Municipal road construction dust treatment device

Abstract

The application discloses a municipal road construction flying dust treatment device, which comprises a chassis, wherein the chassis is provided with a dust capturing tower; the dust capturing tower comprises a cyclone generating section, an electric charging section and an electrostatic dust collecting section which are sequentially communicated; the cyclone generating section comprises a coaxial double-layer sleeve which is composed of an inner cylinder in the shape of an inverted cone and an outer cylinder in the shape of a cylinder; the bottom of the inner cylinder is connected with an air inlet pipe for tangential air inlet; an annular cyclone material dropping channel with a narrow upper part and a wide lower part is formed between the outer cylinder and the inner cylinder; an annular flow guide plate is arranged between the top of the outer cylinder and the electric charging section; a first dust recovery cabin is arranged at the bottom of the outer cylinder; a needle plate type corona electrode is arranged in the inner cavity of the electric charging section; a dust collecting plate is arranged in the inner cavity of the electrostatic dust collecting section; an air outlet is arranged on the side wall of the electrostatic dust collecting section; and a dust sensor is arranged at the end of the chassis close to the air blower. The application can capture, grade filter and locally treat unorganized flying dust during road construction, does not need to consume water resources and is convenient to move and arrange.

Description

Technical Field

[0001] This invention relates to the field of dust control equipment technology, and in particular to a dust control device for municipal road construction. Background Technology

[0002] Currently, the existing methods for controlling dust pollution from municipal road construction mainly employ three types of methods: fixed fog cannons, perimeter spraying, or vehicle-mounted fog cannons. Among them, fixed fog cannons are bulky, require external water and electricity, and have poor mobility; perimeter spraying is greatly affected by wind and is only effective for local areas; vehicle-mounted fog cannons are mobile, but the spray range is limited by the vehicle body, and they consume a lot of water and are prone to freezing in winter. The common defects of the above equipment are: (1) lack of targeting for discontinuous, dispersed, and low-altitude dust sources; (2) inability to simultaneously achieve closed-loop control of "on-site capture + graded filtration + dust recovery".

[0003] Therefore, there is an urgent need for a dust control device with a novel structure, high mobility, low water consumption, and continuous operation. Summary of the Invention

[0004] The purpose of this invention is to provide a municipal road construction dust control device that can capture, filter and dispose of fugitive dust during road construction without consuming water resources, and is easy to move and deploy flexibly, thus effectively solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dust control device for municipal road construction includes a chassis equipped with wheels and a control device. An inverted U-shaped dust collection tower is mounted above the chassis. The dust collection tower includes a cyclone generation section, a charging section, and an electrostatic dust collection section connected in sequence. The cyclone generation section includes a coaxial double-layer sleeve composed of an inverted cone-shaped inner cylinder and a cylindrical outer cylinder. An air inlet pipe for mounting a blower is connected to the bottom of the inner cylinder, and the air inlet pipe is tangent to the wall of the inner cylinder. An annular cyclone material discharge channel, narrower at the top and wider at the bottom, is formed between the outer cylinder and the inner cylinder. The top of the outer cylinder is connected to the charging section. An annular guide plate is provided above the annular cyclone discharge channel. The annular guide plate extends obliquely into the inner cavity of the inner cylinder and forms an annular vent with the top of the inner cylinder. The bottom of the outer cylinder is provided with a first dust collection chamber that communicates with the annular cyclone discharge channel. The inner cavity of the charged section is provided with a needle plate corona electrode. The inner cavity of the electrostatic dust collection section is provided with a dust collection plate. The side wall of the electrostatic dust collection section is provided with an air outlet. The chassis is provided with a dust sensor at the end near the induced draft fan. The induced draft fan, the needle plate corona electrode, the dust collection plate, and the dust sensor are respectively connected to the control device.

[0007] Further, the inner wall of the inner cylinder is provided with spirally distributed spiral guide plates.

