Mass transfer element for vertical sieve plate tower

Abstract

The utility model provides a mass transfer element for a vertical sieve-plate tower, which comprises a cover hood body, the top of the cover hood body is provided with a cover hood top plate, a top gap is arranged between the cover hood top plate and the cover hood body, the cover hood body comprises two symmetrically arranged cover hood plates, and two side plates are symmetrically arranged between the two cover hood plates. A plurality of turbulent flow holes are formed in the side plate; an inner side turbulent flow plate or an outer side turbulent flow plate is arranged on the side plate at the upper parts of the turbulent flow holes; in the cap hood, in the upward flowing process of gas and liquid in the cap hood body, the gas and liquid are subjected to flow disturbing through the inner side spoiler, a gas-liquid mixture is further mixed, then the gas and liquid mixture downwards penetrates through the side plates through the spoiler holes under the pressure formed in the cap hood body, and under the action of the outer side spoiler, further separation of the gas and the liquid is facilitated, and entrainment is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chemical equipment, in particular to a mass transfer element for a vertical sieve tray column. BACKGROUND

[0002] In unit operations such as rectification, absorption and the like, the full contact of gas (vapor) and liquid is involved to achieve full mass transfer and heat transfer, and to achieve phase equilibrium as much as possible, so that the raw materials can be separated through multiple mass transfer and heat transfer processes to obtain the desired product index. The gas-liquid mass transfer element can realize the above functions, and is widely used in towers in the oil refining, petrochemical, chemical, pharmaceutical, environmental protection and other industries.

[0003] The tower for separation is generally divided into a packed column, a tray column, a composite column containing both packing and trays, and the like. The conventional tray column includes a bubble cap column, a float valve column and a sieve tray column, which belong to the bubble tray column. The bubble tray column has limited processing capacity. In order to solve the above defects, a new type of vertical sieve tray column New VST was developed by the Japan Shipbuilding Corporation in the 1960s. The processing capacity of the New VST is obviously improved compared with other tray columns. Since the New VST realizes the co-current jetting operation state of the local unit of the tray, the New VST has high mass transfer efficiency. The design idea of the tray structure developing in space has also been affirmed by the chemical engineering field. In the early 1980s, some colleges and research institutions in China carried out detailed research on the structure and performance of the mass transfer unit on the tray of the New VST, and on this basis, a series of trays with new unit structures were successively proposed. However, the inherent defects of the New VST have not been well solved, and the performance of the tray has not been greatly improved.

[0004] The application aims to solve the problems of the above tray. After searching, no relevant patent documents have been found. CONTENT OF THE UTILITY MODEL

[0005] The application provides a mass transfer element for a vertical sieve tray column, which comprises a cap body, a cap top plate is arranged at the top of the cap body, and a top gap is arranged between the cap top plate and the cap body. The cap body comprises two cap plates which are symmetrically arranged, two side plates are symmetrically arranged between the two cap plates, a plurality of turbulence holes are arranged on the two side plates, and an inner turbulence plate or an outer turbulence plate is arranged on the upper part of the turbulence hole on the side plate.

[0006] As a preferred scheme, the inner turbulence plate and the outer turbulence plate on the turbulence holes in the transverse row are staggered.

[0007] As a preferred scheme, the cap body is installed on the tray, and the included angle between the side plate and the vertical surface of the tray is 3-6 degrees.

[0008] As a preferred solution, the included angle between the side plate and the vertical plane of the tray is 4.5°.

[0009] As a preferred solution, the shape of the spoiler hole is the same as the shape of the inner spoiler plate and the shape of the outer spoiler plate.

[0010] As a preferred solution, the shape of the spoiler hole is at least one of oval, square, and runway type.

[0011] As a preferred solution, the inner spoiler plate and the outer spoiler plate are integrally formed with the side plate.

[0012] As a preferred solution, the inner spoiler plate is obtained by inwardly protruding the spoiler hole, and the outer spoiler plate is obtained by outwardly protruding the spoiler hole.

