JPH06257958A - High-temperature dismantled waste recovering device - Google Patents

Abstract

PURPOSE:To permit safe recovery by a method wherein dismantled waste, generated upon repairing a melting furnace and the like, is sucked by a sucking machine to recover it into an upper tank in a recovering unit and heavy waste blocks among the dismantled wastes are recovered into a lower tank while dust in light waste is collected and recovered by a collecting means. CONSTITUTION:Refractories, constituting the trough 3 of a molten pig iron passage connected to the tapping hole of a balst furnace 1, are dismantled and crushed by a dismantling machine upon periodical repairing. A sucking machine 19, loaded on a crawler truck 13, is run along the trough 3 to recover the dismantled wastes while the dismantled wastes and the like are sucked through a suction port by a vacuum force generated by a vacuum suction source interposed at the proper place of a suction pipe to shift them into a recovering unit 20 through a transporting pipe 19. In the recovering unit 20, the transported dismantled wastes are introduced into the upper tank 21 and light-weight dust is sucked by a cyclone, communicated with the upper tank 21 through a communicating pipe 37, to recover them while heavyweight waste blocks are dropped into a lower tank 22 to recover them.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a metal melting furnace, a blast furnace gutter,
The present invention relates to a high temperature demolition debris recovery device for recovering high temperature demolition debris such as refractories and slag generated when repairing tundish for steel making, ladle and the like.

[0002]

2. Description of the Related Art Generally, a tap iron gutter installed in a metallurgical furnace such as a blast furnace is regularly repaired because the wall surface constructed of refractory material is damaged. In the repair of the gutter refractory, large-scale heavy equipment such as a backhoe or Yumbo is used to excavate or chip the gutter refractory, and then the demolition debris is collected.

However, large heavy equipment such as a backhoe can collect large lumps of waste, but it is difficult to efficiently collect small and medium sized waste. For this reason, the operator removes the remaining small and small lumps of scrap by using a scoop or the like, but the working environment is accompanied by high temperature, a large amount of dust, and noise. As described above, since the dismantling waste collection processing work compels the worker to perform heavy-duty work in a poor environment with danger, various proposals have been made in the past for improving the work.

In Japanese Patent Publication No. 61-2722 and Japanese Patent Publication No. 59-43703, a dedicated rail is provided near the tap pipe, and a truck equipped with an air breaker and an industrial vacuum cleaner travels along the rail. An apparatus for collecting demolition debris while performing is disclosed. Japanese Examined Patent Publication No. 51-6084 discloses a recovery device using a breaker in combination with a Yumbo (bucket).

[0005]

However, the former recovery device only collects the dust generated when the gutter refractory is crushed, and has not yet reached the point where the heat lumps are recovered.

On the other hand, the latter collecting device can collect large lumps because it is of a bucket type, but dust and small and medium lumps of dust cannot be collected and remain, and these residues are removed by air blow cleaning. There is a need to.

The present invention has been made to solve the above problems, and provides a high-temperature demolition debris recovery device which can efficiently collect high-temperature demolition debris while maintaining a safe and hygienic working environment. The purpose is to do.

[0008]

A high-temperature demolition debris collecting apparatus according to the present invention comprises a suction device for sucking demolition debris and a collecting part communicating with the suction device. An upper tank to be introduced, a lower tank for collecting a mass of debris out of the demolition debris introduced to the upper tank, and a connecting portion between the upper tank and the lower tank, and the debris to the lower tank While discharging, an airtight valve for partitioning the upper and lower tanks from each other in an airtight manner, and a dust collecting means for capturing and recovering light weight dust among the demolition wastes introduced into the upper tank, To do.

It is preferable that a baffle plate is provided in the upper tank so that the lumps of waste collide with the baffle plate and drop below the tank. In particular, it is effective to install the baffle between the dust introduction port and the dust collection port. As the airtight valve, it is desirable to adopt a rotary seal valve or a flapper valve capable of continuously discharging a lump of waste. The lower tank should be water cooled. It is desirable that the suction machine has a link arm that swings the suction port, and this is mounted on a self-propelled carriage.

