A foam elimination device for desulfurization towers

Abstract

This utility model relates to the field of chemical equipment technology, specifically a foam elimination device for a desulfurization tower. It includes a casing, and further includes: openings at both the top and bottom of the casing; a defoaming spray mechanism installed inside the casing; and a compression defoaming mechanism connected to the casing. The compression defoaming mechanism includes a drive motor connected to a grooved wheel, which has multiple sets of grooves. A set of pressure plates is slidably installed in each groove, and the pressure plates are connected to a linkage shaft. The casing is connected to an outer frame and a guide center block. This utility model uses the cooperation of the defoaming spray mechanism and the compression defoaming mechanism to compress and break excessive foam, thereby continuously performing defoaming operations. Simultaneously, the spraying of chemicals further enhances the foam elimination effect. Furthermore, the casing of this utility model has a hollow internal structure, providing space for the desulfurized flue gas to pass through, facilitating the assembly and cooperation of this utility model with the desulfurization tower.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to a foam elimination device for desulfurization towers. Background Technology

[0002] In wet flue gas desulfurization systems, desulfurization towers mainly rely on lime water to absorb carbon dioxide and sulfur dioxide from the flue gas. However, after absorbing sulfur dioxide, lime water produces sulfurous acid, which reacts with sulfur dioxide. During the reaction, some systems are prone to forming a foam layer on the liquid surface due to water quality issues. The foam can affect the accurate judgment of the liquid level in the equipment, so foam removal operations are required.

[0003] However, since the desulfurization tower must ensure the flow of flue gas, it can generally only use a wire mesh structure to filter out foam. Although this passive foam elimination structure can ensure the smooth flow of flue gas in the desulfurization tower, it is also limited by the wire mesh structure, resulting in a limited actual foam elimination effect. Existing devices cannot achieve active and continuous defoaming operations.

[0004] The prior art, disclosed in CN116459561A, describes a rotary automatic extrusion defoaming machine. This machine consists of a top plate, an extrusion plate, a baffle, and a surrounding plate, forming a box structure with one side open. The inner side of the surrounding plate has a sliding groove, and the extrusion plate is slidably connected to the surrounding plate through the sliding groove. The extrusion plate is activated by a motor on the rotary box to perform extrusion defoaming. This defoaming method is simple, has low defoaming efficiency, complex structure, high energy consumption, and high maintenance costs. Summary of the Invention

[0005] The purpose of this utility model is to provide a foam elimination device for desulfurization towers, so as to solve the problems mentioned in the background art, such as single defoaming method, low defoaming efficiency, complex structure, high energy consumption, and high maintenance cost.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A desulfurization tower foam elimination device includes a cover with openings at both the top and bottom, the openings being interconnected through cavities. A compression defoaming mechanism is fixedly connected inside the cover. The compression defoaming mechanism includes a set of symmetrical drive motors fixedly connected to the upper end of the cover. The output shaft of the drive motor is fixedly connected to a grooved wheel. The upper surface of the grooved wheel is provided with a groove, and the groove is slidably connected to a foam-pressing plate. The foam-pressing plate is fixedly connected to a linkage shaft.

[0008] The cover is fixedly connected to two sets of symmetrically arranged outer frames. Each set of outer frames has a guide center block on its inner side. The guide center block is fixedly connected to the cover. A guide groove is provided between the guide center block and the outer frame. The guide groove is slidably connected to the linkage shaft.

[0009] The guide groove is provided with a set of symmetrically distributed displacement grooves, inner converging grooves and outer expanding grooves along the circumference of the groove. One end of the displacement grooves is fixedly connected to the inner converging groove, and the other end of the displacement grooves is fixedly connected to the outer expanding groove. The radius of curvature of the inner converging groove is smaller than the radius of the groove wheel.

[0010] In a further preferred embodiment, the trajectory center of the guide groove is offset from the center of the grooved wheel, and the linkage shaft moves in an offset manner along the motion track of the guide groove.

[0011] More preferably, the radius of curvature of the inner concave groove on the guide groove is smaller than the radius of curvature of the displacement groove, and the radius of curvature of the displacement groove is smaller than the radius of curvature of the outer expansion groove.

[0012] Further preferably, the housing also includes a spray defoaming mechanism, which includes an arc-shaped nozzle, a conduit, and a control valve. The arc-shaped nozzle is fixedly connected to the opening at the upper end of the housing, one end of the conduit is movably connected to the arc-shaped nozzle, and the other end of the conduit is fixedly connected to the control valve.

[0013] More preferably, the inner wall of the cover is provided with an arc-shaped heating plate, and the arc-shaped heating plate is slidably connected to the foam pressing plate.