[0013] In the present application, during the upward flow of the gas-liquid mixture in the cap body, the gas-liquid mixture is further mixed by the inner spoiler plate, and then passes through the side plate downwardly through the spoiler hole under the pressure formed in the cap body. Under the action of the outer spoiler plate, the gas-liquid mixture is further separated, and the entrainment of mist is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of angle one of the present application;

[0015] Figure 2 is a structural schematic view of angle two of the present application;

[0016] Figure 3 is a partial structural schematic view of the present application;

[0017] Figure 4 is a structural schematic view of angle one of the side plate of the present application;

[0018] Figure 5 is a structural schematic view of angle two of the side plate of the present application;

[0019] 1, cap body; 2, cap top plate; 3, top gap; 4, cap plate; 5, side plate; 6, spoiler hole; 7, inner spoiler plate; 8, outer spoiler plate; 9, tray; 10, lower gap; 11, through hole. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figures 1 to 5 The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0021] Embodiment:

[0022] The embodiment provides a mass transfer element for a vertical sieve tray column, which comprises a cap body 1, the top of the cap body 1 is provided with a cap top plate 2, the cap top plate 2 and the cap body 1 have a top gap 3, the shape of the cap body 1 is not limited, and a skilled person can make a corresponding selection according to the specific situation, the cap body 1 comprises two cap plates 4 arranged symmetrically, the cap plate 4 in the embodiment adopts a trapezoidal plate, two side plates 5 arranged symmetrically are arranged between the two cap plates 4, the side plate 5 adopts a rectangular plate, and the four plates of the two cap plates 4 and the two side plates 5 are formed by welding or the like; a plurality of turbulence holes 6 are formed in the side plate 5, the upper part of the turbulence hole 6 is provided with an inner turbulence plate 7 or an outer turbulence plate 8, more specifically, the inner turbulence plate 7 or the outer turbulence plate 8 is folded inward and outward when the turbulence hole 6 is punched, the inner turbulence plate 7 folded inward forms a turbulence stirring effect, the outer turbulence plate 8 folded outward controls the horizontal downward injection of the gas-liquid mixture, avoids gas-liquid entrainment, the shape of the turbulence hole 6 is the same as that of the inner turbulence plate 7 and the outer turbulence plate 8, and the shape in the embodiment is preferably a runway type; preferably, the inner turbulence plates 7 and the outer turbulence plates 8 of adjacent turbulence holes 6 in a transverse row are arranged alternately, as shown in the first transverse row of turbulence holes 6, six turbulence holes 6 are included, the first turbulence hole 6 is provided with the inner turbulence plate 7, the second turbulence hole 6 is provided with the outer turbulence plate 8, the third turbulence hole 6 is provided with the inner turbulence plate 7, the fourth turbulence hole 6 is provided with the outer turbulence plate 8, the fifth turbulence hole 6 is provided with the inner turbulence plate 7, and the sixth turbulence hole 6 is provided with the outer turbulence plate 8, so that the inner turbulence plate 7 is arranged on the inner side of the cap body 1, and the outer turbulence plate 8 is arranged on the outer side of the cap body 1. Figure 2

[0023] The cap body 1 in the embodiment is installed on the tray plate 9 by welding or the like, the lower part of the cap body 1 and the tray plate 9 have a lower gap 10, a plurality of through holes 11 are arranged at the corresponding positions of the tray plate 9 and the cap body 1, in actual application, a plurality of cap bodies 1 are uniformly installed on the tray plate 9; the included angle between the side plate 5 and the vertical plane of the tray plate 9 in the embodiment is 3°-6°, more preferably, the included angle between the side plate 5 and the vertical plane of the tray plate 9 is 4.5°; the setting of the 3°-6° included angle makes the gas-liquid mixture form a certain downward angle to pass through the outer turbulence plate 8 under the pressure formed in the cap body, which is more conducive to the further separation of the gas-liquid and reduces entrainment of mist.

