Fluid collection-mixing-uniform distribution equipment, application thereof and simulated moving bed device

Abstract

The invention relates to the field of petrochemical industry adsorption separation, and discloses fluid collection-mixing-uniform distribution equipment, application thereof and a simulated moving bed device. The fluid collection-mixing-uniform distribution equipment comprises a fluid injection and extraction pipeline, a fluid collection chamber, a fluid collection plate and a fluid uniform distribution plate which are sequentially arranged along the flowing trend of fluid; the fluid collection chamber is used for changing the flowing direction of fluid injected through the fluid injection and extraction pipeline; a fluid flowing channel is formed in the fluid collecting plate and is used for distributing fluid from the fluid collecting chamber for the first time; the fluid uniform distribution plate is used for carrying out secondary distribution on the fluid from the fluid collection plate and comprises a first area located under the fluid circulation channel and a second area outside the first area, and the circulation capacity of the second area is larger than that of the first area. The fluid collected by the equipment disclosed by the invention can obtain uniform speed distribution and component distribution.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of petroleum chemical adsorption separation, in particular to a fluid collecting-mixing-distributing equipment and its application and a simulated moving bed device. BACKGROUND

[0002] In the field of petroleum chemical industry, the process of realizing the continuous contact between fluid and solid particles in a container filled with solid particles is widely used in adsorption separation and catalytic reaction processes. Adsorption separation is a technology commonly used in the field of petroleum chemical industry, which is used to separate similar boiling point mixtures that cannot be separated by distillation. In adsorption separation, common chemical processes include fixed bed, moving bed and simulated moving bed, among which simulated moving bed is the most widely used equipment. Simulated moving bed realizes continuous separation and purification process by injecting materials at different heights of the container to change the component balance of the materials in the tower, so that the adsorbed solid materials move upward in the opposite direction. Simulated moving bed can avoid the wear and loss of adsorbent, and has better separation capacity than fixed bed and moving bed.

[0003] In the prior art, two or even multiple solid particle bed layers are usually arranged inside the simulated moving bed device, and a fluid distribution equipment is arranged between the solid particle bed layers. When the fluid flows through the inside of the simulated moving bed, the fluid in each previous bed layer is redistributed to the next bed layer, and after multiple redistribution, the speed unevenness of the flow during the flow process is reduced, and the operation efficiency of the whole device is improved.

[0004] CN201592090U discloses a fluid collecting, mixing and distributing device, which is characterized by arranging a plurality of labyrinth members inside for strengthening fluid mixing and distribution. However, the pressure drop is relatively high, and the problem of uneven fluid mixing and distribution is prone to occur in large devices.

[0005] CN101056684B discloses a mixer-distributor-collector device for solid particle beds in a fluid-solid contact container. The device has good distribution effect on the fluid in the container, but the fluid flow path in the device is relatively long and the symmetry is poor, there is obvious flow deviation, and the high-speed jet flow generated locally also affects the fluid distribution effect of the downstream bed layer.

[0006] CN203899577U discloses a fluid mixing and distributing device and a tower, which is characterized by arranging a plurality of buffer chambers and baffles in communication with each other, so as to form a bending flow channel between the fluid inlet and the fluid outlet, and arranging a fluid baffle at the fluid outlet for fluid distribution. However, the internal structure of this structure is complex, the fluid passing path is relatively long, and the fluid needs to be turned multiple times, so the pressure drop is relatively large.

[0007] In summary, the main problems with existing technologies for simulating fluid collection, mixing, and uniform distribution within a moving bed container are as follows:

[0008] (1) The fluid flows too far in the equipment, which leads to the formation of dead zones and stagnation of fluid components.

[0009] (2) It cannot adapt to various specifications and types of containers and related processes, and has limited effectiveness in solving problems of fluid uniformity and equipment scale-up;

[0010] (3) When the fluid is redistributed to the bed through the collection-mixing-distribution equipment, undesirable flow phenomena such as impact and deflection are likely to occur at the top of the bed. Summary of the Invention

[0011] The purpose of this invention is to overcome the problems existing in the prior art and provide a fluid collection-mixing-uniform distribution device, its application, and a simulated moving bed device. The fluid collected by the device described in this invention can achieve a uniform velocity and composition distribution.

[0012] To achieve the above objectives, the first aspect of the present invention provides a fluid collection-mixing-uniform distribution device, the fluid collection-mixing-uniform distribution device comprising fluid injection and extraction pipelines, a fluid collection chamber, a fluid collection plate and a fluid uniform distribution plate arranged sequentially along the fluid flow trend;

[0013] The fluid collection chamber is used to change the flow direction of the fluid injected through the fluid injection and extraction lines;

[0014] The fluid collection plate is provided with a fluid flow channel for distributing the fluid from the fluid collection chamber in one step.

[0015] The fluid distribution plate is used to redistribute the fluid from the fluid collection plate, including a first region located directly below the fluid flow channel and a second region outside the first region, wherein the flow capacity of the second region is greater than that of the first region.

[0016] The second aspect of the present invention provides an application of the fluid collection-mixing-uniform distribution device described in the first aspect in adsorption separation in a simulated moving bed device.

[0017] A third aspect of the present invention provides a simulated moving bed device, the device comprising two or more vertically arranged solid particle beds and a fluid collection-mixing-distribution device disposed between two of the solid particle beds;

[0018] The fluid collection-mixing-uniform distribution device is the same as the fluid collection-mixing-uniform distribution device described in the first aspect.

[0019] The beneficial effects of the present invention through the above technical solution include:

[0020] The fluid collection-mixing-uniform distribution device provided by this invention has a simple internal structure with few flow guiding elements, which can reduce the flow path of the fluid in the device and minimize the dead zone of the flow inside the device. The unique fluid uniform distribution plate helps to eliminate or reduce the undesirable flow phenomena that occur in the solid particle bed of the simulated moving bed device, so that the fluid can achieve a uniform velocity distribution and component distribution.

