Demisting module and demister

Abstract

A demisting module (10), which comprises a plurality of demisting blades (1) and a positioning component for positioning the demisting blades (1), each demisting blade (1) having a certain extension height in the extension height direction. Each demisting blade (1) comprises a blade main body (2) and one or more hook portions (3). The blade main bodies (2) are formed in a wavy shape along the direction in which flue gas enters, and a plurality of wave crests are formed. Each hook portion (3) is constructed to extend outward from a wave crest of a blade main body (2) away from the blade main body (2) to form, between the hook portion (3) and the blade main body (2), a pocket portion facing flue gas entering the demisting module (10). When viewed in a direction perpendicular to the extension height, the width at an opening (5) of the pocket portion is configured to be smaller than the width at the middle section (6) of the pocket portion. The described demisting module (10) can effectively remove mist droplets entrained in purified flue gas during a wet desulfurization process, having advantages of being simple in structure, high in strength, low in processing difficulty and manufacturing costs, easy to clean, and the like.

Description

Demisting modules and demisters Technical Field

[0001] The utility model relates to the field of environmental protection, and in particular to a demisting module and a demisting device which can be used for gas-liquid separation. Background Art

[0002] In wet flue gas desulfurization, a demister can be used to remove droplets entrained in the purified flue gas. The flue gas carrying droplets flows at a constant speed through the demister blades, rapidly and continuously redirecting its direction. Under the influence of centrifugal force and inertia, the droplets in the flue gas strike the demister blades and are captured. The droplets then converge to form a stream, which falls into the slurry tank under the influence of gravity, achieving gas-liquid separation. As a result, the flue gas passing through the demister can be discharged while meeting the demisting requirements.

[0003] In the prior art, there are demisters that use a double-bag vane structure to capture mist droplets. However, while the double-bag vane structure has a good capture effect on mist droplets, the vane structure is complex, difficult to manufacture and expensive, and scale accumulated in the vanes is difficult to wash away.

[0004] Utility Model Content

[0005] An object of the present invention is to provide a demisting module and a demisting device comprising the demisting module, so as to solve at least one of the shortcomings in the prior art.

[0006] To this end, the first aspect of the present invention relates to a defogger module, which includes a plurality of defogger blades and a positioning member for positioning the plurality of defogger blades, each of the defogger blades having a certain extension height in the extension height direction, each of the defogger blades including a blade body and one or more hooks, the blade body being wavy in the direction along the flue gas entry direction and forming a plurality of wave crests, each hook being configured to extend away from the blade body from the wave crest of the blade body to form a bag portion between the hook portion and the blade body facing the flue gas entering the defogger module, wherein, when viewed in a direction perpendicular to the extension height direction, the width at the opening of the bag portion is set to be smaller than the width at the middle section of the bag portion.

[0007] The demisting module according to the present invention can effectively remove the mist droplets entrained in the purified flue gas in the wet desulfurization process, and has the advantages of simple structure, high strength, low processing difficulty and manufacturing cost, and easy cleaning.

[0008] In some embodiments, when viewed in a direction perpendicular to the extension height, each hook portion extends from a corresponding wave crest in a direction tangential to the wave crest, or extends along a direction of a section adjacent to the wave crest.

[0009] In some embodiments, when viewed in a direction perpendicular to the extended height, the blade bodies of each demisting blade are arranged parallel to each other in a transverse direction perpendicular to the flue gas entry direction; and / or, each demisting blade has the same structure; and / or, the demisting blade includes at least one protrusion arranged on one side or the other side relative to all bag portions in the flue gas entry direction.

[0010] In some embodiments, when viewed in a direction perpendicular to the extended height, the blade bodies of each demisting blade are arranged parallel to each other in a transverse direction perpendicular to the flue gas entry direction, and each demisting blade has the same structure, wherein the spacing between each two demisting blades in the transverse direction is equal to each other.

[0011] In some embodiments, the hook portion is provided at each crest of the blade body of each demisting blade.

[0012] In some embodiments, when observed in a direction perpendicular to the extended height, the ratio of the spacing between adjacent wave peaks of the demisting blades along the flue gas entry direction to the spacing along a transverse direction perpendicular to the flue gas entry direction is between 1 and 3.

[0013] In some embodiments, when viewed in a direction perpendicular to the extended height, a ratio of a spacing between two adjacent demisting blades in a transverse direction perpendicular to the flue gas direction to a width of the opening of the bag portion is between 1.5 and 15.

