A slot tray gas-liquid distributor

Abstract

The utility model discloses a kind of slot disc type gas-liquid distributors, belong to the technical field of gas-liquid distributor, including liquid collecting plate, the liquid collecting plate is equipped with main gas-lifting device and auxiliary gas-lifting device, the auxiliary gas-lifting device includes auxiliary gas-lifting groove and auxiliary liquid baffle, the bottom of auxiliary gas-lifting groove is communicated with liquid collecting plate, the auxiliary liquid baffle is set in the top of auxiliary gas-lifting groove by support plate, the support plate is connected with main gas-lifting device, the auxiliary liquid baffle is V-shaped structure. The utility model increases gas distribution space by being additionally provided in liquid flow area, so that the distributor is not changed under the premise of liquid distribution effect, reduce the liquid holding capacity in distributor, increase gas phase passage area, reduce gas phase flow resistance, more suitable for rectifying column low liquid quantity, high gas quantity operating condition.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas-liquid distributors, and relates to a tray-type gas-liquid distributor, and more particularly to a novel tray-type gas-liquid distributor for distillation columns with low liquid volume and high throughput. Background Technology

[0002] Tower equipment is one of the most important pieces of equipment in chemical, petrochemical, and oil refining production processes. Based on their internal structure, towers are broadly classified into plate towers and packed towers. In packed towers, while the high performance of the packing material itself is crucial, the matching internals, especially the liquid and gas distributors, are equally vital. The more efficient the packing, the higher the need for high-performance gas-liquid distribution devices.

[0003] In distillation column internals, the tray-type distributor is an important gas-liquid distribution structure. It allows gas to pass through the distributor from below while simultaneously allowing liquid above to enter the distributor, thus achieving uniform liquid distribution. The tray-type gas-liquid distributor has three functions: liquid collection, liquid distribution, and gas separation. It features a compact structure, high operational flexibility, uniform gas-liquid distribution, low resistance, and wide application.

[0004] However, many distillation columns operate under high vacuum conditions, and the liquids are often heat-sensitive materials. The longer the liquid remains in the column, the higher the risk of thermal deterioration. Simultaneously, as the gas passes through the distributor, its flow space narrows, and its flow direction changes, creating resistance and increasing the overall pressure drop. The lower vacuum level raises the boiling point of the material, requiring higher temperatures for distillation heating and making it more susceptible to deterioration. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a tray-type gas-liquid distributor. By adding a gas distribution space to the liquid flow area, the distributor reduces the liquid holding capacity within the distributor, increases the gas phase channel area, and reduces gas phase flow resistance without altering the liquid distribution effect. This makes it more suitable for distillation columns operating under conditions of low liquid volume and high gas volume.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A tray-type gas-liquid distributor includes a liquid collection plate. The liquid collection plate is provided with a main gas lifting device and an auxiliary gas lifting device. The auxiliary gas lifting device includes an auxiliary gas lifting trough and an auxiliary liquid shielding plate. The bottom of the auxiliary gas lifting trough is connected to the liquid collection plate. The auxiliary liquid shielding plate is provided on the top of the auxiliary gas lifting trough through a support plate. The support plate is connected to the main gas lifting device. The auxiliary liquid shielding plate has a V-shaped structure.

[0008] By adopting the above technical solution, the distributor is equipped with a main air lifting device and an auxiliary air lifting device. Gas can rise from the main air lifting device and the auxiliary air lifting device and pass through the distributor, while liquid flows in the space above the liquid collecting plate. Due to the existence of the auxiliary air lifting groove, the liquid flow space is reduced and the liquid holding capacity is reduced, so that it flows out from the main air lifting device with a smaller liquid volume or residence time.

[0009] Furthermore, the main air lifting device includes a main air lifting trough and a main liquid shielding plate. The bottom of the main air lifting trough is connected to the liquid collecting plate, and the main liquid shielding plate is mounted on the top of the main air lifting trough via a support plate. The support plate is mounted on the top of the main air lifting trough. A distribution port is provided at the lower part of the main air lifting trough, and an overflow hole is provided at the upper part of the main air lifting trough. A distribution pipe is provided inside the main air lifting trough, and the distribution port and overflow hole are respectively located at the lower and upper parts of the distribution pipe.

