A spray dust suppression device for raw coal bunker

Abstract

The present invention provides a raw coal bunker spray dust suppression device, which relates to the technical field of raw coal bunker dust suppression equipment, and comprises: a bottom plate, a support frame, a raw coal bunker body, a spray lifting mechanism, a rotary spray mechanism, a driving and hedging mechanism, a water supply mechanism and a control box. The support frame is fixedly installed at the top center of the bottom plate, the raw coal bunker body is fixedly provided on the support frame, the top of the raw coal bunker body is fixedly provided with a spray lifting mechanism, the rotary spray mechanism is fixedly provided on the spray lifting mechanism, the input end of the rotary spray mechanism is fixedly connected to the driving and hedging mechanism, the top of the rotary spray mechanism is fixedly connected to the water supply mechanism, the spray lifting mechanism, the rotary spray mechanism, the water supply mechanism and the control box are electrically connected respectively, and all-round coverage of water mist is achieved through the rotary spray mechanism, thereby effectively suppressing the flying of dust in the raw coal bunker; the spray lifting mechanism can adjust the spray height according to actual needs to adapt to the dust suppression needs at different heights, thereby ensuring the health of the operator.

Description

Technical Field

[0001] The invention relates to the technical field of raw coal bunker dust suppression equipment, and in particular to a raw coal bunker spray dust suppression device. Background Art

[0002] In some power plants, due to the old structure of the raw coal bunker and the poor coal quality, the coal bunker frequently hangs on the wall, causing coal shortage in the coal mill, affecting the normal operation of the unit. The number of bunker cleanings also increases significantly during the normal operation of the unit. When cleaning the raw coal bunker, when the coal bunker drops to a low coal level, it is necessary to use air cannons to clean the coal hanging on the wall.

[0003] However, firing air cannons at low coal levels will cause a large amount of smoke and dust to be generated in the coal bunker, and the wall hanging situation cannot be checked through the observation hole on the top of the coal bunker. It is necessary to stand still for a long time until the smoke and dust dissipate before the internal situation of the coal bunker can be clearly checked, which greatly reduces efficiency. In addition, the grinding group is not in a standby state during the standing process, which has a certain impact on the safe operation of the unit. Therefore, a device suitable for spray dust suppression in the raw coal bunker is needed. The existing dust suppression devices are all temporarily carried out by manually moving the sprayer to the top of the raw coal bunker for dust suppression, and they are all fixed on the top, which cannot achieve the best dust suppression effect, and will cause dust to fly out of the raw coal bunker to pollute the air, thereby endangering the health of the operator. Summary of the invention

[0004] The present invention provides a raw coal bunker spray dust suppression device to solve the technical problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention provides a raw coal bunker spray dust suppression device, including: a base plate, a support frame, a raw coal bunker body, a spray lifting mechanism, a rotary spray mechanism, a drive and hedging mechanism, a water supply mechanism and a control box. The support frame is fixedly installed at the top center of the base plate, the raw coal bunker body is fixedly provided on the support frame, the top of the raw coal bunker body is fixedly provided with a spray lifting mechanism, the rotary spray mechanism is fixedly provided on the spray lifting mechanism, the input end of the rotary spray mechanism is fixedly connected to the drive and hedging mechanism, the top of the rotary spray mechanism is fixedly connected to the water supply mechanism, and the spray lifting mechanism, the rotary spray mechanism, the water supply mechanism and the control box are electrically connected respectively.

[0006] Preferably, the raw coal bin body comprises: a raw coal bin body, a vertical raw coal bin body fixedly installed on the top of the support frame, a conical discharge pipe fixedly provided at the bottom of the raw coal bin body, a level meter fixedly installed on the conical discharge pipe, an electric unloading valve fixedly installed on the conical discharge pipe, and a horizontal covering plate fixedly installed on the top of the raw coal bin body.

[0007] Preferably, the spray lifting mechanism comprises: a gantry frame 1, a gantry frame 1 along the left and right directions is fixedly installed on the top of the covering plate, a pair of mounting plates spaced apart on the left and right are fixedly installed on the bottom end of the top of the gantry frame 1, the left and right mounting plates are centrally rotatably connected to a rope winding roller, the right end of the axis of the rope winding roller is fixedly connected to the output shaft end of the lifting motor, the lifting motor is fixedly connected to the mounting plate on the right side, a fixed plate 1 is fixedly connected to the upper part of the left and right inner walls of the gantry frame 1, a fixed plate 2 is fixedly installed below the fixed plate 1 corresponding to the left and right inner walls of the raw coal bin body, a vertical guide rod is fixedly installed between the fixed plate 1 and the fixed plate 2 on each side, the guide rods on the left and right sides are respectively connected to a sleeve 1 by sliding up and down, a crossbeam 1 is fixedly connected in the middle of the left and right sleeves, a bracket 1 is fixedly installed on the top of the crossbeam 1, and the top of the bracket 1 is fixedly connected to the rope winding roller through a cable.

[0008] Preferably, the rotary spray mechanism comprises: a rotary vertical tube, a rotary vertical tube rotatably connected to the middle part of the cross beam, the top of the rotary vertical tube is fixedly connected to a rotary joint, the top of the rotary joint is rotary hingedly connected to a water inlet pipe, the water inlet pipe is fixedly connected to a bracket, the upper part of the rotary vertical tube is symmetrically fixedly connected to a pair of horizontal spray pipes, the bottom of each spray pipe is fixedly connected to a plurality of atomizing nozzles, an electromagnetic valve is fixedly installed at the connection between the spray pipe and the rotary vertical tube, and the end of the spray pipe away from the rotary vertical tube is fixedly connected to vertical tube 2.