[0021] In a preferred embodiment, the fluid distribution plate provided by the present invention can be adjusted in various ways to adapt to various forms of devices and working modes, thereby further enabling the fluid to achieve uniform flow and reducing the interference of high-speed fluid on the solid particle bed of the simulated moving bed device.

[0022] The fluid collection-mixing-uniform distribution device provided by this invention can provide a variety of shapes to adapt to the usage requirements of various scales and forms of simulated moving bed devices, and solve the problems of fluid uniformity and equipment scale-up. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of a simulated moving bed device provided by the present invention;

[0024] Figure 2 This is a cross-sectional schematic diagram of a fluid collection-mixing-uniform distribution device provided by the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of a fluid collection plate in a preferred embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0028] Figure 6 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0029] Figure 7 This is a side view of a fluid distribution plate with a strip screen installed in a preferred embodiment of the present invention.

[0030] Figure 8 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0031] Figure 9 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0032] Figure 10 This is a cross-sectional schematic diagram of a fluid collection plate in a preferred embodiment of the present invention;

[0033] Figure 11 This is a cross-sectional schematic diagram of a fluid distribution plate in a preferred embodiment of the present invention;

[0034] Figure 12 This is a device speed distribution cloud map of Comparative Example 1 of the present invention;

[0035] Figure 13 This is a device speed distribution cloud map of Embodiment 1 of the present invention;

[0036] Figure 14 This is a device speed distribution cloud map of Embodiment 2 of the present invention.

[0037] Explanation of reference numerals in the attached figures

[0038] exist Figures 1-11 middle,

[0039] 1. Fluid collection-mixing-distribution equipment; 2. Fluid injection and extraction pipelines; 3. Fluid collection chamber; 4. Fluid mixing chamber; 5. Fluid collection plate; 6. Circulating discharge pipeline; 7. Fluid distribution plate; 8. Impact-resistant screen plate; 9. Circulating feed pipeline; 10. Solid particle bed; 11. Solid particle support screen; 12. Fluid flow channel; 13. Second zone; 14. First zone; 15. Strip screen. Detailed Implementation

[0040] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0041] In this invention, the aperture diameter refers to the diameter of the opening.

[0042] In this invention, "open area ratio" refers to the ratio of the total area of ​​the openings to the area of ​​the planar region on the plane of the holes.

[0043] The first aspect of the present invention provides a fluid collection-mixing-uniform distribution device 1, the fluid collection-mixing-uniform distribution device 1 including fluid injection and extraction pipelines 2, fluid collection chamber 3, fluid collection plate 5 and fluid uniform distribution plate 7 arranged sequentially along the fluid flow trend;

[0044] The fluid collection chamber 3 is used to change the flow direction of the fluid injected through the fluid injection and extraction lines 2;

[0045] The fluid collection plate 5 is provided with a fluid flow channel 12 for distributing the fluid from the fluid collection chamber 3 in one step.

[0046] The fluid distribution plate 7 is used to perform secondary distribution of the fluid from the fluid collection plate 5, including a first region 14 located directly below the fluid flow channel 12 and a second region 13 outside the first region 14, wherein the flow capacity of the second region 13 is greater than that of the first region 14.

[0047] The fluid collection-mixing-distribution device provided by this invention collects, mixes, and redistributes fluid. Through a unique internal fluid distribution element (fluid distribution plate), it achieves uniform fluid distribution across the solid particle bed cross-section, effectively avoiding undesirable flow patterns when fluid passes through the solid particle bed. This device is adaptable to simulated moving bed adsorption separation processes of various scales and tower requirements.

[0048] In this invention, the fluid flow trend mainly refers to the vertical flow trend of the fluid from top to bottom.

[0049] When the fluid collection-mixing-uniform distribution device of the present invention is applied to a simulated moving bed device, one fluid collection-mixing-uniform distribution device 1 can be set at the same height, or multiple fluid collection-mixing-uniform distribution devices 1 can be set, preferably multiple fluid collection-mixing-uniform distribution devices 1.

[0050] It should be noted that when a fluid collection-mixing-uniform distribution device 1 is installed, the cross-sectional area of ​​the fluid collection plate 5 in the fluid collection-mixing-uniform distribution device 1 is equal to the cross-sectional area of ​​the device, and the cross-sectional area of ​​the fluid uniform distribution plate 7 is equal to the cross-sectional area of ​​the device.

[0051] When multiple fluid collection-mixing-uniform distribution devices 1 are installed, the total cross-sectional area of ​​the fluid collection plates 5 in the multiple fluid collection-mixing-uniform distribution devices 1 is equal to the cross-sectional area of ​​the device, and the total cross-sectional area of ​​the fluid uniform distribution plates 7 in the multiple fluid collection-mixing-uniform distribution devices 1 is equal to the cross-sectional area of ​​the device.

[0052] In the simulated moving bed device, the number of fluid collection-mixing-distribution devices 1 arranged at the same height is determined by the volume of the simulated moving bed device containing the solid particle bed layer. According to a preferred embodiment of the present invention, the number of fluid collection-mixing-distribution devices 1 at the same height in the simulated moving bed device is 3-28. Using this preferred embodiment, circular or irregularly shaped containers can be uniformly divided into areas equal to the area of ​​the device, adapting to various types of containers.

[0053] When multiple fluid collection-mixing-distribution devices 1 are arranged at the same height in the simulated moving bed device, according to a preferred embodiment of the present invention, the fluid collection plate 5 and the fluid distribution plate 7 are each independently rectangular or fan-shaped.

[0054] It should be noted that the rectangle and sector mentioned in this invention can be square or sector in the narrow sense, or they can be rectangles or sectors that are not completely regular.

[0055] According to a more preferred embodiment of the present invention, the fluid collecting plate 5 and the fluid distribution plate 7 have the same shape, and are more preferably rectangular.

[0056] In this invention, the fluid collection plate 5 and the fluid distribution plate 7 are arranged at intervals.

