JP7442244B1 - Coal-based recovered material collection equipment and suction work vehicle - Google Patents

Abstract

An object of the present invention is to provide a recovery device and a suction work vehicle for coal-based recovered materials that suppress dust generation during discharge and improve the reuse rate of coal-based recovered materials stored in a receiver tank.
[Solution] A coal-based recovery material 100 is sucked through a suction unit 300 using a suction device 4, and a receiver tank 31 that accommodates the sucked coal-based recovery material 200 is connected to the receiver tank 31. a filter 90 that collects unrecovered coal-based recovered material 200 that was not accommodated in the receiver tank 31; Water is added to the coal-based recovered material 100 so that the moisture content of the recovered material 200 is more than 2% by weight and less than 20% by weight.
[Selection diagram] Figure 1

Description

Application of Article 30, Paragraph 2 of the Patent Act On December 13, 2020, Jewel Oil Kiko Co., Ltd. carried out work at the Nagoya Works of Nippon Steel Corporation using a suction work vehicle equipped with a recovery device for coal-based recovered materials. I did it.

The present disclosure relates to a recovery device for coal-based recovered materials and a suction work vehicle.

Conventionally, a suction device that uses a suction hose to suck up recovered material at a suction work site and stores it in a receiver tank, a plurality of sensors that monitor the status of the suction work, and a suction device connected to the sensors and the suction device, and There has been a suction work vehicle that is equipped with an operating device that operates the device, and a remote operating device that can communicate remotely with the operating device, and that the suction operation is stopped by shaking the remote operating device ( (See Patent Document 1 below).

JP2021-75247A

Patent Document 1 does not disclose a collection device that suppresses dust generation during discharge and improves the reuse rate of coal-based recovered material stored in a receiver tank, and a suction work vehicle equipped with the collection device. Ta.

The present disclosure discloses a technology for solving the above-mentioned problems, which suppresses dust generation during discharge and improves the reuse rate of coal-based recovered materials stored in a receiver tank. An object of the present invention is to provide a recovery device for system recovered materials and a suction work vehicle equipped with the recovery device.

The recovery device for coal-based recovered materials according to the present disclosure includes:
A receiver tank that sucks coal-based recovered materials through a suction unit using a suction device and stores the sucked coal-based recovered materials;
A coal-based recovered material collection device comprising: a filter connected to the receiver tank to collect the uncollected coal-based recovered material that was not stored inside the receiver tank,
The suction section is provided with a water adder, and the water adder is configured to cool the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is greater than 2% by weight and equal to or less than 20% by weight. It is used to add water.
A suction work vehicle according to the present disclosure is equipped with the recovery device for coal-based recovered materials.

According to the coal-based recovered material collection device and suction work vehicle of the present disclosure, it is possible to suppress dust generation during discharge and to improve the reuse rate of the coal-based recovered material stored in the receiver tank.

FIG. 1 is a schematic configuration diagram showing a recovery device for coal-based recovered materials according to an embodiment. FIG. 2 is an enlarged configuration diagram of a receiver tank of a recovery device for coal-based recovered materials according to an embodiment. It is a figure which shows the opening and closing state of the valve at the time of the wet suction, the semi-dry suction, and the time of the pumping of the recovered material by the recovery device for coal-based recovered material according to the embodiment. FIG. 4A is a diagram showing an example of a spray type water adder according to the embodiment, and FIG. 4B is a diagram showing an example of a spray type water adder according to the embodiment. FIG. 2 is a diagram showing a state in which a chain is attached as an example of a mechanism for homogenizing and dispersing coal-based recovered materials according to an embodiment. FIG. 3 is a diagram illustrating the function of a chain that is an equalization and dispersion mechanism in the suction work vehicle according to the embodiment. 7A and 7B are a plan view and a side half-sectional view showing a rupture disc provided in a receiver tank according to an embodiment. 8A is a schematic perspective view showing the filter, FIG. 8B is a schematic cross-sectional view of a portion C in FIG. 8A, and FIG. 8C is a schematic diagram showing the configuration of a filter according to an embodiment. It is a figure showing how it is collected by. FIG. 3 is a diagram illustrating the difference in effects between semi-dry suction operation and wet suction operation according to the embodiment.

[Purpose of this disclosure]
In steelworks coke ovens, coal dust generated from the furnace body, conveyor, etc. is collected by a dust collector. A suction work vehicle is used to collect coal dust collected by the dust collector (hereinafter referred to as coal-based collected material). This suction work vehicle is equipped with a recovery device that uses a suction hose to suck up coal-based recovered materials and stores them in a receiver tank as coal-based recovered materials. Further, the suction work vehicle is equipped with a catcher and a filter for collecting particulate matter that cannot be collected in the receiver tank.

