Gas distributor and carbon dioxide absorption tower

Abstract

The utility model relates to the technical field of carbon dioxide capture, in particular to a gas distributor and a carbon dioxide absorption tower. The gas distributor comprises an inner cylinder, a perforated plate and a guide plate group, a gas flow channel is formed between the outer peripheral surface of the inner cylinder and the inner peripheral surface of a tower body, and a gas inlet communicated with the gas flow channel is formed in the tower body; a plurality of through holes are formed in the perforated plate, and the perforated plate is connected to the top end of the inner cylinder; the two guide plate groups are symmetrically arranged on the two sides of the inner cylinder by taking the longitudinal axis section of the gas inlet as a symmetric plane; and each flow guide plate group comprises a plurality of flow guide plates which are distributed at intervals along the outer circumferential direction of the inner cylinder body. Smoke entering the gas flow channel can be divided into a plurality of gas flows through the two flow guide plate sets, the smoke is rapidly dispersed, meanwhile, gas and liquid can be separated in the downward flowing process of the gas flows, and therefore liquid drop entrainment is reduced; and a plurality of air flows are reflected upwards by the tower bottom, penetrate through the perforated plate and are further homogenized, so that uniformly distributed air flows are formed.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide capture, in particular to a gas distributor and a carbon dioxide absorption tower. Background Technique

[0002] With the increasingly severe global climate change and environmental problems, reducing the concentration of CO2 in the atmosphere has become an important task in the environmental protection field. Currently, the commonly used CO2 capture technology is the chemical absorption method, that is, using a new type of amine solution to capture carbon dioxide in the flue gas in the absorption tower and realizing the desorption of carbon dioxide in the stripping tower.

[0003] During the operation of the absorption tower, the uniformity of gas distribution has a decisive impact on its absorption efficiency, product quality and operation economy. Therefore, the performance of the gas distributor directly affects the absorption efficiency of CO2 and the operation stability. Currently, the commonly used gas distributors mainly include porous straight tube type, tangential horn type, single tangential loop type, double row vane type, etc. Although these gas distributors meet the requirements of CO2 absorption to a certain extent, in the design of flue gas CO2 absorption towers in the chemical industry, power, steel and other industries, the required gas inlet diameter is very large, and it is difficult to achieve an ideal gas distribution effect with the common gas distributor structure. For example, in the porous straight tube type distributor, most of the gas-liquid two-phase flows out from the tube end, resulting in uneven gas-liquid distribution and too high local hole velocity, which makes the resistance very large; in the single tangential loop type distributor, the resistance of the high-speed two-phase flow in the inlet pipe is large; although the double row vane type distributor has small resistance and less liquid droplet entrainment, the gas velocity distribution at the inlet is uneven.

[0004] Therefore, how to improve the performance of the gas distributor and improve the uniformity of gas distribution in the absorption tower has become a technical problem that needs to be solved urgently by those skilled in the art. Content of the Utility Model

[0005] The first object of the utility model is to provide a gas distributor to solve the technical problems of uneven gas distribution, much liquid droplet entrainment and large gas resistance existing in the existing gas distributors.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A gas distributor is arranged inside the tower body of a carbon dioxide absorption tower and includes an inner cylinder, a perforated plate and a deflector group, wherein:

[0008] An air flow channel is formed between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the tower body, and a gas inlet communicating with the air flow channel is arranged on the tower body;

[0009] A plurality of through holes are arranged on the perforated plate, and it is connected to the top end of the inner cylinder;

[0010] There are two sets of the deflector groups, which are symmetrically arranged on both sides of the inner cylinder with the longitudinal axis section of the gas inlet as the symmetry plane; each set of the deflector groups includes a plurality of deflectors distributed at intervals along the circumferential direction of the inner cylinder; in each set of the deflector groups, the distance between the deflector and the perforated plate shows a decreasing trend in the direction away from the gas inlet.