[0009] Preferably, the vertical pipe 2 is fixedly connected to a plurality of atomizing nozzles 2 along the up and down directions near the side of the raw coal bin body, the middle part of the rotating vertical pipe is symmetrically fixedly connected to the spray pipe 2 along the left and right directions, the bottom end of the rotating vertical pipe is fixedly connected to the spray pipe 3 along the left and right directions, the spray pipe 2 and the spray pipe 3 are respectively fixedly connected to a plurality of atomizing nozzles 3 at equal intervals along the left and right directions, the spray pipe 2 is fixedly installed with an electromagnetic valve 2, and the spray pipe 3 is fixedly installed at the connection between the spray pipe 3 and the rotating vertical pipe, the spray pipe 1, the spray pipe 2 and the spray pipe 3 decrease in length from top to bottom, and a distance sensor 1 is fixedly installed at the front end center of the spray pipe 3.

[0010] Preferably, the driving and hedging mechanism includes: a driving motor, a vertical driving motor fixedly installed on the horizontal beam 1 at the bottom end on the left side of the rotating vertical tube, the output shaft end of the driving motor is fixedly connected to a vertical rotating shaft 1, the rotating shaft 1 rotates along the up and down directions and passes through the horizontal beam 1, the rotating shaft 1 is fixedly connected to a pulley 1 and a spur gear 1 in sequence from top to bottom, the top of the rotating vertical tube is fixedly connected to a pulley 2 and a spur gear 2 in sequence from top to bottom, the spur gear 1 is meshingly connected with the spur gear 2, and the horizontal beam 1 is symmetrically fixed with two sets of air supply mechanisms.

[0011] Preferably, the air supply mechanism on the left side includes: a rotating shaft 2, the left section of the horizontal beam 1 is rotatably connected to the vertical rotating shaft 2, the bottom end of the rotating shaft 2 is fixedly connected to the fan blade, the top end of the rotating shaft 2 is fixedly connected to the pulley 3, the pulley 3 on the left side is connected to the pulley 1 through the belt 1, and the pulley 3 on the right side is connected to the pulley 2 through the belt 2, the outer fixed sleeve of the fan blade is provided with an air collecting tube, and the top end of the air collecting tube is fixedly connected to the horizontal beam 1.

[0012] Preferably, the water supply mechanism includes: a water tank, the water tank is fixedly installed on the left outer wall of the raw coal bin body, a high-pressure water supply pump is fixedly installed on the left end of the covering plate, the left water inlet end of the high-pressure water supply pump is fixedly connected to the water tank through a water supply pipe, the right end of the high-pressure water supply pump is fixedly connected to the water inlet pipe through a water supply hose, the left end axis of the rope winding roller is fixedly connected to the pipe winding roller, and the water supply hose is wound around the pipe winding roller.

[0013] Preferably, an intelligent dust suppression detection and alarm module is also provided, and the intelligent dust suppression detection and alarm module includes:

[0014] Temperature detection unit 1, used to detect the ambient temperature value inside the raw coal bunker when a raw coal bunker spray dust suppression device is in operation;

[0015] Density detection unit 1, used to detect the density value of the water mist sprayed by the rotary atomizing nozzle;

[0016] Density detection unit 2 is used to sample and detect the density value of dust particles in the raw coal bin;

[0017] Density detection unit three, used to detect the density value of water in the rotating vertical pipe;

[0018] Flow rate detection unit 1, used to detect the flow rate value of the droplets sprayed downward during operation;

[0019] Flow rate detection unit 2 is used to detect the upward flow rate of dust particles;

[0020] Concentration detection unit, used to detect the mixed concentration value of water mist and dust particles in the raw coal bunker;

[0021] Alarm, used to give an alarm in case of abnormal situation;

[0022] The first calculation unit calculates the dust reduction efficiency of the spray field of the j-th atomizing nozzle in the raw coal bin body based on the data of the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2 and the concentration detection unit;

[0023] The second calculation unit calculates a sum evaluation value of the superposition of the overall dust capture efficiency in all spray fields of the rotary spray mechanism based on the calculation result of the first calculation unit.

[0024] A control unit, used to collect and process the data of each detection unit and sensor, the control unit is electrically connected to the temperature detection unit 1, the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2, the concentration detection unit and the alarm respectively;

[0025] A comparison and judgment unit, used for comparing and judging whether the sum of the evaluation values ​​of the superposition of the overall dust capture efficiency in all the spray fields of the rotary spray mechanism is within a preset threshold range;

[0026] Preferably, the first calculation unit calculates based on the following formula 1:

[0027] Where: η j is the dust reduction efficiency of the spray field of the jth atomizing nozzle in the raw coal bunker, S t is the inertial collision coefficient of large dust particles and water mist, S t >0.3, K r is the relative size ratio of small dust particles to droplets, K r <0.1, v 0 is the average downward velocity of the droplets detected by velocity detection unit 1, v 1 is the average value of the upward flow velocity of dust detected by the flow velocity detection unit 2, (v 0 -v 1 ) is the average velocity of the relative motion between dust particles and droplets, d s is the diameter of the droplets sprayed by the atomizing nozzle, ρ is the density of the water mist detected by the density detection unit 1, μ is the air dynamic viscosity coefficient, which is 0.5, D is the internal diameter of the raw coal bin, C S is the mixed concentration value of water mist and dust particles in the raw coal bunker detected by the concentration detection unit, d y is the diameter of dust particles, ρ 2 It is the dust density value detected by density detection unit 2.

