CN219168443U - Liquid distributor of packed tower - Google Patents

Abstract

The utility model relates to a liquid distributor of a packed tower, which comprises a primary tank, a buffer distribution plate A, a liquid guide tank, a buffer distribution plate B, a secondary tank and distribution points; the bottom of the primary tank is vertically provided with a plurality of secondary tanks and a plurality of liquid guide tanks, and a liquid guide tank matched with each secondary tank is arranged at the corresponding position of each secondary tank at the bottom of the primary tank; the inside of the primary tank is provided with a buffer distribution plate A, the inside of the secondary tank is provided with a buffer distribution plate B, the upper end of the liquid guide tank is inserted into the primary tank, and the lower end of the liquid guide tank is inserted into the secondary tank; the secondary grooves are uniformly arranged into a circular structure along the section of the tower body; distribution points are arranged on the secondary tank; the primary groove and the secondary groove are of special structures with wide upper part and narrow lower part. According to the liquid distributor of the packed tower, the liquid holdup of the primary tank can be reduced by 40-45%, and the liquid holdup of the secondary tank can be reduced by 65-70%.

Description

Liquid distributor of packed tower

Technical Field

The utility model relates to a component of gas-liquid mass transfer separation equipment, in particular to a liquid distributor of a packed tower.

Background

In the gas-liquid mass transfer separation equipment of chemical engineering, a packing tower takes regular packing or bulk packing as a basic operation unit for gas-liquid contact and mass transfer, liquid flows from top to bottom in a liquid film shape on the surface of the packing, gas flows in a continuous phase from bottom to top in a reverse direction with the liquid, and mass transfer and heat transfer between two phases of gas and liquid are carried out in the process of gas-liquid contact.

The liquid distributor is a core key component of the packed tower, and forms a separation internal component of the packed tower together with the packing, the liquid collector and the packing bed limiter; the core function of the tower internals is to allow a uniform contact of the gas and liquid, so that the packing achieves the best separation performance. The level of design, manufacture, and installation of the internals directly affects the performance of the packing separation and the realization of the separation effect. In the operation of the packed tower, the liquid distribution has the greatest influence on the performance of the packed tower, and the working state of the packed tower directly determines the separation effect of the packed tower. In some separation systems for high value-added materials, it is often desirable to minimize the liquid hold-up in the column, while requiring the distributor to operate with as much elasticity as possible and with a more uniform distribution effect.

Disclosure of Invention

Based on this, it is necessary to provide a packed tower liquid distributor with low liquid holdup, high operation flexibility and uniformity in the separation process of chemical engineering to solve the existing practical separation engineering needs.

In order to achieve the above object, the present utility model provides the following technical solutions:

a liquid distributor of a packed tower comprises a primary tank, a buffer distribution plate A, a liquid guide tank, a buffer distribution plate B, a secondary tank and distribution points; the bottom of the primary tank is vertically provided with a plurality of secondary tanks and a plurality of liquid guide tanks, and a liquid guide tank matched with each secondary tank is arranged at the corresponding position of each secondary tank at the bottom of the primary tank; the inside of the primary tank is provided with a buffer distribution plate A, the inside of the secondary tank is provided with a buffer distribution plate B, the upper end of the liquid guide tank is inserted into the primary tank, and the lower end of the liquid guide tank is inserted into the secondary tank; the secondary grooves are uniformly arranged into a circular structure along the section of the tower body; distribution points are arranged on the secondary tank; the primary groove and the secondary groove are of special structures with wide upper part and narrow lower part.

The liquid distributor of the packing tower adopts a narrow groove structure in most areas needing liquid level to greatly reduce liquid holdup, and properly widens the groove width in shorter areas needing liquid level communication to ensure liquid flow, compared with the prior liquid distributor of the packing tower, the liquid distributor of the packing tower can reduce liquid holdup by 40-45% in a first-stage groove and 65-70% in a second-stage groove.

