward to form a containment section for collecting foreign matter captured by the filter at the branching point. A removable plug is provided at the foreign matter discharge port at the tip, and the foreign matter can be discharged by removing this plug. Other strainer structures can also be used.

[0082] The pump 75 drives the oil Lq1 out of nozzles 77A to 77D into the air flowing through the upstream section 100. The oil Lq1 either travels along the inner surface of the first processing section 110 and the second processing section 120 in the upstream section 100, or falls directly towards the deep section 312', passing through the lower end of the second processing section 120 into the intermediate section 300, where it settles in the deep section 312', which forms the deeper part of the intermediate section. In the purification device 1, the oil Lq1 that comes out of nozzles 77A to 77D returns to the deep section 312' of the intermediate section 300, so the oil Lq1 can be used by circulating it through a circular route.

[0083] Furthermore, the purification device 1 includes a heating device 81 for heating the oil Lq1 and a measuring device 82 for measuring the temperature of the oil Lq1 in the deep part 312', both located in the deep part 312'. In the illustrated example, the heating device 81's heating element 81A and the measuring device 82A are located on the second side surface 312B' of the deep part 312', with the heating element 81A of the heating device 81 and the measuring element 82A of the measuring device 82 protruding into the deep part 312'.

[0084] (Liquid level window) Furthermore, as shown in Figure 3, the third side portion 312L' of the deep portion 312' is provided with a liquid level window for visually inspecting the inside of the deep portion 312'. The liquid level window covers a hole penetrating the deep portion 312' and comprises a transparent material such as glass and a frame that supports it. In the illustrated example, two liquid level windows 83L and 83H are provided separated vertically, so that when water is added to the deep portion 312' in addition to oil Lq1, the lower liquid level window 83L is used to check the interface between water and oil Lq1, and the higher liquid level window 83H is used to check the liquid level of oil Lq1. The liquid outlet 71, heating section 81A, and measuring section 82A of oil Lq1 are located higher than the interface between water and oil Lq1. The lighting device 116 may also be configured to illuminate the inside of the deep portion 312' of the intermediate portion 300.

[0085] (Liquid discharge part) The third side section 311L is further provided with liquid discharge sections. As shown in Figure 3, there are two such sections. One liquid discharge section 84L is positioned closer to the deep bottom section 312bt', while the other liquid discharge section 84H is positioned higher than liquid discharge section 84L. When water is added to the deep section 312' in addition to oil Lq1, if the higher liquid discharge section 84H is positioned higher than the interface with the water, only the oil Lq1 can be discharged. The liquid discharge sections 84L and 84H are equipped with through holes that penetrate the third side section 312L' and liquid discharge pipes located outside the deep section 312' and connected to the through holes. The liquid discharge pipes are equipped with valves or have detachable plugs attached to their open ends to prevent leakage.

[0086] (Fuel filler cap, etc.) Furthermore, as shown in Figure 2, in the intermediate section 300 of the exhaust passage 10A, the plate section 330 is equipped with a liquid supply port 86 that is through the passage and has a detachable closing member such as a lid or cap, and a detection device 87 that is attached to the through-hole and detects when the liquid level has dropped due to insufficient oil Lq1.

[0087] (Control device) The purification device 1 is equipped with a control device 89 for switching the operating states of the blower 10B, the pump 75, the heating device 81, and the lighting device 116. The control device 89 includes an operating section equipped with buttons and switches to control the power supply to the blower 10B, pump 75, heating device 81, and lighting device 116 according to the operator's operation, a box equipped with a case to house the control device and a door to cover the opening of the case. The case has its opening facing sideways, with its wide rear side facing the fan support section 50B, and is fixed to the fan support section 50B via a bracket or directly with bolts and nuts.

[0088] Figure 14 is a perspective view of the exhaust system 90 showing the operation of the purification device 1. In the exhaust system 90, the purification device 1 is located indoors together with other smoke-generating devices 2A and 2B. The purification device 1 is incorporated into an exhaust system that sends air from an inlet located above the other devices 2A and 2B to an outlet provided in the outer wall or ceiling, and exhausts it outdoors. Note that Figure 14 mainly shows the configuration of the exhaust section 10 of the purification device 1, and piping for oil Lq1 and fan support section 50B are omitted. Other smoke-generating devices 2A and 2B include fryers that generate air containing oil and grease, and heating devices that heat steel products coated with oil during hardening, generating soot. The following explanation will use fryers as an example of other devices 2A and 2B.

