CN216614526U - Fluid distribution device and adsorption tower - Google Patents

Abstract

The utility model provides a fluid distribution device and an adsorption tower, wherein the fluid distribution device comprises at least two fluid distributors, each fluid distributor comprises an inner partition plate, an outer partition plate and two radial side plates, the inner partition plate and the outer partition plate are respectively connected with the two radial side plates to form a cavity, a plurality of fluid distribution units are arranged in the cavity, each fluid distribution unit comprises an upper plate, a lower plate, an upper rotational flow assembly, a middle baffle plate and a lower flow stabilizing assembly, the upper rotational flow assembly, the middle baffle plate and the lower flow stabilizing assembly are sequentially arranged between the upper plate and the lower plate from top to bottom, rotational flow guide blades in the upper rotational flow assembly can convert the flow pattern of fluid into stable rotational flow by utilizing the self kinetic energy and static pressure of the fluid entering the fluid distributors, so that the fluid is uniformly mixed on the upper side of a fluid channel, and the rotational flow guide blades play a role in guiding the fluid, compared with the mode of baffling by adopting multiple baffle plates or adopting fluid small hole injection, the fluid flow pressure drop is small.

Description

Fluid distribution device and adsorption tower

Technical Field

The utility model relates to the technical field of petrochemical separation, in particular to a fluid distribution device and an adsorption tower.

Background

The solid particle simulated moving bed adsorption separation technology has the advantages of low investment, low energy consumption, easy large-scale production, continuous operation, stable operation, high product purity, high utilization efficiency of the adsorbent and the like, and the application fields including petrochemical, biochemical, pharmaceutical and the like are continuously developed in recent years.

The adsorption tower is the core equipment of the solid particle simulated moving bed adsorption separation technology. Depending on the separation requirements, the adsorption column is often divided axially into a plurality of solid particle beds, and a fluid distribution device is disposed between two adjacent solid particle beds. The fluid distribution device is used for collecting the fluid of the previous solid particle bed layer and then sending the fluid out of the adsorption tower through the inlet and outlet pipeline, or uniformly distributing the fluid of the previous solid particle bed layer and the fluid entering the adsorption tower through the inlet and outlet pipeline after fully mixing to the next solid particle bed layer. The performance of the fluid distribution device has important influence on the performance of the adsorbent of the adsorption tower, and is key equipment of the solid particle simulated moving bed adsorption separation technology.

The existing fluid distribution device adopts multiple baffle plates for baffling or adopts a fluid small hole injection mode to realize uniform mixing and adopts a mode of increasing outlet resistance drop to realize uniform distribution in the aspects of fluid collection, mixing and redistribution.

SUMMERY OF THE UTILITY MODEL

Existing fluid distribution devices require more deflection times or higher injection velocities that tend to result in too large a pressure drop if good mixing is to be achieved. In view of the above problems, it is necessary to provide a fluid dispensing device to solve or partially solve the above problems, and the technical solution proposed by the present invention is as follows:

in a first aspect, the present invention provides a fluid distribution device, including at least two fluid distributors, where each fluid distributor includes an inner partition, an outer partition, and two radial side plates, the outer partition is arc-shaped, the inner partition and the outer partition are respectively connected with the two radial side plates to form a cavity, a plurality of fluid distribution units are disposed in the cavity, each fluid distribution unit includes an upper plate, a lower plate, and an upper cyclone assembly, a middle baffle, and a lower flow stabilizing assembly sequentially disposed between the upper plate and the lower plate from top to bottom, where:

the upper layer plate and the lower layer plate are parallel, and a plurality of flow guide holes are respectively formed in the upper layer plate and the lower layer plate;

a fluid channel is arranged in the middle of the middle baffle;

the upper rotational flow component comprises an upper baffle plate and at least two rotational flow guide vanes, the at least two rotational flow guide vanes are fixed on the middle baffle plate and are uniformly arranged along 360 degrees by taking the center of the fluid channel as a circle center, and the upper baffle plate is positioned above the fluid channel and is fixed on the at least two rotational flow guide vanes;

the lower flow stabilizing assembly comprises at least two guide plates, and the at least two guide plates are fixed on the lower plate.