[0008] Further, the inner wall of the outer cylinder is uniformly provided with a plurality of guide vane assemblies along the circumferential direction, the first dust recovery cabin is provided with a first dust recovery box located in the middle and a second dust recovery box surrounding the outer periphery of the first dust recovery box, an annularly distributed shunt ring with a herringbone cross section is arranged between the annular cyclone blanking channel and the first dust recovery cabin, and the shunt ring comprises a first shunt plate inclined inward towards the first dust recovery box and a second shunt plate inclined outward towards the second dust recovery box.

[0009] Further, the guide vane assembly comprises a carbon fiber blade, a rotating shaft and an angle indicating rod, the root of the carbon fiber blade is provided with a fixing block, the fixing block is fixedly connected with one end of the rotating shaft, the other end of the rotating shaft penetrates through the cylinder wall of the outer cylinder and is connected with the angle indicating rod, the rotating shaft is rotatably connected with the outer cylinder through a damping shaft sleeve, the angle indicating rod and the carbon fiber blade are arranged in a coplanar distribution, and the outer wall of the outer cylinder is provided with an angle indicating disc.

[0010] Further, the lower part of the annular cyclone blanking channel is provided with a stepped rectification grille located above the shunt ring, the inner side of the stepped rectification grille is connected with the outer wall of the inner cylinder, and the outer side of the stepped rectification grille is connected with the inner wall of the outer cylinder.

[0011] Further, the stepped rectification grille is composed of three grille plates distributed in parallel at intervals, and the pore diameter and opening rate of the three grille plates are both set to decrease sequentially from top to bottom.

[0012] Further, a coaxially distributed air return pipe penetrates through the interior of the inner cylinder, the bottom end of the air return pipe is communicated with the first dust recovery cabin, and the top end of the air return pipe is communicated with the inner cavity of the charging section.

[0013] Further, the charging section is in a bent pipe shape, the top of the charging section is provided with a mounting frame with a slot, the needle-plate type corona electrode comprises an insulating support, a tungsten needle array and an anode plate, the tungsten needle array is composed of a plurality of tungsten alloy needles fixed on a brass needle frame, the anode plate is a 304 stainless steel plate, the brass needle frame and the anode plate are fixed on the insulating support, and the insulating support is in plug connection with the slot.

[0014] Further, the dust collecting plate comprises a fixing base and a honeycomb dust collecting plate mounted on the fixing base, the honeycomb dust collecting plate is connected with a high-voltage power supply through a quick-plug terminal, the lower part of the dust collecting plate is provided with a rapper for knocking the honeycomb dust collecting plate, the bottom of the electrostatic dust collecting section is provided with a second dust recovery cabin, the second dust recovery cabin is provided with a third dust recovery box, and the rapper and the high-voltage power supply are respectively connected with the control device.

[0015] Furthermore, the chassis is equipped with a solar energy storage power supply system, which includes a foldable solar panel, an MPPT controller, and a lithium battery. The foldable solar panel and the lithium battery are respectively connected to the MPPT controller, and the MPPT controller is connected to the control device.

[0016] Compared with the prior art, the present invention provides a dust control device for municipal road construction, which has the following beneficial effects:

[0017] This invention forms a swirling-electric field coupled structure within the dust collection tower. By integrating mechanical centrifugal separation, gravity settling, and electrostatic deposition into a single tower, the collection efficiency is ≥99.5%, PM10 removal rate is 99.7%, PM2.5 removal rate is 99.3%, noise is <65dB(A), and water consumption is zero. Simultaneously, this invention performs three-stage dust separation, enabling automatic sorting of dust according to particle size: coarse powder (≥150μm) is used for roadbed backfilling, fine powder (10~150μm) is used for brick making, and ultrafine powder (≤10μm) is used for rubber filler, thus achieving resource utilization.

[0018] This invention employs a closed-loop control system based on dust sensors to adjust operating parameters in real time according to dust concentration, thereby achieving precise dust control and energy conservation.

