Structured packing for gas-liquid mass transfer

Abstract

The present application relates to the field of forming a grid-shaped filling element or assembly element in a mass transfer or heat transfer device, in particular to a structured packing for gas-liquid mass transfer. The structured packing for gas-liquid mass transfer comprises a frame (1) and a packing (2), the packing (2) is arranged on the frame (1), characterized in that: the frame (1) comprises a top ring (11), a bottom ring (12) and an inner frame (13), the top ring (11) and the bottom ring (12) are arranged parallel to each other and the top ring (11) is arranged above the bottom ring (12), the inner frame (13) comprises at least two support units (131), the top edge and the bottom edge of each support unit (131) are fixed on the top ring (11) and the bottom ring (12) respectively, and the packing (2) is wrapped on each support unit (131) respectively. The present application has the beneficial effects of large gas-liquid flux, small tower resistance, high heat and mass transfer efficiency, low price and easy maintenance.

Description

Technical Field

[0001] This invention relates to the field of grid-shaped filling elements or assembly elements that form a unit or component in a mass transfer or heat transfer device, specifically a structured packing for gas-liquid mass transfer. Background Technology

[0002] Packed towers use packing as the basic component for gas-liquid contact and mass transfer. The liquid flows downwards in a film-like manner on the packing surface, while the gas flows upwards in a continuous phase, counter-current to the liquid, facilitating mass and heat transfer between the two phases. The production capacity of a packed tower is closely related to the characteristics of the packing. From the initial randomized packings such as Raschig rings and Pall rings to structured packings such as corrugated packings and grid packings, researchers have never stopped studying packing materials. With the development of science and technology, the study of structured packings will inevitably become a key focus of packed tower technology research. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art and provide a high-efficiency, high-throughput, and low-pressure-drop mass transfer device, this invention discloses a structured packing for gas-liquid mass transfer.

[0004] The present invention achieves its objective through the following technical solution:

[0005] A structured packing for gas-liquid mass transfer includes a frame and packing material, wherein the packing material is arranged on the frame, characterized in that:

[0006] The frame includes a top ring, a bottom ring, and an inner frame. The top ring and bottom ring are arranged parallel to each other, with the top ring positioned above the bottom ring. The diameters of the top ring and bottom ring and the distance between them are adjusted according to the diameter and height of the packed tower. The inner frame includes at least two support units. Each support unit is formed by at least two support frames that are obliquely fixed to each other, forming protrusions and grooves. The support frames are connected in sequence to form a wave-shaped support unit. The top and bottom edges of each support unit are fixed to the top ring and the bottom ring, respectively, and the support units are arranged parallel to each other. In two adjacent support units, the protrusions of one support unit are located in the grooves of the other support unit, thus forming an inner frame fixed between the top ring and the bottom ring and located within the cylindrical space formed by the top ring and the bottom ring. Each support unit is covered with packing material.

[0007] The structured packing material for gas-liquid mass transfer is characterized in that: the angle between two adjacent support frames is 15° to 90°, the angle between the top support frame and the top ring in each support unit is 15° to 90°, and the angle between the bottom support frame and the bottom ring in each support unit is 15° to 90°.

[0008] The structured packing material for gas-liquid mass transfer is characterized in that: when two adjacent support frames are fixed, the top edge of the lower support frame is fixed at a distance of 1 / 4 to 3 / 4 of the total length from the top edge of the middle of the upper support frame.

[0009] The structured packing material for gas-liquid mass transfer is characterized by: a rigid frame and a flexible porous material as the packing material.

[0010] This invention discloses a novel structured packing. A flexible porous material that is inexpensive, has good air permeability, and is highly durable is selected as the packing material, allowing for sufficient contact between the gas and liquid phases, improving the heat and mass transfer efficiency of the packed tower, and reducing the flow resistance within the tower.

[0011] Specifically, the present invention has the following beneficial effects:

[0012] 1. The packing material is made of flexible porous material, which has better air permeability, can increase the gas throughput by more than 30%, and reduce the pressure drop of the tower by 20% to 50%.

[0013] 2. Liquids are more likely to form liquid films on the surface of flexible porous materials, and the contact between the gas and liquid phases is sufficient. During the gas humidification process, the humidification rate reaches 100%.

[0014] 3. Flexible porous materials are inexpensive and durable, effectively reducing costs and maintenance expenses.

[0015] 4. The support unit adopts an interlaced zigzag welding method, leaving interlaced space, which can better intercept gas without intercepting liquid, increase the flooding gas velocity in the tower, and expand the operational flexibility of the packed tower. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the frame structure in this invention;

[0018] Figure 3 This is a cross-sectional schematic diagram of the frame in this invention. Detailed Implementation

[0019] The present invention will be further illustrated below through specific embodiments.

