CN111921217B - Liquid collecting distributor, packing layer structure and rectifying tower - Google Patents
Liquid collecting distributor, packing layer structure and rectifying tower Download PDFInfo
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- CN111921217B CN111921217B CN202010749053.9A CN202010749053A CN111921217B CN 111921217 B CN111921217 B CN 111921217B CN 202010749053 A CN202010749053 A CN 202010749053A CN 111921217 B CN111921217 B CN 111921217B
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- liquid collecting
- flow guide
- rectifying tower
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/008—Liquid distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
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- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a liquid collecting distributor, a packing layer structure and a rectifying tower, wherein the liquid collecting distributor comprises a liquid collecting disc and a liquid redistributor, and the liquid collecting disc can collect descending liquid in the rectifying tower; the liquid redistributor is of an inverted cone structure and is connected below the liquid collecting tray to realize redistribution of liquid in the tower, and the liquid redistributor comprises a flow guide component and a liquid collecting tray, wherein the flow guide component is connected between the liquid collecting tray and is suitable for precision rectification, particularly isotope rectification. Compared with the prior art, the liquid collecting distributor has small volume and height, can save space in the rectifying tower, has large liquid flow operation flexibility, and can improve the separation efficiency of the rectifying tower and the utilization rate of the filler.
Description
Technical Field
The invention relates to the field of chemical separation equipment, in particular to a liquid collecting distributor, a packing layer structure and a rectifying tower.
Background
In the field of precision rectification such as isotope separation, electronic chemicals and the like, the column internal parts are required to be small and compact due to small column diameter and precious materials.
For example, when the separation coefficient is small, a rectifying tower generally used for separating isotopes needs a plurality of theoretical plates and is very high in height, and even the separation efficiency and the production scale of the isotope rectifying tower are improved by adopting a mode of connecting the rectifying towers in series and in parallel.
The design of the internals of the rectification column is therefore of particular importance. A compact and efficient liquid collecting distributor needs to be researched, so that the height of a rectifying tower is saved, the efficiency is improved, the operation stability is improved, the production quality of products is stabilized, and the economic benefit is improved.
Common liquid collectors are:
1) the curtain board type liquid collector is mainly distributed below the packing layer, and is provided with three liquid collectors, namely an integral curtain board type liquid collector, a distributed type liquid collector and a supporting type liquid collector according to the structural form.
2) The gas-lift pipe type liquid collector is mainly used for rectifying tower with side line leading-out, and has relatively high resistance but relatively good gas phase distribution uniformity. The collector has an integral collector and a split collector according to the structure.
The liquid redistributor has:
1) the combined liquid redistributor is formed by combining a conventional liquid collector and a liquid distributor, and the liquid redistributor occupies small space and is easy to leak liquid;
2) the distributor is similar to the disc collector, and the lower end of the collector is provided with holes for redistribution.
3) The wall flow collecting redistributor is relatively suitable for a packed tower with a small tower diameter, but the purity of a rectification product is influenced because the peripheral sealing ring is provided with a sealing material, so the wall flow collecting redistributor is generally placed in a stripping section.
Traditional liquid collection distributor is all accomplished by two equipment of distributor and collector respectively, and the height is higher than in addition, and is bulky, occupies the rectifying column inner space, and distributor design flow operating range is little, blocks up easily, causes the wall flow, influences liquid and at the distribution effect, and this has influenced the height of accurate rectifying column at to a great extent, has also crowded the effective height that has occupied the filler simultaneously.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a liquid collecting distributor, a packing layer structure and a rectifying tower.
The purpose of the invention can be realized by the following technical scheme:
the liquid collecting distributor comprises a liquid collecting disc and a liquid redistributor, wherein the liquid collecting distributor specifically comprises the following components:
the liquid collecting tray can collect liquid descending in the rectifying tower;
the liquid redistributor is of an inverted cone structure and is connected below the liquid collecting tray to realize redistribution of liquid in the tower, and the liquid redistributor comprises a flow guide component and a liquid collecting tray, wherein the flow guide component is connected between the liquid collecting tray and the liquid collecting tray.
Furthermore, the flow guide assembly comprises flow guide wires, and a plurality of flow guide wires surround the side wall of the inverted cone-shaped flow guide assembly;
one end of the flow guide wire is connected to the liquid collecting disc, and the other end of the flow guide wire is connected with the liquid collecting disc. The flow guide wire can guide liquid on one hand and can fix guided bulk fillers on the other hand.
Further, the number of the flow guide wires is more than 3, and the distance between the flow guide wires is 1-10 mm, preferably 2-5 mm, and more preferably 3 mm.
