A tubular liquid distributor and absorption tower

Abstract

This invention belongs to the technical field of carbon dioxide absorption towers in carbon capture systems, and provides a tubular liquid distributor and absorption tower. It addresses the technical problems of traditional tubular liquid distributors, such as high overall pressure drop and uneven distribution of flow velocity, pressure, and outlet flow rate, which affects the final carbon capture efficiency. The invention comprises a main pipe, horizontal branches, and inclined branches; all three are located in the same plane; the horizontal branches are perpendicular to the main pipe and symmetrically connected to both sides of the main pipe at the middle position; the inclined branches are symmetrically connected to both sides of the main pipe at predetermined intervals; all inclined branches are symmetrically arranged with the line containing the horizontal branches as the axis of symmetry; the angle between the inclined branches and the main pipe decreases sequentially from the middle position towards the two ends of the main pipe. The liquid distributor of this invention has a lower overall pressure drop and more uniform distribution of flow velocity, pressure, and outlet flow rate within the distributor.

Description

Technical Field

[0001] This invention belongs to the technical field of carbon dioxide absorption towers in carbon capture systems, and particularly relates to a tubular liquid distributor and absorption tower. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Absorption towers are one of the main pieces of equipment in chemical absorption processes. Liquid distributors are an important component of absorption towers. The absorbent is evenly distributed on the packing material by the liquid distributor, forming the initial liquid distribution state. The initial liquid distribution state has a significant impact on the gas-liquid distribution characteristics within the absorption tower, ultimately affecting the carbon capture efficiency. Based on their structure, liquid distributors can be classified into tubular, trough, and disc types. Tubular liquid distributors have advantages such as high spray density, low pressure drop, and convenient installation and disassembly, and are widely used in chemical, metallurgical, and power industries.

[0004] Traditional tubular liquid distributors consist of a main pipe and several parallel branch pipes. These branch pipes are symmetrically arranged on both sides of the main pipe, perpendicular to it, and connected to it. Figure 3 As shown, because the liquid moves in the form of branched flow within the distributor, kinetic energy is gradually converted into static pressure energy. The pressure rises and the flow process is affected by friction resistance, resulting in a high overall pressure drop in traditional tubular liquid distributors. The flow velocity, pressure, and outlet flow rate distribution within the distributor are uneven, thus affecting the final carbon capture efficiency. Summary of the Invention

[0005] To address the technical problems mentioned above, this invention provides a tubular liquid distributor and an absorption tower, which adjusts the branch pipe arrangement to change the flow velocity of the absorbent liquid within the distributor, thereby reducing the overall pressure of the liquid distributor and ensuring uniform distribution of flow velocity, pressure, and outlet flow rate within the distributor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a tubular liquid distributor.

[0008] In one or more embodiments, a tubular liquid distributor includes: a main pipe, horizontal branches, and inclined branches; the main pipe, horizontal branches, and inclined branches are all located in the same plane;

[0009] The horizontal branch pipe is set perpendicular to the main pipe and symmetrically connected to both sides of the middle position of the main pipe;

[0010] The inclined branch pipes are symmetrically connected to both sides of the main pipe at predetermined intervals along the main pipe.

[0011] With the straight line where the horizontal branch pipe is located as the axis of symmetry, all the oblique branch pipes are arranged symmetrically.

[0012] Along the middle position of the main pipe, towards the two ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases sequentially.

[0013] In one embodiment, the tubular liquid distributor further includes an annular pipe, which connects the main pipe, the horizontal branch pipe, and the inclined branch pipes adjacent to both sides of the horizontal branch pipe.

[0014] In one embodiment, the tubular liquid distributor further includes an X-shaped pipe, which connects to the main pipe and oblique branch pipes adjacent to both sides of the horizontal branch pipe.

[0015] In one embodiment, the tubular liquid distributor further includes a first arc-shaped tube, a second arc-shaped tube, a third arc-shaped tube, and a fourth arc-shaped tube;

[0016] The main pipe and the horizontal branch pipes connected to both sides divide the plane of the tubular liquid distributor into four regions: the first region, the second region, the third region, and the fourth region.

