KR101295167B1 - Coal separation apparatus - Google Patents

Abstract

Coal selection device according to the invention the main body; First deck; guide; Air blowing fan; And a vibration unit.

Description

Coal Separation Apparatus

The present invention relates to a coal sorting apparatus, and to a coal sorting apparatus for sorting coal and gangue contained in raw coal.

As the price of crude oil has exploded in recent years, efforts to secure energy sources that can replace crude oil are increasing. Research into new energy sources that can replace existing fossil fuels such as solar energy and bioenergy is being actively conducted, but there are still many limitations in industrial use. Recently, demand for coal has increased again.

Run of mine coal, which is coal extracted from the coal seam, contains a large amount of coal, and has low ash ash and gangue, which is a destructive rock.

At this time, if gangue is contained in the coal, the calorific value decreases during combustion of the coal and harmful gas (SO _x ) is generated. In particular, alkali components (K ₂ O, Na ₂ O) contained in mica, chlorite, and clay in gangue lower the melting point of ash during combustion, causing slagging or fouling inside the thermal power plant boiler, which causes shortening of boiler life. do.

Therefore, in order to improve combustion efficiency and extend the life of a boiler, a technology development for removing gangue mixed with raw coal by physical methods has been attempted.

In the prior art, Korean Patent No. 1010940, a crusher main body having an accommodating part formed therein for accommodating low grade coal and water having a ash content of a predetermined level or more, and the accommodating part of the crusher main body colliding with and rubbing the coal. A wear crusher having a plurality of friction balls for crushing the coal and rotatably installed in the crusher main body, the stirrer for stirring the coal and the friction ball to collide with each other and friction; And a screen installed above the accommodating part of the wear crusher and having a plurality of penetration holes through which only particles having a predetermined size or less can pass therethrough. And a catcher supplying device for supplying a catcher for hydrophobizing the pulverized coal particles to the receiver so that the coal particles crushed in the wear grinder are suspended above the receiver. A high quality coal refiner is presented. In summary, the prior art sorts raw coal by flotation and classifies it into coal particles and gangue particles.

However, the prior art requires a post-treatment process for dewatering and drying the coal particles, which leads to a high cost.

Therefore, it is necessary to develop a variety of coal screening device to solve the above problems.

Korean Patent Registration No. 1010940 (2011.01.19)

The present invention has been made to solve the above problems, it is to provide a coal sorting device that does not require a post-treatment process by screening the coal particles and gangue particles mixed in the raw coal by specific gravity difference.

The coal sorting apparatus 1000 according to the present invention includes a main body 100 having an upper surface formed of an inclined surface 110 inclined to one side in the front-rear direction and one side in the left-right direction, and the inclined surface 110 being opened; A first deck 210 seated inside the inclined surface 110 and having a plurality of first perforations 211 formed therein; A plurality of guides 220 coupled to the top surface of the first deck 210; Raw coal supply unit 300 for supplying the raw coal pulverized product to the upper surface of the first deck (210); An air blowing fan 400 installed inside the main body 100 to blow air into the first perforations 211; And a vibrator 500 which applies the vibration in the horizontal direction to the first deck 210 to discharge the peat particles and the waste-rock particles from the raw coal comminutes in different paths.

In addition, the coal sorting apparatus 1000 is provided between the first deck 210 and the air blowing fan 400, a plurality of agents for dividing the air blown by the air blowing fan 400 into a uniform size A second deck 230 in which two holes 231 are formed; And a frame 240 in which the first deck 210 and the second deck 230 are fitted to the upper and lower surfaces, respectively, to be inclined in the inclined direction of the inclined surface 110 inside the inclined surface 110. It is characterized by including.

In addition, the second deck 230 is characterized in that the second perforation 231 is formed wider than the first perforation 211.