[0057] The fluid collection plate 5 of the present invention includes a guide plate that guides the fluid to converge towards the center and a baffle plate that performs the collection function. The surface of the fluid collection plate 5 is provided with a fluid flow channel 12. The function of the fluid collection plate 5 is to collect the fluid again and converge it into the fluid flow channel 12 so that it flows downward.

[0058] The fluid collection plate 5 of the present invention may have one fluid flow channel 12 or multiple fluid flow channels 12. Preferably, the fluid collection plate 5 of the present invention has multiple fluid flow channels 12, and the specific configuration is described below.

[0059] According to a preferred embodiment of the present invention, the ratio of the total cross-sectional area of ​​the fluid flow channel 12 to the cross-sectional area of ​​the fluid collection plate 5 is 1:(20-200), preferably 1:(30-150).

[0060] According to a preferred embodiment of the present invention, each fluid flow channel 12 has an equal cross-sectional area. This preferred embodiment ensures that the downward flow velocity and flow rate of the fluid are equal.

[0061] The fluid flow channel 12 described in this invention can be a regular shape or an irregular shape, such as a circle, a square, or a long strip.

[0062] When the fluid collecting plate 5 is rectangular, the present invention does not particularly limit the specific arrangement (position, number, etc.) of the fluid flow channels 12 on the fluid collecting plate 5 along the width direction of the fluid collecting plate 5. The arrangement can be appropriately selected based on the volume of the simulated moving bed device containing solid particles and the internal fluid flow rate of the simulated moving bed device. According to a preferred embodiment of the present invention, at least two rows of fluid flow channels 12 are arranged along the width direction of the fluid collecting plate 5.

[0063] When the fluid collecting plate 5 is rectangular, according to a preferred embodiment of the present invention, at least two rows of fluid flow channels 12 are arranged on both sides of the fluid collecting chamber 3 along the width direction of the fluid collecting plate 5. This preferred embodiment maximizes the arrangement of fluid flow channels and facilitates uniform collection of fluid centered on the fluid collecting chamber 3, avoiding uneven flow or deviation of fluid passing through the fluid flow channels 12.

[0064] According to a more preferred embodiment of the present invention, when two rows of fluid flow channels 12 are arranged along the width direction of the fluid collection plate 5, the two rows of fluid flow channels 12 are arranged in abutment with the fluid collection chamber 3, as can be referred to Figure 3 .

[0065] When the fluid collection plate 5 is rectangular, according to a preferred embodiment of the present invention, the arrangement direction of each row of fluid flow channels 12 is parallel to the length direction of the fluid collection plate 5.

[0066] When the fluid collecting plate 5 is rectangular, the fluid flow channel 12 of the present invention can be a single channel, a dual channel, or even more channels along the length direction of the fluid collecting plate 5, depending on the volume of the simulated moving bed device containing solid particles and the fluid flow rate inside the simulated moving bed device. According to a preferred embodiment of the present invention, the fluid flow channels 12 are evenly arranged along the length direction of the fluid collecting plate 5.

[0067] When the fluid collecting plate 5 is fan-shaped, the present invention does not particularly limit the specific arrangement (position, number, etc.) of the fluid flow channels 12 on the fluid collecting plate 5 along the radial direction of the fluid collecting plate 5. The arrangement can be appropriately selected based on the volume of the simulated moving bed device containing solid particles, the internal fluid flow rate of the simulated moving bed device, and the number of collection-mixing-distribution devices. According to a preferred embodiment of the present invention, the fluid collecting plate 5 is fan-shaped, and at least two rows of fluid flow channels 12 are arranged along the radial direction of the fluid collecting plate 5.

[0068] When the fluid collection plate 5 is fan-shaped, according to a preferred embodiment of the present invention, at least two rows of fluid flow channels 12 are arranged on both sides of the fluid collection chamber 3 along the radial direction of the fluid collection plate 5. This preferred embodiment maximizes the collection of fluid from both ends of the fan-shaped area to the fluid flow channels 12, effectively eliminating the impact of uneven component flow in the upper solid bed on the downstream bed.

[0069] According to a preferred embodiment of the present invention, when two rows of fluid flow channels 12 are arranged along the radial direction of the fluid collection plate 5, the two rows of fluid flow channels 12 are arranged in contact with the fluid collection chamber 3, as can be referred toFigure 10 .

[0070] When the fluid collecting plate 5 is fan-shaped, according to a preferred embodiment of the present invention, the arrangement direction of each row of fluid flow channels 12 is parallel to the tangent direction of the arc of the fluid collecting plate 5.

[0071] When the fluid collecting plate 5 is fan-shaped, the fluid flow channel 12 of the present invention can be a single channel, a dual channel, or even more channels along the tangent direction of the arc of the fluid collecting plate 5, depending on the volume of the simulated moving bed device containing solid particles, the internal fluid flow rate of the simulated moving bed device, and the number of collection-mixing-distribution devices. According to a preferred embodiment of the present invention, the fluid flow channels 12 are evenly arranged along the tangent direction of the arc of the fluid collecting plate 5.

[0072] The function of the fluid distribution plate 7 described in this invention is to distribute the fluid moving downward through the fluid flow channel 12 to the entire cross section of the fluid distribution plate 7, so as to improve or maintain the uniform distribution of fluid velocity across the entire cross section.

[0073] The fluid distribution plate 7 of the present invention can be horizontally arranged or at a certain angle to the horizontal plane. According to a preferred embodiment of the present invention, the angle between the bottom surface of the fluid distribution plate 7 and the horizontal plane is not greater than 30°, preferably not greater than 20°.

[0074] The fluid distribution plate 7 of this invention is divided into two regions: a first region 14 and a second region 13, and the flow capacity of the second region 13 is greater than that of the first region 14. In this invention, the greater flow capacity of the second region 13 than that of the first region 14 means that the fluid tends to flow (mainly) towards the second region 13 on the fluid distribution plate 7, and flows from the second region 13 to the next section, so as to achieve fluid uniformity.

