JPH10250821A - Mist type belt cleaner equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the fall quantity of conveyed material such as ore to an extreme degree by providing a built-in gas-water mixed fluid spraying device which is a nozzle with a slit for spraying a gas-water mixed fluid in an upper position in a cross direction to a conveyor belt. SOLUTION: Attachment still sticking to the face of a conveyor belt 1 roughly cleaned by a rough eliminating cleaner 5 is softened to the extent of containing water with mist sprayed from a gas-water mixed fluid spraying device 9. The softened attachment is completely eliminated from the conveyor belt 1 by providing a plurality of belt scrapers 12, 13 fitted to the front and rear, desirably the rear, of a plurality of gas-water mixed fluid spraying devices 9 so as to be slidable in the vertical direction of conveyor belt cross section. The attachment eliminated from the conveyor belt 1 by the belt scrapers 12, 13 and waste water generated at the gas-water mixed fluid spraying devices 9 are collected into a shoot 2-2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device for transporting bulk materials such as iron ore, coal, and auxiliary materials, and more particularly to a mist having a built-in function for effectively removing conveyed materials adhering to a conveyor belt conveying surface. The present invention relates to a belt cleaner system.

[0002]

2. Description of the Related Art
Usually, it is widely used in various technical fields because it can easily transport a wide range of objects to be transported, from powders and granules to relatively large solids. Conventionally, various types of belt conveyor devices have been proposed, but if all the devices are classified by function, they can be roughly classified into a dry type and a wet type. Most of these belt conveyor devices are provided with an adhering matter removing device so that the conveyed material adhering to the belt does not fall outside on the belt return side, particularly on the head pulley outlet side and the return roller portion. . Various types of scrapers, typically rotating brushes, have been proposed for this adhering matter removing device in the cross-section direction of the belt, but all of them have been used because the scraper and the belt main body are severely worn by the conveyed material adhering to the belt surface. The contact of the belt becomes non-uniform, the scraper efficiency is reduced, and it is necessary to periodically adjust the pressing dimensions and pressing force.

In recent years, a wet type belt conveyor device, which has been widely used due to environmental problems and the like, is generally used. As an example, Japanese Patent Publication No. 58-7567 discloses a cleaning cleaner in which water is sprayed onto a return portion of a belt conveyor to wash away dust attached thereto together with water. The washed slurry is received by a funnel, and the slurry is passed through a conduit to a slurry tank. An apparatus has been proposed in which a concentrated liquid and a purified liquid are separated by a stored wet cyclone, and the purified liquid is recycled. 55-
No. 20312 discloses a device that effectively removes deposits by using a rotating brush by impregnating the deposits on the belt surface with water. As disclosed in Japanese Utility Model Laid-Open Publication No. 2-34515, a water passage is provided at the axis of the rotating brush. A device provided with a spray nozzle for spraying water in the vertical direction of the rotating shaft.
As disclosed in JP-A-80730, a device in which a bend pulley for applying tension to the belt surface is disposed immediately before a water spray nozzle for spraying washing water onto the endless belt surface to improve the washing efficiency, and JP-A-7-35426. As described above, various devices have been proposed, such as equipment in which a plurality of watering devices are arranged on the upstream side of the belt conveyor and on the return portion.

However, any of the above-mentioned wet-type belt conveyors basically has a cleaning cleaner that injects water into a return portion of the belt conveyor to wash off the deposits together with the water, and that a slurry containing the deposits is removed. There is a problem that a purification device and an attached matter separation and recovery device are separately required.

[0005]

As described above, the conventional deposit removing device is constituted only by the scraper device pressing against the belt surface, so that the tip of the scraper device and the belt body are greatly worn by the deposit, The removal efficiency is as low as 80% at best, and there is a problem that the removal efficiency gradually decreases as the use of the conveyor belt progresses, and the amount of the belt falling outward increases. Further, the frequency of work for periodically adjusting the pressing area and the pressing force of the scraper device to maintain the removal efficiency increases and is complicated, and in order to solve this, increasing the pressing force increases the water content and increases the adhesive force. On the other hand, in the case of strong ore or the like, there is a problem that contaminants are pressed against the conveyor belt and the removal efficiency is reduced.

