JPS6119501B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a large-scale underground or semi-underground coal storage facility in which a large amount of coal is stored underwater or dry so that it can be loaded in advance and taken out in advance.

BACKGROUND ART Conventionally, underground or semi-underground underwater storage facilities (coal storage pits) are known (for example, the one described in Japanese Patent Publication No. 53-3548).

By the way, underground or semi-underground coal storage facilities can easily be constructed with a considerably large capacity due to their structure, and are suitable for storing large amounts of coal. Moreover, it is easy to harmonize with the surrounding landscape. Also,
Underwater storage type coal storage facilities are extremely effective in preventing deterioration of coal quality due to oxidation, ensuring safety against spontaneous combustion, and preventing dust pollution.

Problems to be Solved by the Invention However, conventional underground or semi-underground coal storage facilities have the disadvantage that coal cannot be loaded or unloaded in advance, which tends to result in permanently stored coal. , it is normal that they are not carried out. In other words, it is common for coal storage pits to be emptied before new coal is brought in and stored, resulting in the problem of extremely low coal storage efficiency and operational efficiency.

Therefore, the first object of this invention is to provide an underground or anti-underground coal storage facility that can store a large amount of coal in a first-in and first-out manner, does not create permanent coal storage, and has good coal storage and operation efficiency. It's about doing.

The second purpose of this invention is to be able to carry out either dry coal storage or underwater coal storage, prevent deterioration of coal quality due to oxidation etc. by underwater coal storage, ensure high safety against spontaneous combustion, etc. The objective is to provide a coal storage facility that is also effective in preventing dust pollution.

Means for Solving the Problems (First Invention) As a means for solving the problems of the above-mentioned prior art, the coal storage facility of the present invention has the following embodiments as shown in FIGS. 1 to 5: First, the bottom surface 1b of the coal storage pit 1 is sloped at an angle θ greater than the angle of repose of the coal, and a partition wall 2 rising vertically upward from the deepest part of the bottom surface is installed approximately parallel to the longitudinal direction of the coal storage pit 1. A gap b is provided between the lower end of the partition wall 2 and the bottom surface 1b of the coal storage pit to allow movement of a predetermined amount of stored coal.

Then, the stored coal 3 is taken out from the space 5 partitioned by the partition wall 2 by appropriate means, and on the other hand, the coal is brought into the outside part of the space 5 from above and stored there. The structure is as follows.

Function When the coal to be stored in the coal storage pit 1 is put into the outside part of the space 5, the coal is deposited on the sloping bottom surface 1.
b collapses, crosses the distance h between the lower ends of the partition wall 2, reaches the space 5, and accumulates at a certain level.

On the other hand, when the stored coal 3 directly below is discharged through the space 5, the stored coal 3 gradually slides into the space 5 immediately below based on the slope of the bottom surface 1b in an amount corresponding to the discharged amount.

Therefore, the stored coal 3 is properly handled on a first-in, first-out basis.

Incidentally, the inside of the coal storage pit 1 can be stored underwater by filling water to a level where the stored coal 3 is completely submerged, and this does not affect the above-mentioned handling of the coal at all.

On the other hand, dry storage without using any water is also possible.

(Second invention) As a means for solving the same problem as above, the coal storage facility of the present invention has the entire structure of the first invention as a main part, and further includes a lower end of the partition wall 2 and a coal storage facility. A device 16 is added to a part of the pit 1 at a distance h between the pit 1 and the bottom surface 1b by breaking the arching of the stored coal 3 and artificially promoting its collapse movement.

Note that as a device for breaking the arching of the stored coal and promoting its movement, for example, a coal stirring blade device 16 or a vibration device is used.

In other words, even though the stored coal 3 is discharged one after another from the space 5 partitioned by the partition wall 2, the stored coal 3 in the coal storage pit 1 causes a bridging phenomenon and the space 5 partitioned by the partition wall 2 If the stored coal 3 stops collapsing, the stirring blade device 16 is driven to break the arching, promote smooth collapsing of the stored coal 3, and smoothly discharge the stored coal.

