JPH08277008A - Catching and collecting device of dust scattered from outdoor storage yard - Google Patents

Abstract

PURPOSE: To reduce blowing and scattering of dusts due to wind and to improve efficiency for catching and collecting scattered dusts by providing a mound having an inclined surface by specified times more than the height of a pile between a storage yard having a massive pile of fluid mixtures and a city area and arranging a through-hole shutting off body, for instance a net, on its surface. CONSTITUTION: In an outdoor storage yard 1, massive coals having a mixture of coals and powders are piled and coal piles 5a to 5c each having a height (h) are formed at the intervals of about 4h to 6h(m). A mound 8 composed of blast furnace slags is provided between a city area 7 and the coal pile 5c. The height of the mound is set to the range of 1 to 1.5 times higher than the heights (h) of the coal piles 5a to 5c. By setting a flow passage for powders and dusts 6 scattered by an air current after being blown up from the coal piles 5a to 5c via the inclined surface 8t of the mound 8, the powders and dusts 6 are caught and collected by net fences 9a to 9n erected in the mound 8. By simultaneously reducing the speed of an air current 4, the scattering quantities of the powders and dusts 6 to the city area 7 are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, when agglomerates of powder mixture of ores, coal, etc. are stored in an outdoor storage yard, the powder scattered by wind is collected between the yard and the urban area, The present invention relates to a facility for collecting scattered dust from an outdoor storage yard to improve the local environment around the outdoor storage yard.

[0002]

2. Description of the Related Art Conventionally, when an agglomerated raw material of powder mixture of ore, coal, etc. is stored in an outdoor storage yard, it is scattered by the wind, dust is scattered to the city area, and the local environment around this outdoor storage yard Therefore, various dust countermeasures have been taken.

As measures against these problems, (a) the wind speed around the outdoor storage yard is reduced to reduce dust generation (reference art: Japanese Patent Laid-Open No. 58-59105), and (b) piles are piled up in the outdoor storage yard. To reduce dust generation by sprinkling water on the powder-mixed agglomerates, (c) To reduce dust generation by spraying a solidifying agent on the surface of the powder-mixed agglomerates piled up in the outdoor storage yard, etc. The method is generally known.

The above method (a) is performed as shown in FIG.
A net on the retaining walls 2a, 2b of the outdoor storage yard 1,
The windbreak fences 3a and 3b such as fences and fences are erected, and the windflow fence 2a on the windward side slows down the flow velocity of the passing wind 4.
By this, the flow velocity of the swirling flow of the wind generated in the wake of the windbreak fence 3a is further reduced to reduce the dust 6 flying up from the mountains 5a, 5b, 5c, and the windbreak fence 3b functions as a filter. The amount of dust flowing out to the urban area 7 side is reduced.

However, when the storage yard is large, it is necessary to dispose windproof fences such as nets, fences and fences over a wide area, which increases construction costs. Therefore, the net,
In many cases, windbreak fences such as fences and fences are made as low as possible, and the effect of reducing the flow velocity of the wind is small and the effect of collecting dust is also small, which is not sufficiently satisfactory.

[0006] In the methods (b) and (c), it is necessary to frequently spray the anti-scattering agent such as water and a solidifying agent, and when the storage yard is large, the work of spraying the anti-scattering agent is burdened. Large, it is necessary to use a large amount of anti-scattering agent, and the cost burden of the anti-scattering agent is large. In addition, when water is sprinkled, it is necessary to dry before use, and depending on the type of anti-scattering agent, it may cause deterioration of the quality of the stored agglomerate raw material, and it is practically used while having some problems. Is the current situation.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to the case where aggregates in which powders are mixed are piled up and stored in an outdoor storage yard.
While reducing dust flying up and scattering by the wind,
It is intended to provide a dust collection facility for an outdoor storage yard that can improve the efficiency of collecting dust that has risen and scattered, and can significantly reduce facility costs.

[0008]

The first invention of the present invention is as follows:
A mound with an inclined surface of 1 to 1.5 times the pile height is placed between a storage yard where piles of mixed granules are piled up and an urban area, and a net, fence, fence, etc. is placed on the surface of this mound. Is a facility for collecting scattered dust from an outdoor storage yard, which is characterized in that a through hole shield is provided, and a second invention is the first invention, wherein a water spray pipe is provided in the through hole shield. When attached, it is possible to form a water film on the simple shielding part and to wash the through-hole shield when the amount of scattered dust is large, to collect scattered dust from the outdoor storage yard. Equipment.