[0028] The second calculation unit calculates based on the following formula 2:

[0029]

[0030] Where: λ is the sum of the total dust capture efficiency of all spray fields in the rotary spray mechanism, Q Y is the preset water mist flow value of the atomizing nozzle, ∏ is the multiplication symbol, j is the jth atomizing nozzle, n is the number of atomizing nozzles, C q is the flow coefficient of water in the rotating vertical pipe, C q <0.3, d is the nozzle diameter, P is the water supply pressure of the high-pressure water supply pump, ρ 3is the density value of water in the rotating vertical tube detected by density detection unit 3, T 1 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 at the beginning of spraying, T 2 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 when the spraying is terminated, T max is the maximum ambient temperature in the raw coal bunker detected by the temperature detection unit 1, T min The minimum ambient temperature in the raw coal bunker detected by the temperature detection unit 1; ln is a logarithmic function, and e is a natural constant with a value of 2.72;

[0031] The comparison and judgment unit performs a comparison and judgment. When λ is greater than or equal to the preset threshold range, the dust suppression effect is met and the alarm does not respond. When λ is less than the preset threshold range, the control unit controls the alarm to sound an alarm and at the same time controls the shutdown of the high-pressure water supply pump for easy maintenance.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a raw coal bunker spray dust suppression device, in which the raw coal bunker body is fixedly installed through a bottom plate and a support frame, and the top of the raw coal bunker body is connected to a rotary spray mechanism through a spray lifting mechanism. The rotary spray mechanism is driven to rotate by a driving and hedging mechanism, and at the same time obtains water from a water supply mechanism for spraying. The control box is responsible for controlling the operation of the entire device, including the start and stop of the spray lifting mechanism, the rotary spray mechanism, and the water supply mechanism, as well as the adjustment of the spray parameters.

[0033] Beneficial effects:

[0034] Efficient dust suppression: The rotating spray mechanism achieves all-round coverage of water mist, effectively suppressing the flying dust in the raw coal bin.

[0035] Flexible adjustment: The spray lifting mechanism can adjust the spray height according to actual needs to adapt to dust suppression needs at different heights.

[0036] Automatic control: The entire device is automatically controlled through the control box, which reduces the difficulty of manual operation, improves work efficiency and ensures the health of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a front cross-sectional schematic diagram of a raw coal bunker spray dust suppression device of the present invention;

[0039] Figure 2 It is a front view schematic diagram of the top structure of a spray dust suppression device for a raw coal bunker of the present invention;

[0040] Figure 3 yes Figure 2 Schematic diagram of the partial enlargement of point A in the middle.

[0041] Reference numerals:

[0042] 1. Bottom plate; 2. Support frame; 3. Raw coal bunker body; 301. Raw coal bunker body; 302. Conical discharge pipe; 303. Material level meter; 304. Electric discharge valve; 305. Covering plate; 4. Spray lifting mechanism; 401. Gantry frame one; 402. Mounting plate; 403. Rope roller; 404. Lifting motor; 405. Fixed plate one; 406. Fixed plate two; 407. Guide rod; 408. Casing one; 409. Crossbeam one; 410. Bracket one; 411. Cable; 5. Rotary spray mechanism; 501. Rotary vertical pipe; 502. Rotary joint; 503. Water inlet pipe; 504. Spray pipe one; 505. Atomizing nozzle one; 506. Solenoid valve one; 507. Vertical pipe two; 508. Atomizing nozzle one Nozzle 2; 509, spray pipe 2; 510, atomizing nozzle 3; 511, solenoid valve 2; 512, spray pipe 3; 513, solenoid valve 3; 514, distance sensor 1; 6, driving and hedging mechanism; 601, driving motor; 602, rotating shaft 1; 603, pulley 1; 604, spur gear 1; 605, pulley 2; 606, spur gear 2; 607, air supply mechanism; 6071, rotating shaft 2; 6072, fan blade; 6073, pulley 3; 6074, belt 1; 6075, belt 2; 6076, air collecting tube; 7, water supply mechanism; 701, water storage tank; 702, high-pressure water supply pump; 703, water supply pipe; 704, water supply hose; 705, pipe roller; 8, control box. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present invention provides the following embodiments

[0047] Example 1

[0048] The embodiment of the present invention provides a raw coal bunker spray dust suppression device, such as Figure 1-Figure 2 As shown, a base plate 1, a support frame 2, a raw coal bin body 3, a spray lifting mechanism 4, a rotary spray mechanism 5, a drive and hedging mechanism 6, a water supply mechanism 7 and a control box 8, the support frame 2 is fixedly installed at the top center of the base plate 1, the support frame 2 is fixedly provided with a raw coal bin body 3, the top of the raw coal bin body 3 is fixedly provided with a spray lifting mechanism 4, the spray lifting mechanism 4 is fixedly provided with a rotary spray mechanism 5, the input end of the rotary spray mechanism 5 is fixedly connected to the drive and hedging mechanism 6, the top of the rotary spray mechanism 5 is fixedly connected to the water supply mechanism 7, and the spray lifting mechanism 4, the rotary spray mechanism 5, the water supply mechanism 7 and the control box 8 are electrically connected respectively.

[0049] The working principle and beneficial effects of the above technical solution are:

[0050] Working principle:

[0051] The raw coal bunker spray dust suppression device provided by the present invention is fixedly installed with a raw coal bunker body 3 through a bottom plate 1 and a support frame 2, and the top of the raw coal bunker body 3 is connected to a rotary spray mechanism 5 through a spray lifting mechanism 4. The rotary spray mechanism 5 is driven to rotate by a driving and hedging mechanism 6, and at the same time obtains water from a water supply mechanism 7 for spraying. The control box 8 is responsible for controlling the operation of the entire device, including the start and stop of the spray lifting mechanism 4, the rotary spray mechanism 5, and the water supply mechanism 7, and the adjustment of the spray parameters.

