KR102313469B1 - Conveyor Room Dust Reduction System - Google Patents

Abstract

The present invention, a fog spraying unit having a fog nozzle for spraying fine droplets so as to be able to collect the dust scattered from the transported material on the upper portion of the conveyed material for conveying the conveyed material containing coal; a water washing spraying unit having a flushing nozzle for spraying water to enable cleaning of the dust collected on a workbench provided on both sides of the conveyor in the longitudinal direction to which the conveyed material is transferred; The conveyor is inclined so as to gradually increase in the direction in which the conveyed material is transported, and the work table is also inclined to correspond to the conveyor, and a wastewater treatment unit including a wastewater storage tank for accommodating the wastewater washed by the water washing and spraying unit; It is characterized in that the treated water treated with the wastewater recovered and stored in the wastewater storage tank is supplied to the fog spraying part and the water washing spraying part.
Therefore, according to the present invention, it is possible to collect the dust generated in the process of transporting the transported material containing the coal and reduce the possibility of fire or explosion, and automatically wash the collected dust using an inclined workbench. Conveyor room dust abatement systems can be provided.

Description

Conveyor Room Dust Reduction System

The present invention relates to a conveyor room dust reduction system, and specifically, if the dust generated when transferring powder such as coal is accumulated, the dust generated during the transfer of water cleaning by manpower is collected into fine droplets to prevent scattering into the space It relates to a conveyor room dust reduction system with an improved structure to automatically clean the collected dust and recycle wastewater generated during the cleaning process.

The amount of fine dust in Korea is increasing every year. Such fine dust is acting as a cause of serious air pollution and is threatening people's health. Although fine dust is generated from vehicles, etc., fine dust generated from coal-fired power plants also accounts for a large proportion. There are two types of fine dust generated from coal-fired power plants: coal ash fine dust generated after coal is burned in a boiler and coal dust. Coal ash is captured and removed using desulfurization, denitrification, and electric dust collection facilities, but the technology to reduce the generation of coal dust is insufficient.

Coal from coal-fired power plants is pumped from the coal yard to a reclaimer for transport and transport, stored in a storage space such as a silo along a conveyor, and then crushed with a ball mill and supplied to a boiler. In this process, first, The largest amount of coal dust is generated when the coal is pumped into the claimer's bucket, and secondly, when the coal falls from the reclaimer to the belt conveyor. The scattered coal dust not only harms the health of workers but also becomes a major factor in polluting the surrounding air.

Coal dust generated from coal storage and conveyor transfer devices of thermal power plants nationwide is about 400 tons/year. Meanwhile, coal dust is scattered during the process of transporting and transporting coal from the coal unloading facility to the combustion facility, which is a very long section, from the coal unloading machine, the coal storage section, the coal yard, and the upper coal section. Since some of these facilities are not sealed facilities, a large amount of coal dust may be generated in the process of transporting coal.

Coal dust generated outside the power plant affects the air pollution of the surrounding area, and the coal dust generated inside the power plant causes deterioration of the working environment and lowers work efficiency.

In addition, since coal dust is exposed to the atmosphere throughout the transport process, it may spontaneously ignite due to the accumulation of oxidative heat released when coal combines with oxygen. That is, coal dust may be scattered into the atmosphere or spontaneously ignite due to heat of oxidation as it comes into contact with air during storage, transport, and pulverization processes.

In the prior art, a method of spraying water on the upper layer of the stacked coal using a hose or the like is applied in order to reduce scattered coal dust. However, when water is sprayed in this way, the coal is wet and lumps are formed, dust may be scattered in the process of spraying water or water evaporation, and above all, there is a disadvantage that the amount of water used is too much.

In addition, on the side of the conveyor, there is a passage through which workers or managers pass for maintenance, maintenance, etc., and dust scattered from the conveyor accumulates in these passages. ash, etc.) to wash the dust with water. A large amount of water is consumed for cleaning these dusts.

[Related technical literature]

Unexamined Patent Publication No. 10-2019-0083386 (published on July 12, 2019)

Laid-open Patent Publication No. 10-2009-0128930 (published on December 16, 2009)

It is an object of the present invention to provide a conveyor room dust reduction system capable of collecting dust generated in the process of transporting a transported material including coal and reducing the possibility of fire or explosion.

