Water-collecting water-saving type demister vane and demister

Abstract

The utility model relates to a demister technical field, concretely relates to a water collecting water saving type demister vane and demister, and the demister vane includes: vane main part has the curved surface of guiding airflow, including the windward side and leeward side for intercepting mist drop, first water collecting groove, integrative forming sets up in the windward side of vane main part, is used for collecting the liquid drop of falling along the windward side, second water collecting groove, integrative forming sets up in the leeward side of vane main part, is used for intercepting and capturing residual mist drop with airflow, wherein, the curved surface design can effectively intercept mist drop in airflow, and guide mist drop to specific direction convergence, the utility model discloses through the curved surface design effective interception mist drop and guide convergence, prevent liquid drop secondary entrainment in combination double water collecting groove structure, and the reinforcing rib and wave shape cross section have strengthened the structural strength and optimized airflow path, have the advantages such as improving mist drop interception efficiency, preventing liquid drop secondary entrainment, strengthening structural strength and optimizing airflow path.

Description

Technical Field

[0001] This utility model relates to the field of demisters, specifically a water-saving demister blade and demister. Background Technology

[0002] Many industrial production processes, such as flue gas desulfurization in thermal power plants, reactor exhaust in chemical plants, and smelting tail gas treatment in the metallurgical industry, generate large amounts of gases containing mist droplets. If these droplets are not properly managed, they can cause a series of problems. On the one hand, mist droplets can cause corrosion, wear, and blockages in downstream equipment, severely affecting its normal operation and lifespan, and increasing equipment maintenance costs for enterprises. On the other hand, emissions of gases containing mist droplets do not meet increasingly stringent environmental standards, polluting the environment and harming ecological balance and human health.

[0003] Traditional demister blades have revealed several drawbacks in practical applications. First, their water collection efficiency is poor. For smaller, faster-moving droplets, traditional blades struggle to effectively capture them, resulting in some droplets being discharged with the gas, wasting water resources and exacerbating environmental pollution. This is mainly due to the unscientific structural design of traditional blades, which fails to fully consider the droplet's motion characteristics and interception principles, making it easy for droplets to be re-entrained on the blade surface and re-mixed into the airflow. Second, traditional blades perform poorly in terms of water conservation. Even if they can intercept some droplets, the lack of proper collection and guidance measures for these droplets allows them to flow freely on the blade surface, with some dripping directly onto other parts of the equipment, making recycling impossible and further wasting water resources.

[0004] With increasingly stringent environmental protection requirements and growing emphasis on energy conservation and emission reduction in industrial production, developing a demister blade and demister with high water collection efficiency and water-saving performance has become an urgent priority. This new type of demister blade needs an optimized curved surface design to improve droplet interception efficiency, along with a reasonable water collection structure to prevent secondary droplet entrainment and effectively guide and recover the collected droplets. Furthermore, the overall structural strength of the blade and the optimized design of the airflow channel must be considered to achieve more efficient demisting and a longer service life. Existing technologies urgently need improvement to address these issues. Utility Model Content

[0005] The purpose of this application is to provide a water-saving demister blade and demister, which has the advantages of improving droplet interception efficiency, preventing secondary entrainment of droplets, enhancing structural strength, and optimizing airflow path.

[0006] This application provides a water-saving demister blade, the technical solution of which is as follows: A water-saving demister blade includes: a blade body having a curved surface for guiding airflow, the curved surface including a windward side and a leeward side; a first water collection tank integrally formed on the windward side of the blade body for collecting droplets falling along the windward side; and a second water collection tank integrally formed on the leeward side of the blade body for intercepting and capturing residual mist droplets carried by the airflow; wherein, the curved surface is designed to effectively intercept mist droplets in the airflow and guide the mist droplets to converge in the first and second water collection tanks.

[0007] Furthermore, the first water collection tank has an inwardly curled J-shaped or C-shaped cross-section, with its opening facing the windward side of the blade body to prevent the collected droplets from being entrained by the airflow.

