KR101497564B1 - Device for Flattening of Transportation Coal in System for Drying Coal - Google Patents

Abstract

The present invention relates to a device for flattening transferred coal in a coal drying apparatus and, more specifically, to a device for flattening transferred coal, which has improved drying efficiency by uniformly dispersing coal put into a multistage dryer from a grinder in the multistage dryer drying coal by using a reheating steam. The coal drying apparatus comprises a first coal dryer and a second coat dryer, wherein the coal primarily dried in the first coat dryer is put into the second coal dryer to be secondarily dried.

Description

Background of the Invention Field of the Invention [0001] The present invention relates to a device for flattening coal in a coal drying apparatus,

The present invention relates to a device for leveling coal conveyed in a coal drying apparatus, and more particularly, to a multi-stage dryer in which coal is dried by using reheating steam. The coal to be fed from a differentiator to a multi- The present invention relates to a conveyance planarizer for improving the quality of a conveyed coal.

Generally, a coal-fired thermal power plant burns approximately 180 tons / hr of coal per 500 MW, and supplies approximately 37 tons of coal to the boiler per diffuser. A 500 MW coal-fired thermal power plant will have approximately six 500-ton capacity coal reservoirs, five of which will be supplied with normal coal, and the other will have a reserve coal reserve It is operated with low-fidelity.

Moreover, in the coal-fired thermal power plant, the standard thermal power design standard for coal is 6,080 Kcal / Kg, designed to use low-moisture bituminous coal of less than 10%. Some coal-fired power plants use imported coal, some of which have an average moisture content of at least 17%, which reduces the combustion efficiency of the boiler. If the calorific value of the coal used as the standard thermal power combustion limit is 5,400 Kcal / Kg is low, it is expected that the power generation will decrease and the fuel consumption will increase due to the decrease of combustion efficiency. In addition, when the coarse coal with a low calorific value of high water content is used, the water content is higher than the design standard and the conveying system for conveying the coal is not smooth, and when the coal is pulverized by the differentiator, the efficiency is lowered, , It may happen that the heat distribution generated in the boiler is operated with drift and abnormal condition. However, in order to reduce fuel costs in thermal power plants, the proportion of sub-bituminous coal is gradually increasing to about 41 ~ 60%.

In addition, with the expectation of the global economic recovery and the destruction of nuclear power plants due to the Japanese earthquake, the demand for coal-fired power plants is expected to rise steadily as the demand for thermal power plants increases. The global coal market is changing from the consumer to the supplier, and it is difficult to supply and supply stable coal. Production of high calorific coal is expected to remain at the current level, which is unbalanced supply and demand.

Among the total coal reserves of the world coal, the low calorific value is about 47%, but the calorific value is low and the water content is high, so the low calorific value burning of high water such as combustion trouble at the time of combustion is difficult to completely ignite in the market. Until now, there has been a high tendency to rely on stable oil prices and low production costs of nuclear power generation worldwide, but there are many plans for the construction of coal-fired thermal power plants due to the rapid rise in oil prices and anxiety about nuclear power generation .

Conventionally, the technique of drying coal (thermal drying) is a rotary drying method in which coal particles in the inside are dried with a high temperature gas while rotating a shell of a cylinder into which coal is charged, and a rotary drying method in which coal is dried from a high temperature (Flash, Pneumatic) drying method in which the gas is raised from the bottom to the top, and a fluid-bed drying method in which the high-temperature drying gas rises to the top with fine particles to dry the coal.

Coal is divided into surface moisture attached to the pores between the coal particles and bonded water which is bound to the pores inside the coal. The surface moisture occupies most of the water sprayed during the washing process, transportation and storage in the mountain, and its amount is determined by the surface area and the water absorption. The smaller the particle size, the larger the surface area and the capillary between particles and particles is formed. And the water content becomes larger. The combined moisture is formed in coal-fired generators, which are lignite, bituminous coal (bituminous coal, bituminous coal), and anthracite. If the coal has a lot of water, the calorific value is lowered and the transportation cost is increased, so it is necessary to control the water in the process of mixing, grinding and separating the coal.