In addition, another object of the present invention is to provide a conveyor room dust reduction system that can automatically wash the collected dust using an inclined workbench.

In addition, another object of the present invention is to provide an eco-friendly conveyor room dust reduction system by recycling the recovered wastewater while minimizing the amount of wastewater generated.

Another object of the present invention is to provide a conveyor room dust reduction system that is simple and convenient to use.

Accordingly, an object of the present invention, a fog spraying unit having a fog nozzle for spraying fine droplets so as to collect the dust scattered from the conveyed material on the upper portion of the conveyed material for conveying the conveyed material containing coal; a water washing spraying unit having a flushing nozzle for spraying water so as to wash the dust collected on a workbench provided on both sides of the conveyor in the longitudinal direction to which the conveyed material is transferred; The conveyor is inclined so as to gradually increase in the direction in which the conveyed material is transported, and the work table is also inclined in response to the conveyor, and a wastewater treatment unit including a wastewater storage tank for accommodating the wastewater washed by the water washing/spraying unit; It is achieved by a conveyor room dust reduction system, characterized in that the treated water treated with the wastewater recovered and stored in the wastewater storage tank is supplied to the fog spraying unit and the water washing spraying unit.

In addition, it is preferable that the fog spraying unit includes a fog pump that pressurizes the droplets to be sprayed at a high pressure from the fog nozzle.

In addition, the wastewater treatment unit includes a wastewater pressure pump for pressurizing the wastewater stored in the wastewater storage tank, a solid-liquid separator in which a solid and a liquid can be separated by the pressing pressure of the wastewater pressure pump, and the treatment processed through the solid-liquid separator It is preferable to include an injection water storage unit for storing water.

In addition, it is preferable that the fog pump and the water washing pump supplying pressurized water to the water washing injection unit are connected to the injection water storage unit.

Preferably, the fog pump supplies pressurized water to the fog nozzle in conjunction with the operation of the conveyor, and the flush pump intermittently operates the flush pump according to a set time to supply pressurized water to the flush nozzle do.

In addition, the dust present in the workbench is washed by the water washing spraying unit and flows downward as wastewater, and a plurality of wash collection members for collecting wastewater flowing downward along the workbench at a set length or position along the workbench. Further, it is preferable that the washing collection member is connected to a wastewater line for guiding the collected wastewater to the wastewater treatment unit, respectively.

Accordingly, according to the present invention, it is possible to provide a conveyor room dust reduction system capable of collecting dust generated in the process of transporting a transported material containing coal and reducing the possibility of fire or explosion.

In addition, it is possible to provide a conveyor room dust reduction system that can automatically wash the collected dust using an inclined workbench.

In addition, it is possible to provide an eco-friendly conveyor room dust reduction system by recycling the recovered wastewater while minimizing the amount of wastewater generated.

In addition, it is possible to provide a simple and convenient conveyor room dust reduction system.

1 is a schematic flowchart of a conveyor room dust reduction system according to an embodiment of the present invention;
Figure 2 is a figure showing the process of descending by combining fine droplets with dust containing coal,
3A and 3B are flowcharts for explaining the operation process of the conveyor room dust reduction system;
4 is a schematic flowchart of a conveyor room dust reduction system according to another embodiment of the present invention.

Conveyor room dust reduction system 100 capable of reducing dust generated from transported material including coal according to an embodiment of the present invention by using fine fog, processing the collected dust, and recycling the treated treated water , hereinafter referred to as a 'dust reduction system') will be described in detail with reference to FIGS. 1 to 4 .

1 is a schematic flowchart of a system for reducing dust in a conveyor room according to an embodiment of the present invention, FIG. 2 is a diagram illustrating a process in which fine droplets are combined with dust containing coal to descend, and FIGS. 3a and 3b are conveyors It is a flow chart for explaining the operation process of the room dust reduction system, Figure 4 is a schematic flowchart of the conveyor room dust reduction system according to another embodiment of the present invention.

