Gas-liquid distributor

Abstract

The utility model relates to a gas-liquid distributor which comprises a barrel and a first gas-liquid distribution assembly arranged in the barrel, the barrel is used for receiving gas-liquid materials, the first gas-liquid distribution assembly comprises a distribution disc fixedly connected with the inner side wall of the barrel and a connecting pipe arranged on the distribution disc, and the connecting pipe is arranged on the barrel. A gas phase inlet, a first liquid baffle and a liquid phase inlet are formed in the connecting pipe, the first liquid baffle is located above the gas phase inlet, the first liquid baffle at least partially shields the gas phase inlet, the liquid phase inlet is located below the gas phase inlet, and the lower end of the connecting pipe is open and penetrates through the distribution disc. The gas-liquid distributor is small in occupied space, low in pressure drop and good in fluid distribution performance.

Description

Technical Field

[0001] The present disclosure relates to the technical field of petrochemical equipment, and in particular, to a gas-liquid distributor. Background Art

[0002] The gas-liquid co-current downward fixed bed reactor is widely used in the production process of various clean oil products. In the reactor, the gas and liquid phases enter the catalyst bed after mixing and dispersion, and a chemical reaction occurs under the action of the catalyst. In a small fixed bed reactor, the catalyst loading is a key factor affecting the reaction performance. In order to achieve a better reaction effect, the loading amount needs to be increased as much as possible, which requires that the occupied space of the reactor internal components be reduced as much as possible. The gas-liquid distributor is one of the key internal components. Its main function is to achieve radial uniform distribution of the gas and liquid phases on the upper part of the catalyst bed, ensure the smooth reaction, and avoid the formation of local hot spots and coking.

[0003] The gas-liquid distributors currently used in industry are mainly for large reactors, which have the disadvantages of large space occupation and high pressure drop. Their design standards are difficult to be directly applied to the development of small gas-liquid distributors. Therefore, it is urgent to develop a gas-liquid distributor with small space occupation, low pressure drop and good fluid distribution performance. Utility Model Content

[0004] The purpose of the present disclosure is to provide a gas-liquid distributor which occupies a small space, has a low pressure drop, and has good fluid distribution performance, so as to at least partially solve the problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a gas-liquid distributor, comprising: a cylinder and a first gas-liquid distribution component arranged in the cylinder, the cylinder is used to receive gas-liquid materials, the first gas-liquid distribution component comprises a distribution plate fixedly connected to the inner side wall of the cylinder and a connecting pipe arranged on the distribution plate, the connecting pipe is provided with a gas phase inlet, a first liquid baffle plate and a liquid phase inlet, wherein the first liquid baffle plate is located above the gas phase inlet, the first liquid baffle plate at least partially blocks the gas phase inlet, the liquid phase inlet is located below the gas phase inlet, and the lower end of the connecting pipe is open and passes through the distribution plate.

[0006] Optionally, there are multiple connecting pipes, and the multiple connecting pipes are arranged at circumferential intervals along the central axis of the distribution plate; the opening rate of the distribution plate is 5%-20%.

[0007] Optionally, a flared opening is formed at the bottom end of the connecting pipe; an angle between an inner side wall of the flared opening and a central axis of the distribution plate is 30°-75°.

[0008] Optionally, the gas phase inlet is an oblique cut that is inclined from the top end of the connecting pipe toward the side wall.

[0009] Optionally, the liquid phase inlet is a circular hole, the connecting pipe is a circular pipe, and the ratio of the diameter of the liquid phase inlet to the diameter of the connecting pipe is 0.1-0.5:1.

[0010] Optionally, the gas-liquid distributor also includes a second gas-liquid distribution component, which is arranged above the first gas-liquid distribution component. The second gas-liquid distribution component includes a second liquid baffle plate, a gap is provided between the second liquid baffle plate and the inner wall of the cylinder, and a plurality of first connecting holes are provided on the second liquid baffle plate.

[0011] Optionally, a plurality of the first connection holes are arranged at intervals along the circumferential direction of the central axis of the cylinder.

[0012] Optionally, the opening rate of the second liquid baffle plate is 0.5%-5%, and / or the ratio of the inner diameter of the second liquid baffle plate to that of the cylinder is 0.5-1:1.

[0013] Optionally, an arc-shaped baffle is provided on the periphery of the connecting hole, and the arc-shaped baffle extends downward in a vertical direction.