Preferably, the upper part of the primary groove has a width of 200mm, the lower part of the primary groove has a width of 100mm, and the height of 240mm; the upper width of the secondary groove is 40mm, the lower width of the secondary groove is 20mm, the height of the secondary groove is 240mm, and the distance between the secondary grooves is 260-360 mm.

Further, the liquid distributor of the packed tower further comprises a cover plate, wherein the cover plate is connected above the primary groove, and a liquid inlet is formed in the cover plate; the buffer distribution plate A is positioned below the cover plate; the upper end of the liquid guide groove is positioned below the buffer distribution plate A; the lower end of the liquid guide groove is positioned above the buffer distribution plate B.

Further, a horizontal adjusting device is arranged between the primary tank and the secondary tank and is used for adjusting the levelness of the liquid distributor of the packed tower.

Further, the horizontal adjusting device comprises a limit channel steel welded at the relative positions of the primary groove and the secondary groove, a nut welded at the lower part of the limit channel steel, a double nut used for limiting the upper part of the limit channel steel, a long threaded stud matched with the nut at the lower part of the limit channel steel, a long threaded stud matched with the nut at the upper part of the limit channel steel, and a level.

Furthermore, initial distribution holes are formed in the side face and the bottom face of the buffer distribution plate A, strict distribution holes A are formed in the upper portion of the liquid guide groove, and overflow holes are formed in two sides of the upper portion of the secondary groove.

Further, a solid particle collecting device is arranged on the buffer distribution plate A, and the solid particle collecting device is cleaned and maintained regularly so as to ensure that the distributor runs stably in a constant period.

Furthermore, the liquid guide groove is provided with one row, two rows or three rows of strict distribution holes A according to the requirement of the liquid amount operation elasticity of the distributor so as to ensure the process requirement of 10-150% of the conventional operation elasticity.

In one embodiment, the liquid guide groove is provided with a row of strictly distributed holes A so as to ensure the process requirement of 50-120% of the conventional operation elasticity; the height of the strictly distributed holes A from the first-stage tank bottom plate is 30mm, and the height of the top of the liquid guide tank from the first-stage bottom plate is about 60-80 mm.

In one embodiment, the liquid guide groove is provided with two rows of strictly distributed holes A so as to ensure the process requirement of 10-150% of the conventional operation elasticity; the height of the strict distribution holes A from the first-stage tank bottom plate is 30mm, and the height of the top of the liquid guide tank from the first-stage bottom plate is about 60-80 mm; the first row of strict distribution holes A is 15mm away from the bottom plate of the primary tank, and the second row of strict distribution holes A is 60-90 mm away from the first row of strict distribution holes A.

Further, the distribution points comprise strictly distributed holes B and strictly distributed holes C; the positions of the blocking plates at the two ends of the secondary tank are additionally provided with strict distribution holes B, and the distribution holes which are due to annular gaps between the blocking plates and the tower wall are filled; and the circular gap position of the secondary groove is additionally provided with a strict distribution hole C, and the corresponding distribution holes in the corresponding area are supplemented.

In one embodiment, the side surface of the lower part of the secondary tank is provided with strictly distributed holes B; and a distribution pipe is arranged at the position of a strict distribution hole C on the side surface of the lower part of the secondary tank, and liquid passes through the strict distribution hole B and is uniformly distributed above a packed bed layer in the tower along the distribution pipe.

In one embodiment, the upper side surface of the secondary tank is positioned below the overflow hole, and the lower side surface of the secondary tank is provided with a strict distribution hole B; the upper side surface is positioned below the overflow holes, and the position of the strict distribution holes C on the lower side surface is provided with distribution pipes, and the liquid flowing through the strict distribution holes B is uniformly distributed above the packed bed layer along the distribution pipes according to the process requirement.

The beneficial technical effects of the utility model are as follows:

compared with the prior packed tower liquid distributor, the packed tower liquid distributor has the advantages that the liquid distributor has low liquid holdup, high operation elasticity and uniformity, the liquid holdup of the first-stage tank can be reduced by 40-45%, and the liquid holdup of the second-stage tank can be reduced by 65-70%.

