JP2830760B2 - Coarse dust feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for pressure-feeding dust mixed with various particles of various sizes, which is collected by a suction-type recovery vehicle or the like for cleaning the inside of a plant for handling powder and granules such as an ironworks. Things.

[0002]

2. Description of the Related Art Dust collected from a wide range of places includes, in addition to bolts, waste cloth, welding rods and iron pieces, iron ore or alloy iron, coal, coke, and sintered ore having a diameter of about 40 to 50 mm. , Aluminum slag, etc.
Some particles have a particle size as small as 44 μm or less, such as dust collected, and furthermore, there are various types from dry to wet. Therefore, in order to receive such dust and transport it to a necessary processing step, receiving equipment and transport equipment suitable for each collected material are required.

For example, in the case of dry dust in which most of the particles have a particle size of 100 μm or less, and about 20% of a lump having a particle size of about 40 to 50 mm is mixed therein,
As shown in FIG. 5, a vibrating sieve 2 is
The vibrating sieve 2 is sieved and the lumps are conveyed to the next step by a belt conveyor 3, while the fine powder is conveyed to the next step by a closed type flow conveyor 4.

Further, as shown in FIG. 6, a wet-type vibrating sieve 5 is installed at a receiving port from a collection vehicle 1 and a vibrating sieve is used for the wet dust in which the fine powder and the lump are mixed. After washing and classification at 5, the lump is transported to the next step by the belt conveyor 3, while the fine powder is once put into the stirring tank 6 and stirred here, and then transported by pipe together with water via the pump 7. To the next process. 6a in FIG.
Denotes a stirrer, and 8 denotes a transportation pipe.

[0005]

As described above, conventionally, a wide variety of receiving facilities and transporting facilities are required depending on the nature of the dust to be recovered, and the cost of the facilities is increased. In addition, like the dust in the drainage of the washing cleaner on the belt conveyor,
In the case where the particle diameter is about several mm or less, and the dust concentration and the amount of drainage are constant and the purpose is simply to prevent the wear of the pump, the sludge pumping device proposed by the present applicant in Japanese Utility Model Application Laid-Open No. 4-89797 has been proposed. Although it is effective,
In the sludge pumping device proposed in No. 797, the particle size composition, specific gravity, etc., which are collected by the cleaning and collecting vehicle targeted by the present invention, vary and are not constant.
In addition, it cannot handle dust that needs to be adjusted for moisture or concentration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides not only dust having various particle sizes and specific gravities but also dust whose moisture and concentration need to be adjusted to a single facility. It is an object of the present invention to provide a coarse-grain dust pressure-feeding device capable of conveying to the next process.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a coarse-grain dust-feeding apparatus according to the present invention comprises a hopper for receiving dust and sieving a lump by a screen installed therein, A dissolving tank disposed below the discharge port of the dispenser and receiving the sieved dust sieved by the screen; and a dissolving tank for dissolving and mixing the sifted dust dropped into the dissolving tank with water filling the dissolving tank. A stirrer that stirs the water in the stirrer, a stirrer that receives and stores, via a gutter, fine dust dust that overflows with water from the dissolving tank among the sub-sieve dust that has been dissolved and mixed with water by the action of this stirrer; A stirrer that stirs the water containing the fine powder dust stored in the stirrer tank when necessary; A pressurizing tank arranged continuously with the discharge port of the dissolving tank to receive coarse dust falling along the wall surface, a pipe connecting the lower part of the pressurizing tank to the stirring tank, and an intervening partway along the pipe. Pressure pump, and the inflow port thereof is disposed so as to be located at a position corresponding to the discharge port of the pipe in the pressure feed tank, and the inside of the stirring tank discharged into the pressure feed tank via the pipe by driving the pressure pump. Equipped with a pumping pipe for pumping coarse dust deposited in the pumping tank by water containing fine dust,
A shut-off valve is provided at the connection between the dissolving tank and the pressure feed tank, and a circulation pump is provided in the middle of a pipe connecting the tanks so as to circulate the water containing the fine dust in the stirring tank to the dissolving tank. In addition, if necessary, the space including the outlet of the hopper and the upper part of the dissolving tank and leading to the inlet of the stirring tank is sealed with a cover integrated with a gutter, and the cover of the dissolving tank in this cover is closed. The position relative to the upper opening is
A partition plate is installed in a hanging manner to prevent the dust that floats and accumulates on the water surface filling the melting tank from overflowing into the gutter, and mixes the water with the sieve dust falling from the hopper and water. A spray that sprays water on the under-sieve dust is installed to assist, and a nozzle is formed at the discharge port of the pipe that guides the water containing fine dust in the stirring tank into the pressure feed tank, and the inlet of the pressure feed pipe For example, a shielding plate is formed near the inflow port to form a space in which coarse dust does not accumulate.