When collecting coal dust (coal-based materials to be collected) using a suction work vehicle having such a configuration, dust is generated and causes environmental pollution. Since the coal dust collected by the above-mentioned dust collector (coal-based collected material) has a water content of approximately 2% by weight or less, for example, dust is likely to be generated. In order to prevent this, it is possible to add water to the coal-based materials to be collected. As a result of experiments conducted by the inventor, dust generation was suppressed by increasing the ratio of the coal-based recovered material to water to 3:7, but the added water and coal-based recovered material did not mix uniformly, and the receiver There was a problem in that the reuse rate of the coal-based recovered material stored in the tank did not increase.

In addition, when coal-based recovered material with a high moisture content is stored inside the receiver tank, approximately 1/4 of the coal-based recovered material will stick inside the receiver tank, and it is necessary to manually remove the stuck material to the outside. Ta. Furthermore, bag filters were generally used to collect unrecovered powder and granules that were discharged from the receiver tank and could not be collected by a catcher, etc., but when collecting coal-based materials with high moisture content, There was a problem that the bag filter stuck to the filter cloth and the suction power was extremely reduced.
The present disclosure has been made to solve the above problems, and embodiments of the present disclosure will be described in detail below.

[Description of embodiment]
(Configuration of recovery device for coal-based recovered materials)
FIG. 1 is a schematic configuration diagram showing a recovery device for coal-based recovered materials according to an embodiment, and FIG. 2 is an enlarged configuration diagram of a receiver tank of the recovery device for coal-based recovered materials according to an embodiment.
Note that, as shown in FIG. 6, which will be described later, in this embodiment, the coal-based recovery material recovery apparatus 1000 is mounted on a suction work vehicle 2000.

First, referring to FIG. 1, the overall configuration of a recovery apparatus for coal-based recovered materials according to an embodiment will be described.
As shown in the figure, the recovery device 1000 includes a suction hose 2 that sucks a coal-based recovered material 100 (hereinafter referred to as the recovered material 100), a suction port 310 to which the suction hose 2 is connected, and a suction hose 2. Alternatively, a water adder 5 installed at the suction port 310, a receiver tank 31 that stores the coal-based recovered material 200 (hereinafter referred to as recovered material 200) sucked through the suction hose 2 and the suction port 310, and a receiver tank A secondary catcher 32 arranged after the secondary catcher 31 and connected by the pipe L1, a tertiary catcher 33 arranged after the secondary catcher 32 and connected by the pipes L20, L21, L22, L23, and L25, and a secondary catcher. 32 and the tertiary catcher 33, and the suction device 4 (the blower first stage 41 which is arranged after the tertiary catcher 33 and connected by the piping L3). and a second stage blower 42), and a quaternary catcher 34 arranged after the suction device 4 and connected by a pipe L5. The quaternary catcher 34 is provided with an opening 34a to discharge gas components.
In addition, in this embodiment, the suction hose 2 and the suction port 310 are collectively referred to as the suction section 300.

As described above, the suction section 300 (the suction hose 2 or the suction port 310) is equipped with the water adder 5, which applies a predetermined amount of moisture to the collected object 100 to be suctioned, as will be described later.
A first filter device 71 and a second filter device 72 are installed between the secondary catcher 32 and the tertiary catcher 33. body, etc.).

Next, referring to FIG. 2, the configuration of the receiver tank of the recovery device will be described.
As shown in the figure, the receiver tank 31 includes a main body 311 and a lid 312, and the lid 312 opens and closes upward about a fulcrum 312A.
When discharging the recovered material 200 accumulated in the receiver tank 31, open the lid 312, lift the side of the main body 311 that is not the lid side (the left side in FIG. 2) using a cylinder (not shown), and tilt the receiver tank 31. Then, the collected material 200 is discharged.

The suction hose 2 is connected to a suction port 310 of the lid portion 312, and the suction port 310 is provided with a suction valve V01. The collected material 200 sucked from the suction hose 2 and the suction port 310 collides with the contact plate 330 and then collides with the plurality of metal chains 7 and is deposited uniformly and dispersedly at the bottom of the receiver tank 31. . As will be described later, the plurality of chains 7 will be referred to as a mechanism for uniformly dispersing the collected material 200.
When the specific gravity of the collected material 200 is light, without the chain 7 as a uniform dispersion mechanism, it tends to be deposited biased toward the front side of the receiver tank 31 (left side in FIG. 2). By hanging the chain 7 as a uniform dispersion mechanism, it can function as a baffle plate.

Moreover, the lid part 312 has a discharge port 320 for discharging the collected material 200 inside the receiver tank 31 to the outside of the receiver tank 31, and the discharge port 320 is provided with a valve V02.
Furthermore, the receiver tank 31 is equipped with a full ball 340 and a rupture disc 6.

Returning to FIG. 1, the overall configuration of the collection device will be described.
The secondary catcher 32 is connected to the downstream side of the receiver tank 31 via a pipe L1. A valve V1 is provided in the pipe L1. A pipe L11 that connects to the downstream side of the second stage blower 42 branches from the pipe L1, and a valve V2 is provided in the pipe L11.
The secondary catcher 32 is composed of a cyclone type dust collector, and captures fine solid matter that is not collected in the receiver tank 31.

