KR20190083386A - Dust Reducing Device of Transferred Material using the Fog - Google Patents

Abstract

The present invention relates to a dust reduction apparatus which is able to reduce dust generated in a process of transferring a transfer object containing coal. The present invention includes: a reclaimer which has a bucket capable of transferring a transfer object including coal and a frame supporting the bucket; and a plurality of fog nozzles which is combined with the frame to be able to spray minute fog capable of falling dust as the reclaimer is attached to the dust generated in a process of transferring the transfer object. Therefore, the dust reduction apparatus according to the present invention is able to prevent the scattering of coal dust by being installed in a coal yard, a conveyor, a windbreak wall and the like which are areas where the coal dust of a thermal power plant is scattered, and increase the efficiency of work by easily securing fields of view since coal dust is scattered when coal is loaded with the reclaimer in an indoor or outdoor coal yard for coal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dust-

The present invention relates to a conveying dust reduction apparatus using a fine fog, and more particularly, to a method and apparatus for reducing the generation of dust by collecting dust generated in the process of conveying a conveyed matter including coal, Lt; / RTI >

The amount of fine dust generated in Korea is increasing every year. These fine dusts cause severe air pollution and threaten people's health. Fine dust is generated in vehicles, but fine dust generated from coal-fired power plants also occupies a large portion. There are two types of fine dust generated from a coal-fired power plant: coal fly ash and coal dust generated after coal is burned in a boiler. Fly ash is collected and desorbed using desulfurization, denitrification, and electric dust collection facilities, but the technology to reduce the generation of coal dust is in a very limited situation.

Coal from a coal-fired power plant is pumped to a reclaimer for transporting and transporting it in a coal yard, then stored in a storage space such as a sidewall along a conveyor, and then shredded by a ball mill to be supplied to the boiler. Secondly, when coal is pumped into a bucket of reclaimer and secondly coal is dropped from reclaimer to belt conveyor, coal dust is the most common. This scattered coal dust is not only detrimental to the health of workers, but also a major factor in polluting the surrounding air.

The amount of coal dust generated from coal-fired power plants in the country and conveyor transfer equipment is about 400 tons / year. On the other hand, coal dust is scattered in the process of transferring and transporting coal from a coal-unloading unit, coal low-carbon zone, low-carbon coal, Since some of these facilities are unsealed facilities, a large amount of coal dust may be generated in the process of transferring the coal, and inevitably a large amount of coal dust is generated in the process of transferring, sorting, cullet, and crushing.

Coal dust generated from the outside of a power plant affects the pollution of the atmospheric environment in the neighboring area, and the coal dust generated in the indoor of the power plant causes deterioration of work environment and deteriorates working efficiency.

In addition, since coal dust is exposed to the atmosphere during transportation, it may spontaneously ignite due to the accumulation of oxidation heat released by coal in association with oxygen. In other words, coal dust may be scattered into the atmosphere or spontaneously ignite by oxidation heat as it comes into contact with air during storage, transport, and differential processing.

In the prior art, a method of spraying water to the upper part of the coarse coal using a hose or the like is applied to reduce scattered coal dust. However, when the water is sprayed, the coal may be wetted with water, and the dust may be scattered during the process of water spraying or water evaporation.

[Related Technical Literature]

Registration Practical Utility Model No. 20-0349894 (published on May 10, 2004)

Accordingly, it is an object of the present invention to provide a dust abatement device capable of preventing scattering of coal dust by installing coal lagoons, a conveyor, a windshield wall, etc., which are areas where coal dust of a thermal power plant is scattered.

Another object of the present invention is to provide a dust abatement apparatus capable of easily securing a clock by scattering coal dust when coal is recharged by a reclaimer.

Yet another object of the present invention is to provide a dust abatement device which is simple in use, simple in structure, simple in structure, small in installation space, and capable of reducing water consumption.

It is another object of the present invention to provide a dust abatement apparatus capable of removing a factor that spontaneously ignites by adding water to coal dust.