[0014] More preferably, the cover is provided with a reflux hole, which is located at the bottom of the extrusion space formed by the arc-shaped heating plate, the pressure plate, the cover and the groove wheel.

[0015] More preferably, the groove is arranged at equal angles along the circumference with the axis of the grooved wheel as the center.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] During operation, the casing is assembled with the desulfurization tower, positioning it above the slurry. Foam enters the casing through the lower opening, while the upper opening facilitates the discharge of desulfurized flue gas. Two drive motors rotate the grooved wheels, which in turn rotate the foam-pressing plates via grooves. During this process, the foam between the foam-pressing plates moves along with the rotating plates. Simultaneously, the foam-pressing plates drive the linkage shaft to slide along the guide groove. When the linkage shaft is in the outer expansion section of the guide groove, the foam-pressing plates on the two sets of extrusion defoaming mechanisms scrape the foam on the surface of the desulfurization tower liquid towards both sides of the casing. The foam continues to move as the foam-pressing plates rotate. When the linkage shaft rotates to the inner converging section of the guide groove, the foam pressing plate slides inward along the groove to the inner end of the groove. At this time, the foam pressing plate also rotates to the left and right sides of the cover. The space becomes smaller, forming a squeezing space that causes the foam to break. The top and bottom of this squeezing space are the cover, the front end is an arc-shaped heating plate, the rear end is a grooved wheel, and the left and right sides are foam pressing plates. The return hole at the bottom of the cover of this squeezing space can recover the foam liquid. In order to achieve the best effect of scraping away the foam on the liquid surface, when the foam pressing plates of the two sets of squeezing defoaming mechanisms move to the outer expanding section, the two sets of foam pressing plates will be tangent in the middle position.

[0018] Simultaneously, under the operation of the arc-shaped heating plate, the temperature of the foam rises, causing it to expand more rapidly, thereby accelerating the foam breakage rate and improving defoaming efficiency. To further improve defoaming efficiency, the control valve can be opened to activate the spray defoaming mechanism, and different spray liquids can be selected to accelerate foam breakage as needed.

[0019] To facilitate uniform and continuous foam movement, grooves can be set at equal angles along the circumference, thereby enabling continuous and uniform defoaming operations. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the motor according to the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the reflux hole of this utility model.

[0022] Figure 3 This is a three-dimensional structural diagram of the internal structure of the present invention from the perspective of the grooved wheel.

[0023] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the guide groove of this utility model.

[0024] In the diagram: 1. Cover; 2. Spray defoaming mechanism; 3. Extrusion defoaming mechanism; 4. Drive motor; 5. Arc-shaped heating plate; 6. Grooved wheel; 7. Groove; 8. Defoaming plate; 9. Linkage shaft; 10. Outer frame; 11. Guide center block; 12. Guide groove; 13. Arc-shaped nozzle; 14. Conduit; 15. Return hole; 16. Control valve; 17. Displacement groove; 18. Inner converging groove; 19. Outer expanding groove. Detailed Implementation

[0025] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments of the present invention.

[0026] Example 1, see Figures 1-4 As shown in this embodiment, a desulfurization tower foam elimination device includes a cover 1 with openings at both the top and bottom. These openings are interconnected through a cavity in the middle. The upper opening facilitates the discharge of desulfurized flue gas. A compression defoaming mechanism 3 is fixedly connected inside the cover 1. The compression defoaming mechanism 3 includes a set of symmetrical drive motors 4 fixedly connected to the upper end of the cover 1. A grooved wheel 6 is fixedly connected to the output shaft of each drive motor 4. A groove 7 is provided on the upper surface of the grooved wheel 6, and the groove 7 is slidably connected to a foam-pressing plate 8, thereby limiting the movement trajectory of the foam-pressing plate 8. Two sets of symmetrically arranged outer frames 10 are fixedly connected to the cover 1. Each set of outer frames 10 has a guide center block 11 on its inner side. The guide center block 11 is fixedly connected to the cover 1, and the gap between the guide center block 11 and the outer frame 10 forms a guide groove 12, which limits the trajectory of the guide groove 12. The guide groove 12 is slidably connected to a linkage shaft 9.