In addition, the coal sorting apparatus 1000 includes the first corner 212, the second corner 213, the third corner 214, and the fourth corner in the order in which the corners of the first deck 210 are positioned high. A first ripple 250 arranged between an upper end of the second corner 213 and an upper end of the fourth corner 215; A second ripple 260 arranged between an upper end of the first corner 212 and an upper end of the third corner 214; And a blocking wall 270 surrounding between an upper end of the first corner 212 and an upper end of the second corner 213.

In addition, the coal sorting apparatus 1000 includes the first corner 212, the second corner 213, the third corner 214, and the fourth corner in the order in which the corners of the first deck 210 are positioned high. In the case of 215, the fourth corner 215 is formed between the upper end of the fourth corner 215 and the upper end of the third corner 214 by the first partition wall 280 and the second partition wall 290. A small amount of gangue among the raw coal pulverized products, which is divided into a first discharge space 216 adjacent to the second discharge space 216 and a second discharge space 217 adjacent to the third corner 214 and supplied to the first deck 210. The coal-mixed particles in which the particles are mixed are discharged into the first discharge space 216, and the gangue particles in which the trace amount of the coal particles are mixed are discharged into the second discharge space 217.

In addition, the coal sorting apparatus 1000 is installed on the upper side of the main body 100, the suction unit 700 for sucking dust; characterized in that further comprises a.

In addition, the coal sorting apparatus 1000 may satisfy the following Equation 1 in a state in which a driving frequency of the air blowing fan 400 is constant and a vibration frequency applied to the first deck 210 is constant.

&Quot; (1) "

^{CR = 0.2173FR 2 - 7.6525FR + 96.385} ( stage, CR raw coal is pulverized combustible material contained in the water recovery ratio, FR is per pulverized raw coal feed rate of the raw coal supply unit (300), FR = 2 ~ 6)

In addition, the coal sorting apparatus 1000 satisfies the following Equation 2 in a state in which the vibration frequency applied to the first deck 210 is constant and the supply amount of raw coal pulverized product of the raw coal supply unit 300 is constant. do.

&Quot; (2) "

CR = 0.0221ABF ² -1.4684ABF + 91.983 (However, CR is the recovery rate of flammable substances contained in the coal pulverization, ABF is the driving frequency of the air blowing fan 400, ABF = 30 ~ 60)

In addition, the first deck 210 is characterized in that the upper surface is formed as a step surface 218.

Accordingly, in the coal sorting apparatus according to the present invention, the coal particles and the gangue particles mixed in the raw coal pulverized product are selectively separated from each other by a specific gravity difference, thereby eliminating the need for a post-treatment process of dehydration and drying.

1 is a perspective view of a coal sorting apparatus according to the present invention
Figure 2 is an exploded perspective view of the coal sorting apparatus according to the present invention
3 is an enlarged perspective view of a vibration unit according to the present invention;
Figure 4 is an exploded perspective view of the first deck, the second deck, the frame according to the present invention
Figure 5 is a perspective view showing an embodiment of the first deck in the present invention
6 is an operation of the coal sorting apparatus according to the present invention
7 is a plan view of Embodiment 1 of a coal sorting apparatus according to the present invention;
8 is an operation of the embodiment 1 of the coal sorting apparatus according to the present invention
9 is a side view of Embodiment 2 of a coal sorting apparatus according to the present invention;

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

In the direction display of the present invention, the vertical direction of the drawing is defined as the vertical direction, the horizontal direction in the left and right directions of the drawing, the horizontal direction in the front and rear directions of the drawing, and the horizontal direction in the horizontal and horizontal directions of the drawing.

1 is a perspective view of a coal sorting apparatus according to the present invention, FIG. 2 is an exploded perspective view of a coal sorting apparatus according to the present invention, and FIG. 3 is an enlarged perspective view of a vibration unit according to the present invention.

As shown in Figure 1 to 2, the coal sorting apparatus 1000 according to the present invention is the main body 100, the first deck 210, the guide 220, the coal supply unit 300, the air blowing fan 400 And a vibrator 500.

The main body 100 is formed in a rectangular parallelepiped shape that becomes wider toward an upper side, and an upper surface is formed as an inclined surface 110 inclined from left to right while inclined from the front side to the rear side, and the center of the inclined surface 110 is opened. A plurality of support members 120 are arranged on the edge of the inclined surface (110).