[0014] In some embodiments, when viewed in a direction perpendicular to the extension height, the demisting blade satisfies one or more of the following conditions:

[0015] The spacing between adjacent wave crests of the demisting blades along the flue gas inlet direction is between 45 and 65 mm;

[0016] The spacing between adjacent wave crests of the demisting blades along a transverse direction perpendicular to the flue gas entry direction is between 25 and 45 mm;

[0017] The width of the opening of the bag is between 2 and 10 mm;

[0018] A distance between two adjacent demisting blades in the transverse direction is between 15 and 30 mm.

[0019] In some embodiments, the demisting module includes two side sealing plates, which are plate-shaped and provided with sockets in a plane perpendicular to the extension height of the demisting blades. The sockets correspond to the shapes of the multiple demisting blades in the plane, so that they can cooperate with each demisting blade to achieve the positioning of the demisting blades and the side sealing of the demisting module.

[0020] In some embodiments, the demisting blades are made by extruding polypropylene in a single pass.

[0021] A second aspect of the present invention relates to a demister, comprising the demister module as described above.

[0022] The various technical features mentioned above and the various technical features to be mentioned below as well as the technical features that can be derived from the drawings can be combined with each other in any manner, as long as the individual technical features to be combined with each other are not contradictory to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below with reference to the accompanying drawings using exemplary embodiments, but the present invention is not limited thereto.

[0024] FIG1 shows a schematic top view of a demisting module according to some embodiments of the present application.

[0025] FIG. 2 is a schematic top view of a demisting blade of the demisting module in FIG. 1 .

[0026] In the attached figure:

[0027] 1: Demisting blade; 2: Blade body; 3: Hook; 4: Pocket; 5: Opening; 6: Middle section; 7: Side sealing plate; 8: Smoke inlet; 9: Protrusion; 10: Demisting module; 11: Socket DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0029] Figure 1 shows a schematic top view of a demisting module 10 according to some embodiments of the present application. It should be understood that the demisting module 10 shown in Figure 1 can be assembled with existing components such as a demisting device housing, a sump, and a drain pipe to form a demisting device. This demisting device can be used, for example, to remove droplets from purified flue gas during wet desulfurization processes to achieve gas-liquid separation. This article primarily describes the demisting module 10 and the demisting blades 1 within the demisting device.

[0030] As shown in Figure 1, the demisting module 10 may include multiple demisting blades 1, which may have a certain extension height along the observation direction of Figure 1, so that the flue gas can be processed within a certain range in the extension height direction of the demisting blades 1 (this direction is the observation direction of Figure 1).

[0031] The demisting module 10 may include a positioning member for positioning multiple demisting blades 1. For example, the demisting module 10 may include two side sealing plates 7 (as shown in FIG1 ). The side sealing plates 7 are generally plate-shaped and may be provided with sockets 11 in a plane perpendicular to the extended height of the demisting blades 1. These sockets 11 may correspond to the shapes of the multiple demisting blades 1 in the demisting module 10 in this plane, thereby cooperating with each demisting blade 1 to achieve positioning of the demisting blades 1 and side sealing of the demisting module 10.

[0032] As shown in FIG2 , the demisting blade 1 may include a blade body 2. The blade body 2 may be configured to be wavy along the flue gas inlet direction x, with multiple wave crests. At the wave crests or troughs of the wave shape, the demisting blade 1 may be bent to have a smooth transition portion as shown in FIG1 or FIG2 , or may be bent to have a sharp transition portion.

[0033] As more clearly shown in FIG2 , the demisting blade 1 may further include a hook portion 3 extending away from the blade body 2 at a wave crest. A pocket portion 4 may be formed between the hook portion 3 and the blade body 2, generally facing the flue gas entering the demisting module 10, so that droplets in the flue gas entering along the flue gas entry direction x may be captured in the pocket portion 4. It should be understood that the demisting blade 1 may include a hook portion 3 at each wave crest of the blade body 2, but this is not necessary, that is, the demisting blade 1 may not include a hook portion 3 at one or more wave crests of the blade body 2.

[0034] 1 and 2 , the cooperation between the wavy blade body 2 and the corresponding hook portion 3 allows the flue gas entering from the flue gas inlet 8 to pass through the demisting module 10 along a tortuous route, thereby facilitating the capture of mist droplets at different positions in the direction y.

[0035] Advantageously, each demisting blade 1 may include two or more (e.g., three) peaks to facilitate the capture of mist droplets at different locations in the y direction and at different locations in the x direction. Advantageously, each hook portion 3 may extend from the corresponding peak in a direction tangential to the peak, or may extend along the direction of a section adjacent to the peak. This helps reduce the manufacturing cost and difficulty of the demisting blade 1 and increases the strength of the hook portion 3 connected to the blade body 2. Furthermore, such a structure may facilitate the cleaning of the bag portion 4.

