KR101497567B1 - Apparatus for Support Injection Pressure of Chamber for Supply Reheat Steam in System for Drying Coal - Google Patents

Apparatus for Support Injection Pressure of Chamber for Supply Reheat Steam in System for Drying Coal Download PDF

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Publication number
KR101497567B1
KR101497567B1 KR20140073216A KR20140073216A KR101497567B1 KR 101497567 B1 KR101497567 B1 KR 101497567B1 KR 20140073216 A KR20140073216 A KR 20140073216A KR 20140073216 A KR20140073216 A KR 20140073216A KR 101497567 B1 KR101497567 B1 KR 101497567B1
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South Korea
Prior art keywords
steam
chamber
coal
vapor
chain
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KR20140073216A
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Korean (ko)
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김성곤
김용빈
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주식회사 한국테크놀로지
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Priority to KR20140073216A priority Critical patent/KR101497567B1/en
Application granted granted Critical
Publication of KR101497567B1 publication Critical patent/KR101497567B1/en
Priority to PCT/KR2015/006142 priority patent/WO2015194858A1/en
Priority to RU2017101198A priority patent/RU2017101198A/en
Priority to CN201580031977.2A priority patent/CN106574820A/en
Priority to AU2015278422A priority patent/AU2015278422B2/en
Priority to CA2952215A priority patent/CA2952215A1/en
Priority to US15/320,137 priority patent/US20170130152A1/en
Priority to PH12016502493A priority patent/PH12016502493A1/en

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/005—Drying-steam generating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/14—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the materials or objects to be dried being moved by gravity

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

[0001] The present invention relates to a jet pressure maintaining apparatus for reheating steam supply chambers for improving the drying efficiency at a constant jet pressure of reheating steam to coal fed into a conveying device in a multi-stage dryer for drying coal using reheat steam , A pair of first driving 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 second chain connected between the drive sprocket and the first driven sprocket, A pair of second guide rails horizontally supporting the first transfer plate are provided under the chain, and the reheat steam supplied from the reheater below the upper first chain A second vapor chamber for spraying the reheated steam supplied from the reheater is installed under the lower first chain, and a first exhaust chamber for collecting the exhaust gas is disposed on the upper first chain A first coal dryer provided with a second exhaust gas chamber for collecting exhaust gas on the lower first chain; 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 is charged with the first coal dried by the second coal dryer, And a steam supply pipe for supplying reheated steam generated in reheating is connected to one side of the chamber, the second steam chamber, the third steam chamber and the fourth steam chamber, and the first steam chamber, the second steam chamber, And a first steam distribution perforated plate having a plurality of first steam injection holes formed in an upper portion inside the fourth steam chamber are installed to spray reheat steam of a uniform pressure through the first steam injection hole, The first supporting member is fixed to a first fixing member provided on a bottom surface of a first vapor distribution pier provided in each of the first to fourth steam chambers, In the fixing member 2 supporting member is fixed, a first elastic support body having an elastic body having an elastic force of a certain magnitude is coupled between the first and second support members, and the first elastic support body supports the first vapor distribution perforated plate And a first space portion is formed between the first and second steam chambers to the fourth steam chamber, and the first vapor distribution pier may be raised by the vapor pressure introduced into the first space portion, So that the steam is kept constant through the injection hole. In the present invention, in a multi-stage coal dryer, high-temperature reheated steam is sprayed to the surface and inside of the coal at a uniform spray pressure, thereby preventing the incomplete combustion of coal by removing water remaining on the surface and inside of coal, It improves the calorific value of coal and minimizes emission of pollutants, improves the corrosion prevention and durability of the system, reduces the spontaneous ignition rate due to water reduction, improves the pulverization efficiency of the coal differentiator and the thermal distribution of the boiler , It is possible to solve the problem of clogging of moving passage at the time of transferring coal and to improve the stability of coal supply by increasing utilization of low grade coal which is in low demand.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] This invention relates to an apparatus for maintaining a jet pressure in a reheat steam supply chamber in a coal drying apparatus,

The present invention relates to an apparatus for drying coal using reheat steam, and more particularly, to a system for drying coal using a reheat steam, and more particularly, And more particularly to a jet pressure maintaining apparatus for a reheat steam supply chamber for improving drying efficiency.

