Orifice flow disc type liquid distributor suitable for complex working conditions or media and using method

Abstract

The invention belongs to the technical field of chemical equipment, and particularly relates to an orifice flow disc type liquid distributor suitable for complex working conditions or media and a using method. Comprising a liquid distribution tank, a plurality of gas rising pipes and liquid distribution holes are uniformly distributed at the bottom of the liquid distribution tank, the liquid distribution holes are uniformly distributed around each gas rising pipe, a supporting disc is arranged on each gas rising pipe, and a plurality of layers of liquid baffles are detachably arranged on each supporting disc. The height and the number of the liquid baffles can be adjusted according to actual working conditions to adapt to flow fluctuation, liquid foam entrainment during large flow or sparse distribution during small flow is avoided, and liquid distribution uniformity is improved; according to media with different viscosities and solid contents, adhesion, accumulation and blockage can be reduced by changing the shape and the height; the number, height and shape can be flexibly adjusted, energy consumption and separation efficiency can be balanced, resistance can be reduced, or interception can be enhanced; and due to the detachable design, crystals and particles can be cleaned conveniently, the device can adapt to multiple process scenes without replacing the whole structure, and the adaptability and economical efficiency of the device are greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical equipment, and particularly relates to a hole flow disc type liquid distributor suitable for complex working conditions or media and a use method. BACKGROUND

[0002] A packed tower is a separation device widely used in the petrochemical industry. As a core mass transfer equipment, it has simple structure, low pressure drop and high mass transfer efficiency. The key to efficient mass transfer is uniform gas-liquid distribution, and the liquid distributor is the core guarantee.

[0003] In recent years, the hole flow disc type liquid distributor has been widely used due to its large liquid flux, excellent distribution performance, small occupation of the tower space, convenient installation, large operation flexibility and easy adjustment of the horizontal degree. The main structure of the hole flow disc type liquid distributor is a distribution disc with liquid downcomer holes and a riser assembly, which is suitable for high-purity separation, multiphase flow and high liquid load working conditions. However, the existing hole flow disc type liquid distributor has certain defects. It is sensitive to flow fluctuations, the fixed structure can easily lead to entrainment of liquid mists at large flow rates and sparse distribution at small flow rates; it has poor adaptability to media, high-viscosity liquids are prone to adhere and accumulate, and particle-containing liquids are prone to be blocked in dead corners; it is difficult to balance energy consumption and separation efficiency with fixed liquid baffle plates, and excessive resistance can lead to high energy consumption or insufficient interception; it is difficult to maintain, and it is inconvenient to clean after crystallization and particle blockage; and it has poor universality, and the overall structure needs to be replaced for process switching, which is not good in adaptability and economy. SUMMARY

[0004] The purpose of the present application is to provide a hole flow disc type liquid distributor suitable for complex working conditions or media and a use method, so as to solve the technical problem in the prior art that the distributor has poor adaptability to complex working conditions and needs to be replaced as a whole. To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application: In a first aspect, the present application discloses a hole flow disc type liquid distributor suitable for complex working conditions or media, which comprises a liquid distribution groove, a plurality of risers and liquid distribution holes are uniformly distributed at the bottom of the liquid distribution groove, and the liquid distribution holes are uniformly arranged around each riser, a support disc is arranged on the riser, and a plurality of layers of liquid baffle plates are detachably arranged on the support disc.

[0005] Preferably, the support disc is welded on the riser, the plurality of liquid baffle plates are detachably connected with the support disc through studs and nuts, and threaded holes are uniformly formed on the support disc and the liquid baffle plates, respectively.

[0006] Preferably, the outermost liquid baffle plate in the plurality of layers of liquid baffle plates is a disc, the inner liquid baffle plates are center-holed circular flat plates, and the diameters of the center-holes decrease from top to bottom.

[0007] Preferably, the liquid distribution groove is a coverless cylinder formed by welding a hole flow disc and an outer cylinder, and a gap of 10-50 mm exists between the liquid distribution groove and the inner wall of the tower.

[0008] Preferably, the height ratio of the outer cylinder to the riser is 1.1-1.5:1.

[0009] Preferably, the bottom of the liquid distribution groove is uniformly provided with a plurality of riser holes, the riser penetrates the flow tray through the insertion into the riser hole, the riser is a gas phase passage of the packed tower, the riser is a hollow structure, the cross section is circular, the lower end of the riser is flush with the lower bottom surface of the liquid distribution groove, and the riser is fixed by welding.

[0010] Preferably, the support disc is a circular ring-shaped plate with a center hole and a threaded hole, the top of the riser penetrates the center hole and is welded with the support disc, and the threaded hole is used for fixing the liquid baffle.