[0008] Furthermore, the second water collection tank is an interception hook extending from the leeward side of the blade body. The opening direction of the interception hook is opposite to the airflow direction, which is used to finally intercept the escaping fine mist droplets.

[0009] Furthermore, the blade body is provided with an arc-shaped reinforcing rib, which forms a preset angle with the blade body and extends along the length direction of the blade body.

[0010] Furthermore, the curved surface is wavy or S-shaped to form a tortuous airflow path.

[0011] Furthermore, the blade body includes at least two counter-curved arc segments, causing the airflow to change direction at least twice as it passes through.

[0012] A demister includes a frame and a plurality of demister blades, as described above, arranged in parallel within the frame, with airflow channels formed between adjacent demister blades for the passage of mist-containing gas.

[0013] Furthermore, a water collection tank is provided at the bottom of the frame for collecting liquid discharged from the demister blades.

[0014] Furthermore, the inner surface of the first water collection tank and / or the second water collection tank is provided with a hydrophobic coating.

[0015] As can be seen from the above, the water-collecting and water-saving demister blades and demister provided in this application effectively intercept and guide droplets through curved surface design, and prevent secondary entrainment of droplets by combining a double water collection tank structure. At the same time, the reinforcing ribs and wave-shaped cross-section enhance the structural strength and optimize the airflow path, which has the advantages of improving droplet interception efficiency, preventing secondary entrainment of droplets, enhancing structural strength and optimizing airflow path. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the demister blades in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the demister according to an embodiment of the present invention.

[0018] In the diagram: 1. Frame; 2. Demister blades; 4. Blade body; 5. First water collection tank; 6. Second water collection tank; 7. Reinforcing ribs. Detailed Implementation

[0019] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Analysis of droplet trajectories revealed that droplets, after accumulating on the blade surface, are susceptible to airflow shearing. A multi-stage capture mechanism can be formed by installing a droplet collection device on the airflow impact surface and adding a secondary interception structure on the leeward side. Further consideration is to integrate the collection device with the blade body, which could prevent droplet leakage caused by assembly gaps.

[0021] like Figure 1 As shown, the demister blade includes a blade body 4, a first water collection tank 5, and a second water collection tank 6. The first water collection tank 5 is integrally formed on the windward side of the blade body 4 and is used to collect droplets falling along the windward side. The second water collection tank 6 is integrally formed on the leeward side of the blade body 4 and is used to intercept and capture residual mist droplets passing with the airflow. The curved surface design effectively intercepts mist droplets in the airflow and guides the droplets to converge in the first and second water collection tanks 5 and 6.

[0022] The blade body 4 has a curved surface that guides airflow, comprising a windward side and a leeward side for intercepting droplets. A first water collection tank 5 is located on the windward side to collect falling droplets, and a second water collection tank 6 is located on the leeward side to capture residual droplets. The curved surface design causes droplets to converge towards the first water collection tank 5 and the second water collection tank 6.

[0023] The blade body 4 refers to the structural component that carries the airflow channel. It can be injection molded from a polymer composite material, and the curved surface formed by its windward and leeward sides can change the airflow direction. The first water collection trough 5 refers to the groove structure located at the edge of the windward side, which can be an inwardly curled J-shaped cross-section that traps droplets through surface tension. The second water collection trough 6 refers to the hook-shaped structure extending from the leeward side, which can be an arc-shaped protrusion with an opening facing the opposite airflow, capturing escaping droplets through inertial collision. The curved surface design refers to a surface morphology with continuous curvature changes, which can be constructed using cubic Bézier curves, causing droplets to move towards the water collection trough under centrifugal force.

[0024] Specifically, when the mist-laden gas flows through the blade body, the airflow is deflected by the curved surface. Larger droplets, under inertia, impact the windward side and are captured by the first water collection tank 5, while smaller droplets, carried by the airflow, bypass the blade body and are intercepted by the second water collection tank 6 in the leeward vortex region. The collected droplets are guided along the inner wall of the collection tank to the bottom and eventually flow into the recovery system. The curved structure increases the contact time of the droplets by extending the airflow path, while simultaneously generating centrifugal force to cause the droplets to detach from the airflow.

