JP2008023449A - Foreign matter removal apparatus and foreign matter removing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently recover aggregate of preferable quality by efficiently and surely removing foreign matter like wood, paper, cloth or plastic contained in the aggregate. <P>SOLUTION: This foreign matter removal apparatus is equipped with a rotary cylinder rotating while taking in aggregate in its inside , a drive means rotating the rotary cylinder, and a water supply means supplying water to the rotary cylinder. The rotary cylinder has an aggregate supply port at one end part in the rotary shaft direction and an aggregate discharge port at the other end part. The supply port has a drawn part inwardly drawn to be a reduced diameter. The peripheral face is formed into a non-opened part having no hole from one end part to the middle part, and an opened part from the middle part to the other end part having a lot of holes. The bottom part is upwardly tilted from the one end toward the other end part. Spiral feeding blades are provided on the inner peripheral face leading aggregate upward by the rotation of the blades. The water supply means is equipped with a first water supply means spraying water toward the non-opened part in the rotary cylinder, and a second water supply means spraying water toward the opened part outside the rotary cylinder. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a contaminant removal apparatus and a contaminant removal system, and more particularly to an apparatus and system that can efficiently and reliably remove contaminants such as wood, paper, cloth, and plastic contained in aggregate. .

Conventionally, an apparatus that separates and recovers components contained in a raw material by taking the raw material and water into a cylindrical drum having a large number of holes on the peripheral surface and rotating the drum is known. Patent Documents 1 to 3 are examples thereof.
However, the conventional apparatuses disclosed in Patent Documents 1 to 3 are suitable as an apparatus for classifying aggregates, but in order to remove impurities such as wood and plastic contained in the aggregates. It is not suitable as a device.

The reason for this is that in the devices disclosed in Patent Documents 1 to 3, water in the drum remains in a pooled state and hardly moves. Therefore, contaminants such as wood and plastic incorporated together with the aggregate are not contained in the drum. It stays and is not easily discharged outside.
Therefore, as the process progresses, a large amount of contaminants accumulates in the drum, causing clogging of holes, or being discharged by being mixed into the aggregate. There was a risk of quality degradation.

  As described above, the devices disclosed in Patent Documents 1 to 3 may be excellent as an aggregate classifying device, but remove impurities such as wood and plastic contained in the aggregate. It was difficult.

Japanese Examined Patent Publication No. 53-41822 Japanese Patent No. 2521619 Japanese Patent No. 36622356

  The present invention has been made to solve the above-described problems of the prior art, and efficiently removes floating and sinking impurities such as wood, paper, cloth, and plastic contained in the aggregate. The present invention relates to a contaminant removal apparatus and a contaminant removal system that can be reliably removed and can efficiently collect high-quality aggregates.

  The invention according to claim 1 is an apparatus for removing impurities contained in the aggregate, the rotary cylinder taking in the aggregate inside and rotating around the axis, and for rotating the rotary cylinder Drive means and water supply means for supplying water into the rotary cylinder, the rotary cylinder having a supply port for taking in the aggregate at one end in the direction of the rotation axis and at the other end. It has a discharge port for discharging the aggregate, the supply port has a narrowed portion that is narrowed inward and has a small diameter, and the peripheral surface is a non-opening portion that has no hole from one end to the middle And from the midway part to the other end part, it is an opening part having a large number of holes, the bottom part is arranged so as to incline upward from the one end part toward the other end part, and taken into the inner peripheral surface inside A spiral feed blade that guides the aggregate formed upward with rotation, and the water supply means includes: First water supply means for injecting water toward the inner peripheral surface of the non-opening inside the rotary cylinder, and second water supply means for injecting water toward the outer peripheral surface of the opening outside the rotary cylinder The present invention relates to a foreign matter removing apparatus.

  A second aspect of the present invention relates to the foreign matter removing apparatus according to the first aspect, further comprising a cylinder for changing an inclination angle of the rotating cylinder.

  The invention according to claim 3 relates to the contaminant removal apparatus according to claim 1 or 2, wherein the driving means is an inverter motor.

  According to a fourth aspect of the present invention, there is provided the contaminant removing apparatus according to any one of the first to third aspects, wherein the rotating cylinder is a truncated cone-shaped cylinder.

