JPH0986621A - Coal yard facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of coal dust generated at the time of the initial feed of coal by erecting a side wall under a feed hopper for separating coal feed space in a building, and forming a plurality of discharge ports drilled through the side wall along upper and lower rows for discharging the coal into the building via lids opened due to falling coal. SOLUTION: A plurality of upper and lower rows of discharge ports 20 for coal 8 are drilled through two side walls 19 laid vertically at the lower part of the discharge machine 4 of the coal 8 for, separating space for the feed thereof, and the coal 8 is discharged through the discharge ports 20, depending upon the stacked height thereof. When an angle of repose is kept at the discharge ports 20 and the coal 8 at the level thereof cannot be discharged, the level of the coal 8 under feed rises in such a state as deposited between the two side walls 19, and the coal 8 is discharged from the discharge ports 20 at an upper level, while forcibly opening lids 21. Regarding the discharge ports 20 at an intermediate level only for the flow of the coal 8 under feed, the lids 21 are in a close state, due to the tare weight thereof, and prevent the scatter and dispersion of whirling coal dust generated at the time of feeding the coal 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a coal storage facility applied as an indoor storage facility for coal in a thermal power plant or the like.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory diagram of a conventional coal storage silo used as an indoor storage facility for coal in a thermal power plant or the like. In the figure, a coal storage silo that inputs coal from the top of the building and discharges it from the bottom is often used as an indoor storage facility for coal in thermal power plants, etc.The coal storage silo fills almost the entire volume of the building with coal. Because it is possible to use the site efficiently,
Further, there is an advantage in that mechanical equipments required for receipt and delivery are hardly required except for the belt conveyor. Reference numeral 01 in the figure is a coal storage silo that stores coal 08, and many are arranged depending on the site. Reference numeral 02 denotes a belt conveyor that conveys the loaded coal 08 to each coal storage silo 01. A space 03 is provided as a safety measure between the coal storage silo 01 and the coal storage silo 01, assuming that coal 08 spontaneously ignites. Reference numeral 04 is a self-propelled payout machine that can pay out coal 08 at any position of the coal storage silo 01, and operates in a direction indicated by an arrow 06 in pair with a belt conveyor 02 driven by a motor 05.
Reference numeral 07 is a hopper provided for loading the loaded coal 08 on the belt conveyor 02.

Coal 08 is conveyed by a belt conveyor 02, dropped from a payout machine 04 at an arbitrary position of a coal storage silo 01, and accumulated and stored in the coal storage silo 01. The coal 08 is dispensed by a feeder (not shown) from a dispensing port 010 provided in the lower hopper 09. 011 indicates the state of accumulation of coal 08, and 012 is methane gas generated because coal 08 is accumulated and stored. 013 is generated when the pulverized coal that is generated when the coal 08 is conveyed by the belt conveyor 02 is sucked into the coal storage silo 01 so that the pulverized coal does not float in the belt conveyor chamber 014, and when the coal 08 is dropped. Ventilation port 015 is forced to prevent methane gas 012 generated during the accumulation of coal dust and coal 08 from accumulating.
It is an air supply port installed to guide to. Ventilation port 01
Coal dust, methane gas 012, etc. flowing in from No. 5 are recovered via the intake duct 016.

[0004]

In the conventional coal storage silo as described above, the coal 08 dropped from the payout machine 04 is stored in the coal storage silo 01 in the accumulated state 011. Therefore, the coal 08 is generated by dropping the coal 08. The amount of coal dust generated increases as the fall distance increases. For this reason, the amount of coal dust generated at the initial input when the amount of coal 08 deposited is small increases,
There is a risk that coal dust will float in the coal storage silo 01 and cause an explosion.

