Packing for gas-liquid contact

Abstract

The present application provides a packing for gas-liquid contact, which has high gas-liquid contact efficiency and can be formed of light and low-cost material. The present application uses a composite yarn 44 composed of a single fiber and a wire, a combination of a single fiber yarn 42 composed of only a single fiber and a wire yarn 43 composed of only a wire, or a fabric or a knit formed of all or any combination of the single fiber yarn 42, the wire yarn 43, and the composite yarn 44, to constitute a strip-like material 71 having gaps between yarns 46 and yarns 46; and by alternately performing a mountain fold and a valley fold in a direction intersecting the length direction of the strip-like material 41, forming a bellows shape, and stacking a plurality of the bellows-shaped strip-like materials 41, a packing is formed.

Description

Technical Field

[0001] This invention relates to a packing material for gas-liquid contact, which is used to maintain a low pressure loss inside devices such as distillation towers, absorption towers, cooling towers, and water treatment devices with air oxidation, and to allow gas and liquid to contact in a countercurrent, cocurrent, or cross-flow manner, thereby enabling effective mass transfer, heat transfer, and chemical transfer, or a combination thereof, between the gas and liquid. Background Technology

[0002] Packing materials for gas-liquid contact include: irregular packing materials randomly filled in the space within the device without regard to their respective positions or orientations, as shown in Patent Document 1; and regular packing materials manufactured to predetermined dimensions and arranged in a regular manner inside the device. Regular packing materials generally use structures formed by layering thin sheets or mesh sheets made of metal or plastic after corrugated bending, or structures woven from multiple fine metal wires.

[0003] The regular fillers in the aforementioned prior art, because the material itself has the ability to maintain a three-dimensional shape, are not easily affected by fluids and can maintain their shape or position from the initial filling state until the end of use, even when installed inside the device. However, these traditional fillers are limited to materials that can maintain a three-dimensional shape inside the device, thus making it difficult to achieve an ideal gas-liquid contact state, and they also suffer from high cost and heavy weight.

[0004] To address the aforementioned issues, it is best to use industrially mass-producible fiber materials such as natural fibers, chemical fibers, glass fibers, and carbon fibers to form woven or knitted fabrics as fillers for gas-liquid contact. Using these materials can reduce the overall weight of the device, and by achieving a larger surface area and high liquid retention capacity (water retention) due to capillary action, it is expected to improve gas-liquid contact efficiency.

[0005] Existing technical documents Patent documents [Patent Document 1] Japanese Patent Application Publication No. 11-090218 Invention Summary

[0006] The problem that the invention aims to solve However, when fabrics or knitted materials made entirely of the aforementioned fibers are used as fillers for gas-liquid contact, their softness makes it difficult to maintain a three-dimensional shape when installed as fillers in a device, which causes problems. Furthermore, the effectiveness of using fabrics or knitted materials made of the aforementioned fibers as filler materials has not been sufficiently demonstrated in the prior art, therefore gas-liquid contact fillers using fabrics or knitted materials made of this type of fiber as the main material have not been put into practical use.

[0007] Therefore, the present invention aims to solve the above problems and obtain a gas-liquid contact filler that can achieve high gas-liquid contact efficiency and can be formed from lightweight and inexpensive materials.

[0008] [Methods for solving the problem] To address the aforementioned issues, this invention provides a filling material consisting of a composite yarn composed of monofibers and metal wires, a combination of monofiber yarns composed of monofibers and metal wire yarns composed of metal wires, or a fabric or knitted fabric formed from all or any combination of the aforementioned monofiber yarns, metal wire yarns, and composite yarns, and consisting of overlapping strip-shaped materials with gaps between the yarns. Furthermore, in this application, the term "yarn" is used collectively as a general term encompassing the aforementioned composite yarns, metal wire yarns, and monofiber yarns.

[0009] One of the desired conditions for packing materials used in gas-liquid contact is to maximize the surface area of ​​the packing per unit volume of the device, thereby increasing the gas-liquid contact volume. However, conversely, as the surface area increases, the packing density also increases. Therefore, in conventional packing materials, there is a possibility of increased gas flow resistance, leading to a decrease in gas throughput. Thus, to obtain a gas-liquid contact packing material with higher performance, it is necessary to maximize the surface area while minimizing gas flow resistance.