Furthermore, since the pulverized coal is conveyed through a multi-stage dryer, that is, a conveyor having a plurality of through-holes formed therein for passing the reheat steam, or coal conveyed through a plurality of conveying plates while spraying high- There is a problem in that the water contained in the coal can not be effectively dried even if the reheated steam is sprayed in a state where it is not evenly dispersed. As a result, the number and length of the dryer for drying the coal have to be increased, and the amount of the reheated steam for drying has been increased, thereby increasing the cost and time for drying the coal.

As a prior art related to the present invention, Patent Document 1 discloses a method for improving the drying efficiency of a primary coal, which is primarily dried in a low-grade coal stabilizer, by using a wave-type vibration for uniform mixing with a heavy oil powder And a flow plate is provided. The vibration plate allows the low-grade coal and the heavy oil powder to be mixed evenly. The drying steam for drying the coal can not be uniformly sprayed on the surface of the coal, thereby reducing the drying efficiency.

Korean Patent Registration No. 10-0960793 (Jun. 3, 2010, Announcement, High-grade method and apparatus for lower coal)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a coal drying apparatus for drying coal used as a fuel of a thermal power plant with a reheat steam while conveying the coal to a dryer, And to effectively dry the coal by reheating steam injected into the coal.

Another object of the present invention is to improve the combustion efficiency of a thermal power plant boiler by increasing the heating value of coal by making it possible to maintain an appropriate moisture content of coal by effectively drying coal, thereby reducing fuel consumption.

It is another object of the present invention to provide a drying technology and a technology applicable to a thermal power plant that can prevent environmental problems due to incomplete combustion of coal by controlling moisture contained in coal.

In order to achieve the above object, the present invention is characterized in that a pair of first driving sprockets and a pair of first driven sprockets are separated from each other by a predetermined distance and are respectively fastened to first chains, A pair of first guide rails horizontally supporting the first transfer plate are provided under the upper second chain connected between the first drive sprocket and the first driven sprocket, A pair of second guide rails for horizontally supporting the first conveying plate are provided below the lower first chain connected between the first driven sprockets and a pair of first guide rails for horizontally supporting the first conveying plate, A second steam chamber for spraying reheat steam supplied from a reheater is installed under the lower first chain, and a first exhaust gas chamber for collecting exhaust gas is installed on the upper first chain, And, a first and a second coal drier off-gas chamber for collecting exhaust gas on the lower side chain installed first; And a pair of second drive sprockets and a pair of second driven sprockets are separated from each other by a predetermined distance and connected to second chains, a plurality of second transfer plates are hingedly coupled between the second chains, A pair of third guide rails horizontally supporting the second transfer plate are provided below the upper second chain connected between the drive sprocket and the second driven sprocket, A pair of fourth guide rails for horizontally supporting the second transfer plate are provided under the chain, a third vapor chamber for spraying the reheated steam supplied from the reheater is installed below the upper second chain, A third exhaust chamber for collecting exhaust gas is provided on the upper second chain, and a third exhaust chamber for collecting the exhaust gas is installed on the upper second chain, And a second coal dryer installed with a fourth exhaust gas chamber for collecting the coal, wherein the first coal dryer dries the first coal to a second coal dryer, and the second coal dryer dries the second coal dryer, 1 < / RTI > transfer plate and a second transfer plate; A spiral protrusion formed on the front face of the body to divide the center of the coal pile charged on the surface of the first conveyance plate and the second conveyance plate in the coal quantity feeder, And an upper end of a first guide rail horizontally supporting the first transfer plate, an upper end of a second guide rail, an upper end of a third guide rail horizontally supporting the second transfer plate, and an upper end of a fourth guide rail, And a pair of fixing members fixedly supporting the first transfer plate and the second transfer plate. The pile of coal transferred from the surface facing the upper side of the first transfer plate and the second transfer plate is flattened to a predetermined height and passes through the first transfer plate and the second transfer plate Characterized in that the conveyed coal planer is provided in a coal drying apparatus in which the reheated steam to be sprayed is evenly brought into contact with the surface of the coal particles.