Furthermore, a middle partition plate and a radial partition plate are arranged in the cavity, two ends of the middle partition plate are respectively connected with the two radial side plates, and two ends of the radial partition plate are respectively connected with the external partition plate and the middle partition plate so as to divide the cavity into three fluid distribution units with the same radial sectional area.

Furthermore, the rotational flow guide vane is arc-shaped, and the ratio of the diameter of the arc at the inner side of the rotational flow guide vane to the equivalent diameter of the fluid channel is 0.1 to 10.

Further, the at least two deflectors are evenly arranged along the lower plate.

Further, the upper baffle and the middle baffle are parallel to each other.

Further, the upper baffle equivalent diameter is greater than the fluid passageway equivalent diameter.

Further, the lower flow stabilizing assembly further comprises a lower baffle plate which is positioned below the fluid channel and partially shields the at least two flow deflectors.

Further, the lower baffle and the middle baffle are parallel to each other.

Further, the lower baffle equivalent diameter is greater than the fluid passageway equivalent diameter.

Further, the ratio of the spacing between the upper and lower baffles to the equivalent diameter of the fluid passageway is between 0.4 and 1.6.

Further, each of the flow distributors has the same radial cross-sectional area.

Further, the at least two fluid distributors are evenly arranged along 360 degrees.

Further, the fluid distributor also comprises an inlet and outlet pipeline, one end of the inlet and outlet pipeline is connected with the upper plate and leads to the inside of the fluid distributor, and the other end of the inlet and outlet pipeline leads to the outside of the fluid distributor so as to be used for sending the fluid out of the fluid distributor or conveying the fluid outside the fluid distributor to the inside of the fluid distributor.

On the other hand, the utility model provides an adsorption tower which comprises a cylinder body, a plurality of solid particle beds and the fluid distribution device, wherein the cylinder body is axially provided with a central pillar, the solid particle beds are arranged inside the cylinder body at intervals, and the fluid distribution device is arranged between every two layers of solid particle beds and is positioned between the central pillar and the inner wall of the cylinder body.

Based on the technical scheme, compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a fluid distribution device, wherein a rotational flow guide vane can convert the flow pattern of fluid into stable rotational flow by utilizing the self kinetic energy and static pressure energy of the fluid entering the fluid distribution device, so that the fluid is uniformly mixed at the upper side of a fluid channel, the rotational flow can promote the uniform distribution of the fluid after passing through the fluid channel, and the rotational flow guide vane plays a role in guiding the fluid, so that the pressure drop of the fluid flow is smaller compared with the mode of baffling by adopting multiple baffle plates or spraying by adopting fluid small holes.

Drawings

FIG. 1 is a schematic diagram of a fluid dispensing device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a fluid dispenser according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a fluid dispensing unit according to a first embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of a fluid dispenser according to a first embodiment of the present invention;

FIG. 5 is a schematic view of the direction of fluid flow within each fluid dispensing unit of the fluid dispenser according to one embodiment of the present invention;

FIG. 6 is a schematic view of the structure of an adsorption column in the second embodiment of the present invention.

The device comprises a flow distributor 300, a flow distributor 1, an upper plate 1, a lower plate 2, an upper cyclone assembly 3, a cyclone guide vane 31, an upper baffle 32, a middle baffle 4, a fluid channel 41, a lower flow stabilizing assembly 5, a guide plate 51, a lower baffle 52, an inlet and outlet pipeline 6, a solid particle bed 7, a radial side plate 21, a middle partition 22, a central support 200, an outer area 24, an inner partition 25, an inner area 26, a radial partition 27, an outer partition 28 and a cylinder 100.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In the present invention, the equivalent diameter is equal to 4 times the radial cross-sectional area divided by the cross-sectional perimeter. Equal radial cross-sectional areas means that the radial cross-sectional areas are within 5% of each other.