[0011] Further, each deflector includes an arc-shaped deflector part and a flat-shaped deflector part connected to each other, and the arc-shaped deflector part extends from the flat-shaped deflector part towards the perforated plate;

[0012] In each set of the deflector groups, the distance between the end of the arc-shaped deflector part away from the flat-shaped deflector part and the perforated plate shows a decreasing trend in the direction away from the gas inlet.

[0013] Further, a flow splitting structure is further included, and the flow splitting structure has a fixed end and a tip arranged oppositely, wherein: the fixed end of the flow splitting structure is connected to the outer peripheral surface of the inner cylinder, and the tip of the flow splitting structure faces the gas inlet.

[0014] Further, the flow splitting structure includes two arc-shaped blades, one ends of the two arc-shaped blades are connected to form the tip of the flow splitting structure, and the other ends of the two arc-shaped blades are arranged at intervals and are both connected to the outer peripheral surface of the inner cylinder.

[0015] Further, the radian range of the arc-shaped blade is 60° - 70°.

[0016] Further, a blockage prevention plate is further included, and the blockage prevention plate is connected to the lower side of the flow splitting structure and is connected between the inner cylinder and the tower body.

[0017] Further, a partition plate is further included, and the partition plate is arranged on the side of the inner cylinder away from the gas inlet, and the partition plate is connected between the inner cylinder, the perforated plate and the tower body;

[0018] And / or, a conical cylinder is further included, the periphery of the flared end of the conical cylinder is connected to the bottom of the inner cylinder, the contracted end of the conical cylinder extends into the inner cylinder and faces the perforated plate; a plurality of through holes are distributed on the conical cylinder.

[0019] Further, the through holes on the perforated plate are arranged in concentric circles, the spacing range of each circle is 1m - 1.5m, and the diameter range of the through holes is 0.3m - 0.5m.

[0020] Further, both the inner cylinder and the tower body are cylindrical, and the diameter of the inner cylinder is 0.55 - 0.65 times the diameter of the tower body.

[0021] The second object of the present utility model is to provide a carbon dioxide absorption tower, which includes a tower body and the gas distributor described in any one of the above.

[0022] Advantages of the present utility model:

[0023] The present utility model provides a gas distributor and a carbon dioxide absorption tower. The gas distributor is used to be arranged inside the tower body of the carbon dioxide absorption tower, and it includes an inner cylinder, a perforated plate and a group of flow guiding plates. Specifically: an air flow channel is formed between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the tower body, and a gas inlet communicating with the air flow channel is arranged on the tower body; a plurality of through holes are arranged on the perforated plate, and it is connected to the top end of the inner cylinder; there are two groups of flow guiding plates, which are symmetrically arranged on both sides of the inner cylinder with the longitudinal axis section of the gas inlet as the symmetry plane; each group of flow guiding plates includes a plurality of flow guiding plates spaced apart along the outer circumference of the inner cylinder; in each group of flow guiding plates, the distance between the flow guiding plate and the perforated plate shows a decreasing trend along the direction away from the gas inlet.

[0024] During the working process of the gas distributor provided by the present application, the flue gas entering the air flow channel can be divided into multiple air flows by the two groups of flow guiding plates, so that the flue gas is quickly dispersed. At the same time, gas-liquid separation can also be achieved during the downward flow of the flue gas, thereby reducing liquid droplet entrainment; the multiple air flows are reflected upward through the bottom of the tower and pass through the perforated plate to be further homogenized, thus forming a uniformly distributed air flow. Description of the drawings

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a three-dimensional structure diagram when the gas distributor provided by the embodiment of the present utility model is applied to a carbon dioxide absorption tower;

[0027] Figure 2 It is an air flow schematic diagram during the working process of the gas distributor provided by the embodiment of the present utility model;

[0028] Figure 3 It is an overall structure diagram of the gas distributor provided by the embodiment of the present utility model;