Also, in the present invention, a body formed with a protrusion on the front side of the first exhaust gas chamber, the second exhaust gas chamber, the third exhaust gas chamber, and the fourth exhaust gas chamber may be fixedly installed.

Also, in the present invention, the bottom surface of the body may be inclined at a predetermined slope such that the thickness of the body becomes thicker from the edge of the blade protrusion toward the back surface of the body.

Also, in the present invention, a plurality of wedges may protrude from the bottom surface of the body at regular intervals.

In addition, in the present invention, the bottom surface of the body may be inclined at an inclined slope that becomes thicker from the tip of the blade protrusion toward the back of the body, and a plurality of wedges may be formed at a predetermined interval on the bottom surface of the body.

Further, in the present invention, the body right and left front faces may be formed to be inclined at a predetermined angle toward the left and right sides from the protrusion.

According to the present invention, the conveyed coal planer in the coal drying apparatus is a high-temperature reheating steam injected through a plurality of through holes in the conveying plate while conveying a coal pile on a plurality of conveying plates for conveying coal, The coal pellets are evenly dispersed and planarized in order to effectively dry the coal pellets so that the high-temperature reheated steam is easily contacted to the coal particles, thereby preventing the incomplete combustion of the coal by removing water remaining inside and outside the coal used as the fuel for the thermal power plant It is possible to improve the stability of the coal supply by improving the calorific value of the coal, minimizing the emission of pollutants, reducing the spontaneous ignition rate due to the decrease of the water content of the coal, and increasing the utilization of the low grade coal. In addition, it is possible to use low-calorific charcoal, which is cheaper in price than high-calorie coal, reduce fuel cost and cost due to reduction of coal import quantity, and reduce coal consumption relatively, thereby reducing waste and pollutant discharge And carbon dioxide can be reduced, and the effect of substitution of foreign technology and overseas export of facilities can be expected.

1 is a block diagram showing a coal drying apparatus according to the present invention.
2 is a view showing the front view of the coal drying apparatus according to the present invention.
3 is a schematic view showing a side view of a coal drying apparatus according to the present invention.
FIG. 4 and FIG. 5 are perspective views showing major parts in which a conveyed coal flattener is installed in a coal drying apparatus according to the present invention.
FIG. 6 is a perspective view showing a planarizer of a coal coal in a coal drying apparatus according to an embodiment of the present invention. FIG.
7 is a side view illustrating the operation of the transported coal planarizer according to the present invention.
FIG. 8 is a plan view showing the operation of the transported coal planer according to the present invention.
9A and 9B are a front view and a rear view showing the operation of the conveyed coal flattener according to the present invention.
10 is a perspective view of a planarizer of a coal coal in a coal drying apparatus according to another embodiment of the present invention.
11 is a side view of Fig.
FIG. 12 is a perspective view showing a conveyed coal planer in a coal drying apparatus according to another embodiment of the present invention.
13 is a side view of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a transported coal planer in a coal drying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, coal is uniformly dispersed in the conveying device when the coal is conveyed while being conveyed by using a conveying device such as a conveyor or a conveying plate to enhance the drying effect. In addition, the conveying planarizer is installed in a coal drying apparatus for drying coal by injecting high temperature reheating steam while coal is fed into a conveying device of a coal drying device in a coal quantity feeder for feeding a predetermined amount of pulverized coal .