Drawings

FIG. 1 is a front view of a prior art packed column liquid distributor;

FIG. 2 is a top view of a prior art packed column liquid distributor;

FIG. 3 is a front view of a packed column liquid distributor of the present utility model;

FIG. 4 is a top view of a packed column liquid distributor according to the present utility model;

FIG. 5 is a schematic diagram of the primary tank structure of example 1;

FIG. 6 is a schematic diagram of a secondary tank structure of embodiment 1;

FIG. 7 is a schematic diagram of the primary tank structure of example 2;

FIG. 8 is a schematic diagram of a secondary tank structure of embodiment 3;

fig. 9 is a schematic view of a horizontal adjustment device.

In the figure, 1, a primary groove; 2. a buffer distribution plate A; 3. a liquid guiding groove; 4. a buffer distribution plate B; 5. a secondary tank; 6. a cover plate; 7. a level adjustment device; 8. distributing points; 21. initially distributing holes; 31. strictly distributing holes A; 51. an overflow aperture; 52. strictly distributing holes B; 53. a distribution pipe; 54. strictly distributing holes C; 71. limiting channel steel; 72. a nut A; 73. a nut B; 74. a long thread stud.

Detailed Description

In the description of the present utility model, it should be understood that the terms "left", "right", "above", "below", "outside", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-2, the conventional liquid distributor of the packed tower comprises a primary tank, a buffer distribution plate, a liquid guide tank, a secondary tank distribution point, a cover plate and a horizontal adjusting device.

The primary tank is a cuboid tank, a cover plate is connected above the primary tank, and a liquid inlet is formed in the cover plate. The cover plate is connected to the primary tank top, avoids getting into the liquid spill in primary tank, guarantees that liquid gets into the secondary tank completely and distributes.

The bottom of one-level groove corresponds the second grade groove position and is provided with a plurality of liquid guide tanks, and one-level inslot liquid passes through the liquid guide tank and gets into the second grade groove, one-level inslot inside apron below is equipped with the buffering distribution board, the liquid guide tank sets up in one-level inslot buffering distribution board below, the lower extreme of liquid guide tank inserts in the second grade groove.

The bottom of the buffering distribution plate is provided with initial distribution holes, and the upper part of the liquid guide groove is provided with strict distribution holes.

Distribution points are arranged on the secondary tank and are arranged on two side surfaces of the bottom of the secondary tank, each distribution point adopts a corresponding liquid guide buckling angle, and drainage liquid is directly distributed above the packed bed.

The lengths of the secondary grooves are different and are arranged side by side, and the secondary grooves are uniformly arranged into a circular structure along the section of the tower body.

A horizontal adjusting device is arranged between the primary groove and the secondary groove, limiting channel steel is welded at the relative position of the primary groove and the secondary groove of the distributor, nuts are welded at the lower channel steel position, and double nuts are adopted for limiting at the upper position; under the condition of an auxiliary level meter, the levelness of the primary groove is adjusted by adjusting the positioning distance of the long-thread stud; the horizontal adjusting device is used for adjusting the levelness of the liquid distributor of the packed tower; when the levelness of the liquid distributor of the packed tower is regulated, the levelness of the primary tank is preferentially ensured, and then the levelness of the secondary tank is regulated.

The working process of the existing packed tower liquid distributor is as follows: after the level of the liquid distributor of the packed tower is regulated by the level regulating device, liquid is fed into the first-stage tank of the distributor from a liquid inlet on the cover plate through a return pipe or a collector liquid-lowering guide pipe, and flows into the upper part of the buffer distribution plate firstly, then flows into each liquid guide tank through the initial distribution holes on the buffer distribution plate, flows into the second-stage tank through the strict distribution holes on the upper part of the liquid guide tank, and finally is uniformly distributed on the packed bed layer of the rectifying tower through the distribution points on the second-stage tank. According to the distribution requirements of low liquid holdup, high operation elasticity and uniformity of high added value materials separated in chemical engineering, the utility model provides a liquid distributor of a packing tower, which has low liquid holdup, high operation elasticity and uniformity.