[0009]

In the present invention, a mound that can be formed at a low cost by, for example, a steelmaking by-product such as a blast furnace slag or a converter slag forms a path through which wind passes to increase the dust concentration of this path, and this dust high concentration region By arranging a through-hole shield such as a net, a fence, or a fence, the dust collection efficiency can be improved. In addition, since the area where the through-hole shield is erected is selected between the outdoor storage yard and the urban area, it is possible to select an installation location that does not hinder the operation. If a water pipe is attached to this through-hole shield to form a water film on the through-hole shield, the dust collection efficiency will be further improved, and this through-hole shield will be washed to remove the through-hole. It is possible to prevent clogging and maintain the function of the through hole shield for a long period of time.

The inventors of the present invention installed windproof fences, such as nets, fences, and fences, to prevent dust from flying up and scattering when piles of agglomerates mixed with powder were stored in an outdoor storage yard. Based on the above-mentioned conventional method of suppressing, in order to obtain a method that can collect dust flying up and scattering more efficiently and at low cost, repeat experiments, numerical analysis, create a wind path, and collect dust flying up Collect on the route,
The present invention has been completed based on the idea of collecting this highly concentrated dust in a narrow area.

In the present invention, as shown in FIG. 1, a mound 8 having an inclined surface 8t is formed between the outdoor storage yard 1 and the urban area 7, and a path for collecting the dust 6 and increasing the concentration is formed there. . For example, the wind 4 from the direction of the arrow causes dust 6 to fly up from the mountains 5a, 5b, and 5c of the storage yard 1 and scatter and fly along the wind to flow toward the mound 8. The dust gradually falls due to its own weight, but it is influenced by the slope 8t of the mound and rides in the upward flow of the airflow, and rises again.

Next, the ascending air current is directed to the slope 8 of the mound.
Since the flow of the air flow that tries to exceed t merges with each other one after another, the rising dust particles also continue to merge with each other toward the top of the mound to form a path having a high dust concentration.

Therefore, through-hole shields 9a, 9b, 9c such as nets, fences and net fences are erected on the dust high-concentration route formed on the inclined surface 8t and the top portion 8o of the mound 8,
The high density dust is collected by this through hole shield.

That is, according to the present invention, the dust 6 flying up from the outdoor storage yard 1 by the wind 4 and scattered is collected in a narrow path (region) by the mound 8 effect, and there is a through hole shield 9 there.
It is characterized in that a to 9c are installed upright to efficiently collect dust and reduce the amount of scattering to the city area 7. If this mound is too low, scattered dust will go over the mound and cannot be collected. If it is too high, the equipment cost will increase. Although the height H of the mound is determined in consideration of the topography of the construction site and the weather conditions, it is preferable that the height H of the mountain in the storage yard is in the range of 1 h to 1.5 h.

Further, if the slope of the slope of the mound is too gentle, the resistance to wind is small, the slope effect, that is, the effect of increasing the concentration of dust is small, and the collection efficiency is low. If the gradient is too steep, the wind flow will be greatly disturbed in front of the mound, and the dust will spread over a wide area, reducing the effect of increasing the dust concentration and reducing the collection efficiency. Considering this, it is desirable that the mound gradient θ be 20 to 30 degrees.

The location of the mound is determined in consideration of the storage object, storage conditions, distance to the city area, fluctuations in weather that greatly affect dust flying and scattering distance, and the like. For example, in the case of a storage yard that stores ore or coal, a sufficient effect can be obtained by disposing the storage yard at a position about 10 to 40 h (m) away from the final dust generation point (final mountain hem) of the storage yard. If it is too far, the mound's dust collection effect will be small, and the dust will land on a wide area, increasing the amount of re-scattering.

Although the width of the mounds is determined according to the area of the city, a plurality of mounds may be arranged side by side to secure the width of the mounds.

In this case, the air flow that has flown upwards by the mound forms a vortex in the wake of the mound, and the air flow is 5 to 1
Since it lands on the ground at the point of 5h (m), 5-15
It is effective to juxtapose at intervals of h (m) or more. Further, it is desirable that the mounds are arranged in a small range in terms of equipment cost, but if importance is attached to the collection efficiency, it is also considered to arrange a plurality of mounds in series from the storage yard toward the city area.

Next, the through-hole shield standing on the mound is
From the viewpoint of suppressing the diffusion of dust and improving the efficiency of collection, the porosity is 45
˜75% is preferable, and it is desirable that the mound is erected substantially at right angles to the slope and the top surface. Also, the higher the height, the greater the dust collection effect, but 0.1 to 0.2 h
(M) is sufficient. Further, the standing range of the through hole shield standing on the mound is the entire surface area on the side where the dust of the mound flies. When this through-hole shield is erected, it is desirable to arrange the through-hole shields in parallel so that the through-hole shield surfaces face the storage yard, and to arrange a plurality of them in series with the storage yard.