As described later, a first filter device 71 and a second filter device 72 are installed between the secondary catcher 32 and the tertiary catcher 33 to remove coal-based recovered materials (powder and granules) that are not collected by the secondary catcher 32. ) is collected.

A tertiary catcher 33 is connected to the downstream side of the secondary catcher 32, the first filter device 71, and the second filter device 72 via a pipe L25. The tertiary catcher 33 is connected to the blower first stage 41 via a pipe L3, and further connected to the blower second stage 42 via a pipe L4. The blower second stage 42 is connected to the quaternary catcher 34 via the piping L5 and the discharge silencer S1, and gas components are discharged from the open port 34a of the quaternary catcher 34.

The tertiary catcher 33 consists of a wet dust collection tank and stores a predetermined amount of water. Air from the pipe L25 is blown onto the water in the tertiary catcher 33, and fine solids not captured by the secondary catcher 32 are captured.

The first stage blower 41 is connected to the downstream side of the tertiary catcher 33 via a pipe L3. The second blower stage 42 is connected to the downstream side of the first blower stage 41 via a pipe L4. A pipe L41 that connects to a pipe L5, which will be described later, branches off from the pipe L4, and the pipe L41 is provided with a check valve NRV.
The first-stage blower 41 and the second-stage blower 42 are driven by the drive engine of the suction work vehicle 2000, other engines, power sources, and the like.

The quaternary catcher 34 is connected to the downstream side of the second stage blower 42 via a pipe L5. A valve V3 is provided in the pipe L5. The piping L5 is connected to the pressure breaker PB at two locations, upstream and downstream of the valve V3, and is released to the atmosphere when the pressure becomes higher than a predetermined pressure.

The 4th catcher 34 is a wet dust collection tank, stores a predetermined amount of water, and captures fine solid matter not captured by the tertiary catcher 33.
The quaternary catcher 34 has an open port 34a, and the air sent from the second stage blower 42 is discharged from the open port 34a.
A pipe L5 connected to the quaternary catcher 34 is provided with a discharge silencer S1 for reducing exhaust noise.

(Explanation of operation of collection device)
Next, a suction operation by the collection device of this embodiment will be explained.
The recovery device of this embodiment can select either a semi-dry suction operation or a wet suction operation.
Here, the semi-dry suction operation refers to adding water to the collected material from a water adder provided in the suction section so that the moisture content of the collected material stored in the receiver tank is more than 2% by weight and less than 20% by weight. This refers to the action of suctioning the object to be collected.
In addition, wet suction operation means that the collected material is sucked while adding water to the collected material from a water adder provided in the suction unit so that the moisture content of the collected material stored in the receiver tank becomes more than 20% by weight. It refers to the action of
In this embodiment, the semi-dry suction operation is the main suction operation, and the wet suction operation is the auxiliary suction operation.

Hereinafter, a wet suction operation and a semi-dry suction operation by the recovery device of this embodiment will be explained. In addition, the operation of pumping coal-based recovered material and the flow of cooling water will also be explained.
Here, FIG. 3 is a diagram showing the opening and closing states of the valves during wet suction, semi-dry suction, and pressure feeding of collected materials by the collection device of this embodiment.

(Wet suction operation)
During wet suction by the recovery device, open suction valve V01, open valve V1, close valve V2, open valve V3, open valve V4, open and close valve V5, close valve V6, close valve V7, The first stage blower 41 and the second stage blower 42 are driven by closing the valve V8, closing the valve V9, and closing the valve V10.
The objects to be collected 100 include a suction section 300, a receiver tank 31, a pipe L1, a secondary catcher 32, a pipe L20, a pipe L22, a pipe L25, a tertiary catcher 33, a pipe L3, a blower first stage 41, a pipe L4, and a blower 2. It is sent to stage 42, piping L5, and quaternary catcher 34 in this order.
As described above, during wet suction, the collected material 200 that has been sucked does not pass through the first filter device 71 and the second filter device 72.

(Semi-dry suction operation)
During semi-dry suction by the recovery device, open suction valve V01, open valve V1, close valve V2, open valve V3, close valve V4, open to close valve V5, close valve V6, open valve V7. , the valve V8 is opened, the valve V9 is opened, and the valve V10 is opened, and the first stage blower 41 and the second stage blower 42 are driven.
The object to be collected 100 includes a suction unit 300, a receiver tank 31, a pipe L1, a secondary catcher 32, a pipe L20, a pipe L21, a first filter device 71, a second filter device 72, a pipe L23, a pipe L25, and a tertiary catcher 33. , pipe L3, blower first stage 41, pipe L4, blower second stage 42, pipe L5, and quaternary catcher 34 in this order.
As described above, during semi-dry suction, the collected material 200 that has been sucked passes through the first filter device 71 and the second filter device 72.

