JP2000033288A - Cyclone type classifying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cyclone type classifying apparatus in which fine dust of low specific gravity such as bran dust, hulls and straw is removed and in which granular particles of high specific gravity such as cleaned grains, immature grains and broken grains can be recovered. SOLUTION: A granular-particles-recovering hole 14 is provided in the peripheral part 9 of a large diameter cylinder 3 in the tangential-line 9a-direction of a swirl current, a separation part 8 to catch the granular particles is connected to the granular-particles-recovering hole 14, further a slit-type dust- containing-air suction hole 11 is provided in the peripheral part 9 located oppositely to the recovering hole 14, and the air suction hole 11 and a dust- containing-air exhaust cylinder 7 are connected through a pipe line 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used, for example, as a dust collector for collecting dust and refuse discharged in a milling process of a rice mill or a mill, or as a terminal separator of a pneumatic power transport facility. It relates to a cyclone type sorting device.

[0002]

2. Description of the Related Art A cyclone-type dust collecting apparatus separates and collects dust contained in a fluid such as air by centrifugal force while swirling. Terminal separator, (2) Terminal separator in flash drying equipment for coal, etc., (3) Cyclone separator in closed-circuit crushing equipment for ore, raw materials, etc., (4) Emitted in the refined product manufacturing process in rice mills and mills It is used in fields such as dust collectors that collect dust and dirt.

A number of cyclone type dust collectors have been developed in which a vortex generating means is provided in a cyclone cylinder to enhance the dust collecting function by increasing the centrifugal force acting on the dust. For example, Japanese Unexamined Patent Application Publication No. 8-290078 (refer to FIG. 5) discloses a lower smoke stack 101 and a lower smoke stack 1.
01, a swirl flow generating cylinder 102 that is continuous with the upper end, an upper smoke flue 103 arranged above the swirl flow generating cylinder 102 via a predetermined space, and straddling at least the swirl flow generating cylinder 102 and the upper smoke flare line. A dust separation tube 105 surrounding each of them in a hermetically closed manner and having a dust discharge port 104 reduced in diameter at the bottom through an inclined surface, an exhaust pipe 107 communicating with the upper smoke discharge tube 103, and a dust separation tube 105. And a dust box 108 which is detachably attached to the dust discharge port 104, and the inclination angle of the inclined surface 109 of the dust separation cylinder 105 with respect to the horizontal plane is set to 50 degrees or more.

[0004] With the above configuration, swirling flow is given to the smoke exhaust rising in the lower smoke exhaust tube 101 by the swirling flow generating tube 102, and smoke containing heavy dust is discharged along the inner surface of the swirling flow generating tube 102. You will be turning. This smoke is sucked into the dust separation cylinder 105 through the annular space 110 by utilizing the negative pressure generated therein. Then, the dust such as the fire powder and the combustion debris in the flue gas that has lost the turning force is smoothly accumulated in the dust box 108 along the inclined surface 109 of the dust separating cylinder 105.

[0005]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 8-290 is disclosed.
The dust removing device disclosed in Japanese Patent No. 078 can greatly improve the efficiency of collecting dust in the dust box 108 by the swirling flow generating cylinder 102 and the dust separating cylinder 105. It is not suitable as a dust collecting device for collecting dust and refuse discharged in a refined product manufacturing process, or as a cyclone type sorting device applied as a terminal separator of a pneumatic power transport facility.

That is, the above-described conventional dust removing apparatus separates and collects dust while swirling it from a fluid such as air, but separates and removes only dust having a small specific gravity. On the other hand, in the milling process in rice mills and mills, fine foreign matter (hereinafter referred to as dust) having a low specific gravity, such as bran, dust, hulls and straws, and refined and immature grains come from the bran outlet of the milling equipment. Granules having a high specific gravity such as crushed granules may be discharged. If these high-purity refined products, immature grains, crushed granules, and the like are separately used as raw materials for flour, the yield of refined products should be improved.