[0027] The guide groove 12 is provided with a set of symmetrically distributed displacement grooves 17, inward converging grooves 18 and outward expanding grooves 19 along the circumference. One end of the displacement grooves 17 is fixedly connected to the inward converging groove 18, and the other end of the displacement grooves 17 is fixedly connected to the outward expanding groove 19. The radius of curvature of the inward converging groove 18 is smaller than the radius of the groove wheel 6. Since the bubble pressing plate 8 is fixedly connected to the linkage shaft 9, the linkage shaft 9 can simultaneously drive the bubble pressing plate 8 to move up and down in the groove 7 when it moves. When the linkage shaft 9 moves to a section of the inward converging groove 18, the radius of curvature of the inward converging groove 18 is smaller than the radius of the groove wheel 6. The linkage shaft 9 drives the bubble pressing plate 8 to move towards the bottom of the groove 7 to realize the function of inward converging and bubble pressing.

[0028] When the movement reaches the inner converging groove 18, the trajectory center of the guide groove 12 is misaligned with the center of the grooved wheel 6. At this time, the radius of curvature of the inner converging groove 18 is smaller than the radius of the grooved wheel 6. The linkage shaft 9 moves in a misaligned manner along the movement track of the guide groove 12, realizing the inward retraction of the foam-pressing plate 8 to squeeze and break the foam in the space. When the linkage shaft 9 moves from the inner converging groove 18 to the outer expanding groove 19, it drives the foam-pressing plate to retract inward and expand outward, thereby realizing continuous foam scraping and pressing. In order to achieve the best effect of scraping away foam on the liquid surface, when the foam-pressing plates of the two sets of squeezing and defoaming mechanisms move to the outer expanding groove section, the two sets of foam-pressing plates will be tangent at the middle position.

[0029] The housing 1 also includes a spray defoaming mechanism 2, which includes an arc-shaped nozzle 13, a conduit 14, and a control valve 16. The arc-shaped nozzle 13 is fixedly connected to the opening at the upper end of the housing 1. One end of the conduit 14 is movably connected to the arc-shaped nozzle 13, and the other end of the conduit 14 is fixedly connected to the control valve 16. The spray defoaming mechanism 2 works in conjunction with the foam spraying mechanism to spray different solvents onto the foam for further defoaming. The control valve 16 is used to control the start and stop of the spraying mechanism, and can work simultaneously with or independently of the extrusion defoaming mechanism 3, depending on the operational requirements.

[0030] The inner wall of the casing 1 is provided with an arc-shaped heating plate 5, which is slidably connected to the foam pressing plate 8. The arc-shaped heating plate 5 can raise the temperature of the foam, accelerate the expansion of the foam, thereby accelerating the foam breakage rate and improving the defoaming efficiency. When the linkage shaft 9 rotates to the inner groove 18 section of the guide groove 12, the foam pressing plate 8 slides inward along the groove 7 to the inner end of the groove 7. At this time, the foam pressing plate 8 also rotates to the left and right sides of the casing 1. The space becomes smaller, forming a squeezing space that causes the foam to break. The top and bottom of this squeezing space are the casing 1, the front end is the arc-shaped heating plate 5, the rear end is the groove wheel 6, and the left and right sides are the foam pressing plates 8. The return hole 15 at the bottom of the casing of this squeezing space can recover the foam liquid. In order to facilitate uniform and continuous movement of the foam, the groove 7 can be set at equal angles along the circumference to achieve continuous and uniform defoaming operation.

[0031] Example 2, see Figures 1-4As shown, in this embodiment, during use, the casing 1 is assembled with the desulfurization tower, so that the casing 1 is above the slurry, and the foam enters the casing 1 through the opening at the lower end of the casing 1. Two sets of drive motors 4 drive the grooved wheel 6 to rotate. The rotating grooved wheel 6 drives the foam pressing plate 8 to rotate through the groove 7. During this process, the foam located between the foam pressing plates 8 moves together with the rotating foam pressing plates 8. At the same time, the foam pressing plate 8 drives the linkage shaft 9 to slide along the guide groove 12. The guide groove 12 includes two sets of displacement grooves 17. The two sets of displacement grooves 17 are connected to a set of inward grooves 18. The two sets of displacement grooves 17 are connected to an outward expansion groove 19. The displacement groove 17, the outward expansion groove 19, and the inward contraction groove 18 are arranged circumferentially along the guide groove 12. The outward expansion groove 19 is connected to the inward contraction groove 18 through the displacement groove 17. Both sets of displacement grooves 17, outward expansion grooves 19, and inward contraction grooves 18 are set between the guide center block 11 and the outer frame 10. Both sets of displacement grooves 17, outward expansion grooves 19, and inward contraction grooves 18 are used to provide movement guidance for the moving linkage shaft 9. The radius of curvature of the outward expansion groove 19 is greater than the radius of curvature of the inward contraction groove 18. The minimum distance between the linkage shaft 9 in the outward expansion groove 19 and the axis of the grooved wheel 6 is greater than the minimum distance between the linkage shaft 9 in the inward contraction groove 18 and the axis of the grooved wheel 6. By setting the radius of curvature of the outer expansion groove 19 to be greater than that of the inner contraction groove 18, the minimum distance between the linkage shaft 9 and the axis of the groove wheel 6 is reduced during the process of the linkage shaft 9 moving from the outer expansion groove 19 to the inner contraction groove 18. At this time, the linkage shaft 9 drives the foam pressing plate 8 to move into the groove 7, so that the foam pressing plate 8 moves into the groove 7 during rotation, thereby reducing the size of the space between the foam pressing plate 8, the cover 1, and the groove wheel 6, thus compressing the foam.

