CN216170047U - Suspension type downcomer - Google Patents
Suspension type downcomer Download PDFInfo
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- CN216170047U CN216170047U CN202122307016.5U CN202122307016U CN216170047U CN 216170047 U CN216170047 U CN 216170047U CN 202122307016 U CN202122307016 U CN 202122307016U CN 216170047 U CN216170047 U CN 216170047U
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- downcomer
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- shaped structure
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Abstract
The utility model provides a suspended downcomer, the bottom of which consists of a bottom plate and a partition plate; the lower part of the partition plate is hermetically connected with the lower tower plate; the bottom plate is provided with an opening; the openings are located on two sides of the partition plate. The product of the utility model divides the liquid flowing through the downcomer quantitatively by improving the bottom structure of the suspension type downcomer, solves the problem of randomness of left-right flow and distribution of the liquid at the bottom of the suspension type downcomer, and can distribute the liquid at the bottom of the downcomer actively and forcibly, thereby ensuring that the liquid-gas ratios of bubbling regions at the left side and the right side of the bottom of the downcomer are the same, and further improving the separation efficiency.
Description
Technical Field
The utility model relates to a column plate type gas-liquid contact device in a chemical separation process (rectification, absorption and steam stripping), in particular to a suspended downcomer.
Background
The application of the tray technology of chemical separation has been in history for decades, and each layer of tray consists of three parts, namely a downcomer, a liquid receiving tray and a bubbling area. The trays can be divided into various types such as single overflow, double overflow, triple overflow, quadruple overflow, six overflow or more overflow according to the number of bubbling regions of each layer of trays.
A suspended downcomer is characterized by the downcomer itself having a floor with openings (usually elongated holes) to allow liquid to flow downward. The biggest advantage of the suspended downcomer compared with the conventional downcomer is that the receiving tray below the downcomer can also become a bubbling zone, which corresponds to an increased area of the bubbling zone, thereby increasing the handling capacity of the tray.
FIG. 1 is a schematic gas-liquid phase flow diagram for a three-overflow tray employing a suspended downcomer, each tray having three bubble zones, with a side downcomer and a waist downcomer. In each bubbling zone, the liquid flows down from the downcomer above, flows transversely through the bubbling zone, is mixed with the gas vertically upward, and then flows into the downcomer on the other side. Each waist downcomer receives liquid from two bubbling regions above it and divides the liquid at the bottom into two bubbling regions below it.
SUMMERY OF THE UTILITY MODEL
In the case of the existing suspended downcomer, if the existing suspended downcomer is a middle downcomer or a waist downcomer, after liquid flows from the bottom of the downcomer to a lower-layer tower plate, the liquid flows freely and randomly to the left and right sides, and the flow distribution on the two sides cannot be actively controlled, so that the existing suspended downcomer has great randomness and uncertainty. For a tray having a plurality of bubbling zones, the tray can achieve a desired separation efficiency only when the ratio of the amount of liquid to the amount of gas (liquid-gas ratio) in each bubbling zone is the same. The amount of gas passed may be different because the area of the sparging area may be different on both sides of the downcomer. The downcomer ensures maximum tray efficiency only by distributing liquid in the ratio of the gas amounts in the bubbling zones on both sides. However, the suspended downcomer commonly used in the industry at present has no function of actively distributing liquid, so that the liquid-gas ratio of bubbling regions at two sides of the bottom of the downcomer cannot be guaranteed to be equal, and the loss of the tower plate efficiency is caused.
The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a suspended downcomer. The technical scheme is as follows:
a suspended downcomer is characterized in that the bottom of the downcomer consists of a bottom plate and a partition plate; the bottom plate is provided with an opening; the lower part of the clapboard is connected with the lower tower plate in a sealing way.
Preferably, the gap between the top of the partition and the bottom plate is less than 100 mm.
Preferably, the partition is connected with the bottom plate in a closed manner.
Preferably, the upper part of the clapboard is provided with an opening.
Preferably, the height of the partition is 50-500 mm.
Preferably, the bottom plate is of a V-shaped structure.
Preferably, the ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the floor is 0.2-0.8.
Preferably, the bottom plate is of a V-shaped structure as a whole.
Preferably, the height of the partition is 0mm, and the top point of the V-shaped structure is connected with the lower tower plate in a sealing manner.
Preferably, the shape of the opening of the bottom plate is round, long round, rectangular or overall long strip.