At this time, the inclined surface 110 is inclined from the front side to the rear side is preferably formed in an inclined form from left to right, the present invention is not limited to this, the inclined surface 110 is one side in the front and rear direction and one side in the left and right direction. As long as it is inclined form can be applied.

The support member 120 is configured to support the component seated on the inside of the inclined surface 110, but may be formed in a cylindrical shape, but the present invention is not limited thereto.

The first deck 210 is formed in a plate shape, and is supported by the support member 120 while being inclined in the inclined direction of the inclined surface 110 to the inside of the inclined surface 110, and a plurality of first perforations. 211 is densely formed in the inclined direction of the inclined surface 110. In addition, the first deck 210 may be formed of a mesh plate, but the present invention is not limited thereto.

When the first corner 212, the second corner 213, the third corner 214, the fourth corner 215 in the order that the corners of the first deck 210 are located in high order, the guide ( 220 is formed long in the direction toward the fourth corner 215, a plurality of are arranged in the direction toward the third corner 214 in the second corner 213 is on the upper surface of the first deck 210 Combined.

The raw coal supply unit 300 supplies the raw coal pulverized product to a place adjacent to the second corner 213 of the upper surface of the first deck 210. In this case, the first perforations 211 may be formed to have a smaller area than the particles contained in the raw coal pulverized product so that the raw coal pulverized product supplied to the upper surface of the first deck 210 does not penetrate.

The air blowing fan 400 may be configured as an air blowing fan, and is installed inside the main body 100 to blow air into the first hole 211.

As shown in FIG. 3, the vibrator 500 may be configured as a vibrator hinged to one end of the first deck 210. The vibration unit 500 may be configured to apply vibration in a horizontal direction to the first deck 210. Of the raw pulverized coal supplied to the upper surface of the first deck 210, the fine particles having the flow force by the air passing through the first perforations 211 along the guide 220, the second corner 213 And discharged between and the fourth corner 215 and has a specific gravity higher than that of the coal particles, has no flow force, fine and plate-shaped gangue particles along the guide 220, the first corner 212 and the third corner 214 It serves to discharge between. Here, the specific gravity of the coal particles is 1.9 kg / m 3 or less, and the specific gravity of the gangue particles is 2.2 kg / m 3 or more.

Accordingly, in the coal sorting apparatus 1000 according to the present invention, the coal particles and the gangue particles contained in the raw coal pulverized product are selectively separated from each other by a specific gravity difference, thereby eliminating the need for a post-treatment process of dehydration and drying.

On the other hand, the vibrator 500 may be composed of a piston (not shown) for applying vibration to the first deck 210 in the horizontal direction to generate a vibration and a crank shaft (not shown) coupled to the piston. have. At this time, the raw coal pulverized product supplied to the upper surface of the first deck 210 is subjected to vibration only by the force pushing in the horizontal direction by the piston, thereby reducing the probability that the particles contained in the raw coal pulverized product collide with each other. .

In addition, in the coal sorting apparatus 1000 according to the present invention, the second corner 213 and the fourth corner 215 are disposed so that the coal particles discharged between the second corner 213 and the fourth corner 215 are guided downward. ) Between the first guide member 610 and the first corner 212 and the third corner so that the gangue particles discharged between the first corner 212 and the third corner 214 are guided downward. It may be configured to further include a second guide member 620 installed between the (214).

In addition, the guide 220 is preferably not formed in the vicinity of the fourth corner 215. When the guide 220 is formed adjacent to the fourth corner 215, fine particles mixed with trace amounts of gangue particles are disposed between the second corner 213 and the fourth corner 215 along the guide 220. It can be discharged.

Figure 4 is an exploded perspective view of the first deck, the second deck, the frame according to the present invention.

As shown in FIG. 4, the coal sorting apparatus 1000 according to the present invention may be blown to the first perforation 211 after the air blown from the air blowing fan 400 is divided into a uniform size. It may be configured to further include a second deck 230, and the frame 240.

