Dustpan-shaped hole gas-liquid mass transfer sieve plate

Abstract

The invention discloses a dustpan-shaped hole gas-liquid mass transfer sieve plate, and relates to the technical field of flue gas purification and absorption, the sieve plate is obliquely arranged in a treatment chamber, the upper surface of the sieve plate is regularly provided with a dustpan-shaped hole array, and the opening direction of dustpan-shaped holes is perpendicular to the inclination direction of the sieve plate; water-drop-containing wet flue gas enters the treatment chamber from a flue gas inlet formed in the lower portion of the treatment chamber, flows upwards to pass through the lower-layer sieve plate for heat and mass transfer and then enters the upper-layer sieve plate for further heat and mass transfer, so that the water-drop-containing wet flue gas passes through the multiple layers of sieve plates for multiple times of heat and mass transfer, and the purpose of efficient gas-liquid heat and mass transfer is achieved. According to the sieve plate provided by the invention, through the special design of the perforated structure on the sieve plate and the inclined arrangement of the sieve plate in the treatment chamber, the gas-liquid dispersion state can be improved, the mass transfer process can be enhanced, and efficient gas-liquid mass transfer can be realized.

Description

Technical Field

[0001] This invention belongs to the field of flue gas purification and absorption technology, specifically relating to a sieve plate with a sieve-shaped perforated gas-liquid mass transfer structure. Background Technology

[0002] Gas-liquid mass transfer technology is the core means of achieving the separation and purification of mixed gases, and its efficiency directly determines the energy consumption, material consumption, and economic efficiency of the entire process unit. In fields such as wet desulfurization and carbon capture, the gases to be treated are usually characterized by large flow rates and low pollutant partial pressures, which requires mass transfer equipment to have extremely high mass transfer rates and low system resistance. Sieve plates are key components for achieving gas-liquid mass transfer. Existing sieve plate technologies generally suffer from low mass transfer efficiency, leading to problems such as high energy consumption, significant solvent waste, and large equipment size, thus hindering further improvements in process economics. The root cause lies in the uneven bubble formation generated by the gas-liquid contact method of traditional sieve plates, resulting in a large number of large bubbles with ineffective mass transfer. Simultaneously, there are obvious backmixing and dead zones in the liquid flow on the sieve plate, and the gas distribution is also uneven. These factors collectively limit the limits of its mass transfer efficiency. To compensate for insufficient efficiency, higher gas-liquid throughput or more sieve plates are often required, indirectly increasing equipment investment and operating energy consumption.

[0003] In view of this, developing a new type of high-efficiency sieve plate that can fundamentally improve the gas-liquid dispersion state and enhance the mass transfer process has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a sieve plate with a sieve-shaped hole for gas-liquid mass transfer. Through the special design of the structure and layout of the sieve holes on the sieve plate, the gas-liquid dispersion state can be fundamentally improved, the mass transfer process can be enhanced, and efficient gas-liquid mass transfer can be achieved.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A sieve-type perforated gas-liquid mass transfer sieve plate, wherein multiple layers of the sieve plate are arranged at an inclination in the processing chamber, in a left-low-right-high or left-high-right-low configuration.

[0007] Each of the sieve plates has a certain number of scoop-shaped holes regularly opened on its upper surface, and the opening direction of the scoop-shaped holes is perpendicular to the tilt direction of the sieve plate.

[0008] Moistened flue gas containing water droplets enters the treatment chamber through the flue gas inlet located at the bottom of the treatment chamber, flows upward through the lower sieve plate for heat and mass transfer, and then enters the upper sieve plate for further heat and mass transfer, achieving the purpose of efficient gas-liquid heat and mass transfer.

[0009] Furthermore, in the above-mentioned sieve plate with a sieve-shaped perforation for gas-liquid mass transfer, the number of sieve plates in the processing chamber is 1 to 5 layers, and the multiple layers of sieve plates are parallel to each other, or the adjacent layers of sieve plates are inclined in opposite directions to form a figure-eight shape.

[0010] Furthermore, in the above-mentioned sieve plate with a sieve-shaped perforation for gas-liquid mass transfer, the inclination angle α between the sieve plate and the horizontal direction is no greater than 5 degrees.

[0011] Furthermore, in the above-mentioned sieve plate with scoop-shaped orifices for gas-liquid mass transfer, the arrangement rule of the scoop-shaped orifices on the sieve plate is: they are distributed in a multi-row, multi-column array.

[0012] Furthermore, in the above-mentioned sieve plate with swirl-shaped orifices for gas-liquid mass transfer, all swirl-shaped orifices in each column of the sieve plate have the same opening direction, and the opening directions of adjacent columns of swirl-shaped orifices are opposite; or 2 to 15 adjacent columns of swirl-shaped orifices on the sieve plate are defined as a group, the opening directions of the swirl-shaped orifices in each group are the same, and the opening directions of adjacent groups of swirl-shaped orifices with the same number of columns are opposite.