[0010]

In the high temperature demolition debris recovery device according to the present invention,
When the demolition debris is introduced into the upper tank, the debris mass equivalent to the weight of the demolition debris falls to the bottom of the upper tank, passes through the airtight valve, and further falls into the lower tank. On the other hand, light weight dust of the demolition waste is sucked and collected by the dust collecting means through the side opening of the upper tank.

Since the hot debris lump is quickly discharged from the upper tank to the lower tank, the heat exchange time between the suctioned atmosphere to the dust collecting means side and the high temperature debris lump is short, and the gas cooler on the downstream side. Also, the load on the vacuum blower is reduced. In particular, since the atmosphere inside the upper and lower tanks is shut off by the airtight valve, the thermal effect on the dust collecting means on the downstream side is small, even though the lumps of dust are hot, and the gas cooler and vacuum blower have a small capacity. Can be used.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

A tapping gutter 3 is provided at an appropriate position on the blast furnace casting floor 2 so that tapping can be performed from the tap hole of the blast furnace 1 to the gutter 3. The hot metal passage of the gutter 3 is constructed of refractory material, and slag is attached to it. Backhoe for regular repair of gutter 3
The gutter refractory is dismantled and crushed by a dismantling machine (not shown) such as a chisel and a rotary bit. The crushed refractory and slag have a maximum diameter of about 70 mm, and the temperature may reach up to about 800 ° C. depending on the cooling conditions.

As shown in FIG. 2, a suction device 10 is mounted on a crawler carriage 13 and is arranged so as to run along the gutter 3. The carriage 13 has a turning table, and the nozzle drive unit 14 is provided on the turning table. A link arm 15 extends from the nozzle drive unit 14, and its tip is connected to an appropriate position of the suction pipe 11. That is, the suction tube 1
1 is supported by a link arm 15, and by bending the link arm 15, the suction port 12 is guttered.
You can move around in it. The suction port 12 is
It has a protrusion for stirring and an opening, and is attached to the tip of the suction tube 11. A vacuum suction source (not shown) is provided at an appropriate position of the suction pipe 11. A crusher such as a rotary bit or a chisel may be attached to the tip of the suction pipe 11 and used together with the suction port 12.

The suction pipe 11 communicates with a transportation pipe 19 via a flexible heat resistant hose 17. The curved portions of the suction pipe 11 are connected by ball joints 16, respectively. Further, a rotary joint 18 is provided on the heat-resistant hose 17 side of the transport pipe 19. With the ball joint 16, the flexible heat-resistant hose 17, and the rotary joint 18, the trolley 1
3 and the link arm 15 can be moved with a certain degree of freedom.

The transport pipe 19 penetrates the inside of the blast furnace casting bed 2,
It extends toward the recovery unit 20. The main part of the recovery unit 20 is composed of upper and lower tanks 21 and 22, a cyclone 26, a gas cooler 28, and a vacuum blower 35. Suction machine 1
The high temperature demolition waste, the dust and the sucked air transported from 0 are first introduced into the upper tank 21. That is, the downstream end of the transport pipe 19 is the upper tank 2
The upper lid 1 is connected to the upper lid by a flange joint so that debris, dust and the like are introduced into the inside of the tank 21 from the upper portion.

As shown in FIG. 1, the upper tank 21 communicates with the cyclone 26 via a connecting pipe 37. A baffle plate 25 extends downward from the upper lid of the upper tank 21. The baffle plate 25 is provided between the demolition debris introduction port (the opening of the transport pipe 19) and the dust recovery port (the opening of the cyclone communication pipe 37), and collides and drops the debris mass equivalent to the weight of the demolition debris. It has a role of preventing the cyclone 26 from being mixed.

A discharge valve 27 is provided at the bottom of the cyclone 26 and is discharged to a dumping device (not shown). Further, the cyclone 26 communicates with the gas cooler 28 via the connecting pipe 38. Cyclone 2
A bag filter may be added on the downstream side of 6 to improve dust collection efficiency.

The gas cooler 28 has a large number of heat transfer tubes,
Cooling water is supplied to these heat transfer pipes through a water supply pipe 29,
It is designed to exchange heat between gas and water. Further, the gas cooler 28 communicates with the suction side of the vacuum blower 35 via the communication pipe 34. The exhaust pipe 36 of the vacuum blower 35 is open to the atmosphere. The temperature sensor 39
Are attached to the upper lids of the upper tank 21 and the gas cooler 28, respectively. Further, the transport pipe 19 and the communication pipe 34 are provided with damper-equipped air intake pipes 51, respectively.

