Dry dust collector for grain dryers

Abstract

To obtain a dry dust collector for a grain dryer capable of collecting not only dust discharged from the grain dryer but also dust discharged from a dust discharger of the grain dryer. [Solution] A dry dust collector 10 for a grain dryer comprising an inlet 26 through which exhaust gas discharged from a grain dryer 17 is introduced, a duct body 22 which separates dust from the exhaust gas introduced from the inlet 26 by a swirling flow, a separation section 20 having a discharge outlet 28 which discharges the dust-removed exhaust gas from which dust has been separated in the duct body 22 to the outside, and a collection section 30 which is connected to a discharge outlet 22A formed downstream of the swirling flow on the discharge outlet 28 side of the duct body 22 and collects the dust separated in the duct body 22, wherein an impeller which is rotated to generate a swirling flow inside the duct body 22 is provided inside the inlet 26 side of the duct body 22, and an intake 22B to which a dust extractor of the grain dryer 17 is connected is formed upstream of the swirling flow on the discharge outlet 28 side of the duct body 22.

Description

[Technical field]

[0001] The present invention relates to a dry dust collector for a grain dryer. [Background technology]

[0002] 2. Description of the Related Art Dry dust collectors for grain dryers that use a fixed swirling flow generator to centrifuge dust discharged from a grain dryer that dries grains such as rice have been known for some time (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 55-068552 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the fixed-type swirl flow generator does not have high dust collection performance because it is structured to generate the swirl flow required to centrifuge dust by using the force of the air blown (exhaust) from the blower in the grain dryer. Therefore, there is a problem that a separate dust collector is required to collect dust discharged from the dust exhauster of the grain dryer in addition to the dust collector for collecting dust discharged from the grain dryer.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, an object of the present invention is to provide a dry-type dust collector for a grain dryer that can collect not only the dust discharged from the grain dryer, but also the dust discharged from the dust exhauster of the grain dryer. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the dry dust collector for a grain dryer of the first aspect of the present invention comprises a separation section having an inlet through which exhaust gas discharged from a grain dryer is introduced, a duct body that separates dust from the exhaust gas introduced from the inlet by a swirling flow, and an outlet through which the dust-removed exhaust gas from which dust has been separated in the duct body is discharged to the outside, and a collection section that is connected to an outlet formed downstream of the swirling flow on the outlet side of the duct body and collects the dust separated in the duct body, wherein an impeller that is rotationally driven to generate the swirling flow inside the duct body is provided inside the inlet side of the duct body, and an intake to which a dust collector of the grain dryer is connected is formed upstream of the swirling flow on the outlet side of the duct body.

[0007] According to the first aspect of the invention, an impeller is provided inside the inlet side of the duct body in the separation section, which generates a swirling flow inside the duct body when driven to rotate. A collector that collects dust separated by the duct body is connected to an outlet formed downstream of the swirling flow on the outlet side of the duct body, and an intake to which a dust collector of a grain dryer is connected is formed upstream of the swirling flow on the outlet side of the duct body.

[0008] Therefore, dust discharged from the dust exhauster of the grain dryer can also be introduced into the duct body and collected in the collection section together with the dust discharged from the grain dryer. In other words, according to the present invention, not only dust discharged from the grain dryer but also dust discharged from the dust exhauster of the grain dryer can be collected.

[0009] A second aspect of the dry dust collector for a grain dryer according to the present invention is the dry dust collector for a grain dryer of the first aspect, wherein the exhaust outlet and the intake are of the same configuration.

[0010] According to the second aspect of the invention, the exhaust port and the intake port have the same configuration, so that the rotation direction of the swirling flow generated inside the duct body is selected according to the rotation direction of the blower in the grain dryer, and the exhaust port and the intake port can be set according to the rotation direction of the swirling flow.

[0011] Furthermore, a third aspect of the dry dust collector for a grain dryer according to the present invention is a dry dust collector for a grain dryer of the first or second aspect, wherein the separation section is supported by a plurality of pillars, and the collection section is supported on at least one of the plurality of pillars via a support member.