The utility model has the good effects that: for a tray having a plurality of bubbling zones, the tray can achieve a desired separation efficiency only when the ratio of the amount of liquid to the amount of gas (liquid-gas ratio) in each bubbling zone is the same. The amount of gas passed may be different because the area of the sparging area may be different on both sides of the downcomer. The downcomer ensures maximum tray efficiency only by distributing liquid in the ratio of the gas amounts in the bubbling zones on both sides. The product of the utility model divides the liquid flowing through the downcomer quantitatively by improving the bottom structure of the suspension type downcomer and arranging different opening numbers and opening areas on the bottom plate of the downcomer, thereby solving the problem of randomness of left-right flow and distribution of the liquid at the bottom of the suspension type downcomer, and being capable of distributing the liquid at the bottom of the downcomer actively and forcibly, thereby ensuring that the liquid-gas ratios of bubbling areas at the left side and the right side of the bottom of the downcomer are the same, further improving the separation efficiency, reducing the energy consumption of equipment and saving the production cost.
Drawings
FIG. 1 is a schematic flow diagram of liquid and gas over a conventional downcomer triple overflow tray;
FIG. 2 is an enlarged schematic view of a conventional waist downcomer or intermediate downcomer;
FIG. 3 is a schematic of the product of the utility model in a column;
FIG. 4 is an enlarged schematic view of the product of the present invention;
FIG. 5 is an enlarged schematic view of a product of the utility model;
FIG. 6 is an enlarged schematic view of a product of the utility model;
FIG. 7 is an enlarged schematic view of a product of the utility model;
FIG. 8 is an enlarged schematic view of a product of the utility model;
FIG. 9 is an enlarged schematic view of a product of the utility model;
1-waist part; 2-lower tray; 3-V-shaped structure; a 4-sided downcomer; 5-V-shaped structure; 6-a bottom plate; 7-a separator; 8-gap between the top of the partition and the floor.
Detailed Description
The specific implementation contents are described in conjunction with the attached drawings and the application examples of the utility model. FIG. 2 is a schematic view of a conventional waist downcomer or intermediate downcomer, as shown in FIG. 3, a suspended downcomer comprising a waist 1 and a bottom, the bottom of the downcomer being comprised of a bottom plate 6 and a partition 7; the bottom plate is provided with an opening; the lower part of the clapboard 7 is connected with the lower tower plate 2 in a sealing way. The gap 8 between the top of the partition 7 and the bottom plate is less than 100 mm. The partition plate 7 is connected with the bottom plate in a sealing way. The upper part of the clapboard 7 is provided with an opening. The height of the partition board 7 is 50-500 mm; the included angle between the partition plate and the vertical direction is less than 45 degrees. The bottom plate is of a V-shaped structure 3 or a V-shaped structure 5; the included angle of the V-shaped structure is 30-170 degrees. The ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the bottom plate is 0.2-0.8. The whole bottom plate is of a V-shaped structure. The height of the partition board is 0mm, and the top point of the V-shaped structure is connected with the lower tower plate in a sealing manner. The opening of the bottom plate is round, long round, rectangular or overall strip-shaped. The downcomer arranged at the edge is a side downcomer 4. The vertical height of the V-shaped structure is 50-500 mm.
Example one
As shown in fig. 4, a suspended downcomer whose bottom plate is in closed connection with the lower tray. The whole downcomer bottom plate is of a V-shaped structure; the height of the partition board is 0mm, and holes are respectively formed in two sides of the V-shaped structure; the shape of the opening is square. The vertical height of the V-shaped structure is 150 mm. The top of the V-shaped structure is connected with the lower end of the waist part 1 of the downcomer in a closed manner. The included angle of the V-shaped structure is 120 degrees.
Example two
As shown in figure 5, the bottom plate of the suspended downcomer is hermetically connected with the tower plate below the downcomer, and the height of the partition plate is 0 mm. The downcomer floor comprises a horizontal floor and a V-shaped structure; two sides of the V-shaped structure are respectively provided with a hole; the shape of the opening is square. The vertical height of the V-shaped structure is 200 mm. The ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the bottom plate is 0.8. The included angle of the V-shaped structure is 30 degrees.
EXAMPLE III
As shown in fig. 6, a suspended downcomer is composed of a bottom plate and a partition 7 at the bottom of the downcomer; the bottom plate is provided with an opening; the lower part of the clapboard is connected with the lower tower plate in a sealing way. The bottom plate uses the partition plate 7 as a boundary, the number of the openings and the area of the openings on two sides are respectively and independently set, and the openings are circular. The angle between the partition plate and the vertical direction is 0 degree. The vertical height of the partition board is 100 mm. A gap 8 is formed between the top of the partition board and the bottom board, and the width of the gap is 50 mm.
Example four
As shown in fig. 7, a suspended downcomer is composed of a bottom plate and a baffle 7 at the bottom of the downcomer; the bottom plate is provided with an opening; the lower part of the clapboard is connected with the lower tower plate in a sealing way. The bottom plate takes the partition plate 7 as a boundary, two sides of the bottom plate are respectively and independently provided with openings, and the openings are circular; the top of the clapboard is hermetically connected with the bottom plate. The angle between the partition plate and the vertical direction is 10 degrees. The vertical height of the partition board is 80 mm.
