JPH09328219A - Sprinkling washer for conveyer belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To return sludge fallen in a collecting chute to a conveyer belt while dewatering and reduce load of a waste water treatment device by providing a feed pump for feeding water from a storage tank to a sprinkling pipe and a pipe for circulating wash water between the collecting chute and the storage tank. SOLUTION: A conveyer belt 1a carrying coal 24 sprinkles wash water 25 from a sprinkling pipe 12 provided in a collecting shoot 11 to the bottom face of a return belt 1b in a place of turning a pulley. Finely powdered coal stuck on the surface of the conveyer belt 1a is washed out by the wash water 25, scratched out by a belt cleaner positioned in its rear direction, and fallen in the collecting shoot 11. The sludge 26 precipitated in the bottom of the collecting shoot 11 is scratched by an inclined screw conveyer 13 and a vertical screw conveyer 14 while being dewatered, returned to the conveyer belt 1a via a horizontal screw conveyer 15, and carried to the lower reaches side along with the coal 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for sprinkling and cleaning a conveyor belt of a belt conveyor for transporting bulk materials such as coal.

[0002]

2. Description of the Related Art FIG. 3 is a schematic explanatory view of a conventional sprinkler cleaning apparatus for a conveyor belt. In the figure, a is an upstream belt conveyor for transporting bulk materials such as coal. b is the conveyor belt and c is the return belt.
d is a downstream belt conveyor, e is its conveyor belt, and f is a return belt. g is a conveyor transfer section, which is a section where the coal v transfers from the upstream belt conveyor a to the downstream belt conveyor d. This transit part g
Therefore, the hood x is provided because the coal v drops and the pulverized coal contained in the coal v becomes dust and scatters.

[0003] Further, in the transfer section g, in order to reduce dust generation and to prevent the coal v transported by the belt conveyor d and generated from the pile from being generated from the pile, coal transferred per connection section is provided. About 1% of water w at maximum is sprayed.
For example, when the transport amount of coal v is 3,000 t / h, 30 t / h of water w is sprinkled. Sprinkling is performed aiming at the coal v falling from the sprinkling pipe j at the connecting portion g. on the other hand,
Since pulverized coal adheres to the surface of the conveyor belt b and is scraped off by the belt cleaner r, it does not drop sufficiently in a dry state. Therefore, washing water is supplied from the spray pipe k provided on the return side of the conveyor belt b. Washing with w. After sprinkling the cleaning water w, the moist adhering matter is scraped off by the belt cleaner s. Reference numeral h is a recovery hopper for recovering the wash water w. The upper surface of the recovery hopper h is cleaned by sprinkling cleaning water w from the water spray pipe m. The washing water w flows down from the recovery hopper h to the water storage tank n via the strainer o. Reference numeral p denotes a water supply pump, which sends the wash water w from the water storage tank n to a wastewater treatment device (not shown) provided adjacent to the coal storage yard. The wastewater treatment device is composed of a coagulation stirring tank, a coagulation sedimentation tank, a sludge dewatering device, etc., and the treated water is reused, and the sludge is dewatered and sent to a coal storage plant to be used as fuel.

[0004]

In the conventional sprinkler cleaning apparatus for the belt conveyor described above, the cleaning water is SS.
Since the (amount of suspended solids) is about 5,000 ppm and the flow rate is 1/4 to 1/5 of the flow rate of the chute sprinkling shower, it cannot be discharged as it is, so waste water is treated. The wastewater treatment equipment is provided in a place away from the installation location of the sprinkling and washing equipment, and a long drainage pipe from the sprinkling and washing equipment to the wastewater treatment equipment is required. In addition, the wastewater treatment equipment requires a large amount of a coagulant for wastewater treatment, and the transportation cost for transporting the dehydrated sludge to the coal storage yard is high, resulting in a great running cost. Moreover, since the recovered water with SS of about 300 ppm is conventionally used for watering the chute, the running cost of the pump for supplying the recovered water is high.