[0075] According to a preferred embodiment of the present invention, the second region 13 is provided with openings evenly distributed.

[0076] According to a preferred embodiment of the present invention, the aperture of the opening in the second region 13 is 1-10 mm, preferably 1-4 mm.

[0077] The present invention controls the aperture of the second region 13 within the above-mentioned range, which is beneficial to stabilize and adjust the fluid flow rate at the fluid distribution plate 7.

[0078] The present invention does not particularly limit the spacing between two adjacent openings in the second region 13, but can make appropriate selections according to specific circumstances, so as to achieve the purpose of the flow capacity of the second region 13 being greater than that of the first region 14.

[0079] In this invention, "the distance between two adjacent openings" refers to the shortest distance between two adjacent openings.

[0080] In this invention, the openings in the second region 13 can be arranged at equal intervals or at unequal intervals; this invention does not require them to be arranged at equal intervals.

[0081] In this invention, the arrangement of the first region 14 on the fluid distribution plate 7 (e.g., its position, area, etc.) depends on the specific arrangement of the fluid flow channel 12 located directly above it.

[0082] According to a preferred embodiment of the present invention, the cross-sectional width of the first region 14 is 1-4 times, preferably 1.2-3 times, the cross-sectional width of the fluid flow channel 12. This preferred embodiment ensures that the fluid passing through the fluid flow channel 12 accurately enters the fluid distribution area of ​​the fluid distribution plate 7, preventing channeling of the fluid inside the device.

[0083] It should be noted that when both the fluid collecting plate 5 and the fluid distribution plate 7 are rectangular, the width refers to the width direction along the fluid collecting plate 5 and the fluid distribution plate 7; when both the fluid collecting plate 5 and the fluid distribution plate 7 are fan-shaped, the width refers to the radius direction along the fluid collecting plate 5 and the fluid distribution plate 7.

[0084] According to a more preferred embodiment of the present invention, the first region 14 is not perforated, while the second region 13 is perforated evenly. In this embodiment, since the first region 14 of the fluid distribution plate 7 is not perforated, the fluid flowing through the first region 14 to the second region 13 mainly moves in all directions, which is beneficial for achieving uniform fluid distribution. (See reference...) Figure 4 .

[0085] In this invention, when the first region 14 and the second region 13 of the fluid distribution plate 7 are respectively evenly distributed with openings, the following three preferred embodiments are mainly included:

[0086] (1) The aperture and spacing of the openings in the first region 14 and the second region 13 are consistent. A strip screen 15 with tiny gaps is set above the first region 14 directly below the fluid flow channel 12 to achieve uniform fluid distribution. (Refer to...) Figures 6-7 ;

[0087] (2) The apertures of the first region 14 and the second region 13 are consistent. The spacing between two adjacent apertures in the first region 14 is greater than the spacing between two adjacent apertures in the second region 13. The flow direction of the fluid is controlled by the aperture ratio of the first region 14, causing the fluid to move in all directions. The uniform distribution of the fluid is achieved by the aperture ratio of the second region 13. (Refer to...) Figure 8 ;

[0088] (3) The aperture of the opening in the first region 14 and the spacing between two adjacent openings are both smaller than those in the second region 13. The throughput of the densely packed small holes in the first region 14 is much smaller than that in the second region 13. This is to adjust the fluid flow pattern, so that the fluid flowing through the densely packed small holes tends to flow outwards, achieving a uniform fluid distribution effect. (Refer to...) Figure 5 .

[0089] By adopting the above three preferred embodiments, it is further beneficial to obtain a uniform fluid distribution effect in the cross section of the solid particle bed and effectively avoid adverse flow when the fluid flows through the solid particle bed.

[0090] It should be noted that the aperture of the opening provided in the second region 13 meets the above conditions (the aperture of the opening in the second region 13 is 1-10mm, preferably 1-4mm).

[0091] Option 1

[0092] According to a preferred embodiment of the present invention, openings are evenly distributed on the first region 14 and the second region 13, and the diameter of the openings on the first region 14 is equal to the diameter of the openings on the second region 13.

[0093] According to a preferred embodiment of the present invention, the distance between two adjacent openings in the first region 14 is equal to the distance between two adjacent openings in the second region 13.

[0094] According to a preferred embodiment of the present invention, strip screens 15 are evenly distributed above the first region 14, and the opening ratio of the openings on the strip screens 15 is less than the opening ratio of the openings on the first region 14.

[0095] The strip screen described in this invention refers to a structure composed of multiple long, strip-shaped ribs arranged at equal intervals. The opening ratio of the holes on the strip screen 15 is controlled by the width and spacing of the ribs, and can be appropriately selected according to specific circumstances to ensure that the opening ratio of the holes on the strip screen 15 is less than the opening ratio of the holes in the first region 14.

[0096] According to a preferred embodiment of the present invention, the width of the ribs of the strip screen 15 is 0.5-4 mm.

[0097] According to a preferred embodiment of the present invention, the spacing between two adjacent ribs on the strip screen 15 is 0.05-2mm, preferably 0.1-1.3mm.

[0098] In this invention, the width of the ribs or the spacing between the ribs is first controlled to be within the above range, and the other can be appropriately selected according to the specific situation to ensure that the opening rate of the opening on the strip screen 15 is less than the opening rate of the opening on the first region 14.

[0099] In this invention, the strip screen 15 and the fluid distribution plate 7 may or may not be attached (there is a certain distance between them), and there are no special requirements for this. When they are not attached, the distance between the strip screen 15 and the fluid distribution plate 7 is 0.5-10mm.

[0100] Figure 7 A side view of the fluid distribution plate 7 after the strip screen has been installed, from... Figure 7 It can be seen that the strip screen 15 is in close contact with the fluid distribution plate 7, and the upper surface of the strip screen 15 is flat.

[0101] The second option

[0102] According to a preferred embodiment of the present invention, openings are evenly distributed on the first region 14 and the second region 13, and the diameter of the openings on the first region 14 is equal to the diameter of the openings on the second region 13.

