JP2016078932A - Solidified object crusher in storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solidified object crusher in a storage tank capable of maintaining storage capability of the storage tank in higher order, by preventing solidification of powder over the whole storage tank area.SOLUTION: A device suspended in a storage tank 20 and crushing a solidified object 21 formed by fixing powder stored in the storage tank 20, comprises an air breaker 11 for impacting and crushing the solidified object 21, a weight 12 mounted on the air breaker 11 and suspension means 13 for suspending the air breaker 11. The suspension means 13 comprises three or more of wire rods 14 extending in a radial shape from the air breaker 11 and a winding device 15 for winding the respective wire rods 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a storage tank solidified product crushing apparatus for crushing a solidified product formed by adhering powder stored in a storage tank.

Storage processes such as hoppers and silos are used in processes that handle large quantities of powder, such as steelmaking and cement manufacturing processes in the steel industry, because the powder needs to be temporarily stored.
The powder in the vicinity of the inner wall of the storage tank is pressed against the inner wall by the powder pressure, and the friction between the powder particles and the wall surface is increased, making it difficult to slip. Therefore, as shown in FIG. 4, only the powder (discharge layer) directly above the discharge port is discharged first. Then, it gradually collapses from the powder around the discharge layer and flows down. Such a flow is called “funnel flow”. In the funnel flow, a powder residual layer is formed in the tapered portion at the bottom of the storage tank. Since the residual layer is not replaced with a new powder, a solidified layer to which the powder is fixed is formed.

  When the solidified layer formed in the storage tank grows, the storage capacity of the storage tank decreases and it becomes difficult to stably and quantitatively extract the powder in the storage tank, which adversely affects the production process. There is a case. For this reason, after a sufficient safety measure has been taken by building a scaffold in the storage tank, solidified material removal work has been performed manually using a scoop or breaker. However, the work of removing the solidified material by human power requires a lot of labor and time, and therefore, a method for efficiently removing the solidified material in the storage tank in a short time has been desired.

Therefore, in Patent Document 1, a pipe for air blowing penetrating the wall of the bottom of the storage tank is provided, and solidification of the granular material (powder) is performed by the impact of air ejected from the air outlet at the tip of the air blowing pipe. An invention of an apparatus for preventing and discharging a granular material easily is disclosed.
Moreover, in patent document 2, invention of the apparatus which discharge | emits easily the granular material adhering to the inner wall of a storage tank by moving up and down the scraping jig extended below along the inner wall of a storage tank is disclosed. .

Utility Model Registration No. 3121183 Japanese Utility Model Publication No. 53-121684

  However, in the case of the devices described in Patent Document 1 and Patent Document 2, solidification of the powder around the air blowing location and the scraping jig can be prevented. It is difficult to prevent solidification. If a pipe for blowing air and a scraping jig are provided over the entire storage tank, the storage amount is reduced.

  Iron ore in recent years has a large amount of fine particles with particles having a mesh size of under 0.5 mm of 20% by mass or more. Moreover, there are many things whose water | moisture content is 3 mass% or more, and it is easy to solidify in a storage tank. When the apparatus described in Patent Document 1 or Patent Document 2 is applied to such a storage tank for storing iron ore, solidification of iron ore occurs at a site different from the air blowing location or the scraping location, and air blowing gradually. Solidification of iron ore proceeds so as to surround places and scrapes. Once the iron ore has solidified, it is difficult to remove the iron ore even if the air blowing location or the scraping location is changed, and it is not easy to restore the storage capacity of the storage tank.

  The present invention has been made in view of such circumstances, and provides a solidified substance crushing apparatus in a storage tank that can prevent solidification of powder over the entire storage tank and maintain the storage capacity of the storage tank at a high level. The purpose is to do.

In order to achieve the above-mentioned object, the present invention is an apparatus for crushing a solidified product that is suspended in a storage tank and fixed by powder stored in the storage tank.
An air breaker that hits and crushes the solidified material, a weight mounted on the air breaker, and a suspension unit that suspends the air breaker are provided.

  In the present invention, not only can the air breaker be moved to an arbitrary position in the storage tank by the suspension means for suspending the air breaker to crush the solidified material at the position, but an operator can enter the storage tank. Since the solidified product is crushed by remote control, it is not necessary to build a scaffold in the storage tank, and the solidified product can be efficiently removed in a short time.

  Moreover, in the solidified substance crushing apparatus in the storage tank according to the present invention, the suspension means may include three or more wires extending radially from the air breaker, and a winding device that winds up the wires. Good.

  In the said structure, an air breaker can be easily moved to the arbitrary positions in a storage tank by adjusting the length of each wire extended radially from an air breaker with a winding device.

  In the solidified substance crushing apparatus in the storage tank according to the present invention, the air breaker is moved to an arbitrary position in the storage tank by the suspension means for suspending the air breaker, and the solidified substance at the position is crushed. The solidification of the powder over the range can be prevented, and the storage capacity of the storage tank can be maintained at a high level.

