A structured packing for a distillation column and method thereof

Abstract

The application discloses a kind of rectifying column anti-wall flow packing structure, simultaneously discloses a kind of rectifying column anti-wall flow packing structure and method thereof, it is related to anti-wall flow packing structure technical field, including rectifying column body, the inside of rectifying column body is respectively installed with first ring body and second ring body, the inside of first ring body and second ring body is filled with packing assembly. First packing layer and second packing layer are installed in the inside of first ring body and second ring body, and they need to be installed in opposite directions when being installed, first packing layer is installed, and an inclined notch is cut below it before installation, so that the notch is inclined to the center of first packing layer. When the liquid flows downward, it has not yet contacted the inner wall, and falls downward into the second packing layer. Because the flow channel on the second packing layer is inclined towards the center, the liquid will flow towards the center at this time, and the phenomenon of wall flow will be avoided as much as possible by contacting the inner wall, improving the overall practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-wall flow packing structure, in particular to a rectifying column anti-wall flow packing structure and method thereof. BACKGROUND

[0002] The catalytic rectifying process has both reaction and separation, so the packing in the column must have both catalytic function and gas-liquid mass transfer function, the product after the raw material is catalytically reacted in the column is separated, and the reaction is continuously promoted. The packing structure of the catalytic rectifying column directly affects the efficiency of the process, and the packing needs to ensure that the gas-liquid phases in the column are fully mixed and contacted, while the contact time range of the reactants and the catalyst is large and controllable.

[0003] Generally, the flow channel direction of the packing in the rectifying column is inclined downward, if the fluid always flows along the flow channel, the liquid will flow to the vicinity of the column wall, thereby forming a wall flow phenomenon, and the packing in the center cannot be well wetted, thereby forming a so-called "dry cone" abnormal phenomenon, which reduces the effective contact area of the gas-liquid two phases, and if no anti-wall flow measures are taken, there will be 10% to 40% of wall flow, which has more than 10% influence on the separation effect. Therefore, reducing or eliminating the wall flow effect has important significance for improving the separation and absorption capacity of the packing, and reducing the cost. SUMMARY

[0004] In order to improve the above-mentioned problems, the present application provides a rectifying column anti-wall flow packing structure and method thereof.

[0005] The present application provides a rectifying column anti-wall flow packing structure and method thereof, which adopts the following technical scheme: a rectifying column anti-wall flow packing structure, comprising a rectifying column body, a first ring body and a second ring body are installed in the rectifying column body respectively, the first ring body and the second ring body are the same structure, first guide plates and second guide plates are arranged at the upper and lower edges of the first ring body and the second ring body respectively, a support plate is arranged below the second guide plate, the support plate is fixed on the inner wall of the rectifying column body, a liquid distributor and a liquid redistributor are arranged above the two groups of first guide plates respectively, and packing assemblies are filled in the interiors of the first ring body and the second ring body.

[0006] The packing assembly comprises a first packing layer and a second packing layer arranged in two layers, and the first packing layer and the second packing layer are both provided with longitudinally inclined flow channels with equal intervals;

[0007] The first packing layer is cut with an inclined notch below, the first packing layer and the second packing layer are installed in opposite directions, the flow channels on the first packing layer are inclined to the inner wall of the side edge, the flow channels on the second packing layer are inclined to the center, the notch of the first packing layer is low in the middle and high on the outside, the notch is an acute angle, and the cutting angle is between 30 degrees and 60 degrees.

[0008] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the upper end of the rectifying tower body is provided with a gas outlet pipe, the bottom of the rectifying tower body is provided with a liquid outlet pipe, the upper end of one side of the rectifying tower body is connected with a liquid inlet pipe, the lower end of the other side of the rectifying tower body is connected with a gas inlet pipe, and the surface of the rectifying tower body is provided with an observation window.

[0009] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the first ring body and the second ring body are both hollow cylindrical structures, and the outer walls of the first ring body and the second ring body are provided with reinforcing ribs at intervals.

[0010] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the upper end of the first guide plate is folded outward to form a horn shape, and the lower end of the second guide plate is folded inward to form a funnel shape.

[0011] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the surface of the first guide plate is provided with a shear joint at intervals, the lower end of the first guide plate is connected with a guide plate, and the connection position of the guide plate and the first guide plate is folded inward to form an inclined shape.

[0012] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the upper end of the liquid redistributor is connected with a liquid collecting hopper.

[0013] As a preferred scheme of the anti-wall flow packing structure of the rectifying tower, the surface of the support plate is provided with a rectangular array of through holes.

