A vertical rotary vane water film demisting device

Abstract

The utility model relates to mist-containing waste gas treatment equipment technical field, the utility model provides a vertical type rotary -leaf water film demisting device, it includes demisting pipe body, is equipped with spiral flow guide plate in the demisting pipe body, the inner wall between spiral flow guide plate and demisting pipe body forms spiral ascending passage, and the both ends of spiral ascending passage are provided with airflow entrance and airflow exit respectively, the inner wall of airflow exit place is equipped with the reduced diameter baffle ring, the demisting pipe body is configured as, makes airflow from airflow entrance and flows, after flowing through spiral ascending passage, provides the force that mist drop centrifugal swing is oriented demisting pipe body inner tube wall direction through the rotation of airflow, and provides the force that mist drop flows along demisting pipe body inner wall, and the reduced diameter baffle ring is used for blocking mist drop. Through the above technical scheme, the technical problem that the removal effect difference of the mist removal device in the prior art to different particle size mist drops is big, especially lacks the efficient capture mechanism for large particle mist drops, leads to the terminal emission mist drop concentration under part working condition to be difficult to satisfy the environmental protection requirement is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of mist-containing waste gas treatment equipment, specifically to a vertical rotary water film demisting device. Background Technology

[0002] In many areas of industrial production, such as flue gas purification, waste gas treatment, chemical production, and energy conversion, the removal of mist droplets is a crucial step in ensuring emissions meet standards and equipment operates normally. Mist droplets have a wide size distribution, and their size composition varies significantly under different operating conditions. Existing demisters exhibit significantly different effectiveness in handling mist droplets of different sizes.

[0003] Currently, common demisting technologies include inertial impaction, centrifugal separation, wire mesh filtration, and wet scrubbing. While these technologies can remove droplets to some extent, they are still significantly insufficient for the efficient capture of large droplets. For example, inertial impaction and centrifugal separation rely primarily on the inertial force of droplets to collide with the separation element and be captured. However, for larger droplets in high-speed airflow, although their inertial force is significant, the structural design of existing devices often fails to fully utilize this characteristic, resulting in large droplets not being effectively intercepted and easily penetrating the demisting device. Wire mesh filtration technology has a better capture effect on small-diameter droplets, but when large droplets collide with the mesh, they easily form a liquid film on the mesh surface and rapidly accumulate, causing mesh blockage and affecting the operating efficiency and lifespan of the device. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a vertical rotary water film demister for removing mist droplets from airflow, comprising:

[0005] The demister tube has a spiral guide plate inside, forming a spiral rising passage between the spiral guide plate and the inner wall of the demister tube. The lower and upper ends of the spiral rising passage are respectively provided with an airflow inlet and an airflow outlet. The inner wall at the airflow outlet is provided with a diameter-reducing baffle ring. The demister tube is configured such that after the airflow flows into the spiral rising passage through the airflow inlet, the mist droplets in the airflow can be thrown towards the inner wall of the demister tube and flow upward along the inner wall of the demister tube. The diameter-reducing baffle ring is used to block the mist droplets.

[0006] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein a plurality of convex ridges extending axially along the inner wall of the demisting tube are arranged circumferentially, and a water guiding gap is formed between two adjacent convex ridges. The spiral guide plate blocks the water guiding gap. The convex ridges are used to block the mist droplets in the spirally rising airflow and guide the mist droplets vertically through the water guiding gap. The spiral guide plate is used to block the upward-moving mist droplets.

[0007] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein the demisting tube body is a split structure, consisting of several split tubes connected end to end, one end of one of the split tubes is provided with a reduced diameter baffle ring, and this section is configured as an airflow outlet; each of the split tubes is provided with a split guide plate, and several split guide plates are connected end to end to form the spiral guide plate.

[0008] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein each of the split tubes is provided with an axially mounted mandrel inside, and the inner and outer ends of the split guide plate are respectively disposed on the inner wall of the split tube and the mounting mandrel.

[0009] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein each of the mounting mandrels has a first protrusion and a first groove at its upper and lower ends, and the first protrusion and the first groove of two adjacent mounting mandrels are fitted together.

[0010] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein the outer walls at both ends of each of the split tubes have outwardly extending mounting skirts, and each mounting skirt has bolt mounting holes arranged circumferentially at equal intervals.