[0017] The first arc-shaped pipe is located in the first region and connects to all the inclined branch pipes located in the first region; the second arc-shaped pipe is located in the second region and connects to all the inclined branch pipes located in the second region; the third arc-shaped pipe is located in the third region and connects to all the inclined branch pipes located in the third region; the fourth arc-shaped pipe is located in the fourth region and connects to all the inclined branch pipes located in the fourth region.

[0018] In one embodiment, the tubular liquid distributor further includes: a fifth arc-shaped pipe and a sixth arc-shaped pipe; the fifth arc-shaped pipe connects to a horizontal branch pipe and all inclined branch pipes on one side of the main pipe; the sixth arc-shaped pipe connects to a horizontal branch pipe and all inclined branch pipes on the other side of the main pipe.

[0019] In one implementation, the angle between the inclined branch pipe and the main pipe decreases at equal angles from the middle position of the main pipe to the two ends of the main pipe.

[0020] In one implementation, the length of the oblique branch pipe decreases sequentially from the middle of the main pipe towards its two ends.

[0021] As one implementation, a liquid inlet is also provided on the upper surface of the middle position of the main tube.

[0022] In one implementation, the spacing between adjacent inclined branches on the same side of the main pipe is equal.

[0023] A second aspect of the present invention provides an absorption tower.

[0024] An absorption tower includes: a tower body and a liquid distributor as described above; the liquid distributor is disposed within the tower body.

[0025] The beneficial effects of this invention are:

[0026] (1) The present invention combines the main pipe, horizontal branch pipe and inclined branch pipe. Except for the branch pipe in the middle of the main pipe which adopts a horizontal straight pipe structure, all other straight pipes are replaced with inclined branch pipes at a set angle to the main pipe, forming a tubular liquid distributor with a fishbone arrangement structure. This can reduce the pressure drop of the main pipe and make the flow velocity, pressure and outlet flow rate of the distributor uniform.

[0027] (2) Based on the fishbone-shaped arrangement structure of the tubular liquid distributor, the present invention also adopts an annular pipe to connect the main pipe, the horizontal branch pipe and the oblique branch pipe adjacent to both sides of the horizontal branch pipe, thereby forming a fishbone annular arrangement structure of the tubular liquid distributor, which makes the flow rate in the central area of ​​the main pipe more uniform and reduces the pressure drop in the main pipe below the liquid inlet.

[0028] (3) Based on the fishbone-shaped arrangement structure of the tubular liquid distributor, the present invention also adopts an X-shaped tube to connect the main pipe and the inclined branch pipes adjacent to the horizontal branch pipes on both sides, thereby forming a fishbone X-shaped tube arrangement structure of the tubular liquid distributor, which makes the flow rate in the central area of ​​the main pipe more uniform and reduces the pressure drop in the main pipe below the liquid inlet.

[0029] (4) Based on the fishbone-shaped arrangement structure of the tubular liquid distributor, the present invention also uses four arc-shaped pipes to connect the oblique branch pipes of the corresponding areas, thereby forming a fishbone butterfly-shaped arrangement structure of the tubular liquid distributor. This reduces the pressure drop in the main pipe and makes the flow of each branch pipe more uniform, thus reducing the pressure drop of the branch pipe.

[0030] (5) Based on the fishbone-shaped arrangement structure of the tubular liquid distributor, the present invention also uses two arc-shaped pipes to connect all the oblique branch pipes on the corresponding side of the horizontal pipe, thereby forming a fishbone fan-shaped pipe arrangement structure of the tubular liquid distributor. This reduces the pressure drop in the main pipe and makes the flow of each branch pipe more uniform, thus reducing the pressure drop of the branch pipe.

[0031] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1This is a schematic diagram of a carbon capture system.

[0034] Figure 2 This is a schematic diagram of the absorption tower structure;

[0035] Figure 3 This is a schematic diagram of a traditional tubular liquid distributor.

[0036] Figure 4 This is a schematic diagram of the fishbone-shaped liquid distributor structure according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the fishbone ring-shaped liquid distributor structure according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the fishbone X-type liquid distributor structure according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the fishbone butterfly-shaped liquid distributor structure according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the fishbone fan-shaped liquid distributor structure according to an embodiment of the present invention;

[0041] Figure 9 This is an enlarged view of a portion of the branch pipe of a conventional tubular liquid distributor according to an embodiment of the present invention;

[0042] Figure 10 This is an enlarged view of a partial branch pipe of the fishbone-shaped liquid distributor according to an embodiment of the present invention;

[0043] Figure 11 This is a comparison diagram of the adjustment of the liquid outlet layout;

[0044] Figure 12 This is a comparison diagram of the velocity distribution of the liquid distributor;

[0045] Figure 13 This is a comparison diagram of pressure distribution in liquid distributors;

[0046] Figure 14 This is a comparison chart of the overall pressure of the liquid distributor;

[0047] Figure 15 This is a diagram showing the uneven distribution of liquid at the outlet.