Generally, a coal-fired thermal power plant burns about 180 tons of coal per 500 MW, and supplies about 37 tons of coal to a 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.

Further, in an apparatus for drying coal by spraying high-temperature reheating steam under a dryer while conveying the pulverized coal through a multi-stage dryer, that is, a conveyor having a plurality of through holes formed therein for passing the reheat steam or a plurality of conveyor plates, There is a problem that the reheated steam is not sprayed at uniform pressure on the coal put on the plate, so that the moisture contained in the coal can not be effectively dried. 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 steam superheating apparatus in which a steam conveyor belt for conveying coal in a duct of a superheated steam drying apparatus is installed, an overheated steam supply pipe is connected to the duct, and superheated steam Is sprayed. However, there has been a problem that the superheated steam is sprayed only on the surface of the coal charged on the steam conveyor belt, or the superheated steam is not effectively sprayed to the coal particles or pores in the areas where the coal is solid or dense, thereby lowering the drying efficiency.

Korean Registered Patent No. 10-1216827 (December 28, 2012, Announcement, Coal Drying System Using Superheated Steam)

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 to be used as a fuel of a thermal power plant by reheating steam while conveying the coal to a dryer, To thereby effectively dry 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 is charged with the first coal dried by the second coal dryer, And a steam supply pipe for supplying reheated steam generated in reheating is connected to one side of the chamber, the second steam chamber, the third steam chamber and the fourth steam chamber, and the first steam chamber, the second steam chamber, And a first steam distribution perforated plate having a plurality of first steam injection holes formed in an upper portion inside the fourth steam chamber are installed to spray reheat steam of a uniform pressure through the first steam injection hole, The first supporting member is fixed to a first fixing member provided on a bottom surface of a first vapor distribution pier provided in each of the first to fourth steam chambers, In the fixing member 2 supporting member is fixed, a first elastic support body having an elastic body having an elastic force of a certain magnitude is coupled between the first and second support members, and the first elastic support body supports the first vapor distribution perforated plate And a first space portion is formed between the first and second steam chambers to the fourth steam chamber, and the first vapor distribution pier may be raised by the vapor pressure introduced into the first space portion, And the steam pressure is maintained constant through the steam spray hole. The present invention is characterized by providing an apparatus for maintaining the jet pressure of a reheat steam supply chamber in a coal drying apparatus.

In the present invention, it is preferable that the first vapor injection hole has a perforation rate of 10 to 15% with respect to the total area of the first vapor distribution perforated plate.

Further, in the present invention, a first stopper horizontally supporting the first vapor distribution pier may be installed on the inner wall of the first to fourth vapor chambers.

Further, in the present invention, it is preferable that the first elastic support is wrapped around the outer periphery of the first elastic support in a pocket.

Further, in the present invention, a second vapor distribution perforated plate having a plurality of second vapor injection holes formed in an upper portion or a lower portion of a first vapor distribution pier provided in each of the first to fourth vapor chambers may be installed.

Further, in the present invention, the first supporting member is fixed to the third fixing member provided on the bottom surface of the second vapor distribution pier, and the fourth supporting member provided on the surface of the first vapor- And a second elastic supporter having an elastic body having an elastic force of a predetermined magnitude is coupled between the first and second support members, and the second elastic supporter is provided with a plurality of And a second space portion is formed between the first steam distribution perforated plate and the second steam distribution perforated plate, and the second steam distribution perforated plate is elevated by the vapor pressure introduced into the second space portion so that the reheated steam injection pressure is constant .

Also, in the present invention, it is preferable that the second vapor injection hole has a perforation rate of 10 to 15% as compared with the total area of the second vapor distribution perforated plate.

Further, in the present invention, a plurality of branch steam supply pipes may be connected to the first to fourth steam chambers.

Further, in the present invention, a first stopper horizontally supporting the first vapor distribution pier may be provided on the inner wall of the first to fourth vapor chambers, and a second stopper may be provided to support the second vapor distribution pier The stopper may be installed to protrude from the first to fourth steam chambers.

Further, in the present invention, it is preferable that the second elastic support is wrapped around the outer periphery of the second elastic support in a pocket.