[0011] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein each of the split tubes has a plurality of positioning grooves and a plurality of positioning protrusions respectively provided on the two mounting skirts along the circumferential direction, and the split tubes are configured such that after two split tubes are installed together, the positioning protrusions and the positioning grooves are embedded and engaged.

[0012] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein a spiral liquid guiding groove is provided on the top surface of the spiral guide plate, and the spiral liquid guiding groove extends along the direction of the spiral guide plate to guide the condensed mist droplets away from the airflow outlet.

[0013] For example, at least one embodiment of this disclosure provides a vertical vortex water film demisting device, wherein the inner wall of the reduced diameter baffle ring is provided with a plurality of convex baffles, and the positions of the convex baffles and the convex ridges correspond one-to-one.

[0014] For example, at least one embodiment of this disclosure provides a vertical rotary water film demisting device, wherein the mounting skirt is polygonal and the bolt mounting holes are installed at the corners of the mounting skirt.

[0015] The beneficial effects of the embodiments of this utility model are as follows:

[0016] In this invention, the spiral ascending path formed by the spiral guide plate and the inner wall of the demister tube creates a stable rotating flow field. Droplets move towards the tube wall under centrifugal force, achieving initial separation of droplets of different sizes. Larger droplets, due to their greater mass and significant centrifugal force, preferentially impact the tube wall, solving the problem of the lack of a dedicated capture mechanism for large particles in existing technologies. The reduced-diameter baffle ring at the air outlet changes the cross-sectional area of ​​the flow channel by narrowing its inner diameter, causing droplets near the outlet to impact the inner edge of the baffle ring under inertia, forming a double interception structure with the water film on the tube wall. This compensates for the insufficient capture of droplets in the edge flow field by simple centrifugal separation. The spiral ascending path guides the droplets upwards along the tube wall, extending the adhesion path of the droplets on the wall surface, increasing the secondary capture opportunity of small-diameter droplets by the liquid film, and simultaneously preventing flow channel blockage caused by the rapid aggregation of large droplets. The reduced diameter baffle ring works in conjunction with the spiral guide plate. Centrifugal force provides the driving force for the radial movement of droplets, the water film on the pipe wall achieves initial interception, and the reduced diameter structure performs secondary capture of escaped droplets. The synergistic effect of the three enables the device to effectively reduce the concentration of terminal emission droplets under different operating conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a vertical rotary water film demisting device in one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the split tube structure in the embodiment;

[0020] Figure 3 for Figure 2 A partially enlarged structural diagram of section A in the middle;

[0021] Figure 4 for Figure 2 Another perspective structural diagram;

[0022] Figure 5 for Figure 1 A schematic diagram of the split guide plate structure in the embodiment.

[0023] In the diagram: Demisting pipe body - 100, spiral rising passage - 101, airflow inlet - 102, airflow outlet - 103, split pipe - 110, spiral guide plate - 200, spiral liquid guiding groove - 201, split guide plate - 210, reduced diameter retaining ring - 3, convex retaining edge - 301, convex ridge - 4, water guiding gap - 401, mounting mandrel - 5, first convex part - 501, first groove part - 502, mounting skirt - 6, bolt mounting hole - 601, positioning groove - 602, positioning protrusion - 603. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0025] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 utility model.

[0029] 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.

[0030] like Figures 1-5 The diagram illustrates a vertical vortex water film demister according to an embodiment of the present invention. The demister includes a vertically arranged demister tube 100, inside which a spiral guide plate 200 is coaxially fixed. The outer edge of the spiral guide plate 200 and the inner wall of the demister tube 100 form a spiral ascending passage 101. An airflow inlet 102 is located on the lower side wall of the demister tube 100, and an airflow outlet 103 is located on the inner wall of the top of the demister tube 100. The inner wall of the airflow outlet 103 extends towards the center of the tube to form a reduced-diameter baffle ring 3. The inner diameter of the reduced-diameter baffle ring 3 is smaller than the flow diameter at the top of the spiral ascending passage 101. After the airflow containing mist droplets enters through the airflow inlet 102, it is guided by the spiral guide plate 200 to move spirally upward along the spiral ascending passage 101. Under the action of centrifugal force, the mist droplets obtain a radial component force towards the inner wall of the demister 100. After impacting the pipe wall, they form a water film flowing upward along the pipe wall. When the airflow reaches the top of the spiral ascending passage 101, it is blocked by the narrowing baffle ring 3. The mist droplets that are not captured by the pipe wall impact the inner edge of the baffle ring due to inertia. Then, they flow downward along the inner wall of the baffle ring and merge into the water film on the pipe wall. Finally, they are discharged from the liquid collection port at the bottom of the demister 100. The clean airflow is discharged from the device through the outlet channel inside the narrowing baffle ring 3.