The through-hole shields 9a to 9c are shown in FIG.
If a sprinkler pipe 10 is attached as shown in FIG. 2 and the water film 11 can be formed continuously or intermittently in the through hole shielding part,
In addition to further improving the collection efficiency, the through hole shield can be washed to prevent clogging of the through hole, and the function of the through hole shield can be maintained for a long period of time.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below together with an example of equipment configuration for carrying out the present invention shown in FIG. This example is a case where the present invention is applied to an outdoor coal storage yard.
In FIG. 3, reference numeral 1 denotes an outdoor storage yard, in which lump-grained coal mixed with pulverized coal is piled up, and three piles of coal 5
a, 5b, 5c are formed at intervals of approximately 4h to 6h (m). 7 is an urban area, and between this urban area and the coal pile 5c of the storage yard 1, a blast furnace slag, a converter slag, and a mound 8 for embankment are arranged.

As shown in FIG. 4, a plurality of net fences (through hole shields) 9a to 9n provided with a water spray pipe 10 having a water spray hole 10o on the upper portion thereof are provided on the slope 8t and the top 8o of the mound 8. , The fence surface is erected so as to face the storage yard 1 side, and the sprinkler pipe 10 is connected to a water pipe (not shown), and water is sprinkled from the sprinkler pipe 10 by operating the valve of the water pipe. , Forming a water film 11 on the surface of the net fences 9a to 9n to improve the efficiency of collecting the scattered dust 6, and to perform unattended cleaning of the net fences 9a to 9n,
The clogging of the through hole is prevented and the function of this through hole shield is maintained.

In the present invention constructed as described above, the flow path of the dust 6 flying up from the coal mountains 5a to 5n of the storage yard 1 by the wind 4 and flying along the wind (air flow) in the direction of the mound 8, It can be formed so as to pass through the slope 8t of the mound, and the dust 6 scattered on the wind (air flow) 4 is collected (falls) by the net fences 9a to 9n standing on the mound 8. It is possible,
At the same time, the flow velocity of the wind (air flow) 4 can be reduced, so that the amount of dust 6 scattered to the city area 7 can be greatly reduced. If the amount of dust collected and accumulated by the mound and net fence increases and there is a risk of re-scattering, the collected dust is removed as necessary.

In this embodiment, the net fences 9a-9
Since the water sprinkling pipe 10 is arranged on the upper part of f to sprinkle water and form the water film 11 on the surface of the through-hole shield, the dust collection efficiency can be further improved. The present invention is not limited to this embodiment. For example, not only coal but also various ores can be applied as storage targets. Further, the mound is not limited to one group, and a plurality of mounds may be arranged depending on the direction, distance, etc. of the city, and may be arranged so as to have a dust collecting function in a plurality of directions. The through-hole shield is not limited to the net fence, but a similar effect can be obtained by using a fence or a tree.

As described above, the present invention is not limited to the above-mentioned embodiment, but may be changed depending on the storage object, the storage arrangement, the positional relationship (direction and distance) between the storage yard and the city area, the weather conditions, etc.
The arrangement, structure, scale, etc. of the equipment are changed within the range not exceeding the scopes of claims 1 and 2.

[0026]

According to the present invention, a mound that can be formed at a low cost by embankment forms a path through which the wind passes to increase the dust concentration of this path, and the high concentration area of dust has holes such as nets, fences, and fences. By erecting the shield, the dust collection efficiency can be improved. Moreover, since the area to be erected is selected between the outdoor storage yard and the urban area, the equipment cost can be significantly reduced. If a water pipe is attached to the through-hole shield to form a water film on the through-hole shield, the dust collection efficiency will be further improved, and the through-hole shield will be washed unattended. Can be prevented and the function of the through hole shield can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a side schematic explanatory view showing equipment and an example of arrangement thereof for explaining the concept of the configuration of the present invention.

FIG. 2 is a side schematic explanatory view showing an example of a through-hole shield used in the present invention and its action.

FIG. 3 is a schematic plan view showing an embodiment of the present invention, (b)
The figure is a schematic side view of FIG.

FIG. 4 is an enlarged schematic front view of the net fence in FIG.

FIG. 5 is a side enlarged schematic explanatory view showing an example of a known dust scattering countermeasure.

[Explanation of symbols]

 1: Outdoor storage yard 2a, 2b: Retaining wall 3a, 3b: Windbreak fence 4: Wind 5a-5c: Mountain 6: Dust 7: Urban area 8: Mound 8t: Front slope surface 8o: Top 9a-9n: Through hole Shield (net fence) 10: Sprinkler pipe 10o: Sprinkler hole 11: Water film

Claims (2)

[Claims] 1. A mound having an inclined surface formed at a height of 1 to 1.5 times the pile height is provided between a storage yard in which piles of mixed granules are piled outdoors and an urban area. , A facility for collecting scattered dust from an outdoor storage yard, characterized in that a through-hole shield such as a net, fence or fence is erected on the surface of this mound. 2. The facility for collecting scattered dust from an outdoor storage yard according to claim 1, wherein a sprinkler pipe is attached to the through hole shield.