The second deck 230 is formed in a plate shape is provided between the first deck 210 and the air blowing fan 400, to divide the air blown from the air blowing fan 400 into a uniform size A plurality of second perforations 231 are formed densely. In this case, the second perforation 231 is formed to have a larger area than the first perforation 211 so that the air blown from the air blowing fan 400 can pass smoothly.

The frame 240 is formed in a plate shape opened in the vertical direction, the first deck 210 and the second deck 230 is fitted on the upper and lower surfaces, respectively, so that the inclined surface ( It is mounted inclined in the inclined direction of 110.

Accordingly, the sorting apparatus according to the present invention further comprises a second deck 230, and the frame 240, so that the air blown from the air blowing fan 400 through the second perforations 231. There is an effect that is supplied to the first perforation 211 after being divided into a uniform size.

At this time, the fine coal particles of the raw coal pulverized product supplied to the upper surface of the first deck 210 by the uniform size of air passing through the first perforations 211, the upper surface of the first deck 210 Each distributed area has a uniform flow force.

Meanwhile, referring to FIGS. 1 and 2, the coal sorting apparatus 1000 according to the present invention may further include a first ripple 250, a second ripple 260, and a barrier wall 270.

The first ripple 250 is arranged between an upper end of the second corner 213 and an upper end of the fourth corner 215 and is discharged between the second corner 213 and the fourth corner 215. The crystallized particles to be guided in one direction. In the drawings, an embodiment in which the first ripple 250 guides the coal particles in the direction toward the fourth corner 215 is illustrated, but the present invention is not limited thereto.

The second ripple 260 is arranged between the upper end of the first corner 212 and the upper end of the third corner 214, and discharged between the first corner 212 and the third corner 214. Guide the gangue particles in one direction. In the drawing, an embodiment in which the second ripple 260 guides the gangue particles in a direction toward the third corner 214 is illustrated, but the present invention is not limited thereto.

The blocking wall 270 is configured to surround between the upper end of the first corner 212 and the upper end of the second corner 213, and the raw coal pulverized material supplied to the upper surface of the first deck 210 may be formed. The first corner 212 and the second corner 213 serves to block so as not to rush out.

5 is a perspective view showing an embodiment of the first deck in the present invention.

As illustrated in FIG. 5, the first deck 210 has an upper surface such that the gangue particles do not move in a direction toward the first corner 212 and the third corner 214. In the direction toward the first corner 212 may be formed as a stepped step surface 218.

6 is an operation of the coal sorting apparatus according to the present invention.

As shown in Figure 6, the operation principle of the coal sorting apparatus 1000 according to the present invention will be described.

First, the raw coal supply unit 300 supplies the raw coal pulverized product to a place adjacent to the second corner 213 on the upper surface of the first deck 210. At this time, the raw coal pulverized product does not rush between the first corner 212 and the second corner 213 by the blocking wall 270.

Next, the air blowing fan 400 blows air to the second perforations 231. At this time, the air blown by the air blowing fan 400 is divided into a uniform size in the second perforations 231, and then blown to the first perforation 211.

At this time, by the air passing through the first perforations 211, the particles contained in the raw coal pulverized product supplied to the first deck 210 has a high flow force in the order of low specific gravity.

In more detail, due to the air passing through the first perforations 211, the fine particles of the coal pulverized product has the highest specific gravity due to the lowest specific gravity, and the fine particles mixed with trace amounts of gangue particles Due to the second low specific gravity, it has the second highest flow force, and the gangue particles mixed with trace amounts of coal particles have the third highest flow force due to the third lowest specific gravity, and the gangue particles have specific gravity. In this highest relationship, there is no flow force.

In this case, in order to more easily show the movement path of the particles contained in the raw coal pulverized, the coal particles are shown in a circle, and the coal particles mixed with a trace amount of gangue particles are shown in a circle combined with a triangle on the surface. Then, the gangue particles mixed with the traces of the fine particles are shown as triangles in which a circle is bound to the surface, and the gangue particles are shown as triangle particles.