[0052] Beneficial effects:

[0053] Highly efficient dust suppression: The rotating spray mechanism 5 achieves all-round coverage of water mist, effectively suppressing the flying of dust in the raw coal bin.

[0054] Flexible adjustment: The spray lifting mechanism 4 can adjust the spray height according to actual needs to adapt to the dust suppression needs at different heights.

[0055] Automatic control: The entire device is automatically controlled through the control box 8, which reduces the difficulty of manual operation and improves work efficiency.

[0056] Example 2

[0057] On the basis of Example 1, Figure 1-Figure 2 As shown, the raw coal bin body 3 includes: a raw coal bin body 301, the vertical raw coal bin body 301 is fixedly installed on the top of the support frame 2, a conical discharge pipe 302 is fixedly provided at the bottom of the raw coal bin body 301, a level meter 303 is fixedly installed on the conical discharge pipe 302, an electric unloading valve 304 is fixedly installed on the conical discharge pipe 302, and a horizontal covering plate 305 is fixedly installed on the top of the raw coal bin body 301.

[0058] The spray lifting mechanism 4 includes: a gantry 401, the top of the cover plate 305 is fixedly installed with a gantry 401 along the left and right directions, a pair of mounting plates 402 are fixedly installed at the top and bottom of the gantry 401, and the left and right mounting plates 402 are centrally connected to a rope roller 403, the right end of the axis of the rope roller 403 is fixedly connected to the output shaft end of the lifting motor 404, and the lifting motor 404 is fixedly connected to the mounting plate 402 on the right side, and the upper part of the left and right inner walls of the gantry 401 is fixedly connected to the fixing plate 402. 405, the left and right inner walls of the raw coal bin body 301 correspond to the fixed plate 2 406 fixedly installed below the fixed plate 1 405, and a vertical guide rod 407 is fixedly installed between the fixed plate 1 405 and the fixed plate 2 406 on each side, and the guide rods 407 on the left and right sides are respectively slid up and down to connect the sleeve 1 408, and the middle of the left and right sleeves 1 408 is fixedly connected with a cross beam 1 409, and a bracket 1 410 is fixedly installed on the top of the cross beam 1 409, and the top of the bracket 1 410 is fixedly connected to the rope winding roller 403 through a cable 411.

[0059] The working principle and beneficial effects of the above technical solution are:

[0060] Working principle:

[0061] On the basis of Example 1, this embodiment designs the raw coal bin body 3 and the spray lifting mechanism 4 in detail. The raw coal bin body 3 includes a vertical raw coal bin body 301 and a conical discharge pipe 302, which is convenient for the entry and exit of materials and the monitoring of the material level. The spray lifting mechanism 4 realizes the lifting and lowering of the spray mechanism through the gantry 401, the mounting plate 402, the rope roller 403, the lifting motor 404 and other components. At the same time, the guide rod 407 and the sleeve 408 ensure the stability during the lifting process. During specific operation, the control box 8 controls the operation of the lifting motor 404, and the lifting motor 404 drives the rope roller 403 to rotate downward to release the cable 411. Under the action of gravity, the bracket 410, the beam 409, and the accompanying sleeve 408 slide down synchronously along the guide rod 407 to the target height for spray dust suppression, thereby improving the dust suppression effect.

[0062] Beneficial effects:

[0063] Stable structure: The spray lifting mechanism 4 is reasonably designed to ensure the stability and safety of the spray mechanism during the lifting process.

[0064] Material level monitoring: The material level meter 303 on the conical discharge pipe 302 can monitor the material level in real time and provide accurate data support for spray dust suppression.

[0065] Easy to maintain: The whole device has a clear structure and its parts are easy to disassemble and replace, which reduces maintenance costs.

[0066] Example 3

[0067] On the basis of Example 2, Figure 1-Figure 3 As shown, the rotary spray mechanism 5 includes: a rotary vertical pipe 501, a rotary vertical pipe 501 rotatably connected to the middle of the cross beam 409, the top of the rotary vertical pipe 501 is fixedly connected to a rotary joint 502, the top of the rotary joint 502 is rotatably hinged to a water inlet pipe 503, the water inlet pipe 503 is fixedly connected to a bracket 410, the upper part of the rotary vertical pipe 501 is symmetrically fixedly connected to a pair of horizontal spray pipes 504, the bottom of each spray pipe 504 is fixedly connected to a plurality of atomizing nozzles 505, a solenoid valve 506 is fixedly installed at the connection between the spray pipe 504 and the rotary vertical pipe 501, and one end of the spray pipe 504 away from the rotary vertical pipe 501 is fixedly connected to a vertical pipe 2 507.

[0068] The vertical pipe 2 507 is fixedly connected to a plurality of atomizing nozzles 2 508 along the up and down directions near the raw coal bin body 301, the middle part of the rotating vertical pipe 501 is symmetrically fixedly connected to the spray pipe 2 509 along the left and right directions, the bottom end of the rotating vertical pipe 501 is fixedly connected to the spray pipe 3 512 along the left and right directions, the spray pipe 2 509 and the spray pipe 3 512 are respectively fixedly connected to a plurality of atomizing nozzles 3 510 at equal intervals along the left and right directions, the spray pipe 2 509 is fixedly installed with a solenoid valve 2 511, and the spray pipe 3 512 is fixedly installed at the connection between the spray pipe 3 512 and the rotating vertical pipe 501, the spray pipe 1 504, the spray pipe 2 509 and the spray pipe 3 512 decrease in length from top to bottom, and a distance sensor 1 514 is fixedly installed at the front end center of the spray pipe 3 512.