[0019] This invention can capture, filter and dispose of fugitive dust during road construction without consuming water resources and is easy to move and deploy flexibly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of a half-section structure of the present invention;

[0023] Figure 3 for Figure 2 Cross-sectional view along the AA direction;

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0025] Figure 5 Exploded view of the guide vane assembly components;

[0026] Figure 6 This is a block diagram illustrating the control principle of the present invention.

[0027] Reference numerals: 1. Chassis; 11. Caster wheel; 2. Control device; 21. Dust sensor; 22. High-voltage power supply; 3. Swirl generation section; 31. Inner cylinder; 311. Spiral guide plate; 32. Outer cylinder; 321. Angle indicator; 33. Air inlet pipe; 34. Exhaust fan; 35. Annular cyclone discharge channel; 351. Stepped rectifier grid; 36. Annular guide plate; 37. Guide vane assembly; 371. Carbon fiber blade; 372. Rotating shaft; 373. Angle indicator rod; 374. Fixing block; 375. Damping bushing; 38. Diverter ring; 381. First diverter plate; 382. Second diverter plate; 39. Return air duct; 4. Charging section; 41. Needle plate corona electrode; 42. Mounting frame; 5. Electrostatic dust collection section; 51. Dust collection plate; 52. Air outlet; 53. Vibrator; 6. First dust collection chamber; 61. First dust collection box; 62. Second dust collection box; 7. Second dust collection chamber; 71. Third dust collection box; 8. Solar energy storage and power supply system; 81. Foldable solar panel; 82. MPPT controller; 83. Lithium battery. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The present invention will now be described in further detail through detailed embodiments and in conjunction with the accompanying drawings.

[0034] Please refer to Figures 1-6This embodiment provides a municipal road construction dust control device, including a chassis 1 equipped with wheels 11 and a control device 2, and a dust collection tower arranged in an inverted U-shape installed above the chassis 1. The dust collection tower includes a swirl generation section 3, a charging section 4, and an electrostatic dust collection section 5 connected in sequence. The cyclone generating section 3 includes a coaxial double-layer sleeve consisting of an inner cylinder 31 in the shape of an inverted cone and an outer cylinder 32 in the shape of a cylinder. The bottom of the inner cylinder 31 is connected to an air inlet pipe 33 for mounting a blower 34. The air inlet pipe 33 is tangentially connected to the wall of the inner cylinder 31. The outer cylinder 32 and the inner cylinder 31 form an annular cyclone material discharge channel 35 that is narrow at the top and wide at the bottom. An annular guide plate 36 is provided between the top of the outer cylinder 32 and the charged section 4, located above the annular cyclone material discharge channel 35. The annular guide plate 36 extends obliquely toward the inner cavity of the inner cylinder 31 and forms an annular vent with the top of the inner cylinder 31. The bottom of the outer cylinder 32 is provided with a first dust collection chamber 6 that communicates with the annular cyclone material discharge channel 35. In this way, the blower 34 can be used to adsorb the dust generated during road construction and blow it into the inner cylinder 31 through the air inlet pipe 33, thereby forming a rapid cyclone upward and performing the first dust separation. On one hand, the swirling effect of the inner cylinder 31 centrifuges dust particles, which are then deflected and thrown back into the annular cyclone discharge channel 35 under the guidance of the annular guide plate 36, forming a downward swirling flow. Since the annular cyclone discharge channel 35 is narrower at the top and wider at the bottom, the sudden expansion of the cross-sectional area reduces the airflow velocity to 2 m / s, causing the dust particles to fall under the combined action of residual centrifugal force and gravity, resulting in a second separation of coarse dust particles (≥150 μm) and fine dust particles (10~150 μm). On the other hand, the remaining airflow, having already had larger dust particles separated by the swirling flow at the center of the inner cylinder 31, rises into the charging section 4. The charging section 4 has a needle-plate corona electrode 41 inside, and the electrostatic dust collection section 5 has a dust collection plate 51 inside. The side wall of the electrostatic dust collection section 5 has an air outlet 52. The needle-plate corona electrode 41 can charge residual fine dust particles in the airflow entering the charging section 4. The dust collection plate 51 can adsorb and capture the charged fine dust particles, performing a third dust separation. The purified air is discharged back into the atmosphere through the outlet 52. A dust sensor 21 for detecting dust concentration during road construction is provided at the end of the chassis 1 near the induced draft fan 34. The induced draft fan 34, the needle-plate corona electrode 41, the dust collection plate 51, and the dust sensor 21 are respectively connected to the control device 2. The control device 2 can adjust the swirling intensity and electric field voltage in real time according to the dust concentration. As an example, the dust sensor 21 can be a product of model M402365, TF-LP01, etc.The control device 2 adopts a Siemens industrial controller of model SIMATIC IPC427E, equipped with Intel Core i7-8665UE, 4×GBE, with an operating temperature range of -25°C to 60°C.