Embodiment Next, a preferred embodiment of the present invention shown in FIG. 1 and subsequent figures will be described.

First, FIG. 1 shows a vertical cross section and an external view of a coal storage facility according to a first embodiment of the present invention.

1 in the figure is an underground coal storage pit constructed by excavating the ground and constructing it in the shape of an elongated rectangular pool with an open top. This coal storage pit 1 has a side wall 1a and a bottom surface 1b.
The bottom surface 1b is formed as an impermeable concrete wall or the like, and the angle of repose of the coal (approximately 40
It is formed as a slanted wall that is slanted almost symmetrically on the left and right sides at an angle θ greater than or equal to .

In the figure, 2 and 2 are the bottom surface 1 of the coal storage pit 1.
This is the partition wall installed at the deepest part of the coal storage pit 1, that is, at the center of the cross section of the coal storage pit 1. These two partition walls 2, 2 rise vertically upward and approximately parallel to each other from the bottom surface 1b at a distance h suitable for the collapsing movement of the stored coal 3, and are also approximately parallel to the longitudinal direction of the coal storage pit 1. It is installed in a suitable arrangement. The interval between the two partition walls 2, 2 is set to be suitable for taking out stored coal, that is, installing and operating a coal carrying device.

In the figure, numeral 3 indicates the stored coal carried into the coal storage pit 1, and 4 indicates the water that filled the coal storage pit 1 to such an extent that the stored coal 3 was completely submerged, and the position of the water surface.

Note that a fixed or movable roof is installed on the upper surface of the coal storage pit as necessary.

In the coal storage facility configured as described above, the coal to be stored is carried in, for example, by a movable stacker-type or girder-mounted belt conveyor along the coal storage pit 1, separated by two parallel partition walls 2, 2. Both outside parts of the space 5 (inside the coal storage pit 1)
A considerable amount of coal is brought in from above the coal storage pit 1 at any time and stored submerged below the water surface 4. Therefore, the stored coal 3 in water is prevented from deteriorating in quality due to spontaneous combustion and oxidation, and there is no risk of dust pollution occurring.

Incidentally, by increasing the depth and length of the coal storage pit 1, the coal storage capacity increases proportionally, so that it is suitable as a storage facility for a large amount of coal.

On the other hand, the stored coal 3 is taken out using the coal unloading device shown in FIG. This is done by The coal 3 carried in and stored on both sides of the partition walls 2, 2 will gradually collapse and slide into the area directly below this space 5, so by taking out the stored coal 3 one after another, the stored coal 3 will be expanded. This results in a first-in, first-out operation. In other words, in this coal storage facility, coal is reliably loaded in and taken out first, and there is no risk of permanently storing coal. Therefore, coal can be brought in and stored in the areas on both outsides of the partition walls 2, 2 at any time in a full state, and on the other hand, the stored coal 3 can be taken out in a desired amount from the area in the space 5 at any time. As a coal storage facility, it has extremely high coal storage efficiency and operational efficiency.

(Other Embodiments) (Part 1) When the coal storage facility with the above configuration is used without storing water in the coal storage pit 1, it can be used immediately as a dry coal storage facility in exactly the same way.

(Part 2) By making the bottom surface 1b of the coal storage pit 1 have a single-slope structure and installing the partition wall 2 in parallel with the deep side wall 1a, it is possible to use only one partition wall 2.

(Part 3) Two or more partition walls 2 may be installed depending on the convenience of coal extraction and other reasons.

(Part 4) Figure 2 A and B show two partition walls 2,
A chain bucket type coal lifting device 7 that reaches the stored coal 3 exposed directly below the space 5 is lowered from a movable platform 6 that straddles the upper surface of the coal lifting device 7.
This figure shows how a coal carrying device is used, which is equipped with a side conveyor 8 that conveys the coal raised to the level of the movable platform 6 to a coal carrying conveyor 9 installed along the edge of the coal storage pit 1. There is.