[0014] Another technical scheme of the present application is a rectifying tower anti-wall flow packing structure and a method thereof, comprising the following steps:

[0015] Step one: before the first packing layer and the second packing layer are installed, a slanted cut is first cut below the first packing layer, so that the cut is slanted to the center of the first packing layer;

[0016] Step two: then the first packing layer and the second packing layer are installed, and they need to be installed in opposite directions, so that the flow channel on the first packing layer is slanted to the inner wall of the side, and the flow channel on the second packing layer is slanted to the center;

[0017] Step three: when the liquid is poured onto the upper side of the first packing layer, the liquid is guided to the center of the first packing layer through the guidance of the first guide plate and the guide plate;

[0018] Step four: when the liquid flows downward through the first filler layer, the liquid drops onto the second filler layer without contacting the inner wall due to the cutout below the first filler layer, and the liquid flows towards the center and flows out due to the flow channel on the second filler layer being inclined towards the center.

[0019] In summary, the present application has at least one of the following beneficial effects:

[0020] 1. The first filler layer and the second filler layer are installed inside the first ring body and the second ring body, and are installed in opposite directions. Before installing the first filler layer, a slanted cutout is cut below the first filler layer, and the cutout is inclined towards the center of the first filler layer. When the liquid flows downward, the liquid drops onto the second filler layer without contacting the inner wall, and the liquid flows towards the center to avoid wall flow and improve the overall practicability.

[0021] 2. The first guide plate and the second guide plate are connected to the edges of the first ring body and the second ring body. The first guide plate is folded outward to form a horn shape, which facilitates the collection of falling liquid and prevents the liquid from spilling out of the first ring body and the inner wall of the rectifying tower body. The second guide plate is folded inward to form a funnel shape, which facilitates the collection and guidance of the liquid passing through the first ring body, and the liquid is concentrated and introduced to avoid contact with the inner wall when the liquid flows in and out, thereby avoiding the phenomenon of liquid wall flow. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a structure diagram of the rectifying tower body of the present application;

[0024] Figure 3 is a structure diagram of the first ring body of the present application;

[0025] Figure 4 is a cross-sectional view of the first ring body and the filler assembly of the present application;

[0026] Figure 5 is a structure diagram of the support plate of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS:

[0028] 1, rectifying tower body; 11, gas outlet pipe; 12, liquid outlet pipe; 13, liquid inlet pipe; 14, gas inlet pipe; 15, observation window; 2, first ring body; 21, reinforcing rib; 3, second ring body; 4, first guide plate; 41, cutting seam; 42, guide plate; 5, second guide plate; 6, support plate; 61, through hole; 7, liquid distributor; 8, liquid redistributor; 81, liquid collecting hopper; 9, packing assembly; 91, first packing layer; 911, notch; 92, second packing layer; 93, flow channel. DETAILED DESCRIPTION

[0029] The application is further described below in conjunction with the accompanying drawings Figures 1-5 The application is further described below in conjunction with the accompanying drawings

[0030] Please refer to Figures 1-5 An embodiment provided by the application is a rectifying tower anti-wall flow packing structure, which comprises a rectifying tower body 1, the inner part of the rectifying tower body 1 is respectively provided with a first ring body 2 and a second ring body 3, the first ring body 2 and the second ring body 3 are of the same structure, the upper and lower ends of the first ring body 2 and the second ring body 3 are respectively provided with a first guide plate 4 and a second guide plate 5, the lower part of the second guide plate 5 is provided with a support plate 6, the surface of the support plate 6 is provided with a rectangular array of through holes 61, the support plate 6 can not only play a supporting and stabilizing effect, but also facilitate the normal flow of liquid and gas by using the through holes 61. The support plate 6 is fixed on the inner wall of the rectifying tower body 1, the upper part of the two groups of first guide plates 4 is respectively provided with a liquid distributor 7 and a liquid redistributor 8 (the model can be DN-7000), the upper end of the liquid redistributor 8 is connected with a liquid collecting hopper 81, the inner part of the first ring body 2 and the second ring body 3 is filled with a packing assembly 9. When the liquid enters the inner part of the liquid distributor 7 and the liquid redistributor 8, the liquid can be evenly distributed on the top of the packing assembly 9.

[0031] The upper end of the rectifying tower body 1 is provided with a gas outlet pipe 11, the bottom of the rectifying tower body 1 is provided with a liquid outlet pipe 12, the upper end of one side of the rectifying tower body 1 is connected with a liquid inlet pipe 13, the lower end of the other side of the rectifying tower body 1 is connected with a gas inlet pipe 14, and the surface of the rectifying tower body 1 is provided with an observation window 15.

