Novel spiral-flow type bubble cap structure for gas-liquid reaction and bubble cap dehydrating tower

Abstract

The invention discloses a novel spiral-flow type bubble cap structure for gas-liquid reaction and a bubble cap dehydrating tower. The novel spiral-flow type bubble cap structure comprises a gas rising pipe, and guide plates are sequentially and uniformly arranged on the outer wall of the gas rising pipe in the circumferential direction; the flow guide plate is of a spiral blade structure; a vent hole is formed between every two adjacent flow guide plates on the wall surface of the riser; and the bubble cap cover is arranged outside the flow guide plate from the top of the gas rising pipe in a covering mode, and the outer side end of the flow guide plate is tightly attached to the inner wall of the bubble cap cover. According to the spiral-flow type bubble cap structure, the flow guide plate is arranged between the gas rising pipe and the bubble cap cover, meanwhile, the forming positions of the vent holes are modified, the flowing mode of wet purified gas can be converted into tangential spiral flow from axial flow along the gas rising pipe, and the wet purified gas flows in the tangential direction of the tower plate under the action of the spiral flow; the mixing rate of the wet purified gas and the glycol solution is improved, and meanwhile the pressure drop of the wet purified gas passing through the bubble cap is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tower equipment, in particular to a novel cyclone bubble structure and a bubble dehydration tower for gas-liquid reaction. Background Art

[0002] The bubble cap dehydration tower is a dehydration tower structure widely used in the TEG dehydration process. It sets multiple bubble cap structures on the tower plate. The wet purified gas enters the tower from the bottom of the tower, and generates a dispersed airflow after passing through the bubble cap, which increases the contact area with the external TEG solution, thereby improving the TEG dehydration efficiency and dehydration depth. The core structure of the bubble cap dehydration tower is the bubble cap tower plate. The bubble cap structure installed on the tower plate and its distribution on the tower plate have an important influence on the dehydration efficiency.

[0003] The blister structure widely used at present is to open a plurality of slits as vent holes around the lower periphery of the blister cover (such as Figure 1 ), the tooth gap is usually triangular, rectangular or trapezoidal. During operation, the liquid flows horizontally across the tower plate, and the overflow weir maintains a certain thickness of liquid layer on the tower plate, and the tooth gap is immersed in the liquid layer to form a liquid seal. When the rising gas enters the liquid layer through the tooth gap, it is dispersed into many tiny bubbles or streams, forming a bubbling layer on the tower plate, providing a large number of interfaces for heat and mass transfer between the gas and liquid phases. This bubble cap structure is simple to manufacture, low in cost, and relatively convenient to maintain, but the existing tooth gap structure has problems such as uneven mixing due to the gas-liquid mixing dead zone, excessive pressure drop on the tower plate, low dehydration efficiency, and low production capacity and production efficiency.

[0004] In view of this, this application is hereby filed. Summary of the invention

[0005] The problem with the prior art is that the tooth gap structure adopted in the existing bubble structure has a dead zone for gas-liquid mixing, resulting in uneven mixing, excessive pressure drop on the tower plate, low dehydration efficiency, and low production capacity and production efficiency. The purpose of the present invention is to provide a new cyclone bubble structure and a bubble dehydration tower for gas-liquid reaction. By arranging a guide plate between the riser and the bubble cover and modifying the opening position of the air hole, the flow mode of the wet purified gas can be converted from axial flow along the riser to tangential cyclone. The wet purified gas flows tangentially along the tower plate under the action of the cyclone, thereby increasing the mixing rate of the wet purified gas and the glycol solution and reducing the pressure drop of the wet purified gas through the bubble.

[0006] The present invention is achieved through the following technical solutions:

[0007] A novel cyclonic bubble structure for gas-liquid reaction comprises a riser, on the outer wall of which flow guide plates are evenly arranged in sequence along the circumferential direction;

[0008] The guide plate is in a spiral blade structure;

[0009] Ventilation holes are provided between two adjacent guide plates on the wall surface of the riser;

[0010] It also comprises a bubble cover, which is arranged outside the guide plate from the top of the riser pipe, and the outer end of the guide plate is tightly fitted with the inner wall of the bubble cover.