[0014] Optionally, the second gas-liquid distribution assembly further includes a support plate, the support plate is fixedly connected to the inner wall of the cylinder, and the support plate is used to support the second liquid baffle plate.

[0015] Through the above technical scheme, a first gas-liquid distribution component is arranged in the cylinder, wherein the first gas-liquid distribution component includes a distribution plate and a plurality of connecting pipes arranged on the distribution plate, and the plurality of connecting pipes are arranged at circumferential intervals along the central axis of the distribution plate. By arranging a liquid baffle plate at the upper end of the connecting pipe, the liquid phase of the gas-liquid mixture can be radially deflected, and the gas phase of the gas-liquid mixture enters the connecting pipe through the gas phase inlet on the connecting pipe, and the liquid phase of the gas-liquid mixture enters the connecting pipe through the liquid phase inlet located below the gas phase inlet, thereby improving the problem of uneven radial distribution of the liquid phase caused by the impact of the liquid phase material on the accumulated liquid layer on the distribution plate, which is beneficial to reducing the longitudinal height of the distributor and thus reducing the overall occupied space of the distributor. At the same time, the gas-liquid diversion on the connecting pipe reduces the flow resistance of the two phases, so that the pressure drop of the distributor is significantly reduced.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1is a structural schematic diagram of a half-sectional structural schematic diagram of a gas-liquid distributor provided in an exemplary embodiment of the present disclosure;

[0019] Figure 2 for Figure 1 Sectional view along section AA;

[0020] Figure 3 for Figure 1 Sectional view along section BB;

[0021] Figure 4 It is a schematic structural diagram of a first connecting pipe provided in an exemplary embodiment of the present disclosure;

[0022] Figure 5 It is a schematic structural diagram of a second connecting pipe provided in an exemplary embodiment of the present disclosure.

[0023] Description of Reference Numerals

[0024] 1-cylinder; 2-first gas-liquid distribution component; 21-distribution plate; 22-connecting pipe; 23-first liquid baffle plate; 24-gas phase inlet; 25-liquid phase inlet; 26-expansion; 3-second gas-liquid distribution component; 31-second liquid baffle plate; 32-connecting hole; 33-arc baffle plate; 34-support plate. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" may refer to Figure 1 The arrows above and below. "Inside and outside" refer to the outline of the component itself. In addition, it should be noted that the terms used, such as "first, second", etc., are used to distinguish one element from another, and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0027] like Figure 1-Figure 5As shown, the present disclosure provides a gas-liquid distributor, comprising: a cylinder 1 and a first gas-liquid distribution component 2 arranged in the cylinder 1, the cylinder 1 is used to receive gas-liquid materials, the first gas-liquid distribution component 2 comprises a distribution plate 21 fixedly connected to the inner wall of the cylinder 1 and a connecting pipe 22 arranged on the distribution plate 21, the connecting pipe 22 is provided with a gas phase inlet 24, a first liquid baffle plate 23 and a liquid phase inlet 25, wherein the first liquid baffle plate 23 is located above the gas phase inlet 24, the first liquid baffle plate 23 at least partially blocks the gas phase inlet 24, the liquid phase inlet 25 is located below the gas phase inlet 24, and the lower end of the connecting pipe 22 is open and passes through the distribution plate 21.

[0028] Through the above technical scheme, a first gas-liquid distribution component 2 is arranged in the cylinder 1, wherein the first gas-liquid distribution component 2 includes a distribution plate 21 and a plurality of connecting pipes 22 arranged on the distribution plate 21, and the plurality of connecting pipes 22 are arranged at circumferential intervals along the central axis of the distribution plate 21. By arranging a first liquid baffle 23 at the upper end of the connecting pipe 22, the liquid phase of the gas-liquid mixture can be radially deflected, and the gas phase of the gas-liquid mixture enters the connecting pipe 22 through the gas phase inlet 24 on the connecting pipe 22, and the liquid phase of the gas-liquid mixture enters the connecting pipe 22 through the liquid phase inlet 25 located below the gas phase inlet 24, thereby improving the problem of uneven radial distribution of the liquid phase caused by the impact of the liquid phase material on the accumulated liquid layer on the distribution plate 21, which is beneficial to reducing the longitudinal height of the distributor and thus reducing the overall occupied space of the distributor. At the same time, the gas-liquid diversion on the connecting pipe 22 reduces the flow resistance of the two phases, so that the pressure drop of the distributor is significantly reduced, and the fluid distribution performance is better.