[0032] The first ring body 2 and the second ring body 3 are both hollow cylindrical structures, and the outer wall of the first ring body 2 and the second ring body 3 is provided with reinforcing ribs 21 at intervals.

[0033] The first guide plate 4 is outwardly folded at the upper part to be in a horn shape (convenient for gathering the falling liquid and avoiding liquid splashing from the first ring body 2 and the inner wall of the rectifying tower body 1), and the second guide plate 5 is inwardly folded at the lower part to be in a funnel shape, which is convenient for collecting and guiding the liquid passing through the first ring body 2 and introducing the liquid.

[0034] The surface of the first guide plate 4 is provided with a shearing joint 41, and the lower end of the first guide plate 4 is connected with a guide plate 42, which is folded inwardly and obliquely at the connecting position with the first guide plate 4, so as to conveniently guide the wall flow liquid to the middle of the packing assembly 9.

[0035] The rectifying tower body 1 is connected with the liquid inlet pipe 13 and the liquid outlet pipe 12 for liquid inlet and outlet, and is connected with the gas inlet pipe 14 and the gas outlet pipe 11 for gas inlet and outlet, and the working staff can timely know the working progress in the rectifying tower body 1 through the observation window 15. The working staff can put the packing assembly 9 into the first ring body 2 and the second ring body 3 in advance, and then connect the first guide plate 4 and the second guide plate 5 at the edges of the two ends of the first ring body 2 and the second ring body 3, and then place the first ring body 2 and the second ring body 3 on the support plate 6, and weld the reinforcing ribs 21 outside the first ring body 2 and the second ring body 3 to improve the fixing effect and facilitate the contact connection between the first ring body 2 and the second ring body 3 and the inner wall of the rectifying tower body 1. At this time, when the liquid enters the liquid distributor 7 through the liquid inlet pipe 13, the liquid distributor 7 can spray the liquid downward, and the liquid will flow to the center of the packing assembly 9 through the guidance of the first guide plate 4 and the guide plate 42, and when the liquid passes through the first ring body 2, it will be gathered and guided by the second guide plate 5, and then be introduced into the liquid collecting hopper 81, and then be introduced into the liquid redistributor 8 through the liquid collecting hopper 81, and finally be sprayed onto the packing assembly 9 above the second ring body 3 by the liquid redistributor 8.

[0036] Please refer to Figure 3 and Figure 4 The packing assembly 9 comprises a first packing layer 91 and a second packing layer 92 arranged in an upper and lower manner, and the surfaces of the first packing layer 91 and the second packing layer 92 are provided with flow channels 93 with equal intervals (the first packing layer 91 and the second packing layer 92 are any one of stainless steel, carbon steel, other metal materials, and plastic or ceramic).

[0037] The first packing layer 91 is cut with an oblique cutout 911.

[0038] The first packing layer 91 and the second packing layer 92 are installed in opposite directions, the flow channels 93 on the first packing layer 91 are inclined to the inner wall of the side edge, and the flow channels 93 on the second packing layer 92 are inclined to the center.

[0039] The cutout 911 is inclined to the center of the first packing layer 91, and the cutout 911 is an acute angle, and the cutting angle is between 30 degrees and 60 degrees.

[0040] The first filler layer 91 and the second filler layer 92 are installed inside the first ring body 2 and the second ring body 3, and are installed in opposite directions, so that the flow channel 93 on the first filler layer 91 is inclined to the inner wall of the side, and the flow channel 93 on the second filler layer 92 is inclined to the center,

[0041] Before the first filler layer 91 is installed, an inclined cutout 911 is cut below the first filler layer 91, and the cutout 911 is inclined to the center of the first filler layer 91, and after the first filler layer 91 and the second filler layer 92 are installed, the first filler layer 91 and the second filler layer 92 directly leave an acute gap, so that the flow channel 93 below the first filler layer 91 does not directly contact the inner wall (see Figure 4 ), so that when the liquid flows downward, it does not contact the inner wall and falls downward into the second filler layer 92, and because the flow channel 93 on the second filler layer 92 is inclined to the center, the liquid flows to the center to avoid wall flow and improve the overall practicability.