The utility model is described in further detail below with reference to the drawings and examples.

Example 1

Referring to fig. 3 and 4, according to the distribution requirements of low liquid holdup, high operation elasticity and uniformity required by high added value materials separated in chemical engineering, the utility model provides a packing tower liquid distributor with low liquid holdup, high operation elasticity and uniformity, which comprises a primary tank 1, a buffer distribution plate A2, a liquid guide tank 3, a buffer distribution plate B4, a secondary tank 5, a cover plate 6, a level adjusting device 7 and distribution points 8.

The upper part of the primary tank 1 is connected with a cover plate 6, and a liquid inlet is formed in the cover plate 6. The cover plate 6 is connected to the primary tank 1 top, avoids getting into the liquid spill of primary tank 1, guarantees that liquid gets into the secondary tank 5 completely and distributes.

The bottom of the primary tank 1 is vertically provided with a plurality of secondary tanks 5 and a plurality of liquid guide tanks 3, and the corresponding position of each secondary tank 5 at the bottom of the primary tank 1 is provided with a liquid guide tank 3 matched with the secondary tank 5.

The buffer distribution plate A2 is arranged below the cover plate 6 inside the primary tank 1, the buffer distribution plate B4 is arranged inside the secondary tank 5, the upper end of the liquid guide tank 3 is inserted below the buffer distribution plate A2 inside the primary tank 1, and the lower end of the liquid guide tank 3 is inserted into the secondary tank 5. The liquid in the primary tank 1 enters the secondary tank 5 through the liquid guide tank 3.

The secondary grooves 5 are uniformly arranged along the section of the tower body to form a circular structure.

Distribution points 8 are formed on the secondary tank 5. The distribution points 8 of the secondary tank 5 are arranged according to the process, and the liquid flowing through the strict distribution holes on the secondary tank 5 is uniformly distributed above the packed bed layer according to the process requirement by adopting the distribution pipes 53 through the strict distribution holes on the secondary tank 5.

The primary tank 1 and the secondary tank 5 are of special-shaped structures with wide upper part and narrow lower part, a narrow tank structure is adopted in most areas needing liquid level to greatly reduce liquid holdup, and the tank width is properly widened in shorter areas needing liquid level communication to ensure the flow of liquid.

According to the actual liquid flow, the overflow intensity of the liquid is controlled through process calculation, the upper and lower widths and heights of the first-stage tank 1 and the second-stage tank 5 of the distributor are optimized, the number of the second-stage tanks 5 is set on the premise that distribution points are completely uniform, and the liquid holdup of the liquid is systematically reduced. Under the conventional condition, the upper part of the primary tank 1 has a width of 200mm, the lower part has a width of 100mm and the height of 240mm; the upper width of the secondary tank 5 is 40mm, the lower width is 20mm, and the height is 240mm. The distance between the two-stage grooves 5 is 260-360 mm, and the two-stage grooves are uniformly arranged in the tower according to the actual tower body size.

Referring to fig. 9, a level adjusting device 7 is installed between the primary tank 1 and the secondary tank 5, the level adjusting device 7 includes a limit channel steel 71 welded at the relative positions of the primary tank 1 and the secondary tank 5, a nut a 72 welded at the lower part of the limit channel steel 71, a nut B73 used for limiting the upper part of the limit channel steel 71, a long threaded stud 74 with the upper part matched with the nut a 72 and the lower part matched with the nut B73, and a level gauge.

The levelness of the liquid distributor of the packed tower is regulated by the level regulating device 7, and the method comprises the following steps:

1. the upper part of a long threaded stud 74 is in threaded connection with a nut B73, and the levelness of the primary groove 1 is adjusted by adjusting the positioning distance of the long threaded stud 74 under the assistance of a level gauge;

2. the lower part of the long threaded stud 74 is in threaded connection with the nut A72, and the levelness of the secondary groove 5 is adjusted by adjusting the positioning distance of the long threaded stud 74 with the assistance of the level gauge.