Furthermore, the taper of the flow guide wire is 1: 1-10, preferably 1: 1-2, and more preferably 1: 1.5.
Furthermore, the flow guide wire is connected to the liquid collecting tray and the liquid collecting tray in a welding mode.
Furthermore, the diameter of the flow guide wire is 1-5 mm, preferably 2-3 mm, and more preferably 2 mm.
Furthermore, the current guide wire is a metal wire such as a stainless steel wire and a copper wire.
Furthermore, the flow guide assembly also comprises random packing, and the random packing is filled in the side wall of the flow guide assembly formed by the plurality of flow guide wires in a surrounding manner.
Further, the random packing is one of theta-shaped, rolled, flaky, circular arc-shaped, corrugated plate and corrugated net, so that the liquid can be collected to the central position of the distributor effectively.
Further, the inside wall of liquid collecting tray is petal type concave arc surface structure, the lateral wall has 5 ~ 60% slope. The gradient is preferably 15 to 40%, and more preferably 30 to 40%. The collecting tray surface in the shape is in full contact with the wall of the rectifying tower, so that on one hand, all liquid can be better collected, liquid channeling or excessive gathering is avoided, and on the other hand, the petal shape plays a good flow guiding effect, so that the liquid can more uniformly flow to the central position.
Furthermore, the side wall of the liquid collecting tray is arranged close to the inner wall of the rectifying tower;
the liquid descending in the rectification tower is collected to the inside of the liquid redistributor through the inner side of the liquid collecting tray.
Furthermore, a plurality of distribution holes are formed in the liquid collecting disc, so that the liquid collected in the liquid collecting disc is uniformly distributed in the rectifying tower. On the one hand, the liquid can be more uniformly distributed to the rectifying tower, and on the other hand, the liquid can have wider flow operation range.
Further, the liquid collecting distributor is suitable for a rectifying tower with the tower diameter of less than 300 mm.
When the liquid collecting distributor is applied to a packing layer structure of a rectifying tower, the liquid collecting distributor is limited on the inner wall of the rectifying tower through one of slotted fixing, fastening threads and clamping fixing.
The distributor is fixed in the rectifying tower in three ways: one is fixed in a slotted mode, namely 3-8 supporting points are arranged at the outermost end of the distributor, a slotted opening is correspondingly formed in the inner wall of the rectifying tower, and the distributor can be fixed in the rectifying tower by mutually matching and rotating for a certain angle; one is a fastening thread structure, the distributor is fixed at a certain position on the inner wall of the tower, and then a fixing thread hidden on the edge of the distributor is screwed to fix the distributor; the other mode is direct fixation, namely a notch is formed in the inner wall of the rectifying tower, and a supporting point at the outer end of the distributor is clamped in the notch to be directly pressed and fixedly installed.
Compared with the prior art, the invention has the following advantages:
1) the liquid collecting distributor in the technical scheme has small volume and height, can save space in the tower, has large liquid flow operation elasticity, can be used for precise rectification, particularly isotope rectification, and can improve the separation efficiency of the rectification tower and the utilization rate of the filler.
2) The liquid redistributor is of an inverted cone structure and has an excellent flow guiding effect, the inverted cone structure is beneficial to guiding collected liquid to a central position, liquid leakage cannot occur under the action of flow guiding wires, a larger flow operation range is provided, the separation efficiency can be improved by filling in the flow guiding wires, the collected liquid is regular and collected in a laminar flow shape, the three are closely combined together, the structure is compact, the height is controllable, the space in the tower can be well saved, and the utilization rate of the filling is improved.
Drawings
FIG. 1 is a schematic perspective view of a liquid collection distributor according to the present invention;
FIG. 2 is a schematic cross-sectional view of a liquid collection distributor according to the present invention.
In the figure: 1. the liquid collecting tray 2, the liquid collecting tray 3, the flow guide wire 4 and the distributing holes.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example 1
The liquid collecting distributor in this embodiment comprises a liquid collecting tray 1 and a liquid redistributor. See fig. 1 and 2.
The liquid collecting tray 1 is capable of collecting liquid descending in the rectifying tower. The inside wall of liquid collecting tray 1 is petal type concave arc surface structure, the lateral wall has 5 ~ 60% slope. The side wall of the liquid collecting tray 1 is arranged close to the inner wall of the rectifying tower; the descending liquid in the rectification column is collected to the inside of the liquid redistributor through the inside of the liquid collecting tray 1.
The liquid redistributor is of an inverted cone structure and is connected below the liquid collecting tray 1 to realize redistribution of liquid in the tower, and comprises a flow guide component and a liquid collecting tray 2, wherein the flow guide component is connected between the liquid collecting tray 1 and the liquid collecting tray 2.