Example one

The embodiment provides a fluid distribution device, place between two layers of solid particle beds, as shown in fig. 1-3, including at least two fluid distributors, fluid distributor includes inside baffle 25, outside baffle 28 and two radial curb plates 21, outside baffle 28 is circular-arc, and inside baffle 25 and outside baffle 28 are connected with two radial curb plates 21 respectively and form a cavity, be separated for a plurality of fluid distribution units in the cavity, each fluid distribution unit includes upper plate 1, lower plate 2, and from top to bottom set gradually in upper portion whirl subassembly 3, middle baffle 4, lower part steady flow subassembly 5 between upper plate 1 and lower plate 2, wherein:

the upper plate 1 is parallel to the lower plate 2, and a plurality of flow guide holes are respectively formed in the upper plate 1 and the lower plate 2.

The middle part of the middle baffle 4 is provided with a fluid channel 41.

The upper cyclone assembly 3 comprises an upper baffle 32 and at least two cyclone guide vanes 31, the at least two cyclone guide vanes 31 are fixed on the middle baffle 4 and are uniformly arranged along 360 degrees by taking the center of the fluid passage 41 as the circle center, and the upper baffle 32 is positioned above the fluid passage 41 and is fixed on the at least two cyclone guide vanes 31. The swirl guide vane 31 can convert the flow pattern of the fluid into a stable swirl by using the kinetic energy and static pressure energy of the fluid entering the fluid distributor, so that the fluid from the upper solid particle bed and the fluid from the inlet and outlet pipeline are uniformly mixed on the upper side of the fluid channel 41, and the swirl can promote the uniform distribution of the fluid after passing through the fluid channel 41. The upper baffle 32 can effectively distribute the fluid entering from the upper plate 1, prevent the fluid entering from the upper plate 1 from directly impacting the stable rotational flow induced by the rotational flow guide vane 31, and play a role in stabilizing the rotational flow.

The lower flow stabilizing assembly 5 comprises at least two deflectors 51, and the at least two deflectors 51 are fixed to the lower plate 2. In some specific embodiments, as shown in fig. 3, the at least two baffles 51 are uniformly arranged along the lower deck 2.

According to the fluid distribution device provided by the embodiment of the utility model, the rotational flow guide vanes 31 can convert the flow pattern of the fluid into stable rotational flow by utilizing the self kinetic energy and static pressure energy of the fluid entering the fluid distribution device, so that the fluid is uniformly mixed at the upper side of the fluid channel 41, the rotational flow can promote the uniform distribution of the fluid after passing through the fluid channel 41, the rotational flow guide vanes 31 play a role in guiding the fluid, and compared with a mode of baffling by adopting multiple baffle plates or spraying by adopting fluid small holes, the fluid flow pressure drop is smaller.

In some embodiments, the chamber is divided into three fluid distribution units, specifically, as shown in fig. 2, a middle partition 22 and a radial partition 27 are provided in the chamber, two ends of the middle partition 22 are respectively connected to the two radial side plates 21, and two ends of the radial partition 27 are respectively connected to the outer partition 28 and the middle partition 22, so as to divide the chamber into three fluid distribution units with equal radial cross-sectional areas, such as two outer fluid distribution units 24 and one inner fluid distribution unit 26 shown in fig. 2. The inside of the fluid distributor is divided into three fluid distribution units with equal radial cross-sectional areas, the internal structure of each fluid distribution unit is the same, the minimum circulation unit of the fluid is still the fluid distribution unit in the monolithic fluid distributor, the same internal structure of the fluid distribution unit is still used for mixing and redistributing, and the amplification effect of the adsorption tower is favorably eliminated. Of course, the chamber may be divided into other numbers of fluid distribution units, and the number of fluid distribution units is not limited to three.

