KR20200002695U - Dust water mixing system used in coal storage facilities for coal-fired power plant - Google Patents

Abstract

The present invention collects fine coal dust generated during the operation of a belt conveyor that transports coal, which is a fuel for power generation, in a coal-fired power plant, and the dust collector collects the coal dust during the transfer of the collected coal for recycling as fuel. It relates to a dust water mixing system of a coal-fired power plant that can be prevented.
To this end, the present invention mixes the coal dust collected in the dust hopper of the dust collector with hot water to wet-solidify it into a certain shape, thereby preventing the coal dust from being scattered again during transport for recycling of the coal dust. It provides a dust water mixing system for coal-fired power plants that reduces load, improves operation efficiency, and prevents environmental pollution.

Description

Dust water mixing system of coal-fired power plant {DUST WATER MIXING SYSTEM USED IN COAL STORAGE FACILITIES FOR COAL-FIRED POWER PLANT}

The present invention relates to a dust water mixing system of a coal-fired power plant, and more specifically, the collection of fine coal dust generated in a coal-fired power plant and re-transporting it for use as fuel is prevented from scattering the collected coal dust again. It relates to a dust water mixing system of a coal-fired power plant that can be prevented.

In general, the power generation process of a coal-fired power plant is a process of putting pulverized coal powder into the furnace of a boiler for combustion, a process of vaporizing water according to combustion, and a process of rotating a turbine with steamed steam to generate power. Including.

In such a coal-fired power plant, a belt conveyor is used to transport coal between each power generation process, and the belt conveyor repeats a circulation operation of loading coal for power generation and transferring it to a predetermined position.

In this way, as the process of transferring coal, which is a fuel for power generation, between each power generation process in a coal-fired power plant is repeatedly carried out, the pulverized coal contained in the coal and the dust of the dry coal are scattered, resulting in contamination of facilities and poor working environment have.

In order to solve this problem, a separate dust collector is required to collect coal dust scattered on the equipment of the belt conveyor.

To this end, conventionally, a hood for sucking coal dust is installed around a place where a large amount of coal dust is generated in a coal-fired power plant, that is, a belt conveyor that transports coal, and a dust collector is connected to the hood. It is used to inhale coal dust generated from conveyor equipment.

In addition, a dust hopper for collecting the sucked coal dust is disposed under the dust collector.

Therefore, when the dust hopper collects more than a certain amount of coal dust, the collected coal dust is transferred back to a place for recycling using a belt conveyor.

However, when the coal dust collected in the dust hopper is transferred again using a belt conveyor, the speed of the belt conveyor and when it falls from the drive chute, coal dust is re-dispersed to the surroundings, thereby further re-contaminating the surrounding environment. have.

Therefore, there is a need for technology development to prevent the re-scattering of coal dust when the coal dust collected in the dust hopper is transferred back to a place for recycling.

Public Patent Publication Publication No. 10-2012-0113787 (published on October 15, 2012)

The present invention was devised to solve the conventional problems as described above. When the coal dust collected in the dust hopper is transferred back to a place for recycling using a belt conveyor, the coal dust is mixed with hot water to form a wet type. The purpose of this is to provide a dust water mixing system for a coal-fired power plant that prevents the coal dust generated during transport from being scattered again by solidifying it and prevents environmental pollution caused by coal dust.

The present invention for achieving the above object is a dust hopper equipped with a level detection sensor that detects the amount of coal dust collected at the bottom where coal dust is collected in a coal-fired power plant, and a dust hopper equipped with an electric rotary valve at the outlet, and a lower outlet of the dust hopper. A dust mixer connected to the hot water to mix coal dust with hot water, a molding discharger connected to the outlet of the dust mixer to solidify the hot water and the mixed coal dust into a predetermined shape, and into the interior of the dust mixer and the molding discharger. A hot water supply device for supplying hot water for smooth mixing with coal dust, and a hot air supply device for supplying hot air for water removal to prevent the mixed wet coal from sticking to the inside of the dust mixer and molding discharger, and the molding In the dust water mixing system of a coal-fired power plant consisting of a molding frame mounted at an outlet of an ejector to form a predetermined shape, the level sensing sensor comprises a first level sensing sensor that transmits a dust collection stop signal of coal dust to a controller, Provides a dust water mixing system for a coal-fired power plant, characterized by comprising a second level detection sensor that transmits a discharge start signal of coal dust to the controller and a third level detection sensor that transmits a discharge stop signal of coal dust to the controller. do.

