Corrugated plastic packing for absorption towers

Abstract

The utility model discloses a corrugated plastic packing for absorption tower, including a plurality of vertical parallel arrangement's plastic sheet, the continuous and periodic change's compound corrugated structure is pressed on the plastic sheet, and this compound corrugated structure is composed by primary corrugation and secondary corrugation superposition, the extension direction of primary corrugation is with the vertical axis of plastic sheet and presents an angle, the wave shape of secondary corrugation is continuously pressed on the crest and the valley surface of primary corrugation, and the extension direction of secondary corrugation presents an angle with the extension direction of primary corrugation. The utility model discloses through the superposition direction different secondary corrugation on primary corrugation, when gas liquid is crossed, and secondary corrugation will cut and disturb the streamline constantly, produces a large number of vortex, strengthens the interface disturbance and surface update rate of gas liquid two -phase, to improve the mass transfer coefficient greatly, and can guide the liquid that converges in the wave valley to the adjacent channel again in combination guide hole, forces liquid to carry out redistribution on the packing cross section.

Description

Technical Field

[0001] This utility model relates to the field of chemical mass transfer equipment technology, and in particular to a corrugated plastic packing for an absorption tower. Background Technology

[0002] Corrugated packing is a type of structured packing widely used in chemical towers. It consists of several corrugated plastic sheets arranged vertically and parallel to each other. Gas and liquid come into countercurrent contact within the channels formed by the corrugated sheets to carry out mass and heat transfer.

[0003] Existing corrugated plastic packings typically employ a single, regular sine wave or similar corrugated structure. When this structure is in use, the liquid tends to flow rapidly towards the troughs due to gravity as it flows through the regular corrugated channels, resulting in uneven distribution of the liquid across the packing cross-section. Furthermore, the regular corrugations cause the flow paths of the gas and liquid phases to be relatively fixed and smooth, resulting in insufficient turbulence and slow gas-liquid interface renewal, which limits further improvement in mass transfer efficiency.

[0004] Therefore, we propose a corrugated plastic packing material for absorption towers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a corrugated plastic packing for absorption towers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A corrugated plastic packing for an absorption tower includes multiple vertically parallel plastic sheets. A continuous and periodically changing composite corrugated structure is pressed onto the plastic sheets. The composite corrugated structure is composed of superimposed primary corrugations and secondary corrugations. The extension direction of the primary corrugations forms an angle with the vertical axis of the plastic sheets. The waveforms of the secondary corrugations are continuously pressed onto the crests and troughs of the primary corrugations, and the extension direction of the secondary corrugations forms an angle with the extension direction of the primary corrugations.

[0007] In a further embodiment, the angle between the extension direction of the main corrugation and the vertical axis of the plastic sheet is 45-60°, and the angle between the extension direction of the secondary corrugation and the extension direction of the main corrugation is 70-110°.

[0008] In a further embodiment, the wave height of the secondary wave is 1 / 10 to 1 / 5 of the wave height of the primary wave, and the wave pitch of the secondary wave is 1 / 8 to 1 / 4 of the wave pitch of the primary wave.

[0009] In a further embodiment, a plurality of transverse guide holes are spaced apart on the inclined surface of the main corrugation along its waveform length direction, and the guide holes penetrate the plastic sheet.

[0010] In a further embodiment, the outer edge of the flow guide hole is formed with a raised flow guide lip.

[0011] In a further embodiment, the crests and troughs of the main corrugation are stamped with pits at intervals along the length direction.

[0012] In a further embodiment, the recess adopts a non-penetrating structure in the shape of a hemispherical or square groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention superimposes secondary corrugations with different directions onto the main corrugations. When gas and liquid flow through, the secondary corrugations continuously cut and disturb the streamlines, generating a large number of eddies. This enhances the interfacial disturbance and surface renewal rate of the gas and liquid phases, thereby significantly improving the mass transfer coefficient. Furthermore, the secondary corrugations themselves guide and redistribute the liquid. Combined with the guide holes, the liquid gathered in the troughs can be guided to adjacent channels, forcing the liquid to redistribute across the packing cross-section, improving the uniformity of liquid distribution and increasing the effective utilization rate of the packing surface. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a magnified schematic diagram of the trough of the main corrugation of this utility model. Figure 3 This is a schematic diagram of the cross-sectional structure of the guide hole of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the recess in this utility model.