[0007] However, in the conventional dust remover, due to the lack of wind power and other capabilities, refined products having a high specific gravity, immature grains,
Since it is not possible to sort out granules such as crushed granules, it is necessary to carry out disposal processing together with dust or to sort again by providing a sorting machine such as an aspirator at the subsequent stage of the dust removing device.

Further, when a conventional dust remover is used as a terminal separator of a pneumatic transportation facility for a granular material at a mill, it is not possible to separate the dust having a light specific gravity and the particulate matter having a heavy specific gravity.

In view of the above problems, the present invention can remove fine dust having a light specific gravity such as bran, dust, hulls, and straws, and can recover fine particles having a high specific gravity such as refined products, immature granules, and crushed granules. It is a technical object to provide a cyclone type sorting device.

[0010]

In order to solve the above-mentioned problems, the present invention provides a tapered cone portion, a large-diameter cylinder connected to the large-diameter side of the cone portion, and a large-diameter cylinder connected to the small-diameter side of the cone portion. A small-diameter cylinder forming an eddy current generator therein; a dust-containing air discharge cylinder concentrically fitted to the large-diameter cylinder facing the cone portion; and a dust-containing air discharge cylinder and the large-diameter cylinder. A separation chamber formed between the small-diameter cylinders and transferred to the large-diameter cylinder while imparting a swirling flow to the selected substances flowing from the small-diameter cylinder. A cyclone-type sorting apparatus for separating into a granular material and a granular material, wherein a peripheral portion of the large-diameter cylinder is provided with a granular material collection hole extending tangentially to a swirling flow, and the granular material collection hole is formed. A sorting unit that captures the particulate matter is connected to the A technical means of forming a slit-shaped dust-containing air intake hole in the opposite outer peripheral portion and communicating between the dust-containing air intake hole and the dust-containing air discharge tube by a conduit. Was taken.

[0011] Thus, when air mixed with particulate matter having a high specific gravity and dust having a low specific gravity flows into the cyclone type sorting apparatus of the present invention as a sorting object, a swirling flow is given by a vortex generator formed in a small diameter cylinder. When reaching the cone portion, a centrifugal force acts on the cone portion, and the material is transported along the inner surface of the cone portion in a direction in which the diameter gradually increases. Then, when the air mixed with the particulate matter and dust flows into the separation chamber of the large-diameter cylinder, the flow velocity of the swirling flow decreases as compared with the entrance of the cone portion. For this reason, particulates having a high specific gravity are separated and settled out of the dust-contaminated air by their own weight, and are collected in the particulates collection holes. It is taken into the hole and discharged from the dust-containing air discharge tube.

[0012] Further, the sorting section includes a cylindrical granular material introduction pipe connected to the granular material collection hole, a secondary air intake pipe for taking outside air into the granular material introduction pipe, and a secondary air intake pipe. With the secondary air control valve provided, even if dust falls into the particulate matter collection hole, the dust is sowed by the external air taken in from the secondary air intake pipe and merges again with the swirling flow of the separation chamber, It is possible to prevent dust from being taken into the particulate matter collection hole. At this time, it is effective if the intake amount of outside air is adjusted by the secondary air adjustment valve.

[0013] Further, if a flow rate control valve for controlling the flow rate of the dust-containing air is provided in a pipe line between the dust-containing air intake hole and the dust-containing air discharge pipe, the suction force is controlled by the flow rate control valve. However, it is possible to prevent the particulate matter from being taken into the dust-containing air discharge cylinder.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cyclone type sorting apparatus according to the present invention will be described below. FIG. 1 is a side view of a cyclone type sorting apparatus of the present invention, and FIG.
FIG. 3 is a vertical sectional view taken along line A ′, and FIG. 3 is a schematic perspective view of a cyclone type sorting apparatus of the present invention.