[0069] The working principle and beneficial effects of the above technical solution are:

[0070] Working principle:

[0071] On the basis of Example 2, this embodiment designs a rotary spray mechanism 5 in detail. The rotary spray mechanism 5 includes a rotary vertical pipe 501, a rotary joint 502, a water inlet pipe 503, a spray pipe 1 504, an atomizing nozzle 1 505 and other components. Driven by the drive motor 601, the rotary vertical pipe 501 drives the spray pipe 1 504 and the atomizing nozzle 1 505 to rotate; at the same time, the vertical pipe 2 507 and the atomizing nozzle 2 508 rotate synchronously with the spray pipe 1 504 to spray, suppressing the dust particles close to the inner wall of the raw coal bin 301, and achieving all-round coverage of water mist. At the same time, the solenoid valve 1 506, the solenoid valve 2 511 and the solenoid valve 3 513 respectively control the water mist spraying on different spray pipes, which improves the flexibility and accuracy of the spray and saves water. Each spray pipe is shortened from top to bottom, perfectly adapting to the conical structure of the bottom of the raw coal bin 301, and the distance sensor 1 514 provides height data support for the descent.

[0072] Beneficial effects:

[0073] Uniform spray: Through the design of the rotating spray mechanism 5 and multiple atomizing nozzles, uniform distribution of water mist is achieved, thereby improving the dust suppression effect.

[0074] Precise control: The addition of the solenoid valve improves the accuracy of the spray, and the spray volume and spray range can be adjusted according to actual needs.

[0075] Strong adaptability: the lengths of the spray pipe 1 504, the spray pipe 2 509 and the spray pipe 3 512 decrease from top to bottom, thus meeting the dust suppression requirements at different heights.

[0076] Example 4

[0077] On the basis of Example 2, Figure 1-Figure 3As shown, the driving and hedging mechanism 6 includes: a driving motor 601, a vertical driving motor 601 fixedly installed on the bottom end of the left side of the rotating vertical tube 501 on the beam 1 409, the output shaft end of the driving motor 601 is fixedly connected to a vertical rotating shaft 1 602, the rotating shaft 1 602 rotates along the up and down directions and passes through the beam 1 409, the rotating shaft 1 602 is fixedly connected to a pulley 1 603 and a spur gear 1 604 in sequence from top to bottom, the top of the rotating vertical tube 501 is fixedly connected to a pulley 2 605 and a spur gear 2 606 in sequence from top to bottom, the spur gear 1 604 is meshedly connected with the spur gear 2 606, and the beam 1 409 is symmetrically fixed with two sets of air supply mechanisms 607.

[0078] The air supply mechanism 607 on the left side includes: a second rotating shaft 6071, the left section of the horizontal beam 1 409 is rotatably connected to the vertical second rotating shaft 6071, the bottom end of the second rotating shaft 6071 is fixedly connected to the fan blade 6072, the top of the second rotating shaft 6071 is fixedly connected to the pulley three 6073, the pulley three 6073 on the left side is connected to the pulley one 603 through the belt one 6074, and the pulley three 6073 on the right side is connected to the pulley two 605 through the belt two 6075, and the outer fixed sleeve of the fan blade 6072 is provided with an air collecting tube 6076, and the top of the air collecting tube 6076 is fixedly connected to the horizontal beam 1 409.

[0079] The water supply mechanism 7 includes: a water tank 701, the water tank 701 is fixedly installed on the left outer wall of the raw coal bin body 301, a high-pressure water supply pump 702 is fixedly installed on the left end of the cover plate 305, the left water inlet end of the high-pressure water supply pump 702 is fixedly connected to the water tank 701 through a water supply pipe 703, the right end of the high-pressure water supply pump 702 is fixedly connected to the water inlet pipe 503 through a water supply hose 704, the left end axis of the rope winding roller 403 is fixedly connected to the pipe winding roller 705, and the water supply hose 704 is wound around the pipe winding roller 705.

[0080] The working principle and beneficial effects of the above technical solution are:

[0081] Working principle:

[0082] On the basis of Example 2, this embodiment designs a driving and hedging mechanism 6 and a water supply mechanism 7. The driving and hedging mechanism 6 realizes the rotation and hedging effect of the rotary spray mechanism 5 by driving the motor 601, the pulley, the spur gear and other components. When working, the driving motor 601 drives the rotating shaft 1 602, the pulley 1 603 and the spur gear 1 604 to rotate synchronously, the spur gear 1 604 meshes and drives the spur gear 2 606, the rotating vertical pipe 501 and the pulley 2 605 to rotate synchronously, the pulley 1 603 drives the pulley 3 6073 on the left side to rotate through the belt 1 6074, the pulley 2 605 drives the pulley 3 6073 on the right side to rotate through the belt 2 6075, the pulley 3 6073 drives the rotating shaft 2 6071 and the fan blade 6072 to rotate synchronously to form a downward flowing wind, which blows away the water mist while realizing the downward hedging of dust particles and accelerating the fusion and dust reduction. The wind collecting tube 6076 is responsible for concentrating the flowing wind. The water supply mechanism 7 includes a water tank 701, a high-pressure water supply pump 702, a water supply pipe 703 and other components, which provide a stable water source and spray pressure for the rotary spray mechanism 5. When working, the hose roller 705 rotates synchronously with the rope roller 403, and the hose roller 705 lowers the water supply hose 704 wrapped thereon synchronously. The high-pressure water supply pump 702 works according to preset parameters, and the clean water flows from the water tank 701 through the water supply pipe 703, the water supply hose 704, the water inlet pipe 503, the rotary joint 502, the rotary vertical pipe 501 and finally reaches each spray pipe, and finally sprays water mist through each atomizing nozzle.