Further, in a cleaner for cleaning a conveyor belt with water, slurry containing deposits cannot be discarded, and a slurry purifying device for separating and recovering deposits and a deposit separation and collection device are separately required. Therefore, there is a problem that running costs are high in addition to the necessity of new capital investment. The present invention is directed to a very compact, high-efficiency, high-efficiency, slurry-purifying device for separating and recovering slurry containing deposits, and a mist-type belt cleaner facility that does not require a deposit separation and recovery device. To provide.

[0007]

SUMMARY OF THE INVENTION The present invention has been made based on the above findings, and the gist thereof is as follows. In a device for pressing a return side portion of a belt conveyor stretched endlessly in a cross-sectional direction from below, a horizontal support roller device disposed in a transfer chute and supporting a conveyor belt in a vertical direction of the conveyor, a plurality of gases and A water-mixed fluid jetting device, and a plurality of belt scrapers attached before and after the plurality of gas- and water-mixed fluid jetting devices so as to be slidable in the vertical direction of the belt cross section, and wastewater generated by the gas-water mixed fluid jetting device. A mist-type belt cleaner equipment provided with a chute to be conveyed by a belt conveyor in the next step, wherein the gas and water mixed fluid jetting device has a cylindrical shape having a width substantially equal to the width of the conveyor belt and faces the conveyor belt. Gas and water mixed fluid 80 to upper position in width direction
This is a mist type belt cleaner equipment incorporating a gas and water mixed fluid jetting device which is a nozzle having a slit capable of spraying water in a range of 100 °.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the mist type belt cleaner equipment according to the present invention thus constructed, since the horizontal support roller device for supporting the conveyor belt in the vertical direction is disposed, the belt is slackened in the width direction. , It is possible to equalize the scraper efficiency in the width direction, and furthermore, a plurality of gas and water mixed fluid ejection devices are arranged, and a belt is provided in front of the plurality of gas and water mixed fluid ejection devices. The layer thickness of the conveyed material is reduced by roughly removing the adhering matter, and a gas-water mixed fluid (mist) is sprayed from below the belt from the gas and water mixed fluid jetting device at a pressure according to the type, properties and layer thickness of the conveyed material. At the same time, the belt is easily released from the belt by spraying on the belt, and at the same time, the belt is scraped by a scraper disposed at the rear of the gas and water mixed fluid jetting device. For lowering the frictional resistance of,
The cleaner efficiency can be increased to a phenomenal value of 90 to 99%.

In the mist type belt cleaner according to the present invention, a gas-water mixed fluid (mist) having a specific pressure is used, but it is most different from the conventional cleaner using a large amount of water. The point may be a watering amount enough to prevent dust generation at about 5 to 30 liters / minute at a pressure according to the type, properties, and layer thickness of the conveyed object, and whether the sprayed mist wets the conveyed object, Since the amount of water is simply contained, no wastewater treatment equipment is required, so that equipment costs can be greatly reduced. Further, dust generation of conveyed materials and the amount of falling ore can be significantly reduced. Therefore, there is an advantage that the working environment near the belt conveyor equipment and the ore yard can be improved.

In the present invention, as described above, the amount of water spray is limited to about 5 to 30 liters / minute, but the amount of water is the amount of water per belt width (usually 1000 to 1200 mm). Dust is generated in the conveyed material represented by the stone, and at 30 liters / min or more, the sprinkled water and the iron ore are slurried and flow down, so that the above range is set. The preferred watering rate is about 5 for iron ore.
It is about 15 liters / minute. The above-mentioned air-water mixed spray fluid can improve the belt cleaning performance with a small amount of water by increasing the pressure with an air compressor, and the amount of air-water is appropriately adjusted depending on the type, properties, and layer thickness of the conveyed material. Adjusting the amount of water spray can improve the cleaning efficiency.

Further, the mist type belt cleaner equipment of the present invention is provided with a gas and water mixed fluid jetting device, which has a cylindrical shape having a width substantially equal to the width of the conveyor belt, and has a width direction opposite to the conveyor belt. A gas / water mixed fluid ejection device, which is a nozzle having a slit through which the gas / water mixed fluid can be sprayed in the range of 80 to 100 °, is incorporated at an upper position. The reason for providing the slit in the nozzle is that the slit width is about 2 mm, and the spray angle is in the range of 80 to 100 °, preferably the nozzle is closed by the deposit and the residue of the deposit when the deposit is released and dropped. It is designed to have an injection angle of about 90 °. With such a slit nozzle, the mist, which is a gas and water mixed fluid, is sprayed at a wide angle to such an extent that the conveyed product is slightly insufficient to contain water, so that it does not become muddy (slurry). It will pass and fall. Therefore, almost no dust is generated at the return portion.