[0011] The swirl bubble structure of the present invention can convert the flow mode of the wet purified gas from axial flow along the riser to tangential swirl flow by arranging a guide plate between the riser and the bubble cover and modifying the opening position of the vent hole. The wet purified gas flows tangentially along the tower plate under the action of the swirl flow, thereby improving the mixing rate of the wet purified gas and the glycol solution and reducing the pressure drop of the wet purified gas through the bubble.

[0012] The swirl bubble structure of the present invention has an outer surface of the riser connected to the guide plate by welding or inlaying, and the guide plate and the bubble cover are kept sealed. The guide plate is used to divide the gas flow into a plurality of independent flow channels. Therefore, the wet purified gas discharged from the air vent can only flow out from the bottom of the bubble cover along the channel enclosed by the guide plate and the bubble cover, thereby converting the axial movement of the airflow into tangential rotational movement, and finally the rotating gas flows out from the gap between the bottom of the bubble cover and the tower plate, which greatly reduces the gas-liquid mixing dead zone range and increases the mixing area of ​​the wet purified gas and the triethylene glycol solution. Moreover, since the airflow is divided into a plurality of independent flow channels, the maximum allowable airflow velocity of the bubble tower is increased, which can improve the dehydration efficiency of the triethylene glycol. At the same time, by changing the bubble structure, the form in which the wet purified gas enters the tower plate is changed from countercurrent to cocurrent, thereby reducing the pressure loss between the plates and reducing the pressure drop of the wet purified gas passing through the tower plate.

[0013] In one embodiment, the vent hole has an axial inclination angle of 10 to 15°, an annular inclination angle of 30 to 60°, and the inclination direction is consistent with the spiral direction of the guide plate. The axial inclination angle refers to the angle between the inclination direction of the vent hole and the axial direction of the riser; the annular inclination angle refers to the angle between the outlet direction of the vent hole and the radial direction of the riser.

[0014] The vent hole of the present invention is an oblique opening structure, which cooperates with the spiral structure of the guide plate to further convert the axial flow motion of the gas into swirl motion, thereby increasing the mixing area of ​​the wet purified gas and the triethylene glycol solution.

[0015] In a certain embodiment, the diameter of the bubble cover gradually increases from top to bottom and the middle part of the bubble cover has a curved surface structure. The curved surface of the bubble cover and the structure with gradually increasing diameter are combined with the spiral structure of the guide plate, that is, the gas flow channel gradually increases along the gas flow direction, which can not only further increase the maximum allowable airflow velocity of the bubble tower and improve the dehydration efficiency, but also further reduce the tower plate pressure drop; in addition, this structure also increases the flow rate of the tangential rotational motion of the airflow, thereby improving the contact efficiency between the airflow and the liquid.

[0016] In one embodiment, the number of the ventilation holes is 8 to 12.

[0017] In one embodiment, the riser pipe and the bubble cap are fixedly connected by bolts.

[0018] In one embodiment, the helix angle of the guide plate is 25-45°.

[0019] In one embodiment, the pitch between the guide plates is 215-300 mm.

[0020] In one embodiment, a plurality of flow-increasing plates are arranged between two adjacent flow guide plates at the inner bottom of the bubble cover along the circumferential direction, the inclination direction of the flow-increasing plates also matches the inclination direction of the flow guide plates, and the width of the flow-increasing plates is 1 / 4 to 1 / 3 of the width of the flow guide plates. The present invention adds flow-increasing plates at the bottom of the bubble cover, and when the gas rotates to the bottom of the bubble cover, it is divided into smaller fluids by the flow-increasing plates, which can increase the airflow velocity and pressure when the airflow contacts the liquid at the outlet of the gas, further increase the gas-liquid mixing area, and improve the gas-liquid mixing rate and the wet purified gas dehydration rate.

[0021] The present invention also provides a novel cyclone bubble dehydration tower for gas-liquid reaction, comprising a plurality of bubble structures and tower plates, wherein the lower end of the riser pipe of the bubble structure penetrates the tower plate and is connected to the bottom of the tower plate.