The dust reduction system 100 according to the present invention may include various types of fine coal, iron ore, aggregate, powder, etc. as a conveyed material to be conveyed by the conveyor 110, but for convenience of description below, the conveyed material is transferred from a thermal power plant as a raw material. It is assumed that coal is used for

As shown in FIG. 1, the dust reduction system 100 according to the present invention is a fine liquid capable of collecting dust scattered from the conveyed material on the upper portion of the conveyed material of the conveyor 110 for conveying the conveyed material containing coal. a fog spraying unit 140 having a fog nozzle 141 for spraying enemies; A water washing spray unit 150 having a flush nozzle 151 that sprays water to enable cleaning of the dust collected on the work bench 120 provided on both sides of the conveyor 110 in the longitudinal direction to which the conveyed material is transported. Wow; The conveyor 110 is inclined so as to gradually increase in the direction in which the transported material is transported, and the work table 120 is also inclined in response to the conveyor 110 to receive the wastewater washed by the water washing and spraying unit 150. Wastewater storage A wastewater treatment unit 160 including a tank 161; including, the fog spraying unit 140 and the water washing spraying unit 150 for treating treated water recovered and stored in the wastewater storage tank 161 It is characterized in that it is supplied with

The conveyor 110 may be operated at high speed (eg, 120 m/min) as a means of transporting, for example, coal, which is used as a raw material of a thermal power plant. Dust may be generated during a process in which a transported object is loaded onto the conveyor 110 , a process of transporting the transported substance, and a process in which the transported substance is transported or dropped from the conveyor 110 to another conveyor 110 .

The conveyor 110 has a low point at which the conveyed material is loaded and the high point at which the conveyed material falls from the conveyor 110 so that it can be conveyed from the lower side to the upper side, and has a structure having an inclination as a whole.

Since the conveyor 110 contains a lot of dust, the space is sealed, and the sealed space is generally called a 'conveyor room'.

In the process of conveying the conveyed material by the conveyor 110, the concentration of dust inside the conveyor room is about 10,000 to 100,000 μg/m 3 .

Due to this dust concentration, it is difficult to secure visibility inside the conveyor room, so there is a high risk of safety accidents. The possibility of fire or explosion of dust can increase due to the high calorific value of coal dust (about 4,000 to 8,000 kcal).

In order to prevent and reduce such concerns or possibilities, the present inventors have come to derive the present invention.

The work table 120 is a working passage for grasping, replacing, repairing, inspecting, or the like, the state of component parts such as the conveyor 110 and rollers on the side along the inclined conveyor 110 . Since the workbench 120 is adjacent to the conveyor 110, a lot of dust generated from the conveyor 110 is particularly accumulated, and the droplets and the dust sprayed from the fog nozzle 141 are combined and fall a lot.

The spray water storage unit 130 may store clear water to provide the required water to the fog spray unit 140 and the water washing spray unit 150 . The clean water treated in the wastewater treatment unit 160 is supplied to the jet water storage unit 130 to recycle the waste water, and the water that is insufficient due to the waste water treatment or collection process or evaporation is not filled by the amount set by the jet water storage unit 130. consists of a structure.

The fog injection unit 140 includes a fog pump 143 that pressurizes the water supplied from the injection water storage unit 130 to a desired pressure, and a fog pump that supplies water from the injection water storage unit 130 to the fog pump 143 . The fog line 147 for guiding the water pressurized at 143 to the plurality of fog nozzles 141, and the fog line 147 coupled to the fog line 147 to open and close the supply of water, a relief valve, a pressure gauge, etc. ) is preferably composed of a fog fitting member 145, which is an accessory coupled to.

The fog nozzles 141 of the fog spraying unit 140 having such a configuration are disposed on the upper side and/or both sides along the longitudinal direction of the conveyor 110 to collect dust generated while the conveyor 110 operates. It can be collected by droplets sprayed from

A process in which droplets and dust are combined with each other in the dust reduction system 100 will be described with reference to FIGS. 2A and 2B .