[0036] The blade bodies 2 of each demisting blade 1 can be arranged parallel to each other in the direction y to facilitate balanced treatment of the flue gas. Advantageously, each demisting blade 1 can have the same structure to facilitate balanced treatment of the flue gas. On the basis that the blade bodies 2 of each demisting blade 1 are arranged parallel to each other in the direction y and each demisting blade 1 has the same structure, it is advantageous that the spacing between each two demisting blades 1 in the direction y can be set to be equal to each other, to further facilitate balanced treatment of the flue gas.

[0037] Advantageously, when viewed along the direction of Figures 1 and 2, the width c at the opening 5 of the bag portion 4 can be set to be smaller than the width e at the middle section 6 of the bag portion 4, which helps to avoid or reduce the occurrence of a situation where the mist droplets that have been captured in the bag portion 4 escape from the bag portion 4, resulting in a deterioration in the demisting effect.

[0038] The demisting blade 1 can be made, for example, by a single extrusion molding using a mold. Polypropylene (PP) can be used as the material for making the demisting blade 1. During the manufacturing process, polypropylene particles can be heated and then formed once by an extrusion molding machine.

[0039] As shown in Figures 1 and 2, when observed in a direction perpendicular to the extended height direction of the demisting blade 1, the spacing between adjacent wave peaks of the demisting blade 1 along the direction x can be a, the spacing along the direction y can be b, the width of the opening 5 of the bag portion 4 can be c, and the spacing between two adjacent demisting blades 1 along the direction y can be d.

[0040] In some embodiments, the ratio of spacing a to spacing b can be between 1 and 3, preferably between 1.4 and 1.8, thereby achieving efficient droplet capture while reasonably controlling the manufacturing cost of the demisting module 10. If the ratio of spacing a to spacing b is too small, there is a risk that the distance between the two wave crests is too close, the number of pockets 4 is unnecessarily increased, and the manufacturing cost of the demisting module 10 is unnecessarily increased. In addition, there is a risk that the size of the blade body 1 in the direction y is too large, resulting in a risk of poor flue gas flow through the demisting module 10. If the ratio of spacing a to spacing b is too large, there is a risk that the distance between the two wave crests is too far, which may result in a large number of uncaptured droplets in the flue gas, i.e., a poor demisting effect. In addition, there is a risk that the size of the blade body 1 in the direction y is too small, which may require more blade bodies 1 in the demisting module 10, thereby unnecessarily increasing the cost of the demisting module 10. For example, in some embodiments, the distance a may have a size of 45 to 65 mm, and the distance b may have a size of 25 to 45 mm.

[0041] In some embodiments, the ratio of the spacing a to the width c can be appropriately set to achieve efficient capture of droplets while reasonably controlling the manufacturing cost of the demisting blade 1. If the ratio of the spacing a to the width c is too small, there may be a risk that the distance between the two peaks is too close, the number of pockets 4 is unnecessarily increased, and the manufacturing cost of the demisting blade 1 is unnecessarily increased. In addition, there may also be a risk that the size of the pocket 4 is too large, affecting the smoothness of the flue gas flow through the demisting module 10. If the ratio of the spacing a to the width c is too large, there may be a problem that the distance between the two peaks is too far, and the opening of the pocket 4 may be too small, which may cause each pocket 4 to be unable to fully capture droplets, and more droplets may escape from the outlet of the demisting module 10, thereby leading to the risk of poor demisting effect. For example, in some embodiments, the size of the spacing a can be 45 to 65 mm, and the size of the width c can be 2 to 10 mm.

[0042] In some embodiments, the ratio between the spacing d and the width c can be between 1.5 and 15, and more preferably between 3 and 7.5, so that the smoke can pass smoothly through the demisting module 10 while efficiently capturing the droplets. If the ratio between the spacing d and the width c is too small, there is a risk that the distance between the pocket portion 4 and the trough of the adjacent demisting blade 1 is too close, resulting in the smoke not being able to flow smoothly through the demisting module 10. If the ratio between the spacing d and the width c is too large, there is a risk that the distance between the pocket portion 4 and the trough of the adjacent demisting blade 1 is too far, resulting in the inability of each pocket portion 4 to fully capture the droplets, resulting in a large number of droplets escaping from the outlet of the demisting module 10, and thus the risk of poor demisting effect. For example, in some embodiments, the spacing d can be 15 to 30 mm, and the spacing c can be 2 to 10 mm.

