Water curtain dust removal device and dust removal method thereof

Abstract

The invention discloses a water curtain dust removal device, and belongs to the technical field of industrial dust removal. The device comprises a dust removal cavity, a sewage pool, a clean water pool, a dust-containing air inlet, a water inlet, a plurality of drainage net plates which are horizontally arranged in a staggered manner, a clean air outlet and an inverted bowl-shaped water drop removal baffle, the hydrophobic net plate is an arc-shaped metal net surface, and a negative pressure area is formed on a concave surface by utilizing a Bernoulli effect generated when airflow flows through a convex surface, so that stable retention and uniform distribution of a liquid film are realized, gas-liquid contact is enhanced, and efficient trapping of fine dust and light spice dust is realized; the inverted bowl-shaped water drop removing baffle removes liquid drops in airflow through collision, interception and liquid drop coalescence, secondary entrainment is avoided, and air is kept dry. The device can stably operate without a Venturi tube or a high-voltage electrostatic device, is compact in structure, simple and convenient to maintain, high in energy efficiency, safe and reliable, and is suitable for complex dust treatment of tobacco and similar industrial scenes.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of industrial dust removal, and particularly relates to a water curtain dust removal device and a dust removal method thereof. BACKGROUND

[0002] Water curtain dust removal technology is a widely used dust control method in the tobacco industry, mainly used for treating dust-containing waste gas generated in the tobacco processing process. These waste gases usually contain tobacco dust, cigarette ends, fibers, and spice additives. The basic principle is to make the dust-containing gas impact or pass through the water curtain, water film or atomized liquid droplets, and use the adsorption, interception and coagulation of the liquid phase on the dust particles to realize gas-solid separation. The purified gas is discharged, and the dust is discharged with the liquid. This technology is applied in the tobacco industry because it can effectively treat dust within a certain particle size range, has a cooling effect, and has a relatively low cost compared to other dust removal methods.

[0003] However, the traditional water curtain dust removal technology faces significant challenges when dealing with complex physical properties of tobacco dust. In general, the particle size distribution of tobacco dust is wide (about 0.1 μm to 500 μm), and PM2.5 and other fine particulate matter and light spice dust account for a large proportion of the total dust. Such particles are difficult to be effectively captured by liquid droplets through the traditional water curtain dust removal mechanism of inertia collision and interception due to their light weight and small inertia, and are easily dispersed with the airflow, resulting in a significant decrease in the capture efficiency of fine particles by the system, making it difficult to meet the increasingly stringent dust emission requirements.

[0004] To improve the capture efficiency of fine particles, existing technologies usually introduce Venturi tubes or electrostatic dust removal and other strengthening measures. The Venturi tube accelerates the airflow by narrowing the throat to make the water mist collide and coagulate with the dust at high speed, which can effectively solve the problem of capturing small particles and light fine dust. However, the Venturi tube itself has high requirements for airflow stability and needs to be equipped with a special adjustment system and stabilizing device to maintain the best working state. This not only increases the complexity of the system, but also because of the inherent airflow fluctuations in the tobacco production process (such as equipment start-stop, process switching, etc.), its performance will still be affected and fluctuate. At the same time, the Venturi tube needs to add a throat section and a high-pressure water supply device to achieve precise atomization and efficient coagulation, and the strong abrasive nature of tobacco dust and the corrosion effect of high humidity environment will accelerate the wear and failure of key components such as the throat of the Venturi tube. In addition, the high organic matter content of tobacco dust is prone to fouling in the throat of the Venturi tube, which will affect the airflow acceleration effect, and when the fouling is serious, it will be easily blocked, and frequent shutdown and replacement are required, significantly increasing the maintenance cost.

[0005] On the other hand, electrostatic precipitators use a high-voltage electric field to charge dust particles, which are then captured by the collector. While component wear is relatively minor, their applicability to the tobacco industry is still limited. This technology requires a high-voltage power supply, insulation system, and dust removal device to achieve continuous and stable operation, significantly increasing equipment complexity and investment costs. Furthermore, the high humidity and explosive environment unique to the tobacco industry poses safety hazards, requiring additional explosion-proof measures, further increasing system complexity and operating costs.

[0006] Existing technologies improve dust removal efficiency by increasing system complexity, which not only leads to a significant increase in equipment investment and operating costs, but also brings many new problems such as frequent maintenance and safety hazards. There is still a lack of a fundamental solution that can efficiently capture tobacco fine dust while maintaining stable and low-consumption system operation.