As shown in Figure 2a, in a state in which the coal dust is suspended in the air, as high-pressure water is sprayed to the outside from the fog nozzle 141, fine droplets are attached to each other with the coal dust particles, and gravity sedimentation, which descends downward by its own weight, is is done

In this process, it is important to ensure that the coal dust particles and fog droplet particles adhere well to each other. In order to make these two particles adhere well, the size of the fog droplet particles should be smaller than the size of the coal dust particles. The smaller the size of the fog droplets, the higher the possibility of adhesion to the coal dust particles, so that the coal dust particles can be settled more effectively. In addition, the number of fog droplets per unit volume should be large (fog droplet hold-up), and the greater the number of the fog droplets, the greater the possibility of adhesion to coal dust particles. Accordingly, in order to sediment and remove coal dust floating in the air, it is necessary to generate many fine fog droplets.

FIG. 2b is a diagram schematically illustrating the process of falling droplets falling over time in combination with dust.

If the size of the fog droplets is larger than the size of the coal dust, the time the fog droplets stay in the air is short, so it is difficult to attach to the coal dust particles. this gets smaller When the fog droplet particles and the coal dust particles float together in the air, the possibility of sedimentation by adhering to each other is increased. Therefore, the present invention is preferable because it is possible to effectively settling the scattered coal dust by making a large number of fine fog droplets per unit volume by appropriately selecting the fog nozzle 141 (increasing the fog hold-up value).

In addition, the fog spraying unit 140 includes, for example, a fog fitting member 145 including a 1 μm filter to remove foreign substances in water, and a plunger type fog pump capable of discharging a high pressure of about 70 bar. (143) and the fog nozzle 141 can selectively use the orifice diameter of 0.15mm, 0.2mm, 0.3mm, 0.5mm as needed. Of course, although not shown, when the pressure is generated on the discharge side above the pressure set in the fog pump 143, the high pressure is not transmitted to the fog nozzle 141 side but returned to the suction side, and the fog pump 143 operates within the set pressure range. And when the amount of spraying is small, the rotational speed of the fog pump 143 may be varied in response to the set pressure.

Since coal dust is generated when the conveyor 110 is operated by this configuration, the control unit 170 preferably controls the fog injection unit 140 to operate.

In the prior art, the watch was not secured by the dust generated during the operation of the reclaimer in the indoor coal yard or the conveyor room, so the dust naturally settled and the time it took to secure the watch was about 40 minutes, but the dust reduction according to the present invention As a result of using the system 100, the time required to secure the watch was greatly reduced as the dust emitted when the reclaimer was operated was mutually combined with the fog droplets and settling. Accordingly, it can be seen that according to the present invention, it is possible to increase the efficiency of the work by reducing the work stop time.

The water washing spraying unit 150 includes a flushing pump 153 that pressurizes the water supplied from the jetting water storage 130 to a desired pressure, and a flushing pump that supplies water from the jetting water storage 130 to the flushing pump 153 and A flush line 157 for guiding the water pressurized in 153 to the plurality of flush nozzles 151, and a flush line 157 coupled to the flush line 157 to open and close the supply of water, a relief valve, a pressure gauge, etc. ) It is preferable that it consists of a flush fitting member 155, which is an accessory to be coupled.

The flush fitting member 155 may further include a filter or the like, if necessary.

In addition, it is preferable to include an automatic valve so that the valves required for the fog spraying unit 140 and the water washing spraying unit 150 can be automatically controlled by the control unit 170 .

Due to this structure, in the water washing spraying unit 150 , the dust that has descended by combining with the dust or droplets accumulated on the work table 120 can be collected by the wastewater treatment unit 160 using water sprayed from the flushing nozzle 151 . The size of the droplet sprayed from the washing nozzle 151 is much larger than the droplet sprayed from the fog nozzle 141 so that the dust present in the work table 120 can be washed with water. It is preferable that the water sprayed from the flushing nozzle 151 can be controlled by the controller 170 or the administrator can set it as needed so that the water can be sprayed continuously or intermittently.

The wastewater treatment unit 160 collects wastewater from the lower side of the workbench 120 to the wastewater storage tank 161 on the wastewater line 165, and physically treats the wastewater collected in the wastewater storage tank 161 as necessary (naturally). sedimentation, filtration, etc.) or chemical treatment.