According to the present invention, in the multi-stage coal dryer, the high-temperature reheating steam is sprayed to the surface and inside of the coal at a uniform spray pressure, thereby removing the remaining water from the surface of the coal used as the fuel for the thermal power plant and the incomplete combustion , It is possible to improve the calorific value of coal and to minimize the emission of pollutants, improve the corrosion prevention and durability of the system, reduce the spontaneous ignition rate due to the decrease of moisture, and reduce the thermal diffusivity of the power generation boiler during the pulverization efficiency of the coal differentiator and coal. And it is possible to solve the problem of clogging of the passageways when the coal is transported, and it is possible to improve the stability of the coal supply by increasing the utilization of the low grade coal with low demand. 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.
4 is a perspective view showing a main part in which a jet pressure maintaining device is installed in a reheat steam supply chamber in a coal drying apparatus according to the present invention.
5 is a perspective view showing an apparatus for maintaining the jet pressure of a reheat steam supply chamber in a coal drying apparatus according to an embodiment of the present invention.
6A and 6B are cross-sectional views illustrating the operation of the jet pressure maintaining apparatus of the reheat steam supply chamber in the coal drying apparatus according to the present invention.
7 is a sectional view showing the operation of the jet pressure maintaining apparatus of the reheat steam supply chamber in the coal drying apparatus according to another embodiment of the present invention.
8 is a perspective view showing an apparatus for maintaining the jet pressure of a reheat steam supply chamber in a coal drying apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a jet pressure maintaining apparatus for a reheat steam supply chamber in a coal drying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method and apparatus for conveying coal while conveying coal using a conveying device such as a conveyor or a conveying plate and spraying reheated steam of a uniform pressure onto a coal having a constant water content introduced into a conveying device having a plurality of through- Thereby enhancing the drying effect. Further, the steam chamber for supplying the reheated steam is installed at the lower part of the conveying device of the coal dryer, and the high-temperature reheating steam generated in the reheater while the pulverized coal is transferred to the transfer device is sprayed at a constant pressure to dry the coal will be.

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, the coal of low carbon 10 without moisture removed may be transferred to the 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 show an example of a coal drying apparatus 100 in which a steam chamber for supplying reheat steam in a coal drying apparatus 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 driving 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, in the present invention, the steam supply pipes 121 for supplying the high-temperature reheated steam generated in the reheater 500 are connected to one side of the first steam chamber 120 and the second steam chamber 123, And a steam supply pipe 151 for supplying high-temperature reheated steam generated in the reheater 500 to one side of the fourth steam chamber 150 and the fourth steam chamber 153, respectively. And a plurality of first steam injection holes 11 formed in the upper portion of the first steam chamber 120, the second steam chamber 123, the third steam chamber 150 and the fourth steam chamber 153, And a vapor distribution piercing plate 10 are respectively installed. The first steam chamber 120 to the fourth steam chamber 153 are injected with the reheat steam of uniform pressure through the first steam injection hole 11, respectively. A plurality of elastic supporters 30 are installed between the first vapor distribution perforated plates 10 installed in the first to fourth vapor chambers 120 to 153 to form the first vapor distribution perforated plate 10 .

The first vapor chamber 120 is installed below the first guide rail 115 and the second vapor chamber 123 is installed below the second guide rail 116. The third vapor chamber 150 is installed below the third guide rail 145 and the fourth vapor chamber 153 is installed below the fourth guide rail 146. The first to fourth vapor chambers 120 to 153 may be partitioned into one or more.

A first exhaust gas chamber 124 is provided on the first guide rail 115 and a second exhaust gas chamber 126 is provided on the second guide rail 116. A third exhaust gas chamber 126 is provided on the third guide rail 145, An exhaust gas chamber 154 is provided and a fourth exhaust gas chamber 156 is provided on the fourth guide rail 146. [ The first exhaust gas chamber 124 to the fourth exhaust gas chamber 156 may be partitioned into one or more. The first exhaust gas chamber 124 to the fourth exhaust gas chamber 156 are respectively injected in the first to fourth vapor chambers 156 to 156 and then collected in the first gas exhaust pipe 125 or So that the gas can be discharged to the outside through the second gas discharge pipe 155.

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. 4, the vapor chamber 120 is formed with a space portion for receiving a reheated steam therein. A steam supply pipe 121 for supplying the high-temperature reheated steam generated in the reheater 500 is connected to one side of the steam chamber 120. A first steam distribution pier plate 10 having a plurality of first steam spray holes 11 formed therein is installed in an upper portion of the steam chamber 120. Further, a first vapor distribution perforated plate 10 having a plurality of first vapor injection holes 11 formed therein may be coupled to the upper end of the steam chamber 120.