[0007] This application is submitted to address the aforementioned issues. Summary of the Invention

[0008] To address the problems of low fine particle capture efficiency, complex system structure, poor operational stability, and high maintenance costs in existing technologies, this invention aims to provide a water curtain dust removal device. This device utilizes an arc-shaped hydrophobic mesh plate with a specific curvature inside the dust removal chamber. As the airflow passes over the convex surface of the mesh plate, a Bernoulli effect occurs, creating a stable negative pressure zone in its concave area. This achieves stable retention and uniform distribution of the liquid film, significantly enhancing the contact area and contact time between the gas and liquid, and effectively improving the capture efficiency of fine dust such as PM2.5 and light fragrance dust. Simultaneously, this invention incorporates an inverted bowl-shaped water droplet-removing baffle at the clean air outlet. Utilizing its arc-shaped guiding surface and mesh interception effect, it achieves efficient removal of droplets from the humid airflow, avoiding the secondary entrainment and excessive pressure loss problems easily caused by traditional flat baffles. This ensures stable operation of the system even under fluctuating airflow conditions. Furthermore, this invention utilizes a combined circulating design of a wastewater tank, filter, and clean water tank to achieve solid-liquid separation and reuse of the water used in the dust removal process. This not only reduces operating energy consumption and fresh water consumption but also decreases maintenance frequency and operating costs. Therefore, this invention can achieve efficient collection and stable dust removal of complex tobacco dust without relying on venturi tubes or high-voltage electrostatic devices, balancing system economy, safety, and long-term reliability.

[0009] The technical solution adopted in this invention is as follows:

[0010] The first aspect of the present invention provides a water curtain dust removal device, comprising: a dust removal chamber 1, the bottom of which is open and located in a sewage tank 2; the sewage tank 2, which is connected to a clean water tank 4 through a pipe equipped with a filter 3; a dust-laden air inlet 5, disposed on the lower part of the side wall of the dust removal chamber 1; a water inlet 6, disposed on the top of the dust removal chamber 1; multiple hydrophobic mesh plates 7, horizontally and detachably connected to the interior of the dust removal chamber 1; a clean air outlet 8, disposed on the upper part of the side wall of the dust removal chamber 1; a water droplet baffle 9, fixedly installed at the top of the interior of the chamber below the clean air outlet 8; a water supply pipe, connecting the clean water tank 4 and the water inlet 6, and equipped with a pumping device for driving water flow from the clean water tank 4 to the water inlet 6; the pipe between the sewage tank 2 and the clean water tank 4 is configured to allow liquid to flow from the sewage tank 2 through the filter 3 to the clean water tank 4.

[0011] Preferably, a filter pump is installed on the pipeline to provide power for the liquid to flow through the filter 3.

[0012] Preferably, the liquid level of the sewage tank 2 is configured to be continuously higher than the liquid level of the clean water tank 4, so as to drive the liquid to flow through the filter 3 by means of the liquid level difference.

[0013] Preferably, the hydrophobic mesh plate 7 includes a metal frame 71 and an arc-shaped metal mesh surface 72 fixed on the metal frame 71, wherein the arc-shaped metal mesh surface 72 is uniformly covered with through mesh.

[0014] Preferably, the concave side of the arc-shaped metal mesh 72 is arranged facing upwards.

[0015] It is understood that the cross-sectional profile of the arc-shaped metal mesh 72 is not limited to the preferred circular arc described above. It can also be any smooth curved surface that can guide airflow acceleration and generate the required negative pressure, such as an aerodynamic curve or parabola that mimics the shape of the upper surface of an airfoil. All of these fall within the protection scope of this invention.

[0016] Preferably, multiple pairs of fixing slots 11 are provided on the inner walls of the dust removal chamber 1 from top to bottom; the two ends of the hydrophobic mesh plate 7 are detachably fixed in the corresponding fixing slots 11 by means of a metal frame 71; an airflow channel 73 is provided at one end of the hydrophobic mesh plate 7 near the inner wall of the chamber, and multiple horizontally arranged hydrophobic mesh plates 7 are staggered in the chamber, so that the multi-layer airflow channels 73 are staggered in the vertical direction, thereby forcing the rising airflow to flow through the airflow channels 73 along an S-shaped meandering path in the chamber.