The wastewater treatment unit 160 filters the wastewater stored in the wastewater storage tank 161 through the wastewater pump 167 through the wastewater treatment member 163 including, for example, a filter such as a filter press. The liquid is recovered to the waste water storage tank 161, and when clear filtered treated water is generated after being coated in a filter press, etc., the clear filtered water is supplied to the jetting water storage unit 130 where clean water is stored. That is, wastewater generated through wastewater treatment can be recycled. The process of recovering the turbid liquid during the filtration process and supplying clear water to the spray water storage unit 130 may be automatically performed by controlling a valve (eg, an automatic valve not shown) installed in the control unit 170 .

Cakes generated by the filtration means are disposed of as waste.

An operation process of the dust reduction system 100 having such a configuration will be described in detail with reference to FIGS. 3A and 3B as follows.

First, as shown in Figure 3a, when the conveyor 110 operates, the droplets along the conveyor 110 can be effectively and evenly sprayed from the fog nozzle 141 so that they can come into contact with the dust generated from the conveyor 110. have. That is, when the conveyor 110 is operated in the control unit 170 , the fog pump 143 operates and a related valve (eg, an automatic valve) is opened, so that fine droplets of high pressure can be sprayed from the fog nozzle 141 . .

Accordingly, the fine droplets are combined with the dust through the process shown in FIGS. 2A and 2B and fall onto the conveyor 110 or the workbench 120 .

Next, while the conveyor 110 is operating, the water jet unit 150 may be operated, and when the operation of the conveyor 110 is stopped, the water washing unit 150 may be operated.

Then, as shown in FIG. 3B , the water washing and spraying unit 150 operates to wash the work table 120 , and the wastewater treatment unit 160 also operates. Here, the water washing and spraying unit 150 and the wastewater treatment unit 160 may be controlled to operate independently from the control unit 170 .

When the flushing pump 153 operates, the water pressurized by the flushing pump 153 is discharged from the flush nozzles 151 arranged at set intervals along the workbench 120 to remove the dust accumulated on the surface of the workbench 120 downward. The washed and washed wastewater may be collected in the wastewater storage tank 161 .

Here, as needed, a washing collection member that collects each washed wastewater according to the set length of the workbench 120, for example, about 30 to 40m (not shown, space so that the washing water is collected in the upper part like a road collecting well) The formed grating is covered and the washing water is collected at the bottom and collected in a U-shaped box guiding it to the wastewater line), and the wastewater washed into the wastewater storage tank 161 through the wastewater line 165 can be collected. It is preferable to separate and collect the wastewater collected in the intermediate washing collecting member for each set length as described above and transfer it to the wastewater treatment tank 161 through the wastewater line 165 . That is, if the inclination of the work table 120 is not so large and the length of the work table 120 is long, but the width is narrow compared to the length, it will be more preferable that the washing collection member is included.

Because, for example, assuming that the length of the work table 120 is 200 m, the washing water that has washed the dust from the uppermost side must move along the length of 200 m. This is cumulative. This is because the washing efficiency is lowered, so the amount of water to be supplied from the washing nozzle 151 should be further increased toward the lower side.

Here, it is preferable to minimize the amount of wastewater generated by selecting the amount and size of water so that the washing nozzle 151 also has high cleaning efficiency and the accumulated dust can be effectively washed with water.

Next, as shown in FIG. 3b , in the process of treating the wastewater accommodated in the wastewater storage tank 161, the wastewater pump 167 is operated and filtered through the wastewater treatment member 163 including a filter press and initially generated The turbid liquid is recovered to the wastewater storage tank 161 and can be controlled by the control unit 170 to supply cleanly filtered treated water to the injection water storage unit 130 after a certain period of time has elapsed. It is preferable because the wastewater can be treated and recycled in this way.

In addition, the dust reduction system 100 according to the present invention, as shown in FIG. 4, has a different configuration of the water washing spraying unit. That is, in the water washing and spraying units 161 , 167 , 157a , 157 , and 151 according to the present embodiment, the part different from the above example stores the waste water in which the supplied water is not clean water but the water washed the work table 120 is collected. The waste water pump 167 supplies the water stored in the tank 161 to the flush line 157 through the bypass line 157a, and the pressurized water is sprayed from the flush nozzle 151.

