Cascade gas-liquid separation tower tray

Abstract

The utility model relates to a stepped gas-liquid separation tower tray which comprises a plurality of layers of stepped tower trays which are arranged in a tower body from top to bottom, and each layer of stepped tower tray comprises a plurality of horizontal tower plates which are distributed in a stepped manner; the highest horizontal tower plate of each layer of stepped tower tray is connected with a liquid receiving tray through a vertical inlet weir plate, the bottom of the lowest horizontal tower plate of each layer of stepped tower tray is connected with a downcomer vertical plate, and a downcomer inclined plate is arranged at the bottom of the downcomer vertical plate; a vertical step plate is connected between every two adjacent horizontal tower plates, a plurality of plate holes are formed in each layer of horizontal tower plate, and a mass transfer element is mounted right above each plate hole. Due to the existence of multiple stages of gradients and a plurality of vertical overflow weirs, the retention time of a gas phase and a liquid phase on the stepped horizontal tower plate is prolonged, the gas-liquid two-phase separation effect is remarkable, the mass transfer efficiency is improved, and a liquid retention area of an arch-shaped area can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas-liquid separation equipment, especially to a cascade gas-liquid separation tray. BACKGROUND

[0002] The tray is an important component of the plate column, and its function is to be used for gas-liquid two-phase mass transfer and heat transfer to realize the separation of gas-liquid two-phase components. Most of the conventional trays currently adopt the whole block type horizontal tray without gradient, but such tray has the problems of large liquid surface gradient, uneven distribution of gas in the liquid flow direction, low gas-liquid separation efficiency, liquid retention area in the arc area on both sides of the tray and the like. SUMMARY

[0003] The utility model aims at solving the insufficient of prior art, and provides a cascade gas-liquid separation tray.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A cascade gas-liquid separation tray comprises a plurality of cascade trays installed in a tower body from top to bottom, and each cascade tray comprises a plurality of horizontal trays arranged in a ladder shape.

[0006] The highest horizontal tray of each cascade tray is connected with a liquid receiving tray through a vertical inlet weir plate, the bottom of the lowest horizontal tray of each cascade tray is connected with a liquid falling vertical plate, and the bottom of the liquid falling vertical plate is provided with a liquid falling inclined plate; a vertical cascade plate is connected between two adjacent horizontal trays, and a plurality of plate holes are formed in each horizontal tray, and a mass transfer element is installed above each plate hole.

[0007] In particular, the plurality of horizontal trays of each cascade tray gradually decrease in the same direction, and the liquid falling vertical plate and the liquid falling inclined plate of each cascade tray form a liquid falling pipe with the corresponding inner wall of the tower body.

[0008] In particular, the plurality of horizontal trays of each cascade tray gradually decrease from the middle to the periphery or gradually decrease from the periphery to the middle, and the two liquid falling vertical plates and the liquid falling inclined plate of each cascade tray form a liquid falling pipe with the corresponding inner wall of the tower body.

[0009] The bottom of the liquid falling inclined plate and the upper surface of the liquid receiving tray of the next cascade tray form a rectangular liquid falling bottom gap, and the height of the liquid falling bottom gap of each cascade tray is 1-500mm.

[0010] The utility model has the advantages that the existence of the multistage gradient and the plurality of vertical overflow weirs increases the residence time of the gas-liquid two-phase on the cascade horizontal tray, significantly improves the gas-liquid two-phase separation effect, increases the separation efficiency, and can avoid the liquid retention area in the arc area. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a front view of the several horizontal trays of each stepped tray of the present application gradually decreasing in the same direction;

[0012] Figure 2 is a plan view of the several horizontal trays of each stepped tray of the present application gradually decreasing in the same direction;

[0013] Figure 3 is a front view of the several horizontal trays of each stepped tray of the present application gradually decreasing from the middle to the periphery or gradually decreasing from the periphery to the middle;

[0014] Figure 4 is a plan view of the several horizontal trays of each stepped tray of the present application gradually decreasing from the middle to the periphery or gradually decreasing from the periphery to the middle;