(Pulse-feeding operation of recovered material)
When pumping the collected material 200, the suction valve V01 is closed, the valve V1 is closed, the valve V2 is opened, the valve V3 is closed, the valve V5 is opened, the valve V6 is opened, and the first blower stage 41 and the second blower stage 42 are operated. drive.
The air taken in from the suction silencer S2 and the vacuum breaker VB passes through valves V5 and V6, the tertiary catcher 33, piping L3, blower 1st stage 41, piping L4, blower 2nd stage 42, piping L11, and valve V2. The collected material 200 is fed into the receiver tank 31 and sent out to the outside through the discharge port 320.

(flow of cooling water)
The flow of cooling water for cooling the suction device 4 is such that water from the quaternary catcher 34 flows through piping L10, blower first stage 41, piping L4, blower second stage 42, and piping L5, Next, we will return to Catcher 34.

(Explanation of water adder)
Next, the structure and effects of the water adder placed in the suction section will be explained.
The water adder 5 of the present embodiment is used during semi-dry suction, and the moisture content of the collected material 200 stored in the receiver tank 31 is greater than 2 weight percent and less than 20 weight percent, preferably 6 weight percent or more and 10 weight percent. Water is added to the material to be collected 100 so that the water is mixed uniformly with the material 200 as follows.
Note that during wet suction, the water adder 5 of this embodiment is removed, a water hose connected to a water supply, for example, is attached to the suction section 300, and water is added to the collected object 100 in the suction section 300 from the water hose.

FIG. 4A is a diagram illustrating an example of an injection-type water dispenser according to an embodiment, and is a cross-sectional view of the injection-type water dispenser viewed from above.
In the injection type water adder 5A shown in FIG. 4A, a plurality of nozzles each having an injection port 50 with a hole diameter of 5.5 mm are provided on the inner peripheral surface of the suction port 310. Then, water 50A is injected toward the center from the plurality of injection ports 50 to increase the water content of the collected object 100 to be sucked. For example, when the suction speed of the collected material 100 is 80,000 (L/min), the recovery rate of the collected material 200 can be increased by increasing the amount of water to 15 (L/min) as shown in FIG. Significantly improved.

FIG. 4B is a plan view showing an example of the spray type water adder according to the embodiment, and a side sectional view showing the spraying state of the spray type water adder.
The water adder 5B shown in FIG. 4B includes a spray type hollow conical nozzle 51, and the spray port of the hollow conical nozzle 51 is located at the center of the hole diameter of the suction port 310. This empty conical nozzle 51 can produce stable spraying regardless of the level of liquid pressure, and can generate empty conical spray 51A with an annular spray pattern and relatively fine particle diameter.
The direction of the spray from the empty conical nozzle 51 of this embodiment is the same as the direction 100A in which the object to be collected 100 is sucked.
It was confirmed that the empty conical nozzle 51 used in this embodiment can produce the smallest water droplet diameter (650 μm) at normal tap water pressure (0.2 MPa).
As described above, by using the spray-type water adder 5B, there is an increased opportunity for water to bond with the collected material 100 to be sucked, and the water content of the collected material 100 can be uniformly increased.

In the collection method using wet suction, as shown in FIG. 9 described later, water is added to the collected material 100 at a water rate of 140 (L/min), and a wet slurry with a water content of 56 wt% of the collected material 200 is collected. I will do it. Since the wet recovered material 200 has a high moisture content, it is difficult to reuse it as a coal-based recovered material.
On the other hand, in the semi-dry collection method, by using the spray type water adder shown in FIG. 4A or the spray type water adder shown in FIG. It can be made into powder or granular material.
That is, by using the spray type water adder shown in FIG. 4A or the spray type water adder shown in FIG. 4B, the amount of water added to the collected material 100 can be increased from 5 L/min to 50 L/min, as shown in FIG. 9, which will be described later. min (semi-dry suction), and the moisture content of the collected material 200 is 2 wt % to 20 wt %, making it a powder fluid that is moist enough not to generate dust and easy to handle. In particular, by setting the moisture content of the recovered material 200 to 6 wt% to 10 wt%, it becomes a moist powder fluid that does not generate dust and is easy to handle, and the reuse rate of the recovered material 200 can be increased.

(Explanation of homogenization dispersion mechanism)
FIG. 5 is a diagram showing a state in which a chain is attached as an example of the homogenization and dispersion mechanism for coal-based recovered material according to the embodiment.
FIG. 6 is a diagram illustrating the function of the chain, which is the equalization and dispersion mechanism, in the suction work vehicle according to the embodiment.
FIG. 5 shows a state in which a plurality of chains 7 are installed in the receiver tank 31 as an example of a homogenizing and dispersing mechanism for the collected material 200 sucked from the suction unit 300.
In FIGS. 5 and 6, the recovered material 200 sucked into the receiver tank 31 from the suction hose 2 and the suction port 310 collides with the contact plate 330 disposed at the upper part of the receiver tank 31, and then flows from the upper part of the receiver tank 31. It collides with the chain 7, which is a suspended homogenizing and dispersing mechanism, and falls to the bottom of the receiver tank 31, where it is collected. In this case, the collected material 200 collides with the plurality of chains 7 made of metal or the like, so that the collected material 200 can be evenly and dispersedly deposited on the bottom of the receiver tank 31.
In addition, as shown in FIG. 6, when the collected material 200 is sucked, by tilting the bottom of the receiver tank 31 on the suction section 300 side downward, the collected material 200 can be evenly distributed at the bottom of the receiver tank 31. It can be deposited in a dispersed manner.