[0029] For convenience, in some practicable embodiments, there are multiple connecting tubes 22, and multiple connecting tubes 22 are arranged at equal angles along the circumference of the central axis of the distribution plate 21. For example, the distribution plate 21 is constructed as a flat plate, and multiple connecting tubes 22 are arranged in an equilateral triangle on the distribution plate 21. The cross section of the connecting tube 22 can be circular, and the diameter can be 12-25 mm. The connecting tube 22 runs through the distribution plate 21. The multiple connecting tubes 22 can quickly flow the liquid phase after deflection into the connecting tube 22 through the liquid phase inlet 25 of the connecting tube 22, and can quickly guide the gas phase in the gas-liquid mixture into the connecting tube 22 through the gas phase inlet 24. The connecting tube 22 runs through the distribution plate 21, so that there is a height difference between the liquid phase inlet 25 on the connecting tube 22 and the distribution plate 21, so that the liquid phase first flows into the distribution plate 21 after deflection, and then enters the connecting tube 22 through the liquid phase inlet 25, so that the gas-liquid diversion on the multiple connecting tubes 22 reduces the flow resistance of the two phases, so that the pressure drop of the distributor is significantly reduced, and the fluid distribution performance is better.

[0030] It is understood that the structure of the distribution plate 21 can be any one of a flat plate or a sieve plate, the sieve plate can be any one of a slotted sieve plate or a round hole sieve plate, and the size of the slit of the slotted sieve plate or the round hole of the round hole sieve plate is 0.3-6 mm. In addition, in order to stably guide the gas phase and the liquid phase into the connecting pipe 22, in some practicable ways, the opening rate of the distribution plate 21 is 5%-20%, thereby limiting the number of connecting pipes 22, so that the gas phase and the liquid phase can quickly flow into the connecting pipe 22.

[0031] In order to facilitate the gas-phase material to enter the connecting tube 22, in some practicable embodiments, the gas-phase inlet 24 can be constructed as an oblique cut that is inclined from the top of the connecting tube 22 toward the side wall, and the first liquid baffle plate 23 is located above the gas-phase inlet 24 and completely blocks the gas-phase inlet 24, so that the liquid-phase material in the gas-liquid material entering the cylinder 1 can be dispersed by the first liquid baffle plate 23, and the gas-phase material in the gas-liquid material can enter the connecting tube 22 through the oblique cut. Of course, in order to enable the gas-phase material to quickly enter the connecting tube 22, the number of gas-phase inlets 24 can be multiple and arranged at intervals along the circumferential direction of the central axis of the cylinder 1.

[0032] In order to facilitate the rapid discharge of the gas phase and the liquid phase through the connecting pipe 22, in some feasible embodiments, a flare 26 is formed at the bottom end of the connecting pipe 22, and the flare 26 can expand the discharge space of the gas phase and the liquid phase, thereby facilitating the rapid discharge of the gas phase and the liquid phase through the connecting pipe 22.

[0033] like Figure 5 As shown, in some practicable embodiments, in order to facilitate rapid discharge of the gas phase and the liquid phase through the connecting pipe 22, the angle between the inner side wall of the expansion port 26 and the central axis of the distribution plate 21 is 30°-75°.

[0034] Of course, it can be understood that the flare 26 formed at the bottom end of the connecting pipe 22 is schematic, and in other embodiments, for example, for operating conditions with a small amount of liquid phase processing, the bottom end of the connecting pipe 22 can also be a straight mouth. For operating conditions with a large amount of liquid phase processing, the flare 26 is preferably a bell-mouth type, and as the processing amount increases, the angle between the inclined surface of the flare 26 and the horizontal plane is preferably reduced. Under operating conditions with greater operational flexibility, the flare 26 is preferably a bell-mouth type, and the angle between the inner side wall of the flare 26 and the central axis of the distribution plate 21 is 30°-75°, preferably 45°-60°.

[0035] In addition, it can be understood that in order to facilitate the rapid discharge of the gas phase and the liquid phase through the connecting pipe 22, a flow-breaking piece can also be set in the expansion port 26. The flow-breaking piece is an existing product and can be purchased. Its specific structure is not described here. The liquid phase collides with the flow-breaking piece driven by the airflow and breaks into small droplets, which is more conducive to the dispersion of the liquid phase in the lower space of the distributor.

[0036] In order to facilitate the rapid discharge of the gas phase and the liquid phase through the connecting pipe 22, in some feasible embodiments, the liquid phase inlet 25 is a circular hole, the connecting pipe 22 is a circular tube, and the ratio of the inner diameters of the liquid phase inlet 25 and the connecting pipe 22 is 0.1-0.5:1.