In FIG. 1, the low-lean burn 200 is a place for storing and storing coal for use as a boiler fuel for a thermal power plant. Coal contains surface moisture and internal moisture. Furthermore, the coal stored in the low-leaner (200) is sprayed with water periodically to prevent scattering of coal dust. The coal stored in the low-carbon plant 200 is transferred to the coal drying apparatus 100 through a conveying system or the like. At this time, coal of low-leaner (200) whose moisture has not been removed may be transferred to a drying coal supply tank (300) connected to the coal drying apparatus. The coal stored in the coal supply tank 300 is supplied to the coal drying apparatus 100 by a predetermined amount in the coal quantity feeder 400. The coal drying apparatus 100 includes a first coal dryer 110 and a third coal dryer 170 for naturally drying coal discharged through the second coal dryer 140. The first coal dryer 110 and the second coal dryer 140 have substantially the same structure. The naturally dried coal passing through the third coal dryer (170) is stored in the dry coal storage tank (600) and supplied to the boiler fuel of the thermal power plant (700).

2 and 3, there is shown an example of a coal drying apparatus 100 in which a conveyed coal flattening machine 1 according to the present invention is installed. The coal drying apparatus 100 includes a coal loader 400 and a coal dryer 140. The coal dryer 100 includes a multi-stage dryer such as a first coal dryer 110, a second coal dryer 140 for secondarily drying coal dried in the first coal dryer, And a third coal dryer 170 for naturally drying the coal dried in the second coal dryer and supplying the dried coal to the dry coal storage tank 600.

The first coal dryer 110 includes a pair of first drive sprockets 111 and a pair of first driven sprockets 112 spaced apart from each other by a predetermined distance and fastened to the first chains 113, A plurality of first transfer plates 114 are hingedly coupled between the first drive sprocket 111 and the first driven sprocket 112 and a first conveying plate 114 is hinged between the first drive sprocket 111 and the first driven sprocket 112, A pair of first guide rails 115 for horizontally supporting the plate 114 and a lower first chain 113 connected between the first drive sprocket 111 and the first driven sprocket 112 A pair of second guide rails 116 for horizontally supporting the first transfer plate 114 are installed and a first steam injecting reheated steam supplied from the reheater 500 below the upper first chain 113, A second vapor chamber 123 for spraying the reheat steam supplied from the reheater 500 is installed under the lower first chain 113, The side, and the first off-gas chamber (124) installed for collecting the exhaust gas over a first chain 113, the second off-gas chamber 126 for collecting the exhaust gas over the lower first chain 113 is installed.

The second coal dryer 140 includes a pair of second drive sprockets 141 and a pair of second driven sprockets 142 spaced apart from each other by a predetermined distance and connected to the second chains 143, A plurality of second transfer plates 144 are hingedly coupled between the chains 143 and an upper second chain 143 connected between the second drive sprocket 141 and the second driven sprocket 142, A pair of third guide rails 145 for horizontally supporting the transfer plate 144 are provided and under the lower second chain 143 connected between the second drive sprocket 141 and the second driven sprocket 142, A pair of fourth guide rails 146 for horizontally supporting the second transfer plate 144 and a third guide rail 146 for spraying the reheated steam supplied from the reheater 500 below the upper second chain 143, A vapor chamber 150 is installed and a fourth vapor chamber 153 for spraying the reheated steam supplied from the reheater 500 is installed below the lower second chain 143 A third exhaust gas chamber 154 for collecting exhaust gas is provided on the upper second chain 143 and a fourth exhaust gas chamber 156 for collecting exhaust gas on the lower second chain 143.

Therefore, the transported coal flattening machine 1 of the present invention is provided with the first exhaust gas chamber 124 and the second exhaust gas chamber 126 of the first coal dryer 110 and the third exhaust gas chamber 126 of the second coal dryer 140 154 and the fourth exhaust gas chamber 156, respectively.