[0022] In one embodiment, a plurality of bubble cap structures are arranged and distributed on the tray in an equilateral triangle structure.

[0023] In one embodiment, a plurality of bubble cap structures are arranged and distributed in an isosceles trapezoidal structure on a tower plate, and a bubble cap structure is also distributed at the center of each isosceles trapezoidal structure. The length of the short side of the isosceles trapezoid is 3 / 5 of the length of the long side, and the height of the isosceles trapezoid is the same as the length of the short side. The present invention improves the distribution and arrangement of the bubble cap structures on the tower plate, which can not only ensure the dehydration efficiency of the bubble cap tower, but also reduce the number of bubble cap structures and reduce costs.

[0024] In one embodiment, the gas channel gap between the bubble cap cover and the tray is 10 to 15 mm.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The present invention proposes a novel cyclonic bubble structure for gas-liquid reaction, which uses a vortex structure formed by a guide plate to replace the bubble tooth gap structure, and changes the direct airflow flowing out of the tooth gap channel into a tangential rotating airflow, which greatly reduces the gas-liquid mixing dead zone range, increases the gas-liquid mixing area, and improves the gas-liquid mixing rate and the wet purified gas dehydration rate;

[0027] 2. The present invention proposes a novel cyclonic bubble structure for gas-liquid reaction. By improving the bubble structure, the form in which the wet purified gas enters the tower plate is changed from the countercurrent type of the bubble tooth gap structure to the downstream type, thereby reducing the pressure loss between the tower plates;

[0028] 3. The present invention proposes a novel cyclonic bubble structure for gas-liquid reaction. Since the airflow is divided into a number of independent flow channels by the bubble structure, the maximum allowable airflow velocity of the bubble tower is increased, thereby improving the production capacity;

[0029] 4. The present invention proposes a novel cyclonic bubble structure for gas-liquid reaction, which adds a flow-increasing plate. When the gas rotates to the bottom of the bubble cover, it is divided into smaller fluids by the flow-increasing plate, which can increase the gas velocity and pressure when the gas contacts the liquid at the gas outlet, further increase the gas-liquid mixing area, and improve the gas-liquid mixing rate and the wet purified gas dehydration rate;

[0030] 5. The present invention proposes a new cyclone bubble dehydration tower for gas-liquid reaction. By improving the distribution and arrangement of the bubble structure on the tower plate, it can not only ensure the dehydration efficiency of the bubble tower, but also reduce the number of bubble structures and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the existing bubble structure provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a bubble structure provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of an isosceles trapezoidal arrangement of bubbles on a tray provided in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the axial inclination angle provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the annular inclination angle provided in an embodiment of the present invention.

[0037] Marks and corresponding parts names in the attached drawings:

[0038] 1-riser pipe, 2-guide plate, 3-vent, 4-bubble cover, 5-increase plate, 6-tower plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0040] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, or methods are not specifically described.

[0041] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 2-Figure 3 As shown, an embodiment of the present invention provides a novel cyclone bubble structure for gas-liquid reaction, comprising a riser 1, on the outer wall of which flow guide plates 2 are evenly arranged in sequence along the circumferential direction;

[0045] The guide plate 2 is a spiral blade structure;

[0046] Ventilation holes 3 are provided between two adjacent guide plates 2 on the wall surface of the riser 1;

[0047] It also includes a bubble cover 4, which is covered on the outside of the guide plate 2 from the top of the riser 1, and the outer end of the guide plate 2 is tightly fitted with the inner wall of the bubble cover 4.

[0048] The swirl bubble structure of the present invention can convert the flow mode of the wet purified gas from axial flow along the riser to tangential swirl flow by arranging a guide plate between the riser and the bubble cover and modifying the opening position of the vent hole. The wet purified gas flows tangentially along the tower plate under the action of the swirl flow, thereby improving the mixing rate of the wet purified gas and the glycol solution and reducing the pressure drop of the wet purified gas through the bubble.