[0029] Figure 4 It is a structure diagram of the gas distributor provided by the embodiment of the present utility model after removing the perforated plate;

[0030] Figure 5Schematic longitudinal sectional view of the gas distributor provided by the embodiment of the present utility model;

[0031] Figure 6 Schematic structural view of the carbon dioxide absorption tower provided by the embodiment of the present utility model;

[0032] Figure 7 Airflow velocity distribution diagram of the cross section of the carbon dioxide absorption tower provided by the embodiment of the present utility model;

[0033] Figure 8 Carbon dioxide concentration distribution diagram of the cross section of the carbon dioxide absorption tower provided by the embodiment of the present utility model;

[0034] Figure 9 System pressure distribution diagram of the carbon dioxide absorption tower provided by the embodiment of the present utility model.

[0035] Icon:

[0036] 100 - Tower body; 101 - Gas inlet;

[0037] 1 - Inner cylinder; 2 - Perforated plate; 3 - Deflector; 31 - Arc-shaped deflector part; 32 - Planar deflector part; 4 - Flow splitting structure; 41 - Arc-shaped blade; 5 - Anti-blocking plate; 6 - Partition plate; 7 - Conical cylinder. Specific embodiments

[0038] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] It should be noted that in the description of the present utility model, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] One embodiment of the present utility model provides a gas distributor. Referring to Figure 1 , the gas distributor is configured to be disposed inside the tower body 100 of a carbon dioxide absorption tower, and it includes an inner cylinder 1, a perforated plate 2, and a deflector plate group, wherein:

[0042] An air flow channel is formed between the outer peripheral surface of the inner cylinder 1 and the inner peripheral surface of the tower body 100, and a gas inlet 101 communicating with the air flow channel is provided on the tower body 100;

[0043] A plurality of through holes are provided on the perforated plate 2, and it is connected to the top end of the inner cylinder 1;

[0044] There are two groups of deflector plate groups, which are symmetrically disposed on both sides of the inner cylinder 1 with the longitudinal axis section of the gas inlet 101 as the symmetry plane; each group of deflector plate groups includes a plurality of deflector plates 3 that are circumferentially spaced apart along the outer periphery of the inner cylinder 1; in each group of deflector plate groups, the distance between the deflector plate 3 and the perforated plate 2 shows a decreasing trend in the direction away from the gas inlet 101.

[0045] In the above structure, the two groups of deflector plate groups are symmetrically disposed on both sides of the inner cylinder 1 with the longitudinal axis section of the gas inlet 101 as the symmetry plane. Correspondingly, the longitudinal axis section of the gas inlet 101 also divides the air flow channel into two flow channel parts, and the two groups of deflector plate groups are correspondingly disposed in the two flow channel parts.

[0046] Referring to Figure 2 , the working principle of the gas distributor is as follows:

[0047] When the flue gas enters the air flow channel from the gas inlet 101, the flue gas is divided into two parts and respectively enters the two flow channel parts around both sides of the inner cylinder 1. In this way, the flue gas laterally entering the air flow channel is preliminarily diffused, reducing the collision of the air flow, and thus reducing the loss of gas energy;

[0048] Then, when the flue gas in the flow channel part passes through each deflector plate 3, a part of the flue gas flows downward under the blocking and guiding of the deflector plate 3, and another part of the flue gas continues to flow around the inner cylinder 1 through the gap between the deflector plate 3 and the perforated plate 2; under the guiding action of a plurality of deflector plates 3, the flue gas in the flow channel part is further divided into multiple air flows, enabling the flue gas entering the air flow channel to be further diffused;

[0049] Finally, the multiple downward flowing air currents are reflected by the bottom of the tower and turn back upward, passing through the inner cylinder 1 and the perforated plate 2 in sequence; the perforated plate 2 can reduce the eddy current at the outlet of the distributor, further evenly distribute the reflected flue gas, and thus form a uniformly distributed air current above the distributor.