4, the transferred coal planarizer 1 is disposed above the upper surface of the plurality of first transfer plates 114 of the first coal dryer 110, that is, the front end of the first exhaust gas chamber 124, And is installed at an upper portion of the surface facing the upper side of the plurality of second transfer plates 144 of the dryer 140, that is, in front of the third exhaust gas chamber 154 at regular intervals. Further, both ends of the body 2 of the transporting coal flattening machine 1 are fixed to the upper ends of the first guide rails 115 horizontally supporting the first transport plate 114 and the third guides And are fixedly supported by a pair of fixing members 5 on the upper end of the rails 145, respectively.

5, the transported coal flattening machine 1 is disposed above the surface of the first coal dryer 110 facing the upper side of the plurality of first transfer plates 114, that is, the front end of the second exhaust gas chamber 126, 2 coal dryers 140, that is, in front of the fourth exhaust gas chambers 156 at predetermined intervals. The opposite ends of the body 2 of the transporting coal flattening machine 1 are fixed to the upper ends of the second guide rails 116 horizontally supporting the first transport plate 114 and the upper ends of the fourth guide rails 146 respectively Is fixedly supported by the member (5).

Accordingly, two of the transferred coal planer 1 are installed in the first coal dryer 110 and two are installed in the second coal dryer 140. This is because the first coal dust collecting chamber 110 and the second coal dust collecting chamber 110 are disposed at the front side of the first exhaust gas chamber 124 into which the coal is introduced into the upper surface of the first coal dryer 110, The front end of the second exhaust gas chamber 126 in which the coal is dropped from the upper first transfer plate 114 of the first coal feeder plate 114 to the upper surface of the lower first feed plate 114, The front end of the third exhaust gas chamber 154 in which the coal is dropped to the surface facing the upper side of the upper second transfer plate 144 of the second coal dryer 140 in the transfer plate 114 and the front end of the second coal dryer 140 The coal pile is installed in front of the fourth exhaust gas chamber 156 where the coal is dropped to the surface facing the upper side of the lower second transfer plate 144 from the upper second transfer plate 144 and dispersed and planarized The first transfer plate 114 and the second transfer plate 144, To allow vapor to more effectively dry the coal by the coal particles to be evenly in contact with the surface.

A plurality of through holes 114a are formed in the first transfer plate 114 so that the reheated steam injected from the first and second vapor chambers 120 and 123 passes through the first transfer plate 114 and comes into contact with the coal particles, . Guard 114b of a predetermined height is provided at left and right sides of the top surface of the first transfer plate 114 so that the charged coal pile does not flow down to the left or right of the first transfer plate 114. [ The guard 114b has a substantially trapezoidal shape and a shape with a wide upper side and a narrow lower side. Therefore, the guards 114b of the first transfer plate 114 are overlapped with the guards 114b adjacent to each other. At this time, it is preferable that the guard 114b of the first transfer plate 114 is installed in a substantially zigzag direction with the guard 114b adjacent to each other. The reheat steam injected from the first and second steam chambers 120 and 123 is supplied to the left and right sides of the bottom surface of the first transfer plate 114 in the first and second steam chambers 120 and 123 The shielding plate 114c is installed so as not to be lost.

The second transfer plate 144 is provided with a plurality of through holes 144 for allowing the reheated steam injected from the third and fourth steam chambers 150 and 153 to pass through the second transfer plate 144, 144a are formed. A guard 144b having a predetermined height is provided on the left and right sides of the upper surface of the second transfer plate 144 so as to prevent the charged coal pile from flowing down to the left or right of the second transfer plate 144. The guard 144b has a substantially trapezoidal shape and an upper light-narrow narrow shape with a narrow lower portion. Therefore, the guards 144b of the second transfer plate 144 are overlapped with the guards 144b adjacent to each other. At this time, it is preferable that the guard 144b of the second transfer plate 144 is provided in a substantially zigzag direction with the guard 144b adjacent to each other. The reheat steam injected from the third steam chamber 150 and the fourth steam chamber 153 is supplied to the left and right sides of the lower end surface of the second transfer plate 144 by the third steam chamber 150 and the fourth steam chamber 153 And the shielding plate 144c is installed so as not to be lost.