[0008]

In the coarse-grain dust pumping device according to the present invention, the dust is first sieved into lumps, iron pieces, and cloth by a hopper, and only the dust below the sieve falls into the melting tank. The dust under the sieve is dissolved and mixed in water in the dissolving tank, and the fine powder dust overflows from the dissolving tank together with the water and is guided into the stirring tank via a gutter. On the other hand, the coarse dust is brought to the wall surface of the melting tank, descends along the wall surface, and reaches the inside of the pressure feeding tank. When the water level in the stirring tank reaches a predetermined level,
Water containing fine dust in the stirring tank is discharged into the pressure feeding tank, and the coarse dust accumulated in the pressure feeding tank is transported through the pressure feeding pipe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coarse-grain dust pumping apparatus of the present invention is shown in FIGS.
A description will be given based on one embodiment shown in FIG. FIG. 1 is an overall schematic view of a coarse-grain dust pumping apparatus of the present invention, and FIG. 2 is an explanatory view of a melting tank which is one of the components of the coarse-grain dust pumping apparatus of the present invention. FIG. 3B is a front view, FIG. 3B is a diagram illustrating the state of dust in a similar melting tank, and FIG. 4 is a diagram illustrating components of the coarse-grain dust pumping apparatus of the present invention. FIG. 4 is a diagram illustrating a state of coarse dust in a pressure feeding tank, which is one of the above.

In FIG. 1 to FIG. 4, reference numeral 11 denotes a hopper for receiving dust discharged from, for example, a suction type dust collection vehicle for cleaning the inside of a steelworks. For example, lump or iron pieces or cloths such as iron ore having a diameter of 30 to 50 mm or more are sieved.
The diameter of the lump to be sieved by the screen 11a is determined by the inner diameter, the path, and the curvature of the pumping pipe 27 described later.

Reference numeral 12 denotes a dissolving tank which is disposed below the discharge port of the hopper 11 and receives the sieved dust sieved by the screen 11a. The inside of the dissolving tank 12 is, for example, supplied from a water source via a supply water supply pipe 13. Make-up water to be sent or water in which fine dust a is sent from a stirring tank 17 to be described later via a pipe 14 (hereinafter, “slurry water”)
That. ). The water in the dissolving tank 12 is stirred by the stirrer 15 and, at the same time, by the injection of the make-up water or slurry water, a concave vortex is formed on the water surface as shown in FIG. The sifted dust is drawn into the water. The under-sieve dust entrained in the water rapidly dissolves and mixes with the water in the dissolving tank 12, becomes familiar with the water, and starts swirling.

[0012] By the action of the stirrer 15, water and dissolution,
The fine dust a of the mixed undersize dust overflows from the dissolving tank 12 together with the water, flows down the gutter 16, and flows into the stirring tank 17. In the present embodiment, a space including the outlet of the hopper 11 and the upper part of the dissolving tank 12 and reaching the inlet of the stirring tank 17 is sealed with a cover 18 integrated with a gutter 16. Then, a partition plate 19 is vertically installed at a position relative to the upper opening of the dissolving tank 12 in the cover 18, and the dust a which floats and accumulates on the water surface in the dissolving tank 12 without being dissolved and mixed in water. ′ Is prevented from overflowing into the gutter 16. Further, in this embodiment, a spray 20 for spraying water on the under-sieved dust in order to assist the mixing of the under-sieved dust falling from the hopper 11 and water.
Is attached near the discharge port of the hopper 11 in the cover 18.

Reference numeral 21 denotes a stirrer for stirring the stored slurry water flowing into the stirring tank 17. The level of the slurry water stored while being stirred by the stirrer 21 is constantly detected by a level meter 22. . When the water level of the slurry water rises and reaches a predetermined level, the level gauge 22 is operated to drive a pressure feed pump 24 interposed in a pipe 23 connecting the stirring tank 17 and a pressure feed tank 25 described below. Then, the slurry water is pumped into the pumping tank 25.

Reference numeral 25 denotes a pressure feed tank arranged continuously with the discharge port of the melting tank 12, which receives and stores the coarse-grained dust b which is brought to the wall surface by the swirling motion and falls along the wall surface. . Reference numeral 26 denotes a shut-off valve provided at the connection between the melting tank 12 and the pressure feed tank 25. The shut-off valve 26 is in an open state while the coarse dust b is being received into the pressure feed tank 25. .

Reference numeral 27 denotes a pressure feed pipe whose inlet is located at a position corresponding to the discharge port of the pipe 23 in the pressure feed tank 25, and which is driven by the pressure feed pump 24 via the pipe 23. The coarse water dust b accumulated in the pressure feed tank 25 is fed to a predetermined location by the slurry water discharged into the inside. When the coarse-grain dust b is pressure-fed, when the pressure-feed pump 24 is driven, the shut-off valve 26 is closed and the pressure in the pressure-feed tank 25 is filled. In the present embodiment, a nozzle 23 a is formed at the discharge port of the pipe 23, and a shielding plate 29 that forms a space 28 where coarse-grained dust b does not accumulate near the inlet port is installed at the inlet port of the pressure feed pipe 27. And nozzle 23
The coarse dust b is floated and stirred in the space 28 by the slurry water discharged from a, so that the coarse dust b easily flows into the pressure feeding pipe 27.