[0035] In some specific embodiments, with reference to Figure 2 and Figure 3 , the inner wall of the inner cylinder 31 is provided with spirally distributed spiral guide baffles 311, so that after the dust-laden airflow tangentially enters the inner cylinder 31, the swirling effect can be enhanced, and larger dust particles are centrifugally thrown into the annular cyclone blanking channel 35, which facilitates the sedimentation and separation of coarse dust particles and fine dust particles.

[0036] In some specific embodiments, with reference to Figures 1-5 , the inner wall of the outer cylinder 32 is uniformly provided with a plurality of guide vane assemblies 37 along the circumferential direction. The first dust recovery chamber 6 is provided with a first dust recovery box 61 located in the middle and a second dust recovery box 62 surrounding the outer periphery of the first dust recovery box 61. An annularly distributed shunt ring 38 with a herringbone cross section is arranged between the annular cyclone blanking channel 35 and the first dust recovery chamber 6. The shunt ring 38 includes a first shunt plate 381 inclined inward toward the first dust recovery box 61 and a second shunt plate 382 inclined outward toward the second dust recovery box 62. By arranging the guide vane assemblies 37, the inclination direction of the guide vane assemblies 37 is consistent with the spiral direction of the airflow, which can strengthen the downward swirling flow in the annular cyclone blanking channel 35, throw the coarse dust particles (≥150μm) to the inner wall of the outer cylinder 32, and make them enter the first dust recovery chamber 6 along the inner wall of the outer cylinder 32 downward and fall into the second dust recovery box 62, while the fine dust particles (10~150μm) enter the first dust recovery chamber 6 downward along the outer wall of the inner cylinder 31 and fall into the first dust recovery box 61. At the same time, the inclined arrangement of the first shunt plate 381 and the second shunt plate 382 also facilitates the automatic sliding of coarse dust particles and fine dust particles and avoids accumulation. More specifically, each of the first dust recovery box 61 and the second dust recovery box 62 is a box structure with an open top, which is inserted and installed in the first dust recovery chamber 6 in a drawer-type opening manner, so that the first dust recovery box 61 and the second dust recovery box 62 can be pulled out laterally together and emptied.

[0037] In some specific embodiments, as shown in Figure 4 and Figure 5As shown, the guide vane assembly 37 includes a carbon fiber blade 371, a rotating shaft 372, and an angle indicator rod 373. A fixing block 374 is provided at the root of the carbon fiber blade 371. The fixing block 374 is fixedly connected to one end of the rotating shaft 372. The other end of the rotating shaft 372 passes through the wall of the outer cylinder 32 and is connected to the angle indicator rod 373. The rotating shaft 372 is rotatably connected to the outer cylinder 32 through a damping bushing 375. The angle indicator rod 373 and the carbon fiber blade 371 are coplanarly distributed. An angle indicator disk 321 is provided on the outer wall of the outer cylinder 32. The angle indicator disk 321 has scale reference lines. Since the guide vane assembly 37 is rotatably mounted on the wall of the outer cylinder 32, rotating the angle indicator rod 373 can drive the carbon fiber blades 371 to rotate synchronously, thereby changing the tilt angle and fine-tuning the intensity of the swirling flow to adapt to different dust-generating environments. Simultaneously, during adjustment, the angle indicator disk 321 can be used as a reference to control the tilt angle adjustment of the carbon fiber blades 371, which is quite intuitive. For example, the tilt angle of the carbon fiber blades 371 can be steplessly adjusted between 15° and 45°.