[0103] According to a preferred embodiment of the present invention, the spacing between two adjacent openings in the first region 14 is greater than the spacing between two adjacent openings in the second region 13, preferably 1.2-8 times, more preferably 1.5-5.5 times.

[0104] According to a more preferred embodiment of the present invention, the second region 13 is divided into N units, the first unit is disposed close to the first region 14, and the second to N units are disposed gradually away from the first region 14, wherein N≥2.

[0105] It should be noted that the first unit includes the areas near both sides of the first region 14 and the areas between the first regions 14, and the units from the second unit to the Nth unit are gradually moved away from the first region 14; that is, the first unit in the second region 13 is the unit through which the fluid passes first, and the Nth unit is the unit through which the fluid passes last.

[0106] In this invention, the number of N is appropriately selected based on the volume of the container containing the solid particles, the flow rate of the fluid inside the container, and the number of collection-mixing-distribution devices. Preferably, N = 2-6.

[0107] According to a preferred embodiment of the present invention, in the second region 13, from the first unit to the Nth unit, the spacing between two adjacent openings gradually decreases, preferably by 10-25%. This preferred embodiment is beneficial for achieving uniform fluid distribution through stepped matching of the fluid distribution plate.

[0108] It should be noted that the reduction ratio mentioned above = (the difference between the spacing between two adjacent openings in the Nth unit and the spacing between two adjacent openings in the (N-1)th unit) / the spacing between two adjacent openings in the (N-1)th unit.

[0109] For example, the aperture spacing of the second unit is 7.5mm, and the aperture spacing of the first unit is 10mm, a reduction of 25%.

[0110] According to a more preferred embodiment of the present invention, the width of each of the N units in the second region 13 is 1-5 times the width of the first region 14.

[0111] It should be noted that when the fluid distribution plate 7 is rectangular, the width of each region refers to the width direction along the fluid distribution plate 7; when the fluid distribution plate 7 is fan-shaped, the width of each region refers to the radius direction along the fluid distribution plate 7.

[0112] According to a preferred embodiment of the present invention, all N units of the second region 13 are parallel to the first region 14.

[0113] When the fluid distribution plate 7 is rectangular, the above-described preferred embodiment can be referred to in detail. Figure 9 The opening ratio of N units in the second region 13 changes with the distance from the first region 14. Along the length direction, the N units in the second region 13 are parallel to the first region 14. By improving and uniformly distributing the downward flow of fluid through different opening ratios, the fluid uniform distribution plate 7 achieves uniform upper fluid distribution.

[0114] When the fluid distribution plate 7 is fan-shaped, the above-described preferred embodiment can be referred to in detail. Figure 11 The opening ratio of N units in the second region 13 changes with the distance from the first region 14. Along the tangent direction of the arc, the N units in the second region 13 are parallel to the first region 14. By improving and uniformly distributing the downward flow of fluid through different opening ratios, the fluid uniform distribution plate 7 cross section is achieved.

[0115] The third option

[0116] According to a preferred embodiment of the present invention, openings are evenly distributed on the first region 14 and the second region 13, and the distance between two adjacent openings on the first region 14 is smaller than the distance between two adjacent openings on the second region 13, preferably 0.2-0.8 times.

[0117] According to a preferred embodiment of the present invention, the aperture of the opening in the second region 13 is larger than the aperture of the opening in the first region 14, preferably by 2.5 to 10 times.

[0118] The shapes of the openings in the first region 14 and the second region 13 of the present invention can be regular or irregular, such as circles, squares, trapezoids, rectangles, or polygons such as pentagons and hexagons. According to a preferred embodiment of the present invention, the shapes of the openings in the first region 14 and the second region 13 are both circular.

[0119] The present invention does not impose any particular limitations on the configuration (e.g., size, position, etc.) of the fluid injection and extraction pipelines 2. Appropriate selection can be made according to the device size and feeding conditions to ensure the fluid injection or extraction fluid collection-mixing-uniform distribution device 1.

[0120] According to a preferred embodiment of the present invention, one end of the fluid collection chamber 3 is connected to the fluid injection and extraction pipeline 2, and the other end passes through the fluid collection plate 5.

[0121] According to a preferred embodiment of the present invention, the fluid collection chamber 3 is arranged perpendicularly or parallel to the straight side of the fluid collection-mixing-uniform distribution device 1 and is in contact with the side walls around the fluid collection-mixing-uniform distribution device 1.

[0122] According to a preferred embodiment of the present invention, the sidewalls of the fluid collection chamber 3 are evenly distributed with openings.

[0123] The shape of the opening in the side wall of the fluid collection chamber 3 described in this invention can be regular or irregular, such as a circle, square, trapezoid, rectangle, or a polygon such as a pentagon or hexagon. In this embodiment of the invention, the shape of the opening in the side wall of the fluid collection chamber 3 is exemplaryly set to be circular.

[0124] According to a preferred embodiment of the present invention, the fluid collection-mixing-distribution device 1 further includes a fluid mixing chamber 4, which is disposed on both sides of the fluid collection chamber 3 for mixing fluids from the fluid collection chamber 3.

[0125] The present invention does not impose any particular limitation on the shape of the fluid mixing chamber 4. It can be rectangular or annular, as long as the upper surface of the fluid mixing chamber 4 is parallel to the fluid collecting plate 5.

[0126] According to a preferred embodiment of the present invention, the fluid mixing chamber 4 has openings evenly distributed on its side walls.

[0127] The shape of the opening on the side wall of the fluid mixing chamber 4 described in this invention can be regular or irregular, such as a circle, square, trapezoid, rectangle, or a polygon such as a pentagon or hexagon. In this embodiment of the invention, the shape of the opening on the side wall of the fluid mixing chamber 4 is exemplaryly set to be circular.

[0128] In this invention, the terms "first" and "second" do not limit the substances and operations, but are only used to distinguish the substances introduced in different steps and the operations performed in different stages.