[0015] In the diagram: 1. Plastic sheet; 2. Main corrugation; 3. Secondary corrugation; 4. Guide hole; 5. Guide lip; 6. Recess. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 A corrugated plastic packing for an absorption tower is assembled from multiple identical plastic sheets 1 into a cylindrical packing disc. Multiple packing discs are stacked vertically inside the absorption tower. The plastic sheets 1 are made of materials such as polypropylene (PP) and polyvinyl chloride (PVC).

[0020] On each plastic sheet 1, a composite corrugated structure is embossed by a mold. The main corrugation 2 has a wave height of 12mm, a wave pitch of 25mm, and an inclination angle of 60°. On the surface of the main corrugation 2, a secondary corrugation 3 perpendicular to it is pressed, with a secondary wave height of 1.5mm and a secondary wave pitch of 4mm, which makes the surface of the main corrugation 2 rough.

[0021] A liquid transverse guide hole 4 is opened every 50mm along the inclined surface of the main corrugation 2. The guide holes 4 are arranged in rows along the inclined surface of the main corrugation 2. The outer edge of the guide hole 4 is turned up to form a guide lip 5, which is used to guide the liquid to splash laterally. On the crest line and trough line of the main corrugation 2, a hemispherical pit 6 is punched every few secondary corrugations 3 to accumulate a small amount of liquid and prolong the residence time. The pits 6 are arranged in rows on the crest line and trough line of the main corrugation 2.

[0022] During manufacturing, recesses 6 and guide holes 4 are first punched into preset positions on a flat plastic sheet 1. This process is carried out in a flat state, ensuring precise positioning and uniform punching pressure. Then, secondary corrugations 3 are pressed onto the sheet with recesses 6 and guide holes 4. Finally, using a die unit with maximum stroke, the sheet with recesses 6 and secondary micro-waves is pressed into the final main corrugations 2 in one step. During this process, the previously created recesses 6, guide holes 4, and secondary corrugations 3 will naturally and precisely distribute themselves on the crests, troughs, and slopes of the main corrugations 2 as the flat sheet is bent and stretched, forming an integrated composite structure.

[0023] During operation, the liquid flows from top to bottom within the packing. Upon encountering the main corrugation 2, it is guided to both sides and then dispersed and redistributed by the secondary corrugation 3. When the liquid flows through the guide hole 4, some of the liquid passes through the guide hole 4 and enters the adjacent flow channel, achieving lateral mixing. The liquid passing through the guide hole 4 is dispersed in all directions under the guiding action of the guide lip 5. When the liquid flows through the pit 6, it accumulates locally in the pit 6, prolonging the residence time. The gas flows from bottom to top, passing through the complex composite corrugated channel, experiencing strong disturbances, and making full contact with the liquid to complete the efficient mass and heat transfer process.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A corrugated plastic packing for an absorption tower, comprising multiple vertically parallel plastic sheets (1), characterized in that: The plastic sheet (1) is pressed with a continuous and periodically changing composite corrugated structure, which is composed of a main corrugation (2) and a secondary corrugation (3). The extension direction of the main corrugation (2) is at an angle to the vertical axis of the plastic sheet (1). The waveform of the secondary corrugation (3) is continuously pressed on the surface of the crest and trough of the main corrugation (2), and the extension direction of the secondary corrugation (3) is at an angle to the extension direction of the main corrugation (2).

2. The corrugated plastic packing for an absorption tower according to claim 1, characterized in that: The angle between the extension direction of the main corrugation (2) and the vertical axis of the plastic sheet (1) is 45-60°, and the angle between the extension direction of the secondary corrugation (3) and the extension direction of the main corrugation (2) is 70-110°.

3. The corrugated plastic packing for an absorption tower according to claim 1, characterized in that: The wave height of the secondary wave (3) is 1 / 10 to 1 / 5 of the wave height of the main wave (2), and the wave pitch of the secondary wave (3) is 1 / 8 to 1 / 4 of the wave pitch of the main wave (2).

4. The corrugated plastic packing for an absorption tower according to claim 1, characterized in that: The main corrugation (2) has several transverse guide holes (4) spaced apart along its waveform length direction on its inclined surface, and the guide holes (4) penetrate the plastic sheet (1).

5. The corrugated plastic packing for an absorption tower according to claim 4, characterized in that: The outer edge of the guide hole (4) is formed with a raised guide lip (5).

6. The corrugated plastic packing for an absorption tower according to claim 1, characterized in that: The main corrugations (2) have pits (6) stamped at intervals along the length of the crests and troughs.

7. The corrugated plastic packing for an absorption tower according to claim 6, characterized in that: The recess (6) adopts a non-penetrating structure in the shape of a hemispherical or square groove.

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