[0024] ​The working principle of the present application is that the gas enters the inside of the cover body through the through hole 11 from the lower part of the tray plate 9, the liquid enters the inside of the cover body from the lower gap 10 during the horizontal flow from the upper part of the tray plate 9, the gas carries the liquid and moves upward, and the gas-liquid mixing is continuously carried out, under the condition that the flow is continuously disturbed by the spoiler 7 on the inside of the side plate 5, the gas-liquid is further mixed, the mass transfer and heat transfer between the gas and the liquid are carried out in the further mixing, the gas-liquid mixture that has completed the further mass transfer and heat transfer is sprayed out through the spoiler hole 6 on the side plate 5 and the top gap 3, the gas-liquid mixture sprayed out through the spoiler hole 6 moves downward, and the gas-liquid separation is further completed under the action of the outer spoiler 8; the gas-liquid mixture sprayed out through the top gap 3 contacts the top plate 2 of the cover, and the gas-liquid separation is completed.

[0025] In summary, due to the adoption of the above technical solutions, the present application has the following advantages:

[0026] 1. During the upward flow of the gas-liquid parallel flow in the cover body, the gas-liquid mixture is further mixed under the flow disturbance of the inner spoiler, and then passes through the outer spoiler under the pressure formed in the inside of the cover body, which is beneficial to the further separation of the gas-liquid and reduces the entrainment of mist;

[0027] 2. The cover plate adopts a trapezoidal plate, the upward flow space of the gas-liquid fluid in the cover gradually decreases, the mixing intensity of the gas-liquid gradually increases, and the further mixing under the action of the inner spoiler is more conducive to the mass transfer and heat transfer;

[0028] 3. The gas-liquid flow route in the cover body tends to be streamline after the action of the inner spoiler, which can reduce the flow resistance;

[0029] 4. The cover plates are symmetrically arranged, the side plates are symmetrically arranged, the impact of the gas-liquid flow on the whole cover body can be partially offset, and the overall structural strength is higher, which can better withstand the impact of high load conditions.

[0030] The devices and connection relationships not specifically described above all belong to the prior art, and the present application will not be specifically described here.

[0031] The preferred mode of the present application is described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0032] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and various possible combinations of the present application will not be described again in order to avoid unnecessary repetition.

[0033] Furthermore, the various embodiments of the application can also be combined with each other, as long as it does not violate the spirit of the application, the application should be considered as disclosed herein.

Claims

1. A mass transfer element for a vertical sieve tray column, comprising a cap body (1), the top of the cap body (1) is provided with a cap top plate (2), the cap top plate (2) and the cap body (1) have a top gap (3) therebetween, the cap body (1) comprises two cap plates (4) arranged symmetrically, two side plates (5) are arranged symmetrically between the two cap plates (4), characterized in that, A plurality of turbulence holes (6) are formed in the two side plates (5), and the upper part of each turbulence hole (6) is provided with an inner turbulence plate (7) or an outer turbulence plate (8).

2. A mass transfer element for a vertical sieve tray column according to claim 1, characterized in that The inner turbulence plates (7) and the outer turbulence plates (8) of adjacent turbulence holes (6) in the same row are staggered.

3. A mass transfer element for a vertical sieve tray column according to claim 1, wherein, The cap body (1) is installed on a tower plate (9), and the included angle between the side plate (5) and the vertical plane of the tower plate (9) is 3°-6°.

4. A mass transfer element for a vertical sieve tray column according to claim 3, wherein, The angle between the side plate (5) and the vertical plane of the tray (9) is 4 . 5°.

5. A mass transfer element for a vertical sieve tray column according to claim 1, wherein, The shape of the turbulence hole (6) is the same as that of the inner turbulence plate (7) and the outer turbulence plate (8).

6. A mass transfer element for a vertical sieve tray column according to claim 5, wherein, The shape of the turbulence hole (6) is at least one of a square, an oval, and a runway type.

7. A mass transfer element for a vertical sieve tray column according to claim 1 wherein, The inner turbulence plate (7) and the outer turbulence plate (8) are integrally formed with the side plate (5).

8. A mass transfer element for a vertical sieve tray column according to claim 7, wherein, The inner turbulence plate (7) is inwardly protruding to the turbulence hole (6), and the outer turbulence plate (8) is outwardly protruding to the turbulence hole (6).

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