[0005]

The coal storage facility according to the present invention is intended to solve the above-mentioned problems. The coal storage facility of the present invention is designed to drop coal from a charging port provided at the upper part of a building and deposit and store the coal inside. A side wall is installed below the input port in the storage facility to define a space for coal to be dropped into the building, and multiple discharge ports are drilled vertically on the side wall to drop the lid into the building by the coal being dropped. It is designed to emit coal. The coal dropped from the charging port is discharged from the coal discharging port formed on the upper and lower sides of the side wall by pushing the lid open according to the stacking height of the coal. After the angle of repose is maintained at this discharge port and the discharge becomes impossible, the coal to be charged rises while further accumulating in the space in the side wall, and then the lid is pushed open and discharged from the discharge port on the upper stage. At this time, the lid of the discharge port in the middle of passing the dropped coal without being discharged is closed by its own weight, and the scattering and diffusion of the coal dust flying at the time of dropping the coal is suppressed.

[0006]

1 and 2 are explanatory views of a coal storage silo according to an embodiment of the present invention. In the figure,
The coal storage silo according to the present embodiment is used as an indoor storage facility for coal in a thermal power plant or the like.As an indoor storage facility for coal in a thermal power plant, coal is input from the upper part of the building and discharged from the lower part. Most of the coal storage silos to be used are used, and since the coal storage silo can be filled with coal over almost the entire volume of the building, the utilization efficiency of the site is high, and the mechanical equipment required for receipt and delivery is also other than the belt conveyor. Has the advantage that it is rarely needed. Reference numeral 1 in the figure is a coal storage silo that stores coal 8, and many are arranged according to the site. Reference numeral 2 is a belt conveyor that conveys the loaded coal 8 to each coal storage silo 1. A space is provided as a safety measure between the coal storage silo 1 and the coal storage silo 1, assuming that the coal 8 spontaneously ignites. Reference numeral 4 denotes a self-propelled payout machine that can pay out coal 8 at any position of the coal storage silo 1, and operates in pair with a belt conveyor 2 driven by a motor. Although not shown, a hopper is provided for loading the loaded coal 8 on the belt conveyor 2.

As shown in FIG. 1, coal 8 is conveyed by a belt conveyor 2, dropped from a dispenser 4 at an arbitrary position of the coal storage silo 1 and accumulated and stored in the coal storage silo 1. The coal 8 is paid out by a feeder (not shown) from a payout opening 10 provided in the lower hopper 9. 12 is a methane gas generated because coal 8 is accumulated and stored. 13 is generated when the pulverized coal that is generated when the coal 8 is conveyed by the belt conveyor 2 is sucked into the coal storage silo 1 so that the pulverized coal does not float in the belt conveyor chamber 14, and when the coal 8 is dropped. The air supply port is installed to forcibly lead the methane gas 12 generated during the accumulation of coal dust or coal 8 to the ventilation port 15 so as not to stay. Charcoal dust, methane gas 12, etc. flowing in from the ventilation port 15 are recovered via the intake duct 16. In the present coal storage silo, the air supply port 13 and the ventilation port 15 are mainly ventilation facilities for the methane gas 12 generated during coal storage. Reference numeral 19 denotes two side walls mounted in the central portion of the coal storage silo so as to face each other in parallel with each other in a direction in which the coal dispenser 4 self-propels, and is vertically installed at the lower part of the dispenser 4 and has the maximum size of the coal 8. A space enough to satisfy the stacking height is defined in the lower part of the payout machine 4.
The lower end of the side wall 19 is located above the top of the lower hopper 9, and is provided to a height that sufficiently satisfies the loading of the coal 8 in the lower stage.

As shown in FIG. 2 (a), the two side walls 19 are provided with a plurality of stages of coal discharge ports 20 in the height direction. The discharge ports 20 are shown in FIG. 2 (b). As described above, the lid 21 provided on the side wall 19 is pushed by the coal 8 while the coal is being thrown inside the side wall 19 or the discharging machine 4 is moving and the stacking height of the coal 8 has not reached the discharge port 20. It is in a closed state. 22 is the side wall 19 and the lid 2
It is a hinge that connects 1 and. As shown in FIG. 3C, when the coal 8 is gradually loaded inside the side wall 19 and is sufficiently loaded, the coal 8 pushes the lid 21 to pass through the discharge port 20, and the coal is stored. It is discharged into the silo 1. The discharge continues until the periphery of the discharge port 20 is sufficiently filled with the coal 8, and when the angle of repose at the upper limit of the discharge port 20 is sufficiently maintained, the coal 8 is further loaded inside the side wall 19 and the next upper stage It reaches the discharge port 20 and is discharged similarly. By such repetition, the coal 8 reaches the maximum loading height at the final point. 18 is a flow of soaring coal dust, 23 is installed between two side walls 19 and the side wall 19 is connected to the coal storage silo 1.
Is a plurality of fixing members that are fixed to the bottom portion of and are reinforced.