  The invention according to claim 5 includes the foreign matter removing device according to any one of the first to fourth aspects, and a tank that receives water and foreign matter discharged from the inside of the rotating cylinder of the foreign matter removing device, The tank includes a screw conveyor for sending received foreign substances to the outside and a circulation pump for supplying water contained in the tank to the water supply means. .

  The invention according to claim 6 includes a drum classifier that takes in the drainage discharged from the tank, and the drum classifier includes a rotating cylinder that rotates around a horizontal axis by taking the drainage into the interior, Driving means for rotating the rotating cylinder, and the rotating cylinder has a supply port for taking in the drainage at one end in the direction of the rotation axis, and a thin bone contained in the drainage at the other end. A discharge port for discharging the material, and the supply port is formed to have a larger diameter than the discharge port, and the inner peripheral surface has one end portion as the fine aggregate contained in the drained water taken into the interior rotates. 6. The contaminant removal system according to claim 5, wherein a spiral feed blade is provided to lead from one end to the other end.

  The invention according to claim 7 is a hopper for charging a raw material made of aggregate containing foreign substances, and a vibrating sieve for sieving the foreign substances and aggregates in the raw material discharged from the outlet of the hopper. A first conveyor that conveys impurities removed from the raw material by the upper sieve of the vibrating sieve, and a second conveyor that conveys aggregate removed from the raw material by the lower sieve, The contaminant removal system according to claim 5 or 6, wherein the aggregate is supplied to a supply port of the rotary cylinder.

  According to an eighth aspect of the present invention, there is provided a storage tank for storing the fine aggregate in the raw material that has passed through the lower screen in the lower part of the vibrating screen, and water in the rotating cylinder of the drum classifier into the storage tank. And a third water supply means for supplying water and a fourth water supply means for returning the water in the storage tank to the rotary cylinder of the drum classifier. The present invention relates to an object removal system.

According to the first aspect of the present invention, among the raw materials taken into the rotating cylinder, the aggregate having a large specific gravity and not floating on the water is led to the other end of the rotating cylinder by the spiral feed blade and is discharged. The buoyant contaminants are floated on the water supplied by the water supply means, and the submerged contaminants are rolled up by rotation and continuously with water from one end (supply port) of the rotating cylinder. Can be discharged. Therefore, foreign materials such as wood, paper, cloth, and plastic contained in the aggregate can be efficiently and reliably removed, and high-quality aggregate can be efficiently recovered.
More specifically, the lower part (from one end part to the middle part) of the peripheral surface of the inclined rotating cylinder is a non-opening part, the upper part (from the middle part to the other end part) is the opening part, and the supply port is inside. By having a narrowed portion that has been squeezed to a smaller diameter, the supernatant water can be discharged from one end (supply port) while always storing a certain amount of water in the non-opening portion below the rotating cylinder. It is possible to float the water-flooding contaminants in the water, and wind up the water-spilling contaminants by the water flow by rotation, and separate them separately from the aggregate and continuously discharge them. Moreover, since the aggregate taken out from the discharge port is drained by the opening when passing through the upper part (from the midway part to the other end part) of the rotating cylinder, the amount of water contained in the recovered aggregate is reduced. be able to. Furthermore, first water supply means for injecting water toward the inner peripheral surface of the non-opening portion inside the rotating cylinder, and second water supply means for injecting water toward the outer peripheral surface of the opening section outside the rotating cylinder. Therefore, the contaminants mixed in the aggregate taken into the rotating cylinder can be reliably separated and discharged together with the water, and the contaminants clogged in the opening hole can be removed. Since it can be removed by force and discharged from the hole, the removal efficiency of impurities can be further enhanced. The aggregate can also be washed with water.

  According to the invention according to claim 2, by providing the cylinder for changing the inclination angle of the rotating cylinder, the rotating cylinder can be inclined at an optimum angle according to the amount and type of impurities, It becomes possible to increase the removal efficiency of impurities.

  According to the invention which concerns on Claim 3, when a drive means consists of an inverter motor, the rotational speed of a rotary cylinder can be adjusted according to the kind and quantity of a foreign material, and it can improve the removal efficiency of a foreign material. It becomes possible.

  According to the invention which concerns on Claim 4, when a rotation cylinder consists of a truncated cone-shaped cylinder, the height of a rotation cylinder can be made low and it becomes possible to install in space saving.