[0017] Preferably, the water droplet-removing baffle 9 is an inverted bowl-shaped mesh component, the mesh of which forms an air passage for airflow.

[0018] Preferably, the de-drip baffle 9 is an inverted bowl-shaped mesh component. This structural design is based on a comprehensive consideration of aerodynamics and fluid mechanics. Compared with traditional flat baffles, the inverted bowl shape has a larger effective surface area, allowing the airflow carrying droplets to undergo more thorough impact, adhesion, and coalescence on its surface. At the same time, the bowl-shaped arc shape forces the airflow to circulate along its surface, prolonging the gas-liquid contact path and time, thereby improving the de-drip efficiency. Its arc surface structure also forms a natural guide surface, allowing droplets to converge downwards along the arc surface under the action of gravity to the guide point at the edge of the bowl, where they gather into larger droplets before dripping. This avoids the secondary entrainment phenomenon caused by droplets accumulating at the bottom of the flat plate and being torn apart and blown away by the high-speed airflow.

[0019] Furthermore, the filaments of the mesh component can directly intercept larger droplets in the airflow, while fine droplets are adsorbed due to Brownian motion colliding with the surface of the filaments as they pass through the mesh. Multiple small droplets gradually coalesce into larger droplets on the filaments, and detach when their weight is sufficient to overcome the drag force of the airflow and surface tension, thus achieving efficient capture. Because the mesh structure forms micro-vortices at its tail, it can also promote the collision and agglomeration of fine droplets, further improving the de-drip effect. At the same time, the mesh component maintains the unobstructed airflow channel, avoiding the significant wind pressure loss that solid baffles can easily cause, thus achieving both efficient demisting and low operating resistance.

[0020] In summary, the inverted bowl-shaped mesh component not only effectively solves the problems of secondary droplet entrainment and excessive pressure loss in traditional flat plate baffles, but also achieves efficient droplet removal while ensuring smooth airflow, further improving the overall purification efficiency of the device.

[0021] Preferably, the mesh size of the water droplet deflector 9 should be set according to the dust removal air volume and cleaning fluid flow rate, ranging from 20 to 60 mesh in typical tobacco dust removal scenarios. This mesh size range ensures sufficient mechanical strength and excellent collection efficiency while keeping airflow resistance at a low level.

[0022] Preferably, the dust removal chamber 1 has an openable sealed door 10 on its side.

[0023] Preferably, the dust-laden air inlet 5 is connected to a variable frequency fan via a pipe.

[0024] Preferably, the water curtain dust removal device may further include a control system, which is electrically connected to the variable frequency fan, the water pump, and / or the filter pump. The control system is configured to: dynamically adjust the frequency of the variable frequency fan to change the airflow based on the wind pressure sensor signal at the dust-laden air inlet 5, and simultaneously adjust the rotational speed of the water supply drive device to change the water supply, thereby maintaining the air-to-water ratio within the dust removal chamber 1 within the optimal dust removal efficiency range.

[0025] Preferably, the arc-shaped metal mesh 72 is an arc with gradually changing curvature, and its outline includes a front section with a small radius of curvature for guiding airflow acceleration and a rear section with a large radius of curvature for guiding airflow deceleration and diffusion.

[0026] The optimal arc-shaped metal mesh surface 72 features a gradually changing curvature profile, which is the core of achieving efficient dust removal. As a preferred embodiment, the mesh surface is constructed as an arc with a gradually changing curvature, characterized by including a front acceleration zone with a small radius of curvature and a rear diffusion zone with a larger radius of curvature that smoothly transitions to it. This structure achieves a synergistic dust removal mechanism through staged airflow regulation.

[0027] First, in the initial acceleration zone, the flow channel contracts sharply, significantly increasing the airflow velocity. This generates Bernoulli negative pressure, providing propulsion for the liquid's downward movement; on the other hand, it imparts higher kinetic energy to the dust particles.

[0028] Subsequently, in the rear diffusion zone, the flow channel cross-section gradually expands, causing the airflow to decelerate and diffuse in an orderly manner. At this time, the dust particles that have been accelerated in the airflow cannot decelerate and turn sufficiently with the airflow due to their own inertia, thus separating from the airflow and fully impacting the liquid film on the inner wall of the cavity (this liquid film is provided by the overflow of the upper mesh plate and the downward water flow formed on the cavity wall by the top water distribution), achieving efficient dust removal based on inertial collision.