Next, the fine particles having the highest flow force by vibrating the first deck 210 in the horizontal direction by the vibrating part 500 are formed along the second corner 213 and the second along the guide 220. The coal particles, which are discharged between the four corners 215 and mixed with the smallest amount of gangue particles having the second highest flow force, cross the guide 220 and the third corner 214 and the fourth corner 215. The gangue particles mixed with the trace amount of fine coal particles, which are discharged to the fourth corner 215 close to each other and have the third highest flow force, pass over the guide 220 and the third corner 214. Between the first and second corners 215 and close to the third corner 214, the gangue particles having no flow force flow along the guide 220 to the first corner 212 and the third corner ( 214).

In this case, the first ripple 250 serves to quickly discharge the coal particles discharged between the second corner 213 and the fourth corner 215 from the upper surface of the first deck 210, The second ripple 260 serves to quickly discharge the gangue particles discharged between the first corner 212 and the third corner 214 from the upper surface of the first deck 210, the first deck 210 The amount of energy consumed can be reduced by increasing the throughput of the coal particles and waste-rock particles supplied to the upper surface of the).

Accordingly, the coal sorting apparatus 1000 according to the present invention can not only sort the raw coal pulverized product into the coal particles and the gangue particles by using the difference in specific gravity, but also the fine coal particles and the trace coal particles mixed with the trace gangue particles. The gangue particles mixed with are also effective to be selected using the difference in specific gravity.

7 is a plan view of Embodiment 1 of a coal sorting apparatus according to the present invention.

As shown in FIG. 7, according to the first embodiment of the coal sorting apparatus 1000 according to the present invention, the first partition wall 280 is disposed between the upper end of the fourth corner 215 and the upper end of the third corner 214. And a second discharge space 217 adjacent to the fourth corner 215 and a second discharge space 217 adjacent to the third corner 214 by the second partition wall 290.

The first partition wall 280 is formed in a direction from the fourth corner 215 toward the first corner 212 and is coupled to an upper end of the fourth corner 215. At this time, the first partition wall 280 has a lower end may be hinged to the upper end of the fourth corner 215.

The second partition wall 290 is formed in the direction from the third corner 214 toward the second corner 213 between the upper end of the fourth corner 215 and the upper end of the third corner 214. Is coupled to. In this case, the second partition wall 290 may have a lower end hinged between the upper end of the fourth corner 215 and the upper end of the third corner 214.

8 is an operation of Embodiment 1 of the coal sorting apparatus according to the present invention.

As shown in Figure 8, the operation principle of the first embodiment of the coal sorting apparatus 1000 according to the present invention will be described.

As described in the operating principle of the coal separation device according to the present invention, the vibrating unit 500 has the highest flow force by applying the vibration in the horizontal direction to the first deck 210 is the guide ( Along the 220, the fine particles discharged between the second corner 213 and the fourth corner 215 and mixed with trace amounts of gangue particles having the second highest flow force are beyond the guide 220. The gangue particles, which are discharged between the third corner 214 and the fourth corner 215 and are mixed with the small amount of fine coal particles having the third highest flow force, pass over the guide 220 and the third corner 214. ) And the fourth corner 215 is discharged, and gangue particles having no flow force are discharged between the first corner 212 and the third corner 214 along the guide 220.

At this time, the refined particles mixed with the trace amount of gangue particles having the second highest flow force are discharged between the third corner 214 and the fourth corner 215, and are adjacent to the fourth corner 215. It is discharged to the first discharge space 216.

In addition, the gangue particles mixed with the trace amount of the fine coal particles having the third highest flow force is discharged between the third corner 214 and the fourth corner 215, which is lower than the fine grains mixed with the fine gangue particles It has a flow force and is discharged into the second discharge space 217 adjacent to the third corner 214.