Accordingly, an object of the present invention is to provide a reclamer having a bucket for conveying a feed containing coal and a frame for supporting the bucket; And a plurality of fog nozzles attached to the frame so as to be able to spray fine fog which is attached to the dust generated in the process of conveying the conveyed matter and can lower the dust. ≪ / RTI >

Another object of the present invention is to provide a belt conveyor for conveying a conveyed material including coal; And a plurality of fog nozzles attached to the belt conveyor so as to spray fine fog which is attached to dust generated in the process of conveying the conveyed matter loaded on the belt conveyor and can lower the dust. And a dust-reducing device.

It is another object of the present invention to provide a method and a device for preventing the dust generated by an external force including wind from moving in a place where a conveyed object containing coal is moved, A windward wall; And a plurality of fog nozzles provided on the windshield wall and attached to the dust passing over the windshield wall to spray a fine fog which can lower the dust. .

It is also preferable that the fog nozzle is sprayed from the frame, the belt conveyor or the windshield wall to the dust scattered from the conveyed object.

The average particle size of the droplet sprayed from the fog nozzle is preferably smaller than the average particle size of the dust.

Thus, according to the present invention, it is possible to provide a dust abatement device capable of preventing scattering of coal dust by installing coal lagoons, a conveyor, a windshield wall, etc., which are areas in which coal dust in a thermal power plant is scattered.

In addition, it is possible to provide a dust abatement apparatus capable of easily securing a clock by scattering coal dust when reclaiming coal by reclaimer.

Yet another object of the present invention is to provide a dust abatement apparatus which is simple in use, simple in structure, simple in structure, small in installation space, and capable of reducing water consumption.

In addition, it is possible to provide a dust abatement apparatus capable of removing a factor that spontaneously ignites by adding water to the coal dust.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic view of a dust abatement device installed on a reclaimer and a belt conveyor according to an embodiment of the present invention; FIG.
1B is a cross-sectional view taken along the width direction of the reclaimer of FIG. 1A,
1C is a schematic view of a dust-reducing apparatus according to an embodiment of the present invention installed on a belt conveyor only,
FIG. 2 is a conceptual view for explaining a process in which a droplet adheres to dust and naturally descends (sinks)
FIG. 3A is a particle size distribution diagram of a fine droplet which is pressurized in a pump according to an embodiment of the present invention and is sprayed from a fog nozzle,
FIG. 3B is a particle size distribution diagram of coal dust to which the present invention can be applied,
Fig. 4 is a photograph showing an example in which a reclaimer is installed in a low-lean interior of a room.

A dust reduction device 100 (hereinafter referred to as a dust reduction device) capable of reducing dust generated from a conveyed product containing coal according to an embodiment of the present invention by using a fine fog is described with reference to FIGS. 4 will be described in detail as follows.

FIG. 1B is a cross-sectional view taken along the width direction of the reclaimer of FIG. 1A, and FIG. 1C is a cross-sectional view of the present invention FIG. 2 is a conceptual view for explaining a process in which a droplet adheres to a dust and naturally descends (settles). FIG. 3 (a) is a schematic view illustrating an embodiment of the present invention FIG. 3B is a particle size distribution diagram of the coal dust to which the present invention can be applied, and FIG. 4 is a graph showing the particle size distribution of fine droplets sprayed from a fog nozzle by a pump according to the present invention. It is a photograph.

The dust reduction apparatus 100 according to the present invention may include various kinds of coal, iron ore, and aggregate as the conveyed material. However, for convenience of explanation, the coal dust is transferred to the reclaimer The dust abatement apparatus 100 will be described as an example.

