KR101524564B1 - Apparatus for Dispersion Supply and Dust-Reduction of Input Coal in System for Drying Coal - Google Patents

Abstract

The present invention relates to a coal supply device for reducing coal dust supplied for drying in a coal drying apparatus, and for dispersing supply and, more specifically, to a coal supply device, which prevents dust while supplying coal dispersed to a transporting device, when coal is poured into a multistage dryer from a coal quantitative supply device through a pulverizing mill, thereby minimizing contamination of a coal drying apparatus by dust and discharge of pollutant and solving environmental problems. The device comprises: a dust reduction device comprising an entrance pipe combined with a discharge hole of a coal quantitative supply device, a worm wheel, a worm, a curved pipe, and an exit pipe; and a dispersion and supply device comprising a power generator and a circular dispersing plate for receiving power to reversely and inversely rotate. The dust reduction device reduces the supply speed of coal supplied from the coal quantitative supply device, and supplying the coal to the dispersion and supply device and supplying the coal by evenly dispersing the coal to the surface toward the top of a first transport plate.

Description

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

The present invention relates to a coal supply apparatus for reducing and distributing dust of coal supplied for drying in a coal drying apparatus, and more particularly, to a coal supply apparatus for reducing coal dust supplied from a coal- The present invention relates to a coal supply apparatus for minimizing the generation of dust when a coal is supplied from a fixed amount feeder to a multi-stage dryer, and to distribute and supply coal to the transfer apparatus.

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.

Further, when the finely divided coal is supplied to the dryer for drying the coal, the coal particles are scattered and dust is generated. Dust may cause environmental pollution or cause malfunction of coal drying equipment. In addition, there has been a problem of frequent cleaning due to the maintenance of the coal drying apparatus.

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 using as a fuel of a thermal power plant, And to improve the drying function of the coal drying apparatus by supplying the coal at a predetermined ratio.

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 conveying plate are provided below the upper first chain connected between the first driving 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 the exhaust gas is provided on the upper second chain, and a third exhaust gas 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 coal, wherein the coal is dried in a second coal dryer by charging the first coal dried in the first coal dryer, A worm wheel coupled to an outer circumferential surface of the inlet pipe; and a worm wheel coupled to the worm wheel, wherein the worm wheel is engaged with the worm wheel, And a dust reducer consisting of a worm rotating with a rotational force transmitted from the motor, a bending tube having an upper end coupled to the inlet tube, and an outlet tube coupled to the bending tube end, A power generator for generating a constant movement force and a rotation shaft coupled to the upper center of the shaft, The apparatus of claim 1, further comprising a dispersing and feeding device formed of a dispersed disc of a conical shape that receives the power generated by the power generator through a rotating shaft and rotates in a regular angle at a constant angle, wherein the dust reducer rotating at the constant speed feeds the coal And the dispersion feeder uniformly distributes and supplies the coal uniformly to the surface facing the upper side of the first conveying plate by a dispersing disk rotated in a normal or constant angle at a predetermined angle, Supply and dust reduction device.

In addition, in the present invention, the power generator includes a forward / reverse motor that generates a constant forward power and a reverse reverse force, a conversion gear box that reduces the rotational force output from the forward and reverse motors and converts the rotary motion into a linear reciprocating motion, And a pinion gear coupled to the rotation shaft and engaged with the rack gear.

Also, in the present invention, the power generator may include a forward / reverse motor that generates a constant forward power and a reverse reverse force, a worm shaft-coupled to the forward and reverse motors, and a worm wheel coupled to the rotation shaft and engaged with the worm.

Also, in the present invention, the power generator may include an actuator for generating a linear reciprocating motion, a worm shaft-coupled to the actuator, and a worm wheel coupled to the worm and engaged with the worm.

Further, in the present invention, the surface of the dispersed disk may have concavities and convexities on the surface thereof with a predetermined distance in the radial direction around the rotation axis.

Further, in the present invention, a cover for preventing scattering of coal dust from the bottom of the case to the outside including the curved pipe and the dispersing feeder may be installed.