[0089] In the exhaust system, the first smoke intake hood 91, located on the other devices 2A and 2B, is connected to the first processing unit 110 of the purification device 1 by an upstream duct 92. Also in the exhaust system, the second smoke discharge hood 93, located on the outdoor side, is connected to the blower 10B of the purification device 1 by a downstream duct 94. In the illustrated example, two other devices 2A and 2B are provided as smoke sources, each equipped with a first smoke intake hood 91, and the air from each smoke source is sent to the purification device 1 via a confluence section 92A. Furthermore, downstream of the purification device 1, a joint material 94A is provided, where the cross-sectional area of ​​the airflow is larger on the downstream side and smaller on the upstream side, meaning the downstream side is wider than the upstream side. The number of other devices 2A and 2B and the confluence section 92A are not limited to the illustrated example, nor are the piping configurations of the upstream duct 92 and downstream duct 94 limited to the illustrated example.

[0090] In the purification unit 1, approximately 460 liters of oil Lq1 and approximately 240 liters of water Lq2 are contained in the deep section 312'. The temperature of the oil Lq1 and water Lq2 is maintained at 40°C to 50°C by the heating device 81, and the circulation rate of oil Lq1 by the pump is 20 liters / min. The airflow rate from the blower 10B is 300 m³. 3 The air velocity is / min, and the air velocity at each part of the exhaust flow path 10A is 16.6 m / s at the inlet of the first processing unit 110 of the upstream section 100, 15.1 m / s in the cylindrical body section 121 of the second processing unit 120, 4.8 m / s in the intermediate section 300, 3.5 m / s in the rectangular cylindrical section 211 of the downstream section 200, and 21 m / s at the first joint section 220.

[0091] When the blower 10B is activated, oil-containing air is drawn into the inlet of the first hood 91 and sent to the purification device 1. The temperature of the air entering the inlet 118 of the purification device 1 is 50°C to 60°C. In the purification device 1, the air passes through the upstream section 100, the intermediate section 300, the downstream section 200, and the blower 10B, where a purification process is performed in the upstream section 100 to reduce the amount of oil. As part of the purification process, oil Lq1 is ejected from a nozzle 77A located inside the first processing section 110 toward the first porous ventilation section 60. As the oil contained in the air passes through the multiple fine ventilation holes 621 provided in the first porous ventilation section 60, it combines with the oil Lq1 from the nozzle 77A, reducing the amount of oil contained in the air. When air enters the second processing unit 120, oil Lq1 is also ejected from the nozzles 77B, 77C, and 77D of the second processing unit 120. As a result, the oil contained in the air combines with the oil Lq1 from the nozzles 77B, 77C, and 77D, further reducing the amount of oil contained in the air.

[0092] The oil Lq1 that falls onto the bottom surface 111bt of the horizontal duct section 111 in the first processing unit 110 flows down the slope formed by the bottom surface 111bt and moves into the second processing unit 120 through the hole 114A of the flange section 114. At this time, depending on the amount of oil Lq1 ejected from the nozzle 77A, as shown in Figures 10(a) and (b), the first eaves section P1 and the second eaves section P2 protrude inward from the upper end of the second processing unit 120. Therefore, after the oil Lq1 flows down the bottom surface 111bt of the first processing unit 110, it either hangs down like a curtain from the first eaves section P1 and the second eaves section P2, flows in the direction of extension of the bottom surface 111bt forming the first eaves section P1, or falls into the hollow space of the second processing unit 120. In this way, the oil Lq1 used for purification in the first processing unit 110 also contributes to the purification process by falling into the hollow space of the second processing unit 120.

[0093] Furthermore, the oil Lq1 adhering to the inner surface of the cylindrical body 121 moves into the intermediate section 300 via the lower end of the second processing section 120 and the holes 331 in the plate section 330 that connects with it, and falls into the deep section 312' (liquid reservoir) from the holes 331 in the plate section 330. The oil Lq1 ejected into the upstream section 100, along with the oil that has combined with it, hangs down in a curtain-like or cylindrical manner from the edge of the holes 331 in the plate section 330 towards the deep section 312' below. In this way, in the purification device 1, the oil Lq1 ejected into the upstream section 100 returns to the deep section 312' located below the upstream section 100 due to its own weight. The oil Lq1 collected in the small container-shaped deep section 312' is then used again for purification treatment along with the oil contained in the air.