[0032] To further improve defoaming efficiency, an arc-shaped nozzle 13 is fixedly connected to the upper opening of the housing 1 via the defoaming mechanism 2. The arc-shaped nozzle 13 is fixedly connected to a control valve 16 via a conduit 14, and the control valve 16 is connected to an external agent supply device. When the control valve 16 is opened, the arc-shaped nozzle 13 sprays out the defoaming agent guided by the conduit 14. Multiple sets of grooves 7 on the grooved wheel 6 are arranged at equal angles circumferentially around the axis of the grooved wheel 6. By arranging the grooves 7 at equal angles circumferentially, the foam can be moved evenly and continuously, thus facilitating continuous defoaming operations.

[0033] The fixed connection methods in this utility model include detachable threaded connections, pin connections, chain connections, spline connections, etc.; it also includes non-detachable connections such as welding, riveting, interference fit, etc., and movable connections can be hinges, bearings, and slide rails, etc., which can be selected and adapted according to different working scenario requirements.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A desulfurization tower foam elimination device, comprising a casing (1) with openings at both the upper and lower ends, the openings being interconnected through cavities, characterized in that, The cover (1) is fixedly connected to the extrusion defoaming mechanism (3). The extrusion defoaming mechanism (3) includes a set of symmetrical drive motors (4) fixedly connected to the upper end of the cover (1). The output shaft of the drive motor (4) is fixedly connected to a grooved wheel (6). The upper surface of the grooved wheel (6) is provided with a groove (7). The groove (7) is slidably connected to the defoaming plate (8). The defoaming plate (8) is fixedly connected to the linkage shaft (9). The cover (1) is fixedly connected to two sets of symmetrically arranged outer frames (10). Each set of outer frames (10) has a guide center block (11) on its inner side. The guide center block (11) is fixedly connected to the cover (1). A guide groove (12) is provided between the guide center block (11) and the outer frame (10). The guide groove (12) is slidably connected to the linkage shaft (9). The guide groove (12) is provided with a set of symmetrically distributed displacement grooves (17), inward grooves (18) and outward expansion grooves (19) along the circumference. One end of the displacement grooves (17) is fixedly connected to the inward grooves (18), and the other end of the displacement grooves (17) is fixedly connected to the outward expansion grooves (19). The radius of curvature of the inward grooves (18) is smaller than the radius of the groove wheel (6).

2. The desulfurization tower foam elimination device according to claim 1, characterized in that, The center of the guide groove (12) is offset from the center of the groove wheel (6), and the linkage shaft (9) moves along the motion track of the guide groove (12).

3. The desulfurization tower foam elimination device according to claim 1, characterized in that, The radius of curvature of the inner groove (18) on the guide groove (12) is smaller than the radius of curvature of the displacement groove (17), and the radius of curvature of the displacement groove (17) is smaller than the radius of curvature of the outer expansion groove (19).

4. The desulfurization tower foam elimination device according to claim 1, characterized in that, The housing (1) also includes a spray defoaming mechanism (2), which includes an arc-shaped nozzle (13), a conduit (14) and a control valve (16). The arc-shaped nozzle (13) is fixedly connected to the upper opening of the housing (1), one end of the conduit (14) is movably connected to the arc-shaped nozzle (13), and the other end of the conduit (14) is fixedly connected to the control valve (16).

5. A desulfurization tower foam elimination device according to claim 1, characterized in that, The inner wall of the cover (1) is provided with an arc-shaped heating plate (5), and the arc-shaped heating plate (5) is slidably connected to the pressure plate (8).

6. The desulfurization tower foam elimination device according to claim 1, characterized in that, The cover (1) is provided with a return hole (15), which is located at the bottom of the extrusion space formed by the arc heating plate (5), the pressure plate (8), the cover (1) and the groove wheel (6).

7. A desulfurization tower foam elimination device according to claim 1, characterized in that, The groove (7) is set at equal angles along the circumference with the axis of the grooved wheel (6) as the center.

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