[0050] In summary, during the operation of the gas distributor provided in this application, the two groups of guide vane groups can divide the flue gas entering the air flow channel into multiple air currents, enabling the flue gas to be quickly and evenly dispersed. At the same time, during the downward flow of the flue gas, gas-liquid separation can also be achieved, thereby reducing droplet entrainment; the multiple air currents are reflected upward by the bottom of the tower and pass through the perforated plate 2, and then are further homogenized, thus forming a uniformly distributed air current.

[0051] Optionally, both the inner cylinder 1 and the tower body 100 are cylindrical, and the diameter of the inner cylinder 1 is 0.55 - 0.65 times the diameter of the tower body 100.

[0052] In this embodiment, several guide vanes 3 in each group of guide vane groups are equally spaced along the outer circumference of the inner cylinder 1; and / or, in each group of guide vane groups, the distance between the guide vane 3 and the perforated plate 2 decreases arithmetically along the direction away from the gas inlet 101. The above settings can evenly divide the flue gas entering the air flow channel into multiple air currents, further improving the uniformity of gas distribution.

[0053] Specifically, in each group of guide vane groups, the lower end surface of each guide vane 3 is flush with the lower end surface of the inner cylinder 1, and the height of the guide vane 3 gradually increases along the direction away from the gas inlet 101. Correspondingly, the distance between the guide vane 3 and the perforated plate 2 gradually decreases along the direction away from the gas inlet 101; in this way, under the successive blockages of the multiple guide vanes 3, the flue gas is evenly separated into multiple air currents, achieving the uniform dispersion of the flue gas.

[0054] Optionally, the number of guide vanes 3 in each group of guide vane groups is 4 - 8.

[0055] Further, each guide vane 3 includes an arc-shaped guiding portion 31 and a flat guiding portion 32 connected to each other. The arc-shaped guiding portion 31 extends from the flat guiding portion 32 towards the perforated plate 2, and the inner arc surface of the arc-shaped guiding portion 31 faces the air inlet direction;

[0056] In each group of guide vane groups, the distance between the end of the arc-shaped guiding portion 31 away from the flat guiding portion 32 and the perforated plate 2 shows a decreasing trend along the direction away from the gas inlet 101.

[0057] In the above structure, the setting of the arc-shaped guiding portion 31 can enable the air current to flow smoothly downward, reduce the impact force of the air current on the guide vane 3, and thus reduce the vibration of the distributor.

[0058] Refer to Figure 3, in this embodiment, the through holes on the perforated plate 2 are arranged in concentric circles. The distance between adjacent two circles ranges from 1 m to 1.5 m, and the diameter of the through holes ranges from 0.3 m to 0.5 m. Under the above parameters, the perforated plate 2 can also be used as a support plate for the packing, that is, the packing can be directly placed on the perforated plate 2, so as to improve the space utilization rate of the tower body 100.

[0059] On the basis of the above structure, a part of the through holes on the perforated plate 2 is located inside the inner ring of the inner cylinder 1, and the other part is located between the outer ring of the inner cylinder 1 and the inner ring of the tower body 100. In this way, a small amount of flue gas in the gas flow channel can pass through the through holes located between the outer ring of the inner cylinder 1 and the inner ring of the tower body 100 and enter above the distributor, and the reversed gas flow can pass through the through holes located inside the inner ring of the inner cylinder 1 and enter above the distributor, avoiding the area where there is a lack of gas above the distributor and further improving the uniformity of the gas distribution above the distributor.