In some embodiments, as shown in fig. 4, the swirl guide vane 31 has a circular arc shape, and the ratio of the diameter of the circular arc 313 inside the swirl guide vane 31 to the equivalent diameter of the fluid passage 41 is between 0.1 and 10. Due to the specific radian of the rotational flow guide vane 31, the fluid still keeps rotational flow after passing through the rotational flow guide vane 31, so that the fluid is fully and uniformly mixed.

In some embodiments, as shown in fig. 3, the upper baffle 32 and the middle baffle 4 are parallel to each other. Parallel means that the angle between the upper baffle 32 and the middle baffle 4 along the extension of the length direction (specifically, the angle smaller than 90 degrees is formed) is not more than 5 degrees. The upper baffle 32 and the middle baffle 4 are parallel to each other, so that the vertical impact of the fluid on the swirl flow guiding blade 31 can be blocked, and the stability of the swirl flow is ensured.

In some embodiments, as shown in fig. 3, the upper baffle 32 equivalent diameter is greater than the fluid passageway 41 equivalent diameter. Thus, the upper baffle can better block the direct impact of the fluid entering from the inlet/outlet pipe on the stable swirling flow induced by the swirling flow guide vanes 31 in the fluid passage 41.

In some embodiments, as shown in fig. 3, the lower flow stabilizer assembly 5 further comprises a lower baffle plate 52, the lower baffle plate 52 is located below the fluid channel 41 to partially shield the at least two flow deflectors 51, the lower baffle plate 52 can be fixed on the flow deflectors 51, but the lower baffle plate 52 can be fixed in other manners. The lower baffle 52 prevents the fluid from directly impacting the next bed of solid particles. Preferably, the lower baffle 52 and the middle baffle 4 are parallel to each other. Parallel means that the angle between the middle baffle 4 and the lower baffle 52 along the extension of the length direction (specifically, the angle smaller than 90 degrees is formed) is not more than 5 degrees.

In some embodiments, the lower baffle 52 equivalent diameter is greater than the fluid channel 41 equivalent diameter. Thus, the lower baffle 52 can better block the direct impact of the fluid entering below the lower baffle 52 from the fluid channel 41 on the stable swirling flow in the next bed of solid particles.

In some embodiments, if the diameter of the adsorption column is large, as shown in fig. 2, the fluid distribution means may comprise a plurality of fluid distributors, each of which has the same radial cross-sectional area. The shape and the structure of each fluid distributor are consistent, the fluid distributors are easy to process and manufacture in batches, the amplification effect possibly caused by inconsistent shapes is avoided, and the large-scale adsorption tower for placing the fluid distribution device is facilitated. Specifically, the at least two fluid distributors are uniformly arranged along 360 degrees, so that the distribution effect of the fluid distributors is more uniform, and the fluid is more uniformly mixed before reaching the next solid particle bed, as shown in fig. 1, 18 fluid distributors are uniformly distributed along a circle of 360 degrees. The number of flow distributors can be calculated according to the fluid mechanics convention in the prior art, and the distribution of other numbers of flow distributors is similar to the above arrangement, so as to satisfy the flow pressure condition of the fluid.

In some embodiments, the ratio of the spacing of the upper baffle 32 and the lower baffle 52 to the equivalent diameter of the fluid passageway 41 is between 0.4 and 1.6. The ratio of the distance between the upper baffle plate 32 and the lower baffle plate 52 to the equivalent diameter of the fluid channel 41 is an optimal ratio range calculated according to fluid mechanics, and the overall thickness of the fluid distributor is minimized on the premise of ensuring that the pressure drop and the fluid distribution effect are not influenced.

In some embodiments, as shown in fig. 3, the fluid dispenser further comprises an access duct 5, one end of the access duct 5 is connected with the upper plate 1 and is opened to the inside of the fluid dispenser, and the other end is opened to the outside of the fluid dispenser, so as to send the fluid out of the fluid dispenser or convey the fluid outside the fluid dispenser to the inside of the fluid dispenser.