[0048] Among them, 1—main pipe, 2—branch pipe, 3—liquid inlet, 4—horizontal branch pipe, 5—slanted branch pipe, 6—ring pipe, 7—X-type pipe, 8—first arc pipe, 9—second arc pipe, 10—third arc pipe, 11—fourth arc pipe, 12—fifth arc pipe, 13—sixth arc pipe;

[0049] 21—Liquid outlet, 22—Liquid redistributor, 23—Packing, 24—Packing clamping device, 25—Liquid inlet, 26—Gas outlet, 27—Demister, 28—Liquid distributor, 29—Packing support device, 30—Gas inlet. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0051] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0054] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0055] Figure 1 This is a schematic diagram of a carbon capture system. Figure 1 The carbon capture system includes an absorption tower, a regeneration tower, a lean and rich liquor heat exchanger, a lean liquor cooler, a rich liquor pump, a lean liquor pump, a condensate reflux pump, and a reboiler. The carbon capture system structure is an existing structure.

[0056] Figure 2This is a schematic diagram of an absorption tower. The absorption tower includes a liquid outlet 21, a liquid redistributor 22, packing material 23, a packing compaction device 24, a liquid inlet 25, a gas outlet 26, a demister 27, a liquid distributor 28, a packing support device 29, and a gas inlet 30. During operation, the absorbent is evenly sprayed onto the packing surface through the liquid distributor at the top of the tower, while the flue gas, after pretreatment and cooling, enters the absorption tower from the bottom. The absorbent and flue gas fully contact and react on the packing surface. The purified gas, with carbon dioxide removed, is discharged from the top of the tower, while the CO2-rich liquid enters the regeneration tower from the bottom, where high-purity CO2 is desorbed.

[0057] Figure 3 This is a schematic diagram of a traditional tubular liquid distributor. (For example...) Figure 3 As shown, a traditional tubular liquid distributor consists of a main pipe 1 and several parallel branch pipes 2. These branch pipes 2 are symmetrically arranged on both sides of the main pipe, perpendicular to it, and connected to it. Traditional tubular liquid distributors suffer from high overall pressure drop and uneven distribution of flow velocity, pressure, and outlet flow rate within the distributor, thus affecting the final carbon capture efficiency. To solve this technical problem, this invention provides a tubular liquid distributor. The following detailed description, in conjunction with specific embodiments and accompanying drawings, will illustrate this invention.

[0058] Example 1

[0059] This embodiment, based on a traditional tubular liquid distributor, divides branch pipe 2 into a horizontal branch pipe 4 and an oblique branch pipe 5. The tubular liquid distributor in this embodiment is a herringbone type liquid distributor.

[0060] like Figure 4 As shown, in this embodiment, a tubular liquid distributor is provided, which includes: a main pipe 1, a horizontal branch pipe 4, and an inclined branch pipe 5; the main pipe 1, the horizontal branch pipe 4, and the inclined branch pipe 5 are all located in the same plane;

[0061] The horizontal branch pipe 4 is set perpendicular to the main pipe 1 and is symmetrically connected to both sides of the middle position of the main pipe 1.

[0062] The inclined branch pipes 5 are symmetrically connected to both sides of the main pipe 1 at predetermined intervals along the main pipe 1.

[0063] With the straight line where the horizontal branch pipe 4 is located as the axis of symmetry, all the inclined branch pipes 5 are arranged symmetrically.

[0064] Along the middle position of the main pipe 1, towards the two ends of the main pipe 1, the included angle between the inclined branch pipe 5 and the main pipe 1 decreases sequentially.

[0065] In some specific embodiments, the angle between the inclined branch pipe 5 and the main pipe 1 decreases sequentially at equal angles. This allows for a more balanced pressure within each branch pipe of the tubular liquid distributor.