[0012] According to the third aspect of the invention, the separating section is supported by a plurality of columns, and the collecting section is supported by at least one of the plurality of columns via a support member. This increases the degree of freedom in setting the dust collection bag attached to the lower end of the collecting section, and makes it possible to attach and detach the dust collection bag using a loading and transporting device. Effect of the Invention

[0013] As described above, according to the present invention, it is possible to collect not only the dust discharged from a grain dryer, but also the dust discharged from the dust discharger of the grain dryer. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic perspective view showing a dry dust collector for a grain dryer according to an embodiment of the present invention. FIG. [Diagram 2] 1 is a schematic perspective view showing a main part of a dry dust collector for a grain dryer according to an embodiment of the present invention. FIG. [Diagram 3] FIG. 11 is a schematic perspective view showing a main part of a dry-type dust collector for a grain dryer according to a modified example of the present embodiment. [Figure 4] 2 is a schematic plan view showing a separation section of the dry dust collector for a grain dryer according to the embodiment. FIG. [Diagram 5] FIG. 2 is a schematic plan view showing the position of a collection unit of the dry dust collector for a grain dryer according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. For ease of explanation, a dry dust collector 10 for a grain dryer (hereinafter, sometimes simply referred to as "dust collector 10") according to this embodiment will be referred to as a "front view" when viewed from the downstream side of the exhaust air direction in which the exhaust air flows, and as a "side view" when viewed from a horizontal direction perpendicular to the exhaust air direction.

[0016] Moreover, both side portions when the dust collector 10 is viewed from the front are referred to as left and right side portions. That is, the left and right direction of the dust collector 10 is the left and right direction when the dust collector 10 is viewed from the front. Moreover, hereinafter, the upstream side in the exhaust direction in which the exhaust gas flows (upstream side of the swirling flow) may be simply referred to as the "upstream side", and the downstream side in the exhaust direction in which the exhaust gas flows (downstream side of the swirling flow) may be simply referred to as the "downstream side".

[0017] As shown in Fig. 1, the dust collector 10 includes a separation section 20 and a collection section 30. The separation section 20 has a substantially cylindrical duct body 22 arranged so that the axial direction is horizontal. The duct body 22 is supported by a support frame 12. The support frame 12 has four pillars 14, and the four corners of the duct body 22 are attached to the upper part of each pillar 14. That is, the upstream end and the downstream end on both the left and right sides of the duct body 22 in a front view are attached to the upper part of the pillars 14. In addition, the lower parts of adjacent pillars 14 are connected by a connecting frame 16.

[0018] A circular inlet 26 having an inner diameter smaller than the outer diameter of the duct body 22 in a front view is coaxially formed at the upstream end of the duct body 22. A circular outlet 28 having an inner diameter smaller than the outer diameter of the duct body 22 in a front view is coaxially formed at the downstream end of the duct body 22. Specifically, a cylindrical portion 23 having a smaller diameter and shorter length than the duct body 22 is coaxially attached to the downstream end of the duct body 22, and the outlet 28 is located at the downstream end of the cylindrical portion 23.

[0019] The downstream end of an exhaust gas inlet 18 that introduces exhaust gas discharged from a grain dryer 17 that dries grains such as rice is connected to the inlet 26. The exhaust gas discharged from the exhaust gas inlet 18 and introduced from the inlet 26 flows along a swirling flow inside the duct main body 22 toward the outlet 28, while dust is centrifuged and removed from the exhaust gas. The dust-removed exhaust gas (clean exhaust gas from which dust has been removed) that has been removed by flowing inside the duct main body 22 is discharged from the outlet 28 to the outside (atmosphere).

[0020] Also, as shown in Figures 1 and 2, the upper end of a collection section 30 that collects dust that has been collected on the inner surface side of the duct body 22 by centrifugal separation inside the duct body 22 is connected to the upper end of one of the left and right sides (the right side in Figure 2) of the downstream end of the duct body 22 when viewed from the front by a duct hose 34.

[0021] That is, one end of the duct hose 34 is connected to the exhaust port (exhaust pipe) 22A of the duct main body 22, and the other end of the duct hose 34 is connected to the upper end of the collection section 30. Note that this exhaust port 22A is located above the upper end of the duct main body 22 when viewed from the front. Also, dust is collected between the inner circumferential surface at the downstream end of the duct main body 22 and the outer circumferential surface of the cylindrical section 23.

[0022] The collection unit 30 is supported at its approximate vertical center by a support bracket 32 ​​serving as a support member on a support column 14 disposed at the downstream end on one left-right side (the right side in FIG. 2) of the duct body 22. As shown in FIG. 1, the lower end of the collection unit 30 is connected to the upper end of a flexible container bag 38 serving as a dust collection bag for containing the collected dust.