[0083] Beneficial effects:

[0084] Strong power: The addition of the driving motor 601 provides strong power for the rotary spray mechanism 5, ensuring the continuity and stability of the spray.

[0085] Stable water supply: The water supply mechanism 7 is reasonably designed to ensure a stable water supply to the rotary spray mechanism 5 during the spraying process.

[0086] Good counteracting effect: through the transmission of the pulley and the spur gear, the counteracting effect of the water mist in the rotary spray mechanism 5 and the dust particles is achieved, further improving the dust suppression effect.

[0087] Example 5

[0088] On the basis of Example 1, an intelligent dust suppression detection and alarm module is further provided, and the intelligent dust suppression detection and alarm module includes:

[0089] Temperature detection unit 1, used to detect the ambient temperature value in the raw coal bunker body 301 when a raw coal bunker spray dust suppression device is in operation;

[0090] Density detection unit 1, used to detect the density value of the water mist sprayed by the rotary atomizing nozzle;

[0091] Density detection unit 2, used for sampling and detecting the density value of dust particles in the raw coal bin 301;

[0092] Density detection unit three, used to detect the density value of water in the rotating vertical pipe 501;

[0093] Flow rate detection unit 1, used to detect the flow rate value of the droplets sprayed downward during operation;

[0094] Flow rate detection unit 2 is used to detect the upward flow rate of dust particles;

[0095] A concentration detection unit, used to detect the mixed concentration value of water mist and dust particles in the raw coal bin 301;

[0096] Alarm, used to give an alarm in case of abnormal situation;

[0097] The first calculation unit calculates the dust reduction efficiency of the spray field of the j-th atomizing nozzle in the raw coal bin 301 based on the data of the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2 and the concentration detection unit;

[0098] The second calculation unit calculates the sum evaluation value of the superposition of the overall dust capture efficiency in all the spray fields of the rotary spray mechanism 5 based on the calculation result of the first calculation unit.

[0099] A control unit, used to collect and process the data of each detection unit and sensor, the control unit is electrically connected to the temperature detection unit 1, the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2, the concentration detection unit and the alarm respectively;

[0100] A comparison and judgment unit, used for comparing and judging whether the sum of the evaluation values ​​of the superposition of the overall dust capture efficiency in all the spray fields of the rotary spray mechanism 5 is within a preset threshold range;

[0101] The first calculation unit calculates based on the following formula 1:

[0102] Where: η j is the dust reduction efficiency of the spray field of the jth atomizing nozzle in the raw coal bin 301, S t is the inertial collision coefficient of large dust particles and water mist, S t >0.3, K r is the relative size ratio of small dust particles to droplets, K r <0.1, v 0 is the average downward velocity of the droplets detected by velocity detection unit 1, v 1 is the average value of the upward flow velocity of dust detected by the flow velocity detection unit 2, (v 0 -v1 ) is the average velocity of the relative motion between dust particles and droplets, d s is the diameter of the droplets sprayed by the atomizing nozzle, ρ is the density of the water mist detected by the density detection unit 1, μ is the air dynamic viscosity coefficient, which is 0.5, D is the inner diameter of the raw coal bin 301, C S is the mixed concentration value of water mist and dust particles in the raw coal bin 301 detected by the concentration detection unit, d y is the diameter of dust particles, ρ 2 It is the dust density value detected by density detection unit 2.

[0103] The second calculation unit calculates based on the following formula 2:

[0104]

[0105] Where: λ is the sum of the evaluation values ​​of the capture efficiency of the entire dust in all the spray fields of the rotary spray mechanism 5, Q Y is the preset water mist flow value of the atomizing nozzle, ∏ is the multiplication symbol, j is the jth atomizing nozzle, n is the number of atomizing nozzles, C q is the flow coefficient of water in the rotating vertical pipe 501, C q <0.3, d is the nozzle diameter, P is the water supply pressure value of the high-pressure water supply pump 702, ρ 3 is the density value of water in the rotating vertical tube 501 detected by the density detection unit 3, T 1 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 at the beginning of spraying, T 2 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 when the spraying is terminated, T max is the maximum ambient temperature in the raw coal bunker detected by the temperature detection unit 1, T min The minimum ambient temperature in the raw coal bunker detected by the temperature detection unit 1; ln is a logarithmic function, and e is a natural constant with a value of 2.72;

[0106] The comparison and judgment unit performs a comparison and judgment. When λ is greater than or equal to the preset threshold range, the dust suppression effect is met and the alarm does not respond. When λ is less than the preset threshold range, the control unit controls the alarm to sound an alarm and at the same time controls the shutdown of the high-pressure water supply pump 702 for easy maintenance.

[0107] The working principle and beneficial effects of the above technical solution are as follows: Working principle:

[0108] On the basis of Example 1, this example adds an intelligent dust suppression detection and alarm module. The module includes components such as a temperature detection unit, a density detection unit, a flow rate detection unit, a concentration detection unit, an alarm, a calculation unit, a control unit, and a comparison and judgment unit. By real-time monitoring of parameters such as the ambient temperature, water mist density, dust density, droplet flow rate, dust flow rate, and the mixed concentration of water mist and dust particles in the raw coal bunker, the dust reduction efficiency of the spray field and the overall dust capture efficiency are calculated, and it is determined whether an alarm needs to be issued or the high-pressure water supply pump 702 needs to be shut down based on the calculation results.

[0109] Beneficial effects:

[0110] Intelligent management: The addition of the intelligent dust suppression detection and alarm module realizes the intelligent management of the device and improves work efficiency and safety.

[0111] Accurate evaluation: Through real-time monitoring and calculation of multiple detection units and sensors, accurate evaluation of the dust reduction efficiency and overall dust capture efficiency of the spray field is achieved.