The steam chamber 120 is installed under the transfer plate having a plurality of through holes to discharge the reheat steam of uniform pressure through the first steam injection hole 11.

5, a first support member 31 is fixed to a first fixing member 35 provided on the bottom surface of the first vapor distribution pier plate 10 disposed inside the vapor chamber 120, and the first support member 31 is fixed to the inside of the vapor chamber 120 And the second supporting member 32 is fixed to the second fixing member 36 provided on the bottom surface. A plurality of first elastic supporters 30 having an elastic body 33 having an elastic force of a predetermined magnitude are coupled between the first and second support members 31 and 32. The first elastic support 30 is installed to support the first vapor distribution pier plate 10 to form a first space 14 between the first elastic support 30 and the steam chamber 120, The first vapor distribution perforated plate 10 is raised by the introduced vapor pressure so that the reheated steam injection pressure is kept constant through the first vapor injection hole 11.

6A, when the vapor pressure does not flow into the first space 14 of the vapor chamber 120, the first vapor-distributing pawn board 10 is moved to the bottom of the vapor chamber 120 by the elastic force of the elastic body 33, Keep a certain distance from the surface. However, when the vapor pressure is introduced into the first space portion 14 of the vapor chamber 120, the first vapor distribution pier plate 10 is elevated by the vapor pressure so that a uniform vapor pressure is formed in the first space portion 14. Accordingly, a uniform vapor pressure formed in the first space portion 14 is injected to the transfer plate through the first vapor injection hole 11. If the steam pressure is not introduced into the steam chamber 120, the first vapor distribution pier plate 10 is returned to its original position by the elastic force of the elastic body 33. The elastic body 33 is preferably applied with a tension spring, but a compression spring may be applied. The first elastic supporter 30 is installed at a predetermined interval between the bottom surface of the steam chamber 120 and the first vapor distribution perforated plate 10 so that the first elastic supporter 30 It is preferable to have elasticity so as to uniformly support the first vapor distribution perforated plate 10 from the bottom surface. It is preferable that the pockets 30 are coupled to the outer periphery of the first elastic support 30 so that the foreign substances are not fixed to the elastic body from the outside.

A first stopper (37) for horizontally supporting the first vapor distribution perforated plate (10) is provided on the inner wall of the steam chamber (120). The first stopper 37 is capable of horizontally supporting the edge of the first vapor distribution perforated plate 10 when no vapor pressure is generated in the first spatial part 14. [

It is preferable that the first steam spray hole 11 has a perforation rate of approximately 10 to 15% with respect to the total area of the first vapor distribution perforated plate 10.

6B, the coal C to be dried is conveyed onto a plurality of conveyance plates 114 and 144 hinged to the chains 113 and 143, and a steam chamber (not shown) is disposed under the conveyance plates 114 and 144 120, 123, 150, and 153, respectively. The steam chamber is supplied with high-temperature reheated steam through the steam supply pipes 121 and 151. The reheated steam supplied to each of the steam chambers is filled in the first space portion 14, and then a certain pressure is formed, and the first perforated plate 10 for distributing the steam is raised by the pressure. At this time, the primary pressure of the reheated steam itself and the secondary pressure of the first steam distribution perforated plate 10 are formed in the first space portion 14 by the first steam distribution perforated plate 10. The first vapor distribution perforated plate 10 is raised to a certain height by the elasticity of the plurality of first elastic supports 30 coupled to the bottom surface of the vapor chamber. The reheated steam maintained a constant pressure in the first space portion 14 is injected into the first steam distribution perforated plate 10 through the first steam injection holes 11 formed at regular intervals, .

The reheated steam injected through the first steam injection hole 11 is applied to each particle of the coal C through the through holes 114a and 144a formed in the transfer plates 114 and 144. [ Therefore, the high temperature reheating steam is permeated through the pores between the particle surface of the coal and the coal particles to evaporate moisture contained in the coal particles. Further, since the first vapor injection holes 11 of the first vapor distribution perforated plate 10 are uniformly arranged, the reheat steam of a uniform pressure is injected through the first steam injection holes 11 to form the transfer plates 114 and 144 ) By allowing the reheated steam of a certain pressure to permeate throughout the coal (C) above, the drying effect is improved. Further, the plurality of first elastic supporters (30) elastically support the first vapor distribution piercing plate (10) so that a more uniform vapor pressure is sprayed.