[0066] For example, the decreasing angles can all be 10 degrees or 15 degrees, etc., which can be set by those skilled in the art according to factors such as the number of inclined branches, and will not be described in detail here.

[0067] In other embodiments, the angle between the inclined branch pipe 5 and the main pipe 1 can also decrease at unequal angles according to a preset angle. For example, the decreasing angles can be 10 degrees, 20 degrees, 30 degrees, etc.

[0068] In some specific embodiments, the lengths of the inclined branch pipes 5 decrease sequentially from the middle of the main pipe 1 towards its two ends. This better matches the shape of the absorption tower, ensuring that the liquid outlets arranged on the inclined branch pipes are evenly distributed across the entire cross-section of the absorption tower, thereby improving carbon capture efficiency.

[0069] The main pipe 1 has an inlet 3 located on its upper surface at the middle position. Furthermore, the spacing between adjacent inclined branch pipes 5 on the same side of the main pipe 1 is equal. This reduces the pressure drop in the main pipe and ensures uniform distribution of flow velocity, pressure, and outlet flow rate within the distributor.

[0070] In this embodiment, the main pipe is shortened compared to the length of a conventional tubular liquid distributor. For example, the main pipe length is shortened from 1100mm to 800mm. The liquid distributor has an axisymmetric structure, and the branch pipe arrangement in the upper right 1 / 4 region of conventional tubular and herringbone-type liquid distributors is as follows: Figures 9-10 As shown. The inclined branch pipes used are: branch pipe 1, branch pipe 2, and branch pipe 3; the angle between branch pipe 1 and the main axis of the fishbone-shaped liquid distributor is 60°, and the length is adjusted from 370mm to 300mm; the angle between branch pipe 2 and the main axis of the main axis is 70°, and the length is adjusted from 480mm to 460mm; the angle between branch pipe 3 and the main axis of the main axis is 80°, and the length is adjusted from 540mm to 550mm.

[0071] In this embodiment, the main pipe, horizontal branch pipe and inclined branch pipe are combined. Except for the branch pipe in the middle of the main pipe which adopts a horizontal straight pipe structure, all other straight pipes are replaced with inclined branch pipes at a set angle to the main pipe, forming a tubular liquid distributor with a fishbone arrangement structure. This can reduce the pressure drop of the main pipe and make the flow velocity, pressure and outlet flow rate of the distributor uniform.

[0072] Example 2

[0073] This embodiment is based on Embodiment 1, such as... Figure 5 As shown, the tubular liquid distributor also includes an annular pipe 6, which connects the main pipe 1, the horizontal branch pipe 4, and the oblique branch pipes 5 adjacent to both sides of the horizontal branch pipe 4. In this embodiment, the tubular liquid distributor is a herringbone annular liquid distributor.

[0074] For example, the annular pipe 6 uses an annular pipe with a diameter of 260mm to connect the main pipe 1 below the liquid inlet, the horizontal branch pipe 4, and the inclined branch pipes 5 adjacent to both sides of the horizontal branch pipe 4.

[0075] It should be noted that the diameter of the annular tube 6 can be selected by those skilled in the art based on the actual situation, and will not be described in detail here.

[0076] This embodiment, based on the fishbone-shaped tubular liquid distributor, also uses an annular pipe to connect the main pipe, horizontal branch pipe, and the oblique branch pipe adjacent to both sides of the horizontal branch pipe, thus forming a fishbone annular tubular liquid distributor, which makes the flow rate in the central area of ​​the main pipe more uniform and reduces the pressure drop in the main pipe below the inlet.

[0077] Example 3

[0078] This embodiment is based on Embodiment 1, such as... Figure 6 As shown, the tubular liquid distributor also includes an X-shaped pipe 7, which connects the main pipe 1 and the oblique branch pipes 5 adjacent to both sides of the horizontal branch pipe 4. In this embodiment, the tubular liquid distributor is a herringbone X-shaped liquid distributor.

[0079] For example, the angle between the X-shaped tube and the main tube axis is 55°.

[0080] It is understood that, in other embodiments, those skilled in the art can specifically set the angle between the X-shaped tube and the main tube axis according to the actual situation.