[0011] Preferably, the number of liquid baffles is determined according to the properties of the liquid and gas of the packed tower: When the flow is large, the number of liquid baffles is increased; when the flow is small, the number of liquid baffles is reduced.

[0012] Preferably, the diameter of the liquid baffle is 1.2-2.0 times the diameter of the riser; when there are multiple layers of liquid baffles, the spacing between each layer of liquid baffles is 0.3-0.5 times the diameter of the liquid baffle.

[0013] In the second aspect, the application discloses a use method of the hole flow tray type liquid distributor suitable for complex working conditions or media, which comprises: increasing or reducing the number of liquid baffles according to the properties of the liquid and gas of the packed tower, increasing the number of liquid baffles when the flow is large, and reducing the number of liquid baffles when the flow is small. The liquid enters the tower from the circulating liquid inlet in the tower, flows to the hole flow tray type liquid distributor, and is distributed to the packing from the liquid distribution hole; The gas enters the tower from the gas inlet in the tower, flows to the top of the tower through the hole flow tray type liquid distributor, and the liquid baffles separate the gas and the liquid.

[0014] Compared with the prior art, the application has the following beneficial effects: The hole flow tray type liquid distributor suitable for complex working conditions or media disclosed by the application can adjust the height and number of liquid baffles according to the actual working conditions to adapt to the flow fluctuation, avoid liquid entrainment when the flow is large or sparse distribution when the flow is small, and improve the liquid distribution uniformity; for different viscosity and solid content media, changing the shape and height can reduce adhesion accumulation and blockage; flexible adjustment of the number, height and shape can balance the energy consumption and separation efficiency, reduce the resistance or strengthen the interception; the detachable design also facilitates the cleaning of crystals and particles, and can adapt to multiple process scenes without replacing the overall structure, thereby greatly improving the adaptability and economy of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 is a front view structural schematic diagram of the embodiment of the present application; Figure 2 is a top view structural schematic diagram of the embodiment of the present application; Figure 3 is a sectional view of the liquid blocking plate part of the riser of the embodiment of the present application; Figure 4 is a support plate stud nut arrangement diagram of the embodiment of the present application.

[0017] In the figure, 1 is a liquid distribution groove 1; 2 is a riser; 3 is a liquid blocking plate; 301 is a first liquid blocking plate; 302 is a second liquid blocking plate; 303 is a third liquid blocking plate; 4 is a support disc; 5 is a stud; 6 is a nut; 7 is a liquid distribution hole; 8 is a tower inner wall. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art on the basis of the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0020] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1-4 This application discloses a perforated plate type liquid distributor suitable for complex working conditions or media, including a liquid distribution tank 1. The bottom of the liquid distribution tank 1 is evenly distributed with a number of air risers 2 and liquid distribution holes 7, and the liquid distribution holes 7 are evenly arranged around each air riser 2. A support plate 4 is provided on the air riser 2, and a number of baffles 3 are detachably provided on the support plate 4. By setting the detachable baffles 3, the height and number can be adjusted to adapt to flow fluctuations, avoid liquid entrainment at high flow rates or sparse distribution at low flow rates, and improve the uniformity of liquid distribution. For media with different viscosities and solid contents, changing the shape and height can reduce adhesion and blockage. Flexible adjustment of the number, height and shape can balance energy consumption and separation efficiency, reduce resistance or enhance interception. The detachable design also facilitates the cleaning of crystals and particles, and can be adapted to multiple process scenarios without replacing the overall structure, greatly improving the adaptability and economy of the equipment.

[0025] In some embodiments, see Figure 3A perforated liquid distributor suitable for complex working conditions or media is disclosed. The distributor comprises a distribution tank 1, a riser pipe 2, baffle plates 3, a support plate 4, studs 5, and nuts 6. The distribution tank 1 is an open cylindrical tank with a plurality of evenly distributed distribution holes 7 on the perforated plate at the bottom. The riser pipe 2 extends vertically through the entire perforated plate, extending above the distribution holes 7. Single or multiple baffle plates 3 are installed on the top of the riser pipe 2. The third baffle plate 303 is connected to the riser pipe 2, and the second baffle plate 302 is connected to the first baffle plate 301 via studs 5 and nuts 6. This allows for adjustment of the height, number, and shape of the baffle plates 3, overcoming the limitations of fixed structures. It is suitable for enhancing gas-liquid separation through staged interception of media with different properties. Through "dynamic adaptation," the equipment maintains efficient and stable operation under different working conditions, media, and loads, significantly improving its adaptability, operating efficiency, and operational flexibility.