[0094] As the purified treated air flows through the flow path forming section 311 of the intermediate section 300 and the downstream section 200, some of the oil remaining in the treated air is removed by the intermediate residue reduction section 340 and the downstream residue reduction section 213. In the intermediate residue reduction section 340 and the downstream residue reduction section 213, the oil remaining in the air condenses into droplets, and these droplets fall by their own weight from the mesh section 341 and the like into the shallow bottom section 311bt. The oil Lq1 then descends the slope of the shallow bottom section 311bt and moves further into the deep section 312' from the lower edge of the slope, where it combines with the accumulated oil Lq1. In addition, other foreign matter contained in the air and deposits that fall from the inner surface of the upstream section 100 also fall into the oil Lq1 in the deep section 312'. However, if the other foreign matter has a specific gravity greater than water, it moves from the oil Lq1 side into the water Lq2 and accumulates in the deep bottom section 312bt'. Other foreign matter in the oil Lq1 is collected by the strainer 73.

[0095] The treated air, with its residual volume reduced, is sent by the blower 10B from its outlet into the downstream duct 94, towards the second hood 93, and exhausted outdoors from the outlet of the second hood 93.

[0096] According to the purification device 1, while other smoke-generating devices 2A and 2B are operating, the blower 10B continuously takes in air from the other devices 2A and 2B, uses oil Lq1 as the treatment liquid to remove minute oil particles that cannot be removed by water, and releases the treated air outdoors, thereby further reducing the environmental impact around the factory.

[0097] In conventional treatment devices 900, the area below the treatment cylinder 930 and discharge cylinder 940 is configured as a large liquid reservoir 920, and a large amount of treatment liquid is sent to the nozzle 951 by a pump 950 to create airflow, which may increase electricity costs and presents a challenge in reducing the amount of treatment liquid. In contrast, according to the purification device 1, oil Lq1 is used as the treatment liquid only in the small container-shaped deep section 312', meaning that the oil Lq1 circulates in a ring route in a non-replenishing state without external supply of oil Lq1. Furthermore, in the treatment devices of Patent Documents 3 and 4, the treatment liquid used for air purification is discharged to the outside, which may lead to the use of a large amount of treatment liquid, and it is desirable to circulate some or all of the treatment liquid. The purification device 1 does not have an outlet such as a drain for the oil Lq1 to flow out of the device during the purification process, and the oil Lq1 returns to the deep section 312'. Therefore, a small amount of oil Lq1 contained in the small container-shaped deep section 312' can be used for purification treatment over a long period of time without replenishing the oil Lq1.

[0098] In the purification device 1, a nozzle 77A and a first porous ventilation section 60 are provided in the first processing section 110 where air from the smoke source enters the device to promote the droplet formation of oil contained in the air and reduce the amount of oil. Further downstream, nozzles 77B, 77C, and 77D are provided in the cylindrical body section 121 of the second processing section 120 to further expose the oil contained in the air to the processing space. Oil is also reduced during the process of passing through this cylindrical body section 121. Furthermore, by passing the air through the intermediate residual amount reduction section 340 and the downstream residual amount reduction section 213 in the intermediate section 300, the amount of oil remaining in the air can be further reduced.

[0099] In the purification device 1, the heating device 81 can maintain the oil Lq1 at a predetermined temperature. This allows the use of oil Lq1 with the desired viscosity for the purification process and also suppresses the oxidation of the oil Lq1. Furthermore, by installing another heating device 81 and measuring device 82 for water Lq2 in the deep section 312', the heat exchange between oil Lq1 and water Lq2 can be reduced. The temperature display of the measuring device 82, which is installed outside the deep section 312', allows the operator to check the temperature of the oil Lq1 and water Lq2.

[0100] The deep section 312' has liquid level windows 83L and 83H on its side, allowing the amount of oil Lq1 and water Lq2 inside the deep section 312' to be checked. The second processing section 120 of the upstream section 100 also has a window 124, allowing the state of oil Lq1 being ejected from the nozzle 77B, etc. The first processing section 110 of the upstream section 100 is equipped with a lighting device 116, which illuminates the inside of the second processing section 120, making it easier to see the ejection state.