When the levelness of the liquid distributor of the packed tower is regulated, the levelness of the primary tank 1 is preferentially ensured, and then the levelness of the secondary tank 5 is regulated.

Referring to fig. 5 and 6, the side surfaces and the bottom surface of the buffer distribution plate A2 are both provided with initial distribution holes 21, the upper portion of the liquid guiding groove 3 is provided with strict distribution holes a 31, two sides of the upper portion of the secondary groove 5 are provided with overflow holes 51, the side surface of the lower portion of the secondary groove 5 is provided with strict distribution holes B52 and strict distribution holes C54, the side surface of the lower portion of the secondary groove 5 is provided with a distribution pipe 53 at the position of the strict distribution holes C54, and the liquid is uniformly distributed above the packed bed layer in the tower along the distribution pipe 53 through the strict distribution holes B52.

According to the possibility that the materials possibly carry solid particles, a solid particle collecting device is arranged on the buffer distribution plate A2, and the solid particle collecting device is cleaned and maintained regularly so as to ensure that the distributor runs stably in a constant period.

The liquid guide groove 3 can be provided with a row of strictly distributed holes A31 according to the requirement of operation elasticity so as to ensure the process requirement of 50-120% of the conventional operation elasticity. The operation elasticity of the distributor is determined by setting the position of the distribution point and calculating the height of the potential difference, and for the working condition requiring high operation elasticity, the operation elasticity can be improved by setting two or three rows of strict distribution holes. In the embodiment, the height of the strict distribution holes A31 from the bottom plate of the primary tank 1 is 30mm, the height of the top of the liquid guide tank 3 from the bottom plate of the primary tank is about 60-80 mm, and the specific value of the height is set according to the overflow strength of the liquid.

The distribution points 8 include strictly distributed holes B52 and strictly distributed holes C54.

And the positions of the blocking plates at the two ends of the secondary tank 5 are additionally provided with strict distribution holes B52 for supplementing the distribution holes which are due to the annular gap between the blocking plates and the tower wall. And a plurality of strict distribution holes B52 are formed in equal height positions of the two end blocking plates of the secondary tank 5 and the strict distribution holes B53, the number of the strict distribution holes B52 is determined according to the annular space area between the two end blocking plates of the secondary tank 5 and the tower wall, and liquid flows out through the strict distribution holes B52 and is sprayed onto a baffle plate arranged outside the blocking plates and is distributed above the packed bed along the baffle plate.

And strict distribution holes C54 are additionally formed in the round defect position of the secondary groove 5, and the corresponding distribution holes in the corresponding area are supplemented. The strict distribution holes C54 are additionally arranged in the middle of the original distribution holes at the round defect positions of the secondary tank 5, the number of the strict distribution holes C54 is determined according to the round defect areas of the secondary tank 5, and liquid passes through the additionally-arranged strict distribution holes C54 and is uniformly distributed above the packed bed along the positions where the liquid guide pipes 53 are arranged.

The liquid distributor of the packed tower of the embodiment can reduce the liquid holdup by about 40% compared with the primary tank 1 of the conventional liquid distributor of the packed tower.

The packing tower liquid distributor of this embodiment reduces the quantity setting of second grade groove 5 under the prerequisite of guaranteeing distribution point strict uniformity, compares conventional liquid distributor second grade groove 5, can reduce the liquid holdup about 65%.

Example 2:

referring to fig. 7, the liquid distributor of the packed tower of the present utility model is otherwise identical to that of example 1, except that the liquid guiding tank 3 is provided with two rows of strict distribution holes a 31 according to the operation elasticity requirement, so as to ensure the process requirement of 10-150% of the normal operation elasticity. The height of the strict distribution holes A31 from the bottom plate of the primary tank 1 is 30mm, the height of the top of the liquid guide tank 3 from the bottom plate of the primary tank is about 60-80 mm, and specific values of the height are set according to the overflow intensity of liquid. The relative height difference and the aperture of the two rows of strictly distributed holes A31 are determined by the liquid amount and the operation elasticity of the operation and are all adjustable in size. The first row of strict distribution holes A31 is 15mm away from the bottom plate of the primary tank 1, the second row of strict distribution holes A31 is 60-90 mm away from the first row of strict distribution holes A31, and the specific value of the height is set according to the overflow intensity of liquid.