[0043] As shown in FIG2 , in some embodiments, the demisting blade 1 may further include at least one protrusion 9, for example, two or more protrusions 9, disposed on one side or the other relative to all the pockets 4 in the direction x of flue gas entry. As described above, the pockets 4 need to be disposed facing the direction in which flue gas enters the demisting module 10. If the demisting blade 1 is installed upside down in the direction x of flue gas entry, the demisting blade 1 will hardly achieve the desired demisting effect. Therefore, the provision of the protrusions 9 can help prevent the demisting blade 1 from being installed upside down and can facilitate positioning of the demisting blade 1, facilitating installation.

[0044] The demisting module 10 according to the present application can effectively remove the droplets entrained in the purified flue gas in the wet desulfurization process, and has the advantages of simple structure, high strength, low processing difficulty and manufacturing cost, and easy cleaning.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0047] It should be noted that the terms used herein are for the purpose of describing specific aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a" and "the one" shall include the plural forms unless the context clearly indicates otherwise. It will be understood that the terms "include" and "comprise" and other similar terms, when used in the application documents, specify the presence of the stated operations, elements and / or parts, and do not exclude the presence or addition of one or more other operations, elements, parts and / or combinations thereof. As used herein, the term "and / or" includes all arbitrary combinations of one or more related enumerated items. In the description of the drawings, similar reference numerals always represent similar elements.

[0048] Finally, it should be pointed out that the above embodiments are only used to understand the present invention and do not limit the scope of protection of the present invention. For those skilled in the art, modifications can be made based on the above embodiments, and these modifications do not depart from the scope of protection of the present invention.

Claims

1. A demisting module, comprising a plurality of demisting blades and a positioning member for positioning the plurality of demisting blades, each of the demisting blades having a certain extension height in an extension height direction, characterized in that: Each of the demisting blades includes a blade body and one or more hooks, wherein the blade body is wavy in the direction along which the smoke enters and forms a plurality of wave crests, and each hook is configured to extend away from the blade body from the wave crest of the blade body to form a bag portion between the hook and the blade body facing the smoke entering the demisting module, wherein, when viewed in a direction perpendicular to the extended height, the width of the bag portion at the opening is set to be smaller than the width of the bag portion at the middle section.

2. The demisting module according to claim 1, characterized in that: When viewed in a direction perpendicular to the extension height direction, each hook portion extends from a corresponding wave crest in a direction tangential to the wave crest, or extends along a course of a section adjacent to the wave crest.

3. The demisting module according to claim 1, characterized in that: When observed in a direction perpendicular to the extended height, the blade bodies of each demisting blade are arranged parallel to each other in a lateral direction perpendicular to the flue gas entry direction; and / or, each demisting blade has the same structure; and / or, the demisting blade includes at least one protrusion arranged on one side or the other side relative to all pockets in the flue gas entry direction.

4. The demisting module according to claim 1, characterized in that: When observed in a direction perpendicular to the extended height, the blade bodies of each demisting blade are arranged parallel to each other in a transverse direction perpendicular to the flue gas entry direction, and each demisting blade has the same structure, wherein the spacing between every two demisting blades in the transverse direction is equal to each other.

5. The demisting module according to claim 1, characterized in that: The hook portion is provided at each crest of the blade body of each of the demisting blades.

6. The demisting module according to claim 1, characterized in that: When observed in a direction perpendicular to the extending height, a ratio of a spacing between adjacent wave crests of the demisting blades in the smoke entry direction to a spacing in a transverse direction perpendicular to the smoke entry direction is between 1 and 3.

7. The demisting module according to claim 4, characterized in that: When observed in a direction perpendicular to the extending height direction, a ratio between a spacing between two adjacent demisting blades in a transverse direction perpendicular to the flue gas direction and a width of the opening of the pocket portion is between 1.5 and 15.

8. The demisting module according to any one of claims 1 to 7, characterized in that: When viewed in a direction perpendicular to the extension height, the demisting blade satisfies one or more of the following conditions: The spacing between adjacent wave crests of the demisting blades along the smoke inlet direction is between 45 and 65 mm; The spacing between adjacent wave crests of the demisting blades along the transverse direction perpendicular to the flue gas entry direction is between 25 and 45 mm; The width of the opening of the bag portion is between 2 and 10 mm; A distance between two adjacent demisting blades in a transverse direction perpendicular to the flue gas entry direction is between 15 and 30 mm.

9. The demisting module according to any one of claims 1 to 7, characterized in that: The defogger module includes two side sealing plates, which are plate-shaped and provided with sockets in a plane perpendicular to the extension height of the defogger blades. The sockets correspond to the shapes of the multiple defogger blades in the plane, so that they can cooperate with each defogger blade to achieve the positioning of the defogger blades and the side sealing of the defogger module.

10. A demister, characterized in that: The demister comprises a demister module according to any one of claims 1 to 9.

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