In some embodiments, as shown in fig. 3, the access duct 5 is located above the upper baffle 32 and is not directly connected to the upper baffle 32. The inlet and outlet pipe 5 is not directly connected with the upper baffle 32, and the inlet and outlet pipe 5 can be installed after arriving at the site, thereby being convenient for transportation and easy for site installation.

The working principle of the fluid distribution device is as follows: referring to fig. 4 and 5, the fluid is gathered into the fluid distributor from the upper surface layer 1, and is fully mixed by the action of the upper baffle 32 and the swirl guide vanes 31, and then enters the fluid channel 41 to be sent to the lower flow stabilizing assembly, the upper baffle 32 can effectively distribute the fluid from the upper surface layer 1, so as to prevent the fluid from directly impacting the stable swirl induced by the swirl guide vanes 31, the swirl guide vanes 31 can convert the flow pattern of the fluid into a stable swirl by using the kinetic energy and static pressure of the fluid entering the fluid distributor, so that the fluid from the upper surface layer 1 is uniformly mixed on the upper side of the fluid channel 41, and the swirl can promote the fluid to be uniformly distributed after passing through the fluid channel 41, and the fluid passes through the lower surface layer 2 of the fluid distributor under the action of the lower baffle 52 and the guide plate 51. That is, the fluid distributor serves to converge the fluid into an area corresponding to the fluid channel 41 and make the fluid flow in the area in a rotating manner, i.e. the fluid is mixed similarly to the fluid collected in the container with stirring function, so that a good fluid mixing effect can be achieved; meanwhile, the upper baffle 32 plays a role in preventing the fluid entering from the inlet and outlet pipeline 5 from directly impacting the rotational flow guide vane 31 to enable the rotational flow to be stable, and the rotational flow guide vane 31 plays a role in guiding the fluid instead of baffling or small-hole injection, so that the flowing pressure drop of the fluid is small.

Example two

The embodiment of the utility model provides an adsorption tower, as shown in fig. 1 and fig. 6, which includes a cylinder 100, a plurality of solid particle beds 7, and the fluid distribution device 300, wherein the cylinder 100 is provided with a central pillar 200 along an axial direction, the plurality of solid particle beds 7 are arranged inside the cylinder 100 at intervals, and the fluid distribution device 300 is arranged between each two layers of solid particle beds 7 and between the central pillar 200 and an inner wall of the cylinder 100.

The fluid distributor of the adsorption tower provided by the embodiment of the utility model has the function of collecting the fluid from the upper layer of solid particle bed layer, and sending the fluid out of the adsorption tower through the material inlet and outlet pipeline, or fully mixing the fluid with the fluid sent from the material inlet and outlet pipeline under the action of the upper baffle plate and the rotational flow guide vanes, then sending the fluid into the fluid channel and sending the fluid to the lower flow stabilizing assembly, wherein the upper baffle plate can effectively distribute the fluid from the material inlet and outlet pipeline, and prevent the fluid from directly impacting the stable rotational flow caused by the rotational flow guide vanes, the rotational flow guide vanes can convert the flow pattern of the fluid into the stable rotational flow by utilizing the self kinetic energy and static pressure of the fluid entering the fluid distributor, so that the fluid from the upper layer of solid particle bed and the fluid from the material inlet and outlet pipeline are uniformly mixed on the upper side of the fluid channel, and the rotational flow can promote the uniform distribution of the fluid after passing through the fluid channel, and the fluid passes through the lower baffle plate, And under the action of the guide plate, the fluid passes through the lower surface layer of the fluid distributor and is uniformly distributed before entering the surface of the next solid particle bed layer. In the adsorption tower, the rotational flow guide vanes play a role in guiding fluid, and compared with a mode of baffling by adopting multiple baffle plates or spraying small fluid holes, the pressure drop of the fluid flow is smaller; the inside of the fluid distributor is divided into three fluid distribution units with equal radial cross-sectional areas, the internal structure of each fluid distribution unit is the same, the minimum circulation unit of the fluid is still the fluid distribution unit in the monolithic fluid distributor, the same internal structure of the fluid distribution unit is still used for mixing and redistributing, and the amplification effect of the adsorption tower is favorably eliminated.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the utility model.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