[0101] The inspection section 125 provided in the upstream section 100 can be used to perform cleaning and replacement work, such as removing deposits from the internal nozzle 77B. Furthermore, the inspection section 350 provided in the intermediate section 300 can be used to separate the first porous section 341H and the second porous section 341L from the first ventilation support section 342H and the second ventilation support section 342L, and remove them to the outside of the device for cleaning and replacement work, such as removing deposits. The first porous section 341H and the second porous section 341L, as the second porous ventilation section, have an opening area (for example, S′3 = 0.9 m²) of the surrounding flow path forming section 311 where the intermediate residual amount reduction section 340 is provided. 2 Compared to the first porous ventilation section 60, it is formed to be smaller, and furthermore, each is constructed to be lighter without a ventilation frame section 61, making it easy to perform tasks such as cleaning and replacement.

[0102] The present invention can be implemented by changing the numerical values, dimensional ratios, and configuration, not limited to the above description and illustrated examples.

[0103] (nozzle) In the illustrated example, four nozzles 77A to 77D are provided in the upstream section 100. One nozzle is provided in the first processing unit 110, and three nozzles are provided in the second processing unit 120, spaced vertically apart. The number of nozzles is not limited to four; one or any other number may be provided. For example, one nozzle may be placed in the first processing unit 110 and another in the second processing unit 120 to constitute the purification device 1. Furthermore, the placement of the nozzles is not limited to the illustrated example, and they may be placed in different positions.

[0104] (e.g., the downstream section of the exhaust flow path) The downstream section 200 that constitutes the exhaust flow path 10A may be constructed using other duct members as long as it rises from the intermediate section 300, for example, the downstream residual amount reduction section 213 of the downstream section 200 and the intermediate residual amount reduction section 340 of the intermediate section 300 can be omitted.

[0105] (First processing section of the exhaust flow path) In Figure 6, the boundaries of the horizontal duct section 111, the direction-changing section 112, and the extension section 113 that constitute the duct body D1 are shown with solid lines. However, the duct body D1 is not limited to being manufactured by welding together the separated horizontal duct section 111, the direction-changing section 112, and the extension section 113. For example, the left side of the duct body D1 may be formed by using a single stainless steel plate to integrally construct the side portion 111L of the horizontal duct section, the side portion 111L of the direction-changing section 112, and the left side portion of the extension section 113 without welding. Similarly, the right side and top surface of the duct body D1 can also be integrally constructed without slit-like boundaries, and the top surface, left side, right side, and bottom surface can be manufactured by welding. Furthermore, Figure 15(a) is a diagram illustrating a modified example of the present invention, showing the lower end 113A of the extension 113 and the flange body 114B in a plan view. The flange body 114B of the first processing unit 110 may have a rectangular opening, similar to the rectangular opening formed by the opening edge of the extension 113, by replacing the shape of the hole 114A with an octagonal hole 114A on the downstream side. In this case, the first processing unit is constructed without the covering plate 114C and the partition plate 117, and the hole 114A of the flange body 114B is composed only of four first edges e1, so the lower end of the bottom surface 111bt (slope) protrudes in an overhang. When the hole 114A is composed only of four first edges e1, the entire outer periphery of the flange body 114B is positioned outside the opening edge of the extension 113. Furthermore, Figure 15(b) is a diagram illustrating a modified example of the present invention, showing a cross-section of a part of the duct body D1 and the cylindrical body 121. In the above description, the direction-changing section 112 is composed of a curved surface 112A and two side surfaces 112L and 112R, but it can be configured as a cylindrical shape using four members. For example, if the duct body D1 has a bottom extension section 112bt formed on a slope or curved surface that is more inclined than the bottom surface 111bt between the bottom surface 111bt of the horizontal duct section 111 and the extension section 113, the bottom extension section 112bt extends from the bottom surface 111bt of the horizontal duct section 111, and at least a part of it can be configured to protrude like an overhang from the upper end of the cylindrical body 121 of the second processing section. If the hole 114A of the flange body 114 is octagonal, then a first eaves portion P1 and a second eaves portion P2 are provided. Unlike the above embodiment, the first eaves portion P1 has a bottom extension portion 112bt extending from the bottom surface portion 111bt, a side portion 113C extending downward from the lower end of the bottom extension portion 112bt, and an outward projection portion P that protrudes outward from the lower end of the side portion 113C to the outside of the extension portion 113. OUT It is constructed in such a way that a part of the lower end of the bottom extension protrudes out like an eaves. Also, if the hole 114A of the flange body 114 is square, a first eaves-like portion P1 is provided, and unlike the above embodiment, the first eaves-like portion P1 consists of a bottom extension portion 112bt extending from the bottom surface portion 111bt, a side portion 113C extending downward from the lower end of the bottom extension portion 112bt, and an outward projection P that extends outward from the lower end of the side portion 113C to the outside of the extension portion 113. OUT The structure is formed such that the lower end of the bottom extension 112bt protrudes like an eaves. Note that, as shown in Figure 15(c), the extension 113 is omitted to form the duct body D1, and the first eaves-like part P1 is formed from the bottom extension 112bt and the outward protruding part P OUT It may also consist of the following: Although not shown in the diagram, if the duct body D1 is composed of a horizontal duct section 111 and a direction-changing section 112, and the direction-changing section 112 is composed of a curved surface section 112A and two side sections 112L and 112R, and there is no bottom extension section 112bt or extension section 113, then the opening edge that constitutes the downstream opening of the duct body D1 is formed in a rectangular shape by the lower end (straight edge) of the slope formed by the horizontal duct section 111 and the lower end (three straight edges) of the direction-changing section 112. If the hole 114A of the flange body 114 is octagonal, then a first eaves section P1 and a second eaves section P2 are provided, and unlike the above embodiment, the first eaves section P1 consists of the bottom surface section 111bt of the horizontal duct section 111 and an outward projection P that extends outward from the lower end of the bottom surface section 111bt. OUT It is composed of the following, and a part of the lower end of the bottom surface portion 111bt (slope) is provided to protrude in an overhang shape. Also, if the hole 114A of the flange body portion 114 is square, a first overhang portion P1 is provided, and unlike the above embodiment, the first overhang portion P1 consists of the bottom surface portion 111bt of the horizontal duct portion 111 and an outward projection P that extends outward from the lower end of the bottom surface portion 111bt. OUT It is composed of and , and the lower end of the bottom portion 111bt (slope) is provided to protrude in an overhang shape.