At this time, when the angle or position of the first partition wall 280 and the second partition wall 290 is adjusted to each other, the trace amount of the fine grain particles mixed with the trace amount of gangue particles discharged to the first discharge space 216. The amount of gangue particles can be adjusted.

9 is a side view of Embodiment 2 of a coal sorting apparatus according to the present invention.

9, the second embodiment of the coal sorting apparatus 1000 according to the present invention is installed on the upper side of the main body 100 to suck the dust generated in the process of sorting the particles contained in the coal pulverized product It may be configured to further include a suction unit 700. At this time, the suction unit 700 may be configured as a vacuum inhaler, but the present invention is not limited thereto.

Hereinafter, the present invention will be described in detail based on the following experimental examples.

<Experimental Example 1>

The quality of the coal is evaluated by the amount of fixed carbon and ash contained in the coal. In other words, the high quality of fixed coal and low ash content is evaluated as high quality coal. The content of fixed carbon and ash is inversely related to each other. That is, if the content of fixed carbon is high, the content of ash is low, and if the content of fixed carbon is low, the content of ash is high.

In the coal sorting apparatus 1000 according to the present invention, the inclined surface 110 of the main body 100 is placed at an inclination angle of 3.5 degrees in the front-rear direction and an inclination angle of 5.5 degrees in the left-right direction, and has a size of 1 x 5 mm and ash ( Ash) The results of screening the first raw coal sample having 61.72%, calorie 2540 cal / g and the second raw coal sample having a particle size of 5 × 25 mm, ash 58.04 &, and calorie 2849 Cal / g are shown in Table 1 below.

sample product Production rate (Wt%) Ash content Fixed Carbon (F.C%) Calorie (Cal / g) Ash removal rate (%) Combustible recovery rate (%) First round Decoction 51 32.82 58.2 4797 75.24 81.71 Coal and gangue mixture 30 48.70 44.7 3780 gangue 19 86.90  5.75 1090 Second round Decoction 30 35.30 63.3 4689 67.66 82 Coal and gangue mixture 25 40.50 53.4 4485 gangue 45 83.87  8.78 1380

As a result of the screening of the primary raw coal sample, 51% of coal, 30% of coal and gangue mixture, and 19% of gangue were separated and screened. In particular, the ash content of coal was reduced from 61.72%, which is the ash content of the first raw coal, to 32.82%, thereby achieving an ash removal rate of about 60.8%. In addition, the calorie of coal was also increased from 2850 cal / g, which is calorie of the first raw coal, to 4690 cal / g.

That is, the coal sorting apparatus 1000 according to the present invention is capable of removing gangue contained in the raw coal pulverized product by simply selecting specific gravity, and does not require a post-treatment facility for drying and dehydration.

<Experimental Example 2>

In the coal sorting apparatus 1000 according to the present invention, the inclined surface 110 of the main body 100 is set at an inclination angle of 3.5 degrees in the front and rear directions and an inclination angle of 5.5 degrees in the left and right directions, and a driving frequency of the air blowing fan 400. With a constant, and the raw coal pulverized product is selected while changing the feed amount of the raw coal pulverized powder of the raw coal supply unit 300 in a state in which the vibration frequency applied to the first deck 210 is constant, the results are shown in Table 2 and same.

Drive frequency of the air blowing fan (Hz) Vibration frequency of the 1st deck (Hz) Raw coal crushed powder supply per hour (ton / hour) % Recovery of combustibles contained in the raw coal comminute 50 45 2 81.71 50 45 2.5 82.00 50 45 3 72.44 50 45 3.5 69.49 50 45 4 68.70 50 45 4.5 68.60 50 45 5 67.57 50 45 5.5 58.03 50 45 6 57.99

As a result of the raw coal pulverization screening, the coal sorting apparatus 1000 according to the present invention uses Equation 1 in a state in which a driving frequency of the air blowing fan 400 is constant and a vibration frequency applied to the first deck 210 is constant. Satisfied.