[0129] The second aspect of the present invention provides an application of the fluid collection-mixing-uniform distribution device described in the first aspect in adsorption separation in a simulated moving bed device.

[0130] A third aspect of the present invention provides a simulated moving bed device, the device comprising two or more vertically arranged solid particle beds 10 and a fluid collection-mixing-distribution device 1 disposed between two of the solid particle beds 10;

[0131] The fluid collection-mixing-uniform distribution device 1 is the same as the fluid collection-mixing-uniform distribution device 1 described in the first aspect.

[0132] The equipment described in this invention is suitable for adsorption separation in simulated moving bed devices containing solid particle beds, and is particularly suitable for adsorption separation in simulated moving bed devices containing multi-stage solid particle beds, to achieve continuous contact between fluid and solid particles. When the fluid flows through the solid particle beds of the simulated moving bed device, the fluid in each solid particle bed is redistributed to the next solid particle bed. Through multi-stage redistribution, undesirable flow phenomena generated when the fluid flows through the bed are effectively avoided, including channeling, flow deviation, and the formation of flow dead zones; ensuring uniform fluid flow within the simulated moving bed device, reducing the degree of velocity unevenness of the material during the flow process, and improving the overall operating efficiency of the device.

[0133] The present invention does not have a particular limitation on the specific number of solid particle beds 10, and can be appropriately selected according to the material feed rate and the simulated moving bed device equipped with solid particle beds.

[0134] According to a preferred embodiment of the present invention, in the simulated moving bed device, the fluid collection-mixing-distribution device 1 is further disposed above the top solid particle bed 10 and below the bottom solid particle bed 10. This preferred embodiment further facilitates achieving a uniform fluid distribution effect.

[0135] According to a preferred embodiment of the present invention, the device further includes an anti-impact screen plate 8, which is placed above the solid particle bed 10 to prevent solid particles in the solid particle bed 10 from flowing into the fluid collection-mixing-distribution device 1.

[0136] To better prevent solid particles in the solid particle bed 10 from flowing into the fluid collection-mixing-distribution device 1, the impact-resistant screen plate 8 of the present invention extends horizontally to cover the simulated moving bed device. According to a preferred embodiment of the present invention, the cross-sectional area of ​​the impact-resistant screen plate 8 is equal to the cross-sectional area of ​​the simulated moving bed device.

[0137] To ensure smooth fluid flow, according to a preferred embodiment of the present invention, the anti-impact screen plate 8 is provided with evenly distributed openings.

[0138] The present invention does not have any particular limitation on the size and arrangement of the openings on the anti-impact screen plate 8, as long as it can achieve the purpose of preventing solid particles in the solid particle bed 10 from flowing into the fluid collection-mixing-uniform distribution device 1 and allowing the fluid to pass through.

[0139] The impact-resistant screen plate 8 of the present invention is spaced apart from the fluid distribution plate 7 of the fluid collection-mixing-uniform distribution device 1.

[0140] According to a preferred embodiment of the present invention, the device further includes a solid particle support screen 11, which is placed at the bottom of the solid particle bed 10 to support the solid particle bed 10 and allow fluid to pass through.

[0141] To better support the solid particle bed 10, the solid particle support screen 11 of the present invention extends horizontally to cover the simulated moving bed device. According to a preferred embodiment of the present invention, the cross-sectional area of ​​the solid particle support screen 11 is equal to the cross-sectional area of ​​the simulated moving bed device.

[0142] The present invention does not impose any particular limitations on the mesh size and arrangement of the solid particle support screen 11, as long as the above-mentioned purpose can be achieved.

[0143] According to a preferred embodiment of the present invention, the device further includes a circulating feed line 9 disposed on top of the simulated moving bed device for introducing fluid into the device.

[0144] According to a preferred embodiment of the present invention, the device further includes a circulating discharge pipeline 6, which is disposed at the bottom of the simulated moving bed device for drawing fluid out of the device.

[0145] According to a specific embodiment of the present invention, such as Figures 1-2As shown, the fluid enters from the circulating feed line 9 at the top of the simulated moving bed device, and then is introduced into the top fluid collection-mixing-uniform distribution device 1 through the fluid injection and extraction lines 2. The inflowing fluid is mixed in the fluid collection chamber 3 and changes its flow direction. After further mixing in the fluid mixing chamber 4, it is collected in the fluid collection plate 5. After primary distribution through the fluid flow channel 12 of the fluid collection plate 5, it continues to flow downward. The downward flowing fluid is secondary distributed on the fluid uniform distribution plate 7 (first through the first region 14, then through the second region 13) and continues to flow downward. When passing through the anti-impact screen plate 8, the disturbance to the bed is further reduced. The fluid that continues to flow to the solid particle bed 10 passes through the solid particle support screen 11, flows through multiple intermediate fluid collection-mixing-uniform distribution devices 1 and the solid particle bed 10, and is then introduced into the bottom fluid collection-mixing-uniform distribution device 1 to make the fluid flow more uniform before being sent out from the bottom circulating discharge line 6.

[0146] The present invention will be described in detail below through embodiments.

[0147] The non-uniform velocity distribution of the fluid collection-mixing-distribution device of the present invention is achieved by setting multiple velocity measurement points with equal area below the fluid collection-mixing and distribution device, so that a certain flow rate of fluid passes through the fluid collection-mixing and distribution device, and the flow rate / velocity in each equal area area is measured at the outlet on the lower surface of the device.

[0148] In this invention, the average deviation of the velocity measured at the velocity measurement point in the plane from the average value of the exit velocity is defined as the velocity distribution non-uniformity.

[0149] Example 1

[0150] use Figures 1-2 The device shown.

[0151] A simulated moving bed device is characterized in that the device includes 12 vertically arranged solid particle beds 10, a fluid collection-mixing-distribution device 1, an impact-resistant screen plate 8, a solid particle support screen 11, a circulating discharge pipeline 6, and a circulating feed pipeline 9; wherein the fluid collection-mixing-distribution device 1 is disposed between two adjacent solid particle beds 10, above the top solid particle bed 10, and below the bottom solid particle bed 10; 16 of the fluid collection-mixing-distribution devices 1 are disposed at the same height.