[0106] (Second porous ventilation section of the exhaust passage) The present invention is not limited to two ventilation support parts supporting the second porous ventilation section, and can be implemented by changing the number of ventilation support parts. Figure 16 is a diagram illustrating a modified example of the intermediate residual amount reduction section of the present invention. The intermediate residual amount reduction section 340 may be composed of a first ventilation support section 342H and a plurality of first porous sections 341H, omitting the second ventilation support section 342L and the plurality of second porous sections 341L connected thereto. Figures 17(a) to 17(d) are diagrams illustrating other modifications of the intermediate residual amount reduction section of the present invention, and represent a cross-section of a part of the purification device along the S5-S5 line in Figure 3. The intermediate residual amount reduction section shown in Figure 17(a) is similar to the intermediate residual amount reduction section 340 in Figure 16 in that the second ventilation support section 342L and the multiple second porous sections 341L that are attached to it are omitted, and the bent section 341B of the first porous section 341H is composed of multiple hook-shaped metal fittings, each fitting protruding separately from the end of the ventilation body section 341A. The first porous section 341H rests the lower end of the ventilation body section 341A on the shallow bottom section 311bt, and the ventilation body section 341A is tilted with its upper end shifted downstream of its lower end towards the fourth side section 311R. Multiple first porous sections 341H are arranged in the longitudinal direction of the first ventilation support section 342H such that they partially overlap with adjacent ones. Furthermore, as shown in Figure 17(b), the first porous section 341H may be suspended from the first ventilation support section 342H such that a gap is created between the lower end of the ventilation body section 341A and the shallow bottom section 311bt. Unlike the intermediate residual amount reduction section 340 shown in Figure 12(a), the intermediate residual amount reduction section shown in Figures 17(c) and 17(d) includes a third ventilation support section 342M in addition to the first ventilation support section 342H and the second ventilation support section 342L. In the intermediate residual volume reduction section shown in Figure 17(c), the third ventilation support section 342M is provided parallel to the short edge of the opening 311A ​​of the container-shaped section 310, similar to the first ventilation support section 342H and the second ventilation support section 342L. In the illustrated example, the third ventilation support section 342M is provided at a lower position than the first ventilation support section 342H, and furthermore, to prevent it from being aligned vertically with the first ventilation support section 342H, the third ventilation support section 342M, which is provided at a lower position, is provided at a position shifted downstream towards the fourth side surface 311R compared to the first ventilation support section 342H, which is provided at a higher position. Furthermore, the third ventilation support section 342M is positioned higher than the second ventilation support section 342L, and in the illustrated example, the second ventilation support section 342L, which is positioned lower, is positioned downstream of the third ventilation support section 342M, which is positioned higher, so as not to be aligned vertically with the second ventilation support section 342L. The third porous section 341M, like the first porous section 341H, is composed of a ventilation body section 341A and a bent section 341B, and multiple third porous sections 341M are arranged in the longitudinal direction of the third ventilation support section 342M such that they partially overlap with adjacent ones. The second porous section 341L, supported by the second ventilation support section 342L, has its lower end resting on the shallow bottom section 311bt; the third porous section 341M, supported by the third ventilation support section 342M, has its lower end resting on the ventilation body section 341A of the second porous section 341L, which is connected to the second ventilation support section 342L; and the first porous section 341H, supported by the first ventilation support section 342H, has its lower end resting on the ventilation body section 341A of the third porous section 341M, which is connected to the third ventilation support section 342M. When multiple ventilation support sections are provided, the configuration is not limited to the example in which the ventilation support section provided at a lower position is positioned downstream of the fourth side section 311R compared to the ventilation support section provided at a higher position. Alternatively, the ventilation support section provided at a lower position may be positioned upstream of the third side section 311L compared to the ventilation support section provided at a higher position, or some of the multiple ventilation support sections provided at a lower position may be positioned upstream of the third side section 311L. The intermediate residual amount reduction section shown in Figure 17(d) includes a first ventilation support section 342H, a second ventilation support section 342L, and a third ventilation support section 342M, with the second ventilation support section 342L positioned upstream of the first ventilation support section 342H and the third ventilation support section 342M.