[0026] In some embodiments, a support plate 4 is welded above the riser pipe 2, and several baffle plates 3 are detachably connected to the support plate 4 via studs 5 and nuts 6. Threaded holes are evenly distributed on the support plate 4 and the baffle plates 3. (See also...) Figure 4 There are three threaded holes, evenly distributed around the center on the support plate 4 and the baffle plate 3. The threaded holes are used for assembly with the studs 5, and the nuts 6 are used for fixing. The stud-nut structure allows the height of the baffle plate 3 to be adjusted according to different needs. If blockage occurs, it can be quickly disassembled and cleaned separately without disassembling the entire distributor.

[0027] In some embodiments, among the plurality of liquid baffles 3, the outermost liquid baffle 3 is a disc, the inner liquid baffles 3 are flat discs with a central opening, and the diameter of the central opening decreases from top to bottom.

[0028] In some embodiments, the liquid distribution tank 1 is an open cylinder welded from a perforated flow plate and an outer cylinder, and there is a gap of 10 to 50 mm between the liquid distribution tank 1 and the inner wall 8 of the tower.

[0029] In some embodiments, the height ratio of the outer cylinder to the riser pipe 2 is 1.1 to 1.5:1.

[0030] In some embodiments, the bottom of the liquid distribution tank 1 is evenly provided with a plurality of gas riser holes, and the gas riser 3 is inserted into the gas riser hole through the perforated flow plate 1. The gas riser 3 is a gas phase channel of the packed tower. The gas riser 3 has a hollow structure and a circular cross-section. The lower end of the gas riser 3 is flush with the bottom surface of the liquid distribution tank 1 and is fixed by welding.

[0031] In some embodiments, the support plate 4 is an annular plate with a central hole and a threaded hole. The top of the air riser 2 passes through the central hole and is welded to the support plate 4. The threaded hole is used to fix the baffle plate 3.

[0032] In some embodiments, the number of baffles 3 is determined according to the properties of the liquid and gas in the packed tower: Increase the number of baffles 3 when the flow rate is high; decrease the number of baffles 3 when the flow rate is low.

[0033] In some embodiments, the diameter of the baffle plate 3 is 1.2 to 2.0 times the diameter of the riser pipe 2; when there are multiple baffle plates 3, the spacing between each baffle plate 3 is 0.3 to 0.5 times the diameter of the baffle plate 3.

[0034] This application also discloses a method for using a perforated flow disc type liquid distributor suitable for complex working conditions or media, which involves increasing or decreasing the number of baffles 3 according to the liquid and gas properties of the packed tower; increasing the number of baffles 3 for high flow rates and decreasing the number of baffles 3 for low flow rates; including: Liquid enters the tower from the circulating liquid inlet and flows to the perforated liquid distributor, where it is distributed onto the packing from the distribution holes 9. Gas enters the tower from the bottom inlet and flows to the top of the tower through the riser pipe 3 as it passes through the perforated liquid distributor. The baffle plate 3 performs gas-liquid separation.

[0035]

Example 1

[0036] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A liquid distributor with an adjustable baffle plate 3 and a perforated flow plate type includes: a liquid distribution tank 1, a riser pipe 2, a baffle plate 3, a support plate 4, a stud 5, and a nut 6. The liquid distribution tank 1 is an open cylindrical tank. The riser pipe 2 and liquid distribution holes 7 are evenly distributed on the perforated flow plate of the base of the liquid distribution tank 1. The support plate 4 is welded above the riser pipe 2 for connecting the baffle plate 3. The riser pipe 2 serves as a gas phase channel, and the liquid distribution holes 7 serve as a liquid phase channel.

[0037] The thickness of the liquid distribution tank 1 needs to be determined comprehensively based on the working conditions, material properties, and structural strength requirements. The gap between the cylinder of the liquid distribution tank 1 and the inner wall 8 of the tower mainly serves as an auxiliary channel for gas flow and to balance the gas pressure inside the tower. It is generally recommended that this gap be controlled within the range of 10-50 mm. The specific gap width needs to be matched with the total cross-sectional area of ​​the riser pipe 2 to ensure that the total gas flow area of ​​both meets the gas flow requirements inside the tower. The height of the liquid distribution tank 1 needs to be determined comprehensively based on liquid residence time, liquid level stability, overflow prevention, and coordination with the riser pipe 2. The core is to ensure that the liquid flows out of the distribution holes 7 evenly while avoiding gas phase disturbance affecting the liquid level. Typically, the cylinder height is designed to be 100-300 mm.