The present invention has been devised in view of the above-mentioned problems. The sludge that has fallen on the water collecting chute is returned to the conveyor belt while being dewatered to reduce the load on the wastewater treatment device and reduce its running cost. In addition, the sludge dewatering device can be made compact.

[0006]

In order to achieve the above object, according to the invention of the present application, a return belt cleaning sprinkler provided on the return belt side of a belt conveyor and a position behind the sprinkler for cleaning the return belt. A belt cleaner arranged so that its tip contacts the lower surface of the belt, a water collecting chute provided so as to surround these water spray pipes and the belt cleaner, and while dewatering sludge that has fallen into the water collecting chute. An inclined screw conveyor provided at the bottom of the water collecting chute to convey and return it to the conveyor belt side, a vertical screw conveyor whose lower end is erected adjacent to the rear end of the inclined screw conveyor, and one end of the vertical screw conveyor. A chute that is provided adjacent to the upper end of the screw conveyor, and the other end overhangs above the conveyor belt and opens toward above the conveyor belt. A horizontal screw conveyor having a water storage tank for receiving the washing water from the water collecting chute, a water supply pump for supplying water to sprinkler pipe from water storage tank,
There is provided a sprinkler cleaning device for a conveyor belt, comprising a pipe for circulating cleaning water between a water collecting chute and a water storage tank.

According to a preferred embodiment of the present application, a finishing belt cleaner disposed behind the belt cleaner and having a front end abutting the lower surface of the belt, and a finishing belt cleaner disposed behind the finishing belt cleaner. And a drainer disposed such that the tip end contacts the lower surface of the belt.

Next, the operation of the present invention will be described. When the conveyor belt conveys the coal and goes around the pulley, the washing water is sprinkled from the sprinkling pipe toward the lower surface of the return belt.
The pulverized coal adhering to the surface of the conveyor belt is washed off by the washing water, and is scraped off by the belt cleaner behind it and falls on the water collecting chute. The sludge that has settled on the bottom thereof is scraped up while being dehydrated by the inclined screw conveyor and the vertical screw conveyor, returned to the conveyor belt via the horizontal screw conveyor, and conveyed together with the coal. On the other hand, the upper clear cleaning water separated from the sludge is returned to the water storage tank through the drain pipe. In this way, the wash water is not sent to the wastewater treatment equipment provided in the coal storage yard, but is used while being circulated at the washing place of the conveyor belt, so that the load on the wastewater treatment equipment is reduced and the running cost of the wastewater treatment equipment is reduced. Moreover, since the sludge is dehydrated by the screw conveyor, the sludge dewatering device can be made compact. Furthermore, the surface of the conveyor belt can be completely cleaned by a finishing cleaner and a drainer provided behind the belt cleaner.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view of a conveyor belt sprinkler / cleaner of the present invention, and FIG. 2 is a cross-sectional view of the conveyor belt sprinkler / cleaner of the present invention. In FIG. 1, reference numeral 1 is a belt conveyor that conveys coal 24 and the like. 1a is a conveyor belt of the belt conveyor 1, and 1b is its return belt. Reference numeral 2 is a pulley arranged at the end of the belt conveyor 1. Reference numeral 3 denotes a lower pressing roller of the return belt 1b. Reference numeral 4 denotes two upper straightening rollers arranged at a predetermined interval so as to come into contact with the upper surface of the return belt 1b. The upper straightening roller 4 is arranged at an intermediate position below the upper straightening roller 4 so as to come into contact with the lower surface of the return belt 1b. The return belt 1b is straightened together with the lower straightening roller 5 provided so as to be flat. Similar to the upper straightening roller 4, reference numeral 6 denotes two upper pressing rollers arranged at a predetermined interval so as to come into contact with the upper surface of the return belt 1b, and the return belt 1b is provided at an intermediate position below the upper pressing roller 6. A drainer 10 is disposed so as to abut the lower surface of the. A belt cleaner 7 is arranged on the front surface of the pulley 2 (on the left side in FIG. 1) so as to abut the conveyor belt 1a. The belt cleaner 7 roughly removes the pulverized coal adhering to the surface of the conveyor belt 1a. 8 is a return belt 1b
Is a belt cleaner disposed so as to contact the lower surface of the return belt 1b, and 9 is a finish cleaner disposed so as to contact the lower surface of the return belt 1b. Reference numeral 12 is a belt cleaning water spray pipe for spraying cleaning water 25 toward the lower surface of the return belt 1b, and 12a is this belt cleaning water spray pipe 12
Is a plurality of water spray holes provided in the.