EXAMPLE five
As shown in fig. 8, a suspended downcomer is provided, the bottom of which is composed of a bottom plate and a baffle plate; the bottom plate is provided with an opening; the lower part of the clapboard is connected with the lower tower plate in a sealing way. The partition board is connected with the bottom board in a sealing way. The height of the partition board is 70 mm. The bottom plate is of a V-shaped structure. The ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the bottom plate is 0.2. The top point of the V-shaped structure is connected with the lower tower plate in a sealing way. The shape of the opening of the bottom plate is rectangular. The vertical height of the V-shaped structure is 200 mm. The included angle of the V-shaped structure is 30 degrees.
EXAMPLE six
As shown in fig. 9, a suspended downcomer has a bottom plate that is sealingly connected to a lower plate. The bottom plate is of a V-shaped structure. The ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the bottom plate is 0.5. Two sides of the V-shaped structure are respectively provided with a long strip-shaped opening; the vertical height of the V-shaped structure is 150 mm. The included angle of the V-shaped structure is 30 degrees.
The above embodiments are merely some examples of the present invention, and the protection scope of the present invention includes the above embodiments and structures similar to the above embodiments.
The product of the utility model can control the accurate distribution of the liquid at the bottom of the downcomer to the bubbling regions at both sides, so that the liquid-gas ratio of the bubbling regions at both sides below the downcomer is consistent, thereby improving the integral separation efficiency of the tower plate. For example, in a propylene column, the efficiency can be increased by 5 to 10% by using the four bubble zone trays of the present invention.
Claims (9)
1. A suspended downcomer, comprising: the suspended downcomer comprises a waist part and a bottom part, and the bottom part consists of a bottom plate and a partition plate; the bottom plate is provided with an opening; the lower part of the partition plate is hermetically connected with the lower tower plate; the number and area of the openings are configured to provide a quantitative separation of liquid flowing through the downcomer.
2. The suspended downcomer of claim 1, wherein: the gap between the top of the partition board and the bottom board is less than 100 mm.
3. The suspended downcomer of claim 1, wherein: the partition board is connected with the bottom board in a sealing way.
4. The suspended downcomer of claim 3, wherein: the upper part of the clapboard is provided with an opening.
5. A suspended downcomer according to any of claims 1-4, wherein: the height of the partition board is 50-500 mm.
6. The suspended downcomer of claim 1, wherein: the bottom plate is of a V-shaped structure.
7. The suspended downcomer of claim 6, wherein: the ratio of the width of the upper edge of the V-shaped structure to the horizontal width of the bottom plate is 0.2-0.8.
8. The suspended downcomer according to claim 6 or 7, wherein: the height of the partition board is 0mm, and the vertex of the V-shaped structure is connected with the lower tower plate in a sealing mode.
9. The suspended downcomer of claim 1, wherein: the shape of the opening of the bottom plate is circular or rectangular.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122307016.5U CN216170047U (en) | 2021-09-23 | 2021-09-23 | Suspension type downcomer |
| TW111119355A TWI781902B (en) | 2021-09-23 | 2022-05-24 | Multi-bubble zone trays and corresponding tray columns |
| US17/847,924 US11547952B1 (en) | 2021-09-23 | 2022-06-23 | Multi-bubbling region column tray and corresponding plate column |
| EP22183254.6A EP4154958A1 (en) | 2021-09-23 | 2022-07-06 | Multi-bubbling region column tray and corresponding plate column |
| KR1020220084001A KR102435002B1 (en) | 2021-09-23 | 2022-07-07 | Multi-bubbling region column tray and corresponding plate column |
| PCT/CN2022/107537 WO2023045528A1 (en) | 2021-09-23 | 2022-07-22 | Column plate having multiple bubbling zones, and corresponding plate column |
| US18/071,090 US11938425B2 (en) | 2021-09-23 | 2022-11-29 | Multi-bubbling region column tray and corresponding plate column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122307016.5U CN216170047U (en) | 2021-09-23 | 2021-09-23 | Suspension type downcomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216170047U true CN216170047U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122307016.5U Active CN216170047U (en) | 2021-09-23 | 2021-09-23 | Suspension type downcomer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216170047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045528A1 (en) * | 2021-09-23 | 2023-03-30 | 北京泽华化学工程有限公司 | Column plate having multiple bubbling zones, and corresponding plate column |
-
2021
- 2021-09-23 CN CN202122307016.5U patent/CN216170047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045528A1 (en) * | 2021-09-23 | 2023-03-30 | 北京泽华化学工程有限公司 | Column plate having multiple bubbling zones, and corresponding plate column |
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