The lower tank 22 is provided directly below the upper tank 21. An airtight valve 23 is provided at the connecting portion between the upper and lower tanks 21 and 22. A continuous discharge valve such as a rotary seal valve or a flapper valve is used as the airtight valve 23. Such an airtight valve 23 has a function of continuously discharging a lump of waste from the upper tank 21 to the lower tank 22 in a state where the internal atmospheres of the upper and lower tanks 21 and 22 are blocked from each other. That is, when the lump of dust enters the recess provided in the peripheral portion of the airtight valve 23 and is rotated about the horizontal axis, the lump of dust falls into the lower tank 22. At this time, the airtight valve 23
Since the peripheral portion and the tank connecting portion slide in close contact with each other, the tank connecting portion is well sealed, and the upper tank 21 and the lower tank 22 are maintained in an independent internal atmosphere that does not affect each other.

The dumping device 40 is used for the discharge valve 2 of the lower tank 22.
It is provided directly under 4. As the dumping device 40, a slag pan 41 mounted on a moving carriage 42 is used. A container bag may be used instead of the slag pan 41. The moving carriage 42 is towed by a towing vehicle on the rail 4 and is moved to the dumping area. The drive source and operating method of each device will be described.

The suction device 10 is driven by hydraulic pressure (diesel) or the like, and a telecontrol operation system is adopted. The airtight valve 23, the discharge valves 24 and 27, the gas cooler 28, and the blower 35 of the recovery unit 20 are electrically operated, and are automatically operated by a signal sent from the suction device 10. Further, a temperature sensor 39 is provided at the inlet of the upper tank 21 and the inlet of the gas cooler 28 so that the automatic watering or the cooling atmosphere can be sucked if the detected temperature is too high to protect the device. The cooling system will be described.

A large amount of cooling water is supplied to the heat transfer tube of the gas cooler 28 from a cooling water source (not shown). The cooling water after the heat exchange enters the water cooling jacket 31 of the lower tank 22 through the connecting pipe 30 in the lower part of the cooler 28, circulates the entire circumference of the lower tank 22, and then is drained to the drain groove 33 through the drain pipe 32. It Since the water cooling jacket 31 covers almost the entire circumference of the lower tank 22, the high-temperature waste lump 5 accommodated therein is cooled. The transportation of demolition waste will be described.

The gutter refractory is finely crushed by a crusher. The maximum diameter of crushed demolition debris is about 70 mm. The trolley | bogie 13 is run while rocking the suction pipe 11 with the link arm 15, and the demolition debris in a trough is sucked one by one through the suction port 12. The demolition waste is introduced into the upper tank 21 through the suction pipe 11, the heat-resistant hose 17, and the transportation pipe 19. The transportation speed of demolition debris is about 50 m / s when the diameter of the debris is 70 mm, and in the normal case, demolition debris is sucked from the suction port 12 to the upper tank 2
The time required to arrive by 1 is several seconds. Since the demolition debris arrives at the upper tank 22 quickly in this way, the heat exchange rate between the demolition debris and the suction atmosphere during transportation is low, and the gas temperature does not rise so much. Separation of demolition debris will be described.

When the demolition debris is introduced into the upper tank 22, light weight dust and the like is sucked into the cyclone 26, and the heavy debris is discharged to the lower tank 22 through the airtight valve 23. At this time, the hot debris is quickly discharged out of the suction system of the upper tank 21, and the gas after solid-gas separation by the cyclone 26 is at a relatively low temperature, so that the gas cooler 28 and the vacuum blower 35 are reduced in size and capacity. It will be possible.
The separated gas is finally cooled to 60 ° C. by the gas cooler 28.

Usually, in the case of sucking a high-temperature powder mass, secondary air may be taken into the suction system for cooling, or cooling water may be sprayed at the suction port. If this is done, the amount of gas will increase significantly. However, in this embodiment, solid-gas separation can be performed at an early stage during suction,
The thermal expansion of the suction gas is small and the gas cooler 28 on the downstream side
Also, the capacity and capacity of the vacuum blower 35 can be reduced. Further, since the temperature of the separated gas is low, the heat load on each device is alleviated.