[0038] As an improved implementation method, refer to Figure 2 and Figure 3 The lower part of the annular cyclone discharge channel 35 is provided with a stepped rectifier grid 351 located above the diversion ring 38. The inner side of the stepped rectifier grid 351 is connected to the outer wall of the inner cylinder 31, and the outer side of the stepped rectifier grid 351 is connected to the inner wall of the outer cylinder 32. The stepped rectifier grid 351 is arranged at the lower part of the annular cyclone discharge channel 35, which enables the airflow velocity of separating coarse and fine powder particles to decrease step by step, avoiding secondary dust generation and facilitating the corresponding sedimentation into the first dust collection box 61 and the second dust collection box 62.

[0039] Specifically, such as Figure 3 As shown, the stepped rectifier grille 351 consists of three parallel, spaced-apart grilles, with the aperture and opening ratio of the three grilles decreasing sequentially from top to bottom. For example, the spacing between two adjacent grilles is 200 mm. The upper grille has an aperture of 50 mm and an opening ratio of 60%; the middle grille has an aperture of 30 mm and an opening ratio of 50%; and the lower grille has an aperture of 10 mm and an opening ratio of 40%. This stepped arrangement of the grilles allows the airflow velocity to decrease gradually, from 2 m / s to 1 m / s, and then to 0.3 m / s.

[0040] In some specific implementations, refer to Figure 2 and Figure 3The inner cylinder 31 is permeated with coaxially distributed return air ducts 39. The bottom end of the return air duct 39 is connected to the first dust collection chamber 6, and the top end of the return air duct 39 is connected to the inner cavity of the charging section 4. In this way, the airflow that has separated coarse and fine dust particles is introduced into the charging section and charged, causing the unsettled ultrafine dust particles to become charged.

[0041] In some specific implementations, refer to Figures 1-3 The charged section 4 is tubular, and its top is equipped with a mounting frame 42 with a slot. The needle-plate corona electrode 41 includes an insulating support, a tungsten needle array, and an anode plate. The tungsten needle array consists of several tungsten alloy needles fixed on a brass needle holder. The anode plate is made of 304 stainless steel. The brass needle holder and the anode plate are fixed to the insulating support, which is plugged into the slot. Thus, the needle-plate corona electrode can be inserted into or removed from the charged section via the slot for easy maintenance. When the rising airflow passes over the needle-plate corona electrode, it charges the ultrafine dust particles, which then move along the charged section towards the electrostatic dust collection section 5. Specifically, as an example, the tungsten needle array includes 60 Φ1.5mm×30mm tungsten alloy needles arranged in a 10×6 rectangular array, with a continuously adjustable voltage of 0-30kV. The insulating support is integrally injection molded from polytetrafluoroethylene.

[0042] In some specific implementations, refer to Figure 2 The dust collection plate 51 includes a fixed base and a honeycomb dust collection plate mounted on the fixed base. The honeycomb dust collection plate is connected to a high-voltage power supply 22 via quick-connect terminals. A vibrator 53 for striking the honeycomb dust collection plate is located at the lower part of the dust collection plate 51. A second dust collection chamber 7 is located at the bottom of the electrostatic dust collection section 5. The second dust collection chamber 7 has a third dust collection box 71 for receiving ultrafine dust particles (≤10μm) that fall after being vibrated. The vibrator 53 and the high-voltage power supply 22 are respectively connected to the control device 2. Thus, charged ultrafine dust particles are captured by the honeycomb dust collection plate, and the purified air is finally discharged back into the atmosphere through the air outlet. As the dust suppression operation proceeds, the vibrator is activated periodically to strike the honeycomb dust collection plate, causing the captured ultrafine dust particles to shake and fall into the third dust collection box 71 below. Specifically, the striking frequency of the vibrator 53 is adjustable from 1Hz to 5Hz. The honeycomb dust collection plate is extruded from aluminum-magnesium alloy, with overall dimensions of 600mm×800mm×200mm. It is a single-hole regular hexagon with a side length of 6mm and a wall thickness of 0.8mm. The third dust collection box 71 has an upward-opening box structure and is inserted into the second dust collection chamber 7 in a drawer-type opening manner. This allows the third dust collection box 71, which is filled with ultrafine dust particles, to be pulled out and emptied, achieving overall pull-out maintenance.