(Explanation of rupture disc)
Next, the rupture disc installed in the receiver tank will be explained.
7A and 7B are a plan view and a side half-sectional view showing a rupture disc installed in a receiver tank.
The rupture disc 6 shown in FIGS. 7A and 7B includes a rupture disc body 61, a flange 60 to which the rupture disc body 61 is attached, and a cover 62 that protects the rupture disc body 61 and the flange 60. The rupture disc 6 is attached to the receiver tank 31 with bolts or the like.
The rupture disc 6 shown in FIGS. 7A and 7B plays the role of releasing gas to the atmosphere by destroying the rupture disc main body 61 when the gas pressure inside the receiver tank 31 exceeds a specified value.
Further, a dedicated ground wire (not shown) is installed in the receiver tank 31. When the recovered material 200 is pulverized coal or the like, the spark discharge caused by the recovered material 200 can be caused to flow to the outside through a dedicated ground wire.

(Filter explanation)
FIG. 8 is a diagram illustrating a filter that collects uncollected materials (particles, etc.) sent out from a receiver tank, and the filter includes the first filter device 71 and the second filter shown in FIG. It is installed in the device 72.
In FIG. 8, FIG. 8A is a schematic perspective view showing the filter of this embodiment, FIG. 8B is a schematic cross-sectional view of portion C in FIG. FIG.

Conventional bag filters are designed to suck dry powder, etc., and when wet dust or the like is sucked, it sticks to the bag filter cloth, reducing the suction power.
In order to avoid this, in this embodiment, a filter is used in which a resin coating layer having second holes smaller than the first holes is applied on the surface of a base material made of a resin sintered body having first holes. .
In particular, as shown in FIG. 8, a sintered lamellar filter (registered trademark of Nittetsu Mining Co., Ltd.) was used as the filter 90. This sintered lamellar filter (registered trademark) has a corrugated base material 92 made by sintering several kinds of materials, and has good releasability against collected powder 94, and has a high moisture content that allows coal-based collected materials to adhere to the surface. A fluorinated resin coating layer 91 is applied, which has hydrophobicity to prevent water and has an excellent brushing function.
The base material 92 of the sinter lamellar filter (registered trademark) is formed of a sintered polymer, and has voids of about 40 μm on average lined up inside. The fluoride resin coating layer 91 is applied to the surface of the base material 92, and the coating layer forms voids of 3 to 4 μm, and the powder 93 is collected with extremely high efficiency and becomes collected powder 94, which is then collected. The collected powder 94 is brushed off and does not flow into the filter.
Further, this filter 90 is a self-supporting type that can be held by itself, and does not require a retainer fitting for holding a filter body, which is required in a conventional bag filter.
As described above, by employing the filter of this embodiment, even wet powder 93 can be collected, and generation of static electricity can be suppressed.
Note that the filter 90 used in the first filter device 71 and the second filter device 72 is not limited to a sintered lamellar filter (registered trademark), but is also a coal-based filter that has good releasability to the collected powder 94 and has a high moisture content. Any filter may be used as long as it has hydrophobic properties that prevent the collected materials from adhering.

(Device for removing coal-based recovered materials)
In this embodiment, as shown in FIG. 1, an impact is applied to the receiver tank 31 to remove coal-based recovered material 200 (wet powder and granules) adhering to the inner wall of the receiver tank 31. A brushing device 82 was installed to remove the particles.
Here, as the scraping device 82, for example, an air type is used in which a piston gives a strong blow to the receiver tank 31 using the force of compressed air and magnetic force, and the resulting vibration shakes off the coal-based recovered material 200 adhering to the inner wall of the receiver tank 31. I used a knocker.
Furthermore, in this embodiment, the inner surface of the receiver tank 31 is polished (sliding) to improve the slipperiness of the coal-based recovered material 200 when the coal-based recovered material 200 is discharged. In combination with the scraping device 82, the problem of sticking of the inner surface of the receiver tank 31 when discharging the coal-based recovered material 200 is completely solved, and the manual scraping work of entering the receiver tank 31 can be omitted. Now you can.