[0107] (First reticular layer and second reticular layer) In this embodiment, the first porous portion 341H and the second porous portion 341L of the intermediate residual amount reduction portion 340 are shown as the second porous ventilation portion, and are composed of the mesh portion 620 of the first porous ventilation portion 60. However, the first mesh portion of the first porous ventilation portion 60 and the second mesh portion of the second porous ventilation portion may be composed of different shapes, sizes, and numbers of ventilation holes.

[0108] (Air blower) In an exhaust system incorporating the purification device 1, in addition to the blower 10B of the purification device 1, other blowers may be provided in the upstream duct 92 and the downstream duct 94. For the installation of the blower 10B, instead of the fan support section 50B rising from the floor or other surface of the installation location, it may be fixed to a structure such as a wall or ceiling.

[0109] (Processing solution) The amount of oil Lq1 to be placed in the deep section 312' is not limited to the upper end of the deep section 312', but can also be increased so that part or all of the shallow section 311bt is covered. In this embodiment, two liquid level windows are provided, but instead, a single liquid level window may be provided that allows for wide-ranging monitoring of the liquid level from the deep section 312bt' to the shallow section 311bt or a position higher than the shallow section 311bt. In this embodiment, oil and water are placed in the deep part of the intermediate section 300, but only oil may be placed there. Also, although oil was used for air containing oil or oil fumes, water or aqueous solutions may be used instead of oil, and the treatment liquid may be used according to the target air, targeting not only foreign oil and oil fumes contained in the air to be treated, but also VOCs and other harmful substances.

[0110] (Middle section) In the container-shaped section 310, taking Figure 1 as an example, if we consider the front, back, left, and right sides of the device, the first side surface 311F of the air-blowing side flow path forming section 311 and the first side surface 312F' of the liquid reservoir side deep section 312' form one plane facing the front (first direction) of the device. On the opposite side, the second side surface 311B of the air-blowing side flow path forming section 311 and the second side surface 312B' of the liquid reservoir side deep section 312' form one plane facing the rear (second direction) of the device. On the left side, the third side surface 311L of the air-blowing side flow path forming section 311 and the third side surface 312L' of the liquid reservoir side deep section 312' form one plane facing the left (third direction) of the device. Thus, instead of having one side of the flow path forming section 311 and the deep section 312' flush with each other, the flow path forming section 311 and the deep section 312' may be connected via a stepped section, with one side being offset. Furthermore, the deep section that mainly contains the processing liquid may be a ball shape instead of a rectangular parallelepiped shape with a deep bottom that is flat, sloped, or valley-shaped, and the opening at the upper end may be configured to connect to the flow path forming section 111 via a stepped section. The intermediate section 300, which constitutes the lowest part of the flow path, may be a rectangular parallelepiped type, such as a conventional liquid reservoir 920, instead of a non-rectangular container-shaped section 310, and the treated liquid may also be stored below the downstream section 200.

