Full-area spraying dust suppression method for coal yard

Abstract

The invention relates to the technical field of coal yard dust control, and discloses a coal yard full-area spraying dust suppression method which comprises the following steps: surveying and mapping a coal yard, and determining a central point of a coal output area of the coal yard; preparing three spraying dust suppression devices, and circumferentially equidistantly mounting the three spraying dust suppression devices on the coal yard enclosing wall by taking the central point of the coal storage area of the coal yard as a circle point and the coal yard enclosing wall as a boundary; starting the spraying dust suppression devices by taking the direction of the central point of the coal storage area of the coal yard as an initial spraying position, forming an initial overlapping area by the initial spraying coverage areas of the three spraying dust suppression devices at the central point of the coal storage area of the coal yard, and meanwhile, measuring the height of a coal pile of the coal yard; the initial spraying height of each spraying dust suppression device is adjusted according to the measured height of the coal pile of the coal yard; the working parameters of each spray dust suppression device are adjusted in real time according to the parameters in the coal yard until dust suppression is finished; the dust suppression device has the advantages of being lower in maintenance difficulty, lower in maintenance danger and good in dust suppression effect.

Description

TECHNICAL FIELD

[0001] The present application relates to a coal yard full-area spraying dust suppression method, belonging to the technical field of coal yard dust control. BACKGROUND

[0002] The coal yard is an important place for coal storage, transportation and processing, mainly used for stacking raw coal or finished coal after washing and selecting, providing fuel or raw materials for power plants, steel plants, chemical plants and other enterprises. However, coal belongs to loose granular material, and fine coal powder is easy to drift due to wind or mechanical operation. Coal dust not only causes resource waste, but also accumulates on the ceiling of the coal yard, power distribution room and other facilities, posing a fire hazard. Moreover, coal dust also pollutes the surrounding air, forming a black dust cloud that blocks monitoring, and long-term inhalation may cause respiratory diseases. The drifting coal powder also pollutes the soil and water.

[0003] Therefore, in the prior art, the patent application for invention with the patent application number CN202410716051.8 discloses a spraying dust suppression device and a circular coal yard. The spraying dust suppression device is arranged in a ring shape with the water distribution pipe connected to the spherical net rack of the coal yard, the spray assembly is arranged along the circumference of the water distribution pipe and communicated with the water distribution pipe, and the corresponding water supply pipeline is arranged. When the dust suppression effect is required, the water output by the water supply pipeline enters the spray assembly in the form of mist under the action of the spray assembly, thereby achieving the required dust suppression effect. However, the following problems still exist in actual use: 1. The spraying dust suppression device is installed on the top of the coal yard. Once the pipe is broken or the nozzle is blocked, the maintenance personnel need to perform the work at height, which increases the difficulty and danger of maintenance.

[0004] 2. Although the spraying dust suppression device is installed on the top of the coal yard to have a large coverage area, the actual nozzle layout and the pipe direction may affect the coverage of some edge and corner positions of the coal yard, thereby forming a dust suppression dead angle and affecting the overall dust suppression effect. SUMMARY

[0005] In order to solve the above problems existing in the prior art, the present application provides a coal yard full-area spraying dust suppression method.

[0006] The technical scheme of the present application is as follows: A coal yard full-area spraying dust suppression method, comprising the following steps: Step 1: preparation before dust suppression; mapping the coal yard to determine the center point of the coal yard coal area; Step 2: install the spraying dust suppression device; prepare three spraying dust suppression devices, take the center point of the coal yard coal storage area as the center point, and install the three spraying dust suppression devices on the coal yard fence in a circular manner at equal intervals. Third step: start dust suppression work; with the center point of the coal storage area as the initial position of the spray, start the spray dust suppression device, and the initial spray coverage area of the three spray dust suppression devices forms an initial overlapping area at the center point of the coal storage area. At the same time, the height of the coal pile in the coal yard is measured, and the initial spray height of each spray dust suppression device is adjusted according to the measured height of the coal pile in the coal yard. Fourth step: parameter adjustment in dust suppression work; the working parameters of each spray dust suppression device are adjusted in real time in combination with various parameters in the coal yard until the dust suppression is completed.

[0007] Specifically, the adjustment method is: The wind direction and wind speed of the coal yard are monitored in real time, and the spray speed of the two spray dust suppression devices opposite to the wind direction of the coal yard is adjusted according to the real-time monitoring of the wind direction and wind speed of the coal yard; The dust concentration of the coal yard is monitored in real time from top to bottom, and the real-time spray height of each spray dust suppression device is adjusted according to the real-time monitoring of the dust concentration of the coal yard; The spray ends of the three spray dust suppression devices are driven to rotate horizontally, and the rotating spray areas of the three spray dust suppression devices are intersected to form a moving overlapping area.