[0031] The spiral ascending passage 101 formed by the spiral guide plate 200 and the inner wall of the demister 100 creates a stable rotating flow field. Droplets move towards the pipe wall under centrifugal force, achieving initial separation of droplets of different sizes. Larger droplets, due to their larger mass and greater centrifugal force, preferentially impact the pipe wall, solving the problem of the lack of a dedicated capture mechanism for large particles in existing technologies. The reduced-diameter baffle ring 3 at the airflow outlet 103 changes the cross-sectional area of ​​the flow channel by narrowing its inner diameter, causing droplets near the outlet to impact the inner edge of the baffle ring under inertia, forming a double interception structure with the water film on the pipe wall. This compensates for the insufficient capture of droplets in the edge flow field by simple centrifugal separation. The spiral ascending passage 101 guides the droplets upwards along the pipe wall, extending the adhesion path of the droplets on the wall surface, increasing the secondary capture opportunity of small-diameter droplets by the liquid film, and simultaneously preventing flow channel blockage caused by the rapid aggregation of large droplets. The reduced diameter baffle ring 3 works in conjunction with the spiral guide plate 200. Centrifugal force provides the driving force for the radial movement of droplets, the water film on the pipe wall achieves initial interception, and the reduced diameter structure performs secondary capture of escaped droplets. The synergistic effect of the three enables the device to effectively reduce the concentration of terminal emission droplets under different operating conditions, especially improving the removal efficiency of large droplets and meeting stringent environmental protection requirements. At the same time, the optimized flow channel structure reduces moving parts, lowers equipment maintenance costs, and improves operational stability.

[0032] In some examples, the inner wall of the demister 100 has several convex ridges 4 evenly arranged along the circumference, each convex ridge 4 extending axially along the demister 100, forming a water-guiding gap 401 between adjacent convex ridges 4. A spiral guide plate 200 is fixed inside the demister 100, its edge connected to the side of the convex ridge 4, circumferentially separating the water-guiding gap 401. When the airflow containing mist droplets flows spirally along the spiral ascending passage 101, large mist droplets impact the convex ridge 4 due to inertia. After being blocked tangentially by the convex ridge 4, they flow downwards along the water-guiding gap 401 under the thrust of the airflow and gravity. The plate structure of the spiral guide plate 200 prevents the mist droplets from migrating upwards with the airflow, causing the droplets to converge into the liquid collection area at the bottom of the pipe along the surface of the convex ridge 4 and the water-guiding gap 401.

[0033] The combination of the convex ridge 4 and the water-guiding gap 401 forms a three-dimensional interception structure along the circumference of the pipe body. The convex ridge 4 generates a tangential blocking force on the high-speed flowing droplets, forcibly changing the trajectory of large droplets, causing them to deviate from the mainstream airflow and converge in the water-guiding gap 401. The water-guiding gap 401 provides a vertical flow channel for the droplets, preventing flow channel blockage caused by disordered agglomeration of droplets on the pipe wall surface. The spiral guide plate 200 blocks the water-guiding gap 401, preventing droplets from escaping along the spiral direction. Together with the convex ridge 4, it forms a composite separation mechanism of tangential interception, vertical guidance, and spiral blocking, significantly improving the capture efficiency of large droplets. At the same time, the gap structure optimizes the liquid-gas separation path and reduces airflow resistance.

[0034] In some examples, the demisting tube 100 has a split structure, consisting of multiple split tubes 110 connected end-to-end along the axial direction. One end of the top split tube 110 has a reduced-diameter baffle 3 on its inner wall, forming an airflow outlet 103. Each split tube 110 has a fixed split guide plate 210 inside, and the helical angle of each guide plate 210 is continuously matched with that of the adjacent guide plates 210, forming a complete helical guide plate 200 when connected end-to-end. The airflow enters from the airflow inlet 102 of the bottom split tube 110, is guided sequentially by the split guide plates 210 within each split tube 110, rises along a continuous helical trajectory at the connection point of the split tubes 110, and finally exits through the reduced-diameter baffle 3 of the top split tube 110.