  According to the fifth aspect of the present invention, the water and contaminants discharged from the inside of the rotating cylinder of the contaminant removal device are received by the tank, and the contaminants are separated from the water in the tank and discharged to the outside. It becomes possible to supply the water from which the substances have been removed to the water supply means and reuse it.

  According to the invention which concerns on Claim 6, the waste_water | drain discharged | emitted from a tank is received in a drum classifier, The fine aggregate (sand) contained in water is isolate | separated in this drum classifier, and it can take out and collect | recover. it can.

  According to the seventh aspect of the present invention, a relatively large contaminant contained in the aggregate supplied into the rotating cylinder of the contaminant removal device can be separated and removed in advance by the vibration sieve, so that the contamination in the subsequent process The burden on the object removing device can be reduced, and the amount of contaminants contained in the collected aggregate can be greatly reduced.

  According to the invention according to claim 8, the storage tank below the vibration sieve is washed with water, and the fine aggregate (sand) in the raw material that has passed through the vibration sieve is moved from the storage tank to the drum classifier. It can be separated and collected from water in a drum classifier.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a foreign matter removing apparatus and a foreign matter removing system according to the present invention will be described with reference to the drawings.
FIG. 1 to FIG. 4 are views showing a contaminant removing device according to the present invention, FIG. 1 is a front view, FIG. 2 is a longitudinal sectional view of a rotating cylinder (described later) of the contaminant removing device, and FIG. FIG. In FIG. 3, a cylinder (described later) is omitted.

  A foreign matter removing device (1) according to the present invention is a device for removing foreign matters (wood, paper, cloth, plastic, etc.) contained in an aggregate, and the aggregate is taken into the inside of the shaft. The rotating cylinder (2), a driving means for rotating the rotating cylinder (2), and a water supply means for supplying water into the rotating cylinder (2).

  The rotary cylinder (2) is cylindrical in the illustrated example, and has a supply port (3) for taking in the aggregate at one end in the direction of the rotation axis, and a discharge port (4) for discharging the aggregate at the other end. have. One end portion of the rotary cylinder (2), that is, the supply port (3) is formed with a narrowed portion (3a) that is narrowed inward (in the direction of the rotation axis) to have a small diameter, and a certain amount of water is tilted. Can be stored on the supply port (3) side of the rotating cylinder (2).

The peripheral surface of the rotating cylinder (2) is a non-opening portion (2a) having no holes from one end portion to the middle portion, and a large number of diameters smaller than the diameter of the aggregate to be recovered from the middle portion to the other end portion. An opening (2b) having a hole. The opening (2b) is formed of punching metal or the like.
The length ratio between the non-opening (2a) and the opening (2b) can be arbitrarily set within a range of 2: 1 to 1: 2, for example.

The rotating cylinder (2) is fixed on the frame (5), and the frame (5) is mounted on the gantry (6) so that the bottom of the rotating cylinder (2) is inclined upward from one end to the other end. It is fixed to.
On the other end side of the rotating cylinder (2), a cylinder (7) such as a hydraulic cylinder or an electric cylinder is interposed between the frame (5) and the gantry (6). The tilt angle of the rotating cylinder (2) can be arbitrarily set by the operation.

A spiral feed blade (8) is provided on the inner peripheral surface of the rotating cylinder (2).
The feed blade (8) plays a role of guiding the aggregate taken inside as the rotary cylinder (2) rotates upward (to the discharge port (4) side).

  The driving means for rotating the rotating cylinder (2) includes a motor (9) installed on the frame (5), a sprocket (10) attached along the outer periphery of the rotating cylinder (2), and a motor ( 9) The chain (11) spanned between the rotary shaft and the sprocket (10), and the frame (5) installed on the frame (5) while contacting the outer peripheral surface as the rotary cylinder (2) rotates. It comprises a rotating support roller (12).

As the motor (9), an inverter motor is preferably used.
By using the inverter motor, it is possible to adjust the rotation speed of the rotating cylinder according to the type and amount of foreign matter, and it is possible to increase the removal efficiency of foreign matter.

  The water supply means includes a first water supply means (13) for injecting water toward the inner peripheral surface of the non-opening portion (2a) inside the rotating cylinder (2), and an opening portion outside the rotating cylinder (2). And a second water supply means (14) for injecting water toward the outer peripheral surface of (2b).