[0043] In some specific implementations, refer to Figure 1 , Figure 2 and Figure 6 The chassis 1 is equipped with a solar energy storage power supply system 8. By using this system, 24-hour off-grid operation is guaranteed, and energy consumption is reduced by 70% compared to traditional fog cannons. Specifically, the solar energy storage power supply system 8 includes a foldable solar panel 81, an MPPT controller 82, and a lithium battery 83. The foldable solar panel 81 and the lithium battery 83 are respectively connected to the MPPT controller 82, which is connected to the control device 2. For example, the foldable solar panel 81 uses a LONGi Green Energy Hi-MO 5 monocrystalline 450W foldable photovoltaic module with an unfolded area of ​​6m²; the MPPT controller 82 uses a Victron SmartSolarMPPT 150 / 100-Tr solar controller with a maximum input voltage of 150V and a maximum output current of 100A; and the lithium battery 83 has a capacity of 20kWh.

[0044] Work process description: (Reference) Figures 1-6 When in use, it is placed in the area where road construction is being carried out. Under the suction of the blower 34, the dust generated during road construction is blown into the inner cylinder 31 through the air inlet pipe 33. Since the dust-laden airflow is blown into the inner cylinder 31 tangentially, it can form a rapid swirling upward flow to separate the dust for the first time. On the one hand, the dust particles are centrifuged by the swirling effect of the inner cylinder 31 and thrown back into the annular cyclone discharge channel 35 under the guidance of the annular guide plate 36, forming a downward swirling flow. Since the annular cyclone discharge channel 35 is narrow at the top and wide at the bottom, the airflow velocity drops to 2m / s due to the sudden expansion of the cross-sectional area. This causes the dust particles to fall under the combined action of centrifugal force and gravity of the downward swirling flow, resulting in a second separation of dust particles, separating coarse dust particles (≥150μm) and fine dust particles (10~150μm). The airflow that has settled and separated the coarse and fine dust particles will be introduced into the charging section 4 through the return air pipe 39. On the other hand, the remaining airflow that has been separated from the larger dust particles by the swirling flow at the center of the inner cylinder 31 rises and enters the charging section 4. The needle-plate corona electrode 41 can charge the residual ultrafine dust particles (≤10μm) in the airflow entering the charging section 4. The dust collection plate 51 can adsorb and capture the charged ultrafine dust particles (≤10μm) and perform a third separation of dust. The purified air is finally discharged back into the atmosphere through the air outlet 52.

[0045] After working for a period of time, the first dust collection box 61, the second dust collection box 62, and the third dust collection box 71, which are filled with dust, are taken out to obtain coarse powder (≥150μm), fine powder (10~150μm), and ultrafine powder (≤10μm), respectively, thus realizing resource reuse.