The flow guide assembly comprises flow guide wires 3, and a plurality of flow guide wires 3 enclose the side wall of the inverted cone-shaped flow guide assembly; one end of the flow guide wire 3 is connected to the liquid collecting disc 1, and the other end of the flow guide wire is connected to the liquid collecting disc 2. The flow-guiding wire 3 can guide liquid on one hand and can fix guided bulk filling on the other hand. When the device is specifically implemented and selected, the number of the flow guide wires 3 is larger than 3, the distance between the flow guide wires 3 is 1-10 mm, the flow guide wires 3 are connected to the liquid collecting disc 1 and the liquid collecting disc 2 in a welding mode, the diameters of the flow guide wires 3 are 1-5 mm, the taper degrees of the flow guide wires are 1: 1-10, preferably 1: 1-2, more preferably 1: 1.5, and the flow guide wires 3 are metal wires such as stainless steel wires and copper wires. The flow guide assembly further comprises random packing, and the random packing is filled in the side wall of the flow guide assembly formed by the plurality of flow guide wires 3 in a surrounding mode. The random packing is one of theta shape, roll shape, sheet shape, circular arc shape, corrugated plate and corrugated net shape, so that the liquid can be collected to the central position of the distributor effectively.
The liquid collecting tray 2 is provided with a plurality of distribution holes 4, so that the liquid collected in the liquid collecting tray is uniformly distributed in the rectifying tower. On the one hand, the liquid can be more uniformly distributed to the rectifying tower, and on the other hand, the liquid can have wider flow operation range.
When being applied to the packing layer structure of the rectifying tower, the liquid collecting distributor is limited on the inner wall of the rectifying tower through one of the slotted fixing, the fastening thread and the clamping fixing. The distributor in this embodiment is fixed in the rectification column by three ways: one is fixed in a slotted mode, namely 3-8 supporting points are arranged at the outermost end of the distributor, a slotted opening is correspondingly formed in the inner wall of the rectifying tower, and the distributor can be fixed in the rectifying tower by mutually matching and rotating for a certain angle; one is a fastening thread structure, a distributor is fixed at a determined position on the inner wall of a tower, and then a fixing thread hidden on the edge of the distributor is screwed to fix the distributor; the other mode is direct fixation, namely a notch is formed in the inner wall of the rectifying tower, and the supporting point at the outer end of the distributor is clamped in the notch to be directly pressed and fixedly installed.
Specifically, the liquid collecting distributor in the embodiment is subjected to performance test, wherein the outer diameter is 50mm, the guide wires are stainless steel wires with the diameter of 0.5mm, the distance between the guide wires is 1mm, theta annular bulk packing made of 100-mesh stainless steel wires is filled in the guide wires, 6 small holes with the diameter of 6mm are uniformly formed in the bottom of the liquid accumulating plate, the overall height of the combined liquid redistributor is 50mm, the combined liquid redistributor is fixed in a rectifying tower through threads and is installed in a precise rectifying tower of DN 50. Through using the distributor in this embodiment, compare traditional collector and distributor and short 30 ~ 50mm, the effectual space of having practiced thrift the tower, the filling efficiency of packing can improve 30 ~ 50 mm. Under the same condition, the theoretical plate number of the rectifying tower can reach 22 blocks/m.
Example 2
Specifically, the liquid collecting distributor in this embodiment is subjected to a performance test, wherein the outer diameter is 200mm, the guide wires are stainless steel wires with the diameter of 2mm, the distance between the guide wires is 5mm, rolled bulk packing made of a 150-mesh stainless steel wire mesh is filled inside the guide wires, 10 small holes with the diameter of 6mm are uniformly formed in the liquid collecting tray at the bottom, the overall height of the combined liquid redistributor is 200mm, and the combined liquid redistributor is installed in a chemical exchange tower of DN200 in a direct compression fixing mode. Through using the distributor in this embodiment, shorter 50 ~ 100mm than traditional collector and distributor, the effectual space of having practiced thrift the tower, the filling efficiency of packing can improve 50 ~ 100 mm. Under the same condition, the theoretical plate number of the rectifying tower can reach 20 blocks/m.
Comparative example 1
A comparative experiment was carried out under the same conditions for example 1, using a precision rectifying column of DN50, with a height of 100mm and an external diameter of 50mm, using a conventional liquid collector and distributor, by using the distributor of this comparative example.
Since the overall distributor height was 100mm, 50mm higher than in example 1. Therefore, the space in the column is reduced, the packing efficiency of the packing is lowered, and the effective height of the packing is lowered by 50 mm. Under the same conditions, the theoretical plate number of the rectifying tower is only 15 blocks/m.