According to the present invention, a coal feeder for reducing dust and dispersing feeds in a coal dryer is provided to prevent dust from being generated during the feeding of coal onto a transfer plate for transferring coal, thereby preventing contamination or pollution of the coal dryer by dust And the coal is supplied at a predetermined ratio to the surface of the transfer plate so that the high temperature reheated steam can be easily brought into contact with the coal particles so as to remain in the coal inside and outside the coal used for the thermal power plant It is possible to prevent the incomplete combustion of coal due to the removal of moisture, to minimize the emission of pollutants, and to prevent the ignition and spontaneous combustion of coal by dust. Further, It is possible to improve the stability of the coal supply by increasing utilization. In addition, it is possible to use low-cost coal, which is less expensive than high-calorific coal, from the coal drying apparatus to which the coal supply device for reducing dust is applied, and it is possible to reduce fuel cost and cost by reducing coal import quantity, Therefore, it is possible to reduce the emission of waste and pollutants generated from the flue gas and to reduce the carbon dioxide, and it can be expected that the effect of substitution of foreign technology and the export of the equipment abroad 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 is a perspective view showing a main portion in which a charged coal dispersion supply apparatus and a dust reduction apparatus are installed in a coal drying apparatus according to the present invention.
FIGS. 5 to 7 are perspective views showing an apparatus for dispersing coal and supplying coal in a coal drying apparatus according to an embodiment of the present invention.
FIGS. 8 and 9 are side views illustrating the operation of the coal feed and dust reduction apparatus according to the present invention.
10 is a plan view showing an operating angle of the dispersion plate of the apparatus for supplying and dispersing coal to be supplied according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a coal coal dispersion supply and dust reduction apparatus in a coal drying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention minimizes the generation of dust in coal when the coal is fed into a conveying device such as a conveyor or a conveying plate, and distributes and supplies coal. In addition, the apparatus for dispersed feed and dust reduction is installed in a coal drying apparatus that feeds high-temperature reheated steam while coal is fed by feeding coal from a coal feeder feeding a predetermined amount of pulverized coal, do.

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 to 4 show an example of a coal drying apparatus 100 equipped with a dust reducer 10 for reducing dust of coal and a dispersed feeder 20 for dispersed supply of coal according to the present invention. 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 50.

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 first conveying plate 114 is hingedly coupled between the first drive sprocket 111 and the first driven sprocket 112 and a first conveying plate 114 is hingedly coupled between the first driven 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 113b 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 for spraying the reheated steam supplied from the reheater 500 below the upper first chain 113a, A chamber 120 is provided and a second vapor chamber 123 for spraying the reheated steam supplied from the reheater 500 is installed below the lower first chain 113b, The first off-gas chamber 124 for collecting the exhaust gas over the upper first chain (113a) is provided, and a 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 143a 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 143b 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 are provided and a third guide rail 146 for spraying the reheat steam supplied from the reheater 500 below the upper second chain 143a is provided, A steam chamber 150 is installed and a fourth steam chamber 153 for spraying the reheated steam supplied from the reheater 500 is installed below the lower second chain 143b It said third off-gas chamber 154 for collecting the exhaust gas over the upper second chain (143a) are installed, a fourth off-gas chamber 156 for collecting the exhaust gas over the lower second chain (143b) are provided.

The first transfer plate 114 is provided with a plurality of through holes 114a 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. Is formed. 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.

5, the dust reducer 10 is installed at the lower end of the coal quantitative feeder 400. [ The dust reducer 10 is installed at a predetermined interval from the surface of the first coal dryer 110 facing the upper side of the plurality of first transfer plates 114. Further, the dispersive feeder 20 is installed under the dust reducer 10 and across the side surface. Therefore, the coal supplied from the coal quantitative feeder 400 is dispersed by a predetermined amount in the dispersing feeder 20 which repeatedly rotates forward and reverse periodically after the dust is reduced in the dust reducer 10, ) To the surface facing upward.