1 to 3, a cyclone type sorting apparatus 1 includes a tapered cone portion 2, a large diameter cylinder 3 connected to the large diameter side of the cone portion 2, and having a separation chamber inside. A small-diameter cylinder 5 connected to the small-diameter side of the cone portion 2 and having a vortex generator 4 formed therein; a dust-containing air suction pipe 6 connected to the outer periphery of the large-diameter cylinder 3; The large-diameter cylinder 3 is connected to the large-diameter cylinder 3 at a position facing the large-diameter cylinder 3, and further includes a dust-containing air discharge cylinder 7 fitted coaxially with the large-diameter cylinder 3.

The dust-containing air discharge cylinder 7 is fitted into the large-diameter cylinder 3 on the side opposite to the side where the cone section 2 is connected, and the end 7a protruding into the large-diameter cylinder 3 and the large-diameter cylinder 3 Is formed in the separation chamber 10. And the outer peripheral portion 9
A slit-shaped dust-containing air intake hole 11 (see FIGS. 2 and 3) is drilled in a part of the hole, and a key-shaped dust-containing air suction pipe 6 is provided in the dust-containing air intake hole 11. Connecting. The dust-containing air suction pipe 6 is provided with an air volume adjustment valve 12 so that the suction force can be adjusted. The other end of the dust-containing air suction pipe 6 is connected to the dust-containing air inlet 13 on the outer periphery of the dust-containing air discharge tube 7, and is sucked from the dust-containing air discharge tube 7.
The open end of the dust-containing air discharge tube 7 is formed at the dust-containing air discharge port 36.

On the other hand, a wide granular material collecting hole 14 is formed in a part of the outer peripheral portion 9 at a position facing the dust-containing air intake hole 11. The particulate matter collecting hole 14 is formed, for example, by extending a tangent line 9a on the side of the outer peripheral portion 9 on the air flow direction (see FIG. 1).
When the cross section is slightly inclined from the horizontal direction,
It becomes easier to collect particulate matter. Then, a sorting unit 8 for collecting a granular material having a high specific gravity, such as a refined product, immature granules, and crushed granules, is connected to the granular material collecting hole 14.

The sorting unit 8 includes a rectangular tubular particulate introduction pipe 15 connected to the particulate collection hole 14, a secondary air intake pipe 16 connected to the particulate introduction pipe 15 to take in outside air, and a secondary air intake pipe 16. And a secondary air control valve 17 provided in the secondary air intake pipe 16.

Next, the inside of the small-diameter cylinder 5 forming the vortex generator 4 is provided with a hollow tube 18 having a pointed air inflow side.
And six straightening plates 19 (see FIG. 1) are provided from the hollow tube 18 so as to be spirally inclined in the radial direction of the small-diameter cylinder 5 so that the inflow air is swirled. Reference numeral 20 denotes an air inlet for air mixed with particulate matter and dust.

FIG. 4 is a flow chart showing the milling process in a mill. This milling process includes a coarse separator 2 for removing impurities of reference numeral 21 and a coarser 2 for milling coarsely-selected raw materials.
2, rolling machines 23, 24 for crushing the milled raw materials,
25, a shifter 26 for sifting the ground flour, 2
7, 28. The cyclone type sorting apparatus 1 of the present invention is connected to the bran discharge port 29 of the grain mill 22 via a transport path 30. Then, the sorting machine 8 of the cyclone-type sorting machine 1 is provided with a roll machine 25 via a conveyance path 31.
And the granular material separated by the cyclone-type sorting device 1, for example, refined products, immature granules, and crushed granules can be charged. Further, a suction fan 33 is connected to the dust-containing air discharge cylinder 7 of the cyclone type sorting apparatus 1 through a pipe line 32, and a downstream of the suction fan 33 has a specific gravity of bran, dust, hull, straw and the like. A conventional cyclone 34 for separating light fine dust and clean air is connected. In addition,
Reference numeral 35 denotes a bag for accumulating bran, dust, hulls, straws, and the like.

Next, the operation of the above configuration will be described.

Now, from the bran discharge port 29 of the grain mill 22 of FIG. 4, fine particles having a low specific gravity such as bran, dust, hulls, straws and the like, as well as granular materials having a high specific gravity such as refined products, immature granules and crushed granules are discharged. Then, the suction force of the suction fan 33 acts and flows into the cyclone-type sorting apparatus 1 via the transport path 30.