(Effects of embodiment)
Next, the difference in effects between the semi-dry suction operation and the wet suction operation in the coal-based recovery material recovery apparatus of this embodiment will be explained.
FIG. 9 is a diagram showing the difference in effects between the semi-dry suction operation and the wet suction operation according to the present embodiment.
Note that the numerical values and quantities in FIG. 9 are those for one suction work vehicle equipped with the coal-based recovered material recovery apparatus of this embodiment.
Moreover, the numerical values and quantities in FIG. 9 are the numerical values and quantities when the suction speed for sucking the coal-based recovered material is about 80,000 (L/min).
In the figure, the amount of water added (L/min) means the amount of water added to the collected material 100 by the water adder 5 (L/min). The suction time (min) means the suction time (min) of the object 100 to be collected by the suction unit 300. The total amount of water added (kg) means the cumulative amount of the amount of water added (L/min) and the collection time (min). The total suction amount (kg) is the sum of the total amount (kg) of the collected material 200 sucked and the total amount of water added (kg). The net recovery amount (kg) of recovered material is the total amount of water added (kg) subtracted from the total suction amount (kg). The moisture content (wt/%) of the recovered material is the amount of water contained in the recovered material 200 expressed in weight percent (wt%).

In FIG. 9, data were collected when the amount of water added was 5 (L/min), 15 (L/min), 25 (L/min), and 50 (L/min) as a semi-dry suction operation.
When the amount of water added is 5 (L/min), 15 (L/min), 25 (L/min), and 50 (L/min), the net recovery amount of the recovered material 200 is approximately 4900 (kg), approximately 4,700 (kg), approximately 4,500 (kg), and approximately 4,000 (kg), and the moisture content of the recovered material 200 is 2 (wt%), 6 (wt%), 10 (wt%), and 20 (wt%). became.

On the other hand, in FIG. 9, when the amount of water added is 140 (L/min) as a wet suction operation, the net amount of recovered material 200 is approximately 2200 (kg), and the water content of recovered material 200 is 56 (wt%). ).

In Fig. 9, the amount of water added is 5 (L/min), 15 (L/min), 25 (L/min), and 50 (L/min) as semi-dry suction operation, and the amount of water added as wet suction operation. Compared to the case where 140 (L/min), the amount of water added is reduced to 1/28, 3/28, 5/28, and 5/14, and the net recovery amount of 200 recovered materials is approximately ( 49/22), about (47/22), about (45/22), and about (40/22).

As described above, according to the semi-dry suction operation of the present embodiment, the water adder is used so that the moisture content of the coal-based recovered material stored in the receiver tank becomes more than 2 weight percent and 20 weight percent or less. Since water is added to the coal-based recovered material, it is possible to suppress dust generation during discharge, and it is possible to provide a collection device and a suction work vehicle with a high reuse rate of the coal-based recovered material.
Here, the reason why the moisture content of the coal-based recovered material was set to be more than 2% by weight is that dust generation during discharge can be suppressed to the minimum. In addition, the reason why the moisture content of coal-based recovered materials is set to 20% by weight or less is that the moisture content of low volatile bituminous coal suitable for coke production is 14% to 22% by weight (US test). This is based on the Japan Materials Association's coal classification (ASTMD-388).

Furthermore, by adding water to the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is between 6% and 10% by weight, dust generation during discharge can be reliably reduced. Since the moisture content can be suppressed and the moisture content is close to that of anthracite coal, which has a high calorific value, the reuse rate of coal-based recovered materials can be further increased.

This time, the coal-based recovered material recovered through semi-dry operation has a calorific value of more than 5,000 (kcal/kg) and can be used as a resource for fuel or materials. In addition, the recovered coal-based material can be pressurized into pellets and applied to uses other than steel manufacturing.

As described above, according to the recovery device for coal-based recovered materials of this embodiment,
A receiver tank that sucks coal-based recovered materials through a suction unit using a suction device and stores the sucked coal-based recovered materials;
A coal-based recovered material collection device comprising: a filter connected to the receiver tank to collect the uncollected coal-based recovered material that was not stored inside the receiver tank,
The suction section is provided with a water adder, and the water adder is configured to cool the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is greater than 2% by weight and equal to or less than 20% by weight. I decided to add water to the
It is possible to suppress dust generation during discharge and to improve the reuse rate of the coal-based recovered material stored in the receiver tank.

Further, the water adder adds water to the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is 6% by weight or more and 10% by weight or less.
It is possible to reliably suppress dust generation during discharge and to improve the reuse rate of the coal-based recovered material stored in the receiver tank.

Further, the water adder is configured to add water to the coal-based recovered material so that the coal-based recovered material and moisture are uniformly mixed.
It is possible to reliably suppress dust generation during discharge and to improve the reuse rate of the coal-based recovered material stored in the receiver tank.

The water adder may include a jet type water adder that jets water from a plurality of jet ports provided on the inner peripheral surface of the suction section, and a nozzle that sprays water from a nozzle located in the center of the suction section. Since I chose one of the spray type water adders,
There are more opportunities for the coal-based recovered material to combine with moisture, and the recovery rate of the coal-based recovered material is improved.