The dust abatement apparatus 100 includes a reclamer 110 having a bucket 113 and a frame 115 for supporting the bucket 113 so as to be capable of transporting a product containing coal; A plurality of fog nozzles 157 coupled to the frame 115 so as to inject fine fog which can adhere to the dust generated in the course of feeding the conveyed material and lower the dust, ; ≪ / RTI >

The reclaimer 110 is provided with a bucket 113 for scraping or impregnating a conveyed object such as coal or the like to move or transport the object to a desired position, And a driving member (not shown) including a motor and a speed reducer coupled to the frame 115 to provide rotational force to the bucket 113. [

The fog generating unit 150 includes a pump 151 for pressurizing the supplied water to a desired pressure, a suction pipe 155a for supplying water to the pump 151, A discharge pipe 155b for guiding to the fog nozzle 157 and a valve (see 153a in FIG. 1A) which is connected to the suction pipe 155a and the discharge pipe 155b to open and close the supply of water, (See 155b 'in FIG. 1A) for preventing backflow of water on the piping and a discharge pipe 155b for guiding the pressurized water, And a fog nozzle 157 for spraying droplets of a desired size into the droplets.

Although not shown in the drawings, unlike FIG. 4, when the dust abatement device 100 is covered with coal, the dust abatement device 100 may be exposed to the outside. In this case, a windshield may be provided to prevent scattering of the dust by a predetermined height in a space where the dust is scattered by the wind or the like so as not to be scattered outside the predetermined space. In this case, when the above-described fog nozzle 157 is installed above the windshield wall and the amount of scattered dust exceeds a certain level, the fog nozzle 157 controls fine droplets to be sprayed, thereby increasing the amount of dust over the windshield wall It is preferable to reduce the number.

Among the dust reduction apparatuses 100 having such a configuration, the fog nozzles 157 are disposed on both sides along the longitudinal direction of the frame 115, and the buckets 113 are generated while the coal is conveyed in contact with the conveyed objects It is preferable to spray a fine droplet onto the area where the dust is scattered (see Figs. 1A and 1B).

As shown in FIG. 1A, the fog nozzle 157 is disposed in a region where the conveyed object falls to the belt conveyor 130 in the reclaimer 110, Is preferably collected.

It is needless to say that the dust abatement apparatus 100 may be installed separately only for the reclaimer 110 (not shown) or only for the belt conveyor 130 (see FIG. 1C). That is, the droplet is sprayed toward the conveyed object, which is mounted on the belt conveyor 130 in the dust abatement device 100 and scattered by wind or the like in the process of conveying the conveyed matter to the belt conveyor 130 desirable. On the other hand, in the case of the reclamer 110, the dust is scattered mainly on both side ends of the bucket 115 in the process of pumping the conveyed material for receiving the conveyed material, rather than the conveyed material received in the bucket () (See Fig. 1B).

The operation of the dust abatement apparatus 100 will be described with reference to FIGS. 2 to 3B.

As shown in FIG. 2, when coal dust is floating in the air, high-pressure water is sprayed from the fog nozzle 157 to the outside, and fine droplets adhere to the coal dust particles and fall down due to their own weight. .

In this process, it is important that the coal dust particles and the fog droplet particles adhere well to each other. The way in which these two particles adhere well is that the size of the fog droplet must be smaller than the size of the coal dust particles. The smaller the size of the fog droplet is, the higher the possibility of adhesion to the coal dust particles becomes, and the coal dust particles can be settled more effectively. Also, the number of fog droplets per unit volume should be large (fog droplet hold-up), and the greater the number of fog droplets, the greater the possibility of adhesion to coal dust particles. Therefore, in order to precipitate and remove the coal dust floating in the air, it is necessary to generate a lot of fine fog droplets.

3A and 3B are graphs showing the size distribution of fog droplets and coal dust. Here, the average particle diameter of the fog droplets is 25 μm and the average particle diameter of the coal dust is about 30 μm, so that the average particle diameter of the fog droplets is smaller than that of the coal dust.

If the size of the fog droplet is larger than the size of the coal dust, it is difficult to adhere to the coal dust particles due to the short residence time of the fog droplet in the air. If the fog droplet is large, . The fog droplet particles and the coal dust particles float together in the air, increasing the possibility of mutual deposition and sedimentation. Therefore, the present invention is preferable because it is possible to appropriately select the fog nozzle 157 to effectively precipitate coal dust that fills a small amount of fog droplets per unit volume (increases the fogging-up value).