[0081] This embodiment, based on the fishbone-shaped tubular liquid distributor, also uses an X-shaped tube to connect the main pipe and the oblique branch pipes adjacent to the horizontal branch pipes on both sides, thus forming a fishbone X-shaped tubular liquid distributor, which makes the flow rate in the central area of ​​the main pipe more uniform and reduces the pressure drop in the main pipe below the inlet.

[0082] Example 4

[0083] This embodiment is based on Embodiment 1, such as... Figure 7 As shown, the tubular liquid distributor also includes a first arc-shaped tube 8, a second arc-shaped tube 9, a third arc-shaped tube 10, and a fourth arc-shaped tube 11;

[0084] The main pipe 1 and the horizontal branch pipes 4 connected to its two sides divide the plane of the tubular liquid distributor into four regions, namely the first region, the second region, the third region and the fourth region.

[0085] The first arc-shaped pipe 8 is located in the first region and connects to all the inclined branch pipes located in the first region; the second arc-shaped pipe 9 is located in the second region and connects to all the inclined branch pipes located in the second region; the third arc-shaped pipe 10 is located in the third region and connects to all the inclined branch pipes located in the third region; the fourth arc-shaped pipe 11 is located in the fourth region and connects to all the inclined branch pipes located in the fourth region.

[0086] The tubular liquid distributor in this embodiment is a herringbone butterfly-shaped liquid distributor.

[0087] In one or more embodiments, the first arc-shaped tube 8, the second arc-shaped tube 9, the third arc-shaped tube 10, and the fourth arc-shaped tube 11 are all implemented using arc-shaped tubes with a diameter of 1070 mm.

[0088] It is understood that, in other embodiments, those skilled in the art can specifically set the diameters of the first arc-shaped tube 8, the second arc-shaped tube 9, the third arc-shaped tube 10, and the fourth arc-shaped tube 11 according to the actual situation.

[0089] This embodiment, based on the fishbone-shaped tubular liquid distributor, also employs four arc-shaped pipes to connect the corresponding inclined branch pipes, thereby forming a fishbone-shaped tubular liquid distributor. This reduces the pressure drop in the main pipe and makes the flow rate of each branch pipe more uniform, further reducing the pressure drop in the branch pipes.

[0090] Example 5

[0091] This embodiment is based on Embodiment 1, such as... Figure 8 As shown, the tubular liquid distributor further includes: a fifth arc-shaped pipe 12 and a sixth arc-shaped pipe 13; the fifth arc-shaped pipe 12 connects to the horizontal pipe 4 and all the inclined branch pipes 5 on one side of the main pipe 1; the sixth arc-shaped pipe 13 connects to the horizontal pipe 4 and all the inclined branch pipes 5 on the other side of the main pipe. The tubular liquid distributor in this embodiment is a herringbone fan-shaped liquid distributor.

[0092] In one or more embodiments, the fifth arc-shaped tube 12 and the sixth arc-shaped tube 13 are implemented using arc-shaped tubes with a diameter of 1070 mm.

[0093] It is understood that, in other embodiments, those skilled in the art can specifically set the diameters of the fifth and sixth arc-shaped tubes according to the actual situation.

[0094] This embodiment, based on the fishbone-shaped tubular liquid distributor, also employs two arc-shaped pipes to connect all the oblique branch pipes on the corresponding side of the horizontal pipe, thereby forming a fishbone fan-shaped tubular liquid distributor. This reduces the pressure drop in the main pipe and makes the flow rate of each branch pipe more uniform, further reducing the pressure drop in the branch pipes.

[0095] The following simulations are conducted for Examples 1 to 5, using inclined branch pipes: branch pipe 1, branch pipe 2, and branch pipe 3; the horizontal branch pipe remains unchanged, but the main pipe length is shortened from 1100mm to 800mm; the angle between branch pipe 1 and the main pipe axis is 60°, and its length is adjusted from 370mm to 300mm; the angle between branch pipe 2 and the main pipe axis is 70°, and its length is adjusted from 480mm to 460mm; the angle between branch pipe 3 and the main pipe axis is 80°, and its length is adjusted from 540mm to 550mm; the annular pipe uses an annular pipe with a diameter of 260mm; the angle between the X-shaped pipe and the main pipe axis is 55°; and the diameters of the first, second, third, fourth, fifth, and sixth arc-shaped pipes are all 1070mm.