Further, the filter is a filter in which a resin coating layer having second holes smaller than the first holes is applied on the surface of a base material having first holes made of a resin sintered body,
It has good releasability to collected powder, can prevent adhesion of coal-based recovered materials with high moisture content, and can improve the recovery rate of coal-based recovered materials.

Further, since the homogenization and dispersion mechanism for the coal-based recovered material is disposed inside the receiver tank at a position where the coal-based recovered material sucked from the suction part collides,
The coal-based recovered material can be evenly distributed and deposited at the bottom of the receiver tank.

Furthermore, since the homogenizing and dispersing mechanism is constituted by a chain, the coal-based recovered material can be evenly distributed and deposited on the bottom of the receiver tank with a simple configuration.

Further, the receiver tank is provided with a rupture disc that releases the gas inside the receiver tank to the atmosphere when the gas pressure inside the receiver tank exceeds a specified value.
It is possible to prevent an increase in gas pressure inside the receiver tank.

Further, a scraping device is provided outside the receiver tank to apply an impact to the receiver tank and drop off the coal-based recovered material adhering to the inner wall of the receiver tank.
The coal-based recovered material adhering to the inner wall of the receiver tank can be dropped, and the coal-based recovered material inside the receiver tank can be efficiently recovered.

In addition, the coal-based recovered material recovery apparatus is capable of adding water so that the moisture content of the coal-based recovered material is greater than 2% by weight and 20% by weight or less, and when the water content of the coal-based recovered material is 20% by weight or less. It is configured so that it is possible to select either the case where water is added so that it becomes more than %,
When adding water so that the moisture content of the coal-based recovered material is more than 2% by weight and less than 20% by weight, the water adder is used and the unrecovered coal-based recovered material that is not stored inside the receiver tank is used. If the coal-based recovered material is passed through the filter and water is added so that the moisture content of the coal-based recovered material is more than 20% by weight, the unrecovered coal-based recovered material that was not stored inside the receiver tank without using the water adder is Since the coal-based recovered material was not allowed to pass through the filter,
When adding water so that the moisture content of the coal-based recovered material is more than 2% by weight and less than 20% by weight, dust generation at the time of discharge is suppressed and the coal-based recovered material stored in the receiver tank is reused. rate can be improved.

Further, according to the suction work vehicle equipped with the recovery device for coal-based recovered materials, the suction work vehicle suppresses dust generation during discharge and improves the reuse rate of the coal-based recovered materials stored in the receiver tank. can be provided.

Although this disclosure describes exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to the application of particular embodiments, and may stand alone. Alternatively, various combinations can be applied to the embodiments.
Accordingly, countless variations not illustrated are envisioned within the scope of the present disclosure. For example, this includes cases in which at least one component is modified, added, or omitted.

Hereinafter, various aspects of the present disclosure will be collectively described as supplementary notes.
(Additional note 1)
A receiver tank that sucks coal-based recovered materials through a suction unit using a suction device and stores the sucked coal-based recovered materials;
A coal-based recovered material collection device comprising: a filter connected to the receiver tank to collect the uncollected coal-based recovered material that was not stored inside the receiver tank,
The suction section is provided with a water adder, and the water adder is configured to cool the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is greater than 2% by weight and equal to or less than 20% by weight. A recovery device for coal-based recovered materials that adds water to the water.
(Additional note 2)
The water adder is configured to add water to the coal-based recovered material such that the water content of the coal-based recovered material stored in the receiver tank is 6% by weight or more and 10% by weight or less. Collection equipment for collected items.
(Additional note 3)
The water adder is configured to add water to the coal-based recovered material so that the coal-based recovered material and moisture are uniformly mixed. Collection device.
(Additional note 4)
The water adder includes a spray type water adder that sprays water from a plurality of spray ports provided on the inner peripheral surface of the suction section, and a sprayer that sprays water from a nozzle arranged in the center of the suction section. The recovery device for coal-based recovered materials according to Supplementary Note 3, which is any one of the type water adders.
(Appendix 5)
The filter is a filter in which a resin coating layer having second pores smaller than the first pores is applied on the surface of a base material having first pores made of a resin sintered body, according to any one of Supplementary Notes 1 to 4. The recovery device for coal-based recovered materials according to item 1.
(Appendix 6)
According to any one of Supplementary Notes 1 to 5, wherein a homogenizing and dispersing mechanism for the coal-based recovered material is disposed inside the receiver tank at a position where the coal-based recovered material sucked from the suction section collides with the coal-based recovered material. Recovery equipment for coal-based recovered materials.
(Appendix 7)
The recovery device for coal-based recovered materials according to appendix 6, wherein the homogenization and dispersion mechanism is configured by a chain.
(Appendix 8)
According to any one of appendices 1 to 7, the receiver tank is provided with a rupture disc that releases the gas inside the receiver tank to the atmosphere when the gas pressure inside the receiver tank exceeds a specified value. Recovery equipment for coal-based recovered materials.
(Appendix 9)
According to any one of Supplementary Notes 1 to 8, the apparatus is provided with a scraping device provided on the outside of the receiver tank to apply an impact to the receiver tank and drop off the coal-based recovered material adhering to the inner wall of the receiver tank. Recovery equipment for coal-based recovered materials.
(Appendix 10)
The coal-based recovered material recovery apparatus is used in cases where water is added to the coal-based recovered material so that the moisture content is more than 2 weight percent and 20 weight percent or less, and when the water content of the coal-based recovered material is less than 20 weight percent. It is configured so that it is possible to select either one of adding water to increase the amount of water,
When adding water so that the moisture content of the coal-based recovered material is more than 2% by weight and less than 20% by weight, the water adder is used and the unrecovered coal-based recovered material that is not stored inside the receiver tank is used. When the coal-based recovered material is passed through the filter and water is added so that the moisture content of the coal-based recovered material is more than 20% by weight, the unrecovered coal-based recovered material that was not stored inside the receiver tank without using the water adder is The apparatus for collecting coal-based recovered materials according to any one of Supplementary Notes 1 to 9, wherein the coal-based recovered materials are not allowed to pass through the filter.
(Appendix 11)
A suction work vehicle equipped with a recovery device for coal-based recovered materials according to any one of Supplementary Notes 1 to 10.