[0010] Furthermore, by using fabrics or knitted materials composed of single fibers with a large surface area and high liquid retention capacity (water retention) to form the filler for gas-liquid contact, uniform gas-liquid contact can be achieved when the entire surface of the filler is wetted, thereby potentially further improving the gas-liquid contact efficiency. In addition, ensuring uniform distribution of gas and liquid within the device and their uniform movement at a constant speed for gas-liquid contact is also crucial for improving the gas-liquid contact effect.

[0011] Therefore, as described above, the present invention comprises a fabric or knitted material formed from yarns composed of one or more monofibers and one or more metal wires, thereby achieving a large overall surface area. Furthermore, by forming the aforementioned fabric or knitted material, a strip-shaped material with gaps between the yarns can be obtained. Therefore, due to the presence of these gaps, the fluid resistance to the gas can be reduced, and gas and liquid can pass through these gaps, allowing for uniform gas-liquid distribution throughout the entire device and easier gas-liquid contact at a uniform velocity.

[0012] Furthermore, as described above, the yarn of this invention, composed of a combination of single fibers and metal wires, maintains its three-dimensional shape well without deformation even when used to form fabrics or knitted garments due to the presence of the metal wires. The single fiber material of this invention can be, for example, a fiber material that can be mass-produced industrially, such as natural fibers, chemical fibers, glass fibers, or carbon fibers. The metal wire material in this invention can be, for example, stainless steel, copper, nickel, or titanium.

[0013] The aforementioned strip material can be formed into a snake-belly shape by alternating mountain and valley folds in its length direction and intersection direction, and can be composed of multiple snake-belly strip materials overlapping each other.

[0014] Furthermore, the strip material can be formed from yarn consisting of one or more single fibers and one or more metal wires, or from single-fiber yarn consisting of one or more single fibers, metal wire yarn consisting of one or more metal wires, or composite yarn consisting of one or more single fibers and one or more metal wires. It should be noted that "single fiber" in this invention refers to short fibers and / or long fibers. Yarn containing single fibers can be yarn containing twisted short fibers, yarn containing bundled long fibers, yarn containing a combination of short and long fibers, etc., and can be appropriately selected according to the application.

[0015] Furthermore, since the strip material is made of fabric or knitted material, fluid can pass through the gaps between the yarns. Therefore, the gas not only diffuses along the surface of the strip material and flows along the surface forming the liquid film, but also passes through the gaps between the liquid-adhered yarns, resulting in countless tiny gas-liquid contacts. This constantly renews the gas-liquid interface, achieving highly efficient gas-liquid contact.

[0016] Furthermore, the aforementioned strip-shaped material can also be formed into a serpentine shape by alternating mountain and valley folds along its length and intersection directions, and by alternately overlapping the front and back sides of the strip-shaped material. By overlapping the strip-shaped material in this way, the mountain fold side of one strip-shaped material can be in contact with the mountain fold side of another strip-shaped material, making it easier for gases and liquids that move longitudinally or laterally along the strip-shaped material from the contact area to repeatedly merge and disperse.

[0017] Furthermore, the present invention can be as follows: Figure 8 As shown in (a), the rigidity of the strip material is increased by increasing the proportion of metal wires in the strip material; as Figure 9 As shown in (a), the distance between the serpentine mountain bends and valley bends is increased to increase the fluid throughput. On the other hand, as... Figure 8 As shown in (b), by reducing the proportion of metal wires in the strip material, it is possible to achieve the following: Figure 9 As shown in (b), the distance between the serpentine mountain folds and valley folds is reduced, thereby increasing the surface area of ​​the gas-liquid contact filler.

[0018] In addition, the aforementioned strip material can also be formed by winding it from one end to the other along its length. Using this method to form a three-dimensional filler simplifies the manufacturing process, eliminates the need for other special components, and thus reduces manufacturing costs.

[0019] As described above, this invention comprises fabrics or knitted fabrics formed from composite yarns composed of monofibers and metal filaments, combinations of monofiber yarns and metal filament yarns, or all or any combination of the aforementioned monofiber yarns, metal filament yarns, and composite yarns. Therefore, it is possible to easily obtain products with a large overall surface area and light weight at low cost. Furthermore, at the intersections of the warp and weft yarns in the fabric or the yarns in the knitted fabric, the gas flowing along the yarns and rising or moving laterally repeatedly merges and disperses with the descending liquid, continuously renewing the gas-liquid interface and thus achieving effective flow characteristics.