[0060] Refer to Figure 4 , the gas distributor further includes a flow splitting structure 4. The flow splitting structure 4 has a fixed end and a tip end arranged oppositely, wherein: the fixed end of the flow splitting structure 4 is connected to the outer peripheral surface of the inner cylinder 1, and the tip end of the flow splitting structure 4 faces the gas inlet 101. In the above structure, the tip end of the flow splitting structure 4 is directly opposite to the gas inlet 101. Therefore, the flue gas entering the tower body 100 from the gas inlet 101 is split into two parts under the shearing of the flow splitting structure 4. The two parts of the flue gas respectively flow tangentially along the two side wall surfaces of the inner cylinder 1 and form multiple downward flowing gas flows respectively under the guidance of the two groups of guide vane groups.

[0061] In this embodiment, the flow splitting structure 4 includes two arc-shaped blades 41. One ends of the two arc-shaped blades 41 are connected to form the tip end of the flow splitting structure 4, and the other ends of the two arc-shaped blades 41 are arranged at intervals and are both connected to the outer peripheral surface of the inner cylinder 1. Specifically, the outer arc surfaces of one ends of the two arc-shaped blades 41 are connected, and the outer arc surfaces of the other ends of the two arc-shaped blades 41 are both connected to the outer peripheral surface of the inner cylinder 1. In this way, the above two parts of the flue gas can respectively flow smoothly along the inner arc surfaces of the two arc-shaped blades 41 to both sides of the inner cylinder 1.

[0062] On the basis of the above structure, the radian range of the arc-shaped blade 41 is 60° to 70°. The radian of the arc-shaped blade 41 can be adjusted adaptively according to the diameters of the inner cylinder 1 and the tower body 100, and no limitation is made here.

[0063] In other embodiments, the arc-shaped blade 41 can also be replaced by a planar blade.

[0064] Furthermore, the gas distributor further includes an anti-blocking plate 5. The anti-blocking plate 5 is connected to the lower side of the flow splitting structure 4 and is connected between the inner cylinder 1 and the tower body 100.

[0065] Specifically, the anti-blocking plate 5 is in a fan-shaped structure. The inner arc surface of the anti-blocking plate 5 is connected to the inner cylinder body 1, the outer arc surface of the anti-blocking plate 5 is connected to the tower body 100, and the upper end surface of the anti-blocking plate 5 is connected to the lower side of the flow distribution structure 4. The anti-blocking plate 5 can separate the gas inlet 101 from the upward-returning air flow, avoiding interference between the flue gas entering from the gas inlet 101 and the upward-returning air flow, thereby reducing the vibration of the tower body 100; in addition, the anti-blocking plate 5 can also block the liquid level from rising to the gas inlet 101, thus avoiding liquid overflow.

[0066] Referring to Figure 3 and Figure 4 , the gas distributor further includes a partition plate 6. The partition plate 6 is arranged on the side of the inner cylinder body 1 away from the gas inlet 101 (i.e., the side away from the flow distribution structure 4), and the partition plate 6 is connected between the inner cylinder body 1, the perforated plate 2 and the tower body 100.

[0067] Specifically, the two opposite side surfaces of the partition plate 6 in the horizontal direction are respectively connected to the inner cylinder body 1 and the tower body 100, and the upper end surface of the partition plate 6 is connected to the perforated plate 2. In the above structure, the flow distribution structure 4 and the partition plate 6 divide the air flow channel between the inner cylinder body 1 and the tower body 100 into two symmetric flow channel parts, and two groups of guide vane groups are symmetrically arranged on both sides of the flow distribution structure 4 and the partition plate 6.

[0068] Referring to Figure 5 , the gas distributor further includes a conical cylinder 7. The periphery of the flared end of the conical cylinder 7 is connected to the bottom of the inner cylinder body 1, and the constricted end of the conical cylinder 7 extends into the inner cylinder body 1 and faces the perforated plate 2; a plurality of through holes are distributed on the conical cylinder 7. The conical cylinder 7 is used to guide the returning air flow so that the returning air flow flows towards the center of the inner cylinder body 1; during the process that the returning air flow flows towards the center of the inner cylinder body 1 along the inner circumference of the conical cylinder 7, part of the gas directly passes upward through the through holes on the conical cylinder 7, so that the gas is evenly dispersed in the inner cylinder body 1.