[0111] (circulation) In the embodiment, a method of use was described in which only the processing liquid placed in the deep section 312' of the intermediate part is circulated. However, it can also be used in a manner in which a portion is discarded while replenishing from another supply source and circulating the rest. For example, the liquid discharge sections 84H and 84L are connected to a drain pipe, and a liquid supply port 86 or other supply port is provided and connected to a supply source via piping to configure the device.

[0112] (Installation location) The installation location is not limited to factories, nor is it restricted to commercial use such as hospitals and multi-purpose facilities; it can also be installed outdoors, not just indoors. [Explanation of Symbols]

[0113] 1. Purification device 10 Exhaust section 10A Exhaust passage 10B Air blower 100 Upstream section 110 First Processing Unit 120 Second Processing Unit 121 Cylinder body 123 Window section 200 downstream 300 Middle section 310 Vessel-shaped part 320 Reinforcement section 330 Plate section 50A Exhaust flow path support section 50B Fan Support Section

Claims

1. an exhaust flow path that is hollow and has an inlet at one end and an outlet at the other end; and a blower that sends the air from the inlet to the outlet, the exhaust flow path includes an upstream section having the inlet and guiding air to a position lower than the inlet, a downstream section rising next to the upstream section and having the outlet provided at a higher portion, and an intermediate section provided below the upstream section and the downstream section to constitute the lowest portion of the exhaust flow path, guiding the air from a lower end of the upstream section to a lower end of the downstream section and utilizing a part of the inside to store the treatment liquid, The upstream portion includes a first processing portion having at least one first nozzle, and a second processing portion having at least one second nozzle and provided downstream of the first processing portion, a purification device which sends the treatment liquid stored in the intermediate section to the first nozzle and the second nozzle, collects the treatment liquid discharged from the first nozzle and the second nozzle in the intermediate section, and circulates at least a portion of the treatment liquid for use; the first processing section includes a horizontal duct section having an axis extending horizontally and a rectangular cross section with an upstream opening forming the inlet, the first nozzle provided inside the horizontal duct section, and at least one first porous vent provided inside the horizontal duct section downstream of the first nozzle, The second processing unit includes a cylindrical tube main body having an axis extending in the vertical direction, and the second nozzle provided inside the tube main body, the first multi-hole ventilation portion includes a ventilation frame portion and a plurality of first mesh portions provided inside the ventilation frame portion and allowing the air to pass from the upstream side to the downstream side; A purification device, wherein the plurality of first mesh portions are provided overlapping with each other or spaced apart from each other and lined up from the upstream side to the downstream side.

2. The second processing section is provided at an upper open end of the tube body section and includes a flange section connected to the first processing section, The first processing unit is a duct body having the side duct section and a direction changing section provided downstream of the side duct section for changing the direction of the inflowing air downward, the duct body having a downstream opening (hereinafter referred to as the downstream opening) formed in a rectangular shape and facing downward; a flange connection portion having a hole with an opening area smaller than that of the downstream opening, closing four corner regions of the downstream opening, and connected to the flange portion of the tube main body portion of the second processing portion with a packing interposed therebetween; The purification device according to claim 1, further comprising two partition plate portions which partition off the corners of the two angular regions at the lower end side of the curved portion of the direction change portion, which rises from the flange connection portion and has an arc-shaped cross section along an imaginary vertical plane inside the duct main body, as non-ventilation spaces which are not used for blowing air.

3. The first processing unit includes a lighting device that illuminates the inside of the second processing unit, and a direction changing unit that is provided downstream of the horizontal duct unit and changes the direction of the air that flows in downward, The illumination device includes a light guide portion penetrating the curved surface portion of the direction changing portion, and a light source portion provided above or on the light guide portion, on an extension of the axis of the tube main body portion of the second processing portion; The light guide portion includes a cylindrical through-hole and a light-transmitting member provided inside the through-hole to prevent gas and liquid from passing through the through-hole.

2. The purification device according to claim 1, wherein the cylindrical main body of the second treatment section is provided with a window for visually observing the inside.