[0015] In the figure: 1-horizontal tray; 2-inlet weir plate; 3-liquid receiving tray; 4-liquid falling vertical plate; 5-liquid falling pipe; 6-liquid falling inclined plate; 7-stepped plate; 8-plate hole; 9-mass transfer element; 10-tower body;

[0016] The present application will be described in detail below with reference to the embodiments thereof and the accompanying drawings. DETAILED DESCRIPTION

[0017] The principles and features of the present application will be described below in conjunction with the accompanying drawings. The embodiments are only used to explain the present application and are not used to limit the scope of the present application. In the following paragraphs, the present application will be described in more detail with examples and reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that the drawings are very simplified and use non-precise proportions, only to facilitate and clarify the purpose of assisting the description of the embodiments of the present application.

[0018] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0020] The application will be further described below with reference to the drawings and embodiments:

[0021] As shown in the drawings, Figures 1 to 4 A stepped gas-liquid separation tray, comprising a plurality of layers of stepped trays installed in a tower body 10 from top to bottom, each layer of stepped tray comprising a plurality of horizontal trays 1 arranged in a stepped manner.

[0022] The highest horizontal tray 1 of each layer of stepped tray is connected with a liquid receiving tray 3 through a vertical inlet weir plate 2, and the bottom of the lowest horizontal tray 1 of each layer of stepped tray is connected with a liquid falling vertical plate 4, and the bottom of the liquid falling vertical plate 4 is provided with a liquid falling inclined plate 6, which is inclined to the upper surface of the liquid receiving tray 3 of the next layer of stepped tray; a vertical stepped plate 7 is connected between two adjacent horizontal trays 1, and a plurality of plate holes 8 are formed in each horizontal tray 1, and a mass transfer element 9 is installed above each plate hole 8.

[0023] In particular, as shown in the drawings, Figure 1 and Figure 2 The plurality of horizontal trays 1 of each layer of stepped tray gradually decrease in the same direction, and the liquid falling vertical plate 4 of each layer of stepped tray and the inner wall of the tower body 10 form a liquid falling pipe 5.

[0024] In particular, as shown in the drawings, Figure 3 and Figure 4 The plurality of horizontal trays 1 of each layer of stepped tray gradually decrease from the middle to the periphery or gradually decrease from the periphery to the middle, and the two liquid falling vertical plates 4 and the liquid falling inclined plate (6) of each layer of stepped tray and the inner wall of the tower body 10 form a liquid falling pipe 5.

[0025] The bottom of the liquid falling inclined plate 6 and the upper surface of the liquid receiving tray 3 of the next layer of stepped tray form a rectangular liquid falling bottom gap, and the height of the liquid falling bottom gap of each layer of stepped tray is 1-500 mm.

[0026] The number of horizontal trays 1 of each layer of stepped tray is determined according to the actual diameter of the tower body 10, and is 2-500, and the width of each horizontal tray 1 is 1-5000 mm.

[0027] The number of stepped plates 7 of each layer of stepped tray is 1-99, and the height of the stepped plate 7 is 1-1000 mm.

[0028] The number of inlet weirs 2 of the cascade tray of each layer is 1-4.

[0029] The number of downcomer vertical plates 4 of the cascade tray of each layer is 1-4.

[0030] The plate holes 8 on the two adjacent horizontal trays 1 are arranged in staggered mode.

[0031] The shape of the plate holes 8 on the horizontal tray 1 is not fixed, which can be one of circular, rectangular, square, rhombic, trapezoidal, triangular and polygonal, or any combination.

[0032] The shape of the mass transfer element 9 corresponds to the shape of the plate hole 8.

[0033] The cascade tray is connected together with the inner wall of the tower body 10 through a tray ring.

[0034] For the horizontal tray for gas-liquid mass transfer, the liquid phase flow resistance on the tray is not only related to the liquid flow rate, but also affected by the gas velocity, the opening rate and the mechanical structure. The liquid must overcome the resistance to flow forward, thus the liquid level difference, also known as the liquid level gradient, is generated. With the increase of the size of the rectifying tower, the flow path length of the liquid will increase, and a larger liquid level gradient will be inevitably generated. The existence of the larger liquid level gradient will affect the negative effects such as the uneven gas distribution on the tray, the uneven gas-liquid contact, the uneven gas-liquid two-phase mass transfer, the liquid stagnation area existing in the two arc areas on the two sides of the tray and the like. In view of the above situation, the utility model is designed.