[0025] Compared to existing technologies, traditional blades only have a water-blocking structure on one side, while this design uses double-sided water collection channels to form a double interception. In existing technologies, flat blades are prone to boundary layer separation; the curved surface design of this design maintains laminar flow and reduces secondary droplet entrainment. Traditional hook-shaped structures often use welding assembly; the integrated molding process of this design eliminates the risk of droplet leakage at the joints.

[0026] Through the above technical solution, this application can improve the capture efficiency of micron-sized droplets and reduce the shearing effect of airflow on the collected droplets. Droplets are centrally recovered through directional flow guidance in a water collection tank, avoiding equipment corrosion caused by disordered dripping. The curved structure improves droplet separation efficiency while reducing airflow resistance, making it suitable for high-velocity mist-containing gas treatment scenarios.

[0027] Preferably, the first water collecting tank 5 has an inwardly curled J-shaped or C-shaped cross-section, with its opening facing the windward side of the blade body 4 to prevent the collected droplets from being re-entrained by the airflow. The inwardly curled J-shaped or C-shaped structure refers to the edge of the water collecting tank bending inwards towards the blade body 4 to form a semi-enclosed space, which can be achieved using stamping or injection molding processes. This structure restricts the droplet movement path by creating a recessed area. The opening facing the windward side means that the inlet direction of the water collecting tank forms an angle with the airflow impact direction, which can be achieved by adjusting the bending angle of the curled structure. This design allows the droplets to flow down the inner wall under gravity after entering the water collecting tank.

[0028] Specifically, when the misty airflow impacts the windward side, the droplets, under inertia, strike and adhere to the inner wall of the collection tank. Due to the physical barrier formed by the curled edges of the J-shaped or C-shaped structure, the high-speed airflow cannot directly wash away the liquid surface inside the collection tank. Under gravity, the droplets slide down the inner wall to the bottom of the collection tank and are discharged through the guide channel. The opening direction forms an angle with the airflow impact direction, further reducing the shearing effect of the airflow on the droplets inside the collection tank.

[0029] Compared to existing technologies, traditional blade-type water collection channels often employ straight grooves or shallow channels with openings parallel to the airflow direction. This makes it easy for high-speed airflow to re-entrain collected droplets. This solution utilizes a semi-enclosed space created by a coiled structure to effectively block airflow disturbance of the droplets while maintaining the water collection capacity.

[0030] Through the above technical solution, this application solves the problem of secondary entrainment of droplets in traditional demister blades, enabling droplets in the water collection tank to be stably collected and discharged, avoiding repeated loss of captured water resources, and improving the water resource recovery efficiency of the demister system.

[0031] Preferably, the second water collection tank 6 is an interception hook extending from the leeward side of the blade body 4. The opening direction of the interception hook is opposite to the airflow direction, and it is used to finally intercept the escaping fine mist droplets.

[0032] The intercepting hook refers to a hook-shaped structure extending from the leeward side of the blade body. It can be implemented using an arc or zigzag design with a bending angle of 30° to 60°, and its extension length can be 1 / 5 to 1 / 3 of the blade body height. This structure forms a physical barrier through its hook-shaped end, forcing the droplets to collide with and escape the airflow. The opening direction being opposite to the airflow direction means that the concave surface of the intercepting hook faces upstream of the airflow, which can be achieved by adjusting the bending direction of the hook. This design creates localized vortices in the airflow as it passes through the hook, reducing the probability of droplet escape.

[0033] Specifically, when the mist-laden gas flows through the leeward side of the blade body, some of the fine mist droplets that are not intercepted by the windward side continue to move with the airflow. After the interception hook extends from the leeward side, its opening direction forms an angle opposite to the airflow direction, forcing the airflow to circulate around the hook body. Due to inertia, the mist droplets collide with the inner wall of the hook body and then collect downwards along the hook body surface into the water collection tank. Because the opening direction is opposite to the airflow direction, a relatively low-pressure area is formed on the concave surface of the hook body, further inhibiting the secondary entrainment of mist droplets by the airflow.