The first water supply means (13) is a pipe that guides water pumped up by a circulation pump (24d) disposed in a tank (24), which will be described later, to a non-opening (2a) inside the rotary cylinder (2). (13a) and an injection nozzle (13b) for injecting water guided by the pipe (13a) toward the inner peripheral surface of the non-opening (2a). A plurality of the injection nozzles (13b) are arranged at intervals along the axial direction of the rotating cylinder (2), and water can be sprayed evenly on the lower part of the inner peripheral surface of the non-opening part (2a). It is like that.
The pipe (13a) is fixed to the frame (5) by a universal joint (15), whereby the angle of the pipe (13a) can be freely changed, and water injected from the injection nozzle (12a) can be discharged. The hit position can be easily adjusted to the optimum position.

  The second water supply means (14) includes a pipe (14a) for guiding water pumped from a tank (24), which will be described later, to the opening (2b) outside the rotating cylinder (2), and the pipe (14a). And an injection nozzle (14b) that injects water directed toward the outer peripheral surface of the opening (2b). A plurality of spray nozzles (14b) are arranged at intervals along the axial direction of the rotating cylinder (2), and water can be sprayed evenly from above on the outer peripheral surface of the opening (2b). ing.

  In FIG. 2, the member indicated by reference numeral (16) on the supply port (3) side is for supplying the aggregate conveyed by the second conveyor (23) described later into the rotary cylinder (2). It is an input chute.

In the contaminant removal apparatus according to the present invention, the shape of the rotating cylinder (2) may be a truncated cone shape as shown in FIG. The example shown in FIG. 4 has the same configuration except that the outer shape of the rotating cylinder (2) is different from that shown in FIGS.
When using a truncated cone shape, as shown in the figure, the supply port (3) side at one end is the large-diameter portion, the discharge port (4) side at the other end is the small-diameter portion, and the rotation axis is horizontal. To do.
Thus, when the rotating cylinder (2) is in the shape of a truncated cone, the height of the other end can be suppressed lower than in the case of a cylindrical shape, and thus the installation space can be reduced.

FIG. 5 is a flowchart showing the overall configuration of the contaminant removal system according to the present invention.
The foreign matter removal system according to the present invention includes a hopper (20) into which a raw material made of aggregate containing foreign matter is charged, and the foreign matter and aggregate in the raw material discharged from the outlet of the hopper (20). Vibrating sieve (21) for sieving, first conveyor (22) for conveying impurities removed from raw material by upper sieve of vibrating sieve (21), and removing from raw material by lower sieve of vibrating sieve (21) The second conveyor (23) for transporting the aggregate to the contaminant removing device (1), the contaminant removing device (1) provided with the above-described configuration (see FIGS. 1 to 4), and the contaminant removing device The tank (24) which receives the water discharged | emitted from the inside of the rotating cylinder of (1) and a foreign material, and the drum classifier (25) which takes in the waste_water | drain discharged | emitted from a tank (24) are provided.

The vibrating sieve (21) is disposed below the discharge port of the hopper (20) and includes a coarse upper sieve and a fine lower sieve. The upper screen captures the foreign material larger than the aggregate and passes the aggregate, and the lower screen captures the aggregate (coarse aggregate) having a larger particle size out of the aggregate that has passed through the upper screen. A small aggregate (fine aggregate) is passed through.
A storage tank (26) for storing fine aggregate (sand) that has passed through the lower screen is disposed below the vibration screen (21). The bottom surface of the storage tank (26) is an inclined surface inclined from one end side toward the other end side.

The first conveyor (22) conveys the foreign matter captured by the upper sieve of the vibrating sieve (21) to the foreign matter yard.
The second conveyor (23) conveys the coarse aggregate captured by the lower sieve of the vibrating sieve (21) and passes through the charging chute (16) to the supply port (3) of the contaminant removal device (1). Supply.

Below the rotating cylinder (2) of the foreign substance removing device (1), there is a space along the length direction (rotating axis direction) of the rotating cylinder (2) and between the bottom surface of the rotating cylinder (2). Thus, a semi-cylindrical receiving member (27) is provided. (Note that FIG. 5 is represented by a single line for a schematic sectional view)
The receiving member (27) receives water and impurities discharged from the opening (2b) and the supply port (3) of the rotating cylinder (2) and guides them to the tank (24).