[0042] In order to better show a kind of rectifying column anti-wall flow filler structure, the embodiment presents a kind of rectifying column anti-wall flow filler structure and method thereof, comprising the following steps:

[0043] Step one: when the first filler layer 91 and the second filler layer 92 are installed, first cut an inclined cutout 911 below the first filler layer 91, and the cutout 911 is inclined to the center of the first filler layer 91;

[0044] Step two: then install the first filler layer 91 and the second filler layer 92, and install them in opposite directions, so that the flow channel 93 on the first filler layer 91 is inclined to the inner wall of the side, and the flow channel 93 on the second filler layer 92 is inclined to the center;

[0045] Step three: when the liquid is poured into the upper part of the first filler layer 91, the liquid is guided to the center of the first filler layer 91 by the first guide plate 4 and the guide plate 42;

[0046] Step four: when the liquid flows downward through the first filler layer 91, because the cutout 911 is provided below the first filler layer 91, the liquid falls downward into the second filler layer 92 without contacting the inner wall, and because the flow channel 93 on the second filler layer 92 is inclined to the center, the liquid flows to the center when flowing.

[0047] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A structured packing for a distillation column guard wall, comprising a distillation column body (1), characterized in that: The inner part of the rectifying tower body (1) is respectively provided with a first ring body (2) and a second ring body (3), the first ring body (2) and the second ring body (3) are the same structure, the upper and lower ends of the first ring body (2) and the second ring body (3) are respectively provided with a first guide plate (4) and a second guide plate (5), the lower part of the second guide plate (5) is provided with a support plate (6), the support plate (6) is fixed on the inner wall of the rectifying tower body (1), the upper part of the two groups of first guide plates (4) is respectively provided with a liquid distributor (7) and a liquid redistributor (8), the inside of the first ring body (2) and the second ring body (3) is filled with a filler assembly (9); The filler assembly (9) comprises a first filler layer (91) and a second filler layer (92) arranged in two layers, and the first filler layer (91) and the second filler layer (92) are both provided with longitudinally inclined flow channels (93) with equal intervals; The lower part of the first filler layer (91) is cut into an inclined notch (911), the first filler layer (91) and the second filler layer (92) are installed in opposite directions, the flow channels (93) on the first filler layer (91) are inclined to the inner wall of the side edge, the flow channels (93) on the second filler layer (92) are inclined to the center, the notch (911) of the first filler layer (91) is low in the middle and high on the outside, the notch (911) is an acute angle, and the cutting angle is between 30 degrees and 60 degrees.

2. A structured packing for a distillation column according to claim 1, wherein: The upper end of the rectifying tower body (1) is provided with an air outlet pipe (11), the bottom of the rectifying tower body (1) is provided with a liquid outlet pipe (12), the upper end of one side of the rectifying tower body (1) is connected with a liquid inlet pipe (13), the lower end of the other side of the rectifying tower body (1) is connected with an air inlet pipe (14), and the surface of the rectifying tower body (1) is provided with an observation window (15).

3. A structured packing for a distillation column according to claim 1, wherein: The first ring body (2) and the second ring body (3) are both hollow cylindrical structures, and the outer wall of the first ring body (2) and the second ring body (3) is provided with reinforcing ribs (21) at intervals.

4. A structured packing for a distillation column according to claim 1, wherein: The first guide plate (4) is folded outward to be trumpet-shaped, and the second guide plate (5) is folded inward to be funnel-shaped.

5. A structured packing for a distillation column according to claim 1, wherein: The surface of the first guide plate (4) is provided with a shear joint (41) at intervals, and the lower end of the first guide plate (4) is connected with a guide plate (42) which is folded inward to be inclined at the connection position.

6. A structured packing for a distillation column according to claim 1, wherein: The upper end of the liquid redistributor (8) is connected with a liquid collecting hopper (81).

7. A structured packing for a distillation column according to claim 1 wherein: The surface of the support plate (6) is provided with a rectangular array of through holes (61).

8. A method for preventing wall flow of the rectifying tower, comprising the following steps: S1: before the first filler layer (91) and the second filler layer (92) are installed, the inclined notch (911) is cut in the lower part of the first filler layer (91), and the notch (911) is inclined to the center of the first filler layer (91). S2: Then the first filler layer (91) and the second filler layer (92) are installed, and the two are installed in opposite directions, so that the flow channel (93) on the first filler layer (91) is inclined to the inner wall of the side, and the flow channel (93) on the second filler layer (92) is inclined to the center; S3: When the liquid is poured above the first filler layer (91), the liquid is guided to the center of the first filler layer (91) by the first guide plate (4) and the guide plate (42); S4: When the liquid flows down through the first filler layer (91), since the cutout (911) is opened below the first filler layer (91), the liquid drops into the second filler layer (92) before it contacts the inner wall, and since the flow channel (93) on the second filler layer (92) is inclined to the center, the liquid flows to the center when it flows out.

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