JPS6321540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water spraying device for preventing scattering of coal dust in outdoor coal storage areas in call centers, coal-fired power plants, and the like.

Currently, our country is diversifying its energy resources, and coal is being reconsidered as an alternative to oil, which has traditionally been the main energy source. Construction of new coal-fired power plants is planned. In all of these cases, it is necessary to store a huge amount of coal, and pollution of the surrounding environment due to scattered coal dust has been highlighted as one of the pollution problems such as noise, air pollution, and water pollution.
For this reason, methods of preventing coal dust scattering such as indoor coal storage or silo coal storage are being considered, but since outdoor coal storage is the most advantageous in terms of equipment cost, this outdoor method is often adopted. There is a need for an effective coal dust scattering prevention device.

Conventionally, methods for preventing scattering of coal dust in an outdoor coal storage yard include rolling compaction using a bulldozer, spraying an agent to prevent scattering of coal dust, and pouring water to prevent scattering of coal dust. Although compaction using a bulldozer requires a lot of time and effort, it is less effective in preventing scattering under strong winds, while spraying a coal dust scattering prevention agent is effective for long-term coal storage, but it requires loading and unloading in a short time. In some cases, water injection to prevent coal dust from scattering tends to be widely used, as there is a disadvantage that spraying has to be done frequently and requires a great deal of labor.

As shown in Figure 1, the wind speed at which coal dust begins to scatter changes depending on the particle size of the coal and the moisture attached to the coal. Domestic coal, which has been widely used in the past, generally has a large particle size and tends to be difficult to scatter. However, more than 20% of the overseas coal that we will have to rely on in the future is coal with small particle diameters of 1mmφ or less.
It tends to scatter very easily. However, as shown in Figure 1, these foreign coals will not scatter even in strong winds if a certain amount of attached moisture is added, but in strong winds, the attached moisture tends to evaporate due to the wind, and when the attached moisture decreases, scattering becomes less likely. Therefore, a water discharging device is required that can inject water as evenly as possible over the entire coal pile even during strong winds.

Conventionally used water spray equipment has a water spray nozzle that has a certain elevation angle relative to the coal pile, and inverts the water to face the coal pile and sprays water only in the form of rain. Because the water flow is easily deflected and the distance the water reaches is limited, it is impossible to inject water into the entire coal pile.
Water could not be expected to be effective in preventing the scattering of coal dust at all, and water was injected manually using a separate device.

In order to eliminate these drawbacks, the present invention has been developed to provide an outdoor coal storage yard that uniformly injects water into the coal pile under all wind speeds and prevents the scattering of coal dust by changing the water discharge pattern according to the wind speed of the outdoor coal storage yard. Provides a water spray device used to prevent coal dust from scattering.

The first water spraying device of the present invention is arranged so that the angle of elevation of the fan-shaped rotating surface of the water spraying nozzle, which can freely rotate in a fan shape, of the water spraying device disposed around the coal pile can be adjusted freely, and when the wind is weak, the coal pile can be This is a water spraying device for preventing coal dust scattering, which sprays water directly onto the coal storage pile, and when there is a strong wind, the water spraying device on the windward side sprays water at an increased angle of elevation to spray water onto the coal storage pile. The water spray device installed around the mountain has a fan-shaped water spray nozzle that can freely rotate horizontally within the vertical plane, and when there is a weak wind, it sprays water directly onto the coal pile.
This is a water spray device for preventing coal dust scattering that injects scattered water into the coal pile by increasing the elevation angle of the water spray device on the windward side during strong winds.

The device of the present invention will be explained with reference to the drawings. As shown in FIG. 2, water spray devices are appropriately installed on the ground around the coal pile, and the device of the present invention measures the wind direction of the coal pile using an anemometer (not shown). The wind speed is monitored, and when the wind speed is weak and does not reach a preset value, the water nozzle of the water spray device installed around the coal storage area is maintained at a preset elevation angle to the ground surface, and turned into a fan shape to face the coal storage pile. It is preferable to spray water by swirling and spraying water directly onto the coal storage pile in the form of rain, and when the wind speed is strong than a preset value, the preset elevation angle of the water spray nozzle of the water spray device installed at least on the windward side is increased. This is used to spray water in a rotating manner so as to form a water curtain that is almost perpendicular to the ground surface and facing the coal pile, and to use tailwinds to inject the scattered water into the coal pile.