6 to 8 are views showing the tank (24). FIG. 6 is a front view, FIG. 7 is a plan view, and FIG. 8 is a left side sectional view.
The tank (24) has a supply port (24a) for receiving water and contaminants guided by the receiving member (27), and a contaminant floating in the received water disposed at the bottom of the supply port (24a). A screw conveyor (24b) for feeding to the outside, and a tank body (24c) disposed below the screw conveyor (24b) and containing water received from the supply port (24a) are provided.

Further, as shown in FIG. 5 (omitted in FIGS. 6 to 8), in the tank body (24c), the circulation pump (24d) is disposed on the upper side, and the drainage pump (24e) is disposed on the lower side. Has been.
The circulation pump (24d) supplies water above the tank body (24c) to the first water supply means (13) and the second water supply means (14) described above. The drainage pump (24e) supplies water below the tank body (24c) to a drum classifier (25) described later.

The drum classifier (25) takes in the waste water discharged from the tank (24) and rotates the cylindrical cylinder (25a) rotating around a horizontal axis, and the rotating cylinder (25a). Drive means (not shown).
The rotary cylinder (25a) has a supply port (25b) for taking in the drainage at one end in the direction of the rotation axis, and a discharge port (25c) for discharging the fine aggregate contained in the drainage at the other end. is doing. These supply ports (25b) and discharge ports (25c), that is, both ends of the rotating cylinder have a smaller diameter, but the supply port (25b) has a larger diameter than the discharge port (25c).
Accordingly, in combination with the fact that there is no hole in the peripheral surface of the rotating cylinder (25a), a certain amount of water is stored inside the rotating cylinder (25a) as shown in the figure, and the overflowed water is supplied to the supply port (25b). ).

A spiral feed blade (25d) is provided on the inner peripheral surface of the rotating cylinder (25a), and the fine aggregate contained in the drained water taken inside is accompanied by the rotation of the rotating cylinder (25a). It is guided from one end to the other end and discharged from the discharge port (25c).
A third conveyor (26) is disposed below the discharge port (25c), and the fine aggregate (sand) discharged from the discharge port (25c) is conveyed to the sand yard.

A drainage receiving tank (27) is disposed below the supply port (25b), and water discharged after overflowing from the supply port (25b) is accommodated in the drainage receiving tank (27).
A pump (28) is disposed in the drainage receiving tank (27) and supplies water in the drainage receiving tank (27) to the thickener.

  A pump (29) is disposed in the rotating cylinder (25a) of the drum classifier. This pump (29), together with the pipe (30), is a third for supplying the water in the rotating cylinder (25a) into the storage tank (26) disposed at the lower part of the vibrating sieve (21). It constitutes water supply means.

  In addition, a pipe (31) is connected to the vicinity of the bottom face on the other end side of the storage tank (26) at the lower part of the vibration sieve (21). The pipe (31) extends to the inside of the rotating cylinder (25a) of the drum classifier, and a fourth water supply means for returning the water in the storage tank (26) into the rotating cylinder (25a) of the drum classifier. Is configured.

Hereinafter, the operation of the contaminant removal system according to the present invention having the above-described configuration will be described.
First, a raw material made of aggregate containing impurities is supplied to the hopper (20).
The raw material supplied into the hopper (20) falls from the discharge port at the lower end of the hopper to the vibrating sieve (21).
In the vibrating sieve (21), large impurities contained in the raw material are captured in the upper sieve, and the aggregate passes through the sieve mesh and falls to the lower sieve. The foreign matter captured by the upper sieve is discharged to the first conveyor (22), and is conveyed to the foreign matter yard by the first conveyor (22).
As for the aggregate that has passed through the upper screen, coarse aggregate having a large particle size is captured by the lower screen, and the fine aggregate (sand) having a small particle size passes through the screen and falls downward. The coarse aggregate captured by the lower sieve is discharged to the second conveyor (23), conveyed by the second conveyor (23), and rotated by the contaminant removal device (1) through the charging chute (16). It is supplied to the supply port (3) of the cylinder (2).
The fine aggregate that has passed through the lower sieve is stored in the storage tank (26).