[0049] The swirl bubble structure of the present invention has an outer surface of the riser connected to the guide plate by welding or inlaying, and the guide plate and the bubble cover are kept sealed. The guide plate is used to divide the gas flow into a plurality of independent flow channels. Therefore, the wet purified gas discharged from the air vent can only flow out from the bottom of the bubble cover along the channel enclosed by the guide plate and the bubble cover, thereby converting the axial movement of the airflow into tangential rotational movement, and finally the rotating gas flows out from the gap between the bottom of the bubble cover and the tower plate, which greatly reduces the gas-liquid mixing dead zone range and increases the mixing area of ​​the wet purified gas and the triethylene glycol solution. Moreover, since the airflow is divided into a plurality of independent flow channels, the maximum allowable airflow velocity of the bubble tower is increased, which can improve the dehydration efficiency of the triethylene glycol. At the same time, by changing the bubble structure, the form in which the wet purified gas enters the tower plate is changed from countercurrent to cocurrent, thereby reducing the pressure loss between the plates and reducing the pressure drop of the wet purified gas passing through the tower plate.

[0050] In one embodiment, the vent hole 3 has an axial inclination angle of 10 to 15°, an annular inclination angle of 30 to 60°, and the inclination direction is consistent with the spiral direction of the guide plate 2. The axial inclination angle refers to the angle between the inclination direction of the vent hole and the axial direction of the riser. Figure 4 ; The annular inclination angle refers to the angle between the outlet direction of the vent and the radial direction of the riser, see Figure 5 ).

[0051] The vent hole of the present invention is an oblique opening structure, which cooperates with the spiral structure of the guide plate to further convert the axial flow motion of the gas into swirl motion, thereby increasing the mixing area of ​​the wet purified gas and the triethylene glycol solution.

[0052] In a certain embodiment, the diameter of the bubble cover 4 gradually increases from top to bottom and the middle part of the bubble cover 4 has a curved surface structure. The curved surface of the bubble cover and the structure with gradually increasing diameter are combined with the spiral structure of the guide plate, that is, the gas flow channel gradually increases along the gas flow direction, which can not only further increase the maximum allowable airflow velocity of the bubble tower and improve the dehydration efficiency, but also further reduce the tower plate pressure drop; in addition, this structure also increases the flow rate of the tangential rotational motion of the airflow, thereby improving the contact efficiency between the airflow and the liquid.

[0053] In one embodiment, the number of the ventilation holes 3 is 8 to 12.

[0054] In one embodiment, the riser 1 and the bubble cap 4 are fixedly connected by bolts.

[0055] In one embodiment, the helix angle of the guide plate 2 is 25-45°.

[0056] In one embodiment, the pitch between the guide plates 2 is 215-300 mm.

[0057] In one embodiment, a plurality of flow-increasing plates 5 are provided along the circumferential direction between two adjacent flow guide plates 2 at the inner bottom of the bubble cover 4, and the inclination direction of the flow-increasing plates also matches the inclination direction of the flow guide plates, and the width of the flow-increasing plates 5 is 1 / 4 to 1 / 3 of the width of the flow guide plates. The present invention provides a flow-increasing plate at the bottom of the bubble cover 4, and when the gas rotates to the bottom of the bubble cover, it is divided into smaller fluids by the flow-increasing plate, which can increase the airflow velocity and pressure when the airflow contacts the liquid at the outlet of the gas, further increase the gas-liquid mixing area, and improve the gas-liquid mixing rate and the wet purified gas dehydration rate.

[0058] Example 2

[0059] An embodiment of the present invention also provides a novel cyclone bubble dehydration tower for gas-liquid reaction, comprising a plurality of bubble structures and a tower plate 6, wherein the bubble structure comprises an air riser 1, on the outer wall of which guide plates 2 are evenly arranged in sequence along the circumferential direction; the guide plates 2 are in a spiral blade structure; air vents 3 are provided between two adjacent guide plates 2 on the wall of the air riser 1; and the bubble cover 4 is also provided, wherein the bubble cover 4 is covered on the outside of the guide plate 2 from the top of the air riser 1, and the outer end of the guide plate 2 is tightly fitted with the inner wall of the bubble cover 4, the lower end of the air riser 1 passes through the tower plate 6 and is connected to the bottom of the tower plate 6, the plurality of bubble structures are arranged and distributed in an isosceles trapezoidal structure on the tower plate 6, and a bubble structure is also distributed at the center of each isosceles trapezoidal structure, wherein the length of the short side of the isosceles trapezoid is 3 / 5 of the length of the long side, and the height of the isosceles trapezoid is the same as the length of the short side.