[0008] Further, the calculation formula of the spray speed of the spray dust suppression device and the wind speed of the coal yard in the fourth step is:

[0009] In the formula, V p is the actual spray speed of the spray dust suppression device, V b is the constant spray speed of the spray dust suppression device, K is the wind speed compensation coefficient, which is 0.5-1.2, and V w is the measured wind speed of the coal yard.

[0010] Further, the horizontal plane azimuth angles of the spray ends of the three spray dust suppression devices are circular with the center point of the coal storage area as the center, which are 0°, 120° and 240° respectively, and the initial spray angles of the spray ends of the three spray dust suppression devices are set to be different from each other.

[0011] Further, the spray diffusion angle of each spray dust suppression device covers 120° of the circumference of the initial overlapping area.

[0012] Further, the angle range of the reciprocating horizontal rotation of each spray dust suppression device is ±90°, and the vertical pitch swing angle range of the spray end of each spray dust suppression device is -10° to +45°.

[0013] Further, the spray dust suppression device comprises a base, the top of the base is provided with a horizontal rotating platform, the top of the horizontal rotating platform is connected with a mounting bracket in a "N" shape structure, the horizontal rotating platform can drive the mounting bracket to reciprocatingly rotate horizontally, the inner side of the mounting bracket is movably connected with a fog gun through a rotating shaft, the fog gun can vertically oscillate on the mounting bracket under the action of the rotating shaft, and a driving motor is further arranged on the mounting bracket, and the main shaft part of the driving motor is in transmission connection with the rotating shaft.

[0014] Further, the spray dust suppression device further comprises a starter, the horizontal rotating platform, the fog gun and the driving motor are in electrical connection together, and the starter controls the working state of the horizontal rotating platform, the fog gun and the driving motor through the integrated controller in the starter.

[0015] Further, the farthest distance from the center point of the coal storage area of the output end of the fog gun is less than the effective spray range of the fog gun.

[0016] The present application has the following advantages: 1、The spray dust suppression device is installed on the coal yard fence, compared with the traditional spray dust suppression device installed on the top of the coal yard, the overall installation height is lower, and when maintaining, the coal yard fence can be used as support, so that the maintenance difficulty is smaller and the maintenance risk is lower.

[0017] 2、The three spray dust suppression devices are arranged in a specific manner, and the working parameters of the three spray dust suppression devices are associated with the parameters in the coal yard, so that the working parameters of the three spray dust suppression devices can be controlled in real time, and the horizontal rotating platform, the rotating shaft, the driving motor and other structures are arranged on the spray dust suppression device, so that the fog gun can rotate horizontally and the pitch angle can be changed, and the related linkage control is matched, so that when needed, the three spray dust suppression devices can be adjusted in terms of spray speed, horizontal reciprocating rotation and pitch angle according to the parameters in the coal yard, so that the spray area generated by the three spray dust suppression devices can completely cover the coal pile, and it is difficult to form a dust suppression dead angle, so that the dust suppression operation can be performed, and the dust suppression effect is good compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a distribution diagram of the initial position of the spray dust suppression device in the present application; Fig. 2 It is a state diagram of the spray dust suppression device in the present application in a clockwise rotation state; Fig. 3 It is a state diagram of the spray dust suppression device in the present application in a counterclockwise rotation state; Fig. 4 It is a structural diagram of the spray dust suppression device in the present application.

[0019] The reference signs in the drawings represent: 1, spray dust suppression device; 11, base; 12, horizontal rotating platform; 13, mounting bracket; 14, rotating shaft; 15, fog gun machine; 16, drive motor; 17, starter. DETAILED DESCRIPTION

[0020] The present application will be described in detail below in conjunction with the drawings and specific embodiments.

[0021] Embodiment: Please refer to Figs. 1-4 The present embodiment provides a coal yard full-area spray dust suppression method, comprising the following steps: First step: preparation before dust suppression; use common surveying and mapping instruments in the prior art, such as total station, etc. to survey and map the coal yard, so as to determine the center point of the coal yard coal discharge area and mark it accordingly, for subsequent searching.