[0152] The fluid collection-mixing-distribution device 1 includes a fluid injection and extraction pipeline 2, a fluid collection chamber 3, a fluid mixing chamber 4, a fluid collection plate 5, and a fluid distribution plate 7.

[0153] One end of the fluid collection chamber 3 is connected to the fluid injection and extraction pipeline 2, and the other end passes through the fluid collection plate 5; the side wall of the fluid collection chamber 3 is evenly distributed with circular openings, and the fluid mixing chamber 4 is provided on both sides of the fluid collection chamber 3. The upper surface of the fluid mixing chamber 4 is parallel to the fluid collection plate 5, and the side wall of the fluid mixing chamber 4 is evenly distributed with circular openings.

[0154] Both the fluid collecting plate 5 and the fluid distribution plate 7 are fan-shaped. The fluid collecting plate 5 has elongated fluid flow channels 12, each with an equal cross-sectional area. The ratio of the total cross-sectional area of ​​the fluid flow channels 12 to the cross-sectional area of ​​the fluid collecting plate 5 is 1:75. Along the radial direction of the fluid collecting plate 5, there are two rows of fluid flow channels 12, and each row of fluid flow channels 12 is in contact with the fluid collecting chamber 3. The direction of each row of fluid flow channels 12 is parallel to the tangent direction of the arc of the fluid collecting plate 5. The fluid flow channels 12 are evenly distributed along the tangent direction of the arc of the fluid collecting plate 5.

[0155] The fluid distribution plate 7 is horizontally arranged and divided into a first region 14 and a second region 13. The cross-sectional width of the first region 14 is three times the cross-sectional width of the fluid flow channel 12. Circular openings are evenly distributed on the first region 14 and the second region 13. The opening diameter on the first region 14 is equal to the opening diameter on the second region 13, both being 4 mm.

[0156] The second region 13 is divided into two units. The first unit is set close to the first region 14, and the second to N units are set gradually away from the first region 14. The width of the first unit in the second region 13 is twice the width of the first region 14, and the width of the second unit is four times the width of the first region 14.

[0157] The spacing between two adjacent openings in the first region 14 is 1.6 times the spacing between two adjacent openings in the first unit of the second region 13;

[0158] In the second region 13, from the first unit to the second unit, the spacing between two adjacent openings gradually decreases by 15%.

[0159] A velocity vector observation point was set below the fluid distribution plate to evaluate the velocity distribution non-uniformity of the fluid collection-mixing-distribution device. The evaluation results are shown in Table 1.

[0160] Example 2

[0161] use Figures 1-2 The device shown.

[0162] A simulated moving bed device is characterized in that the device includes 12 vertically arranged solid particle beds 10, a fluid collection-mixing-distribution device 1, an impact-resistant screen plate 8, a solid particle support screen 11, a circulating discharge pipeline 6, and a circulating feed pipeline 9; wherein the fluid collection-mixing-distribution device 1 is disposed between the solid particle beds 10, above the top solid particle bed 10, and below the bottom solid particle bed 10; 24 of the fluid collection-mixing-distribution devices 1 are disposed at the same height.

[0163] The fluid collection-mixing-distribution device 1 includes a fluid injection and extraction pipeline 2, a fluid collection chamber 3, a fluid mixing chamber 4, a fluid collection plate 5, and a fluid distribution plate 7.

[0164] One end of the fluid collection chamber 3 is connected to the fluid injection and extraction pipeline 2, and the other end passes through the fluid collection plate 5; the side wall of the fluid collection chamber 3 is evenly distributed with circular openings, and the fluid mixing chamber 4 is provided on both sides of the fluid collection chamber 3. The upper surface of the fluid mixing chamber 4 is parallel to the fluid collection plate 5, and the side wall of the fluid mixing chamber 4 is evenly distributed with circular openings.

[0165] Both the fluid collecting plate 5 and the fluid distribution plate 7 are rectangular in shape. The fluid collecting plate 5 has elongated fluid flow channels 12, each with an equal cross-sectional area. The ratio of the total cross-sectional area of ​​the fluid flow channels 12 to the cross-sectional area of ​​the fluid collecting plate 5 is 1:150. Along the width direction of the fluid collecting plate 5, there are two rows of fluid flow channels 12, and each row of fluid flow channels 12 is in contact with the fluid collecting chamber 3. The fluid flow channels 12 are parallel to the long side of the fluid collecting plate 5. Along the length direction of the fluid collecting plate 5, the fluid flow channels 12 are evenly distributed.

[0166] The fluid distribution plate 7 is horizontally arranged and divided into a first region 14 and a second region 13. The cross-sectional width of the first region 14 is 1.7 times the cross-sectional width of the fluid flow channel 12. The first region 14 has no holes, while the second region 13 has evenly distributed circular holes with a diameter of 3 mm.

[0167] A velocity vector observation point was set below the fluid distribution plate to evaluate the velocity distribution non-uniformity of the fluid collection-mixing-distribution device. The evaluation results are shown in Table 1.

[0168] Comparative Example 1

[0169] A fluid collection, mixing, and distribution device disclosed in CN201592090U is characterized by having several labyrinth components inside to enhance fluid mixing. After flowing through the upstream bed, the fluid enters the fluid collection, mixing, and distribution device, and then a labyrinth component surrounded by multiple baffles is installed inside the downward channel, allowing the fluid to mix continuously within the labyrinth component. The fluid is then evenly distributed into the downstream solid particle bed by a bottom anti-impact plate.

[0170] A velocity vector observation point was set at the outlet on the lower surface of the device to evaluate the non-uniformity of velocity distribution in the fluid collection-mixing-uniform distribution device. The evaluation results are shown in Table 1.