Next, a first embodiment of the coal dust scattering prevention device of the present invention will be explained in detail with reference to FIG.

This water discharging device includes a water discharging nozzle 1 and a first body 2.
and the second carrier 3 are assembled on the base 4.
In detail, the first drive body 2 is rotatably supported by the support part 6 of the base 4 with its rotating shaft 5 horizontally, and the first drive body 2 is vertically supported at one end of the rotating shaft 5. It is equipped with a control mechanism 7 that rotates repeatedly. The second precursor 3 is
The first drive body 2 is arranged such that the rotation axis 8 is parallel to the vertical rotation plane of the first drive body 2 and is rotatable about the rotation axis 8.
A control mechanism 9 is provided at one end of the rotating shaft 8 to repeatedly rotate the second drive body 3 in forward and reverse directions. Further, the water discharge nozzle 1 is fixed to the second driver 3 with its water discharge axis and rotation axis 8 forming a right angle, and is provided with a flexible water pipe 10 for supplying water to the water discharge nozzle 1.

To explain the operation of this water spraying device, the second rotating shaft 8 of this water spraying device is installed facing toward the coal pile, and the control device 7 is configured to direct the water spraying nozzle upward and at a predetermined angle of elevation with respect to the ground. Set in 9,
When the wind is weak, the control device 9 repeatedly rotates the second drive body 3 in forward and reverse directions to discharge water, and the water discharged from the water discharge nozzle can be made into a fan shape and directly sprinkled onto the coal pile. In addition, in case of strong winds, while performing the above-mentioned direct water injection, the first drive body 2 is rotated by the control device 7 to increase the elevation angle of the water nozzle and, if desired, to form a water curtain perpendicular to the ground. , it is possible to inject scattered water into the coal storage pile using wind power.

Since the first water discharging device of the present invention is configured in this way, water can be sprinkled or splashed in a fan shape depending on the wind speed, so it has the advantage of being able to uniformly inject water over a wide range of coal piles. be.

In addition, in the above explanation, an independent flexible water pipe was shown as a water supply pipe that supplies water to the water discharge nozzle, but inside the first body 2 and inside the second body 3
Providing a water supply pipe that communicates with the inside of the container and making it serve both as the carrier and the water supply pipe eliminates the poor durability of flexible pipes and provides a preferable structure.

Further, a second embodiment of the coal dust scattering prevention device of the present invention will be described in detail with reference to FIG. 4.

This water discharging device includes a water discharging nozzle 1 and a first body 2.
and the second base body 3 are assembled on the base 4,
The first drive body 2 is mounted on a base 4 with its rotation axis 5 perpendicular.
The first drive body 2 is rotatably supported by a support portion 6, and is provided at one end of the rotation shaft 5 with a control device 7 for repeatedly rotating the first drive body 2 in forward and reverse directions. The second drive body 3 is rotatable about its second rotation axis 8, and the first drive body 2 is rotated in a horizontal plane by the rotation of the first drive body 2.
A control device 9 is attached to one end of the rotating shaft 8 to repeatedly rotate the second drive body 3 in forward, reverse and reverse directions. The water discharge nozzle 1 is fixed to the second driver 3 with the water discharge shaft and the rotating shaft 8 forming a right angle, and includes a flexible water pipe 10 for supplying water to the water discharge nozzle 1.

To explain the operation of this second water discharging device, this water discharging device is arranged around the coal pile, and the water discharging nozzle 1
The control devices 7 and 9 are set so that the coal pile faces upward and faces the coal storage pile and gives a predetermined elevation angle to the ground.
When the wind is weak, the control device 7 repeatedly rotates the first drive body 2 in forward and reverse directions to supply water, and the water discharged from the water discharge nozzle can be made into a fan shape and directly sprinkled onto the coal pile. Moreover, in the case of strong winds, the second drive body 3 is rotated by the control device 9 to increase the elevation angle of the water discharge nozzle, so that scattered water can be injected into the coal pile by wind power. Furthermore, in this case, as the angle of elevation increases, the fan angle of the water spray nozzle seen in elevation becomes smaller, so the fan-shaped rotation of the water spray nozzle may be changed as follows, if desired. That is, the control device 7
The first drive body 2 is rotated, and the rotation axis of the second drive body 3 is made to coincide with the direction of the wind flow, and then the water discharge nozzle 1 is repeatedly rotated in forward and reverse directions by the control device 9. Therefore, it is possible to form a fan-shaped water curtain perpendicular to the ground.