[0029] The negative pressure generated in the front acceleration zone of this structure is crucial for forming a uniform rain zone and overcoming the lifting force. More importantly, this acceleration process endows dust particles with the high inertia required for capture. Subsequently, in the rear diffusion zone, the airflow decelerates due to the expansion of the flow channel. According to the inertial effect, larger dust particles tend to maintain their original direction of motion, thus separating from the decelerating and changing airflow, and finally impacting the sidewall liquid film to complete efficient capture.

[0030] A second aspect of the present invention provides a method for dust removal using the water curtain dust removal device described in the first aspect, comprising the following steps:

[0031] Step (1): Start the water circulation system and use the water pump to send the washing liquid from the water purification tank 4 into the top of the dust removal chamber 1 through the water inlet 6;

[0032] Step (2): The dust-laden air to be treated is introduced into the lower part of the dust removal chamber 1 from the dust-laden air inlet 5, and the dust-laden air is driven to flow upward.

[0033] Step (3): As the dust-laden air flows upward, it undergoes the following purification stages in sequence:

[0034] a) First, it comes into initial contact with and is washed by the rain zone formed by the droplets falling from the inlet 6 and the upper hydrophobic mesh plate (7); b) Subsequently, when the airflow passes through the arc-shaped metal mesh 72, the Bernoulli effect generated by its convex structure forms a negative pressure zone, which coordinates and regulates the pressure distribution above and below the mesh plate, causing the liquid to fall evenly and stably from the mesh plate area, forming a rain zone. At the same time, it guides part of the dust-laden airflow to collide with the flowing liquid film formed by the upper liquid on the inner wall of the cavity, achieving efficient dust collection through inertial collision. c) Next, the airflow flows sequentially along the airflow channel 73 near the inner wall of the cavity of each layer of hydrophobic mesh plate 7. In the S-shaped path formed by the staggered arrangement of multiple layers of hydrophobic mesh plates, it comes into full contact with the droplets in the space and the liquid film on the cavity wall to achieve deep purification.

[0035] Step (4): The humid air after washing continues to rise and hits the water droplet removal baffle 9 located below the clean air outlet 8. Through collision, interception and aggregation, the droplets it carries are removed, and the captured droplets flow back to the lower part of the dust removal chamber 1 along the surface of the baffle.

[0036] Step (5): Discharge the finally purified dry air from the clean air outlet 8;

[0037] Step (6): The sewage collected in the sewage tank 2 is separated into solid and liquid by a filter pump or by relying on the liquid level difference and then enters the water purification tank 4 for recycling.

[0038] The advantages of this invention over the prior art are as follows:

[0039] 1. This invention innovatively utilizes an arc-shaped hydrophobic mesh plate with a specific curvature, cleverly employing the Bernoulli effect generated when airflow passes over the convex surface of the mesh plate to create a stable negative pressure zone on the concave surface. This negative pressure, in conjunction with the mesh plate structure, establishes a stable downward net pressure difference within the system. This pressure distribution not only promotes the stable formation of some liquid on the mesh plate surface, greatly increasing the gas-liquid contact area and contact time; more importantly, it effectively overcomes the lifting force of the rising airflow, driving the liquid to uniformly and stably drip down from the mesh plate, forming a rain-drenched area.

[0040] Meanwhile, the arc-shaped structure, through its flow field design that first accelerates and then diffuses, allows the dust-laden airflow to diffuse orderly at the rear of the mesh plate, guiding highly inertial dust particles away from the airflow line and fully impacting the liquid film on the inner wall of the cavity. Ultimately, the synergistic effect of liquid film adsorption and spatial rain formation constitutes a composite dust removal system, significantly enhancing the adsorption, interception, and agglomeration efficiency of fine dust such as PM2.5 and lightweight fragrance dust, solving the technical problem of insufficient fine particle capture capacity in traditional water curtain dust removal systems.

[0041] 2. This invention employs an inverted bowl-shaped mesh baffle to remove water droplets. Its unique structure combines multiple mechanisms, including increased surface area, extended airflow path, airflow guidance and coalescence, and mesh interception. It not only efficiently captures droplets in humid air through collision, adsorption, and coalescence, but its arc-shaped guiding surface also ensures that the captured droplets smoothly converge and fall, completely avoiding the problem of droplets accumulating at the bottom of traditional flat baffles and being secondary dispersed and carried by the airflow. This ensures the dryness and cleanliness of the outlet air, resulting in a significant integrated dust removal and demisting effect.