[0020] Furthermore, the material is composed of a strip-shaped material with gaps between the yarns, which reduces gas flow resistance. Additionally, the yarn of this invention consists of one or more metal wires and single fibers; due to the capillary effect of the yarn, the liquid diffuses uniformly to the surface of the single fiber, forming a uniform flow. Therefore, the liquid has a uniform effective velocity throughout the device, enabling highly efficient gas-liquid contact. Moreover, the uniform diffusion of the liquid throughout the device, due to its excellent wetting properties, allows for sufficient gas-liquid contact.

[0021] Furthermore, since the present invention is composed of a combination of monofibers and metal filaments, even when used to form fabrics or knitted garments, the presence of the metal filaments ensures good preservation of the three-dimensional shape. In addition, for liquid moving from the monofibers to the metal filaments, capillary action is difficult to occur, and the liquid tends to form small droplets on the surface of the metal filaments. Therefore, these small droplets subsequently return to the monofiber side and diffuse on the monofibers to form a thin liquid film.

[0022] Thus, by combining single fibers and metal wires—different materials—droplets continuously form, disperse, re-aggregate, and separate. Typically, the flow and frequent changes at the gas-liquid interface play a crucial role in achieving effective mass transfer, heat transfer, or chemical reactions between gas and liquid. The gas-liquid contact achieved by combining single fibers and metal wires can be considered to achieve these effects. Attached Figure Description

[0023] Figure 1 : This represents a plan view of the strip material in Embodiment 1 of the present invention.

[0024] Figure 2 : A partial enlarged oblique view of the strip material in Example 1.

[0025] Figure 3 : Figure 1 AA-line cross-section view.

[0026] Figure 4 : An oblique view of the state of multiple strip materials stacked in Example 1.

[0027] Figure 5 : Figure 4 A magnified view of the end face.

[0028] Figure 6 : This is a partial enlarged oblique view showing the packing material of Example 1 installed in the packing tower.

[0029] Figure 7 : indicates a perspective view of Embodiment 2 of the present invention.

[0030] Figure 8 : This represents a partially enlarged plan view of the strip material in Examples 3 and 4.

[0031] Figure 9 : This shows the end face view of the strip material formed in the snake belly shape in Examples 3 and 4.

[0032] 1, 32, 41, 51 Strip materials 4, 46, 55 yarns 42 and 52 single fiber yarns 43 and 53 metal wire yarns 45, 54 gap 46 and 55 yarns Detailed Implementation

[0033] [Example 1] The following description refers to Embodiment 1 of the present invention. Symbol (1) represents a strip material, which is formed into a strip structure of a certain width by weaving yarn (2), and as shown... Figure 1 As shown, the width l of the strip material (1) is 100 mm. The yarn (2) is composed of 9 single fibers (not shown in the figure) and 1 metal wire (not shown in the figure). The single fibers are polyester fibers with a diameter of 0.23 mm, and the metal wire is a stainless steel wire with a diameter of 0.25 mm.

[0034] As described above, by using yarn (2) containing metal wires, i.e., by using yarn (2) to form a strip material (1) and bending the strip material (1) into a three-dimensional shape, its shape can be well maintained during use due to the presence of the metal wires. In this embodiment, a metal wire with a diameter of 0.25 mm is used, but from the perspective of shape retention, a metal wire with a diameter of 0.2 to 0.4 mm is preferred. Furthermore, when using yarn (2) containing metal wires to form a knitted fabric, since the metal wires are bent and tightly wound around each other alternately, a structurally strong filling material (13) can be obtained when the strip material (1) is processed into a serpentine shape.

[0035] Furthermore, the yarn (2) in this embodiment is composed of 9 single fibers and 1 metal wire as described above. However, it is not limited to this in other different embodiments. The number of single fibers and the number of metal wires can be appropriately changed according to the application, so that various different combinations of yarn (2) can be used. In this embodiment and the following embodiment 2, the strip material (1) is formed by weaving the yarn (2). However, in other embodiments, it is not limited to this. As described in embodiments 3 and 4, the strip material (1) can also be formed by weaving the yarn (2).