[0013] Furthermore, in the above-mentioned sieve plate with swirl-shaped orifices, the spacing a between two adjacent rows of swirl-shaped orifices is 1 to 6 mm, and the spacing b between two adjacent columns of swirl-shaped orifices is 1 to 6 mm.

[0014] Furthermore, in the above-mentioned sieve plate with scoop-shaped orifices, adjacent rows or groups of scoop-shaped orifices are arranged aligned or staggered.

[0015] Furthermore, the sieve plate with a scoop-shaped orifice for gas-liquid mass transfer as described above, depending on the shape of the scoop-shaped orifice, includes trapezoidal, arc-edged trapezoidal, and bow-shaped scoop-shaped orifices.

[0016] Furthermore, for the scoop-type orifice gas-liquid mass transfer sieve plate described above, for scoop-type orifices with trapezoidal or arc-shaped orifices, the parameters include the upper base L2, the lower base L1, the width W, and the height H, with the length of the lower base L1 being greater than the length of the upper base L2; for scoop-type orifices with an arc-shaped orifice, the parameters include the lower base L1, the width W, and the height H.

[0017] Furthermore, in the above-mentioned sieve plate with a scoop-shaped orifice for gas-liquid mass transfer, the lower bottom side length L1 of the scoop-shaped orifice ranges from 5 to 20 mm, the upper bottom side length L2 ranges from 3 to 18 mm, the height H ranges from 1 to 3 mm, and the width W ranges from 2 to 3 mm.

[0018] Compared with the prior art, the sieve plate with a scoop-shaped perforation for gas-liquid mass transfer provided by the present invention has the following advantages:

[0019] The sieve plate provided by this invention is inclinedly arranged in a processing chamber. A regular array of sieve-shaped holes is formed on the upper surface of the sieve plate, with the opening direction of the holes perpendicular to the inclination direction of the sieve plate. Moistened flue gas containing water droplets enters the processing chamber through a flue gas inlet located at the bottom of the chamber, flows upwards, and undergoes multiple heat and mass transfers through multiple layers of sieve plates. The inclined arrangement of the sieve plate enhances the fluidity of the liquid on the sieve plate surface, increases the degree of gas-liquid turbulence, and enhances the gas-liquid mass transfer coefficient. During the liquid flow, large bubbles formed through the sieve holes are cut and divided into multiple microbubbles, thereby greatly increasing the gas-liquid contact area and ultimately achieving efficient gas-liquid mass transfer. Attached Figure Description

[0020] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The accompanying drawings, together with the following detailed description, are included in and form a part of this specification. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0021] Figure 1 This is a schematic diagram of the installation structure of a sieve plate with a sieve-shaped perforation for gas-liquid transfer, provided in a specific embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of another installation structure of a sieve plate with a sieve-shaped perforation for gas-liquid mass transfer, provided in a specific embodiment of the present invention.

[0023] Figure 3 A schematic diagram of a structure in which the opening directions of the scoop-shaped holes are arranged in a single row, alternating.

[0024] Figure 4 A schematic diagram of a structure in which the opening directions of the scoop-shaped holes are arranged in a single row with staggered and alternating patterns;

[0025] Figure 5 A schematic diagram of a structure in which the openings of a scoop-shaped hole are arranged in two alternating rows aligned;

[0026] Figure 6 A schematic diagram of a structure in which the opening directions of a sieve-shaped hole are arranged in two staggered alternating rows;

[0027] Figure 7 The three-view diagram of the trapezoidal hopper-shaped hole;

[0028] Figure 8 The three-view diagram shows the structure with a trapezoidal hopper-shaped hole on the top surface;

[0029] Figure 9 Here are the three structural views of the trapezoidal hopper-shaped hole with curved edges;

[0030] Figure 10 The three-view diagram shows the structure with a trapezoidal hopper-shaped hole with an arc edge on the top surface;

[0031] Figure 11 The three-view diagram of the arched, scoop-shaped hole;

[0032] Figure 12 The three-view diagram shows the structure with a top-mounted arched hopper-shaped hole. Detailed Implementation

[0033] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0034] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0035] The embodiments or examples disclosed below are used to implement this application. To simplify the disclosure of this application, the components and methods of specific examples are described below. Of course, they are merely examples and are not intended to limit this application.