When the water level in the stirring tank 17 decreases, the level gauge 22 operates to stop the pressure pump 24 and open the shutoff valve 26. By repeating the above operation a plurality of times, all the dust in the dust collection vehicle can be received. In FIG. 1, reference numeral 30 denotes both the tanks 17 and 12 for circulating the slurry water in the stirring tank 17 to the dissolving tank 12.
Is a circulating pump provided in the middle of a pipe 14 for connecting.

By the way, the dust discharged from the dust collection vehicle,
A 30 ton / H dust including quicklime powder, lump, aluminum lump, powder, dust collector dust, road cleaning dust, and ferroalloy lump is supplied to the coarse-grain dust pumping apparatus of the present invention having the structure shown in FIGS. : 100mm, pumping distance: 90
m, pumping pressure: 4 kg / cm ² , pumping flow rate: 60 m ³ / H), and only coarse dust having a particle size of ^{3 to} 40 mm (specific gravity: 1.5 to 6.5 ton / m ³ ) Was successfully pumped to the next step.

[0018]

As explained above, according to the coarse-grain dust pumping apparatus of the present invention, the dust is first sieved into a lump by the hopper, and only the dust below the sieve falls into the dissolving tank, and The fine powder dust overflows with the water from the dissolving tank and is guided into the stirring tank via a gutter, while the coarse dust is brought to the wall of the dissolving tank and moves along the wall. When the water level in the stirring tank reaches a predetermined level, the slurry water in the stirring tank is discharged into the pumping tank, and the coarse dust accumulated in the pumping tank is sent to the pumping pipe. Transport through a single facility, not only dust of various particle sizes and specific gravities, but also dust whose moisture and concentration need to be adjusted, in a single facility. Can be transported up to

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a coarse-grain dust pumping device of the present invention.

FIGS. 2A and 2B are explanatory views of a dissolving tank which is one of the components of the coarse-grain dust pumping device of the present invention, wherein FIG. 2A is a cross-sectional front view, and FIG. FIG.

FIG. 3 is a diagram illustrating the state of dust in a melting tank, which is one of the components of the coarse-grain dust pumping device of the present invention.

FIG. 4 is a diagram for explaining a state of coarse dust in a pressure feeding tank which is one of the components of the coarse dust pressure feeding device of the present invention.

FIG. 5 is an explanatory view of a conventional transportation means in the case of dry dust.

FIG. 6 is an explanatory view of a conventional transportation means in the case of wet dust.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hopper 11a Screen 12 Dissolution tank 14 Pipe 15 Stirrer 16 Gutter 17 Stirrer tank 18 Cover 19 Partition plate 20 Spray 21 Stirrer 23 Pipe 23a Nozzle 24 Pressure feed pump 25 Pressure feed tank 26 Shut-off valve 27 Pressure feed pipe 29 Shield plate 30 Circulation pump a Fine dust b Coarse dust

Claims (3)

(57) [Claims] 1. A hopper for receiving dust and sifting a lump with a screen mounted therein, a dissolving tank disposed below an outlet of the hopper, and for receiving under-sieved dust sieved by the screen. A stirrer that stirs the water in the dissolving tank to dissolve and mix the sub-sieve dust that has fallen into the dissolving tank with the water filling the dissolving tank; A stirring tank for receiving fine powder dust overflowing with water from the dissolving tank through a gutter and storing the fine powder dust, a stirrer for stirring the water containing the fine powder dust stored in the stirring tank when necessary, Continuously connected to the discharge port of the dissolution tank to receive coarse dust that is drawn to the wall surface and falls along the wall surface of the under-sieve dust mixed and mixed with water A pressure feed tank disposed therein, a pipe connecting the lower part of the pressure feed tank and the stirring tank, a pressure feed pump interposed in the middle of the pipe, and a flow pump in a position corresponding to a discharge port of the pipe in the pressure feed tank. An inlet pipe is arranged to position the inlet, and a pumping pipe for pumping coarse-grain dust deposited in the pumping tank by water containing fine dust in the stirring tank discharged into the pumping tank via the pipe by driving of the pumping pump. A shut-off valve is provided at the connection between the dissolving tank and the pressure feed tank, and a circulation pump is provided in the middle of the pipe connecting the tanks to circulate the water containing the fine powder dust in the stirring tank to the dissolving tank. A coarse-grain dust pumping device, wherein 2. A space including the discharge port of the hopper and the upper part of the dissolving tank and leading to the inlet of the stirring tank is hermetically sealed by a cover integrated with a gutter. A partition plate is installed in a hanging manner to prevent the dust that floats and accumulates on the water surface filling the melting tank from overflowing into the gutter, and mixes the water with the sieve dust falling from the hopper and water. 2. A coarse-grain dust pumping apparatus according to claim 1, further comprising a spray for spraying water on the under-sieved dust to assist. 3. A nozzle is formed at a discharge port of a pipe for guiding water containing fine powder dust in the stirring tank into the pumping tank, and coarse-grain dust is formed at an inlet of the pumping pipe near the inlet. 3. The apparatus for feeding coarse-grain dust according to claim 1, further comprising a shielding plate for forming a space in which no dust is accumulated.