[0035] The split-type structural design allows the demister tube 100 to be flexibly combined according to the installation space and processing air volume. The split guide plates 210 inside each split tube 110 are independently processed and then spliced ​​to form a complete spiral guide plate 200, reducing the processing difficulty and transportation cost of large equipment. The top split tube 110 integrates a reduced-diameter baffle ring 3, realizing a modular design of separation function and structural support, which facilitates positioning and debugging during equipment installation. The continuous spiral structure of the split guide plate 210 ensures that the airflow maintains a stable rotating flow field at the tube connection, avoiding flow field turbulence caused by structural segmentation, improving the overall demisting efficiency. At the same time, the split design provides convenience for equipment maintenance, allowing faulty sections to be disassembled for repair, reducing downtime.

[0036] In some examples, each split tube 110 has a mounting mandrel 5 arranged coaxially with the split tube 110. The split guide plate 210 is spiral-shaped, with its inner edge fixed to the outer surface of the mounting mandrel 5 and its outer edge fixed to the inner wall of the split tube 110, forming a spiral ascending passage 101 defined by the mounting mandrel 5, the split guide plate 210, and the inner wall of the split tube 110. When the airflow flows inside the split tube 110, it is guided by the split guide plate 210 to move spirally around the mounting mandrel 5, and the droplets migrate towards the inner wall of the split tube 110 under the action of centrifugal force.

[0037] The mounting mandrel 5 serves as the inner support structure of the split guide plate 210, enhancing the structural rigidity of the guide plate and preventing deformation under high-speed airflow that could lead to abnormal flow field. Both ends of the split guide plate 210 are fixed to the mounting mandrel 5 and the inner wall of the split tube 110, respectively, forming a stable spiral flow channel and ensuring the uniformity of airflow rotation. The mounting mandrel 5 provides a central support point inside the split tube 110, balancing the radial load of the airflow on the guide plate, extending the equipment's service life, and facilitating the positioning and installation of the split guide plate 210, ensuring consistent spiral parameters for each segment of the guide plate, and maintaining the stability of the overall flow field.

[0038] In some examples, each mounting mandrel 5 has an outwardly protruding first protrusion 501 on its upper end face and a first groove 502 on its lower end face that matches the first protrusion 501. When two adjacent mounting mandrels 5 are connected, the first protrusion 501 of the upper mounting mandrel 5 is inserted into the first groove 502 of the lower mounting mandrel 5, forming an axial positioning fit. The mounting mandrels 5 achieve coaxial docking at the connection of the split tubes 110 through this embedding structure, ensuring that the spiral trajectory of the split guide plate 210 is continuous when axially spliced.

[0039] The interlocking of the first protrusion 501 and the first groove 502 provides precise axial positioning and circumferential limiting for the mounting mandrel 5, preventing offset or rotational misalignment of the mounting mandrel 5 within adjacent split tubes 110. This ensures that the split guide plates 210 form a smooth and continuous spiral surface after splicing, maintaining the consistency of the airflow spiral motion. This structure requires no additional positioning components, achieving connection and positioning through the mandrel's own structure, simplifying the assembly process, enhancing the overall integrity of the mandrel connection, reducing airflow disturbance at the tube connection, and improving the operational stability of the demisting device.

[0040] In some examples, the outer walls at both ends of each split tube 110 extend outward to form annular mounting skirts 6. Multiple bolt mounting holes 601 are circumferentially distributed at equal intervals on the end face of the mounting skirts 6. Adjacent split tubes 110 are fitted together via the mounting skirts 6, and bolts pass through the bolt mounting holes 601 to secure them together, forming a sealed demisting tube body 100. The thickness of the mounting skirts 6 matches the wall thickness of the split tubes 110, and the diameter of the bolt mounting holes 601 matches the bolt specifications, ensuring connection strength and sealing performance.

[0041] The mounting skirt 6 and bolt mounting holes 601 provide a reliable mechanical connection and sealing structure for the split tube 110. The circumferentially evenly distributed bolt holes ensure uniform load distribution, preventing structural deformation caused by localized stress concentration. This connection method facilitates the rapid disassembly and assembly of the split tube 110, meeting the configuration requirements of equipment with different heights and processing capacities. Simultaneously, the sealing design prevents airflow leakage, ensuring the demisting process takes place within a closed flow channel, thus improving the operational reliability and efficiency of the device.