[0020] Example 1

[0021] A structured packing for gas-liquid mass transfer includes a frame 1 and a packing 2, such as... Figures 1-3 As shown, the specific structure is:

[0022] Frame 1 includes a top ring 11, a bottom ring 12, and an inner frame 13. The top ring 11 and the bottom ring 12 are arranged parallel to each other, with the top ring 11 positioned above the bottom ring 12. The diameters of the top ring 11 and the distance between the bottom ring 12 are adjusted according to the diameter and height of the packed tower. The inner frame 13 includes at least two support units 131. Each support unit 131 is formed by at least two support frames 132 that are obliquely fixed to each other, forming protrusions and grooves. The support frames 132 are connected in sequence to form a wave. The support units 131 are shaped like a top ring 11 and a bottom ring 12, respectively. The top and bottom edges of each support unit 131 are fixed on the top ring 11 and the bottom ring 12, respectively. The support units 131 are arranged parallel to each other. In two adjacent support units 131, the protrusion of one support unit 131 is located in the groove of the other support unit 131, thereby forming an inner frame 13 fixed between the top ring 11 and the bottom ring 12 and located in the cylindrical space formed by the top ring 11 and the bottom ring 12. Each support unit 131 is covered with filler 2.

[0023] The angle between two adjacent support frames 132 is 15° to 90°, such as Figure 3 As shown in θ: In this embodiment, 50° is used;

[0024] In each support unit 131, the angle between the top support frame 132 and the top ring 11 is 15° to 90°. Figure 3 As shown by α in the figure: In this embodiment, 50° is used;

[0025] In each support unit 131, the angle between the support frame 132 and the bottom ring 12 located at the bottom is 15° to 90°. Figure 3 As shown in β: In this embodiment, 50° is used.

[0026] When two adjacent support frames 132 are fixed, the top edge of the lower support frame 132 is fixed at a distance of 1 / 4 to 3 / 4 of the total length from the top edge of the middle of the upper support frame 132. In this embodiment, 3 / 4 is used.

[0027] In this embodiment: the frame 1 is made of stainless steel, and the filler 2 is made of non-woven fabric.

[0028] In this embodiment, each support unit 131 is welded in an interlaced zigzag pattern, with a certain staggered space between adjacent support units 131. That is, the top edges of two adjacent support units 131 are spaced on the top ring 11, and the bottom edges of two adjacent support units 131 are spaced on the bottom ring 12, forming a certain angle. The angle opening faces the gas inlet. The spacing between two adjacent support units 131 can be comprehensively considered based on the diameter of the packed tower and the angle, so that the protrusion of one support unit 131 is set in the groove of its adjacent support unit 131 to form an overlap, forming a wave-shaped channel in the inner frame 13.

Claims

1. A structured packing for gas-liquid mass transfer, comprising a frame (1) and a packing (2), the packing (2) being arranged on the frame (1), characterized in that: the frame (1) comprises a top ring (11), a bottom ring (12) and an inner frame (13), the top ring (11) and the bottom ring (12) are arranged parallel to each other, and the top ring (11) is arranged above the bottom ring (12), the inner frame (13) comprises at least two support units (131), each support unit (131) is formed by at least two support frames (132) fixedly arranged at an angle to each other and forms a protrusion and a groove, each support frame (132) is connected in sequence to form a wave-shaped support unit (131), the top edge and the bottom edge of each support unit (131) are fixed on the top ring (11) and the bottom ring (12) respectively, and each support unit (131) is arranged parallel to each other, in two adjacent support units (131), the protrusion of one support unit (131) is arranged in the groove of the other support unit (131), thereby forming the inner frame (13) fixed between the top ring (11) and the bottom ring (12) and arranged in the cylindrical space formed by the top ring (11) and the bottom ring (12), the packing (2) is wrapped on each support unit (131), and the packing (2) is wrapped outside the cylindrical space formed by the top ring (11) and the bottom ring (12); the intersection angle between two adjacent support frames (132) is 15°-90°, the intersection angle between the support frame (132) arranged at the top of each support unit (131) and the top ring (11) is 15°-90°, and the intersection angle between the support frame (132) arranged at the bottom of each support unit (131) and the bottom ring (12) is 15°-90°; when the two adjacent support frames (132) are fixed, the top edge of the lower support frame (132) is fixed at a position in the middle of the upper support frame (132) at a distance of 1 / 4-3 / 4 of the total length from the top edge. The frame (1) is a rigid frame, and the packing (2) is a flexible porous material.

2. The structured packing for gas-liquid mass transfer according to claim 1, characterized in that: ​

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