Further, the dust reducer 10 is connected to the outlet pipe 401 of the coal metering feeder 400 by a bearing. And the worm wheel 14 is coupled to the outer circumferential surface of the inlet pipe 11. The worm 15 is engaged with the gear formed on the outer periphery of the worm wheel 14. [ The worm 15 is gear-engaged with the worm wheel 14 and rotates at a constant speed by the rotational force transmitted from the motor 16. The worm wheel 14 is gear-engaged with the worm 15 at a constant gear ratio, and the worm wheel 14 decelerates the rotational speed of the worm 15. The motor 16 generates a rotational force in a predetermined direction and can be rotated forward or backward. The curved tube 17 is an upper end coupled to the inlet tube 11. The curved tube 17 is curved in a predetermined direction. The tubular section 17 may have a zigzag shape or a twisted shape or a spiral shape. The curved tube 17 changes the direction of the coal C supplied from the coal quantitative feeder 400 to decelerate the feed rate of coal. Further, it is preferable that the bending or twisting of the bending tube 17 is at least twice. An outlet tube 12 is coupled to the end of the bend tube 17. The outlet pipe 12 determines the direction in which the coal C is injected onto the first transfer plate 114. It is also preferable that the inlet pipe 11 and the outlet pipe 12 are provided on substantially the same center axis.

It is also preferable that the worm wheel 14 provided on the outer periphery of the inlet pipe 11 of the dust reducer 10 and the first case 18 capable of sealing the worm 15 and the motor 16 are provided. This is to prevent the worm wheel 14, the worm 15, and the blind or malfunction of the motor 16 by the dust that may be generated when the coal C is supplied onto the surface of the first transfer plate 114. It is also preferable that the first case 18 can seal the entire portion of the dust reducer 10 except the outlet pipe 12.

Further, the dust reducer 10 slows down the rate at which the coal supplied in the coal quantitative feeder 400 is supplied to the surface facing the upper side of the first transfer plate 114 by rotating the coal supplied in a predetermined amount in a predetermined direction, thereby suppressing dust generation.

Further, the dispersed feeder 20 is installed over one side and the lower side of the dust reducer 10. The dispersed feeder 20 is installed such that the concentric dispersing disk 21 is spaced below the outlet tube 12 of the dust reducer 10 at a certain distance. The rotating shaft (23) is coupled to the center of the dispersing disk (21). It is preferable that the surface of the dispersed disk 21 be formed with projections and depressions 22 on the surface thereof with the mountains and the ribs at regular intervals in the radial direction with the rotation axis 23 as the center. The projections and depressions 22 fall on the surface of the dispersing disk 21 while the dispersing disk 21 rotates at a certain angle so that the coals injected are easily dispersed in a predetermined direction. It is preferable that the lower end of the dispersing feeder 20 is installed close to the surface of the first conveying plate 114. At this time, when the coal C supplied to the first transfer plate 114 is supplied through the space between the lower end surface of the dispersion feeder 20 and the upper end surface of the first transfer plate 114, interference occurs due to the dispersion feeder 20 .

The dispersive feeder 20 is provided with a power generator 30 that generates a certain kinetic force. The power generator 30 includes a forward / reverse motor 31 that generates constant forward power and reverse power, a conversion gear box 32 that decelerates the rotational force output from the forward / reverse motor and converts the rotary motion into a linear reciprocating motion, A rack gear 33 axially coupled to the conversion gear box and a pinion gear 34 coupled to the rotation shaft 23 and engaged with the rack gear 33. [ Thus, the periodic normal / reverse rotation of the forward and reverse motors 31 is converted into a linear reciprocating motion in the conversion gear box 32 and transmitted to the rack gear 33. The rack gear 33 rotates the meshed pinion gear 34 forward / So that the dispersion disk 21 is repeatedly rotated forward and backward at a predetermined angle by normal and reverse rotation of the rotary shaft 23.

6, the power generator 40 includes a forward / reverse motor 41 that generates a constant forward power and reverse power, a worm 42 that is shaft-coupled to the forward and reverse motors, And a worm wheel 43 coupled to the rotation shaft 23 and engaged with the worm.

7, the power generator 50 includes an actuator 51 for generating a linear reciprocating motion, a worm 52 axially coupled to the actuator, And a worm wheel 53 coupled to the worm.