7, in another embodiment of the vapor chamber of the present invention, a plurality of second vapor discharges are formed on the first vapor distribution pier plate 10 installed in the first to fourth vapor chambers 120 to 153, A second vapor distribution perforated plate 12 through which the holes 13 penetrate is provided.

The first supporting member 41 is fixed to the third fixing member 45 provided on the bottom surface of the second vapor distribution piercing plate 12 and the fourth fixing member 41 provided on the surface of the first vapor- And the second supporting member 42 is fixed to the member 46. [ A second elastic support 40 having an elastic body 43 having an elastic force of a predetermined magnitude is coupled between the first support member 41 and the second support member 42. A plurality of second elastic supports (40) are installed to support the second vapor distribution perforated plate (12). A second space portion 15 is formed between the second vapor distribution perforated plate 12 and the first vapor distribution perforated plate 10. The second vapor distribution piercing plate 12 is raised by the vapor pressure introduced into the second space portion 15 so that the injection pressure of the reheated steam is kept constant through the second vapor injection hole 13. It is preferable that the pockets 44 are coupled to the outer periphery of the second elastic supporter 40 so that the foreign matter does not adhere to the elastic body.

A first stopper 37 for horizontally supporting the first vapor distribution perforated plate 10 is provided on the inner wall of the steam chamber 120 and a second stopper 37 for horizontally supporting the second vapor distribution perforated plate 12 is provided. 2 stopper 47 is protruded. The first stopper 37 allows the edge of the first vapor distribution perforated plate 10 to be horizontally supported when no vapor pressure is generated in the first space portion 14, 2 horizontally supporting the edge of the second vapor distribution perforated plate 12 when no vapor pressure is generated in the space portion 15. [

The coal C to be dried is transferred onto the plurality of conveyance plates 114 and 144 hinged to the chains 113 and 143 and the steam chambers 120, 150, and 153, respectively. The steam chamber is supplied with the high-temperature reheated steam through the steam supply pipes 121 and 151. The reheated steam supplied to each of the steam chambers is filled in the first space portion 14, and then a certain pressure is formed, and the first perforated plate 10 for distributing the steam is raised by the pressure. At this time, the primary pressure of the reheated steam itself and the secondary pressure of the first steam distribution perforated plate 10 are formed in the first space portion 14 by the first steam distribution perforated plate 10. The first vapor distribution perforated plate 10 is raised to a certain height by the elasticity of the plurality of first elastic supports 30 coupled to the bottom surface of the vapor chamber. The reheated steam maintained a constant pressure in the first space portion 14 is injected into the first steam distribution perforated plate 10 through the first steam injection holes 11 formed at regular intervals, .

In addition, the reheated steam injected from the first space portion 14 through the first steam injection hole 11 of the first steam distribution perforated plate 10 is filled in the second space portion 15 and then a certain pressure is formed , And lifts the second vapor distribution perforated plate (12) by this pressure. At this time, the secondary pressure is formed by the primary pressure of the reheated steam itself and the secondary pressure by the secondary vapor distribution perforated plate 12 by the second steam distribution perforated plate 12. The second steam distribution perforated plate 12 is raised to a certain height by the elasticity of the plurality of second elastic supports 40 coupled to the surface of the first vapor distribution perforated plate 10. [ The reheated steam having a constant pressure maintained in the second space part 15 is injected into the second steam distribution perforated plate 12 through the second steam injection hole 13 formed at regular intervals, .