The liquid distributor of the packed tower of the embodiment can reduce the liquid holdup by about 42% compared with the primary tank 1 of the conventional liquid distributor of the packed tower.

The packing tower liquid distributor of this embodiment reduces the quantity setting of secondary tank 55 under the prerequisite of guaranteeing distribution point strict uniformity, compares conventional liquid distributor secondary tank 5, can reduce the liquid holdup about 67%.

Example 3:

referring to fig. 8, the liquid distributor of the packed tower of the present utility model is otherwise the same as that of embodiment 1, except that two sides of the upper portion of the secondary tank 5 are provided with overflow holes 51, and the upper side surface of the secondary tank 5 is located below the overflow holes 51 and the lower side surface of the secondary tank 5 is provided with strict distribution holes B52; the upper side is positioned below the overflow holes 51, and the lower side is provided with a distribution pipe 53 at the position of a strict distribution hole C54, and the liquid flowing through the strict distribution hole B52 is uniformly distributed above the packed bed layer along the distribution pipe 53 according to the process requirement.

The liquid distributor of the packed tower of the embodiment can reduce the liquid holdup by about 45% compared with the primary tank 1 of the conventional liquid distributor of the packed tower.

The packing tower liquid distributor of this embodiment reduces the quantity setting of secondary tank 55 under the prerequisite of guaranteeing distribution point strict uniformity, compares conventional liquid distributor secondary tank 5, can reduce the liquid holdup about 70%.

In the embodiment, the initial distribution holes 21 are openings of initial diversion liquid formed in the buffer distribution plate 2 and are positioned in the primary tank 1, and the main purpose of the initial distribution holes is to primarily distribute most of the liquid to the corresponding liquid guide tank 3 and the corresponding positions of the strict distribution holes a 31 on the liquid guide tank according to the process requirements, and then to distribute the liquid to the corresponding secondary tanks 5 through the strict distribution holes, so that the initial distribution and buffer effects of the liquid are achieved.

In the embodiment, the strictly distributed holes are all distributed holes which are formed in corresponding areas and positions according to the process requirements and are strictly calculated by the process and accurately positioned, and are called strictly distributed holes relative to the initial distribution.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (13)

1. The liquid distributor of the packed tower is characterized by comprising a primary tank (1), a buffer distribution plate A (2), a liquid guide tank (3), a buffer distribution plate B (4), a secondary tank (5) and distribution points (8); a plurality of secondary grooves (5) and a plurality of liquid guide grooves (3) are vertically arranged at the bottom of the primary groove (1), and a liquid guide groove (3) matched with each secondary groove (5) is arranged at the corresponding position of each secondary groove (5) at the bottom of the primary groove (1); the device is characterized in that a buffer distribution plate A (2) is arranged in the primary tank (1), a buffer distribution plate B (4) is arranged in the secondary tank (5), the upper end of the liquid guide tank (3) is inserted into the primary tank (1), and the lower end of the liquid guide tank (3) is inserted into the secondary tank (5); the secondary grooves (5) are uniformly arranged into a circular structure along the section of the tower body; distribution points (8) are formed on the secondary groove (5); the primary groove (1) and the secondary groove (5) are of special structures with wide upper part and narrow lower part.

2. The packed tower liquid distributor according to claim 1, wherein the side surface and the bottom surface of the buffer distribution plate a (2) are provided with initial distribution holes (21), the upper part of the liquid guiding groove (3) is provided with strict distribution holes a (31), and two sides of the upper part of the secondary groove (5) are provided with overflow holes (51).

3. The packed column liquid distributor according to claim 1, wherein solid particle collection means are provided on the buffer distribution plate a (2).