Claims (14)

1. The utility model provides a fluid distribution device, its characterized in that includes two at least fluid distributor, fluid distributor includes inside baffle, outside baffle and two radial curb plates, outside baffle is circular-arcly, and inside baffle and outside baffle are connected with two radial curb plates respectively and are formed a cavity, be provided with a plurality of fluid distribution unit in the cavity, every fluid distribution unit includes upper plate, lower plate to and from top to bottom set gradually in upper portion whirl subassembly, intermediate bottom plate, lower part steady flow subassembly between upper plate and the lower plate, wherein:

the upper layer plate and the lower layer plate are parallel, and a plurality of flow guide holes are respectively formed in the upper layer plate and the lower layer plate;

a fluid channel is arranged in the middle of the middle baffle;

the upper rotational flow component comprises an upper baffle plate and at least two rotational flow guide vanes, the at least two rotational flow guide vanes are fixed on the middle baffle plate and are uniformly arranged along 360 degrees by taking the center of the fluid channel as a circle center, and the upper baffle plate is positioned above the fluid channel and is fixed on the at least two rotational flow guide vanes;

the lower flow stabilizing assembly comprises at least two guide plates, and the at least two guide plates are fixed on the lower plate.

2. The fluid distribution device of claim 1 wherein the chamber has a central partition and a radial partition, the central partition being connected at opposite ends to the two radial side plates, and the radial partition being connected at opposite ends to the outer partition and the central partition, for dividing the chamber into three fluid distribution units of equal radial cross-sectional area.

3. The fluid distribution device of claim 1, wherein the swirl guide vanes are circular arc shaped and the ratio of the diameter of the circular arc inside the swirl guide vanes to the equivalent diameter of the fluid passageway is between 0.1 and 10.

4. The fluid distribution device of claim 1, wherein the at least two baffles are uniformly arranged along the lower deck.

5. The fluid dispensing device of claim 1 wherein said upper baffle plate and said intermediate baffle plate are parallel to each other.

6. The fluid dispensing device of claim 1 wherein said upper baffle equivalent diameter is greater than said fluid passageway equivalent diameter.

7. The fluid dispensing device of claim 1 wherein said lower flow stabilizer assembly further comprises a lower baffle plate positioned below said fluid passageway and partially blocking said at least two baffles.

8. The fluid dispensing device of claim 7 wherein said lower baffle plate and said intermediate baffle plate are parallel to each other.

9. The fluid dispensing device of claim 7 wherein said lower baffle equivalent diameter is greater than said fluid passageway equivalent diameter.

10. The fluid distribution device of claim 7 wherein the ratio of the spacing of the upper and lower baffles to the equivalent diameter of the fluid passageway is between 0.4 and 1.6.

11. The fluid dispensing device of claim 1 wherein each of said fluid dispensers has the same radial cross-sectional area.

12. The fluid dispensing device of claim 1 wherein said at least two fluid dispensers are uniformly arranged along 360 degrees.

13. The fluid dispensing device according to any one of claims 1 to 12 wherein the fluid dispenser further comprises an access duct connected at one end to the upper deck and opening into the interior of the fluid dispenser and at the other end opening out of the fluid dispenser for delivering fluid out of or to the interior of the fluid dispenser.

14. An adsorption tower comprising a cylinder, a plurality of solid particle beds, and the fluid distribution device of any one of claims 1 to 13, wherein the cylinder is axially provided with a central pillar, the solid particle beds are arranged inside the cylinder at intervals, and the fluid distribution device is arranged between every two solid particle beds and between the central pillar and the inner wall of the cylinder.

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