[0034] Preferably, the blade body 4 is provided with an arc-shaped reinforcing rib 7, which forms a predetermined angle with the blade body 4 and extends along the length of the blade body 4. The reinforcing rib 7 is used to enhance the overall structural strength and rigidity of the blade. Specifically, the reinforcing rib 7 refers to a longitudinal protrusion structure provided along the upper edge of the blade body 4, which can be implemented as continuous or intermittent strip-shaped protrusions, and the material is consistent with the blade body 4. Its function is to increase the local cross-sectional moment of inertia, thereby improving the blade's bending resistance under airflow impact and preventing structural deformation caused by vibration or load.

[0035] Specifically, the blade body 4 is subjected to dynamic airflow loads during operation, which can easily lead to fatigue deformation over long periods. By setting reinforcing ribs 7 at the upper edge, a stable support frame can be formed, dispersing stress concentration areas. For example, when airflow passes over the blade surface, the reinforcing ribs can limit the lateral displacement of the blade body edge, maintaining the stability of the curved surface shape, thereby ensuring that the droplet collection paths of the first and second water collection tanks are not affected by structural deformation.

[0036] Preferably, the blade body has a wavy or S-shaped curved surface to create a tortuous airflow path. The wavy or S-shaped curvature refers to a continuous arc-shaped curvature in the cross-sectional direction of the blade body, which can be achieved using periodically alternating convex and concave structures. For example, the radius of curvature of each curved segment can be 50 mm to 200 mm. The tortuous airflow path means that the airflow is forced to change direction multiple times as it passes through the blade body. This can be achieved through continuous turning channels created by the wavy or S-shaped curvature, for example, the angle of change of airflow direction can be 30 degrees to 120 degrees.

[0037] Specifically, the blade body 4 forms a continuous uneven surface through a wavy or S-shaped curved structure. When mist-laden gas flows through it, the airflow is forced to repeatedly turn along the curved surface. This structure prolongs the residence time of the airflow on the blade surface, causing the droplets to collide with the blade surface multiple times under inertia. After the collision, the droplets adhere to the blade under the action of surface tension and move along the curved surface towards the water collection tank. For example, in a flue gas desulfurization scenario, the S-shaped curved structure can intercept droplets with a particle size of 10 to 50 micrometers during the two turning processes, preventing them from escaping with the airflow.

[0038] Preferably, the blade body 4 includes at least two counter-curved arc segments, causing the airflow to change direction at least twice as it passes through. The counter-curved arc segments refer to two arc-shaped sections on the blade body that bend in opposite directions. Specifically, this can be achieved using a continuous S-shape or wave-like structure, forcing the airflow path to change direction multiple times through alternating bending directions. Changing the airflow direction means that the airflow is forced to turn multiple times as it passes through the blade, which can be achieved through the alternating bending design of the arc segments. This increases the probability of droplet contact with the blade surface by extending the residence time of the airflow in the blade area.

[0039] Specifically, the blade body 4 forms a continuously turning channel through two counter-curved arc segments. When mist-laden gas enters the blade area, it first deflects outward along the curvature of the first arc segment. At this point, larger droplets impact the surface of the arc segment due to inertia and are captured. Subsequently, when the airflow enters the second counter-curved arc segment, the direction of motion changes again, causing the fine droplets that were not intercepted in the first section to detach from the airflow due to the centrifugal force generated by the secondary turning, and finally adhere to the blade surface. This dual-turning structure increases the length of the airflow path, and the droplets undergo multiple changes in motion state within a limited space, thereby improving the interception efficiency.

[0040] This application further proposes a demister, such as Figure 2 As shown, it includes a frame 1 and multiple demister blades 2 arranged in parallel within the frame 1, with airflow channels formed between adjacent demister blades for the passage of mist-containing gas.