[0038] The liquid distribution holes 7 are evenly distributed on the base of the liquid distribution tank 1 and must be evenly arranged around each riser pipe 2. The number of liquid distribution holes 7 should be determined comprehensively based on the uniformity of liquid distribution, combined with the tower diameter, packing type, liquid flow rate, and the flow capacity of a single liquid distribution hole 7. The liquid distribution holes 7 must be machined to ensure diameter accuracy and burr-free edges.

[0039] The riser pipes 2 are evenly distributed on the perforated plate, and are hollow with a circular cross-section. Gas rises from the riser pipes 2. The riser pipes 2 are inserted into the riser pipe holes, and the height of the riser pipes 2 must be higher than that of the liquid distribution holes 7. The number and size of the riser pipes 2 must be determined comprehensively based on the tower diameter, production load, gas flow rate, flow area of ​​a single riser pipe 2, and the space available for the liquid distribution holes 7.

[0040] The height ratio of the outer cylinder to the riser pipe 2 is controlled within the range of 1.1 to 1.5:1.

[0041] The upper end of the riser pipe 2 is inserted into the central hole of the support plate and welded thereto. The support plate is an annular flat plate with a central hole and threaded holes. Each riser pipe 2 has a baffle plate 3 above it. The number and shape of the baffle plates 3 need to be determined according to the properties of the liquid and gas in the packed tower. For high flow rates, the number of baffle plates 3 is increased to refine the liquid distribution through multi-layer diversion; for low flow rates, the number is reduced to avoid uneven distribution caused by excessive interception. The diameter of the baffle plate 3 is 1.2 to 2.0 times the diameter of the riser pipe 2. If the gas phase velocity is high and the droplet size is large, the plate diameter needs to be at the upper limit. When there are multiple baffle plates 3, the spacing between each layer of baffle plates 3 is 0.3 to 0.5 times the diameter of the baffle plate 3. The baffle plates 3 also need to have threaded holes. The threaded holes of the support plate and the baffle plates 3 are used for assembly with studs 5, and nuts 6 are used for fixing. The structure of studs 5 and nuts 6 can adjust the height of the baffle plates 3 according to different needs. If blockage occurs, it can be quickly disassembled and cleaned separately without disassembling the entire distributor.

[0042]

Example 2

[0043] In this embodiment, the packed tower has an inner diameter of 800 mm. Liquid enters the tower from the circulating liquid inlet and flows to the distributor, then into the liquid distribution trough 1, which is formed by welding a perforated flow plate and an outer cylinder. The liquid is then distributed onto the packing through the distribution holes. The liquid distribution trough 1 has a thickness of 8 mm, a height of 250 mm, and an outer diameter of 760 mm.

[0044] The base of the liquid distribution tank 1 is equipped with an air riser pipe 2 and liquid distribution holes. One optimal arrangement is to set four liquid distribution holes with a diameter of 10 mm at the intersection of the horizontal center line and the vertical center line of the base at 32.5 mm on both sides. Then, these four liquid distribution holes are arranged horizontally or vertically to fill the entire base, ensuring that the horizontal and vertical center distance of each liquid distribution hole is 65 mm. The base of this embodiment 1 can be equipped with a maximum of 96 liquid distribution holes.

[0045] To ensure that the liquid distribution holes are evenly distributed around the air riser 2, a 50 mm diameter air riser hole and an air riser 2 with an outer diameter of 48.3 mm and a wall thickness of 1 mm are set at the intersection of the centers of every four liquid distribution holes. The air riser 2 passes through the air riser hole and is welded to the base of the liquid distribution tank 1. The first air riser is located at the intersection of the horizontal center line above and the vertical center line to the left of the base. The air riser holes are then distributed throughout the base according to the above pattern, ensuring that the horizontal and vertical center distance of each air riser hole is 130 mm. In this embodiment, the base of the liquid distribution tank 1 can be equipped with a maximum of 26 air riser holes and air risers.

[0046] Gas enters the tower from the bottom inlet and flows to the top of the tower via the distributor and riser pipe 2. The riser pipe 2 is cylindrical and has a height of 150 mm.

[0047] The upper end of the riser pipe is welded to the annular support plate. The annular support plate has an outer diameter of 70 mm, a central hole diameter of 50 mm, and a thickness of 5 mm. Three threaded holes are evenly opened on the φ60 diameter circle of the annular support plate.