In Fig. 6, the transported coal flattening machine 1 comprises a columnar body 2. The body 2 may be formed of a polygonal or elliptic shape having a surface capable of uniformly dispersing coal on the transfer device. At the central portion of the front surface of the body 2, a pellet projection 3 for dividing the center of the pile of coal fed into the conveying device from the coal quantity feeder is dispersed. The projections 3 are formed in a substantially triangular prism shape so as to form edges having a line of intersection in front of the body 2. Therefore, when the pile of coal is brought into contact with the puddle 3, the coal particles are divided into left and right sides by the puddle 3. When the coal is fed onto the conveying device, the coal is accumulated in a substantially circular arc shape. Therefore, the pile of coal accumulated in the arc shape has a higher density at the center portion and a lower density toward the front and rear and left and right. Therefore, the puddle (3) functions to disperse the center of the coal pile while grasping it from side to side.

The body 2 formed with the projections 3 is provided with a pair of fixing members fixed to one side of the transfer device so that both side ends of the body are fixedly supported. Furthermore, the transported coal flattening machine 1 is installed at an interval above the transporting unit. The conveying planer 1 flattens the coal pile delivered from the conveying device to a predetermined height so that the reheated steam passing through the conveying device is uniformly brought into contact with the surface of the coal particles.

7 and 8, the coal C injected onto the first conveying plate 114 and the second conveying plate 144 is dispersed to the left and right sides after passing through the projecting projections 3 of the conveying coal planer 1 Flattened while passing through the bottom surface of the flat body 2.

9A, coal (C) charged or dropped onto the first transfer plate (114) and the second transfer plate (144) is piled up in a substantially arc shape. At this time, the density of the center portion of the coal (C) accumulated in the arc shape becomes higher, and the density becomes lower toward the front, rear and left and right. Therefore, when the transferred coal (C) comes into contact with the granules (3), the central portion of the coal (C) is divided into left and right sides to disperse the coal particles. In FIG. 9B, the coal C thus dispersed is flatly arranged on the upper surface of the first conveying plate 114 and the second conveying plate 144 while passing through the conveying coal planer 1.

10 and 11, a plurality of wedges 4 are protruded from the bottom surface of the body 2 at predetermined intervals in the planarizer 1 of the transported coal. That is, the coal (C) is dispersed to the right and left while passing through the spikes (3) of the conveyed coal planer (1), and then disperses the density of the coal (C) through the wedge (4) protruding from the bottom of the body So that more uniform planarization can be achieved.

12 and 13, the bottom surface of the body 2 of the transported coal flattening machine 1 is thicker from the blade edge of the projecting projections 3 toward the back surface of the body 2 Is formed of a sloped surface (6) of an inclined shape at a constant slope. That is, the coal C is dispersed to the right and left while passing through the sprocket 3 of the conveying coal planer 1 and then passes through the sprockets 3 and the inclined plane 6 inclined at a predetermined angle to the bottom of the body 2 The density of the coal (C) is dispersed so as to maintain a constant leveling.

In the present invention, the bottom surface of the body 2 is inclined at a predetermined inclination at which the thickness becomes thicker toward the back surface of the body 2 from the blade edge of the projecting projection 3, A plurality of wedges 4 may be formed to protrude at intervals.