[0096] Figure 12 In the diagram, 'a' represents the velocity distribution of a traditional liquid distributor. Figure 13 In the diagram, 'a' represents the pressure distribution of a traditional liquid distributor. The herringbone-type liquid distributor adjusts the branch pipes to a herringbone arrangement and, by shortening the main pipe length, enhances the flow guiding capacity of the branch pipes, resulting in a more uniform overall flow velocity distribution within the distributor. Figure 12 As shown in b, the fishbone-shaped liquid distributor shortens the flow distance of the absorbent in the main pipe, reduces frictional resistance, and lowers the overall pressure drop of the liquid distributor, as shown in Figure b. Figure 13 As shown in b. Both the fishbone ring-type liquid distributor and the fishbone X-type liquid distributor use branch pipes to connect the main pipe and branch pipe below the inlet, reducing the impact of the absorbent on the main pipe below the inlet, shrinking the high-pressure zone area below the inlet, and uniformizing the flow rate in the central area of ​​the liquid distributor, such as... Figure 12 As shown in c and d, it also reduces the pressure drop in the branch pipe near the inlet, such as Figure 13 As shown in c and d in the diagram. Both the herringbone butterfly-type liquid distributor and the herringbone fan-type liquid distributor use branch pipes connected to the branch pipe sections far from the main pipe, which evens out the flow rate in each branch pipe, such as... Figure 12 As shown in e and f, it also reduces the branch pressure drop, such as Figure 13 As shown in e and f.

[0097] In this embodiment of the invention, the outlet of the tubular liquid distributor is located at the bottom of the horizontal and inclined branch pipes. Traditional liquid distributor outlets, such as... Figure 11 As shown in Figure a, for example, there are 52 liquid outlets at the bottom. It should be noted that the number of liquid outlets can be set according to the actual situation, which will not be detailed here.

[0098] By employing the combination of main pipe, horizontal branch pipe, and inclined branch pipe as described in Examples 1 to 4 above, the liquid outlet at the bottom of the liquid distributor is rearranged, as shown below. Figure 11As shown in b to d, the increased distance between the outlet and the main pipe reduces the flow velocity above the outlet near the main pipe, increases the outlet flow rate, and reduces the unevenness of liquid distribution at the outlet.

[0099] The effectiveness of this invention is verified below using numerical calculation methods: a flow rate of 20m³ / s is used. 3 The absorbent flows in from the inlet, passes through the main pipe, main branch pipe and inclined branch pipe, and then flows out evenly from the 52 outlets at the bottom.

[0100] The numerical calculation results show that:

[0101] Compared to traditional tubular liquid distributors, the overall pressure drop of the tubular liquid distributors in Embodiments 1 to 5 of this invention is reduced by 24.9%, 28.0%, 29.8%, 27.4%, and 6.37%, respectively. Figure 14 As shown;

[0102] The liquid distribution non-uniformity of the tubular liquid distributors in Embodiments 1 to 5 of the present invention was reduced by 17.4%, 22.3%, 25.7%, 27.5%, and 29.5%, respectively. Figure 15 As shown.

[0103] Example 6

[0104] This embodiment provides an absorption tower, which includes: a tower body and a liquid distributor as described in any of the embodiments 1 to 5 above; the liquid distributor is disposed in the tower body.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tubular liquid distributor, characterized in that, include: Main pipe, horizontal branch pipe and oblique branch pipe; the main pipe, horizontal branch pipe and oblique branch pipe are all located in the same plane; The horizontal branch pipe is set perpendicular to the main pipe and symmetrically connected to both sides of the middle position of the main pipe; The inclined branch pipes are symmetrically connected to both sides of the main pipe at predetermined intervals along the main pipe. With the straight line where the horizontal branch pipe is located as the axis of symmetry, all the oblique branch pipes are arranged symmetrically. Along the middle of the main pipe, towards the two ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases sequentially. The upper surface of the main pipe at the middle position is also provided with a liquid inlet; the liquid outlet of the tubular liquid distributor is located at the bottom of the horizontal branch pipe and the inclined branch pipe. The tubular liquid distributor also includes an annular tube, which connects the main pipe, the horizontal branch pipe, and the inclined branch pipes adjacent to both sides of the horizontal branch pipe.