In the present invention, the dust mixer has a casing having an inlet connected to the outlet of the dust hopper on one side and an outlet formed on the other side, and a casing installed inside the casing to mix coal dust and hot water and transfer it to the discharge port. It is characterized by consisting of a pad-type screw.

In addition, the molded discharger has a casing having an inlet connected to the outlet of the dust mixer at one side and an outlet at the other side, and a casing installed inside the casing to compress and transport hot water and mixed coal dust to the discharge port. It is characterized in that it consists of a tapered screw, and a molding mold that is mounted on the outlet of the casing to mold and discharge the hot water and the mixed coal dust into a predetermined shape.

In addition, the hot water supply device is characterized by comprising a water heater storing hot water, a thermometer, a hot water supply line connected from the water heater to a dust mixer and a molding discharger, and an automatic control valve for adjusting the amount of hot water supplied to the hot water supply line.

In addition, the hot air supply device includes an air preheater that heats air from a compressor, a hot air supply line connected from the air preheater to a dust mixer and molding discharger, and an automatic control valve for adjusting the amount of hot air supplied to the hot air supply line. It is characterized by that.

The present invention provides the following effects through the above-described problem solving means.

First, according to the present invention, the coal dust generated during the transfer of coal from the coal-fired power plant to the belt conveyor is collected in the dust hopper of the dust collector, and the collected coal dust is recycled using a belt conveyor. By mixing with and discharging wet solidification in a certain shape, it is possible to easily prevent scattering again during transportation due to the collected coal dust.

Second, according to the present invention, when the collected coal dust is wet-solidified into a predetermined shape and processed, the load of the existing dust collector is reduced, thereby improving the operation efficiency and preventing further contamination of the surrounding environment.

1 is a schematic diagram showing a dust water mixing system of a coal-fired power plant according to the present invention.
Figure 2 is a cross-sectional view showing a dust water mixing system of the coal-fired power plant according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Attached Figure 1 is a schematic diagram showing a dust water mixing system of a coal-fired power plant according to the present invention, Figure 2 is a cross-sectional view showing the dust water mixing system of the coal-fired power plant according to the present invention, reference numerals in the accompanying drawings 10 indicates dust hopper.

The main focus of the present invention is to collect coal dust generated in a coal-fired power plant and wet-solidify the collected coal dust into a predetermined shape so that coal dust does not occur again during transport.

As shown in the figure, a hood for collecting coal dust is installed around the drive chute of a belt conveyor that transports coal in a place where a large amount of coal dust is generated in a coal-fired power plant, and the hood provides suction power. The collector is connected, and a dust hopper 10 for collecting the collected coal dust is disposed under the dust collector.

At the outlet of the dust hopper 10, an electric rotary valve 16 that operates when the coal dust collected in the dust hopper 10 is discharged is mounted.

In addition, a level detection sensor 12 is mounted at a certain position of the dust hopper 10 to detect the amount of coal dust collected.

Preferably, the level detection sensor 12 includes a first level detection sensor 12-1 mounted at the top from the bottom of the dust hopper 10, and a third level detection sensor 12-3 mounted at the bottom of the dust hopper 10. ), and a second level detecting sensor 12-2 mounted between the first level detecting sensor 12-1 and the third level detecting sensor 12-3.

Accordingly, the first level detection sensor 12-1 transmits a dust collection stop signal of the coal dust to the controller 14 when coal dust above the upper limit value is collected in the dust hopper 10, and the second level detection sensor ( 12-2) transmits a signal to start discharging coal dust to the controller 14 when coal dust below the upper limit and above the lower limit is collected in the dust hopper 10, and the third level detection sensor 12-3 When the hopper 10 is less than the lower limit, a signal to stop the discharge of coal dust is transmitted to the controller 14.

Therefore, when the second level sensor (12-2) transmits a signal to start discharging coal dust to the controller (14), the controller (14) operates the electric rotary valve (16), thereby reducing the coal collected in the dust hopper (10). When the dust is discharged to the dust mixer 20 and the third level sensor 12-3 transmits a signal to stop the discharge of coal dust to the controller 14, the controller 14 turns the electric rotary valve 16 By stopping the operation, the discharge of coal dust to the dust hopper 10 is blocked.

The dust mixer 20 is interlocked with an electric rotary valve 16 mounted under the dust hopper 10 and functions to mix coal dust with hot water.