Accordingly, the power generators 30, 40, and 50 may also include various configurations in which the rotating disk 23 can be rotated in both normal and reverse directions to rotate the dispersed disk 21 regularly and periodically.

It is also preferable that the power generator 30 including the forward and reverse motors 31, the conversion gear box 32, the rack gear 33 and the pinion gear 34 is installed in the second case 35. The second case 35 is formed by dust that can be scattered from the coal C discharged from the outlet pipe 12 of the dust reducer 10 and supplied to the surface of the dispersing disk 21, .

In the coal coal dispersion apparatus and the dust reduction apparatus of the present invention, the coal C is vertically discharged through gravity through the outlet 401 of the coal quantity feeder 400 in FIG. At this time, the rate at which coal (C) is dropped through the curved pipe (17) of the dust reducer (10) is reduced. That is, the coal C discharged from the discharge port 401 is supplied to the left side while striking the pipe protruding to the left from the right side of the inside of the bending pipe 17, and again collides with the pipe projecting from the left side to the right side inside the bending pipe 17 And is supplied onto the first transfer plate 114 through the outlet pipe 12 after being supplied in the rightward direction. The coal C is supplied through the outlet pipe 12 after decreasing the speed while changing the direction of the coal C in accordance with the number of bending or twisting of the bending tube 17.

The dust reducer 10 rotates the worm wheel 14 by the rotational force of the worm 15 coupled to the rotation shaft of the motor 16 to rotate the inlet tube 11 on which the worm wheel 14 is mounted. The rotation of the inlet tube 11 rotates the tube 17 and the outlet tube 12. The coal C passing through the dust reducer 10 is supplied to the first conveying unit 12 by providing the supply of the coal C which is further decelerated by the influence of the bent or twisted curved tube 17 and the rotational force of the curved tube 17. [ The speed of the coal C supplied onto the surface of the plate 114 is reduced to minimize the generation of dust.

The dispersed feeder 20 rotates the dispersion disk 21 coupled to the rotary shaft 23 by the power generated by the power generator 30 to rotate the coal D in the dust reducer 10 to the first And evenly distributed over the surface of the transfer plate 114. That is, the rotary motion of the forward / reverse motor 31 is converted into a linear reciprocating motion through the conversion gear box 32, and the rack gear 33 by the linear reciprocating motion is engaged with the pinion gear 34 Thereby rotating the dispersion disk 21 coupled to the rotating shaft 23 at a predetermined angle.

At this time, it is preferable that the angle of rotation of the dispersion disc 21 in the normal and reverse directions is not deviated by more than 45 degrees from the center in the left-right direction in Fig. Therefore, the rotation angle of the forward and reverse motors 31 and the length or rotation angle of the gear box 32 or the rack gear 33 and the pinion gear 34 should be adjusted. Also, the rotational speed of the forward and reverse motors 31 for the forward and reverse rotations must be constantly adjusted.

The concave and convex portions 22 are formed on the surface of the dispersed disk 21 so that the coal C discharged from the outlet pipe 12 of the dust reducer 10 can be uniformly dispersed on the surface of the first transfer plate 114 And the coal C deviating from the surface of the first transfer plate 114 by the centrifugal force of the dispersed disk 21 can be protruded by the guard 114b coupled to the first chains 113 It is good. The lower edge of the dispersing disk 21 is positioned between the guards 114b coupled to the first chains 113 and positioned at a distance from the surface of the first conveying plate 114, It is better to be positioned lower. This is to prevent the coal C from being carried over the guard 114b.

Accordingly, the present invention further reduces the dust that can be generated by the coal (C) directly supplied from the dust reducer (10) to the surface of the first transfer plate (114) by the dispersing disk (21) The coal C can be dispersed evenly on the first conveying plate 114 by the normal rotation of the dispersing disk 21.

9, a cover 36 for preventing scattering of coal dust from the bottom surface of the first case 18 to the outside including the curved pipe 17 and the dispersed feeder 20 may be provided. It is possible to prevent scattering of dust scattered in the coal C that is introduced into the surface of the first conveyance plate 114 by the cover 36 and to reduce the noise due to the operation of the dust reducer 10 and the dispersing / have.