[0042] 3. The entire dust removal process does not rely on complex components such as venturi tubes or high-voltage electrostatic discharge devices, which have stringent requirements for airflow stability or working environment. The negative pressure water-holding effect formed by the arc-shaped mesh plate is adaptive, and the low-resistance characteristics of the bowl-shaped baffle plate result in low overall system pressure loss. Combined with the use of a variable frequency fan, this device can still maintain a highly efficient and stable operating state when facing the common fluctuations in air volume and dust concentration in tobacco production, significantly improving reliability.

[0043] 4. The device eliminates complex and easily damaged components such as venturi tubes, high-voltage power supplies, and insulators. The core dust removal function is achieved through a meticulously designed mechanical structure including an arc-shaped mesh plate and a bowl-shaped baffle. This results in a simpler and more compact structure, reducing initial manufacturing costs and significantly minimizing downtime and high maintenance expenses caused by wear and corrosion. The hydrophobic mesh plate uses a single-sided slotted, detachable connection, combined with a sealed chamber door, making cleaning, inspection, and replacement of the core components exceptionally easy, significantly reducing maintenance workload and labor intensity.

[0044] 5. The closed-loop water circulation system, consisting of a sewage tank, a filter, and a clean water tank, enables the recycling of washing water, significantly reducing the consumption of fresh water and wastewater discharge. Furthermore, since this invention does not require high-pressure water for the venturi tube or high-voltage electricity for the electrostatic precipitator, its operating energy consumption is significantly lower than that of traditional enhanced dust removal systems, demonstrating outstanding energy and water conservation advantages and long-term economic efficiency.

[0045] 6. This system employs a purely physical dust removal principle. Its core functions are achieved through mechanical structures such as arc-shaped hydrophobic mesh plates and inverted bowl-shaped baffles. It does not rely on high-precision water supply or high-voltage electric fields, therefore its performance will not significantly degrade due to fluctuations in operating conditions or environmental changes, exhibiting excellent long-term stability and service life. Furthermore, the entire system contains no high-voltage electrical components, fundamentally eliminating potential electrical safety hazards in high-humidity, explosive tobacco dust environments, resulting in extremely high safety performance. This device is not only suitable for the efficient treatment of complex dust in the tobacco industry, but its stable, safe, and efficient characteristics also make it widely applicable in industrial fields such as metallurgy, building materials, and chemicals, which face similar fine particulate matter dust removal challenges. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0047] Figure 1 This is a schematic diagram of the overall connection structure of the water curtain dust removal device of the present invention;

[0048] Figure 2 This is a schematic diagram of the main structure of the dust removal device of the present invention;

[0049] Figure 3 This is a schematic diagram of the dust removal chamber structure of the dust removal device of the present invention;

[0050] Figure 4 This is a top view of the hydrophobic mesh panel;

[0051] Figure 5 This is a schematic diagram of the three-dimensional structure of the hydrophobic mesh plate;

[0052] Reference numerals: 1. Dust removal chamber; 11. Fixing slot; 2. Sewage tank; 3. Filter; 4. Clean water tank; 5. Dust-laden air inlet; 6. Water inlet; 7. Drainage mesh plate; 71. Metal frame of drainage mesh plate; 72. Curved metal mesh surface; 73. Airflow channel of drainage mesh plate; 8. Clean air outlet; 9. Water droplet baffle; 10. Sealed chamber door. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0054] Example 1

[0055] like Figures 1 to 5 As shown, this embodiment provides a water curtain dust removal device, including a dust removal chamber 1, a sewage tank 2, a filter 3, a clean water tank 4, a dust-laden air inlet 5, a water inlet 6, a water-repellent mesh plate 7, a clean air outlet 8, and a water droplet removal baffle 9.

[0056] The dust removal chamber 1 is a vertical cylindrical structure with an open bottom that sits directly in the sewage tank 2, allowing the wastewater from washing to flow naturally into the sewage tank 2. A dust-laden air inlet 5 is located on the lower part of the side wall of the dust removal chamber 1, a water inlet 6 is located on the top, and a clean air outlet 8 is located on the upper part of the side wall. A water droplet baffle 9 is fixedly installed at the top of the chamber interior below the clean air outlet 8.

