A distillation column tray structure

Abstract

The utility model provides a rectifying column tray structure relates to rectifying column technical field, including horizontal tray and weir flow board, be provided with several lift pipe on horizontal tray, the upside fixed mounting of lift pipe has the gas cover mechanism, the gas cover mechanism includes gas cover body, dispersion ring and connecting sleeve, the circumference of dispersion ring is equipped with several venturi air channel, the venturi air channel includes air inlet, convergence portion, throat portion and diffusion exit from inside to outside in proper order, the downside of dispersion ring is provided with the shearing through -hole being linked with throat portion, the top of lift pipe is fixed with fixed support, the upper side of gas cover body is rotatably connected with fixed bolt, the lower extreme of fixed bolt is connected on fixed support in screw thread, the utility model discloses can cut the gas phase material to be innumerable small bubble and shoot out through venturi air channel, can improve the heat exchange efficiency, has reached better separation effect.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to a distillation column tray structure. Background Technology

[0002] Distillation column trays are the core components for achieving efficient mass and heat transfer between the gas and liquid phases. High-temperature gaseous materials undergo full liquid-liquid contact and heat exchange on the trays. Through countercurrent contact, volatile components are enriched in the gas phase, while non-volatile components are enriched in the liquid phase, thereby achieving the separation of the mixture.

[0003] For example, the utility model patent with announcement number CN221998919U discloses a distillation column tray assembly. The specification describes that the exhaust mechanism includes an exhaust block, a connecting rod, a top cover, a connecting hole, an exhaust port, a first nut, and an exhaust port. Through the exhaust mechanism, steam is added into the distillation column through the steam inlet, and the steam is discharged into the top cover through the exhaust port and then discharged from the exhaust port on the top cover. This achieves the effect of allowing the steam to have more sufficient contact with the liquid on the tray, thus improving the distillation effect.

[0004] However, allowing the steam entering the distillation column to exit through the steam outlet will form large bubbles that rise vertically and separate rapidly in the liquid phase. During this process, the bubble residence time and specific surface area are small, resulting in low heat exchange efficiency between the gas and liquid phases. Furthermore, the rapid rise of the bubbles can easily create short-circuit near the top cover, causing concentration and temperature gradients in the liquid phase on the tray, resulting in uneven distribution of the liquid phase and further affecting the separation efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a distillation column tray structure that solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A distillation column tray structure includes a horizontal tray and a weir plate vertically welded to one side of the horizontal tray. Several vertically connected riser pipes are arranged on the horizontal tray. A gas hood mechanism is fixedly installed on the upper side of each riser pipe. The gas hood mechanism, from top to bottom, includes an integrally formed gas hood body, a dispersion ring, and a connecting sleeve. The gas hood body is fixedly installed over the top of the riser pipes, forming a riser cavity between the gas hood body and the outer wall of the riser pipes. Several Venturi channels are circumferentially formed on the dispersion ring. From the inside out, each Venturi channel includes an inlet, a converging portion, a throat portion, and a diffusion outlet. A shearing through-hole communicating with the throat portion is provided on the lower side of the dispersion ring. The inlet communicates with the riser cavity.

[0010] Preferably, the Venturi airway is inclined from the inside out.

[0011] Preferably, a fixing bracket is fixed to the top of the air riser, and a threaded hole is provided on the fixing bracket. A fixing bolt is rotatably connected to the upper side of the air cover body, and the lower end of the fixing bolt is threaded into the threaded hole.

[0012] Preferably, a sealing seat is welded and fixed on the horizontal tower plate, the sealing seat is sleeved on the outside of the riser pipe, the connecting sleeve abuts against the upper side of the sealing seat, and a sealing ring is installed between the connecting sleeve and the sealing seat.

[0013] Preferably, the outer surface of the sealing seat is provided with a plurality of spline grooves, and the inner wall of the connecting sleeve is provided with a spline block that slides and engages with the spline grooves.

[0014] (III) Beneficial Effects

[0015] This invention provides a distillation column tray structure. It has the following beneficial effects:

[0016] 1. In this invention, the gaseous material on the lower side of the horizontal tower plate enters the rising air cavity through the riser pipe and enters the Venturi gas channel at a certain pressure. The gaseous material is accelerated in the throat, which reduces the pressure in the throat. The pressure difference can draw in the liquid material on the lower side through the shearing through hole and mix it with the gaseous material. The liquid material shears the gaseous material into countless small bubbles and discharges them from the diffusion outlet. Compared with the original large bubbles, the small bubbles have a larger specific surface area, a thinner boundary layer thermal resistance, and a longer liquid contact time, which allows the gaseous material and the liquid material to exchange heat fully.

[0017] 2. In this invention, the gaseous material is ejected at an angle along the inclined Venturi gas channel, which can push the liquid material on the horizontal tower plate to flow, so as to form turbulence in the liquid material and make it uniformly mixed, thus avoiding the presence of concentration gradients and temperature gradients in the liquid material. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a distillation column tray according to the present invention;

[0019] Figure 2 for Figure 1 A sectional view;

[0020] Figure 3 This is a schematic diagram of the gas hood mechanism in this utility model;

[0021] Figure 4 This is a cross-sectional view of the dispersion ring in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the horizontal tower plate in this utility model.