FIG. 2 shows the results of a mist type cleaner efficiency test. The horizontal axis in FIG. 2 represents the amount of mist water (liter / min), and the vertical axis represents the cleaner efficiency (%). In the conventional dry cleaner, the cleaner efficiency is at most 80%. On the other hand, a water spray (water amount: about 1 m ³ / min in a normal method) is added to the dry method, and an air pressure: 0.5 to 7
Spraying water at 15 liters / minute at Kg / cm ² improved the cleaner efficiency to 90%. However, in order to further improve the cleaning efficiency, the air pressure is set to 0.1.
This shows that when mist injection was performed under the conditions of 5 to 1.5 Kg / cm ² and the amount of water: 5 to 10 liters / minute, the cleaner efficiency could be almost 100%.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The mist type belt cleaner equipment of the present invention will be described below in detail with reference to the drawings. FIG. 1 schematically shows a schematic configuration of a mist type belt cleaner equipment according to the present invention, and FIG. 2 is a graph showing a cleaner efficiency in the mist type belt cleaner equipment according to the present invention.
FIG. 3 is a diagram showing an outline of a nozzle incorporated in the mist type belt cleaner equipment according to the present invention.

In FIG. 1, for example, bulk materials such as iron ore, coal, and auxiliary materials are transported at a transport speed of 700 ton / hr.
The transported material used in the apparatus of the present invention has a moisture value of 8%.
Endlessly stretched two types of conveyor belts 1 of 1200 mm and 2400 mm in length for transporting and carrying Karajas powder ore are turned by a head pulley 4 at a return section 3 provided in a transport connecting chute 2, and in the opposite direction. Be run. A rotary brush type coarse removal cleaner 5 having an adjustable pressing force is provided below the head pulley 4 of the return section 3 to roughly remove the deposits adhering to the surface of the traveling conveyor belt. The coarse removal cleaner 5 does not need to be pressed against the traveling conveyor belt, and may have some gaps. The deposits removed by the coarse removal cleaner 5 fall and pass through the chute 2, more specifically, the branch chute 2-1, and are transferred to the next connecting belt conveyor. Since the conveyor belt needs to be constantly stretched in order to increase the transport efficiency, the conveyor belt that has passed through the return section 3 then enters the horizontal support roller device 6 that supports the conveyor belt in the vertical direction. The horizontal support roller device 6 includes a snap pulley 7 that pushes up a surface opposite to the conveyor belt surface in contact with the head pulley 4 from below to an upward direction to apply a stretching force, the head pulley 4 and the snap pulley. 7 and a pressing roll 8 which is in contact with the conveyor belt on the same surface as the surface in contact with the head pulley 4. By adopting such a configuration, the conveyor belt is deformed in the belt width direction during conveyance, and it cannot maintain horizontal, or the contact between the scraper and the belt becomes uneven due to vertical vibration, and a gap is created. In order to reduce the cleaner efficiency, the backside of the belt above the gas-water spray nozzle of the gas and water mixed fluid ejection device is supported in the belt width direction, so that the displacement amount in the belt width direction is made uniform and horizontal. The belt can be conveyed at the position, and the vibration is suppressed to suppress the slack in the width direction of the conveyor belt and the slack in the longitudinal direction, and always control the tension of the conveyor belt, and the scraper efficiency. Can be made uniform in the width direction.