[0037] In addition, the structure and arrangement of the above-mentioned liquid phase inlet 25 are also schematic. In other embodiments, the structure of the liquid phase inlet 25 can be any one or more of a strip hole, a circular hole, an elliptical hole, a triangular hole or a rectangular hole. There are multiple liquid phase inlets 25 on a single connecting tube 22, and the multiple connecting tubes 22 are arranged at circumferential intervals along the central axis of the cylinder 1.

[0038] In order to further conduct flow distribution for the gas phase and the liquid phase, in some practicable embodiments, the gas-liquid distributor further comprises a second gas-liquid distribution component 3, the second gas-liquid distribution component 3 is arranged above the first gas-liquid distribution component 2, the second gas-liquid distribution component 3 comprises a second liquid baffle plate 31, a gap is arranged between the second liquid baffle plate 31 and the inner side wall of the cylinder 1, and a plurality of connecting holes 32 are arranged on the second liquid baffle plate 31. Since the second gas-liquid distribution component 3 is arranged above the first gas-liquid distribution component 2, that is, the second gas-liquid distribution component 3 is arranged upstream of the first gas-liquid distribution component 2, the gas phase and the liquid phase contact before the second gas-liquid distribution component 3, and the gas phase and the liquid phase are deflected by the second liquid baffle plate 31, and then part of the gas phase and the liquid phase materials flow out through the connecting hole 32, and the rest of the gas phase and the liquid phase materials flow out through the gap between the second liquid baffle plate 31 and the inner side wall of the cylinder 1, and then the gas phase material enters the connecting pipe 22 through the gas phase inlet 24 on the first gas-liquid distribution component 2 and the liquid phase material enters the connecting pipe 22 through the liquid phase inlet 25.

[0039] In order to facilitate the rapid diversion of the gas phase and liquid phase after being deflected by the second liquid baffle plate 31 to the first gas-liquid distribution component 2, a plurality of connecting holes 32 are provided on the second liquid baffle plate 31 to realize multi-point diversion of the liquid phase. When the liquid phase material collides with the second liquid baffle plate 31, radial deflection occurs, and then the liquid phase diffuses radially along the second liquid baffle plate 31, with part of it flowing out from the connecting hole 32, and the remaining part flowing out from the gap between the second liquid baffle plate 31 and the inner wall of the cylinder 1 to ensure greater operational flexibility.

[0040] Specifically, in some feasible embodiments, in order to facilitate the liquid phase and the gas phase to be guided to the first gas-liquid distribution component 2 through the connecting hole 32, the opening rate of the second liquid baffle plate 31 is 0.5%-5%, and the ratio of the inner diameter of the second liquid baffle plate 31 and the cylinder 1 is 0.5-1:1.

[0041] In addition, in order to improve the wall flow of the liquid phase after passing through the connecting hole 32, an arc-shaped baffle 33 is provided on the outer periphery of the connecting hole 32, and the arc-shaped baffle 33 extends downward in the vertical direction.

[0042] In order to facilitate the installation of the second liquid baffle plate 31, in some feasible methods, the second gas-liquid distribution assembly 3 also includes a support plate 34, which is fixedly connected to the inner wall of the cylinder 1, and the support plate 34 is used to support the second liquid baffle plate 31. The support plate 34 may include a center ring plate and a plurality of ear plates arranged at intervals along the circumference of the center ring plate. The ear plate is welded and fixed to the inner wall of the cylinder 1. The second liquid baffle plate 31 is placed on the support plate 34 and can be fixedly connected by bolts or by welding. In this way, the liquid phase and the gas phase can flow into the first gas-liquid distribution assembly 2 through the connecting hole 32, and also in the gap between the second liquid baffle plate 31 and the inner wall of the cylinder 1.

[0043] Example 1

[0044] The gas-liquid distributor of this embodiment is as follows Figure 1-Figure 3 As shown, the gas-liquid distributor is installed in a fixed bed reactor with an inner diameter of 200 mm. Six connecting holes 32 are arranged uniformly along the axial direction on the second gas-liquid distribution component 3, and the diameter of the connecting holes 32 is 20 mm. Thirteen connecting pipes 22 arranged in an equilateral triangle are arranged on the first gas-liquid distribution component 2. A liquid phase inlet 25 is arranged at the lower third of the connecting pipe 22, and the height of the flared opening 26 of the connecting pipe 22 is 3 mm. The liquid phase distribution performance of the gas-liquid distributor of this embodiment is analyzed by the sampling method, and the liquid phase distribution performance is characterized by the liquid phase distribution unevenness calculated by the following formula:

[0045]

[0046] in, The value is between 0-1, represents an ideal uniform distribution, Indicates that all fluid flows out through a single distribution port.