[0042] In some examples, each split tube 110 has multiple positioning protrusions 603 circumferentially arranged on one end of its mounting skirt 6, and corresponding positioning grooves 602 arranged on the other end of its mounting skirt 6. The number, shape, and circumferential spacing of the positioning protrusions 603 and the positioning grooves 602 are consistent. When two split tubes 110 are connected, the positioning protrusions 603 are embedded in the positioning grooves 602 to achieve circumferential positioning of the split tubes 110 and ensure that the spiral directions of adjacent split guide plates 210 are consistent.

[0043] The mating structure of the positioning protrusion 603 and the positioning groove 602 provides a circumferential positioning reference for the split tube 110, avoiding flow field disturbances caused by guide plate angle deviations during installation, and ensuring that the spiral guide plate 200 forms a continuous and abrupt spiral flow channel after axial splicing. This structure achieves precise alignment without additional measuring tools, simplifies the installation process, enhances the stability of the split tube 110 connection, prevents circumferential displacement caused by vibration during operation, ensures stable spiral ascent of the airflow along the designed trajectory within the tube, and improves the consistency of the demisting effect.

[0044] In some examples, a spiral liquid guiding groove 201 is formed on the top surface of the spiral guide plate 200. The direction of the liquid guiding groove 201 is consistent with the spiral trajectory of the spiral guide plate 200, and the depth of the groove gradually decreases in the direction away from the airflow outlet 103. When droplets condense on the surface of the spiral guide plate 200 to form a liquid film, the liquid film flows along the spiral liquid guiding groove 201 towards the bottom of the demister 100 under the action of gravity and airflow thrust, preventing the liquid film from migrating towards the outlet direction with the airflow.

[0045] The spiral liquid guide channel 201 provides a directional flow channel for the condensate on the surface of the guide plate, guiding the liquid film along the spiral trajectory to converge at the bottom of the tube, preventing droplets from accumulating on the guide plate surface and being re-entrained by the airflow to form secondary droplets. This structure works in conjunction with the centrifugal separation effect of the spiral ascending passage 101, allowing the condensate to escape from the mainstream airflow through the liquid guide channel 201, reducing interphase interference in the liquid-gas two-phase flow and improving droplet capture efficiency. The spiral direction of the liquid guide channel 201 is consistent with that of the guide plate, ensuring that the liquid film flow direction matches the airflow rotation direction, reducing flow resistance, and avoiding the risk of channel blockage caused by disordered liquid film flow on the guide plate surface.

[0046] In some examples, the inner wall of the reduced-diameter baffle ring 3 is provided with multiple convex baffles 301. The position of each convex baffle 301 corresponds one-to-one with the convex ridge 4 on the inner wall of the demister tube 100, and the radial extension length of the convex baffle 301 is greater than the radial height of the convex ridge 4. When the airflow carries droplets that are not captured by the tube wall through the reduced-diameter baffle ring 3, the droplets impact the convex baffles 301 due to the inertial force generated by the contraction of the flow channel, flow downward along the surface of the convex baffles 301, and merge with the liquid flow guided by the convex ridge 4 at the bottom of the tube.

[0047] The convex baffle 301 and the convex ridge 4 are positioned correspondingly to form a gradient interception structure from the middle of the tube to the outlet. The convex baffle 301 performs secondary interception of escaping droplets in the narrowing region, compensating for the blind spot of the convex ridge 4 at the outlet. The radial extension design of the convex baffle 301 enhances the capture capability of droplets in the edge flow field, allowing droplets to flow into the liquid film along a preset path after impacting the baffle, forming a vertically continuous liquid flow channel with the water-guiding gap 401 of the convex ridge 4, ensuring the continuity of the droplet capture process. This synergistic structure effectively reduces droplet escape at the outlet, especially providing dual interception for medium-sized droplets (50-100μm), improving the overall demisting efficiency of the device.

[0048] In some examples, the mounting skirt 6 is a polygonal structure with bolt mounting holes 601 at its corners. The number of bolt mounting holes 601 is the same as the number of sides of the polygon. Adjacent split tubes 110 are fixedly connected through the corner bolt holes 601 of the mounting skirt 6. The force direction of the bolts is distributed along the vertices of the polygon, ensuring that the connection load is evenly transmitted to the body of the split tube 110.