1A, the fog generating unit 150 includes a 1 mu m filter to remove foreign substances in water, a discharge pipe 155b and a plurality of pressure pipes The pump 151 that can supply the fog nozzle 157 to the fog nozzle 157 and the fog nozzle 157 can selectively use the orifice diameter of 0.15 mm, 0.2 mm, 0.3 mm, and 0.5 mm as needed. It is preferable that the particle size distribution of the droplet sprayed by the fog nozzle 157 by the high pressure in the pump 151 appears as shown in FIG. 3A even if various orifice diameters are changed. Of course, when pressure is generated on the discharge side at a pressure higher than the pressure set by the pump 151, the high pressure is not transmitted to the fog nozzle 157 but is returned to the suction side so that the pump 151 can operate in a set pressure range In the case where the amount to be sprayed is small, the rotational speed of the pump 151 may be varied corresponding to the set pressure.

Because of this configuration, coal dust is generated when the bucket 113 of the reclaimer 110 is pumped up and when it is transferred from the bucket 113 to the belt conveyor 130. Therefore, in the control unit (not shown), the bucket 113 It is preferable to control the pump 151 to operate. A dust sensing sensor (not shown) may be provided in a region where the belt conveyor 130 and the reclaimer 110 meet to control the pump 151 to operate when the coal is unloaded to the belt conveyor 130.

In the prior art, the clock is not secured due to the dust generated when the reclamer (110) operates in the low-temperature indoor space, and the time required for securing the clock by natural sedimentation of the dust is about 40 minutes. However, As a result of using the apparatus 100, the time required for the dust generated during the operation of the reclaimer 110 to coalesce with the fog droplet and to settled was about 20 minutes. Thus, according to the present invention, it is possible to shorten the work interruption time and increase the efficiency of the work.

Thus, according to the present invention, it is possible to provide a dust abatement device capable of preventing scattering of coal dust by installing coal lagoons, a conveyor, a windshield wall, etc., which are areas in which coal dust in a thermal power plant is scattered.

In addition, it is possible to provide a dust abatement apparatus capable of increasing the efficiency of work by easily securing a clock by scattering coal dust when reclaiming coal with reclaimer.

Yet another object of the present invention is to provide a dust abatement apparatus which is simple in use, simple in structure, simple in structure, small in installation space, and capable of reducing water consumption.

In addition, it is possible to provide a dust abatement device capable of removing factors that can spontaneously ignite by adding water to the coal dust to a certain extent, and to increase work efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

100: dust reduction device 110: reclaimer
113: Frame 115: Bucket
130: Belt conveyor 150: Fog generator
151: Pump 153a, 153b, 153c:
155a: Suction piping 155b: Discharge piping
157: Fog nozzle

Claims (5)

A reclamer having a bucket and a frame for supporting the bucket so as to be able to transport the conveyed material including coal;
And a plurality of fog nozzles attached to the frame so as to be able to spray fine fog which is attached to the dust generated in the process of conveying the conveyed matter and can lower the dust. Device. A belt conveyor for conveying the conveyed material including coal;
And a plurality of fog nozzles attached to the belt conveyor so as to spray fine fog which is attached to dust generated in the process of conveying the conveyed matter loaded on the belt conveyor and can lower the dust. . A windshield which surrounds said blind spot at a set height so as to prevent dust from being generated by an external force including wind from moving to a place where the conveyed material containing coal is moved outside;
And a plurality of fog nozzles provided on the windshield wall and attached to the dust passing over the windshield wall to spray a fine fog which can lower the dust. . 4. The method according to any one of claims 1 to 3,
Wherein the fog nozzles are sprayed from the conveyor to the dust scattered from the conveying object by being disposed along the longitudinal direction of the frame, the belt conveyor or the windshield. 5. The method of claim 4,
Wherein an average particle size of droplets sprayed from the fog nozzles is smaller than an average particle size of the dust.

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