It can be seen from this that the back taper structure in embodiment 1 and 2 has excellent water conservancy diversion effect, the back taper knot has the structure to do benefit to the liquid direction central point position of collecting, under the effect of water conservancy diversion silk, the weeping can not take place, there is bigger flow operation scope, pack in the water conservancy diversion silk except can improving separation efficiency, it is regular also to make the collection liquid, it collects to be laminar flow, the inseparable combination of these three is in the same place, compact structure, highly controllable, the space in the saving tower that can be fine, thereby improve the utilization ratio of packing.
The embodiments described above are intended to facilitate a person of ordinary skill in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (6)
1. A liquid collection distributor, comprising:
a liquid collecting tray (1) for collecting the liquid descending in the rectifying tower;
the liquid redistributor is of an inverted cone structure and is connected below the liquid collecting tray (1) to redistribute liquid in the tower, and the liquid redistributor comprises a flow guide component and a liquid collecting tray (2), wherein the flow guide component is connected between the liquid collecting tray (1) and the liquid collecting tray (2);
the flow guide assembly comprises flow guide wires (3), and a plurality of flow guide wires (3) enclose the side wall of the inverted cone-shaped flow guide assembly;
one end of the flow guide wire (3) is connected to the liquid collecting disc (1), and the other end of the flow guide wire is connected with the liquid collecting disc (2);
the number of the flow guide wires (3) is more than 3, the diameter of the flow guide wires (3) is 1-5 mm, the distance between the flow guide wires (3) is 1-10 mm, and the flow guide wires (3) are connected to the liquid collecting tray (1) and the liquid collecting tray (2) in a welding mode;
the inner side wall of the liquid collecting disc (1) is of a petal-shaped concave cambered surface structure, and the side wall has a gradient of 5-60%;
the side wall of the liquid collecting tray (1) is arranged close to the inner wall of the rectifying tower;
the descending liquid in the rectifying tower is collected to the interior of the liquid redistributor through the inner side of the liquid collecting tray (1).
2. The liquid collecting and distributing device of claim 1, wherein the flow guiding assembly further comprises random packing, the random packing is filled inside the side wall of the flow guiding assembly formed by the flow guiding wires (3), and the taper of the flow guiding wires (3) is 1: 1-10.
3. The liquid collection distributor of claim 2, wherein the random packing is one of theta-shaped, rolled, sheet-shaped, arcuate, corrugated mesh.
4. A liquid collection distributor according to claim 1, wherein the drip pan (2) is provided with a plurality of distribution holes (4) so that the liquid collected in the drip pan is distributed evenly to the rectification column.
5. A packing layer structure of a rectifying tower is characterized by comprising the liquid collecting distributor according to any one of claims 1 to 4, wherein the liquid collecting distributor is limited on the inner wall of the rectifying tower through one of slotted fixing, fastening threads and clamping fixing.
6. A packed rectifying column, characterized in that a packing layer comprises the liquid collecting distributor according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010749053.9A CN111921217B (en) | 2020-07-30 | 2020-07-30 | Liquid collecting distributor, packing layer structure and rectifying tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010749053.9A CN111921217B (en) | 2020-07-30 | 2020-07-30 | Liquid collecting distributor, packing layer structure and rectifying tower |
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| Publication Number | Publication Date |
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| CN111921217A CN111921217A (en) | 2020-11-13 |
| CN111921217B true CN111921217B (en) | 2022-07-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2668213Y (en) * | 2003-09-26 | 2005-01-05 | 上海化工研究院 | Mass transfer exchange tower for producing nitrogen-15 |
| CN102423541A (en) * | 2011-11-01 | 2012-04-25 | 沈阳创达技术交易市场有限公司 | Modified liquid redistribution device |
| CN209155145U (en) * | 2018-12-07 | 2019-07-26 | 宁夏弘翊航空油料有限公司 | Distilling apparatus is used in a kind of extraction of isooctane |
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2020
- 2020-07-30 CN CN202010749053.9A patent/CN111921217B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2668213Y (en) * | 2003-09-26 | 2005-01-05 | 上海化工研究院 | Mass transfer exchange tower for producing nitrogen-15 |
| CN102423541A (en) * | 2011-11-01 | 2012-04-25 | 沈阳创达技术交易市场有限公司 | Modified liquid redistribution device |
| CN209155145U (en) * | 2018-12-07 | 2019-07-26 | 宁夏弘翊航空油料有限公司 | Distilling apparatus is used in a kind of extraction of isooctane |
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| CN111921217A (en) | 2020-11-13 |
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