Since the second water discharging device of the present invention is configured in this way, water can be sprinkled or splashed in a fan shape depending on the wind speed, so it has the advantage of being able to uniformly inject water over a wide range of coal piles. be. Particularly in the case of strong winds, the first propeller 2 can be rotated according to the wind direction to form a fan-shaped water curtain perpendicular to the wind direction, which has the advantage of more accurately performing spray water injection.

In addition, in the above explanation, an independent flexible water pipe was shown as a water pipe that supplies water to the water discharge nozzle, but a water pipe that communicates with the inside of the first body 2 and the second body 3 is provided, A structure that also serves as a water pipe is also preferable, as in the case of the water discharge device of the first embodiment.

Furthermore, the control devices 7 and 9 provided in the first and second water spraying devices of the present invention repeatedly rotate the respective drives in forward and reverse directions, detect the rotational position, and control the respective drives at predetermined positions. Any device that has the function of stopping the body may be used, and it may be an electric type consisting of a servo motor, potentiometer, limit switch, etc., or a piston device, switching valve, lever device, etc. driven by water pressure, hydraulic pressure, or pneumatic pressure. Configured mechanical or combination control devices may also be used.

As explained above, the water spraying device for preventing scattering of coal dust of the present invention is capable of effectively injecting water into the coal pile according to the wind speed, so that the moisture attached to the coal pile can be maintained at a value that makes it difficult to scatter over the entire coal pile. Therefore, it is possible to prevent coal dust from scattering regardless of the wind direction.

Furthermore, spontaneous combustion disasters in coal piles can be prevented, and the present invention can contribute to the development of industry.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the relationship between coal particle size, adhering moisture, and wind speed at which coal dust starts scattering.
Figure A is a side view showing an embodiment of the first water spraying device of the present invention, Figure 3B is a top view, and Figure 4A is a side view showing an embodiment of the second water spraying device of the present invention.
FIG. 4B is also a top view. DESCRIPTION OF SYMBOLS 1...Water nozzle, 2...First drive body, 3...Second drive body, 4...Base, 5...First rotating shaft, 6...Support part, 7...Control device for the first drive body , 8...Second rotating shaft, 9...Second drive control device, 10...Water pipe.

Claims (1)

[Claims] 1. A water spraying device disposed around a coal pile, which comprises a water spraying nozzle, a first drive member having a first rotating shaft, and a second drive member having a second rotating shaft. comprising a precursor,
The first drive body is rotatably attached to the base with its first rotation axis horizontal, and the second drive body is rotatably attached to the base with its first rotation axis horizontal.
The vertical plane including the second rotation axis is mounted on the first drive member so as to be rotatable about the rotation axis of A water discharge shaft is fixed to the drive body in a plane perpendicular to the second rotation axis, and a control mechanism for repeatedly rotating the first drive body and the second drive body in forward and reverse directions, and a water discharge nozzle are provided. 1. A water spraying device for preventing scattering of coal dust, characterized in that the elevation angle of the fan-shaped rotating surface of a water spraying nozzle that can freely rotate in a fan-shaped manner can be adjusted with respect to a horizontal plane. 2 The water supply structure that supplies water to the water discharge nozzle is the first and second
2. A water spray device for preventing scattering of coal dust according to claim 1, which is provided inside each of the bodies so as to communicate with each other. 3. A water spraying device disposed around a coal pile, comprising a water spray nozzle, a first drive body having a first rotation axis, and a second drive body having a second rotation axis, 1
The drive body is rotatably attached to the base with its first rotation axis vertical, and the second drive body is rotatably attached to the base with its first rotation axis vertical, and the second drive body is rotatable about its second rotation axis. The water discharge nozzle is attached to the first drive body horizontally, and the water discharge nozzle is fixed to the second drive body in a plane in which the water discharge shaft is perpendicular to the second rotation axis. The coal dust scattering device is characterized in that it is equipped with a control mechanism that repeatedly rotates the two drives in forward and reverse directions, and a water supply structure that supplies water to the water discharge nozzle, and the water discharge nozzle that can freely rotate in a fan shape can freely rotate horizontally. Prevention water spray device. 4 The water supply structure that supplies water to the water nozzle is the first and second one.
4. A water spray device for preventing scattering of coal dust according to claim 3, wherein the water spraying device is provided in communication with each other inside each of the substrates.