11 is an inclined screw conveyor 13 at the bottom.
The water collecting chute provided with the water collecting chute is provided on the lower surface of the return belt 1b so as to surround the belt cleaning sprinkler tube 12, the belt cleaner 8, the lower straightening roller 5, the finishing cleaner 9 and the drainer 10 to clean the belt. After washing water 25
Sludge 26 scraped off by the belt cleaner 8
And collect. Further, the water collecting chute 11 has a bottom surface inclined in the width direction of the belt conveyor 1, and a groove 11 for accommodating an inclined screw conveyor 13 described later in the center of the bottom surface.
a is provided. The inclined screw conveyor 13
As shown in FIG. 2, a rotary motor 13a, a cylindrical body 13b connected to the groove 11a and having a sludge discharge port at its upper end, a rotary shaft 13b rotated by the motor 13a, and a rotary shaft 13
It is composed of a screw blade 13c spirally provided on b, and the sludge 26 accumulated on the water collecting chute 11 by rotating the screw blade 13c is separated from the cleaning water 25 while being scraped up and conveyed. Has become. It should be noted that the inclination of the inclined screw conveyor 13 separates the washing water 15 and the sludge 26 to facilitate the dehydration of the sludge 26.

Reference numeral 14 denotes a vertical screw conveyor which stands upright adjacent to the rear end of the inclined screw conveyor 13, and has a receiving end for receiving sludge 26 from the sludge discharging port of the inclined screw conveyor 13 at the lower end and a sludge discharging port at the upper end. are doing. One end of the vertical screw conveyor 15 is provided adjacent to the upper end of the vertical screw conveyor 14, and the sludge 26 from the sludge discharge port of the vertical screw conveyor 14 is provided at one end thereof.
Is a horizontal screw conveyor having a receiving port for receiving, and the other end protruding above the conveyor belt 1 and having a chute 15b opened toward the upper side of the conveyor belt 1. The structures of the vertical screw conveyor 14 and the horizontal screw conveyor 15 are substantially the same as the inclined screw conveyor 13. Although the sludge 26 is dehydrated even while being conveyed by the vertical screw conveyor 14, the dehydrated water is discharged from a discharge port (not shown) provided at the lower end of the vertical screw conveyor 14 and returned to the water storage tank 19. ing.

Reference numeral 16 is a water supply pipe having one end connected to the water spray pipe 12 and the other end inserted into the wash water 25 of the water storage tank 19, and a water supply pump 17 and a water spray control valve 22 are provided in the middle of the water supply pipe. Reference numeral 18 is a drain pipe having one end connected to the water collecting chute 11, and the upper clear cleaning water 25 separated from the sludge 26 by the water collecting chute 11 is returned to the water storage tank 19. Reference numeral 20 is a makeup water pipe for supplementing the wash water 25 to the water storage tank 19, and 21 is a makeup water control valve.

Reference numeral 23 is a carrier roller arranged on the lower surface of the conveyor belt 1a so as to support the conveyor belt 1a in a trough shape, and is usually composed of three rollers, and is fixed in the longitudinal direction of the conveyor belt 1a. They are arranged at intervals of.