[0036] In this invention, unless otherwise stated, directional terms such as "up," "down," "front," "back," "left," and "right" are generally used in relation to the directions shown in the accompanying drawings, or in relation to the components themselves in the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0037] Figure 1 This diagram illustrates the installation structure of a sieve plate with scoop-shaped perforations for gas-liquid mass transfer according to an embodiment of the present invention. Multiple sieve plates are arranged at an angle within the treatment chamber, either with the left side lower than the right or vice versa. A certain number of scoop-shaped perforations are regularly formed on the upper surface of the sieve plates, with the opening direction of the perforations perpendicular to the angle of inclination of the sieve plates. Moist flue gas containing water droplets enters the treatment chamber through a flue gas inlet located at the bottom of the chamber, flows upwards through the lower sieve plates for heat and mass transfer, and then enters the upper sieve plates for further heat and mass transfer. In this way, the moist flue gas undergoes multiple heat and mass transfer processes through multiple sieve plates, achieving efficient gas-liquid heat and mass transfer.

[0038] The number of sieve plates in the processing chamber is 1 to 5 layers. In some specific embodiments, the multiple layers of sieve plates arranged at an angle in the processing chamber are parallel to each other, and the angle α between the sieve plates and the horizontal direction is no greater than 5 degrees. For example... Figure 1 As shown, the two sieve plates are arranged with the left side lower than the right side and are parallel to each other.

[0039] In other specific embodiments, the multi-layered sieves arranged at an angle in the processing room have adjacent sieves tilted in opposite directions, forming a figure-eight shape, with the angle α between the sieves and the horizontal direction not exceeding 5 degrees. For example... Figure 2 As shown, the upper sieve plate is arranged with the left side lower than the right side, and the lower sieve plate is arranged with the left side higher than the right side, forming a figure-eight shape.

[0040] The sieve plate has scoop-shaped holes formed by stamping. The arrangement of the scoop-shaped holes on each layer of the sieve plate is as follows: the scoop-shaped holes are distributed in a multi-row, multi-column array.

[0041] In some specific embodiments, all the scoop-shaped holes in each column of the sieve plate have the same opening direction, the opening directions of adjacent columns of scoop-shaped holes are opposite, and the opening directions of adjacent columns are arranged alternately in opposite directions to form a complete sieve plate. The spacing 'a' between adjacent rows of scoop-shaped holes is 1–6 mm, and the spacing 'b' between adjacent columns of scoop-shaped holes is 1–6 mm. For example Figure 3 This is a top view of the sieve plate. From left to right, the first column of scoop-shaped holes faces backward, the second column faces forward, the third column faces backward, the fourth column faces forward, and so on.

[0042] In other specific embodiments, adjacent rows of scoop-shaped holes on the sieve plate are defined as a group, for example, every 2 to 15 rows of scoop-shaped holes form a group. Within each group, the opening direction of the scoop-shaped holes is consistent, and adjacent groups with the same number of rows have opposite opening directions. Multiple groups are arranged with their opening directions alternating in opposite directions to form a complete sieve plate. The spacing 'a' between two adjacent rows of scoop-shaped holes is 1 to 5 mm, and the spacing 'b' between two adjacent columns of scoop-shaped holes is 1 to 5 mm. For example... Figure 5 The top view of the sieve plate shown shows that each group consists of two rows of scoop-shaped holes. From left to right, the opening direction of the first group of scoop-shaped holes is backward, the opening direction of the second group is forward, the opening direction of the third group is backward, the opening direction of the fourth group is forward, and so on.

[0043] In some specific embodiments, adjacent columns or groups of sieve holes are aligned, such as... Figure 3 , 5 As shown. In some other specific embodiments, adjacent columns or groups of sieve holes are staggered, such as... Figure 4 , 6 As shown. For example, Figure 4 In a single-column staggered arrangement, the horizontal center line of each scoop-shaped hole is aligned with the middle position of the two scoop-shaped holes in the adjacent column.

[0044] There are various structures for scoop-shaped holes. Based on the shape of the scoop-shaped hole opening, they can be classified as trapezoidal, arc-edged trapezoidal, or bow-shaped scoop-shaped holes.

[0045] In some specific embodiments, the shape of the scoop-shaped orifice is trapezoidal, as shown in the reference. Figure 7 , 8 As shown. In some other specific embodiments, the shape of the scoop-shaped orifice is a trapezoid with curved edges, as shown in the reference. Figure 9 , 10 As shown. In some other specific embodiments, the shape of the scoop-shaped orifice is arc-shaped, see reference. Figure 11 , 12 As shown.

[0046] For a scoop-shaped hole with a trapezoidal or curved-edge trapezoidal opening, its characteristic parameters include the upper base L2, the lower base L1, the width W, and the height H, where the length of the lower base L1 is greater than the length of the upper base L2. In a specific embodiment, the lower base length L1 of the trapezoidal or curved-edge trapezoid ranges from 5 to 20 mm, the upper base length L2 ranges from 3 to 18 mm, the height H ranges from 1 to 3 mm, and the width W ranges from 2 to 3 mm.