[0010] By adopting the above technical solution, the liquid flowing down from above the distributor is blocked by the liquid shielding plate and flows into the space between the gas riser and the inner wall of the tower. The liquid level rises to the overflow hole and flows from the overflow hole to the distribution pipe, and finally flows out from the distribution port to the surface of the packing below the distributor. The gas escapes from the main gas riser and auxiliary gas riser below the distributor to the top of the distributor. After being blocked by the main liquid shielding plate and the auxiliary liquid shielding plate, it escapes from both sides of the main liquid shielding plate and the auxiliary liquid shielding plate and enters the packing above the distributor.

[0011] Furthermore, the main air riser and the auxiliary air riser are distributed at intervals.

[0012] By adopting the above technical solution, in addition to the main air riser and the main liquid shield, the distributor is equipped with an auxiliary air riser between the main air risers. The auxiliary air riser no longer has a distribution port and a distribution pipe. Gas can rise from the main air riser, the auxiliary air riser, the main liquid shield and the auxiliary liquid shield and pass through the distributor. Liquid flows in the space above the liquid collection plate. Due to the existence of the auxiliary air riser, the liquid flow space is reduced and the liquid holding capacity is reduced. Finally, it flows out from the distribution port on the side of the main air riser with a smaller liquid volume or residence time.

[0013] Furthermore, the height of the main liquid-blocking plate is higher than the height of the auxiliary liquid-blocking plate.

[0014] By adopting the above technical solution, the descending liquid received on the main shielding plate can flow into the collecting plate from both sides of the auxiliary shielding plate, and finally flow by gravity from the distribution port of the distribution pipe to the bottom of the distributor.

[0015] Furthermore, the distribution pipes are provided in multiple forms and are evenly distributed inside the main air riser.

[0016] By adopting the above technical solution, liquid overflow is facilitated, and it eventually flows out from the distribution port to the packing surface below the distributor.

[0017] Furthermore, the bottom of both the main air riser and the distribution pipe is provided through the liquid collection plate, and the bottom of the distribution pipe is located below the bottom of the main air riser.

[0018] By adopting the above technical solution, the rising gas phase below the distributor can be effectively realized to rise from the main rising gas tank to the top of the distributor, and the liquid phase in the distributor can flow by gravity from the distribution port of the distribution pipe to the bottom of the distributor and be evenly distributed.

[0019] Furthermore, the main liquid shielding plate has a V-shaped structure.

[0020] By adopting the above technical solution, it is easy for gas to escape from both sides of the main liquid shield and enter the packing above the distributor.

[0021] Furthermore, the main air lifting channel and the auxiliary air lifting channel are connected by a connecting plate.

[0022] By adopting the above technical solution, the stability of the installation of the main air riser and the auxiliary air riser can be improved by using the connecting plate.

[0023] Furthermore, the liquid collection plate has mounting holes.

[0024] By adopting the above technical solution, the distributor can be fixed inside the distillation column with bolts.

[0025] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0026] The distributor of this invention has a simple structure and is particularly suitable for distillation under high vacuum and low liquid volume conditions. While ensuring the distribution effect remains unchanged, it reduces the space occupied by liquid and increases the space for gas passage, thereby reducing the operating pressure drop and the liquid hold-up, which is more conducive to the distillation and purification of heat-sensitive materials. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Liquid collection plate; 2. Main air lifting device; 21. Main air lifting trough; 22. Main liquid shielding plate; 3. Distribution pipe; 4. Auxiliary air lifting device; 41. Auxiliary air lifting trough; 42. Auxiliary liquid shielding plate; 51. Distribution port; 52. Overflow hole; 6. Support plate; 7. Connecting plate; 8. Mounting hole. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0031] This utility model discloses a tray-type gas-liquid distributor.