Next, the operation of the present embodiment will be described.
The belt conveyor 1 carries the coal 24 on the conveyor belt 1a on the upstream side and conveys it on the downstream side. The conveyor belt 1a carrying the coal 24 sprinkles the wash water 25 toward the lower surface of the return belt 1b from the water sprinkling pipe 12 provided in the water collecting chute 11 around the pulley 2. Then, the pulverized coal adhering to the surface of the conveyor belt 1a (the lower surface of the return belt b in the drawing) is washed off by the cleaning water 25, and further scraped off by the belt cleaner 8 behind it and falls on the water collecting chute 11. . Therefore, the sludge 26 that has settled on the bottom of the water collecting chute 11 is scraped up while being dehydrated by the inclined screw conveyor 13 and the vertical screw conveyor 14 and returned to the conveyor belt 1 a via the horizontal screw conveyor 15 and together with the coal 24. It is transported to the downstream side. On the other hand, the upper clear cleaning water 25 separated from the sludge 26 is returned to the water storage tank 19 via the drain pipe 18. In this way, the wash water 25 is not sent to the wastewater treatment device provided in the coal storage yard, but is used while being circulated in the washing place of the conveyor belt 1a. Further, the surface of the conveyor belt 1a is cleaned by a finishing cleaner 9 and a water drainer 10 provided behind the belt cleaner 8.

The present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0016]

As described above, according to the present invention, the washing water is used while being circulated in the washing place of the conveyor belt and is not sent to the wastewater treatment equipment provided in the coal storage yard, so that the load of the wastewater treatment equipment is reduced. And the running cost of the wastewater treatment equipment can be reduced. Further, since the sludge is dehydrated while being conveyed by the screw conveyor, the sludge dewatering device can be made compact, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a conveyor belt watering and washing apparatus of the present invention.

FIG. 2 is a transverse cross-sectional view of a sprinkler cleaning apparatus for a conveyor belt according to the present invention.

FIG. 3 is a schematic explanatory view of a conventional sprinkler cleaning device for a conveyor belt.

[Explanation of symbols]

 1 Belt Conveyor 1a Conveyor Belt 1b Return Belt 2 Pulley 3 Lower Pressing Roller 4 Upper Straightening Roller 5 Lower Straightening Roller 6 Upper Pressing Roller 7,8 Belt Cleaner 9 Finishing Cleaner 10 Drainer 11 Water Collecting Chute 11a Groove 12 Sprinkling Pipe 12a Sprinkling Hole 13 Inclined screw conveyor 13a, 14a, 15a Rotation motor 13b Cylindrical body 13c Rotation shaft 13d Screw blade 14 Vertical screw conveyor 15 Horizontal screw conveyor 16 Water feed pipe 17 Water feed pump 18 Drain pipe 19 Water storage tank 20 Make-up water pipe 21 Make-up water control valve 22 Water sprinkling control Valve 23 Carrier roller 24 Coal 25 Wash water 26 Sludge

Claims (2)

[Claims] 1. A return belt cleaning sprinkler pipe provided on the return belt side of a belt conveyor, a belt cleaner disposed behind the sprinkler pipe so that its tip abuts on the belt lower surface, and these. A water collecting chute provided so as to surround the water sprinkling pipe and the belt cleaner, and sludge provided in the water collecting chute so that sludge dropped in the water collecting chute is conveyed while being dehydrated and returned to the conveyor belt side. And a vertical screw conveyor whose lower end is erected adjacent to the rear end of the inclined screw conveyor, one end is provided adjacent to the upper end of the vertical screw conveyor, and the other end is above the conveyor belt. Along with overhanging, the horizontal screw conveyor with a chute that opens toward the top of the conveyor belt and the cleaning water from the water collecting chute A sprinkler cleaning device for a conveyor belt, comprising: a water storage tank that receives the water; a water supply pump that supplies water from the water storage tank to a water sprinkling pipe; and a pipe that circulates cleaning water between the water collecting chute and the water storage tank. . 2. A finishing belt cleaner, which is disposed behind the belt cleaner so that its tip comes into contact with the lower surface of the belt, and a tip located behind the finishing belt cleaner has its tip contacting the lower surface of the belt. The sprinkler cleaning device for a conveyor belt according to claim 1, further comprising a drainer disposed so as to be in contact with each other.