[0009] As described above, a space is provided vertically below the coal dispenser 4 for partitioning the space in which the coal 8 is dropped.
A discharge port 20 of the coal 8 is formed in a plurality of upper and lower stages on the side wall 19 of the sheet, and the coal 8 is discharged from the discharge port 20 in accordance with the height at which the coal 8 is stacked. The coal 8 that has been dropped since the time when discharge at the same stage became impossible rises while accumulating between the two side walls 19,
It is discharged from the next upper outlet 20 while pushing the lid 21 open. At the discharge port 20 halfway through which the dropped coal 8 passes, the lid 21 is closed by its own weight,
Prevents scattering and diffusion of coal dust that is generated when the coal 8 is dropped.

In the conventional coal storage silo, since the coal dropped from the dispenser is stored in the coal storage silo in a piled state, the amount of coal dust generated by dropping the coal increases as the fall distance increases. For this reason, the amount of coal dust generated at the initial input when the amount of coal deposited is small increases particularly, and there is a risk that coal dust will float in the coal storage silo and cause an explosion. 2 side walls 19 parallel to the self-propelled direction of the coal dispenser 4 are provided from the lower part of the dispenser 4 to the bottom of the coal storage silo 1 to define a space into which the coal 8 is dropped, and the side walls 19 are A plurality of discharge ports 20 for the coal 8 are provided on the upper and lower sides, and a lid 21 is attached to the discharge ports 20. The coal dust that floats up when the coal 8 is dropped is trapped in the space formed by the two side walls 19 provided in the coal storage silo 1 in parallel with the traveling direction of the dispenser 4 for the coal 8 and stored in the coal storage silo. The amount of coal dust in 1 almost disappears. When the coal 8 pushes the lid 21 provided on the discharge port 20 open, the coal 8 is discharged.
Smoothly discharged from. In this way, coal storage silo 1
Inside, the coal dust rises only in the space defined by the side wall 19, so that the coal dust is scattered throughout the coal storage silo 1,
It prevents diffusion and prevents accidents such as coal dust explosion.

[0011]

The coal storage facility according to the present invention is constructed as described above, and the scattering and diffusion of the coal dust that rises when the coal is dropped is suppressed, so that the explosion of coal dust is prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a coal storage silo according to an embodiment of the present invention.

2 (a) is a front view of the side wall, FIG. 2 (b),
(C) is an explanatory view of the operation.

FIG. 3 (a) is a perspective view of a conventional coal storage silo, FIG. 3 (b) is a plan view, and FIG. 3 (c) is a sectional view.

[Explanation of symbols]

 1 Coal Storage Silo 2 Belt Conveyor 4 Discharge Machine 8 Coal 9 Lower Hopper 10 Discharge Port 12 Methane Gas 13 Air Supply Port 14 Belt Conveyor Chamber 15 Ventilation Port 16 Ventilation Duct 18 Carbon Dust Flow 19 Sidewall 20 Discharge Port 21 Lid 22 Hinge 23 Fixing Member

Claims (1)

[Claims] 1. A coal storage facility for dropping coal from an input port provided at an upper part of a building and accumulating and storing the coal inside a space provided below the input port and in which the coal is injected into the building. A coal storage facility comprising: a side wall for partitioning; and a plurality of discharge ports for discharging coal into the building by opening a lid by the coal that is vertically formed on the side wall and dropped.