[0049] The design of the polygonal mounting skirt 6 and corner bolt holes 601 enhances the torsional stiffness of the connection structure, avoids circumferential slippage that may occur with the circular skirt, and allows the bolt load to be transferred to the pipe body through the vertices, reducing stress concentration at the skirt edges. This structure facilitates rapid positioning during installation, ensuring circumferential alignment of the split pipe 110 through the geometric symmetry of the polygon. Simultaneously, the arrangement of the corner bolt holes 601 simplifies the assembly process, improves installation efficiency, and guarantees the coaxiality and sealing of the split pipe 110 after connection, meeting the requirements for use under high-pressure conditions.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vertical rotary vane water film demister for removing mist droplets from a gas stream, characterized by, include: The demisting tube (100) is provided with a spiral guide plate (200) inside. A spiral rising passage (101) is formed between the spiral guide plate (200) and the inner wall of the demisting tube (100). An airflow inlet (102) and an airflow outlet (103) are respectively opened at the lower end and the upper end of the spiral rising passage (101). A diameter reduction baffle (3) is provided on the inner wall of the airflow outlet (103). The demisting tube (100) is configured such that after the airflow flows into the spiral rising passage (101) through the airflow inlet (102) and rises, the mist droplets in the airflow can be thrown towards the inner wall of the demisting tube (100) and flow upward along the inner wall of the demisting tube (100). The diameter reduction baffle (3) is used to block the mist droplets.

2. A vertical rotary vane water film demisting device according to claim 1, characterized in that, The inner wall of the demister tube (100) is circumferentially arranged with several protruding ribs (4) extending along the axial direction of the demister tube (100). A water guiding gap (401) is formed between two adjacent protruding ribs (4). The spiral guide plate (200) blocks the water guiding gap (401). The protruding ribs (4) are used to block the mist droplets in the spirally rising airflow and guide the mist droplets vertically through the water guiding gap (401). The spiral guide plate (200) is used to block the upward-moving mist droplets.

3. A vertical rotary vane water film demisting device according to claim 1, characterized in that, The demisting tube body (100) is a split structure, consisting of several split tubes (110) connected end to end. One end of one of the split tubes (110) is provided with a reduced diameter baffle (3), and this section is configured as an airflow outlet (103). Each split tube (110) is provided with a split guide plate (210), and several split guide plates (210) are connected end to end to form the spiral guide plate (200).

4. A vertical rotary vane water film demisting device according to claim 3, characterized in that, Each of the split tubes (110) is provided with an axially mounted mandrel (5) inside, and the inner and outer ends of the split guide plate (210) are respectively located on the inner wall of the split tube (110) and the mounting mandrel (5).

5. A vertical rotary vane water film demister according to claim 4, wherein Each of the mounting mandrels (5) has a first protrusion (501) and a first groove (502) at its upper and lower ends respectively, and the first protrusion (501) and the first groove (502) of two adjacent mounting mandrels (5) are fitted together.

6. A vertical rotary water film demisting device according to claim 3, characterized in that, Each of the two ends of the split tube (110) has an outer wall with an outwardly extending mounting skirt (6), and each mounting skirt (6) has bolt mounting holes (601) arranged circumferentially at equal intervals.

7. A vertical rotary water film demisting device according to claim 3, characterized in that, Each of the two mounting skirts (6) of the split tube (110) is provided with a plurality of positioning grooves (602) and a plurality of positioning protrusions (603) in the circumferential direction. The split tube (110) is configured such that after the two split tubes (110) are installed together, the positioning protrusions (603) and the positioning grooves (602) are embedded and engaged.

8. A vertical rotary water film demisting device according to claim 1, characterized in that, The top surface of the spiral guide plate (200) is provided with a spiral liquid guiding groove (201), which extends along the direction of the spiral guide plate (200) and is used to guide the condensed droplets away from the airflow outlet (103).

9. A vertical rotary water film demisting device according to claim 1, characterized in that, The inner wall of the reduced diameter retaining ring (3) is provided with several convex retaining edges (301), and the positions of the convex retaining edges (301) and the convex ridges (4) correspond one-to-one.

10. A vertical rotary water film demisting device according to claim 6, characterized in that, The mounting skirt (6) is polygonal, and the bolt mounting holes (601) are installed at the corners of the mounting skirt (6).

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