[0047] For a scoop-shaped orifice with an arc-shaped opening, its characteristic parameters include the lower base L1, width W, and height H. In a specific embodiment, the lower base L1 ranges from 5 to 20 mm, the height H ranges from 1 to 3 mm, and the width W ranges from 2 to 3 mm.

[0048] Flue gas containing water droplets can be either flue gas that already contains a certain amount of water droplets, or it can be flue gas containing liquid containing absorbent that is added to the treatment chamber above and below each layer of screen in any way to create conditions for flue gas to contain water droplets.

[0049] This invention provides a sieve plate with a sieve-shaped perforation for gas-liquid mass transfer. The sieve plate is arranged at an inclination within a processing chamber, with a regularly spaced array of sieve-shaped perforations on its upper surface. The opening direction of these perforations is perpendicular to the inclination direction of the sieve plate. Moistened flue gas containing water droplets enters the processing chamber through the flue gas inlet at the bottom and flows upwards through multiple layers of the sieve plate for multiple heat and mass transfer processes. The inclination of the sieve plate enhances the fluidity of the liquid on its surface, increases the degree of gas-liquid turbulence, and improves the gas-liquid mass transfer coefficient. During the liquid flow, large bubbles formed through the sieve holes are cut and divided into multiple smaller bubbles, thereby significantly increasing the gas-liquid contact area and ultimately achieving efficient gas-liquid mass transfer.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention is also intended to include these modifications and variations.

Claims

1. A sieve tray of the bucket type for gas-liquid mass transfer, characterized in that, When in use, the multi-layered sieve plates are arranged at an angle in the processing chamber, with the left side lower than the right or the left side higher than the right. Each of the sieve plates has a certain number of scoop-shaped holes regularly opened on its upper surface, and the opening direction of the scoop-shaped holes is perpendicular to the tilt direction of the sieve plate. Moistened flue gas containing water droplets enters the treatment chamber through the flue gas inlet located at the bottom of the treatment chamber, flows upward through the lower sieve plate for heat and mass transfer, and then enters the upper sieve plate for further heat and mass transfer, achieving the purpose of efficient gas-liquid heat and mass transfer.

2. The perforated gas-liquid mass transfer sieve tray according to claim 1, wherein, The number of sieve plates in the processing chamber is 1 to 5 layers. The multiple layers of sieve plates are parallel to each other, or the adjacent layers of sieve plates are inclined in opposite directions to form a figure-eight shape.

3. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 2, characterized in that, The angle α between the sieve plate and the horizontal direction is no greater than 5 degrees.

4. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 3, characterized in that, The arrangement rule of the sieve plate with the scoop-shaped holes is that they are distributed in a multi-row, multi-column array.

5. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 4, characterized in that, All the scoop-shaped holes in each column of the sieve plate have the same opening direction, and the opening directions of the scoop-shaped holes in two adjacent columns are opposite; or the scoop-shaped holes in 2 to 15 adjacent columns of the sieve plate are defined as a group, the scoop-shaped holes in each group have the same opening direction, and the scoop-shaped holes in adjacent groups of the same number of columns have opposite opening directions.

6. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 5, characterized in that, The spacing a between two adjacent rows of scoop-shaped holes is 1 to 6 mm, and the spacing b between two adjacent columns of scoop-shaped holes is 1 to 6 mm.

7. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 6, characterized in that, Adjacent columns or groups of scoop-shaped holes are arranged aligned or staggered.

8. The sieve plate with a scoop-type perforated gas-liquid mass transfer structure according to any one of claims 1-7, characterized in that, Based on the shape of the scoop-shaped orifice, the structure of the scoop-shaped orifice includes trapezoidal, arc-edged trapezoidal, and bow-shaped scoop-shaped orifices.

9. The sieve plate with a scoop-shaped perforation for gas-liquid mass transfer according to claim 8, characterized in that, For a scoop-shaped hole with a trapezoidal or arc-shaped opening, the parameters include the upper base L2, the lower base L1, the width W, and the height H, with the length of the lower base L1 being greater than the length of the upper base L2; for a scoop-shaped hole with an arc-shaped opening, the parameters include the lower base L1, the width W, and the height H.

10. The sieve plate with a scoop-shaped perforated gas-liquid mass transfer structure according to claim 9, characterized in that, The bottom edge length L1 of the scoop-shaped hole ranges from 5 to 20 mm, the top edge length L2 ranges from 3 to 18 mm, the height H ranges from 1 to 3 mm, and the width W ranges from 2 to 3 mm.

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