[0112] Timely alarm: When the dust capture efficiency is lower than the preset threshold, the alarm will sound in time and shut down the water supply pump, avoiding waste of resources and damage to equipment. At the same time, it also facilitates maintenance work.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raw coal bunker spray dust suppression device, characterized in that: include: A bottom plate (1), a support frame (2), a raw coal bunker body (3), a spray lifting mechanism (4), a rotary spray mechanism (5), a driving and hedging mechanism (6), a water supply mechanism (7) and a control box (8); the support frame (2) is fixedly installed at the top center of the bottom plate (1); the raw coal bunker body (3) is fixedly provided on the support frame (2); the top of the raw coal bunker body (3) is fixedly provided with a spray lifting mechanism (4); the rotary spray mechanism (5) is fixedly provided on the spray lifting mechanism (4); the input end of the rotary spray mechanism (5) is fixedly connected to the driving and hedging mechanism (6); the top of the rotary spray mechanism (5) is fixedly connected to the water supply mechanism (7); the spray lifting mechanism (4), the rotary spray mechanism (5), the water supply mechanism (7) and the control box (8) are electrically connected respectively.

2. A raw coal bunker spray dust suppression device according to claim 1, characterized in that: The raw coal bin body (3) comprises: a raw coal bin body (301), a raw coal bin body (301) fixedly mounted vertically on the top of the support frame (2), a conical discharge pipe (302) fixedly mounted at the bottom of the raw coal bin body (301), a material level meter (303) fixedly mounted on the conical discharge pipe (302), an electric discharge valve (304) fixedly mounted on the conical discharge pipe (302), and a horizontal cover plate (305) fixedly mounted on the top of the raw coal bin body (301).

3. A raw coal bunker spray dust suppression device according to claim 2, characterized in that: The spray lifting mechanism (4) comprises: a gantry frame (401), the top of the sealing plate (305) is fixedly installed with the gantry frame (401) along the left and right directions, the top and bottom ends of the gantry frame (401) are fixedly installed with a pair of mounting plates (402) spaced apart from each other on the left and right sides, the two mounting plates (402) on the left and right sides are centrally rotatably connected to a rope winding roller (403), the right end of the axis of the rope winding roller (403) is fixedly connected to the output shaft end of a lifting motor (404), the lifting motor (404) is fixedly connected to the mounting plate (402) on the right side, the upper parts of the left and right inner walls of the gantry frame (401) are fixedly connected to a fixing plate (40 5), the left and right inner walls of the raw coal bin body (301) correspond to the fixed plate 2 (406) fixedly installed below the fixed plate 1 (405), and a vertical guide rod (407) is fixedly installed between the fixed plate 1 (405) and the fixed plate 2 (406) on each side, and the guide rods (407) on the left and right sides are respectively slidably connected to the sleeve 1 (408) up and down, and the middle of the left and right sleeves 1 (408) is fixedly connected to the cross beam 1 (409), and the top of the cross beam 1 (409) is fixedly installed with a bracket 1 (410), and the top of the bracket 1 (410) is fixedly connected to the rope winding roller (403) through a cable (411).

4. A raw coal bunker spray dust suppression device according to claim 3, characterized in that: The rotary spray mechanism (5) comprises: a rotary vertical pipe (501), a rotary vertical pipe (501) rotatably connected to the middle of the cross beam (409), the top of the rotary vertical pipe (501) is fixedly connected to a rotary joint (502), the top of the rotary joint (502) is rotatably connected to a water inlet pipe (503), the water inlet pipe (503) is fixedly connected to a bracket (410), the upper part of the rotary vertical pipe (501) is symmetrically fixedly connected to a pair of horizontal spray pipes (504), the bottom of each spray pipe (504) is fixedly connected to a plurality of atomizing nozzles (505), a solenoid valve (506) is fixedly installed at the connection between the spray pipe (504) and the rotary vertical pipe (501), and one end of the spray pipe (504) away from the rotary vertical pipe (501) is fixedly connected to a vertical pipe (507).

5. A raw coal bunker spray dust suppression device according to claim 4, characterized in that: The second vertical pipe (507) is fixedly connected to a plurality of second atomizing nozzles (508) along the vertical direction near the raw coal bin body (301), the middle of the rotating vertical pipe (501) is fixedly connected to the second spray pipe (509) along the left and right directions symmetrically, the bottom end of the rotating vertical pipe (501) is fixedly connected to the third spray pipe (512) along the left and right directions, and the second spray pipe (509) and the third spray pipe (512) are respectively fixedly connected to the second spray pipe (509) and the third spray pipe (512) at equal intervals along the left and right directions. A plurality of atomizing nozzles three (510) are connected, a solenoid valve two (511) is fixedly installed on the spray pipe two (509), a solenoid valve three (513) is fixedly installed at the connection between the spray pipe three (512) and the rotating vertical pipe (501), the spray pipe one (504), the spray pipe two (509) and the spray pipe three (512) decrease in length from top to bottom, and a distance sensor one (514) is fixedly installed at the front center of the spray pipe three (512).

6. A raw coal bunker spray dust suppression device according to claim 3, characterized in that: The driving and hedging mechanism (6) comprises: a driving motor (601); a vertical driving motor (601) is fixedly installed on the left bottom end of the rotating vertical tube (501) on the horizontal beam (409); the output shaft end of the driving motor (601) is fixedly connected to a vertical rotating shaft (602); the rotating shaft (602) rotates in the up and down directions and passes through the horizontal beam (409); the rotating shaft (602) is fixedly connected to a pulley (603) and a spur gear (604) in sequence from top to bottom; the top of the rotating vertical tube (501) is fixedly connected to a pulley (605) and a spur gear (606) in sequence from top to bottom; the spur gear (604) is meshedly connected to the spur gear (606); and two sets of air supply mechanisms (607) are fixedly provided on the horizontal beam (409) in a symmetrical manner.

7. A raw coal bunker spray dust suppression device according to claim 3, characterized in that: The air supply mechanism (607) on the left side comprises: a second rotating shaft (6071); the left section of the first beam (409) is rotatably connected to the vertical second rotating shaft (6071); the bottom end of the second rotating shaft (6071) is fixedly connected to a fan blade (6072); the top end of the second rotating shaft (6071) is fixedly connected to a third pulley (6073); the third pulley (6073) on the left side is connected to the first pulley (603) via a belt (6074); the third pulley (6073) on the right side is connected to the second pulley (605) via a belt (6075); an outer fixed sleeve of the fan blade (6072) is provided with an air collecting tube (6076); the top end of the air collecting tube (6076) is fixedly connected to the first beam (409).

8. A raw coal bunker spray dust suppression device according to claim 3, characterized in that: The water supply mechanism (7) comprises: a water tank (701), the water tank (701) is fixedly mounted on the left outer wall of the raw coal bin body (301), a high-pressure water supply pump (702) is fixedly mounted on the left end of the cover plate (305), the left water inlet end of the high-pressure water supply pump (702) is fixedly connected to the water tank (701) via a water supply pipe (703), the right end of the high-pressure water supply pump (702) is fixedly connected to the water inlet pipe (503) via a water supply hose (704), the left end axis of the rope winding roller (403) is fixedly connected to the pipe winding roller (705), and the water supply hose (704) is wound around the pipe winding roller (705).

9. A raw coal bunker spray dust suppression device according to claim 8, characterized in that: There is also an intelligent dust suppression detection and alarm module, which includes: A temperature detection unit 1, used for detecting the ambient temperature value inside a raw coal bunker body (301) when a raw coal bunker spray dust suppression device is in operation; Density detection unit 1, used to detect the density value of the water mist sprayed by the rotary atomizing nozzle; Density detection unit 2, used for sampling and detecting the density value of dust particles in the raw coal bin (301); Density detection unit three, used for detecting the density value of water in the rotating vertical pipe (501); Flow rate detection unit 1, used to detect the flow rate value of the droplets sprayed downward during operation; Flow rate detection unit 2 is used to detect the upward flow rate of dust particles; A concentration detection unit, used to detect the mixed concentration value of water mist and dust particles in the raw coal bin (301); Alarm, used to give an alarm in case of abnormal situation; A first calculation unit calculates the dust reduction efficiency of the spray field of the jth atomizing nozzle in the raw coal bin (301) based on data from the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2 and the concentration detection unit; A second calculation unit calculates a sum evaluation value of the superposition of the capture efficiency of the entire dust in all spray fields of the rotary spray mechanism (5) based on the calculation result of the first calculation unit; A control unit, used to collect and process the data of each detection unit and sensor, the control unit is electrically connected to the temperature detection unit 1, the density detection unit 1, the density detection unit 2, the flow rate detection unit 1, the flow rate detection unit 2, the concentration detection unit and the alarm respectively; The comparison and judgment unit is used to compare and judge whether the sum of the evaluation values ​​of the superposition of the overall dust capture efficiency in all the spray fields of the rotary spray mechanism (5) is within a preset threshold range.

10. A raw coal bunker spray dust suppression device according to claim 9, characterized in that: include: The first calculation unit calculates based on the following formula 1: (1); where: η j is the dust reduction efficiency of the spray field of the jth atomizing nozzle in the raw coal bin (301), S t is the inertial collision coefficient of large dust particles and water mist, S t >0.3, K r is the relative size ratio of small dust particles to droplets, K r <0.1, v0 is the average downward velocity of the droplets detected by velocity detection unit 1, v1 is the average upward velocity of the dust detected by velocity detection unit 2, (v0-v1) is the average velocity of the relative motion between the dust particles and the droplets, d s is the diameter of the droplets sprayed by the atomizing nozzle, ρ is the density of the water mist detected by the density detection unit 1, μ is the air dynamic viscosity coefficient, which is 0.5, D is the inner diameter of the raw coal bin (301), C S is the mixed concentration value of water mist and dust particles in the raw coal bin (301) detected by the concentration detection unit, d y is the diameter of the dust particles, ρ2 is the dust density value detected by the density detection unit 2; The second calculation unit calculates based on the following formula 2: Where: λ is the sum of the total dust capture efficiency of all spray fields in the rotary spray mechanism (5), Q Y is the preset water mist flow value of the atomizing nozzle, ∏ is the multiplication symbol, j is the jth atomizing nozzle, n is the number of atomizing nozzles, C q is the flow coefficient of water in the rotating vertical pipe (501), C q <0.3, d is the nozzle diameter, P is the water supply pressure value of the high-pressure water supply pump (702), ρ3 is the density value of the water in the rotating vertical pipe (501) detected by the density detection unit 3, T1 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 at the beginning of spraying, T2 is the ambient temperature value in the raw coal bunker detected by the temperature detection unit 1 at the end of spraying, T max is the maximum ambient temperature in the raw coal bunker detected by the temperature detection unit 1, T min is the minimum ambient temperature in the raw coal bunker detected by the temperature detection unit 1; ln is a logarithmic function, and e is a natural constant with a value of 2.72; The comparison and judgment unit performs comparison and judgment. When λ is greater than or equal to the preset threshold range, the dust suppression effect is met and the alarm does not respond to the alarm. When λ is less than the preset threshold range, the control unit controls the alarm to sound an alarm and at the same time controls the high-pressure water supply pump (702) to be turned off for easy maintenance.

Images