&Quot; (1) &quot;

^{CR = 0.2173FR 2 - 7.6525FR + 96.385} ( stage, CR raw coal is pulverized combustible material contained in the water recovery ratio, FR is per pulverized raw coal feed rate of the raw coal supply unit (300), FR = 2 ~ 6)

At this time, the correlation coefficient (Correlation coffecient) was calculated for the numerical values of Table 2 and Equation 1, and the correlation coefficient (R ² ) had a high correlation of 0.9013.

<Experimental Example 3>

In the coal sorting apparatus 1000 according to the present invention, the inclined surface 110 of the main body 100 is placed at an inclination angle of 3.5 degrees in the front and rear directions and an inclination angle of 5.5 degrees in the left and right directions, and the vibration applied to the first deck 210. With the frequency constant, the raw coal pulverized product was selected while changing the driving frequency of the air blowing fan 400 in a state in which the raw coal pulverized product feed amount was constant at a time. same.

Vibration frequency of the 1st deck (Hz) Raw coal crushed powder supply per hour (ton / hour) Drive frequency of the air blowing fan (Hz) % Recovery of combustibles contained in the raw coal comminute 45 2.5 30 67.57 45 2.5 35 68.60 45 2.5 40 68.70 45 2.5 45 69.49 45 2.5 50 72.44 45 2.5 55 81.71 45 2.5 60 82.00

As a result of the selection of the raw pulverized coal, the coal sorting apparatus 1000 according to the present invention has the vibration frequency applied to the first deck 210 and the raw coal pulverized coal supply per hour of the raw coal supply unit 300 is constant according to the following equation. 2 was satisfied.

&Quot; (2) &quot;

CR = 0.0221ABF ² -1.4684ABF + 91.983 (However, CR is the recovery rate of flammable substances contained in the coal pulverization, ABF is the driving frequency of the air blowing fan 400, ABF = 30 ~ 60)

At this time, the correlation coefficient (Correlation coffecient) was calculated for the numerical values of Table 3 and Equation 2, and the correlation coefficient (R ² ) had a high correlation of 0.9178.

<Experimental Example 4>

In the coal sorting apparatus 1000 according to the present invention, the inclined surface 110 of the main body 100 is set at an inclination angle of 3.5 degrees in the front and rear directions and an inclination angle of 5.5 degrees in the left and right directions, and the air blowing fan 400 is driven. With the frequency constant, the raw coal pulverized product was selected while changing the vibration frequency of the air blowing fan 400 in a state in which the raw coal pulverized product feed amount was constant at a time. same.

Drive frequency of the air blowing fan (Hz) Raw coal crushed powder supply per hour (ton / hour) Vibration frequency of the 1st deck (Hz) % Recovery of combustibles contained in the raw coal comminute 50 2.5 30 67.57 50 2.5 35 68.60 50 2.5 40 68.70 50 2.5 45 82.00 50 2.5 50 81.71 50 2.5 55 72.44 50 2.5 60 69.49

As a result of the selection of the raw pulverized coal, the coal sorting apparatus 1000 according to the present invention has a constant driving frequency of the air blowing fan 400 and the raw coal pulverized feed per hour of the raw coal supply unit 300 is constant according to the following Equation 3 Was satisfied.

&Quot; (3) &quot;

CR = -0.0447 TF ² + 4.2 145 TF-21.674 (where CR is the recovery rate of the flammable material contained in the raw coal pulverization and TF is the vibration frequency of the first deck 210)

At this time, the correlation coefficient (Correlation coffecient) was calculated for the numerical values of Table 4 and Equation 3, and the correlation coefficient (R ² ) was 0.5491, which was somewhat low.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1000: coal sorting apparatus according to the present invention
100:
110:
210: first deck
211: first puncher 212: first corner
213: Second corner 214: Third corner
215: 4th corner 216: 1st discharge space
217: second discharge space 218: step surface
220: guide
230: second deck
231: Second punch
240: frame
250: first ripple
260: second ripple
270: blocking wall
280: first partition wall 290: second partition wall
300: coal supply unit
400: air blowing fan
500: vibrator
610: first guide member 620: second guide member
700: suction part