[0036] Furthermore, since the yarn (2) constituting the present invention is composed of multiple single fibers in addition to metal wires, the liquid diffuses to the entire surface of the single fibers and forms a uniform flow by means of the capillary effect of these single fibers. Therefore, the liquid's descent velocity in the entire packed tower (12) tends to be uniform, thereby achieving effective gas-liquid contact. Moreover, since the liquid diffuses uniformly in the entire packed tower (12), the gas-liquid contact effect can be fully utilized due to its good wetting properties. In addition, the strip material (1) of this embodiment is formed by weaving the yarn (2) composed of multiple single fibers and metal wires, so it is easy to manufacture and inexpensive, while also producing a product with a large overall surface area and light weight.

[0037] Furthermore, in the knitted fabric, at the intersection of the yarns (2), the gas flowing along the yarns (2) and moving upwards or laterally repeatedly merges and disperses with the descending liquid, thus continuously renewing the contact interface between the two fluids and achieving effective flow characteristics. Additionally, since the knitted fabric with the above structure forms a strip material (1), gaps are created between the yarns (2), reducing the fluid resistance of the gas. Therefore, the fluid processing speed and efficiency can be improved.

[0038] like Figure 1 and Figure 2 As shown, the above-mentioned strip material (1) is placed along the... Figure 1The non-perpendicular direction of the length direction of the AA line, that is, alternating mountain and valley bends along the inclined direction, is used to process it into a snake belly shape. The strip material (1) can be processed into a snake belly shape by processing only one piece, or by processing multiple strip materials in an overlapping state.

[0039] In this embodiment and in the following embodiment 2, as described above, the strip material (1) is processed into a snake belly shape to form a filler (13). However, in other embodiments, it is not limited to this, but multiple strip materials (1) that have not been processed into a snake belly shape are stacked and used as fillers.

[0040] In addition, such as Figure 3 As shown, in the cross-sectional shape of the strip material (1), when the surface or back of the strip material (1) is placed on a horizontal plane, the horizontal line represented by the two-point chain line in the figure is used as a reference, and the inclination angle θ between the mountain bend and the valley bend is 30°. Furthermore, as... Figure 3 As shown, the vertical distance m between the mountain top (3) and the valley bottom (4) is set to 10mm, and the horizontal distance n between two adjacent mountain tops (3) is set to 20mm.

[0041] Next, the aforementioned serpentine strip material (1) is cut into specified lengths to form multiple strip materials (1). For example... Figure 4 and Figure 5 As shown, these multiple strips of material (1) are overlapped alternately, with the ventral directions of adjacent strips (1) opposite, so that the surfaces (5) and back sides (6) of adjacent strips (1) face each other. Then, as shown... Figure 4 As shown, with the adjacent strip materials (1) tightly attached, the whole is bundled into a cylindrical shape and a thin strip metal sheet (7) is wrapped around its outer perimeter for fixation, and it is used as a unit (8).

[0042] By overlapping and bundling the strip material (1) into a bundle as described above, such as Figure 5 As shown, the bend side of one strip material (1) can be brought into close contact with the bend side of another strip material (1). From this contact point, gas and liquid can easily and repeatedly combine and disperse through the two strip materials (1). Furthermore, since the strip material (1) is made of knitted fabric, fluid can also pass through the gaps between the yarns (2). That is, gas not only flows and contacts along the liquid film surface formed by diffusion on the surface of the strip material (1), but also passes through the gaps between the yarns (2) with attached liquid, thus causing countless fine gas-liquid contacts to occur simultaneously. Therefore, the contact interface between the two fluids, gas and liquid, is constantly renewed, enabling efficient gas-liquid contact.

[0043] In addition, such as Figure 6As shown, the diameter of the unit (8) is pre-adjusted to be basically the same as the inner diameter of the filling object—the filling tower (12), so that the strip material (1) can be densely laid in the cross-sectional direction of the filling tower (12) without leaving gaps. In addition, in other embodiments, when the cross-sectional area of ​​the filling tower (12) is larger than that in this embodiment, and it is impossible to fill the cross-section of the filling tower with one unit, multiple units can be laid side by side in the cross-sectional direction of the filling tower, so that the strip material (1) can be seamlessly and densely laid in the filling tower (12).

[0044] This embodiment is applicable to a gas-liquid countercurrent contact device, in which the width direction of the strip material (1) is along Figure 6 The arrangement is shown in the vertical direction, and the unit (8) made of strip material (1) is installed inside the filling tower (12). Thus, the ridges (10) and (11) of the strip material (1) constituting the filling can be arranged as shown in the diagram. Figure 2 As shown, it becomes a channel for the gas to rise smoothly.