The waste lumps 5 enter the recesses provided in the peripheral portion of the airtight valve 23, and when the waste lumps 5 are rotated around the horizontal axis, the waste lumps 5 fall into the lower tank 22. In this way, when the waste block 5 is continuously discharged from the upper tank 21 to the lower tank 22 by the airtight valve 23, since the peripheral portion of the airtight valve 23 and the tank connecting portion slide in close contact with each other, the tank connecting portion is well sealed. The upper tank 21 and the lower tank 22 are maintained in independent internal atmospheres that do not affect each other.

After cooling the waste lumps 5 in the lower tank 22, the tank discharge valve 24 is opened to discharge the waste lumps 5 to the slag pan 41. Since the waste mass 5 is cooled to a low temperature range and the upper and lower tanks 21 and 22 are shut off by the airtight valve 23, the amount of dust generated when discharging the waste mass becomes relatively small.

[0029]

According to the present invention, the work of collecting and disposing of the high temperature demolition waste is mechanized, so that the worker can be relieved of the heavy labor in a bad environment with danger. Further, according to the present invention, it is possible to quickly and easily collect both the lumps of dust and the dust, so that it is possible to significantly reduce the cost of disassembling the refractory.

According to the apparatus of the present invention, since the high-temperature slag mass can be separated from the suction gas in the initial stage during suction, the amount of suction gas increased by thermal expansion is small, and the dust collecting means on the downstream side is small. It is possible to reduce the capacity and capacity of auxiliary equipment. In particular, since the upper and lower tanks are shut off by the airtight valve, the heat influence of the retained heat of the waste lump on the downstream side dust collecting equipment is small, and a small-sized and small-capacity gas cooling device and suction device can be used. Therefore, the device can be downsized as a whole. Further, since the temperature of the separated gas is low, the heat load on each device is alleviated and the life of the device can be extended.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of a high temperature demolition debris recovery device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an overall outline of a high temperature demolition debris recovery device according to an embodiment of the present invention.

[Explanation of symbols]

10 ... Suction machine, 20 ... Collection part, 21 ... Upper tank, 22
… Lower tank, 23… Airtight valve, 26… Cyclone, 28
… Gas cooler, 35… Vacuum blower, 40… Dumping device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000004123 Nippon Steel Pipe Co., Ltd. 1-2-1, Marunouchi, Chiyoda-ku, Tokyo (71) Applicant 391022326 Diamond Engineering Co., Ltd. 1-31-10, Taito, Taito-ku, Tokyo ( 72) Inventor Kazuo Ito 2-3-2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Within Kawasaki Steel Co., Ltd. (72) Inventor Junichi Furuya 2-3-2 Uchisaiwai-cho, Chiyoda-ku, Tokyo Within Kawasaki Steel Works (72) ) Inventor Jun Kondo 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries, Ltd. Wakayama Steel Works (72) Inventor Keiho Katakishi 1850 Minato, Wakayama City, Wakayama Sumitomo Metal Industries Ltd. (72) Inventor Shigeichi Miki 2 Nadahamahigashi-cho, Nada-ku, Kobe-shi, Hyogo Stock company Kobe Steel Works Kobe Steel Works (72) Invention Author Toshitake Okada 1 Kanazawa-machi, Kakogawa-shi, Hyogo Prefecture Kadogawa Works, Kakogawa Works (72) Inventor Mitsuyuki Shin Tamura 1-2-1, Marunouchi, Chiyoda-ku, Tokyo (72) Invention Person Hiroshi Nakatani 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd. (72) Inventor Masaaki Sakurai 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd. (72) Inventor Hotta Kazuhiro 1-31-10 Taito, Taito-ku, Tokyo Diamond Engineering Co., Ltd.

Claims (1)

[Claims] 1. A suction device for sucking demolition debris, and a recovery unit communicating with the suction device, wherein the recovery unit includes an upper tank into which demolition debris is introduced, and a demolition device introduced into the upper tank. A lower tank for collecting a mass of debris out of the debris and a connecting portion between the upper tank and the lower tank, which discharges the debris to the lower tank, while airtightly partitioning the upper and lower tanks from each other. A high-temperature demolition debris recovery device comprising: a valve; and a dust collecting unit that captures and recovers light weight dust from the demolition debris introduced into the upper tank.