[0047] Specifically, with air as the gas phase and tap water as the liquid phase, under the operating conditions of a liquid phase flow rate of 390 L / h and a gas phase flow rate of 2 m3 / h, samples were taken at different positions of the radial cross section 200 mm below the combined gas-liquid distributor, and the liquid phase distribution unevenness was calculated to be 0.07.

[0048] Example 2

[0049] The gas-liquid distributor of this embodiment is the same as that of Embodiment 1, except that this embodiment is carried out under the operating conditions of a liquid phase flow rate of 240 L / h and a gas phase flow rate of 1.35 m3 / h, and adopts the same sampling and data processing method as Embodiment 1, and the liquid phase distribution unevenness is calculated to be 0.07.

[0050] Example 3

[0051] The gas-liquid distributor described in this embodiment is the same as that in Embodiment 1, except that this embodiment is carried out under the operating conditions of a liquid phase flow rate of 110 L / h and a gas phase flow rate of 0.6 m3 / h, and adopts the same sampling and data processing method as in Embodiment 1, and the liquid phase distribution unevenness is calculated to be 0.10.

[0052] In this way, the gas-liquid distributor in this embodiment can achieve radially uniform distribution of the liquid phase, while reducing the occupied space and flow pressure drop of the distributor.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A gas-liquid distributor, characterized in that: include: A cylinder and a first gas-liquid distribution component arranged in the cylinder, the cylinder is used to receive gas-liquid materials, the first gas-liquid distribution component includes a distribution plate fixedly connected to the inner wall of the cylinder and a connecting pipe arranged on the distribution plate, the connecting pipe is provided with a gas phase inlet, a first liquid baffle plate and a liquid phase inlet, wherein the first liquid baffle plate is located above the gas phase inlet, the first liquid baffle plate at least partially blocks the gas phase inlet, the liquid phase inlet is located below the gas phase inlet, and the lower end of the connecting pipe is open and passes through the distribution plate.

2. The gas-liquid distributor according to claim 1, characterized in that: There are multiple connecting pipes, and the multiple connecting pipes are arranged at intervals along the circumferential direction of the central axis of the distribution plate; The opening rate of the distribution plate is 5%-20%.

3. The gas-liquid distributor according to claim 1, characterized in that: The bottom end of the connecting pipe is expanded; The angle between the inner side wall of the expansion opening and the central axis of the distribution plate is 30°-75°.

4. The gas-liquid distributor according to claim 1, characterized in that: The gas phase inlet is an oblique cut that is inclined from the top end of the connecting pipe toward the side wall.

5. The gas-liquid distributor according to claim 1, characterized in that: The liquid phase inlet is a circular hole, the connecting pipe is a circular pipe, and the ratio of the inner diameters of the liquid phase inlet and the connecting pipe is 0.1-0.5:

1.

6. The gas-liquid distributor according to any one of claims 1 to 5, characterized in that: The gas-liquid distributor also includes a second gas-liquid distribution component, which is arranged above the first gas-liquid distribution component. The second gas-liquid distribution component includes a second liquid baffle plate, a gap is provided between the second liquid baffle plate and the inner wall of the cylinder, and a plurality of connecting holes are provided on the second liquid baffle plate.

7. The gas-liquid distributor according to claim 6, characterized in that: The plurality of connection holes are arranged at intervals along the circumferential direction of the central axis of the cylinder.

8. The gas-liquid distributor according to claim 7, characterized in that: The opening rate of the second liquid baffle plate is 0.5%-5%; and / or The ratio of the inner diameter of the second liquid baffle plate to the inner diameter of the cylinder is 0.5-1:

1.

9. The gas-liquid distributor according to claim 6, characterized in that: An arc-shaped baffle is arranged on the outer periphery of the connecting hole, and the arc-shaped baffle extends downward in a vertical direction.

10. The gas-liquid distributor according to claim 6, characterized in that: The second gas-liquid distribution assembly further includes a support plate, which is fixedly connected to the inner wall of the cylinder body and is used to support the second liquid baffle plate.

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