[0022] Second step, install spray dust suppression device 1; prepare three spray dust suppression devices 1, in the present embodiment, the structure of the spray dust suppression device 1 is: The spray dust suppression device 1 comprises a base 11, the top of which is fixedly provided with a horizontal rotating platform 12, the top of which is a rotating part, a mounting bracket 13 in the shape of a "N" character is fixedly connected to the rotating part of the horizontal rotating platform 12, the horizontal rotating platform 12 can drive the mounting bracket 13 to reciprocatingly rotate horizontally, a fog gun machine 15 is movably mounted on the inner side of the mounting bracket 13 through a rotating shaft 14, the fog gun machine 15 can vertically pitch and swing on the mounting bracket 13 under the action of the rotating shaft 14, a drive motor 16 is also provided on the mounting bracket 13, the main shaft part of the drive motor 16 is in transmission connection with the rotating shaft 14, so that when the drive motor 16 starts to work, it can drive the rotating shaft 14 to rotate to adjust the pitch angle of the fog gun machine 15. A starter 17 is also fixedly provided on the mounting bracket 13, the horizontal rotating platform 12, the fog gun machine 15 and the drive motor 16 are all in electrical connection with the starter 17, the starter 17 can control the working state of the horizontal rotating platform 12, the fog gun machine 15 and the drive motor 16 through the integrated controller inside it. To ensure that the subsequent spray area generated by the fog gun machine 15 can completely cover the coal yard coal pile, and avoid dust escaping to the outside of the coal yard fence, the farthest distance from the coal yard coal storage area center point to the output end of the fog gun machine 15 should be less than the effective spray range of the fog gun machine 15.

[0023] After the preparation of the three spray dust suppression devices 1, take the center point of the coal yard coal storage area as the circle point and the coal yard fence as the boundary, install the three spray dust suppression devices 1 on the coal yard fence in a circular equidistant manner, to ensure the maximization of the coverage range of the spray area.

[0024] Third step: start dust suppression work; take the center point of the coal storage area as the initial position of the spray, start the spray dust suppression device 1, and the initial spray coverage area of the three spray dust suppression devices 1 forms an initial overlapping area at the center point of the coal storage area. At the same time, the height of the coal pile in the coal yard is measured by using visual sensors and other measuring sensors. According to the measured height of the coal pile in the coal yard, the driving motor 16 in each spray dust suppression device 1 is started to work, which drives the rotating shaft 14 to rotate to change the pitch angle of the fog gun machine 15, thereby adjusting the initial spray height of each spray dust suppression device 1, to ensure that the spray area generated by the three spray dust suppression devices 1 can completely cover the coal pile, and can prevent water resources and equipment energy waste caused by high spray height, and ensure effective spray dust settlement; The specific relationship between the height of the coal pile in the coal yard and the initial spray height of the three spray dust suppression devices 1 can be selected and set according to the actual use on site, which is not limited too much here.

[0025] Fourth step, parameter adjustment in dust suppression work; adjust the working parameters of each spray dust suppression device 1 in real time according to various parameters in the coal yard until the dust suppression is completed.

[0026] The specific adjustment method is: The anemometer is used to monitor the wind direction and wind speed of the coal yard in real time, and the spray speed of the two spray dust suppression devices 1 opposite to the wind direction of the coal yard is adjusted according to the real-time monitoring of the wind direction and wind speed of the coal yard, to prevent the natural wind from blowing away the water mist at the position opposite to the wind direction of the coal yard, and to ensure the dust suppression effect.

[0027] The calculation formula of the spray speed of the spray dust suppression device 1 and the wind speed of the coal yard is:

[0028] In the formula, V p is the actual spray speed of the spray dust suppression device 1, V b is the constant spray speed of the spray dust suppression device 1, K is the wind speed compensation coefficient, which is 0.5-1.2, and V w is the measured wind speed of the coal yard.

[0029] The laser dust detector is used to monitor the dust concentration of the coal yard from top to bottom in real time, and the pitch angle of the dust suppression device is reduced according to the real-time monitoring of the dust concentration at different height spaces, and the spray height is reduced, so that the dust concentration at different height spaces in the coal yard is reduced from top to bottom, and the spray covers the entire coal yard area, so that the dust above combines with the water mist and falls down to adsorb the dust below, thereby realizing efficient suppression of the dust in the coal yard.

[0030] The three spraying dust suppression devices 1 are driven to reciprocally rotate horizontally, and the rotating spraying areas of the three spraying dust suppression devices 1 are mutually crossed to form a motion overlapping area, so as to eliminate the spraying dead angle and prevent dust from escaping.