In the rotating cylinder (2) of the contaminant removal device (1), a certain amount of water supplied by the first water supply means (13) and the second water supply means (14) is accumulated in the non-opening portion (2a). The aggregate supplied from the supply port (3) is supplied to the accumulated water.
Then, the water-flooding contaminants mixed in the aggregate float on the water, and are discharged to the outside of the rotating cylinder (2) on the supernatant water flowing down from the supply port (3) due to the inclination. Moreover, even if it is a submerged foreign substance, since specific gravity is lighter than an aggregate normally, it is wound up with the water flow which arises with rotation of a rotation pipe | tube (2), and is rotated with a water supply port (3) and a rotation pipe | tube (2). It is discharged outside.
On the other hand, the aggregate having a larger specific gravity than the contaminants does not float on the water and is not wound up by the water flow, so that it is not discharged from the supply port (3), but spirals as the rotating cylinder (2) rotates. Is guided upward along the feed blade (8) and discharged from the discharge port (4) to the outside. At this time, since the opening (2b) is formed in the upper part (from the midway part to the other end part) of the rotating cylinder (2), the aggregate is drained and then taken out from the discharge port (4). Further, since the fine aggregate having a small particle size also flows down with the water through the opening (2b), the aggregate discharged from the discharge port (4) is only a coarse aggregate having a large particle size.

The first water supply means (13) for injecting water toward the inner peripheral surface of the non-opening portion (2a) inside the rotating cylinder (2) reliably removes impurities from the aggregate taken into the rotating cylinder. The second water supply means (14) that plays the role of separating and cleaning the aggregate and sprays water toward the outer peripheral surface of the opening (2b) outside the rotating cylinder (2) is provided with the opening (2b ) To prevent the foreign matter accumulated in the rotating cylinder from being discharged from the discharge port (4).
By the synergistic action of these two water supply means, it becomes possible to dramatically improve the removal efficiency of impurities mixed in the aggregate.

  Coarse aggregate discharged from the discharge port (4) of the rotating cylinder (2) is accumulated in the aggregate yard and from the water and supply port (3) passing through the hole in the opening (2b) of the rotating cylinder (2). The overflowed water is received by the receiving member (27) and supplied to the tank (24).

  In the tank (24), floating water contaminants contained in the supplied water are removed by the upper screw conveyor (24b), and the water after the contaminants are removed is accommodated in the lower tank body (24c). The

  Of the water stored in the tank body (24c), the upper water is supplied to the first water supply means (13) and the second water supply means (14) by the circulation pump (24d), and the lower water is drained. It is supplied to the drum classifier (25) by the pump (24e).

The fine aggregate contained in the water taken into the drum classifier (25) is guided from one end to the other end along with the rotation of the rotating cylinder (25a) and discharged from the discharge port (25c). It is conveyed to the sand yard by the third conveyor (26).
The water overflowed from the rotary cylinder (25a) is discharged from the supply port (25b), accommodated in the drain receiving tank (27), and sent to the thickener by the pump (28).

The water accumulated in the rotating cylinder (25a) of the drum classifier is pumped up by the pump (29), passes through the pipe (30), and is placed in the lower part of the vibrating sieve (21). Supplied to.
The pipe (30) is connected to the upper side of the inclined surface of the storage tank (26), and the water supplied from the pipe (30) produces fine aggregate accumulated in the storage tank (26) along the inclination. The water is made to flow down the inclined surface.
The water containing the fine aggregate flowing down the inclined surface of the storage tank (26) passes through the pipe (32) connected to the lower side of the inclined surface of the storage tank (26), and the rotating cylinder of the drum classifier ( 25a) and is discharged from the discharge port (25c) by the above-described action.

  By going through the series of steps described above, impurities contained in the raw material are surely removed, and high-quality coarse aggregates and fine aggregates with less impurities can be efficiently recovered.

Hereinafter, the effects of the present invention will be made clearer by showing examples of the contaminant removal apparatus according to the present invention. However, the present invention is not limited to the following examples.
(Example)
The contaminant removal process was performed using the contaminant removal apparatus having the structure shown in FIGS. The total amount of water supplied from the first water supply means and the second water supply means is 600 L / min, the rotational speed of the rotating cylinder (inverter control) is 5 to 10 rpm, and the raw material from the supply port (aggregates including impurities) The supply amount of was set to 1 to ³ m ³ / hr.
As a result of measuring the amount of contaminants contained in the aggregate collected from the discharge port of the contaminant removal device, it was confirmed that approximately 99% of the contaminants contained in the raw material had been removed. And about 75% of the supplied raw materials could be recovered as reusable recycled aggregates.