[0023] In the diagram: 1. Horizontal tray; 2. Weir plate; 3. Riser pipe; 4. Fixed support; 5. Gas hood body; 6. Dispersion ring; 7. Connecting sleeve; 8. Fixing bolt; 9. Sealing seat; 10. Sealing ring; 11. Venturi gas passage; 12. Shearing through hole. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] This utility model provides a distillation column tray structure, such as... Figure 5 As shown, the structure includes a horizontal tower plate 1 and a weir plate 2 vertically welded to one side of the horizontal tower plate 1. The upper edge of the weir plate 2 is higher than the horizontal tower plate 1, and the weir plate 2 allows the liquid material to have a certain depth in the horizontal tower plate 1. Several vertically connected gas riser pipes 3 are provided on the horizontal tower plate 1. A fixing bracket 4 is fixed inside the gas riser pipe 3. The fixing bracket 4 is provided with threaded holes, and the gas material on the lower side can flow upward from inside the gas riser pipe 3. A sealing seat 9 is welded and fixed on the horizontal tower plate 1. The sealing seat 9 is sleeved on the outside of the gas riser pipe 3, and several spline grooves are opened on the outside of the sealing seat 9.

[0026] like Figure 1-4 As shown, an air hood mechanism is fixedly installed on the upper side of the air riser pipe 3. The air hood mechanism includes, from top to bottom, an integrally formed air hood body 5, a dispersion ring 6, and a connecting sleeve 7. An air riser cavity is formed between the air hood body 5 and the outer wall of the air riser pipe 3. A fixing bolt 8 is rotatably connected to the air hood body 5. The lower end of the fixing bolt 8 is threaded into a threaded hole. The connecting sleeve 7 abuts against the upper side of the sealing seat 9. A sealing ring 10 is installed between the connecting sleeve 7 and the sealing seat 9. The inner wall of the connecting sleeve 7 is provided with a spline block that slides and engages with the spline groove. Rotating the fixing bolt 8 can fix the air hood body 5 on the upper side of the air riser pipe 3, so that the connecting sleeve 7 presses against the middle of the sealing seat 9, and presses the sealing ring 10 to form a seal.

[0027] The dispersion ring 6 has several Venturi channels 11 inclined from the inside to the outside around its circumference. The Venturi channels 11 include, from the inside to the outside, an air inlet, a constriction section, a throat section, and a diffusion outlet. The air inlet is connected to the rising air cavity. The inner diameter of the throat section is smaller than the inner diameter of the air inlet. The lower side of the dispersion ring 6 is provided with a shearing through hole 12 connected to the throat section. When the gaseous material enters the air inlet and flows through the throat section, the pressure of the gaseous material inside the throat section will decrease due to the reduced inner diameter, while the flow rate remains constant. This creates a negative pressure, which can draw the liquid material from the lower side through the shearing through hole 12 to mix with the gaseous material. The liquid material then enters the liquid material on the horizontal tray 1 through the diffusion outlet. When mixed with the gaseous material, the liquid material shears the gaseous material into countless small bubbles under the shearing action of the liquid material, and these bubbles are ejected at a certain speed.

[0028] Working principle:

[0029] In this invention, the gaseous material enters the rising cavity through the riser pipe 3 and then enters the Venturi passage 11. As the gaseous material passes through the constriction section and enters the throat section within the Venturi passage 11, the flow rate of the gaseous material increases in the throat section because its inner diameter is smaller than that of the air inlet. This causes a decrease in the internal pressure of the throat section. Due to the pressure difference between the throat section and the shearing through-hole 12, the liquid material below is drawn in and sheared and mixed with the gaseous material. During this mixing process, the gaseous material is sheared into numerous small bubbles. Ejected from the diffusion outlet at a certain speed, under the action of the same flow rate of gaseous material, countless small bubbles have a larger specific surface area, a thinner boundary layer thermal resistance, and a longer residence time in the liquid material compared to the original large bubbles, which can effectively improve the heat exchange efficiency between the gaseous and liquid materials. In addition, the inclined ejected gaseous material will push the liquid material on the horizontal tray 1 to form turbulence, which can make the liquid material mix more uniformly, avoid the formation of concentration gradients and temperature gradients, and achieve better separation effect.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A distillation column tray structure, comprising a horizontal tray and a weir plate vertically welded to one side of the horizontal tray, characterized in that: Several vertically connected riser pipes are provided on the horizontal tower plate. A gas hood mechanism is fixedly installed on the upper side of the riser pipe. The gas hood mechanism includes an integrally formed gas hood body, a dispersion ring, and a connecting sleeve from top to bottom. The gas hood body is fixedly covered on the top of the riser pipe. A riser cavity is formed between the gas hood body and the outer wall of the riser pipe. Several Venturi channels are opened on the circumference of the dispersion ring. The Venturi channels include, from the inside to the outside, an air inlet, a converging part, a throat part, and a diffusion outlet. A shearing through hole communicating with the throat part is provided on the lower side of the dispersion ring. The air inlet communicates with the riser cavity.

2. The distillation column tray structure according to claim 1, characterized in that: The Venturi airway is inclined from the inside out.

3. The distillation column tray structure according to claim 2, characterized in that: A fixed bracket is fixed to the top of the air riser, and a threaded hole is provided on the fixed bracket. A fixing bolt is rotatably connected to the upper side of the air cover body, and the lower end of the fixing bolt is threaded into the threaded hole.

4. The distillation column tray structure according to claim 3, characterized in that: A sealing seat is welded and fixed on the horizontal tower plate. The sealing seat is sleeved on the outside of the riser pipe. The connecting sleeve abuts against the upper side of the sealing seat. A sealing ring is installed between the connecting sleeve and the sealing seat.

5. The distillation column tray structure according to claim 4, characterized in that: The sealing seat has several spline grooves on its outside, and the inner wall of the connecting sleeve is provided with a spline block that slides and engages with the spline grooves.

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