[0057] The wastewater tank 2 is connected to the clean water tank 4 via a pipeline equipped with a filter 3. In this embodiment, a filter pump is installed on the pipeline to provide power for the liquid to flow through the filter 3. It is understood that in other embodiments, the liquid level in the wastewater tank 2 can be configured to be continuously higher than the liquid level in the clean water tank 4, using the liquid level difference to drive the liquid to flow through the filter 3.

[0058] The hydrophobic mesh plate 7 is horizontally and detachably connected to the interior of the dust removal chamber 1 in a staggered manner. Specifically, multiple pairs of fixing slots 11 are arranged from top to bottom on the opposite inner walls of the dust removal chamber 1; the hydrophobic mesh plate 7 includes a metal frame 71 and an arc-shaped metal mesh surface 72 fixed to the metal frame 71, the arc-shaped metal mesh surface 72 having uniformly distributed through-mesh holes, and its concave surface facing upward. The two ends of the hydrophobic mesh plate 7 are detachably secured in the corresponding fixing slots 11 through the metal frame 71.

[0059] The arc-shaped metal mesh 72 adopts an arc-shaped design with gradually changing curvature. Its outline includes a front acceleration zone with a small radius of curvature and a rear diffusion zone with a large radius of curvature that is smoothly connected to it, and the whole has a gourd-shaped structure.

[0060] The hydrophobic mesh plate 7 is provided with an airflow channel 73 at one end near the inner wall of the cavity. Multiple horizontally arranged hydrophobic mesh plates 7 are staggered in the cavity, so that the multi-layer airflow channels 73 are staggered in the vertical direction, thereby forcing the rising airflow to flow along an S-shaped meandering path in the cavity.

[0061] The water droplet remover baffle 9 is an inverted bowl-shaped mesh component, with its mesh openings forming air passages for airflow. In this embodiment, the water droplet remover baffle 9 has a mesh size of 40. This mesh size range ensures sufficient mechanical strength, achieves excellent collection efficiency, and keeps airflow resistance at a low level.

[0062] The dust-laden air inlet 5 is connected to a variable frequency fan via a pipe to control the air intake volume. The water curtain dust removal device also includes a control system, which is electrically connected to the variable frequency fan, the water pump, and the filter pump. The control system is configured to dynamically adjust the frequency of the variable frequency fan to change the air volume based on the wind pressure sensor signal at the dust-laden air inlet 5, and simultaneously adjust the rotation speed of the water pump to change the water supply, thereby maintaining the air-to-water ratio in the dust removal chamber 1 within the optimal dust removal efficiency range.

[0063] Example 2

[0064] This embodiment provides a method for dust removal using the water curtain dust removal device described in Embodiment 1, including the following steps:

[0065] (1) Start the water circulation system: The washing liquid from the water purification tank 4 is sent to the top of the dust removal chamber 1 through the water inlet 6 by the water pump device, and the water supply flow rate is controlled at 5-10m³ / h.

[0066] (2) Introduce dust-laden air: Start the variable frequency fan and introduce the dust-laden air to be treated into the lower part of the dust removal chamber 1 from the dust-laden air inlet 5. The air volume is controlled at 3000-5000 m³ / h, and the dust-laden air is driven to flow upward.

[0067] (3) Multi-stage purification process: As the dust-laden air flows upward, it undergoes the following purification stages in sequence:

[0068] a) Preliminary washing in the rain zone: The dusty air first comes into preliminary contact with and is washed by the rain zone formed by the droplets falling from the water inlet 6 and the upper hydrophobic mesh plate 7, removing larger particles.

[0069] b) Inertial collision capture: When the airflow passes through the arc-shaped metal mesh 72, the Bernoulli effect generated by its convex structure creates a negative pressure zone, which coordinates and regulates the pressure distribution above and below the mesh, causing the liquid to fall evenly and stably from the mesh area; at the same time, after the airflow is accelerated in the front acceleration zone, it decelerates and diffuses in the rear diffusion zone, causing the dust particles with high inertia in the dust-laden airflow to detach from the airflow line and fully collide with the flowing liquid film formed by the upper liquid on the inner wall of the cavity, thus achieving efficient capture based on inertial collision;

[0070] c) Deep purification: The airflow flows sequentially along the airflow channel 73 near the inner wall of the cavity of each layer of hydrophobic mesh plate 7. In the S-shaped path formed by the staggered arrangement of multiple layers of hydrophobic mesh plates, it comes into full contact with the droplets in the space and the liquid film on the cavity wall to achieve deep purification.