[0023] 1 and 2, a dust collector (not shown) of the grain dryer 17 is connected to an upper end portion of the other side in the left-right direction (the left side in FIG. 2) of the downstream end portion of the duct main body 22 by a duct hose 36. That is, one end portion of the duct hose 36 is connected to an intake port (intake pipe) 22B of the duct main body 22, and the other end portion of the duct hose 36 is connected to the dust collector of the grain dryer 17. Note that this intake port 22B is also located above the upper end portion of the duct main body 22 in a front view.

[0024] 2, dust introduced from the dust extractor of the grain dryer 17 to the downstream end of the duct body 22 moves about 3 / 4 of the way around the inner circumferential surface of the downstream end of the duct body 22 in a straight line in the shortest distance in a side view due to the swirling flow generated inside the duct body 22, and is collected by the collection section 30. In this way, the swirling flow inside the duct body 22 shown in FIG. 2 is a swirling flow (vortex flow) that rotates spirally in the counterclockwise direction in a front view.

[0025] One end of duct hose 34, the other end of which is connected to the upper end of collection section 30, and one end of duct hose 36, the other end of which is connected to the dust extractor of grain dryer 17, are attached to outlet 22A and inlet 22B, respectively, in accordance with the rotation direction of the swirling flow generated inside duct body 22. That is, in the case of a swirling flow that rotates in the opposite direction (clockwise direction when viewed from the front) to that shown in Fig. 2, one end of duct hose 34 and one end of duct hose 36 need to be connected in reverse left-right, as shown in Fig. 3.

[0026] 4, the discharge outlet (discharge pipe) 22A to the collection section 30 in the duct body 22 and the intake (intake pipe) 22B from the dust collector of the grain dryer 17 have the same (bilaterally symmetrical) configuration. Thus, in this embodiment, in accordance with the rotation direction of the swirling flow generated inside the duct body 22, one of the left and right sides serves as the discharge outlet 22A to which one end of the duct hose 34 is attached, and the other of the left and right sides serves as the intake 22B to which one end of the duct hose 36 is attached.

[0027] An impeller 40 (shown in simplified form by a phantom line in FIG. 4), whose rotation axis direction is the axial direction of the duct body 22, is provided inside the duct body 22 on the inlet 26 side so as to be rotatable in both forward and reverse directions by the drive unit 24. The impeller 40 is formed in a shape capable of generating a swirling flow toward the outlet 28 side whether it is rotating in the forward direction or the reverse direction, and the separation section 20 is configured to generate a swirling flow (vortex flow) inside the duct body 22 by the rotation of the impeller 40.

[0028] Here, the rotation direction of the swirling flow (impeller 40) needs to match the rotation direction of the blower (fan) (not shown) in the grain dryer 17. A vortex occurs in the exhaust air sent by the blower, and matching the rotation direction of this vortex with the rotation direction of the swirling flow improves dust collection efficiency. Therefore, the rotation direction of the swirling flow is selected according to the rotation direction of the blower in the grain dryer 17 to which the dust collector 10 is attached. Note that, in the duct main body 22, the portion housing the impeller 40 is preferably a tapered portion whose inner diameter increases toward the discharge port 28 side. This allows the swirling flow to be generated more smoothly.

[0029] 1 to 3 is attached via a support bracket 32 ​​to a support column 14 arranged at the downstream end on one side (right side) in the left-right direction of the duct body 22, but the installation position of the collection section 30 is not limited thereto. As shown in Fig. 5, the collection section 30 may be attached via a support bracket 32 ​​to a support column 14 arranged at the upstream end on one side (right side) in the left-right direction of the duct body 22, or may be attached via a support bracket 32 ​​to a support column 14 arranged at the downstream end or upstream end on the other side (left side) in the left-right direction of the duct body 22.

[0030] Next, the operation of the dust collector 10 according to this embodiment having the above-mentioned configuration will be described.

[0031] As described above, inside the separation section 20 on the inlet 26 side of the duct body 22, there is provided the impeller 40 which is rotationally driven by the drive unit 24 to generate a swirling flow inside the duct body 22. The collector 30 which collects dust separated in the duct body 22 is connected to the discharge outlet 22A formed on the downstream side of the swirling flow on the discharge outlet 28 side of the duct body 22, and the intake 22B to which the dust collector of the grain dryer 17 is connected is formed on the upstream side of the swirling flow on the discharge outlet 28 side of the duct body 22.

[0032] Therefore, dust discharged from the dust exhauster of the grain dryer 17 can also be introduced into the duct body 22 and collected by the collection section 30 together with the dust discharged from the grain dryer 17. In other words, according to the dust collector 10 of this embodiment, a single dust collector 10 can collect not only the dust in the exhaust gas discharged from the grain dryer 17 (by the blower), but also the dust discharged from the dust exhauster of the grain dryer 17.