[0046] The above embodiments are merely illustrative of the concept and technical solution of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dust control device for municipal road construction, comprising a chassis equipped with wheels and a control device, characterized in that, A dust collection tower distributed in an inverted U shape is installed above the chassis. The dust collection tower comprises a cyclone generation section, a charging section and an electrostatic dust collection section which are communicated in sequence. The cyclone generation section comprises a coaxial double-layer sleeve composed of an inverted cone-shaped inner cylinder and a cylindrical outer cylinder. The bottom of the inner cylinder is connected with an air inlet pipe equipped with an induced draft fan, and the air inlet pipe is tangent to the cylinder wall of the inner cylinder. An annular cyclone blanking channel that is narrow at the top and wide at the bottom is defined between the outer cylinder and the inner cylinder. An annular guide plate located above the annular cyclone blanking channel is arranged between the top of the outer cylinder and the charging section. The annular guide plate extends obliquely toward the inner cavity of the inner cylinder and forms an annular ventilation opening with the top of the inner cylinder. The bottom of the outer cylinder is provided with a first dust recovery cabin communicated with the annular cyclone blanking channel. A pin-plate type corona electrode is arranged in the inner cavity of the charging section, a dust collection plate is arranged in the inner cavity of the electrostatic dust collection section, and an air outlet is arranged on the side wall of the electrostatic dust collection section. A dust sensor is arranged at one end of the chassis close to the induced draft fan, and the induced draft fan, the pin-plate type corona electrode, the dust collection plate and the dust sensor are respectively connected with the control device; The inner wall of the inner cylinder is provided with a spirally distributed spiral guide plate; A plurality of guide vane assemblies are uniformly arranged on the inner wall of the outer cylinder along the circumferential direction. The first dust recovery cabin is provided with a first dust recovery box located in the middle and a second dust recovery box surrounding the outer periphery of the first dust recovery box. An annularly distributed shunt ring with a herringbone cross section is arranged between the annular cyclone blanking channel and the first dust recovery cabin. The shunt ring comprises a first shunt plate inclined inward toward the first dust recovery box and a second shunt plate inclined outward toward the second dust recovery box. The guide vane assembly comprises a carbon fiber blade, a rotating shaft and an angle indicating rod. A fixing block is arranged at the root of the carbon fiber blade, the fixing block is fixedly connected with one end of the rotating shaft, the other end of the rotating shaft penetrates through the cylinder wall of the outer cylinder and is connected with the angle indicating rod, the rotating shaft is rotatably connected with the outer cylinder through a damping shaft sleeve, the angle indicating rod and the carbon fiber blade are arranged in a coplanar distribution, and an angle indicating disc is arranged on the outer wall of the outer cylinder; A stepped rectification grille located above the shunt ring is arranged at the lower part of the annular cyclone blanking channel, the inner side of the stepped rectification grille is connected with the outer wall of the inner cylinder, and the outer side of the stepped rectification grille is connected with the inner wall of the outer cylinder; The dust collection plate comprises a fixing base and a honeycomb dust collection plate mounted on the fixing base. The honeycomb dust collection plate is connected with a high-voltage power supply through a quick-plug terminal. A rapper for knocking the honeycomb dust collection plate is arranged at the lower part of the dust collection plate. A second dust recovery cabin is arranged at the bottom of the electrostatic dust collection section, the second dust recovery cabin is provided with a third dust recovery box, and the rapper and the high-voltage power supply are respectively connected with the control device.

2. The municipal road construction dust control device according to claim 1, characterized in that, The stepped rectification grille is composed of three grille plates distributed in parallel at intervals, and the aperture and opening rate of the three grille plates are all set to decrease sequentially from top to bottom.

3. The municipal road construction dust control device according to claim 1, characterized in that, The inner cylinder is provided with coaxially distributed return air pipes. The bottom end of the return air pipe is connected to the first dust collection chamber, and the top end of the return air pipe is connected to the inner cavity of the charged section.

4. The municipal road construction dust control device according to claim 1, characterized in that, The charged section is in the shape of a bent tube, and the top of the charged section is provided with a mounting frame with a slot. The needle plate corona electrode includes an insulating support, a tungsten needle array and an anode plate. The tungsten needle array is composed of several tungsten alloy needles fixed on a brass needle holder. The anode plate is a 304 stainless steel plate. The brass needle holder and the anode plate are fixed on the insulating support, and the insulating support is plugged into the slot.

5. The municipal road construction dust control device according to any one of claims 1 to 4, characterized in that, The chassis is equipped with a solar energy storage power supply system, which includes a foldable solar panel, an MPPT controller, and a lithium battery. The foldable solar panel and the lithium battery are respectively connected to the MPPT controller, and the MPPT controller is connected to the control device.

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