2 Suction hose, 4 Suction device, 5, 5A, 5B Water adder, 6 Rupture disk,
7 chain, 31 receiver tank, 32 secondary catcher,
33 tertiary catcher, 34 4th catcher, 50 injection port,
51 empty conical nozzle, 71 first filter device, 72 second filter device,
90 filter, 91 resin coating layer, 92 base material, 100 coal-based recovered material,
200 Coal-based recovered material, 300 Suction part, 310 Suction port, 1000 Recovery device,
2000 Suction work vehicle.

Claims (10)

A receiver tank that sucks coal-based recovered materials through a suction unit using a suction device and stores the sucked coal-based recovered materials;
A coal-based recovered material collection device comprising: a filter connected to the receiver tank to collect the uncollected coal-based recovered material that was not stored inside the receiver tank,
The suction section is provided with a water adder, and the water adder is configured to cool the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is greater than 2% by weight and equal to or less than 20% by weight. A recovery device for coal-based recovered materials that adds water to the water. The coal according to claim 1, wherein the water adder adds water to the coal-based recovered material so that the moisture content of the coal-based recovered material stored in the receiver tank is 6% by weight or more and 10% by weight or less. System recovery equipment. The water adder is configured to add water to the coal-based recovered material so that the coal-based recovered material and moisture are uniformly mixed,
The water adder includes a spray type water adder that sprays water from a plurality of spray ports provided on the inner peripheral surface of the suction section, and a sprayer that sprays water from a nozzle arranged in the center of the suction section. The recovery device for coal-based recovered materials according to claim 1 or 2, which is either a type of water adder. 3. The filter is a filter in which a resin coating layer having second holes smaller than the first holes is applied on the surface of a base material made of a resin sintered body having first holes. The recovery device for coal-based recovered materials described above. Coal-based recovery according to claim 1 or 2, wherein a homogenizing and dispersing mechanism for the coal-based recovered material is disposed inside the receiver tank at a position where the coal-based recovered material sucked from the suction section collides with the coal-based recovered material. Item recovery device. 6. The recovery device for coal-based recovered materials according to claim 5 , wherein the homogenizing and dispersing mechanism is constituted by a chain. Coal-based recovery according to claim 1 or 2, wherein the receiver tank is provided with a rupture disc that releases the gas inside the receiver tank to the atmosphere when the gas pressure inside the receiver tank exceeds a specified value. Item recovery device. Coal-based recovery according to claim 1 or 2, further comprising a scraping device provided outside of the receiver tank to apply an impact to the receiver tank and drop off the coal-based recovered material adhering to the inner wall of the receiver tank. Item recovery device. The coal-based recovered material recovery apparatus is used in cases where water is added to the coal-based recovered material so that the moisture content is more than 2 weight percent and 20 weight percent or less, and when the water content of the coal-based recovered material is less than 20 weight percent. It is configured so that it is possible to select either one of adding water to increase the amount of water,
When adding water so that the moisture content of the coal-based recovered material is more than 2% by weight and less than 20% by weight, the water adder is used and the unrecovered coal-based recovered material that is not stored inside the receiver tank is used. If the coal-based recovered material is passed through the filter and water is added so that the moisture content of the coal-based recovered material is more than 20% by weight, the unrecovered coal-based recovered material that was not stored inside the receiver tank without using the water adder is The apparatus for collecting coal-based recovered materials according to claim 1 or 2, wherein the coal-based recovered materials are not allowed to pass through the filter. A suction work vehicle equipped with the recovery device for coal-based recovered materials according to claim 1 or 2.