[0069] In summary, in the gas distributor provided in this embodiment, a flow splitting structure 4 is provided on the outer peripheral surface of the inner cylinder 1, and the tip of the flow splitting structure 4 faces the gas inlet 101; a partition plate 6 is provided on the side of the inner cylinder 1 away from the flow splitting structure 4. The gas flow channel between the inner cylinder 1 and the tower body 100 is divided into two symmetrically arranged flow channel branches by the flow splitting structure 4 and the partition plate 6. After the flue gas enters the gas flow channel from the gas inlet 101, the flow splitting structure 4 can divide the flue gas into two parts and enter the two flow channel branches respectively, so that the flue gas laterally entering the tower body 100 is preliminarily diffused, reducing the collision of the gas flow. A set of guide vane groups is provided in each flow channel branch, and each set of guide vane groups includes a plurality of guide vanes 3 evenly distributed at equal intervals along the outer circumference of the inner cylinder 1. The flue gas entering the flow channel branch is further formed into multiple downward flowing gas flows under the guidance of the multiple guide vanes 3, so that the flue gas is quickly and evenly dispersed, and at the same time, gas-liquid separation is achieved, reducing liquid droplet entrainment. The perforated plate 2 is connected to the upper ends of the inner cylinder 1, the flow splitting structure 4 and the partition plate 6. Thus, the gas flow that turns back upward sequentially passes through the inner cylinder 1 and the perforated plate 2 and enters above the distributor. The perforated plate 2 can reduce the eddy current at the outlet of the distributor, so that the flue gas finally forms a gas flow evenly distributed in the radial direction. The anti-blocking plate 5 is provided on the lower side of the flow splitting structure 4, which can separate the gas inlet 101 from the upward turning back gas flow and the liquid level, thereby reducing the vibration of the tower body 100 and preventing liquid overflow.

[0070] The gas distributor can be formed by a welding process, that is, the inner cylinder 1, the perforated plate 2, the guide vanes 3, the flow splitting structure 4, the anti-blocking plate 5, the partition plate 6 and the conical cylinder 7 are fixed by welding, so that the gas distributor forms an integral structure for easy disassembly and assembly of the gas distributor.

[0071] The gas distributor provided in this embodiment has excellent performance and reasonable structure, which not only effectively improves the gas distribution effect, but also reduces the vibration of the tower body 100 and avoids liquid overflow from the gas inlet 101.

[0072] Another embodiment of the present utility model provides a carbon dioxide absorption tower. Referring to Figure 6 , the carbon dioxide absorption tower includes a tower body 100 and the gas distributor described in any one of the above embodiments. This carbon dioxide absorption tower at least has all the technical effects of the above gas distributor, which will not be elaborated here.

[0073] Figure 7 Specifically, when the diameter of the carbon dioxide absorption tower is 18000 mm and the diameter of the gas inlet 101 is 5200 mm, it is the gas flow velocity distribution diagram of the cross-section 1 m above the distributor. From Figure 7 it can be seen that the gas flow velocity distribution of the cross-section 1 m above the distributor is uniform and there is no eddy current phenomenon.

[0074] Figure 8Specifically, it is the carbon dioxide concentration distribution diagram at the cross-section 1 m above the distributor when the diameter of the carbon dioxide absorption tower is 18000 mm and the diameter of the gas inlet 101 is 5200 mm. From Figure 8 it can be seen that the CO2 concentration difference at this cross-section is small and the gas distribution is uniform.

[0075] Figure 9 This is the system pressure distribution diagram of the carbon dioxide absorption tower provided in this embodiment. By analyzing the recorded data of the average pressures of the YZ cross-section and the XZ cross-section of the absorption tower, it is obtained that the pressure drop of the gas distributor provided in this embodiment is only 90 Pa, and its resistance is small.