When air containing particulate matter and dust flows into the cyclone type sorting device 1, a swirling flow is given by a vortex flow generating device 4 provided in the small diameter cylinder 5, and a centrifugal force acts when reaching the cone portion 2. And is transferred along the inner surface of the cone portion 2 in a direction in which the diameter gradually increases.
At this time, the flow velocity of the swirling flow decreases from the small diameter to the large diameter, so that the large-diameter cylinder 3 is suitably separated from the particulate matter and the air mixed with dust.

The air containing the particulate matter and dust is mixed with the large-diameter cylinder 3
Flow into the separation chamber 10 of the cone section 2
Granules such as refined products, immature granules, and crushed granules are separated and settled from the dust-contaminated air by their own weight and fall into the granule collection holes 14 due to their own weight. Then, these granular materials reach the granular material introduction pipe 15 from the granular material collection hole 14 and are collected there. At this time, dust may fall from the particulate matter collection hole 15. However, when the secondary air control valve 17 is opened so as to take in outside air from the secondary air intake pipe 16, the outside air flows into the particulate matter introduction pipe 15, The dust is sowed and merged into the swirling flow in the separation chamber 10 again. Accordingly, it is possible to prevent dust from being taken into the particulate matter collection hole 15.

The air mixed with dust such as bran, dust, outer skin and straws rises while rotating along the inner surface of the outer peripheral portion 9 in the separation chamber 10, and is finally taken into the dust-containing air intake hole 11. The dust-containing air intake hole 11 is connected to the dust-containing air discharge tube 7 via the dust-containing air suction tube 6, and the air containing dust is transferred to the dust-containing air discharge tube 7 by suction force due to negative pressure. You. At this time, if the suction force is adjusted by the air volume adjusting valve 12, it is possible to prevent the particulate matter mixed in the swirling flow from being taken into the dust-containing air discharge cylinder 7.

Air containing a small amount of dust is discharged from the dust-containing air discharge cylinder 7, but is swirled in the separation chamber 10 in order to appropriately separate the particulate matter and the air mixed with dust. It is. And the dust-containing air intake hole 1
The dust-containing air taken in from 1 and the dust-containing air discharged from the dust-containing air discharge tube 7 are merged, and the dust-containing air discharge port 36 is formed.
From the cyclone 3 via a pipe 32 and a suction fan 33
4 and separated by the cyclone 34 into clean air and dust such as bran, dust, hulls and straws.

The fine products, immature granules, crushed granules, etc., having a high specific gravity, accumulated in the granular material introduction pipe 15 of the sorting section 8
By opening an air lock (not shown) provided on the roll 1, the roll can be put into the roll machine 25. At this time, fine particles having a light specific gravity are removed from the foreign matter discharged from the grain mill 22, and fine particles having a high specific gravity, such as refined products, immature granules, and crushed granules, are separated out and re-used as a raw material of flour, for example. Since it is used, the yield of refined products can be improved.

[0028]

As described above, according to the present invention, at the outer peripheral portion of the large-diameter cylinder, a granular material collecting hole that extends the flow of the swirling flow in the tangential direction is formed. A sorting unit for capturing the particulate matter is connected, and further, a slit-shaped dust-containing air intake hole is formed in an outer peripheral portion facing the particulate matter collection hole, and the dust-containing air intake hole and the dust-containing air intake hole are connected to each other. Because the pipes communicated with the dust-containing air discharge pipe via a conduit, the heavy particles with a high specific gravity separated and settled out of the air containing the dust by their own weight, and were collected in the particle collection holes. It is taken into the dust-containing air intake hole together with the air by the force and discharged from the dust-containing air discharge cylinder.If it is used as a dust collector in a rice mill or a mill, it can separate the heavy particles having a high specific gravity and separate them into flour. It can be reused as a raw material.