  The present invention is used as an apparatus and system for removing foreign substances such as wood, paper, cloth, and plastic contained in aggregates.

It is a front view of the contaminant removal apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the rotation cylinder of the contaminant removal apparatus which concerns on this invention. It is a right view of the contaminant removal apparatus which concerns on this invention. It is a front view of the example of a change of the contaminant removal apparatus which concerns on this invention. It is a flowchart which shows the whole structure of the contaminant removal system which concerns on this invention. It is a front view which shows the tank of the contaminant removal system which concerns on this invention. It is a top view which shows the tank of the contaminant removal system which concerns on this invention. It is left side sectional drawing which shows the tank of the contaminant removal system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contaminant removal apparatus 2 Rotating cylinder 2a Non-opening part 2b Opening part 3 Supply port 3a Restriction part 4 Discharge port 7 Cylinder 8 Feeding blade 9 Motor 13 First water supply means 14 Second water supply means 20 Hopper 21 Vibrating sieve 22 First One conveyor 23 Second conveyor 24 Tank 25 Drum classifier 25a Rotating cylinder 25b Supply port 25c Discharge port 25d Feed blade

Claims (8)

An apparatus for removing impurities contained in aggregate,
A rotating cylinder that takes the aggregate inside and rotates around the axis; a driving means for rotating the rotating cylinder; and a water supply means for supplying water into the rotating cylinder,
The rotary cylinder has a supply port for taking in the aggregate at one end in the direction of the rotation axis, and a discharge port for discharging the aggregate at the other end, and the supply port is narrowed inward to have a small diameter. The peripheral surface is a non-opening portion having no holes from one end portion to the middle portion, and an opening portion having a plurality of holes from the middle portion to the other end portion, and the bottom portion is the above-described opening portion. It is arranged so as to incline upward from one end part toward the other end part, and a spiral feed blade is provided on the inner peripheral surface to guide the aggregate incorporated into the upper part as it rotates. ,
The water supply means is a first water supply means for injecting water toward the inner peripheral surface of the non-opening inside the rotating cylinder, and injects water toward the outer peripheral surface of the opening outside the rotating cylinder. And a second water supply means.   The foreign matter removing apparatus according to claim 1, further comprising a cylinder for changing an inclination angle of the rotating cylinder.   3. The foreign matter removing apparatus according to claim 1, wherein the driving means is an inverter motor.   The contaminant removal apparatus according to any one of claims 1 to 3, wherein the rotating cylinder is formed of a truncated cone. The contaminant removal apparatus according to any one of claims 1 to 4,
A tank for receiving water and contaminants discharged from the inside of the rotating cylinder of the contaminant removal apparatus;
The tank includes a screw conveyor for sending received impurities to the outside, and a circulation pump for supplying water contained in the tank to the water supply means. . It is equipped with a drum classifier that takes in the waste water discharged from the tank,
The drum classifier includes a rotating cylinder that takes in the waste water and rotates around a horizontal axis, and a driving means for rotating the rotating cylinder,
The rotating cylinder has a supply port for taking in the drainage at one end in the direction of the rotation axis, and has a discharge port for discharging the fine aggregate contained in the drainage at the other end. It is formed with a diameter larger than the outlet, and the inner circumferential surface is provided with a spiral feed blade that guides the fine aggregate contained in the drained water taken inside from one end to the other end with rotation The contaminant removal system according to claim 5, wherein: A hopper for feeding raw materials made of aggregates containing impurities,
A vibrating sieve that sifts out impurities and aggregates in the raw material discharged from the outlet of the hopper;
A first conveyor that conveys impurities removed from the raw material by the upper sieve of the vibrating sieve, and a second conveyor that conveys aggregate removed from the raw material by the lower sieve,
The said 2nd conveyor supplies the said aggregate to the supply port of the said rotation cylinder, The contaminant removal system of Claim 5 or 6 characterized by the above-mentioned. A storage tank for storing the fine aggregate in the raw material that has passed through the lower screen at the lower part of the vibrating screen;
A third water supply means for supplying water in the rotating cylinder of the drum classifier into the storage tank;
The contaminant removal system according to claim 7, further comprising a fourth water supply unit that returns water in the storage tank to a rotating cylinder of the drum classifier.

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