[0033] Also, the exhaust port 22A and the intake port 22B in the duct body 22 have the same configuration. Therefore, the rotation direction of the swirling flow generated inside the duct body 22 is selected according to the rotation direction of the blower (fan) in the grain dryer 17, and the exhaust port 22A and the intake port 22B can be easily set according to the rotation direction of the swirling flow. In other words, the dust collector 10 according to this embodiment can be attached regardless of the type of grain dryer 17 (the rotation direction of the blower), and can be used with grain dryers 17 with a wide range of stone numbers.

[0034] Furthermore, dust introduced from the dust exhauster of the grain dryer 17 to the downstream end of the duct body 22 moves in a straight line along the inner circumferential surface of the downstream end of the duct body 22 in a side view in the shortest distance due to the swirling flow generated inside the duct body 22, and is collected by the collection section 30. Therefore, the risk of dust discharged from the dust exhauster of the grain dryer 17 leaking to the outside can be greatly reduced.

[0035] Moreover, according to the dust collector 10 of this embodiment, the separation section 20 is supported by four pillars 14, and the collection section 30 is supported by one of the four pillars 14 via a support bracket 32. This increases the degree of freedom in installation of the flexible container bag 38 attached to the lower end of the collection section 30. Furthermore, since dust is collected by the flexible container bag 38, the replacement interval can be made longer.

[0036] In addition, since the flexible container bag 38 only needs to be connected to the lower end of the collection unit 30, the work of attaching and detaching the flexible container bag 38 by the user (the burden on the user) is reduced compared to the case where another flexible container bag 38 is connected to the dust discharger of the grain dryer 17 to collect the dust discharged from there. Furthermore, the flexible container bag 38 can be attached and detached using a cargo handling and transporting device such as a handlift or forklift, and the labor required to process the collected dust is also reduced.

[0037] The dry dust collector 10 for a grain dryer according to this embodiment has been described above with reference to the drawings. However, the dry dust collector 10 for a grain dryer according to this embodiment is not limited to the one shown in the drawings, and the design can be modified as appropriate without departing from the gist of the present invention.

[0038] For example, the collection unit 30 may be configured to be supported by two of the four support columns 14 that are arranged on either the left or right side of the duct body 22 and spaced apart in the axial direction, via the support bracket 32. In other words, it is sufficient that the collection unit 30 is configured to be supported by at least one of the multiple support columns 14 (four in the illustrated example) via the support bracket 32. [Explanation of symbols]

[0039] 10 Dust collector (dry type dust collector for grain dryer) 14 Posts 20 Separation part 22 Duct body 22A outlet 22B Intake 26 Introduction 28 Outlet 30 Collection section 32 Support bracket (support member) 40 Impeller

Claims

1. a separation section having an inlet into which exhaust gas discharged from a grain dryer is introduced, a duct body that separates dust from the exhaust gas introduced from the inlet by a swirling flow, and a discharge port that discharges the dust-removed exhaust gas from which dust has been separated by the duct body to the outside; a collector connected to an outlet formed on a downstream side of the swirling flow at the discharge port side end of the duct body and configured to collect dust separated by the duct body; Equipped with An impeller is provided inside the inlet side of the duct body and is rotationally driven to generate the swirling flow inside the duct body, A dry dust collector for a grain dryer, wherein an intake to be connected to a dust discharger of the grain dryer is formed on the upstream side of the swirling flow at the discharge port side end of the duct body.

2. A separation section having an inlet into which exhaust gas discharged from a grain dryer is introduced, a duct body which separates dust from the exhaust gas introduced from said inlet by a swirling flow, and a discharge outlet which discharges to the outside the dust-removed exhaust gas from which dust has been separated by said duct body; a collector connected to an outlet formed on a downstream side of the swirling flow at the discharge port side of the duct body and configured to collect dust separated by the duct body; Equipped with An impeller is provided inside the inlet side of the duct body and is rotationally driven to generate the swirling flow inside the duct body, An intake port to which a dust collector of the grain dryer is connected is formed on the upstream side of the swirling flow on the discharge port side of the duct body, A dry dust collector for a grain dryer, wherein the exhaust outlet and the intake are of the same configuration.

3. The separation portion is supported by a plurality of columns, 3. The dry dust collector for a grain dryer according to claim 1, wherein the collection section is supported by at least one of the plurality of supports via a support member.

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