[0048] This embodiment features three layers of baffles ①②③. The outer baffle ①, the first layer, is a 5 mm thick, 70 mm diameter disc, positioned above the liquid distribution trough 1. The middle baffle ②, the second layer, is a 5 mm thick, 70 mm diameter, centrally perforated flat plate with a 40 mm diameter hole. The bottom baffle ③, the third layer, is a 5 mm thick, 70 mm diameter, centrally perforated flat plate with a 20 mm diameter hole. The spacing between each baffle layer is 35 mm. The support plate 4 and the baffles ①②③ all have M5 threaded holes on a φ60 diameter circle for assembly with M5 studs 5, which are 140 mm long.

[0049] It should be noted that the orifice-disc liquid distributor of the present invention can not only adapt to flow fluctuations by adjusting the height and number, avoid liquid entrainment or sparse distribution, and improve uniformity; it can also change the shape and height to reduce the adhesion and blockage of different media. The detachable design makes it easy to clean and can be adapted to multiple processes without replacing the overall structure, which greatly improves the adaptability and economy of the equipment.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present 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 perforated flow-plate liquid distributor suitable for complex service or media, characterized in that, It includes cloth liquid groove (1), cloth liquid groove (1) bottom even has several lift gas pipe (2) and cloth liquid hole (7), and cloth liquid hole (7) evenly arranged around every lift gas pipe (2), lift gas pipe (2) is provided with support disc (4), support disc (4) is detachably provided with several layers of liquid baffle (3) on it.

2. A perforated tray liquid distributor suitable for complex operating conditions or media according to claim 1, characterized in that, The support disc (4) is welded on the top of the lift gas pipe (2), and the several liquid baffles (3) are detachably connected with the support disc (4) through the stud (5) and the nut (6). The support disc (4) and the liquid baffles (3) are respectively and evenly provided with threaded holes.

3. A perforated tray liquid distributor suitable for complex operating conditions or media as claimed in claim 1, wherein, Among the several layers of liquid baffles (3), the outermost liquid baffle (3) is a disc, and the inner liquid baffles (3) are center-holed circular plates with decreasing hole diameters from top to bottom.

4. A perforated tray liquid distributor suitable for complex service or media according to claim 1, wherein, The cloth liquid groove (1) is a coverless cylinder welded by a hole flow disc and an outer cylinder, and there is a gap of 10-50 mm between the cloth liquid groove (1) and the tower inner wall (8).

5. A perforated plate liquid distributor suitable for complex operating conditions or media according to claim 4, characterized in that, The height ratio of the outer cylinder to the lift gas pipe (2) is 1.1-1.5:

1.

6. A perforated tray liquid distributor suitable for complex service or media according to claim 1, wherein, The bottom of the cloth liquid groove (1) is evenly provided with several lift gas pipe holes, the lift gas pipe (3) penetrates the hole flow disc (1) by being inserted into the lift gas pipe hole, the lift gas pipe (3) is a gas phase passage of the packed tower, the lift gas pipe (3) has a hollow structure and a circular cross section, the lower end of the lift gas pipe (3) is flush with the lower bottom surface of the cloth liquid groove (1), and the lift gas pipe (3) is fixed by welding.

7. A perforated tray liquid distributor suitable for complex service or media according to claim 1 wherein, The support disc (4) is a circular ring-shaped plate with a center hole and threaded holes, the top of the lift gas pipe (2) penetrates the center hole and is welded with the support disc (4), and the threaded holes are used for fixing the liquid baffles (3).

8. A perforated plate liquid distributor suitable for complex operating conditions or media according to claim 1, characterized in that, The number of liquid baffles (3) is determined according to the properties of liquid and gas in the packed tower: When the flow is large, the number of liquid baffles (3) is increased; when the flow is small, the number of liquid baffles (3) is reduced.

9. A perforated plate liquid distributor suitable for complex operating conditions or media according to claim 1, characterized in that, The diameter of the liquid baffle (3) is 1.2-2.0 times the diameter of the lift gas pipe (2); when there are multiple layers of liquid baffles (3), the spacing between each layer of liquid baffles (3) is 0.3-0.5 times the diameter of the liquid baffle (3).

10. A method of using the orifice flow tray liquid distributor suitable for complex service or media as claimed in any one of claims 1 to 9, wherein, According to the properties of liquid and gas in the packed tower, the number of liquid baffles (3) is increased or decreased, the number of liquid baffles (3) is increased when the flow is large, and the number of liquid baffles (3) is reduced when the flow is small. The liquid enters the tower from the circulating liquid inlet in the tower, flows to the hole flow disc liquid distributor, and is distributed to the packing through the cloth liquid hole (9); The gas enters the tower from the tower pot gas inlet, flows to the hole flow disc liquid distributor, and flows to the top of the tower through the lift gas pipe (3), and the liquid baffles (3) separate the gas and liquid.

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