[0031] In the embodiment, the center point of the coal storage area of the coal yard is taken as a circle point, the horizontal plane azimuth angles of the three groups of spraying dust suppression devices 1 are 0°, 120° and 240° respectively, and the horizontal plane initial spraying direction angles are 180°, 300° and 60° respectively. Through the cooperative work of the three spraying dust suppression devices 1 which are circumferentially equidistantly arranged, it can be ensured that the spraying areas generated thereby can cover the entire coal yard area, the spraying dust suppression time is shortened, the dust raising is reduced, the coal yard dust suppression efficiency is improved, and the efficient suppression of the coal yard dust is realized.

[0032] In the embodiment, the horizontal rotation angle range of the spraying dust suppression device 1 on the horizontal plane is 90° clockwise and counterclockwise, that is, the rotation angle range of the horizontal rotation platform 12 is ±90°, the vertical pitching swing angle range of the spraying dust suppression device 1 is specifically the vertical pitching swing angle range of the fog gun machine 15 is -10° to +45°, and the three spraying dust suppression devices 1 are synchronously moved when reciprocally rotating horizontally and vertically pitching on the horizontal plane. By setting the horizontal rotation angle range of the spraying dust suppression device 1 on the horizontal plane to ±90°, it can be ensured that the spraying horizontal coverage angle of the spraying dust suppression device 1 can completely cover the entire coal yard, eliminate the spraying dead angle, prevent dust from escaping, and be suitable for coal yard spraying dust suppression in different terrains. By setting the vertical pitching swing angle range of the spraying dust suppression device 1 on the horizontal plane to -10° to +45°, it can adapt to different coal pile heights and wind influences, prevent coal powder from floating and accumulating on the facilities such as the coal yard roof and the power distribution room to cause fire, ensure that the spraying effectively settles dust, and also ensure that the spraying dust suppression device 1 will not be damaged due to the too large swing angle range.

[0033] In the embodiment, the spraying diffusion angle of each spraying dust suppression device 1 covers 120° of the initial overlapping area, so as to prevent the spraying air flows of the adjacent spraying dust suppression devices 1 from being mutually crossed to generate turbulent interference, thereby improving the effect of the coal yard spraying dust suppression and realizing the full-area dead-angle-free coverage of the coal yard.

[0034] The coal yard full-area spraying dust suppression method provided by the embodiment is characterized in that: three spraying dust suppression devices 1 are arranged in the coal yard in a circumferential equidistant manner, the spraying speed of two groups of spraying dust suppression devices 1 opposite to the wind direction of the coal yard is adjusted according to the real-time monitored wind direction and wind speed, the water mist at the position opposite to the wind direction of the coal yard is prevented from being blown away by the natural wind, the dust suppression effect is ensured, then the center point direction of the coal storage area of the coal yard is taken as the initial spraying position, the spraying dust suppression device 1 is started, the initial spraying height of the spraying dust suppression device 1 is adjusted according to the coal pile height to ensure that the spraying area covers the coal pile, and the vertical pitching and pitching swing angle range of the spraying dust suppression device 1 on the horizontal plane is specifically-10° to +45°, so that the water resource and equipment energy waste caused by the high spraying height can be prevented. Meanwhile, the three spraying dust suppression devices 1 arranged in a circumferential equidistant manner are driven to reciprocatingly rotate on the horizontal plane, the spraying horizontal coverage angle of the spraying dust suppression device 1 is adjusted, the angle range of the reciprocating rotation of the three spraying dust suppression devices 1 on the horizontal plane is ±90°, so that the spraying areas of the three spraying dust suppression devices 1 can be overlapped to form a motion overlap area, and the spraying dead angle can be eliminated. Finally, the dust concentration of the coal yard at different height spaces is monitored from top to bottom in real time according to the laser dust detector, after the dust concentration of the upper space meets the standard, the pitching angle of the dust suppression device is reduced, the spraying height is reduced, and the dust suppression is ended until the pitching angle of the spraying dust suppression device 1 is-10°, and the equipment stops running.

[0035] The coal yard full-area spraying dust suppression method provided by the embodiment can sequentially reduce the dust concentration of the coal yard at different height spaces from top to bottom, ensure that the spraying covers the whole coal yard area, eliminate the dust suppression dead angle, make the dust above combined with the water mist to fall downward to adsorb the dust below, shorten the spraying dust suppression time, reduce the water resource waste and equipment energy consumption, prevent the over-spraying or insufficient dust suppression in some areas, improve the coal yard dust suppression efficiency, and realize the efficient suppression of the coal yard dust.

[0036] In the description of the application, it is to be understood that the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, the term "comprise" and any variations thereof are intended to cover non-exclusive inclusion.