[0045] [Example 2] In Example 1, as described above, multiple strips of material (1) are bundled into a bundle forming unit (8), and the unit (8) is installed inside the filling tower (12). In this example, the filling material (31) is used to fill a filling tower with a diameter not exceeding 0.3m, and its structure is as follows: the surfaces (5) or back sides (6) of a pair of strips of material (32) are overlapped opposite each other, and in this state, the strips of material (32) are wound multiple times in the same direction from one end to the other along the length direction to form a shape as shown in the figure. Figure 7 The filler (31) shown is easy to manufacture and requires no other special parts, thus reducing costs. It should be noted that the strip material (32) in this embodiment is the same as in embodiment 1, and is a strip material formed into a serpentine shape by bending.

[0046] [Example 3] In Examples 1 and 2 above, the strip material (1) (32) was formed by weaving yarn (2), while in Example 3 and Example 4 below, the strip material (41) (51) was formed by weaving yarn (46) (55). Furthermore, the yarn (2) in Examples 1 and 2 used only one type of composite yarn, which was composed of 9 single fibers (not shown in the figure) and 1 metal wire (not shown in the figure). The yarn (46) in Example 3, as... Figure 8As shown in (a), the strip material (41) is formed by alternating three types of yarns: a single-fiber yarn (42) composed of multiple single fibers, a metal wire yarn (43) composed of multiple metal wires, and a composite yarn (44) composed of multiple single fibers and multiple metal wires, with gaps (45). In this embodiment, except for the above structure, the composition of the remaining filler is the same as in Example 1.

[0047] By selecting single-fiber yarn (42), metal wire yarn (43), and composite yarn (44) to construct the strip material (41), the proportion of metal wire in the strip material (41) is relatively high. Therefore, the overall rigidity of the strip material (41) can be improved, and as... Figure 9 As shown in (a), the spacing between the mountain and valley folds of the serpentine strip material (41) is increased, thereby increasing the fluid throughput of the entire filler.

[0048] [Example 4] In this embodiment 4, as Figure 8 As shown in (b), the strip material (51) is formed by repeatedly arranging two single-fiber yarns (52) with a gap (54) between two metal wire yarns (53) and using a single-fiber yarn (52) composed of multiple single fibers and a metal wire yarn (53) composed of multiple metal wires. The filling material in this embodiment is the same as that in Embodiment 1 except for the structure described above.

[0049] By constructing the strip material (51) with a greater proportion of monofiber yarn (52) than that of metal wire yarn (53), the proportion of metal wire in the strip material (51) is reduced compared to Example 3. Therefore, the rigidity of the strip material (51) in this embodiment is lower than that of the strip material (41) in Example 3. Figure 9 As shown in (b), the spacing between the mountain folds and valley folds of the serpentine strip material (51) is made narrower, thereby increasing the surface area of ​​the filler. Furthermore, due to the higher proportion of monofibers, the overall weight of the device is relatively lighter.

Claims

1. A packing material for gas-liquid contact, characterized in that, The filling material is made of fabric or knitted material: The fabric or knitted material is formed from the following yarns. (1) Composite yarn composed of single fibers and metal wires (2) A combination of monofiber yarn consisting only of single fibers and metal wire yarn consisting only of metal wires, or (3) Composed of all or any combination of the single-fiber yarn, the metal wire yarn, and the composite yarn. The filler is formed by layering strips of material with gaps between the yarns.

2. The packing material for gas-liquid contact according to claim 1, characterized in that, The strip material is formed into a snake-belly shape by alternating and repeating mountain and valley folds along its length direction, and multiple snake-belly strip materials are stacked to form the filler.

3. The packing material for gas-liquid contact according to claim 1, characterized in that, The strip material is made of One or more single fibers, and Yarn composed of one or more metal wires form.

4. The packing material for gas-liquid contact according to claim 1, characterized in that, The strip material is made of Monofiber yarn consisting of one or more single fibers Metal yarn consisting of one or more metal wires, and Composite yarn consisting of one or more single fibers and one or more metal wires form.

5. The packing material for gas-liquid contact according to claim 1, characterized in that, The strip material is formed into a snake-belly shape by alternating mountain and valley folds along its length direction, and the filler is formed by alternating layers of the strip material.

6. The packing material for gas-liquid contact according to claim 1, characterized in that, The strip material is formed by winding it from one end along its length to the other to form the filler.

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