That is, according to this embodiment, it is possible to save time and cost due to wastewater treatment, etc., and to use the water that has been washed with the work bench 12 without treating the waste water and use it again as the washing water for the work table 120, and the amount of water used can be dramatically reduced. can be reduced

In this case, the existing flushing pump 153 may be utilized or may not be utilized as needed.

According to the present invention, in the prior art, the worker cleans the dust accumulated on the workbench 120 with water, for example, once every 2 hours, and recycles all the collected wastewater as waste, and the amount of waste generated at the same time It was possible to dramatically reduce the cost of cleaning, and it was possible to obtain the effect of putting the manpower of the cleaning staff to other tasks.

Accordingly, according to the present invention, it is possible to provide a conveyor room dust reduction system capable of collecting dust generated in the process of transporting a transported material containing coal and reducing the possibility of fire or explosion.

In addition, it is possible to provide a conveyor room dust reduction system that can automatically wash the collected dust using an inclined workbench.

In addition, it is possible to provide an eco-friendly conveyor room dust reduction system by recycling the recovered wastewater while minimizing the amount of wastewater generated.

In addition, it is possible to provide a simple and convenient conveyor room dust reduction system.

Here, although several embodiments of the present invention have been illustrated and described, those skilled in the art to which the present invention pertains will appreciate that modifications can be made to the present embodiments without departing from the principles or spirit of the present invention. will be. The scope of the invention will be defined by the appended claims and their equivalents.

100: dust reduction system 110: conveyor
120: work table 130: spray water storage unit
140: fog injection unit 141: fog nozzle
143: fog pump 145: fog fitting member
147: Foregrain
150: water washing injection unit 151: washing nozzle
153: flush pump 155: flush fitting member
157: Suse Line
160: wastewater treatment unit 161: wastewater storage tank
163: wastewater treatment member 165: wastewater line
167: waste water pump 170: control unit

Claims (6)

a fog spraying unit having a fog nozzle for spraying fine droplets so as to be able to collect dust scattered from the conveyed material on an upper portion of the conveyed material for conveying the conveyed material including coal;
a water washing spraying unit having a flushing nozzle for spraying water to enable cleaning of the dust collected on a workbench provided on both sides of the conveyor in the longitudinal direction to which the conveyed material is transferred;
The conveyor is inclined so as to gradually increase in the direction of transporting the transported material, and the work table is also inclined in response to the conveyor, and a wastewater treatment unit including a wastewater storage tank for accommodating the wastewater washed by the water washing and spraying unit;
Conveyor room dust reduction system, characterized in that the treated water treated with the wastewater recovered and stored in the wastewater storage tank is supplied to the fog spraying part and the water washing spraying part. According to claim 1,
The fog spraying unit, Conveyor room dust reduction system, characterized in that it comprises a fog pump that pressurizes the droplets to be sprayed at a high pressure from the fog nozzle. 3. The method of claim 2,
The wastewater treatment unit includes: a wastewater treatment member including a wastewater pressure pump for pressurizing the wastewater stored in the wastewater storage tank; Conveyor room dust reduction system, characterized in that it comprises a spray water storage unit for storing the treated water through the. 4. The method of claim 3,
Conveyor room dust reduction system, characterized in that the fog pump and the water washing pump for supplying pressurized water to the water washing injection unit are connected to the injection water storage unit. 5. The method of claim 4,
The fog pump supplies pressurized water to the fog nozzle in conjunction with the operation of the conveyor,
The flushing pump intermittently operates the flushing pump according to a set time to supply pressurized water to the flushing nozzle. 5. The method of claim 4,
The dust present in the workbench is washed by the water washing and spraying unit and flows downward as wastewater,
Further comprising a plurality of washing collection collection members for collecting wastewater flowing downward along the worktable at a set length or location along the worktable,
The washing water collection member is a conveyor room dust reduction system, characterized in that each connected to a wastewater line for guiding the collected wastewater to the wastewater treatment unit.

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