[0076] After actual inspection, the gas distributor provided in this application has excellent performance, and it can effectively improve the problems existing in the prior art such as uneven gas distribution, more droplet entrainment, and large gas resistance.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas distributor, used for being arranged in a tower body (100) of a carbon dioxide absorption tower, characterized in that: It comprises an inner cylinder (1), a porous plate (2) and a guide plate group, wherein: An air flow channel is formed between the outer circumferential surface of the inner cylinder (1) and the inner circumferential surface of the tower body (100), and the tower body (100) is provided with a gas inlet (101) connected to the air flow channel; The porous plate (2) is provided with a plurality of through holes, which are connected to the top end of the inner cylinder (1); The guide plate groups are provided in two groups and are symmetrically arranged on both sides of the inner cylinder (1) with the longitudinal axis section of the gas inlet (101) as a symmetry plane; each group of the guide plate groups comprises a plurality of guide plates (3) spaced apart and distributed along the outer circumference of the inner cylinder (1); in each group of the guide plate groups, the distance between the guide plate (3) and the porous plate (2) decreases in a direction away from the gas inlet (101).

2. The gas distributor according to claim 1, characterized in that Each of the guide plates (3) comprises an arc-shaped guide portion (31) and a plane-shaped guide portion (32) connected to each other, the arc-shaped guide portion (31) extending from the plane-shaped guide portion (32) toward the porous plate (2), and the inner arc surface of the arc-shaped guide portion (31) faces the air intake direction; In each group of guide plates, the distance between one end of the arc-shaped guide portion (31) away from the planar guide portion (32) and the porous plate (2) decreases in a direction away from the gas inlet (101).

3. The gas distributor according to claim 1, characterized in that: It also includes a diversion structure (4), the diversion structure (4) having a fixed end and a tip that are arranged opposite to each other, wherein: the fixed end of the diversion structure (4) is connected to the outer peripheral surface of the inner cylinder (1), and the tip of the diversion structure (4) faces the gas inlet (101).

4. The gas distributor according to claim 3, characterized in that: The flow-dividing structure (4) comprises two arc-shaped blades (41), one ends of the two arc-shaped blades (41) are connected to form the tip of the flow-dividing structure (4), and the other ends of the two arc-shaped blades (41) are arranged at intervals and are both connected to the outer peripheral surface of the inner cylinder (1).

5. The gas distributor according to claim 4, characterized in that: The arc angle of the arc-shaped blade (41) ranges from 60° to 70°.

6. The gas distributor according to claim 4, characterized in that: It also comprises an anti-blocking plate (5), which is connected to the lower side of the diversion structure (4) and connected between the inner cylinder (1) and the tower body (100).

7. The gas distributor according to claim 1, characterized in that: It also comprises a partition plate (6), the partition plate (6) being arranged on a side of the inner cylinder (1) away from the gas inlet (101), and the partition plate (6) being connected between the inner cylinder (1), the porous plate (2) and the tower body (100); And / or, it also includes a conical cylinder (7), the periphery of the expanded end of the conical cylinder (7) is connected to the bottom of the inner cylinder (1), and the contracted end of the conical cylinder (7) extends into the inner cylinder (1) and faces the porous plate (2); and a plurality of through holes are distributed on the conical cylinder (7).

8. The gas distributor according to any one of claims 1 to 6, characterized in that: The through holes on the porous plate (2) are arranged in concentric circles, and the distance between two adjacent circles ranges from 1m to 1.5m; The diameter of the through hole ranges from 0.3m to 0.5m.

9. The gas distributor according to any one of claims 1 to 6, characterized in that: The inner cylinder (1) and the tower body (100) are both cylindrical, and the diameter of the inner cylinder (1) is 0.55 to 0.65 times the diameter of the tower body (100).

10. A carbon dioxide absorption tower, characterized in that: It comprises a tower body (100) and a gas distributor according to any one of claims 1 to 9.

Images