[0032] Reference Figure 1 and Figure 2 A tray-type gas-liquid distributor includes a collection plate 1, on which a main gas lifting device 2 and an auxiliary gas lifting device 4 are installed. The main gas lifting device 2 and the auxiliary gas lifting device 4 are distributed at intervals. In addition to the main gas lifting device 2, the distributor is also provided with the auxiliary gas lifting device 4. Gas can rise from the main gas lifting device 2 and the auxiliary gas lifting device 4 and pass through the distributor. Liquid flows in the space above the collection plate 1, which reduces the liquid flow space and the liquid holding capacity. Finally, it flows out from the main gas lifting device 2 with a smaller liquid volume or residence time.

[0033] The main air lifting device 2 includes a main air lifting trough 21 and a main liquid shielding plate 22. The bottom of the main air lifting trough 21 is connected to the liquid collecting plate 1. Multiple main air lifting troughs 21 are provided and are evenly distributed along the liquid collecting plate 1. The main liquid shielding plate 22 is provided on the top of the main air lifting trough 21 by a support plate 6, and the support plate 6 is fixed to the top of the main air lifting trough 21.

[0034] The main riser trough 21 has a distribution port 51 at its lower part and an overflow hole 52 at its upper part. A distribution pipe 3 is installed inside the main riser trough 21, with the distribution port 51 at its lower part and the overflow hole 52 at its upper part. Liquid flowing down from above the distributor is blocked by a liquid shield and flows into the space between the riser trough and the inner wall of the tower. The liquid level rises to the overflow hole 52 and flows from the overflow hole 52 to the distribution pipe 3, finally flowing out from the distribution port 51 onto the packing surface below the distributor. It should be noted that the overflow hole 52 is used for liquid overflow under abnormal operating conditions such as a sudden increase in liquid volume on the distributor; it is not needed under normal operating conditions.

[0035] The distribution pipes 3 are provided in multiple parts and are evenly distributed inside the main air riser trough 21 to facilitate liquid overflow, which eventually flows out from the distribution port 51 to the packing surface below the distributor.

[0036] The bottom of both the main rising gas trough 21 and the distribution pipe 3 is provided through the liquid collection plate 1, and the bottom of the distribution pipe 3 is located below the bottom of the main rising gas trough 21. This can effectively realize that the rising gas phase below the distributor rises from the main rising gas trough 21 to the top of the distributor, and the liquid phase in the distributor flows by gravity from the distribution port 51 of the distribution pipe 3 to the bottom of the distributor and is evenly distributed.

[0037] The main liquid shielding plate 22 has a V-shaped structure, which facilitates the gas to escape from both sides of the main liquid shielding plate 22 and enter the packing above the distributor.

[0038] The auxiliary air lifting device 4 includes an auxiliary air lifting trough 41 and an auxiliary liquid shielding plate 42. The bottom of the auxiliary air lifting trough 41 is connected to the liquid collecting plate 1, and the auxiliary liquid shielding plate 42 is mounted on the top of the auxiliary air lifting trough 41 via a support plate 6. The auxiliary liquid shielding plate 42 has a V-shaped structure. Gas escapes from the main air lifting trough 21 and the auxiliary air lifting trough 41 below the distributor to the top of the distributor. After being blocked by the main liquid shielding plate 22 and the auxiliary liquid shielding plate 42, it escapes from both sides of the main liquid shielding plate 22 and the auxiliary liquid shielding plate 42, and enters the packing above the distributor. Due to the presence of the auxiliary air lifting trough 41, the liquid flow space is reduced, the liquid holding capacity is decreased, and finally, the liquid flows out from the distribution port 51 on the side of the main air lifting trough 21 with a smaller liquid volume or residence time.

[0039] The main air riser 21 and the auxiliary air riser 41 are distributed at intervals. In addition to the main air riser 21 and the main liquid shielding plate 22, the distributor is provided with an auxiliary air riser 41 between the main air riser 21. The auxiliary air riser 41 is not provided with a distribution port 51 and a distribution pipe 3. Gas can rise from the main air riser 21, the auxiliary air riser 41, the main liquid shielding plate 22 and the auxiliary liquid shielding plate 42 and pass through the distributor. Liquid flows in the space above the liquid collection plate 1.