Accordingly, the coal coal dispersion and dust reduction apparatus in the coal drying apparatus can reduce the speed of the coal (C) supplied from the coal quantity feeder (400) after the dust reducer (10) The coal C is uniformly dispersed on the surface of the first conveying plate 114 so as to be uniformly distributed on the surface of the first conveying plate 114 so as to minimize the generation of dust from the coal to be supplied, It is possible to prevent the pollution by the dust and to prevent the waste of the coal drying device and the malfunction of the coal drying device while preventing the coal from being scattered during the drying process of the coal in the coal drying device, .

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 worm wheel, and more particularly, to a worm wheel having a worm wheel and a worm wheel. The first coal dryer 111 and the second coal dryer 141 are connected to each other through the first and second coal dryers 111 and 141, respectively. The drive sprocket 112 and the follower sprockets 113 and 113a and 113b and 143a and 143b and the chains 114 and 144 and the feed plate 114a and 144a and the through holes 114b and 144b are guards 114c and 144c, And the exhaust gas is supplied to the exhaust gas chambers 125 and 155 through the guide rails 117 and 157. The guide rails 117 and 157 are connected to the guide bars 118 and 148, respectively. Driving motors 119 and 149, speed reducers 120 and 123, 150 and 153, and steam chambers 121 and 151, respectively. : Gas discharge pipe 130, 160: input port 131, 161: discharge port 140: second coal dryer 170: third coal dryer 200: low-firing 300: drying Coal supply tank 400: coal quantity feeder 500: reheating 600: dry coal storage tank 700: thermal power plant C: coal

Claims (6)

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 the upper first 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 the exhaust gas is provided on the upper second chain, and a flue gas is disposed on the lower second chain, and a fourth exhaust chamber for exhausting the reheated steam supplied from the reheater is installed under the chain. A second coal dryer the fourth off-gas chamber that is installed at home, and
Wherein the first coal dryer in the first coal dryer is charged with a second coal dryer to be secondarily dried,
And a coal quantitative feeder for supplying a predetermined amount of coal to a surface facing upward of the first transfer plate,
A worm wheel coupled to the outer circumferential surface of the inlet pipe, a worm rotatably connected to the worm wheel and rotated by a rotational force transmitted from the motor, and an upper end coupled to the inlet pipe, And a dust reducer comprising a bend and an outlet tube coupled to said bend end,
A power generator installed on one side and a lower portion of the dust reducer, the power generator being connected to a power shaft of the power generator on a rotating shaft coupled to an upper portion of the power generator, Further comprising a dispersing feeder made of a dispersed disc of a conical shape that is received and rotated forward and backward at an angle,
The dust reducer rotating at the constant speed reduces the speed of coal supplied from the coal quantitative feeder and then supplies the pulverized coal to the dispersing feeder, An apparatus for dispersing coal feed and reducing dust in a coal drying apparatus for uniformly distributing coal to a surface.
The power generator according to claim 1, wherein the power generator includes: a forward / reverse motor that generates a constant forward power and a reverse power; a conversion gear box that converts the rotary motion output from the forward and reverse motors into a linear reciprocating motion; And a pinion gear coupled to the rotating shaft and meshing with the rack gear.
2. The coal drying apparatus according to claim 1, wherein the power generator includes: a forward / reverse motor that generates a constant forward power and reverse power; a worm shaft coupled to the forward and reverse motors; and a worm wheel coupled to the rotating shaft, The coal feed and the dust reduction device.
[Claim 2] The method according to claim 1, wherein the power generator includes an actuator for generating a linear reciprocating motion, a worm shaft axially coupled to the actuator, and a worm wheel coupled to the rotating shaft to engage with the worm, Dust reduction device.
The apparatus as set forth in claim 1, wherein the dispersed disk has a surface with irregularities in the form of a mountain and a valley at regular intervals in a radial direction around the rotating shaft.
The apparatus of claim 1, wherein a cover is provided to prevent scattering of coal dust to the outside including the curved tube and the dispersed feeder.

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