[0171] Table 1

[0172] Example number Speed profile unevenness Comparative example 1 0.30 Example 1 0.14 Example 2 0.17

[0173] As can be seen from the results in Table 1, the embodiment using the fluid collection-mixing-uniform distribution device of the present invention exhibits lower velocity distribution non-uniformity. This demonstrates that the fluid collected by the fluid collection-mixing-uniform distribution device of the present invention can achieve a more uniform velocity and component distribution.

[0174] pass Figure 12 It can be seen that the speed distribution of the device in Comparative Example 1 has obvious deviations in the speed distribution near the fluid flow channel area, and there are places where the speed is too high locally. The speed distribution is more uniform near the two sides of the fan-shaped area.

[0175] pass Figure 13 It can be seen that the speed distribution effect of the rectangular device in Example 1 is significantly better than the speed distribution given in Comparative Example 1.

[0176] pass Figure 14 It can be seen that the velocity distribution in Example 2 is more uniform overall than that in Comparative Example 1, and there is no excessive local velocity.

[0177] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A fluid collection-mixing-equalization apparatus, characterized by, The fluid collecting-mixing-distributing device (1) comprises a fluid injection and extraction pipeline (2), a fluid collecting chamber (3), a fluid collecting plate (5) and a fluid distributing plate (7) arranged in sequence along the fluid flow trend; The fluid collecting chamber (3) is used for changing the flow direction of the fluid injected through the fluid injection and extraction pipeline (2); The fluid collecting plate (5) is provided with fluid flow channels (12) for distributing the fluid from the fluid collecting chamber (3) once; The fluid distributing plate (7) is used for distributing the fluid from the fluid collecting plate (5) twice, comprising a first area (14) directly below the fluid flow channels (12) and a second area (13) outside the first area (14), and the fluid flow capacity of the second area (13) is greater than that of the first area (14).

2. The device according to claim 1, wherein The fluid collecting plate (5) is provided with a plurality of fluid flow channels (12); Preferably, the ratio of the total cross-sectional area of the fluid flow channels (12) to the cross-sectional area of the fluid collecting plate (5) is 1:(20-200), preferably 1:(30-150); Preferably, the cross-sectional area of each fluid flow channel (12) is equal.

3. The device according to claim 1 or 2, wherein The fluid collecting plate (5) is rectangular in shape, and along the width direction of the fluid collecting plate (5), the fluid flow channels (12) are arranged in at least two rows; Preferably, the at least two rows of fluid flow channels (12) are arranged on both sides of the fluid collecting chamber (3) as the center; Preferably, the arrangement direction of each row of fluid flow channels (12) is parallel to the length direction of the fluid collecting plate (5); Preferably, along the length direction of the fluid collecting plate (5), the fluid flow channels (12) are uniformly arranged.

4. The device according to claim 1 or 2, wherein The fluid collecting plate (5) is fan-shaped in shape, and along the radial direction of the fluid collecting plate (5), the fluid flow channels (12) are arranged in at least two rows; Preferably, the at least two rows of fluid flow channels (12) are arranged on both sides of the fluid collecting chamber (3) as the center; Preferably, the arrangement direction of each row of fluid flow channels (12) is parallel to the tangential direction of the circular arc of the fluid collecting plate (5); Preferably, along the tangential direction of the circular arc of the fluid collecting plate (5), the fluid flow channels (12) are uniformly arranged.

5. The device according to any one of claims 1-4, wherein The cross-sectional width of the first area (14) is 1-4 times, preferably 1.2-3 times, the cross-sectional width of the fluid flow channel (12); Preferably, the second area (13) is uniformly provided with openings; Preferably, the diameter of the openings of the second area (13) is 1-10 mm, preferably 1-4 mm.

6. The device according to any one of claims 1-5, wherein The first area (14) is not provided with openings, and the second area (13) is uniformly provided with openings.

7. The apparatus according to any one of claims 1-5, wherein, the first region (14) and the second region (13) are respectively provided with holes, and the hole diameter of the first region (14) is equal to that of the second region (13); preferably, the distance between two adjacent holes in the first region (14) is equal to that in the second region (13); preferably, a strip-shaped screen (15) is provided above the first region (14), and the opening rate of the holes in the strip-shaped screen (15) is less than that in the first region (14); preferably, the width of the strip of the strip-shaped screen (15) is 0.5-4 mm; and / or, the distance between two adjacent strips of the strip-shaped screen (15) is 0.05-2 mm.

8. The apparatus according to any one of claims 1-5, wherein, the first region (14) and the second region (13) are respectively provided with holes, and the hole diameter of the first region (14) is equal to that of the second region (13); preferably, the distance between two adjacent holes in the first region (14) is greater than that in the second region (13), preferably 1.2-8 times, more preferably 1.5-5.5 times.

9. The apparatus according to claim 8, wherein, the second region (13) is divided into N units, the first unit is arranged close to the first region (14), and the second to Nth units are arranged gradually away from the first region (14), wherein N≥2; preferably, the distance between two adjacent holes in the second region (13) gradually decreases from the first unit to the Nth unit, preferably by 10-25%.

10. The apparatus according to any one of claims 1-5, wherein, the first region (14) and the second region (13) are respectively provided with holes, and the distance between two adjacent holes in the first region (14) is less than that in the second region (13), preferably 0.2-0.8 times; preferably, the hole diameter of the second region (13) is greater than that of the first region (14), preferably 2.5-10 times.

11. Use of the fluid collecting-mixing-distributing apparatus according to any one of claims 1-10 in simulated moving bed adsorption separation.

12. A simulated moving bed apparatus characterized in that, The apparatus comprises two or more vertically arranged solid particle beds (10) and a fluid collecting-mixing-distributing apparatus (1) arranged between the two solid particle beds (10); wherein the fluid collecting-mixing-distributing apparatus (1) is the fluid collecting-mixing-distributing apparatus (1) according to any one of claims 1-10; preferably, the fluid collecting-mixing-distributing apparatus (1) is further arranged above the top solid particle bed (10) and below the bottom solid particle bed (10).

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