Claims (9)

A main body 100 having an upper surface formed of an inclined surface 110 inclined to one side in a front-rear direction and one side in a left-right direction and having the inclined surface 110 open;
A first deck 210 seated inside the inclined surface 110 and having a plurality of first perforations 211 formed therein;
A plurality of guides 220 coupled to the top surface of the first deck 210;
Raw coal supply unit 300 for supplying the raw coal pulverized product to the upper surface of the first deck (210);
An air blowing fan 400 installed inside the main body 100 to blow air into the first perforations 211; And
And a vibrating unit (500) for applying the vibration in the horizontal direction to the first deck (210) to discharge the coal particles and the waste-rock particles in the different paths of the coal briquettes in different paths. .
According to claim 1, wherein the coal sorting apparatus 1000
A second is provided between the first deck 210 and the air blowing fan 400, a plurality of second perforations 231 for dividing the air blown from the air blowing fan 400 into a uniform size is formed Deck 230; And
The first and second decks 210 and 230 are fitted on the upper and lower surfaces, respectively, so that the frame 240 is inclined in the inclined direction of the inclined surface 110 to the inner side of the inclined surface 110. Coal selection device 1000, characterized in that.
The method of claim 2, wherein the second deck 230 is
The coal sorting device 1000, characterized in that the second perforation (231) is formed wider than the first perforation (211).
According to claim 1, wherein the coal sorting apparatus 1000
When the first corner 212, the second corner 213, the third corner 214, the fourth corner 215, the corners of the first deck 210 in the order of high position, respectively,
A first ripple 250 arranged between an upper end of the second corner 213 and an upper end of the fourth corner 215;
A second ripple 260 arranged between an upper end of the first corner 212 and an upper end of the third corner 214; And
A coal sorting device (1000) further comprising a; barrier wall (270) surrounding the upper end of the first corner (212) and the upper end of the second corner (213).
According to claim 1, wherein the coal sorting apparatus 1000
When the first corner 212, the second corner 213, the third corner 214, the fourth corner 215, the corners of the first deck 210 in the order of high position, respectively,
A first discharge between the upper end of the fourth corner 215 and the upper end of the third corner 214 is adjacent to the fourth corner 215 by the first partition wall 280 and the second partition wall 290. A second discharge space 217 adjacent to the space 216 and the third corner 214,
Of the raw coal crushed powder supplied to the first deck 210, the fine coal particles mixed with trace amounts of gangue particles are discharged into the first discharge space 216, and the gangue particles mixed with trace amounts of fine coal particles are the second discharge space. Coal selection apparatus 1000, characterized in that discharged to (217).
According to claim 1, wherein the coal sorting apparatus 1000
And a suction unit (700) installed above the main body (100) to suck in dust.
According to claim 1, wherein the coal sorting apparatus 1000
The coal sorting apparatus 1000, characterized in that the drive frequency of the air blowing fan 400 is constant and the vibration frequency applied to the first deck 210 is satisfied in the following equation (1).
&Quot; (1) &quot;
^{CR = 0.2173FR 2 - 7.6525FR + 96.385} ( stage, CR raw coal is pulverized combustible material contained in the water recovery ratio, FR is per pulverized raw coal feed rate of the raw coal supply unit (300), FR = 2 ~ 6)
According to claim 1, wherein the coal sorting apparatus 1000
The coal sorting apparatus 1000, characterized in that the vibration frequency applied to the first deck 210 is constant and the raw coal pulverized feed per hour supply of the raw coal supply unit 300 satisfies the following equation (2).
&Quot; (2) &quot;
CR = 0.0221ABF ² -1.4684ABF + 91.983 (However, CR is the recovery rate of flammable substances contained in the coal pulverization, ABF is the driving frequency of the air blowing fan 400, ABF = 30 ~ 60)
According to any one of claims 1 to 8, wherein the first deck 210 is
Coal sorting apparatus 1000, characterized in that the upper surface is formed with a stepped surface (218).

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