[0060] The cyclone bubble dehydration tower of the present invention improves the bubble structure, sets a guide plate between the riser and the bubble cover, and modifies the opening position of the vent hole, so that the flow mode of the wet purified gas can be converted from axial flow along the riser to tangential cyclone. The wet purified gas flows tangentially along the tower plate under the action of the cyclone, thereby improving the mixing rate of the wet purified gas and the glycol solution and reducing the pressure drop of the wet purified gas through the bubble.

[0061] The swirl bubble structure of the present invention has an outer surface of the riser connected to the guide plate by welding or inlaying, and the guide plate and the bubble cover are kept sealed. The guide plate is used to divide the gas flow into a plurality of independent flow channels. Therefore, the wet purified gas discharged from the air vent can only flow out from the bottom of the bubble cover along the channel enclosed by the guide plate and the bubble cover, thereby converting the axial movement of the airflow into tangential rotational movement, and finally the rotating gas flows out from the gap between the bottom of the bubble cover and the tower plate, which greatly reduces the gas-liquid mixing dead zone range and increases the mixing area of ​​the wet purified gas and the triethylene glycol solution. Moreover, since the airflow is divided into a plurality of independent flow channels, the maximum allowable airflow velocity of the bubble tower is increased, which can improve the dehydration efficiency of the triethylene glycol. At the same time, by changing the bubble structure, the form in which the wet purified gas enters the tower plate is changed from countercurrent to cocurrent, thereby reducing the pressure loss between the plates and reducing the pressure drop of the wet purified gas passing through the tower plate.

[0062] The present invention improves the distribution and arrangement of the bubble cap structures on the tower plate, thereby not only ensuring the dehydration efficiency of the bubble cap tower, but also reducing the number of bubble cap structures and reducing costs.

[0063] In one embodiment, the gas channel gap between the bubble cap cover and the tray is 10 to 15 mm.

[0064] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel cyclonic bubble structure for gas-liquid reaction, comprising a riser (1), characterized in that: Guide plates (2) are evenly arranged in sequence along the circumferential direction on the outer wall of the riser (1); The guide plate (2) is in the form of a spiral blade structure; Ventilation holes (3) are provided between two adjacent guide plates (2) on the wall surface of the riser (1); It also comprises a bubble cover (4), which is arranged outside the guide plate (2) from the top of the riser (1), and the outer end of the guide plate (2) is tightly fitted with the inner wall of the bubble cover (4).

2. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The vent hole (3) has an axial inclination angle of 10 to 15°, an annular inclination angle of 30 to 60°, and the inclination direction is consistent with the spiral direction of the guide plate (2).

3. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The diameter of the bubble cover (4) gradually increases from top to bottom and the middle part of the bubble cover (4) has a curvature and presents a curved surface structure.

4. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The number of the ventilation holes (3) is 8 to 12.

5. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The riser pipe (1) and the bubble cover (4) are fixedly connected by bolts.

6. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The helix angle of the guide plate (2) is 25 to 45 degrees.

7. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: The pitch between the guide plates (2) is 215 to 300 mm.

8. A novel cyclonic bubble structure for gas-liquid reaction according to claim 1, characterized in that: A plurality of flow increasing plates (5) are arranged along the circumferential direction between two adjacent flow guide plates (2) at the inner bottom of the bubble cover (4).

9. A novel cyclone bubble dehydration tower for gas-liquid reaction, characterized in that: It comprises a plurality of bubble structures and tower plates (6) as described in any one of claims 1 to 8, wherein the lower end of the riser pipe (1) of the bubble structure passes through the tower plate (6) and is connected to the bottom of the tower plate (6), and the plurality of bubble structures are arranged and distributed on the tower plate (6) in an equilateral triangle structure.

10. A novel cyclone bubble dehydration tower for gas-liquid reaction according to claim 9, characterized in that: The gas channel gap between the bubble cap cover and the tower plate is 10 to 15 mm.

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