The reheated steam injected through the second steam spray hole 13 is applied to each particle of the coal C through the through holes 114a and 144a formed in the transfer plates 114 and 144. [ Therefore, the high temperature reheating steam is permeated through the pores between the particle surface of the coal and the coal particles to evaporate moisture contained in the coal particles. Further, since the second vapor injection holes 13 of the second vapor distribution perforated plate 12 are uniformly arranged, the reheat steam of a uniform pressure is injected through the second steam injection holes 13 to form the transfer plates 114 and 144 ) By allowing the reheated steam of a certain pressure to permeate throughout the coal (C) above, the drying effect is improved. Further, the second vapor distribution piercing plate 12 is elastically supported by the plurality of second elastic supports 40, so that a more uniform vapor pressure is sprayed. The uniformly dispersed steam pressure by the first steam distribution perforated plate 10 elastically supported by the first elastic supporter 30 installed in the first space portion 14 of the steam chamber and the uniformly dispersed steam pressure by the second The steam is uniformly dispersed by the second vapor distribution perforated plate 12 elastically supported by the second elastic supporter 40 installed in the space portion 15 and is discharged uniformly onto the transfer plates 114 and 144 It is possible to more effectively and quickly dry the coal (C) by allowing the reheated steam of a more constant pressure to permeate throughout the coal (C).

It is preferable that the second steam spray hole 13 has a perforation rate of 10 to 15% with respect to the total area of the second vapor distribution perforated plate 12. [

8, in another embodiment of the present invention, a plurality of branch steam distribution pipes 20 are connected to one side of the steam chamber. That is, the distribution steam supply pipe 20 is connected to one side of each of the first to fourth steam chambers 120 to 153 so that the first space portion 14 is filled with the reheated steam of uniform pressure. Accordingly, each of the first to fourth vapor chambers 120 to 153 is branched to the distribution steam supply pipe 20 so that the reheated steam of a more uniform pressure is supplied and filled by the supplied reheated steam, Allows reheating steam of constant pressure to be sprayed over the entire coal on the plate. Further, the distribution steam supply pipe 20 may be provided so as to be supplied to the second space portion 15.

As described above, the apparatus for maintaining the jet pressure of the reheat steam supply chamber in the coal drying apparatus of the present invention is characterized in that, while coal for drying is transferred onto a plurality of transfer plates for transferring coal, It is possible to effectively remove the moisture contained in the coal by spraying the high-temperature reheating steam, thereby effectively drying the coal particles and the air gap.

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.

[0001] The present invention relates to a steam distribution apparatus for a steam distribution, and more particularly, to a steam distribution apparatus for a steam distribution apparatus, 1 elastic support 31, 41: first supporting member 32, 42: second supporting member 33, 43: elastic body 34, 44: pocket 35: first fixing member 36: second fixing member 37: first stopper 40: The first and second coal dryers 111 and 141 and the drive sprockets 112 and 142 are driven by the driven sprockets 113 and 113a and 113b and 143, A guide bar 118 and a drive motor 119. The guide bar 118 is provided at the center of the guide rail 118, A gas exhaust pipe 130, a gas inlet pipe 131, a gas inlet pipe 131, a gas inlet pipe 131, Outlet 140: second coal dryer 170: a third coal dryer 200: jeotanjang 300: coal supply tank 400 for drying: coal supply amount 500: reheater 600: dry coal storage tank 700: Thermal Power Plant C: Coal

Claims (10)