A characteristic feature of the present invention is that a plurality of gas and water mixed fluid jetting devices 9 are provided between the rough removal cleaner 5 and the presser roll 8. As shown in FIG. 3, the gas / water mixed fluid jetting device 9 has a cylindrical shape having a width substantially equal to the width of the conveyor belt, and sprays the gas / water mixed fluid at an upper position in the width direction opposed to the conveyor belt. The nozzle 11 has a plurality of slits 10 having a width of 2 mm in a direction orthogonal to the width of the conveyor belt capable of water spraying in the range of (θ) of 80 to 100 °, preferably 90 °. This gas and water mixed fluid ejection device 9 has a conveyor belt width of 1200 m.
1 m, conveyor belt width 2400 mm
In this case, it is preferable to provide two. This nozzle 11
In water, water (5 to 15 liters / min) and air (0.5 to 7 kg / cm ² G) sent from separate conduits are mixed immediately before the nozzle 11 to form a mist. Sprayed on the conveyor belt surface under cleaning pressure for cleaning. The above-mentioned water is supplied from a separately provided water pump, and the air is supplied from a separately provided air compressor, and both are designed to be activated by a start signal of a belt conveyor. As described above, the deposits still adhering to the conveyor belt surface which has been roughly cleaned by the coarse removal cleaner 5 are softened to such an extent that the mist sprayed from the gas / water mixed fluid jetting device 9 contains water. The softened deposit is provided with a plurality of belt scrapers 12 and 13 which are attached so as to be slidable in front of and behind the plurality of gas- and water-mixed fluid jetting devices 9 and preferably on the cross section of the conveyor belt. Remove all deposits from the conveyor belt. This belt scraper may be a commercially available scraper as long as it has a function of blowing high-pressure air to remove deposits. However, the cleaner efficiency may vary depending on the type of the scraper. The deposits removed from the conveyor belt by these belt scrapers 12 and 13 and the sewage generated by the gas and water mixed fluid jetting device are collected in the chute 2-2 and conveyed by the belt conveyor in the next step.

Further, in the mist type belt cleaner equipment of the present invention, by providing a collection chute having a relatively large shape so as to cover the entire return portion, the conveyed material collected together with the sewage can be collected by the collection chute. It is conveyed and deposited on the belt conveyor of the line, but the shape of the cross section of the flow is circular, arc-shaped, or with an appropriate arc at the corner so that the conveyed material does not adhere to the inner surface of the collection chute. By attaching a lubricating material to, or by using a stainless steel material having both rust prevention and lubrication, the adhesive force of the adhered substance is reduced, and the cleaning action by the water jet device provided at the upper end of the recovery chute is performed. It was also possible to wash the inner surface of the collection chute.

[0017]

As described above, the present invention far exceeds the conventional cleaner efficiency of about 80% in a dry system or a wet system using a large amount of water for removing adhering substances on a belt conveyor with a simple apparatus. 90 to 10 cleaner efficiency
Since it can be improved to 0%, the falling amount of the conveyed material such as ore can be extremely reduced, and the work of treating dropped ore deposited on the ground can be greatly reduced. Further, since the adhered matter adhered to the conveyor belt can be easily scraped off, wear of the belt main body and wear of the return roller can be suppressed at the same time, so that maintenance costs can be reduced. Further, there are many advantages such as eliminating the necessity of installing a purification apparatus for purifying slurry, sewage, and the like generated from conventional mass use, and also enabling reduction of running costs.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a schematic configuration of a mist type belt cleaner equipment according to the present invention.

FIG. 2 is a graph showing a comparison of cleaner efficiency between a mist type belt cleaner system according to the present invention and a conventional belt cleaner type.

FIG. 3 is a diagram showing an outline of a nozzle incorporated in the mist type belt cleaner equipment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Conveyor belt 2, 2-1 and 2-2 ... Chute 3 ... Return part 4 ... Head pulley 5 ... Cleaner for rough removal 6 ... Horizontal support roller device 7 ... Snap pulley 8 ... Holding roll 9 ... Gas and water mixed fluid Spouting device 10 Slit 11 Nozzle 12, 13 Belt scraper

Claims (2)

[Claims] 1. A device for pressing a return-side portion of a belt conveyor stretched endlessly in a cross-sectional direction from below, comprising: a horizontal support roller device disposed in a transfer connecting chute and supporting the conveyor belt in a vertical direction of the conveyor. A plurality of gas and water mixed fluid ejecting devices, a plurality of belt scrapers and a gas and water mixed fluid ejecting device attached so as to be slidable in the vertical direction of a belt cross section before and after the plurality of gas and water mixed fluid ejecting devices. A mist-type belt cleaner, characterized by comprising a chute for conveying the wastewater generated in (1) by a belt conveyor in the next step. 2. The gas and water mixed fluid jetting device according to claim 1,
Cylindrical with a width approximately equal to the conveyor belt width,
A gas and water mixed fluid ejection device, which is a nozzle having a slit capable of spraying a gas and water mixed fluid in a range of 80 to 100 [deg.] At a widthwise upper position opposite to the conveyor belt, is built-in. The mist type belt cleaner equipment according to 1.