As described above, the transferred coal planarizer in the coal drying apparatus of the present invention is a high-temperature reheating steam injected through a plurality of through holes in a conveying plate while conveying a coal pile on a plurality of conveying plates for conveying coal, So that the pile of coal can be evenly dispersed and planarized to allow the coal particles to easily contact the high-temperature reheated steam.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

The present invention relates to a coal drying apparatus and a method of manufacturing the coal drying apparatus. The coal drying apparatus includes a first coal dryer and a second coal dryer. A guide rail 117 and a guide bar 118. The guide bars 118 and 148 are provided with guide bars 114a and 114b and guide bars 114a and 114b. And a gas discharge pipe 130. The gas discharge pipe 130 is connected to the discharge port 131 and the discharge port 131 is connected to the discharge port 131, 140: Second coal dryer 170: Third coal dryer 200: Fossil fuel 300: Dry coal supply tank 400: Coal quantity feeder 500: Reheater 600: Dry coal storage tank 700: Thermal power plant C: Coal

Claims (5)

A pair of first drive sprockets and a pair of first driven sprockets are spaced apart from each other by a predetermined distance and fastened to the first chains, a plurality of first transfer plates are hingedly coupled between the first chains, A pair of first guide rails for horizontally supporting the first transfer plate are provided below an upper second chain connected between the sprocket and the first driven sprocket, and a pair of first guide rails for horizontally supporting the lower first chain A pair of second guide rails horizontally supporting the first transfer plate are provided below the first transfer chamber, a first vapor chamber for spraying the reheated steam supplied from the reheater is provided below the upper first chain, A first exhaust chamber for collecting exhaust gas is provided on the upper first chain, and a second exhaust chamber for collecting the exhaust gas is installed on the lower first chain, A first coal dryer in the second off-gas chamber of the house are installed; And
A pair of second drive sprockets and a pair of second driven sprockets are spaced apart from each other by a predetermined distance and connected to the second chains, a plurality of second transfer plates are hingedly coupled between the second chains, A pair of third guide rails horizontally supporting the second transfer plate are provided below the upper second chain connected between the sprocket and the second driven sprocket and the lower second chain connected between the second drive sprocket and the second driven sprocket A pair of fourth guide rails for horizontally supporting the second conveying plate are provided below and a third steam chamber for injecting the reheated steam supplied from the reheater is provided below the upper second chain, A third exhaust chamber for collecting exhaust gas is provided on the upper second chain, and a third exhaust chamber for collecting the exhaust gas is provided on the upper second chain. A fourth and a second coal dryer in the exhaust gas chamber, which is installed,
Wherein the first coal dryer in the first coal dryer is charged with a second coal dryer to be secondarily dried,
A columnar body provided at a predetermined interval above the upper surface of the first transfer plate and the second transfer plate;
A spiral protrusion formed on the front face of the body to divide the center of the coal pile charged on the surface of the first conveyance plate and the second conveyance plate in the coal quantity feeder, And
A first guide rail upper and a second guide rail upper end horizontally supporting the first transfer plate, an upper end of a third guide rail horizontally supporting the second transfer plate and an upper end of a fourth guide rail, And a pair of fixing members for supporting the fixing member,
The pile of coal transferred from the upper surface of the first transfer plate and the second transfer plate is planarized at a predetermined height so that the reheated steam injected through the first transfer plate and the second transfer plate is evenly contacted to the surface of the coal particles. Transfer planarizer for coal in coal dryers.
The conveyor planarizer as set forth in claim 1, wherein a body is provided with a protrusion formed on the first exhaust chamber, the second exhaust chamber, the third exhaust chamber, and the fourth exhaust chamber.
The conveyor planarizer as set forth in claim 1, wherein the bottom surface of the body is inclined at a predetermined slope such that the thickness of the bottom surface increases from the edge of the blade to the back surface of the body.
The conveyor planarizer according to claim 1, wherein a plurality of wedges are protruded at regular intervals on the bottom surface of the body.
The coal drying apparatus according to claim 1, wherein the body bottom surface is formed with a sloped inclined surface at a predetermined slope such that the thickness of the body bottom surface increases from the blade tip toward the back surface of the body, and a plurality of wedges protrude from the body bottom surface at regular intervals Transfer planarizer of coal.

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