It is a schematic diagram of the air breaker and weight which comprise the solidified substance crushing apparatus in the storage tank which concerns on one embodiment of this invention. It is sectional drawing which looked at the solidified substance crushing apparatus in the storage tank suspended in the storage tank from the side. It is the top view which looked at the solidified substance crushing apparatus in the storage tank suspended in the storage tank from the upper direction. It is a conceptual diagram of the funnel flow which generate | occur | produces in a storage tank.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

The storage tank solidified substance crushing device 10 according to the embodiment of the present invention includes an air breaker 11 that crushes a solidified substance 21 formed by fixing powder stored in the storage tank 20, and an air breaker 11. A weight 12 and a suspension means 13 for suspending the air breaker 11 are provided (see FIGS. 1 to 3).
In addition, as a magnitude | size of the storage tank 20 in which the solidified substance crushing apparatus 10 in a storage tank is suspended inside, it is about 1m-10m in width, and about 3m-20m in height from the top part to the discharge port 22. FIG. Since a device (not shown) for supplying powder to the storage tank 20 is connected to the uppermost part of the storage tank 20, the storage tank 20 is not sealed and the upper surface is open to the atmosphere. Therefore, the powder in the storage tank 20 is likely to be fixed by absorbing rain and moisture in the atmosphere.

  The air breaker 11 drives a piston (not shown) provided inside the breaker body 16 with the pressure of compressed gas such as compressed air supplied into the breaker body 16 via the pipe 18, and this piston is the breaker. By hitting the chisel 17 provided at the front end side of the main body 16, the chisel 17 reciprocates, and the front end portion of the chisel 17 hits and crushes the solidified material 21.

A weight 12 is mounted on the rear end of the air breaker 11 in order to keep the chisel 17 vertical to prevent the impact direction from deviating and to resist reaction caused by impact.
Since the air breaker 11 has a structure that gives the driving force to the chisel 17, the increase in mass due to the air breaker 11 having the weight 12 is almost equal to the striking force for crushing the solidified material 21. Does not affect.

The suspension means 13 includes three or more wire rods 14 (four in this embodiment) extending radially from the air breaker 11, and a winding device 15 (four in this embodiment) that winds up each wire 14. It has. The angles between the wire 14 and the wire 14 are substantially equal.
A wire, a chain, etc. can be used for the wire 14. If three or more wires 14 extend radially from the air breaker 11, the air breaker 11 can be positioned. If there are four or more wires 14, the air breaker 11 can be positioned more easily. Alternatively, five or more wires 14 may be used, four may be used for positioning, and the remaining wire 14 may be used as a complement when cutting the wire 14.
The winding device 15 is installed at each corner of the top of the storage tank 20 so that the wire 14 extends radially from the air breaker 11 (see FIGS. 2 and 3).

Next, the method of crushing the solidified material 21 in the storage tank 20 using the solidified substance crushing apparatus 10 in the storage tank according to the present embodiment will be described.
(1) When the storage tank 20 is viewed from above, the winding device 15 is installed on the top of the storage tank 20 so that each wire 14 extends radially from the air breaker 11. The number of winding devices 15 is three or more in accordance with the number of wires 14.
(2) A starting end portion of each wire 14 is attached to the weight 12 mounted on the rear end portion of the air breaker 11.

(3) Each winding device 15 is operated to move the air breaker 11 to a predetermined position in the storage tank 20.
(4) Compressed gas is supplied to the air breaker 11 via the pipe 18 to crush the solidified material 21 immediately below the air breaker 11.

(5) When the above operation is completed, each winding device 15 is operated to move the air breaker 11 to another position, and the operation (4) is performed.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included.

The solidified material crushing apparatus in the storage tank according to one embodiment of the present invention was applied to the work of removing deposits (solidified material) in the raw material tank (storage tank) used in the ironmaking process of the steel industry. The dimensions of the raw material tank are 7,000 mm × 7,000 mm × 12,700 mm.
The raw material stored in the raw material tank is a powder in which particles having a mesh size of 0.5 mm or less are 20% by mass or more and water content is 3% by mass or more.
The power source of the air breaker was compressed air, and an air breaker having a rated output of 30 horsepower was used. The weight of the weight was 50 kg, and the number of wires (wires) was four.

  As a result, the deposit removal work, which conventionally took about 7 hours with 8 workers, was completed in about 3.5 hours with 4 workers.

10: Solidified substance crushing device in storage tank, 11: Air breaker, 12: Weight, 13: Suspension means, 14: Wire rod, 15: Winding device, 16: Breaker body, 17: Chisel, 18: Piping, 20: Storage tank, 21: Solidified product, 22: Discharge port

Claims (2)

A device that hangs in a storage tank and crushes a solidified product formed by fixing powder stored in the storage tank,
A solidified substance crushing device in a storage tank, comprising: an air breaker for hitting and crushing the solidified substance; a weight mounted on the air breaker; and a suspension means for hanging the air breaker.   The solidified material crushing device in a storage tank according to claim 1, wherein the suspension means includes three or more wires extending radially from the air breaker, and a winding device for winding the wires. A storage tank solidified material crushing device.

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