[0041] The frame refers to the rigid structure used to fix and support the demister blades. It can be achieved using metal profile welding or injection molding processes, and its function is to provide a stable mounting base for the blades. Multiple parallel demister blades refer to a group of blades arranged at equal or gradually varying intervals. They can be assembled with the frame using snap-fit ​​connections or bolts. Their function is to create a continuous interception surface through dense arrangement, thereby improving droplet capture efficiency. The airflow channel refers to the narrow gas flow path formed between adjacent blades. It can be achieved by adjusting the blade spacing and surface angle. Its function is to guide the airflow to generate turbulence, causing droplets to detach from the airflow after contacting the blade surface.

[0042] Specifically, frame 1, as the overall supporting structure, supports multiple parallel-arranged demister blades 2, forming airflow channels with specific spacing. When mist-laden gas flows through the channels, the water collection grooves and curved structures on the blade surfaces intercept the mist droplets. Simultaneously, the narrow design of the airflow channels forces changes in gas velocity, causing the mist droplets to adhere to the blade surfaces due to inertial collisions. The parallel-arranged blade group, through a superimposed interception effect, captures escaped mist droplets multiple times, ultimately guiding the droplets along the water collection grooves to the recovery system.

[0043] Preferably, the bottom of the frame 1 is provided with a water collection tank for collecting the liquid discharged from the demister blades 2.

[0044] Preferably, the inner surface of the first water collection tank 5 and / or the second water collection tank 6 is provided with a hydrophobic coating to promote the aggregation and flow of droplets.

[0045] Through the above technical solution, this application solves the problem of droplet escape caused by loose blade arrangement in traditional demisters. By optimizing the airflow channel and blade spacing, the droplet interception efficiency is significantly improved. At the same time, the stable assembly structure of the frame and blades reduces the frequency of equipment maintenance and extends the service life.

[0046] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A water-collecting and water-saving demister blade, characterized in that, include: The blade body (4) has a curved surface that guides airflow through, the curved surface including a windward side and a leeward side; The first water collection tank (5) is integrally formed on the windward side of the blade body (4) and is used to collect droplets falling along the windward side. The second water collection tank (6) is integrally formed on the leeward side of the blade body (4) and is used to intercept and capture residual mist droplets that pass through with the airflow. The curved surface is designed to effectively intercept fog droplets in the airflow and guide the fog droplets to converge in the first water collection tank (5) and the second water collection tank (6).

2. The water-collecting and water-saving demister blade according to claim 1, characterized in that, The first water collection tank (5) has an inwardly curled J-shaped or C-shaped cross section, and its opening faces the windward side of the blade body (4).

3. The water-collecting and water-saving demister blade according to claim 1, characterized in that, The second water collection tank (6) is an interception hook extending from the leeward side of the blade body (4), and the opening direction of the interception hook is opposite to the airflow direction.

4. The water-collecting and water-saving demister blade according to claim 1, characterized in that, The blade body (4) is provided with an arc-shaped reinforcing rib (7), which forms a preset angle with the blade body (4) and extends along the length direction of the blade body (4).

5. The water-collecting and water-saving demister blade according to claim 1, characterized in that, The curved surface is wavy or S-shaped to form a tortuous airflow path.

6. The water-collecting and water-saving demister blade according to claim 5, characterized in that, The blade body (4) includes at least two counter-curved arc segments, so that the airflow changes direction at least twice as it passes through.

7. A demister, characterized in that, include: Framework (1); Multiple demister blades (2) as described in any one of claims 1 to 6 are arranged in parallel within the frame (1), and an airflow channel for passing mist-containing gas is formed between adjacent demister blades (2).

8. The demister according to claim 7, characterized in that, The bottom of the frame (1) is provided with a water collection tank for collecting liquid discharged from the demister blades (2).

9. The demister according to claim 7, characterized in that, The inner surfaces of the first water collection tank (5) and / or the second water collection tank (6) are provided with a hydrophobic coating.

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