[0037] The above is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A method for spraying dust suppression in the entire coal yard, characterized by: It includes the following steps: Step A1: Preparation before dust suppression; conduct a surveying and mapping of the coal yard to determine the center point of the coal discharging area of the coal yard; Step A2: Install the spray dust suppression device (1); prepare three spray dust suppression devices (1), and with the center point of the coal storage area of the coal yard as the center and the coal yard enclosure as the boundary, install the three spray dust suppression devices (1) equidistantly in a circle on the coal yard enclosure; Step A3: Start the dust suppression work; with the direction towards the center point of the coal storage area of the coal yard as the initial spray position, start the spray dust suppression device (1). The initial spray coverage areas of the three spray dust suppression devices (1) form an initial overlapping area at the center point of the coal storage area of the coal yard. At the same time, measure the height of the coal pile in the coal yard and adjust the initial spray height of each spray dust suppression device (1) according to the measured height of the coal pile in the coal yard; Step A4: Parameter adjustment during the dust suppression work; combine various parameters in the coal yard to adjust the working parameters of each spray dust suppression device (1) in real time until the dust suppression ends.

2. The method for spraying dust suppression in the entire coal yard according to claim 1, characterized in that: The specific parameter adjustment in Step A4 includes the following steps: Step A41: Monitor the wind direction and wind speed of the coal yard in real time, and adjust the spray speeds of the two spray dust suppression devices (1) opposite to the wind direction of the coal yard according to the real-time monitored wind direction and wind speed of the coal yard; Step A42: Monitor the dust concentration of the coal yard from top to bottom in real time, and adjust the real-time spray height of each spray dust suppression device (1) according to the real-time monitored dust concentration of the coal yard; Step A43: Drive the spray ends of the three spray dust suppression devices (1) to rotate horizontally back and forth, so that the rotating spray areas of the three spray dust suppression devices (1) cross each other to form a moving overlapping area.

3. A method for spraying dust suppression in the entire coal yard according to claim 2, characterized in that: The calculation formula for the spray speed of the spray dust suppression device (1) and the wind speed of the coal yard in Step 41 is: Where V p is the actual spray velocity of the spray dust suppression device (1), V b is the constant spray velocity of the spray dust suppression device (1), K is the wind speed compensation coefficient, V w It is the measured wind speed in the coal yard.

4. The method for spraying dust suppression in the entire coal yard according to claim 3, characterized in that: In Step 41, the wind speed compensation coefficient K takes 0.5 - 1.

2.

5. The method for spraying dust suppression in the entire coal yard according to claim 1, characterized in that: The horizontal plane azimuth angles of the spray ends of the three spray dust suppression devices (1) are circular with the center point of the coal storage area of the coal yard as the center, and are 0°, 120° and 240° respectively. The initial spray angles of the spray ends of the three spray dust suppression devices (1) are set to be different from each other.

6. A method for spraying dust suppression in the entire coal yard according to claim 5, characterized in that: The spray diffusion angle of each spray dust suppression device (1) covers 120° of the circumference of the initial overlapping area.

7. The method for spraying dust suppression in the entire coal yard according to claim 1, characterized in that: The angle range of the reciprocating horizontal rotation of each spray dust suppression device (1) is ±90°, and the angle range of the vertical pitching swing of the spray end of each spray dust suppression device (1) is -10° to +45°.

8. The method for spraying dust suppression in the entire coal yard according to claim 1, characterized in that: The spray dust suppression device (1) includes a base (11). A horizontal rotation platform (12) is arranged on the top of the base (11). The top of the horizontal rotation platform (12) is connected with an installation bracket (13) arranged in a "凵" - shaped structure. The horizontal rotation platform (12) can drive the installation bracket (13) to rotate horizontally back and forth. A fog cannon machine (15) is movably installed inside the installation bracket (13) through a rotating shaft (14). The fog cannon machine (15) can swing vertically俯仰摆动 on the installation bracket (13) under the action of the rotating shaft (14). A driving motor (16) is also arranged on the installation bracket (13), and the main shaft part of the driving motor (16) is传动连接在一起 with the rotating shaft (14).

9. The method for spraying dust suppression in the entire coal yard according to claim 8, characterized in that: The spray dust suppression device (1) further includes a starter (17), and the horizontal rotating platform (12), the fog cannon (15) and the drive motor (16) are all electrically connected to the starter (17). The starter (17) controls the working states of the horizontal rotating platform (12), the fog cannon (15) and the drive motor (16) through an integrated controller inside the starter (17).

10. The method for spraying dust suppression in the entire coal yard according to claim 8, characterized in that: The maximum distance between the output end of the fog cannon (15) and the center point of the coal storage area in the coal yard is less than the effective spray range of the fog cannon (15).

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