[0040] The main air lifting channel 21 and the auxiliary air lifting channel 41 are connected by a connecting plate 7, which can improve the stability of the installation of the main air lifting channel 21 and the auxiliary air lifting channel 41.

[0041] The height of the main liquid shielding plate 22 is higher than that of the auxiliary liquid shielding plate 42, so that the descending liquid received on the main liquid shielding plate 22 can flow into the liquid collection plate 1 from both sides of the auxiliary liquid shielding plate 42, and finally flow from the distribution port 51 of the distribution pipe 3 to the bottom of the distributor.

[0042] The liquid collecting plate 1 has multiple mounting holes 8 evenly distributed around its circumference, which can be used to fix the distributor inside the distillation column with bolts.

[0043] The tray-type gas-liquid distributor of this utility model has a simple structure and is particularly suitable for distillation under high vacuum and low liquid volume conditions. It also distributes liquid materials evenly without increasing the installation height of the equipment, but can effectively reduce the pressure drop of the distributor, reduce the liquid hold-up, reduce the liquid residence time, ensure the efficiency of mass transfer and separation, and reduce material loss.

[0044] Tests have proven that this invention is highly practical, especially suitable for heat-sensitive materials requiring high-vacuum distillation, reducing distributor pressure drop by 10-20% and liquid phase retention time by 10-20%.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tray-type gas-liquid distributor, comprising a liquid collecting plate (1), characterized in that: The liquid collection plate (1) is provided with a main air lifting device (2) and an auxiliary air lifting device (4). The auxiliary air lifting device (4) includes an auxiliary air lifting groove (41) and an auxiliary liquid shielding plate (42). The bottom of the auxiliary air lifting groove (41) is connected to the liquid collection plate (1). The auxiliary liquid shielding plate (42) is located on the top of the auxiliary air lifting groove (41) through a support plate (6). The support plate (6) is connected to the main air lifting device (2). The auxiliary liquid shielding plate (42) has a V-shaped structure.

2. The tray-type gas-liquid distributor according to claim 1, characterized in that: The main air lifting device (2) includes a main air lifting trough (21) and a main liquid shielding plate (22). The bottom of the main air lifting trough (21) is connected to the liquid collecting plate (1). The main liquid shielding plate (22) is provided on the top of the main air lifting trough (21) through a support plate (6). The support plate (6) is provided on the top of the main air lifting trough (21). A distribution port (51) is provided at the lower part of the main air lifting trough (21), and an overflow hole (52) is provided at the upper part of the main air lifting trough (21). A distribution pipe (3) is provided inside the main air lifting trough (21). The distribution port (51) and the overflow hole (52) are respectively located at the lower and upper parts of the distribution pipe (3).

3. A tray-type gas-liquid distributor according to claim 2, characterized in that: The main air riser (21) and the auxiliary air riser (41) are distributed at intervals.

4. A tray-type gas-liquid distributor according to claim 2, characterized in that: The height of the main liquid shielding plate (22) is higher than the height of the auxiliary liquid shielding plate (42).

5. A tray-type gas-liquid distributor according to claim 2, characterized in that: The distribution pipe (3) is provided in multiple parts and is evenly distributed inside the main air riser (21).

6. A tray-type gas-liquid distributor according to claim 2, characterized in that: The bottom of both the main air riser (21) and the distribution pipe (3) is provided through the liquid collection plate (1), and the bottom of the distribution pipe (3) is located below the bottom of the main air riser (21).

7. A tray-type gas-liquid distributor according to claim 2, characterized in that: The main liquid shield (22) has a V-shaped structure.

8. A tray-type gas-liquid distributor according to claim 2, characterized in that: The main air riser (21) and the auxiliary air riser (41) are connected by a connecting plate (7).

9. A tray-type gas-liquid distributor according to claim 2, characterized in that: The liquid collection plate (1) has mounting holes (8).

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