4. The packed tower liquid distributor according to claim 1, wherein the liquid guiding groove (3) is provided with one, two or three rows of strictly distributing holes a (31) according to the requirement of the operation elasticity of the liquid quantity of the distributor, so as to ensure the process requirement of 10-150% of the conventional operation elasticity.

5. The packed tower liquid distributor according to claim 4, wherein the liquid guiding tank (3) is provided with a row of strictly distributing holes a (31) to ensure the process requirement of 50-120% of the elasticity of the conventional operation; the height of the strictly distributed holes A (31) from the bottom plate of the primary tank (1) is 30mm, and the height of the top of the liquid guide tank (3) from the bottom plate of the primary tank is about 60-80 mm.

6. The packed tower liquid distributor according to claim 4, wherein the liquid guiding tank (3) is provided with two rows of strictly distributing holes a (31) to ensure the process requirement of 10-150% of the normal operation elasticity; the height of the strict distribution holes A (31) from the bottom plate of the primary tank (1) is 30mm, and the height of the top of the liquid guide tank (3) from the primary bottom plate is about 60-80 mm; the first row of strict distribution holes A (31) is 15mm away from the bottom plate of the primary tank (1), and the second row of strict distribution holes A (31) is 60-90 mm away from the first row of strict distribution holes A (31).

7. The packed column liquid distributor according to claim 1, wherein the distribution points (8) comprise strictly distributing holes B (52) and strictly distributing holes C (54); the positions of the blocking plates at the two ends of the secondary tank (5) are additionally provided with strict distribution holes B (52) for supplementing the distribution holes which are due to the annular gap between the two blocking plates and the tower wall; and strict distribution holes C (54) are additionally arranged at the circular defect position of the secondary groove (5), and the corresponding distribution holes in the corresponding area are supplemented.

8. The packed column liquid distributor according to claim 7, wherein the lower side of the secondary tank (5) is provided with strictly distributing holes B (52); and a distribution pipe (53) is arranged at the position of a strict distribution hole C (54) on the side surface of the lower part of the secondary tank (5), and liquid passes through the strict distribution hole B (52) and is uniformly distributed above a packed bed layer in the tower along the distribution pipe (53).

9. The packed tower liquid distributor according to claim 7, wherein the upper side of the secondary tank (5) is located below the overflow hole (51) and the lower side is provided with a strict distribution hole B (52); the upper side surface is positioned below the overflow hole (51) and the lower side surface is provided with a distribution pipe (53) at the position of a strict distribution hole C (54), and the liquid flowing through the strict distribution hole B (52) is uniformly distributed above the packed bed layer along the distribution pipe (53) according to the process requirement.

10. The packed tower liquid distributor according to any one of claims 1 to 8, further comprising a cover plate (6), wherein the cover plate (6) is connected above the primary tank (1), and a liquid inlet is formed in the cover plate (6); the buffer distribution plate A (2) is positioned below the cover plate (6); the upper end of the liquid guide groove (3) is positioned below the buffer distribution plate A (2); the lower end of the liquid guide groove (3) is positioned above the buffer distribution plate B (4).

11. Packed column liquid distributor according to any one of claims 1 to 8, characterized in that a level adjustment device (7) is installed between the primary tank (1) and the secondary tank (5).

12. The packed tower liquid distributor according to claim 11, wherein the level adjusting device (7) comprises a limit channel steel (71) welded at the relative positions of the primary tank (1) and the secondary tank (5), a nut A (72) welded at the lower part of the limit channel steel (71), a nut B (73) used for limiting at the upper part of the limit channel steel (71), a long threaded stud (74) with the upper part matched with the nut A (72) and the lower part matched with the nut B (73), and a level gauge.

13. The packed column liquid distributor according to any one of claims 1 to 8, wherein the primary tank (1) has an upper width of 200mm, a lower width of 100mm and a height of 240mm; the upper width of the secondary groove (5) is 40mm, the lower width of the secondary groove is 20mm, the height of the secondary groove is 240mm, and the distance between the secondary groove (5) is 260-360 mm.

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