(Part 5) In FIGS. 3A and 3B, a bucket wheel 11 and a submersible pump 12 are installed at the lower end of the support column 10, and the stored coal 3 scooped up by the bucket wheel 11 is transferred to a transport pipe 13 by the submersible pump 12.
This figure shows how the coal transport device is configured to transport coal by hydraulic power through the coal transport system.

The support column 10 is supported by a movable platform, girder, or the like that is movable on the partition walls 2, 2.

(Part 6) Fig. 4 shows an agitator that protrudes from the lower end of the column 15 at a distance h between the lower end of the partition wall 2 and the bottom surface 1b to break the arching of the stored coal 3 and promote its smooth falling movement. A vane device 16 and an electric motor (or hydraulic motor, etc.) that rotationally drives the blade device 16
17 is installed. Further, a usage mode of the coal transport device is shown in which a submersible pump 18 is installed and the stored coal 3 is hydraulically transported by the submersible pump 18 through a transport pipe 19. The pillar 15 is supported by a girder or the like.

(Part 7) In FIGS. 5A and 5B, a scraping conveyor 20 is installed at the bottom of the space 5 and extends over almost the entire length in the longitudinal direction of the space 5, and a coal scraping tank 2 which is deeper on one side of the coal storage pit 1 is installed.
1 is provided, and the scraping plate 20 of the scraping conveyor 20 is provided.
The stored coal 3 is transferred to the coal scraping tank 21 by a...
It shows a structure that is scraped out inward. The stored coal 3 scraped into the coal scraping tank 21 is guided to a submersible pump 23 by a hopper 22, and the stored coal 3 is hydraulically transported by the submersible pump 23 through a transport pipe 24. It shows.

(Effects of the Invention) As described in detail above in conjunction with the embodiments, the coal storage facility of the present invention allows coal to be put in and taken out first, and never leaves permanently stored coal. Moreover, coal can be brought in and taken out at the same time or at any time, so coal storage efficiency and operational efficiency are extremely high.

In addition, both dry coal storage and underwater coal storage are possible; underwater storage prevents deterioration of quality due to coal oxidation, ensures high safety against spontaneous combustion, etc., and also prevents dust pollution. be effective.

Furthermore, since it is an underground type or anti-underground type configuration,
It can be constructed on a large scale at low cost, and contributes to cheap long-term storage of large amounts of coal. Moreover, underground or sub-underground coal storage facilities have the advantage of being in good harmony with the surrounding environment.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a coal storage facility according to the present invention, Fig. 2 A, B, Fig. 3 A, B, Fig. 4, Fig. 5 A,
B is a sectional view showing an example of application of the coal carrying device.

Claims (1)

[Claims] 1. The bottom surface 1b of the coal storage pit 1 is inclined at an angle θ greater than the angle of repose of the coal, and the partition wall 2 rising vertically upward from the deepest part of the bottom surface 1b is arranged approximately in the longitudinal direction of the coal storage pit 1. A space 5 partitioned by the partition wall 2 is installed in parallel, and a distance h is provided between the lower end of the partition wall 2 and the bottom surface 1b of the coal storage pit, which is sufficient to move the stored coal 3 by a predetermined amount. A coal storage facility characterized in that the stored coal 3 is taken out from a part, and the coal is carried into a part outside the space 5 from above and stored. 2. A coal storage facility characterized in that the coal storage pit 1 described in claim 1 is filled with water to the extent that the stored coal 3 is submerged in water. 3. The bottom surface 1b of the coal storage pit 1 is inclined at an angle θ greater than the angle of repose of the coal, and the partition wall 2 rising vertically upward from the deepest part of the bottom surface 1b is installed approximately parallel to the longitudinal direction of the coal storage pit 1, and A distance h is provided between the lower end of the partition wall 2 and the bottom surface 1b of the coal storage pit to move the stored coal 3 by a predetermined amount, and the arching of the stored coal 3 is broken at the portion of the distance h to encourage its movement. A removing device 16 is installed, and the stored coal 3 is taken out from a part of the space 5 partitioned by the partition wall 2, and the coal is carried into a part outside the space 5 from above and stored. A coal storage facility characterized by: