Dust removal device in ash discharging process of ash silo

Abstract

The invention relates to a dust removal device in an ash discharging process of an ash silo. The dust removal device comprises a main motor, a rotating rod, a lifting rod and fan blades, the output end of the main motor is connected with a rotating rod, and the rotating rod is fixedly connected with a lifting rod; a mounting frame is fixed to the lower end of the lifting rod, a mounting ring is arranged below the mounting frame, and the fan blades are evenly fixed to the outer edge of the mounting ring in the circumferential direction; and a baffle is arranged on the outer edge of the mounting frame, so that the problem of dust raising caused by disordered discharge of dust in the dust discharge process can be solved.

Description

Technical Field

[0001] The invention relates to a dust removal device in an ash bin during ash discharge, belonging to the technical field of dust removal. Background Art

[0002] In the current ash storage system, during the ash discharge process, due to the gap between the ash discharge port and the ash car, a large amount of dust will gush out during the ash discharge, which is easy to pollute the environment and cause harm to the operators. Secondly, most of the existing ash storage dust removal devices use water spray for sedimentation, but water mist sedimentation can only remove part of the dust, and the remaining dust cannot be settled, resulting in dust leakage in the air; and if the ash temperature is high, it may cause the spray water to produce a vaporization reaction, causing visual pollution. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a dust removal device for use in an ash bin during ash discharge, which can avoid the problem of dust generation caused by disorderly dust discharge during the ash discharge.

[0004] The technical solution of the present invention is as follows:

[0005] A dust removal device for use in an ash bin during ash discharge, comprising a main motor, a rotating rod, a lifting rod and fan blades; the output end of the main motor is connected to the rotating rod, and the rotating rod is fixedly connected to the lifting rod; a mounting frame is fixed to the lower end of the lifting rod, a mounting ring is provided below the mounting frame, and the fan blades are evenly fixed to the outer edge of the mounting ring in a circumferential direction; a baffle is provided on the outer edge of the mounting frame.

[0006] Wherein, a dynamic spoiler component is coaxially provided at the bottom of the mounting frame, and the dynamic spoiler component includes an annular support plate fixed to the bottom surface of the mounting frame, the mounting ring is sleeved on the outside of the annular support plate, the annular support plate has a plurality of arc-shaped spoilers evenly distributed in the circumferential direction, and the arc-shaped spoiler is located between the gap between the mounting ring and the annular support plate; the inner arc surface of the arc-shaped spoiler is opposite to the rotation direction of the mounting ring; the inner arc side of each arc-shaped spoiler is provided with a guide groove extending downwardly inclined, and the inlet end of the guide groove is located at the top of the side of the inner arc surface of the arc-shaped spoiler close to the annular support plate, and the outlet end of the guide groove is located at the bottom of the side of the inner arc surface of the arc-shaped spoiler away from the annular support plate, and a slot hole is provided through the mounting ring, one end of the slot hole is butted with the outlet end of the guide groove, and the other end of the slot hole extends to the outer edge of the mounting ring.

[0007] Among them, the connecting rod is a hollow structure, a pressurization chamber is provided inside the mounting frame, the connecting rod and the pressurization chamber are connected, an independent air pump is connected to the outside of the connecting rod, and the independent air pump is used to input high-pressure gas into the pressurization chamber. A plurality of downward-spraying boosting nozzles are distributed circumferentially at the bottom of the pressurization chamber, and the spraying direction of the boosting nozzle is consistent with the inclination direction of the guide groove.

[0008] It also includes a dynamic pressurization system, which includes an inner transmission shaft arranged inside the connecting rod, a planetary gearbox is arranged at the bottom of the mounting ring, the inner transmission shaft passes through the pressurization chamber and the annular support plate and is connected to the planetary gearbox, and the output shaft of the planetary gearbox is connected to a wave generator.

[0009] Among them, the wave generator includes a rigid base and a guide ring coaxially located at the bottom of the mounting ring, the guide ring is sleeved on the outside of the rigid base and a resonance cavity is formed between the guide ring and the rigid base, the inner wall of the guide ring is circumferentially provided with a wavy guide groove, the outer edge of the rigid base is provided with three groups of evenly distributed hinge seats, each of the hinge seats is connected with an elastic pressure arm through a spring, the end of the elastic pressure arm is hingedly provided with a counterweight block, and the counterweight block is slidably connected to the wavy guide groove; an airflow modulation channel is opened through the inside of the mounting frame and the mounting ring, the airflow modulation channel is used to connect the pressurization cavity and the resonance cavity, and the airflow modulation channel cooperates with the wave generator to generate airflow resonance.

[0010] Wherein, a spiral guide vane is arranged inside the airflow modulation channel, and a spiral jet is formed when the airflow passes through the spiral guide vane and enters the resonance cavity, and the rotation direction of the spiral jet is opposite to the rotation direction of the wave generator.

[0011] Among them, the wavy guide groove includes guide grooves at the crests and guide grooves at the troughs that are staggered and connected, the guide groove depth of the guide grooves at the troughs is greater than the guide groove depth of the guide grooves at the crests, and the top of the counterweight block is connected to two guide fins through a torsion spring, and the guide fins and the wavy guide grooves smoothly transition toward one side.

[0012] Wherein, the output shaft of the planetary gearbox is connected to the rigid base plate, and the guide ring is fixedly connected to the bottom of the mounting ring.

[0013] The present invention has the following beneficial effects:

[0014] The present invention drives the rotating rod and the lifting rod to rotate the fan blades to generate dust suppression airflow through the main motor, and combines the reverse flow guide structure of the arc spoiler in the dynamic spoiler component, the inclined injection channel of the guide groove and the directional discharge of the mounting ring groove hole to achieve the coordinated dust removal of the rotating airflow and gravity sedimentation.

[0015] The centrifugal vibration of the elastic pressure arm in the wave generator drives the counterweight block to rise and fall periodically along the wave-shaped guide groove, and the alternating expansion and contraction of the guide vanes at the wave crests and troughs form a pulsed change in the cross-sectional area of the flow channel, achieving the dual effects of airflow resonance to enhance dust adsorption and dynamic impact;

[0016] In the present invention, three sets of counterweights with a phase difference distribution are arranged on and driven to move out of position in the wavy guide groove of the planetary gearbox, so that the adsorption area, impact area and transition area of the flow guiding vane form a continuous alternating effect, realizing the seamless connection of the dust removal force and balancing the system vibration through the superposition of centrifugal force vectors. Finally, the technical effects of efficiently suppressing ash discharge and dust raising, precisely controlling the particle sedimentation trajectory and operating stably and reliably are achieved. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a half-sectional view of the partial structure of the present invention;

[0019] Figure 3 It is a top view of the mounting ring and the dynamic spoiler assembly of the present invention;

[0020] Figure 4 It is a top view of the guide groove at the wave trough where the elastic pressing arm of the present invention is located;

[0021] Figure 5 It is a top view of the guide groove at the wave peak where the elastic pressing arm of the present invention is located.

[0022] The reference numerals in the figure are shown as:

[0023] 1, main motor; 2, rotating rod; 3, lifting rod; 4, fan blade; 5, mounting bracket; 6, mounting ring; 7, baffle; 81, annular support plate; 82, arc-shaped spoiler; 83, flow guiding groove; 84, pressurizing chamber; 85, pressurizing nozzle; 201, inner layer transmission shaft; 202, spiral flow guiding vane; 203, planetary gearbox; 216, rigid base plate; 218, elastic pressing arm; 220, counterweight; 221, guiding ring; 222, wavy guide groove; 2221, guide groove at the wave peak; 2222, guide groove at the wave trough; 232, flow guiding vane; 234, air flow modulation channel; 242, resonance chamber; 21, connecting rod. Detailed Embodiments

[0024] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0025] Please refer to Figures 1 to 5 , the invention provides a technical solution:

[0026] The dust removal device during the ash discharge process of the ash silo in this embodiment includes a main motor 1, a rotating rod 2, a lifting rod 3, and fan blades 4; the output end of the main motor 1 is connected to the rotating rod 2, and the rotating rod 2 is fixedly connected to the lifting rod 3; a mounting frame 5 is fixedly installed at the lower end of the lifting rod 3, an installation ring 6 is arranged below the mounting frame 5, and the fan blades 4 are circumferentially and evenly fixed on the outer edge of the installation ring 6; a baffle 7 is provided on the outer edge of the mounting frame 5; the rotation of the main motor 1 can drive the rotating rod 2 to rotate and then drive the fan blades 4 at the bottom to rotate synchronously. At the same time, the baffle 7 is used to block the dust from rising caused by the rotation of the fan blades 4.

[0027] A dynamic flow disturbance component is coaxially arranged at the bottom of the mounting frame 5. The dynamic flow disturbance component includes an annular support plate 81 fixed to the bottom surface of the mounting frame 5. The installation ring 6 is sleeved outside the annular support plate 81. A plurality of arc-shaped flow disturbance vanes 82 are evenly distributed circumferentially on the annular support plate 81, and the arc-shaped flow disturbance vanes 82 are located in the gap between the installation ring 6 and the annular support plate 81; the inner arc surface of the arc-shaped flow disturbance vane 82 is opposite to the rotation direction of the installation ring 6. Specifically, for example, if the fan blades 4 rotate clockwise, the arc-shaped convex surface of the arc-shaped flow disturbance vane 82 faces the counterclockwise direction (i.e., the windward surface is concave). This design makes the air flow generate intense turbulence due to the reverse bending structure when the rotating air flow generated by the fan blades 4 passes through the arc-shaped flow disturbance vanes 82, forming a reverse shear force, thereby forcibly intercepting the dust particles that originally spread with the air flow in the concave area of the arc-shaped flow disturbance vanes 82. At the same time, the reverse bending diversion effect changes the movement trajectory of the dust, making it easier to settle downward.

[0028] A diversion groove 83 is provided on the inner arc side of each arc-shaped flow disturbance vane 82 and extends downward obliquely. The inlet end of the diversion groove 83 is located at the top of the inner arc surface of the arc-shaped flow disturbance vane 82 close to the annular support plate 81, and the outlet end of the diversion groove 83 is located at the bottom of the inner arc surface of the arc-shaped flow disturbance vane 82 far from the annular support plate 81. A slot hole is provided through the installation ring 6. One end of the slot hole is docked with the outlet end of the diversion groove 83, and the other end of the slot hole extends to the outer edge of the installation ring 6; specifically, the inlet end of the diversion groove 83 is arranged at the edge position of the arc-shaped flow disturbance vane 82 farthest from the center of the installation ring 6, and the outlet end extends obliquely downward to the bottom of the installation ring 6; this layout enables the high-speed air flow to accelerate the downward movement of the air flow by using the potential energy generated by the height difference when entering the diversion groove 83 from the rotating outer edge of the fan blades 4, and at the same time guides the dust particles towards the ash discharge port through the inclined diversion groove 83.

[0029] The connecting rod 21 has a hollow structure. There is a pressurization chamber 84 inside the mounting frame 5. The connecting rod 21 communicates with the pressurization chamber 84. An independent air pump is connected to the outside of the connecting rod 21. The independent air pump is used to input high-pressure gas into the pressurization chamber 84. A plurality of downwardly jetting pressurization nozzles 85 are circumferentially distributed at the bottom of the pressurization chamber 84. The jetting direction of the pressurization nozzles 85 is the same as the inclination direction of the flow guiding groove 83; by jetting high-pressure gas downward through the pressurization nozzles 85, its jetting direction is exactly the same as the inclination direction of the flow guiding groove 83, so that the two airflows act synergistically. Specifically, the high-speed airflow of the pressurization nozzles 85 directly impacts the raised dust, while the inclined airflow of the flow guiding groove 83 guides the dust to sink along a specific path. The co-directional superposition of the two forms a powerful downward "airflow barrier", which not only suppresses the upward movement of dust, but also promotes the rapid settlement of particles, and at the same time avoids secondary dusting caused by chaotic airflow, thereby achieving efficient dust removal.

[0030] It further includes a dynamic pressurization system. The dynamic pressurization system includes an inner layer transmission shaft 201 arranged inside the connecting rod 21. A planetary gearbox 203 is arranged at the bottom of the mounting ring 6. The inner layer transmission shaft 201 passes through the pressurization chamber 84 and the annular support plate 81 and is connected to the planetary gearbox 203. The output shaft of the planetary gearbox 203 is connected with a vibration generator. The vibration generator includes a rigid base plate 216 and a guiding ring 221 coaxially located at the bottom of the mounting ring 6. The guiding ring 221 is sleeved outside the rigid base plate 216 and a resonance chamber 242 is formed between the guiding ring 221 and the rigid base plate 216. A wavy guiding groove 222 is circumferentially arranged on the inner wall of the guiding ring 221. Three groups of evenly distributed hinge seats are arranged on the outer edge of the rigid base plate 216. Elastic pressurization arms 218 are connected to the hinge seats through springs. A counterweight 220 is hingedly arranged at the end of the elastic pressurization arm 218. The counterweight 220 is slidably connected with the wavy guiding groove 222; an air flow modulation channel 234 is formed through the mounting frame 5 and the mounting ring 6. The air flow modulation channel 234 is used to communicate the pressurization chamber 84 and the resonance chamber 242. The air flow modulation channel 234 cooperates with the vibration generator to generate air flow resonance;

[0031] It is worth mentioning that a spiral guiding vane 202 is arranged inside the air flow modulation channel 234. When the air flow enters the resonance chamber 242 through the spiral guiding vane 202, a spiral jet flow is formed, and the rotation direction of the spiral jet flow is opposite to the rotation direction of the vibration generator.

[0032] The wavy guide groove 222 includes the guide groove 2221 at the wave crest and the guide groove 2222 at the wave trough that are staggeredly connected. The depth of the guide groove 2222 at the wave trough is greater than that of the guide groove 2221 at the wave crest. Two flow guiding fins 232 are connected to the top of the counterweight 220 through torsion springs. The side of the flow guiding fin 232 facing the wavy guide groove 222 has a smooth transition; further explanation, the distance between the wave crest of the wavy guide groove 222 and the hinge seat of the rigid base plate 216 is greater than the distance between the wave trough and the hinge seat of the rigid base plate 216; therefore, when the main motor 1 drives the rotating rod 2, which in turn causes the connecting rod 21 to rotate, the inner layer transmission shaft 201 can be driven to rotate. After the speed is increased by the planetary gearbox 203, the wave generator is pushed to rotate. The elastic pressing arm 218 expands outward under the action of centrifugal force, and the counterweight 220 at its end slides periodically along the wavy guide groove 222 of the guide ring 221. And due to the action of the spring and the distance difference between the wave crest and the wave trough, the elastic pressing arm 218 is forced to generate high-frequency flapping vibration;

[0033] The high-frequency flapping vibration generated by the elastic pressing arm 218 resonates with the helical jet flow in the air flow modulation channel 234, which can make the dust, under the action, generate Stokes drift under the action of the alternating pressure, and then accumulate. At the same time, the reverse pressure gradient generated by the resonance reduces the rising air flow velocity and destroys the suspension condition of the dust;

[0034] As a preference, an atomization system can also be added, and the resonance can reduce the particle size of the water mist;

[0035] The counterweight 220 slides along the wavy guide groove 222 under the action of centrifugal force, driving the guide vane 232 to expand / contract periodically. Specifically, when the equipment is stationary, the guide vane 232 is close to the inner wall of the guide ring 221, and the counterweight 220 slides along the wavy guide groove 222. When it is in the guide groove 2221 position at the wave crest, the guide vane 232 expands outward, and when it is in the guide groove 2222 position at the wave trough, the guide vane 232 retracts inward. Within one rotation, the gap shows a periodic and gradual shrinking change; that is, when the guide vane 232 is located in the guide groove 2222 at the wave trough, due to the deeper guide groove depth of the guide groove 2222 at the wave trough, under the action of centrifugal force, the counterweight 220 sinks into the guide groove 2222 at the wave trough. At this time, the guide vane 232 is partially immersed in the guide groove 2222 at the wave trough along with the counterweight 220. Since the guide vane 232 and the wavy guide groove 2222 are The guide groove 222 smoothly transitions to one side, so the two guide vanes 232 will be subjected to the pressure of the walls on both sides of the wavy guide groove 222 and then retracted. When the guide vane 232 is located at the guide groove 2221 at the crest, since the guide groove depth of the guide groove 2221 at the crest is shallow, the space for the counterweight 220 to penetrate is limited, and therefore it will partially detach from the guide groove 2221 at the crest. At this time, one end of the guide vane 232 will not be restricted and will be expanded outwardly under the action of the torsion spring. When the guide vane 232 is expanded, the resonance cavity 242, that is, the cross-sectional area of the flow channel of the airflow increases, thereby causing the airflow velocity to decrease, achieving an increase in static pressure, and adsorbing fine dust to the surface of the guide vane 232. Conversely, when the guide vane 232 is retracted, the cross-sectional area of the flow channel decreases, and the airflow velocity surges, pushing the adsorbed fine dust particles to settle through the dynamic pressure impact.

[0036] As a preferred embodiment, the three counterweights 220 are located at different positions, one of which is located at the crest, another at the center, and the last at the trough; the purpose of such arrangement is to ensure the continuous alternation of the actions of the guide vanes 232 through phase difference control, that is, when a certain counterweight 220 slides to the crest to unfold the guide vanes 232 to form an adsorption zone, another counterweight 220 is sliding to the trough to close the guide vanes 232 to generate impact airflow, and the third counterweight 220 is in the transition section to maintain the stability of the flow channel. This staggered layout eliminates the dead zone of the action, realizes the seamless connection of the pulse dust removal force, and balances the rotational centrifugal force to avoid resonance instability.

[0037] The output shaft of the planetary gearbox 203 is connected to the rigid base plate 216 , and the guide ring 221 is fixedly connected to the bottom of the mounting ring 6 .

[0038] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dust removal device during the ash discharging process of an ash silo, characterized in that: It includes a main motor (1), a rotating rod (2), a lifting rod (3) and a fan blade (4); the output end of the main motor (1) is connected to the rotating rod (2), and the rotating rod (2) is fixedly connected to the lifting rod (3); a mounting frame (5) is fixedly installed at the lower end of the lifting rod (3), an installation ring (6) is arranged below the mounting frame (5), and the fan blades (4) are circumferentially and evenly fixed on the outer edge of the installation ring (6); a baffle (7) is arranged on the outer edge of the mounting frame (5).

2. The dust removal device during the ash discharge process of the ash bunker according to claim 1, characterized in that: The lower end of the lifting rod (3) is connected to the mounting frame (5) through a connecting rod (21), and a dynamic flow disturbance assembly is coaxially arranged at the bottom of the mounting frame (5). The dynamic flow disturbance assembly includes an annular support plate (81) fixed to the bottom surface of the mounting frame (5), the installation ring (6) is sleeved outside the annular support plate (81), and a plurality of arc-shaped flow disturbance vanes (82) are circumferentially and evenly distributed on the annular support plate (81), and the arc-shaped flow disturbance vanes (82) are located in the gap between the installation ring (6) and the annular support plate (81); the inner arc surface of the arc-shaped flow disturbance vane (82) is opposite to the rotation direction of the installation ring (6); a flow guiding groove (83) extending downward and obliquely is arranged on the inner arc side of each arc-shaped flow disturbance vane (82), and the inlet end of the flow guiding groove (83) is located at the top of the inner arc surface of the arc-shaped flow disturbance vane (82) close to the annular support plate (81), and the outlet end of the flow guiding groove (83) is located at the bottom of the inner arc surface of the arc-shaped flow disturbance vane (82) far from the annular support plate (81). A slot hole is penetrated through the installation ring (6), one end of the slot hole is butted against the outlet end of the flow guiding groove (83), and the other end of the slot hole extends to the outer edge of the installation ring (6).

3. The dust removal device during the ash discharging process of the ash bunker according to claim 2, wherein: The connecting rod (21) is of a hollow structure, a pressurizing cavity (84) is arranged inside the mounting frame (5), the connecting rod (21) is communicated with the pressurizing cavity (84), an independent air pump is connected to the outside of the connecting rod (21), the independent air pump is used for inputting high-pressure gas into the pressurizing cavity (84), and a plurality of downward jetting pressurizing nozzles (85) are distributed along the circumference at the bottom of the pressurizing cavity (84), and the jetting direction of the pressurizing nozzles (85) is consistent with the inclination direction of the flow guiding groove (83).

4. The dust removal device during the ash discharging process of the ash bunker according to claim 3, characterized in that: It further includes a dynamic pressurizing system. The dynamic pressurizing system includes an inner layer transmission shaft (201) arranged inside the connecting rod (21), a planetary gearbox (203) is arranged at the bottom of the installation ring (6), the inner layer transmission shaft (201) passes through the pressurizing cavity (84) and the annular support plate (81) and is connected to the planetary gearbox (203), and an output shaft of the planetary gearbox (203) is connected with a wave generator.

5. The dust removal device during the ash discharging process of the ash silo according to claim 4, characterized in that: The wave generator comprises a rigid base plate (216) and a guide ring (221) coaxially located at the bottom of the mounting ring (6); the guide ring (221) is sleeved on the outside of the rigid base plate (216) and a resonance cavity (242) is formed between the guide ring (221) and the rigid base plate (216); a wave-shaped guide groove (222) is circumferentially arranged on the inner wall of the guide ring (221); three groups of evenly distributed hinge seats are arranged on the outer edge of the rigid base plate (216); and the hinge seats are all elastically connected. The spring is connected to an elastic pressure arm (218), and a counterweight block (220) is hingedly provided at the end of the elastic pressure arm (218), and the counterweight block (220) is slidably connected to the wave-shaped guide groove (222); an airflow modulation channel (234) is opened through the inside of the mounting frame (5) and the mounting ring (6), and the airflow modulation channel (234) is used to connect the pressure chamber (84) and the resonance chamber (242), and the airflow modulation channel (234) cooperates with the wave generator to generate airflow resonance.

6. The dust removal device during the ash discharging process of the ash silo according to claim 5, characterized in that: A spiral guide vane (202) is arranged inside the airflow modulation channel (234), and a spiral jet is formed when the airflow passes through the spiral guide vane (202) and enters the resonance cavity (242), and the rotation direction of the spiral jet is opposite to the rotation direction of the wave generator.

7. The dust removal device during the ash discharging process of the ash silo according to claim 5, wherein: The wave-shaped guide groove (222) comprises a guide groove (2221) at a wave crest and a guide groove (2222) at a wave trough which are staggered and connected, the guide groove depth of the guide groove (2222) at the wave trough is greater than the guide groove depth of the guide groove (2221) at the wave crest, and the top of the counterweight (220) is connected to two guide fins (232) via a torsion spring, and the guide fins (232) and the wave-shaped guide groove (222) smoothly transition toward one side.

8. The dust removal device during the ash discharging process of the ash bunker according to claim 5, wherein: The output shaft of the planetary gear box (203) is connected to the rigid base plate (216), and the guide ring (221) is fixedly connected to the bottom of the mounting ring (6).

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