To this end, the dust mixer 20 has an inlet 21 connected to the outlet of the dust hopper 10 on one side, and a casing 24 with an outlet 22 on the other side, and the casing ( It consists of a pad-type screw 23 that is installed inside of 24) and mixes coal dust and hot water and transfers it to the outlet 22.

A molding discharger 30 for solidifying hot water and mixed coal dust into a predetermined shape is connected to the discharge port 22 of the dust mixer 20.

The molding discharger 30 functions to solidify into a certain shape (for example, a large diameter cylinder, a small diameter cylinder, or a crumb shape, etc.) while pressurizing and transferring the mixed coal dust with hot water.

To this end, the molding discharger 30 has an inlet 31 connected to the outlet 22 of the dust mixer 20 on one side, and a casing 34 with an outlet 32 on the other side, A taper screw 33 that is mounted inside the casing 34 to pressurize the hot water and mixed coal dust to the discharge port 32, and the coal dust mixed with hot water by being mounted on the discharge port 32 of the casing 34 It is composed of a mold 35 for molding and discharging the wet pulverized coal of a certain shape (for example, a large diameter cylinder, a small diameter cylinder, or a crumb shape).

At this time, the mold 35 may be adopted in various structures such as a structure in which a plurality of large diameter holes are formed, a structure in which a plurality of small diameter holes are formed, a structure in which a plurality of square frames are formed, as shown in FIG. 2.

A hot water supply device 40 for supplying hot water for mixing with coal dust is connected to the dust mixer 20 and the molding discharger 30.

Preferably, the hot water supply device 40 includes a water heater 41 in which hot water is stored, a hot water supply line 42 connected from the water heater 41 to the dust mixer 20 and the molding discharger 30, and hot water. It consists of a hot water automatic control valve 43 mounted on the supply line (42).

Accordingly, when the hot water automatic control valve 43 is opened and operated by the control signal of the controller 14 and the pump in the water heater 41 is driven, the hot water is transferred to the dust mixer 20 through the hot water supply line 42. And it is supplied to the molding ejector (30).

Preferably, hot water is regulated and supplied to the dust mixer 20 by adjusting the opening degree of the hot water automatic control valve 43, and the required hot water is additionally supplied to the molding discharger 30.

The hot air supply device 50 includes the dust mixer 20 and the molded discharger 30 in order to prevent the internal devices of the dust mixer 20 and the molding discharger 30 from sticking to coal by moisture. It functions to supply warm air for moisture removal inside.

To this end, the warm air supply device 50 is connected to an air preheater 52 that heats air from the compressor 51, and a dust mixer 20 and a molding discharger 30 from the air preheater 52. It consists of a hot air supply line 53 and a hot air automatic control valve 54 mounted on the hot air supply line 53.

Accordingly, when the automatic warm air control valve 54 is opened and operated by the control signal of the controller 14 and the air preheater 52 is operated, the air from the compressor 51 is heated by the air preheater 52. After being converted into warm air, it is supplied to the inside of the dust mixer 20 and the molding discharger 30 along the warm air supply line 53.

On the other hand, the discharge port 32 of the molding discharger 30 is discharged to a belt conveyor 60 in order to transport the wet solidified coal in a certain shape to a recycling place.

Here, the operation of the dust water mixing system of the present invention having the above configuration will be described as follows.

First, when the second level sensing sensor 12-2 transmits a signal to start discharging coal dust to the controller 14, the controller 14 drives the molding ejector 30, the dust mixer 20, and the electric rotary By sequentially operating the valve 16, the coal dust collected in the dust hopper 10 is discharged toward the dust mixer 20.

At this time, the hot water automatic control valve 43 is opened and operated by the operation signal of the electric rotary valve 16 by the controller 14, and hot water is supplied from the water heater 41 to the dust mixer 20.

Accordingly, coal dust entering the casing 24 of the dust mixer 20 is transferred by the pad-type screw 23 and mixed with hot water.

Next, the hot water and the mixed coal dust are introduced into the molding discharger (30).

When the hot water and the mixed coal dust flow into the casing 34 of the molding discharger 30, the hot water and the mixed coal dust are pressurized by the rotation of the taper screw 33 to the outlet 32 of the casing 34. After being transported, while passing through the mold 35, it is wet-solidified into a certain shape (for example, a large diameter cylinder, a small diameter cylinder, or a crumb shape) and discharged.