Further, the sorting section is provided with a cylindrical granular material introduction tube connected to the granular material collecting hole, a secondary air intake tube for taking in outside air into the granular material introduction tube, and the secondary air intake tube. Since it is composed of a secondary air control valve, even if the dust falls into the particulate matter collection hole, the dust is sowed by the outside air taken in from the secondary air intake pipe and joins again to the swirling flow in the separation chamber, It is possible to prevent dust from being taken into the particulate matter collection hole.

Further, when an air flow control valve for adjusting the air flow of the dust-containing air is provided in a pipeline between the dust-containing air intake hole and the dust-containing air discharge cylinder, the suction force is adjusted by the air flow control valve,
It is possible to prevent the particulate matter from being taken into the dust-containing air discharge cylinder.

[Brief description of the drawings]

FIG. 1 is a side view of a cyclone type sorting apparatus of the present invention.

FIG. 2 is a longitudinal sectional view taken along line A-A 'of FIG.

FIG. 3 is a schematic perspective view of a cyclone type sorting apparatus of the present invention.

FIG. 4 is a flowchart showing a milling process in a flour mill.

FIG. 5 is a longitudinal sectional view showing a conventional cyclone type dust collector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cyclone type sorting apparatus 2 Cone part 3 Large diameter cylinder 4 Eddy current generator 5 Small diameter cylinder 6 Dust-containing air suction pipe 7 Dust-containing air discharge cylinder 8 Sorting part 9 Outer part 10 Separation chamber 11 Dust-containing air intake hole 12 Air volume control Valve 13 Dust-containing air inflow port 14 Granular material collection hole 15 Granular material introduction pipe 16 Secondary air intake officer 17 Secondary air intake valve 18 Hollow tube 19 Rectifier plate 20 Air intake 21 Rough separator 22 Grain machine 23 roll machine 24 roll machine 25 roll machine 26 shifter 27 shifter 28 shifter 29 bran discharge port 30 transfer path 31 transfer path 32 pipeline 33 suction fan 34 cyclone 35 bag 36 dust-containing air discharge port

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Koji Kanagawa 2-30, Saijo-Nishihoncho, Higashihiroshima-shi, Hiroshima F-term in Satake Works (reference) 4D021 FA25 GA08 HA02 4D053 AA03 AB01 BA01 BB02 BC03 BD02 CA22 CC01 CC14 CD12 CD25

Claims (3)

[Claims] 1. A tapered cone portion, a large-diameter cylinder connected to the large-diameter side of the cone portion, a small-diameter cylinder forming a vortex generator inside the small-diameter side of the cone portion, and the cone. A dust-containing air discharge cylinder concentrically fitted to the large-diameter cylinder facing the portion, and a separation chamber formed between the dust-containing air discharge cylinder and the large-diameter cylinder. A cyclone-type sorting apparatus which transfers the sorted material into the large-diameter cylinder while imparting a swirling flow to the sorted material, and separates the sorted material into dust-containing air and particulate matter in a separation chamber of the large-diameter cylinder, In the outer peripheral portion of the large-diameter cylinder, while drilling a particulate recovery hole tangentially extending the flow of the swirling flow, connected to a sorting unit that captures the particulate in the particulate recovery hole, further, A slit-shaped dust-containing air intake hole is provided on the outer peripheral portion facing the particulate matter collection hole. A cyclone-type sorting apparatus, wherein the dust-containing air intake hole and the dust-containing air discharge cylinder are connected by a pipe while being drilled. 2. The method according to claim 1, wherein the sorting unit includes a cylindrical granular material introduction tube connected to the granular material collection hole, a secondary air intake tube for taking outside air into the granular material introduction tube, and a secondary air intake tube. The cyclone type sorting apparatus according to claim 1, further comprising a secondary air control valve provided. 3. The air flow control valve according to claim 1, wherein an air flow control valve for adjusting a suction amount of the dust-containing air is provided in a pipe line between the dust-containing air intake hole and the dust-containing air discharge tube. Cyclone type sorting device.