4. A purification device as described in claim 2, characterized in that the flange connection portion protrudes inward beyond the upper end of the tubular main body portion.

5. An exhaust passage having a hollow structure and an inlet at one end and an outlet at the other end, and a blower for blowing the air from the inlet to the outlet, the exhaust flow path includes an upstream section having the inlet and guiding air to a position lower than the inlet, a downstream section rising next to the upstream section and having the outlet provided at a higher portion, and an intermediate section provided below the upstream section and the downstream section to constitute the lowest portion of the exhaust flow path, guiding the air from a lower end of the upstream section to a lower end of the downstream section and utilizing a part of the inside to store the treatment liquid, The upstream portion includes a first processing portion having at least one first nozzle, and a second processing portion having at least one second nozzle and provided downstream of the first processing portion, a purification device which sends the treatment liquid stored in the intermediate section to the first nozzle and the second nozzle, collects the treatment liquid discharged from the first nozzle and the second nozzle in the intermediate section, and circulates at least a portion of the treatment liquid for use; The first processing section includes a horizontal duct section having an axis extending horizontally and an opening on an upstream side forming the inlet, and the first nozzle is provided inside the horizontal duct section, The second processing unit includes a cylindrical tube main body having an axis extending in the vertical direction, and the second nozzle provided inside the tube main body, the intermediate section includes a flow path forming section formed in the shape of a rectangular parallelepiped container with a rectangular opening at the top and a height set smaller than the dimension of the long side edge of the opening, a deep section provided below the flow path forming section and formed in the shape of a small container with a smaller volume than the flow path forming section, for containing the treatment liquid, at least one ventilation support section provided on the flow path forming section in the shape of a rod parallel to the short side edge of the opening, and a plurality of second porous ventilation sections extending over the ventilation support section and aligned in the longitudinal direction of the ventilation support section, the flow passage forming portion comprises a first side portion and a second side portion forming the long side edge, a third side portion forming one of the short side edges and provided on the upstream side, a fourth side portion forming the other short side edge and provided on the downstream side, and a shallow bottom portion connected to lower ends of the first side portion, the second side portion, and the fourth side portion, The mouth of the deep portion is provided at a lower edge of the inclined surface formed by the shallow bottom portion and is provided below the tube main body portion of the second processing portion, The flow path forming portion is provided with an inspection hatch that can be opened and closed on the first side surface portion or the second side surface portion, The plurality of second porous ventilation sections are provided with a ventilation main body and a bent portion protruding from the end of the ventilation main body and engaging with the ventilation support portion, and are configured to a size that allows them to be inserted and removed through the inspection hatch, and at least the ventilation main body is configured by overlapping a plurality of second mesh sections that pass the treated air from the upstream side to the downstream side.

6. the intermediate portion further includes a frame-shaped reinforcing portion provided around the opening of the flow passage forming portion, and an inner reinforcing portion provided inside the frame-shaped reinforcing portion parallel to the short side edge, with its ends passing through notched reinforcing passing portions at the upper ends of the first side portion and the second side portion, and dividing the inside of the frame-shaped reinforcing portion into an upstream opening on the third side portion side and a downstream opening on the fourth side portion side, The ventilation support portion includes a first ventilation support portion on the third side surface portion side at the downstream opening or below the downstream opening and close to the inner reinforcement portion, and a second ventilation support portion below the downstream opening, at a position lower than the first ventilation support portion, and shifted toward the fourth side surface portion from the first ventilation support portion, The second porous ventilation portion includes a plurality of first porous portions aligned in the longitudinal direction of the first ventilation support portion and partially overlapping the first ventilation support portion, and a plurality of second porous portions aligned in the longitudinal direction of the second ventilation support portion and partially overlapping the second ventilation support portion, the second porous portion has a lower end placed on the shallow bottom portion with a position shifted toward the fourth side surface portion relative to an upper end, the first porous portion has a lower end placed on the second porous portion, and the first porous portion and the second porous portion are inclined, The purification device described in claim 5, characterized in that the first side portion or the second side portion has an inspection hatch that is shifted toward the fourth side portion from the ends of the first ventilation support portion and the second ventilation support portion at a portion rising from the edge of the shallow bottom portion.

7. 7. The purification device according to claim 5, wherein the bent portion of the second porous ventilation portion is formed by overlapping a plurality of the second mesh portions together with the ventilation main body portion.

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