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 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, A fourth off-gas chamber the second coal dryer was installed to house and to put the primary drying coal from the first coal dryer in the second drier coal in coal drying system made to secondary drying,
Wherein the first steam chamber, the second steam chamber, and the fourth steam chamber are connected to one side of the first steam chamber, the second steam chamber, the third steam chamber and the fourth steam chamber, respectively, A first vapor distribution piercing plate having a plurality of first vapor injection holes penetrating through the third vapor chamber and the fourth vapor chamber is installed to discharge reheat steam of a uniform pressure through the first vapor injection hole,
A first support member is fixed to a first fixing member provided on a bottom surface of a first vapor distribution pier provided in each of the first to fourth vapor chambers, and the first to fourth vapor chamber inner bottom surfaces A first elastic support body having an elastic body having an elastic force of a predetermined magnitude is provided between the first and second support members, A plurality of the first vapor distribution piercing plates for supporting the first vapor distribution piercing plate to form a first space between the first and fourth vapor chambers and the first space partition, So that the reheat steam injection pressure is kept constant through the first vapor injection hole.
[2] The apparatus of claim 1, wherein the first steam injection hole has a perforation ratio of 10% to 15% of the total area of the first steam distribution perforated plate.
2. The apparatus according to claim 1, wherein a first stopper protruding from the first vapor chamber to the fourth vapor chamber is horizontally supported on the side wall of the first vapor chamber to the fourth vapor chamber.
The apparatus of claim 1, further comprising a pocket surrounding the periphery of the first elastic support.
The coal drying apparatus according to claim 1, wherein a second vapor distribution pier is provided in the upper or lower portion of the first vapor distribution pier disposed in each of the first to fourth vapor chambers, A device for maintaining the jet pressure of a reheated steam supply chamber.
[6] The steam distributor according to claim 5, wherein a first supporting member is fixed to a third fixing member provided on a bottom surface of the second vapor distribution pier, and a second supporting member is fixed to a fourth fixing member provided on the surface of the first vapor- A second elastic support having an elastic body having an elastic force of a predetermined magnitude is provided between the first and second support members and a plurality of second elastic supports are installed to support the second vapor distribution pier plate The second space portion is formed between the first steam distribution perforated plate and the second steam distribution perforated plate is elevated by the vapor pressure introduced into the second space portion so that the reheated steam injection pressure is uniformly distributed through the second steam injection hole Wherein the steam is supplied to the drying chamber.
The apparatus of claim 5 or 6, wherein the second steam injection hole has a perforation ratio of 10 to 15% of the total area of the second steam distribution perforated plate.
The apparatus according to claim 5, wherein a plurality of branched steam supply pipes are connected to the first to fourth steam chambers.
7. The steam distributor as set forth in claim 6, wherein a first stopper horizontally supporting the first vapor distribution piercing plate is provided to protrude from a side wall of the first to fourth vapor chambers, and a second stopper Is projected on the inner wall of the first to fourth vapor chambers.
7. The apparatus according to claim 6, further comprising a pocket surrounding the outer circumference of the second elastic support.
KR20140073216A 2014-06-17 2014-06-17 Apparatus for Support Injection Pressure of Chamber for Supply Reheat Steam in System for Drying Coal KR101497567B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR20140073216A KR101497567B1 (en) 2014-06-17 2014-06-17 Apparatus for Support Injection Pressure of Chamber for Supply Reheat Steam in System for Drying Coal
PCT/KR2015/006142 WO2015194858A1 (en) 2014-06-17 2015-06-17 Apparatus for controlling steam pressure in apparatus for drying coal using reheat steam
RU2017101198A RU2017101198A (en) 2014-06-17 2015-06-17 VAPOR PRESSURE CONTROL DEVICE IN THE COAL DRYING SYSTEM USING OVERHEATED STEAM
CN201580031977.2A CN106574820A (en) 2014-06-17 2015-06-17 Apparatus for controlling steam pressure in apparatus for drying coal using reheat steam
AU2015278422A AU2015278422B2 (en) 2014-06-17 2015-06-17 Apparatus for controlling steam pressure in apparatus for drying coal using reheat steam
CA2952215A CA2952215A1 (en) 2014-06-17 2015-06-17 Apparatus for adjusting steam pressure in a system for drying coal using reheat steam
US15/320,137 US20170130152A1 (en) 2014-06-17 2015-06-17 Apparatus for adjusting steam pressure in a system for drying coal using reheat steam
PH12016502493A PH12016502493A1 (en) 2014-06-17 2016-12-14 Apparatus for adjusting steam pressure in a system for drying coal using reheat steam

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Publication number Priority date Publication date Assignee Title
CN107144114A (en) * 2017-06-08 2017-09-08 湖南雨泉医药有限公司 A kind of rhizome traditional Chinese medicinal materials drying unit

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JPS59204684A (en) * 1983-05-10 1984-11-20 Nippon Steel Chem Co Ltd Drying process for coal
JP2012091087A (en) * 2010-10-25 2012-05-17 Nippon Steel Corp Raw material coal drying and classifying device
KR20120075167A (en) * 2010-12-28 2012-07-06 주식회사 포스코 Device and method for drying coal for coke oven

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204684A (en) * 1983-05-10 1984-11-20 Nippon Steel Chem Co Ltd Drying process for coal
JP2012091087A (en) * 2010-10-25 2012-05-17 Nippon Steel Corp Raw material coal drying and classifying device
KR20120075167A (en) * 2010-12-28 2012-07-06 주식회사 포스코 Device and method for drying coal for coke oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107144114A (en) * 2017-06-08 2017-09-08 湖南雨泉医药有限公司 A kind of rhizome traditional Chinese medicinal materials drying unit

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