[0035] The utility model is different from the conventional horizontal tray, adopts the cascade tray, and a plurality of horizontal trays 1 are arranged in a stepped mode along the liquid flow direction.

[0036] The utility model has the advantages that:

[0037] a. The liquid level gradient in the liquid flow direction of the horizontal tray is avoided, and the uniform gas-liquid distribution and the more efficient gas-liquid separation are promoted.

[0038] b. The horizontal tray has a plurality of horizontal trays 1, and the liquid is mixed for multiple times when flowing from the upper horizontal tray 1 to the lower horizontal tray 1, so that the liquid level is renewed faster, and the efficiency of the gas-liquid two-phase separation is improved.

[0039] c. The plurality of horizontal trays 1 can avoid the liquid stagnation area in the two arc areas.

[0040] The utility model is described above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, and various improvements adopting the method concept and the technical scheme of the utility model or direct application in other occasions without improvement are all within the protection scope of the utility model.

Claims

1. A stepped gas-liquid separation tray characterized by, The tower body (10) is provided with several layers of cascade trays installed from top to bottom in the tower body (10), and each layer of cascade trays comprises several horizontal trays (1) arranged in a stepped manner. The uppermost horizontal tray (1) of each layer of cascade trays is connected with a liquid receiving tray (3) through a vertical inlet weir (2), the bottom of the lowermost horizontal tray (1) of each layer of cascade trays is connected with a liquid downflow vertical plate (4), and the bottom of the liquid downflow vertical plate (4) is provided with a liquid downflow inclined plate (6); a vertical stepped plate (7) is connected between two adjacent horizontal trays (1), and a plurality of plate holes (8) are formed in each horizontal tray (1), and a mass transfer element (9) is installed above each plate hole (8).

2. A cascade gas-liquid separation tray according to claim 1, characterized in that The plurality of horizontal trays (1) of each layer of cascade trays gradually decrease in the same direction, and the liquid downflow vertical plate (4) and the liquid downflow inclined plate (6) of each layer of cascade trays form a liquid downflow pipe (5) with the inner wall of the corresponding tower body (10).

3. A cascade gas-liquid separation tray according to claim 1, characterized in that The plurality of horizontal trays (1) of each layer of cascade trays gradually decrease from the middle to the periphery or gradually decrease from the periphery to the middle, and the two liquid downflow vertical plates (4) and the liquid downflow inclined plate (6) of each layer of cascade trays form a liquid downflow pipe (5) with the inner wall of the corresponding tower body (10).

4. A cascade gas-liquid separation tray according to any one of claims 1 to 3, characterized in that The bottom of the liquid downflow inclined plate (6) and the upper surface of the liquid receiving tray (3) of the next layer of cascade trays form a rectangular liquid downflow bottom gap, and the height of the liquid downflow bottom gap of each layer of cascade trays is 1-500 mm.

5. A cascade gas-liquid separation tray according to claim 4, wherein The width of the horizontal tray (1) is 1-5000 mm.

6. A cascade gas-liquid separation tray according to claim 5, wherein, The number of horizontal trays (1) of each layer of cascade trays is 2-500.

7. A cascade gas-liquid separation tray according to claim 6, wherein The plate holes (8) on the two adjacent horizontal trays (1) are arranged in a staggered manner.

8. A cascade gas-liquid separation tray according to claim 7, characterized in that The shape of the plate hole (8) is one or any combination of a circle, a rectangle, a square, a diamond, a trapezoid and a triangle.

9. A cascade gas-liquid separation tray according to claim 8, characterized in that The number of inlet weirs (2) of each layer of cascade trays is 1-4.

10. A cascade gas-liquid separation tray according to claim 9, characterized in that The number of liquid downflow vertical plates (4) of each layer of cascade trays is 1-4.

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