2. A tubular liquid distributor, characterized in that, include: Main pipe, horizontal branch pipe and oblique branch pipe; the main pipe, horizontal branch pipe and oblique branch pipe are all located in the same plane; The horizontal branch pipe is set perpendicular to the main pipe and symmetrically connected to both sides of the middle position of the main pipe; The inclined branch pipes are symmetrically connected to both sides of the main pipe at predetermined intervals along the main pipe. With the straight line where the horizontal branch pipe is located as the axis of symmetry, all the oblique branch pipes are arranged symmetrically. Along the middle of the main pipe, towards the two ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases sequentially. The upper surface of the main pipe at the middle position is also provided with a liquid inlet; the liquid outlet of the tubular liquid distributor is located at the bottom of the horizontal branch pipe and the inclined branch pipe. The tubular liquid distributor also includes an X-shaped pipe, which connects to the main pipe and the inclined branch pipes adjacent to both sides of the horizontal branch pipe.

3. A tubular liquid distributor, characterized in that, include: Main pipe, horizontal branch pipe and oblique branch pipe; the main pipe, horizontal branch pipe and oblique branch pipe are all located in the same plane; The horizontal branch pipe is set perpendicular to the main pipe and symmetrically connected to both sides of the middle position of the main pipe; The inclined branch pipes are symmetrically connected to both sides of the main pipe at predetermined intervals along the main pipe. With the straight line where the horizontal branch pipe is located as the axis of symmetry, all the oblique branch pipes are arranged symmetrically. Along the middle of the main pipe, towards the two ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases sequentially. The upper surface of the main pipe at the middle position is also provided with a liquid inlet; the liquid outlet of the tubular liquid distributor is located at the bottom of the horizontal branch pipe and the inclined branch pipe. The tubular liquid distributor also includes a first arc-shaped tube, a second arc-shaped tube, a third arc-shaped tube, and a fourth arc-shaped tube; The main pipe and the horizontal branch pipes connected to both sides divide the plane of the tubular liquid distributor into four regions: the first region, the second region, the third region, and the fourth region. The first arc-shaped pipe is located in the first region and connects to all the inclined branch pipes located in the first region; the second arc-shaped pipe is located in the second region and connects to all the inclined branch pipes located in the second region; the third arc-shaped pipe is located in the third region and connects to all the inclined branch pipes located in the third region; the fourth arc-shaped pipe is located in the fourth region and connects to all the inclined branch pipes located in the fourth region.

4. A tubular liquid distributor, characterized in that, include: Main pipe, horizontal branch pipe and oblique branch pipe; the main pipe, horizontal branch pipe and oblique branch pipe are all located in the same plane; The horizontal branch pipe is set perpendicular to the main pipe and symmetrically connected to both sides of the middle position of the main pipe; The inclined branch pipes are symmetrically connected to both sides of the main pipe at predetermined intervals along the main pipe. With the straight line where the horizontal branch pipe is located as the axis of symmetry, all the oblique branch pipes are arranged symmetrically. Along the middle of the main pipe, towards the two ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases sequentially. The upper surface of the main pipe at the middle position is also provided with a liquid inlet; the liquid outlet of the tubular liquid distributor is located at the bottom of the horizontal branch pipe and the inclined branch pipe. The tubular liquid distributor further includes: a fifth arc-shaped pipe and a sixth arc-shaped pipe; the fifth arc-shaped pipe connects to the horizontal pipe and all the inclined branch pipes on one side of the main pipe; the sixth arc-shaped pipe connects to the horizontal pipe and all the inclined branch pipes on the other side of the main pipe.

5. The tubular liquid distributor as described in claim 1, 2, 3, or 4, characterized in that, Along the middle of the main pipe, towards both ends of the main pipe, the angle between the inclined branch pipe and the main pipe decreases at equal angles.

6. The tubular liquid distributor as described in claim 1, 2, 3, or 4, characterized in that, Along the middle of the main pipe, the lengths of the inclined branch pipes decrease sequentially towards the two ends of the main pipe.

7. The tubular liquid distributor as described in claim 1, 2, 3, or 4, characterized in that, The spacing between adjacent inclined branches on the same side of the main pipe is equal.

8. An absorption tower, characterized in that, include: The tower body and the liquid distributor as described in any one of claims 1-7; The liquid distributor is located inside the tower.

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