Finally, it is wet-solidified from the molding mold 25 into a certain shape (for example, a large diameter cylinder, a small diameter cylinder, or a crumb shape) and falls onto the belt conveyor 60, and the belt conveyor 60 operates in circulation. It is transferred to a place for recycling as fuel for thermal power generation.

In this way, after the coal dust generated in the coal-fired power plant is collected in the dust hopper, the coal dust is mixed with hot water to wet solidify it into a predetermined shape, so that it is possible to easily prevent the coal dust from scattering again during transport. As the coal dust is wet and solidified in a certain shape and transported, scattering which was additionally generated due to recycling of the collected coal dust does not occur at all, thereby preventing environmental pollution.

In addition, a hot air supply device 50 is installed to supply hot air in order to prevent malfunctions due to the remaining wetted mixing coal sticking to the internal device while the dust mixer 20 and the molding discharger 30 are stopped. Is done.

Although the present invention has been described with respect to the embodiments, since the embodiments can be implemented by various modifications, it will be said that the scope of the invention is not limited to the embodiments.

10: dust hopper 12: level detection sensor
12-1: 1st level detection sensor 12-2: 2nd level detection sensor
12-3: 3rd level detection sensor 14: controller
16: electric rotary valve 20: dust mixer
21: inlet 22: outlet
23: pad type screw 24: casing
30: molding discharger 31: inlet
32: outlet 33: taper screw
34: casing 35: forming mold
40: hot water supply device 41: water heater
42: hot water supply line 43: hot water automatic control valve
50: warm air supply device 51: compressor
52: air preheater 53: hot air supply line
54: warm air automatic control valve 60: belt conveyor
70: drive suit

Claims (4)

A level sensor (12) is mounted at the bottom of the coal-fired power plant that collects coal dust and is connected to a dust hopper (10) equipped with an electric rotary valve (16) at the outlet, and the lower outlet of the dust hopper (10) A dust mixer 20 for mixing coal dust with hot water, a molding discharger 30 connected to the outlet of the dust mixer 20 to solidify the mixed coal dust with hot water into a predetermined shape, and the dust mixing A hot water supply device 40 that supplies hot water for mixing with coal dust into the inside of the machine 20 and the molding discharger 30, and coal is transferred into the dust mixer 20 and the molding discharger 30. In the dust water mixing system of a coal-fired power plant comprising a hot air supply device 50 for supplying hot air to prevent sticking,
The level detection sensor 12 includes a first level detection sensor 12-1 that transmits a dust collection stop signal of coal dust to the controller 14, and a second level detection sensor 12-1 that transmits a discharge start signal of coal dust to the controller 14. And a level detection sensor 12-2 and a third level detection sensor 12-3 for transmitting a signal to stop the emission of coal dust to the controller 14; The dust mixer 20 includes a casing 24 having an inlet 21 connected to the outlet of the electric rotary valve 16 and an outlet 22 formed at the other side thereof, and the casing 24 A dust water mixing system of a coal-fired power plant, characterized in that it is equipped with a pad-type screw 23 that mixes coal dust and hot water and transfers it to the outlet 22.
The method according to claim 1,
The molding discharger 30 has an inlet 31 connected to the outlet 22 of the dust mixer 20 on one side, and a casing 34 having an outlet 32 on the other side, and the casing 34 ), and a tapered screw 33 that transfers hot water and mixed coal dust to the discharge port 32, and is mounted on the discharge port 32 of the casing 34 to make the hot water and the mixed coal dust into a certain shape. A dust water mixing system of a coal-fired power plant, characterized in that consisting of a molding frame (35) for molding and discharging.
The method according to claim 1,
The hot water supply device 40 includes a water heater 41 in which hot water is stored, a hot water supply line 42 connected from the water heater 41 to the dust mixer 20 and the molding discharger 30, and a hot water supply line ( A dust water mixing system of a coal-fired power plant, characterized in that consisting of a hot water automatic control valve 43 mounted on 42).
The method according to claim 1,
The warm air supply device 50 includes a compressor 51, an air preheater 52 that heats air from the compressor 51, and a dust mixer 20 and a molding discharger 30 from the air preheater 52. A dust water mixing system of a coal-fired power plant, characterized in that consisting of a hot air supply line (53) connected to the hot air supply line (53) and a hot air automatic control valve (54) mounted on the hot air supply line (53).

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