[0071] (4) Water droplet removal: The humid air after washing continues to rise and hits the water droplet removal baffle 9 located below the clean air outlet 8. Through collision, interception and aggregation, the droplets it carries are removed, and the captured droplets flow back to the lower part of the dust removal chamber 1 along the surface of the baffle.

[0072] (5) Discharge purified air: The finally purified dry air is discharged from the clean air outlet 8;

[0073] (6) Water recycling: The sewage collected in the sewage tank 2 is driven by the filter pump to flow through the filter 3 for solid-liquid separation, and then enters the water purification tank 4 for recycling.

[0074] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, alterations, additions or substitutions made by those skilled in the art within the scope of the present invention should be protected by the present invention.

Claims

1. A water curtain dust removal device, characterized in that, include: The dust removal chamber (1) has an opening at its bottom and is located in the sewage tank (2); The sewage tank (2) is connected to a clean water tank (4) through a pipe equipped with a filter (3); The dust-laden air inlet (5) is located on the lower part of the side wall of the dust removal chamber (1); The water inlet (6) is located at the top of the dust removal chamber (1); Multiple hydrophobic mesh plates (7) are horizontally and detachably connected to the inside of the dust removal chamber (1); A clean air outlet (8) is located on the upper part of the side wall of the dust removal chamber (1); A water droplet baffle (9) is fixedly installed at the top of the cavity below the clean air outlet (8); A water supply pipeline connects the water purification tank (4) and the water inlet (6), and is equipped with a pumping device to drive water flow from the water purification tank (4) to the water inlet (6); The pipeline between the sewage tank (2) and the water purification tank (4) is configured to allow liquid to flow from the sewage tank (2) through the filter (3) to the water purification tank (4).

2. The water curtain dust removal device according to claim 1, characterized in that, A filter pump is installed on the pipeline to provide power for the liquid to flow through the filter (3).

3. The water curtain dust removal device according to claim 1, characterized in that, The liquid level of the wastewater tank (2) is configured to be continuously higher than that of the water purification tank (4) so ​​as to drive the liquid to flow through the filter (3) by means of the liquid level difference.

4. The water curtain dust removal device according to claim 1, characterized in that, The hydrophobic mesh plate (7) includes a metal frame (71) and an arc-shaped metal mesh surface (72) fixed on the metal frame (71), wherein the arc-shaped metal mesh surface (72) is uniformly covered with through mesh.

5. A water curtain dust removal device according to claim 4, characterized in that, The concave side of the arc-shaped metal mesh (72) is facing upwards.

6. The water curtain dust removal device according to claim 4 or 5, characterized in that, The dust removal chamber (1) has multiple pairs of fixed slots (11) arranged from top to bottom on the inner wall of the chamber. The two ends of the hydrophobic mesh plate (7) are detachably fixed in the corresponding fixed slots (11) by means of a metal frame (71). The end of the hydrophobic mesh plate (7) near the inner wall of the chamber is provided with an airflow channel (73). Multiple horizontally arranged hydrophobic mesh plates (7) are staggered in the chamber, so that the multi-layer airflow channels (73) are staggered in the vertical direction, thereby forcing the rising airflow to flow through the airflow channels (73) along an S-shaped meandering path in the chamber.

7. The water curtain dust removal device according to claim 1, characterized in that, The water-removing baffle (9) is an inverted bowl-shaped mesh component, and its mesh holes form an air passage for airflow.

8. The water curtain dust removal device according to claim 1, characterized in that, The dust removal chamber (1) has an openable sealed door (10) on its side.

9. A water curtain dust removal device according to claim 1, characterized in that, The dust-laden air inlet (5) is connected to a variable frequency fan via a pipe.

10. The water curtain dust removal device according to claim 4 or 5, characterized in that, The arc-shaped metal mesh (72) is an arc with gradually changing curvature. Its outline includes a front section with a small radius of curvature for guiding the airflow to accelerate and a rear section with a large radius of curvature for guiding the airflow to decelerate and diffuse.

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