CN213433044U - Jet unit for tower plate and large liquid holdup three-dimensional jet tower plate - Google Patents
Jet unit for tower plate and large liquid holdup three-dimensional jet tower plate Download PDFInfo
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- CN213433044U CN213433044U CN202021548141.4U CN202021548141U CN213433044U CN 213433044 U CN213433044 U CN 213433044U CN 202021548141 U CN202021548141 U CN 202021548141U CN 213433044 U CN213433044 U CN 213433044U
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Abstract
The utility model discloses a column plate is with spraying unit, big liquid holdup three-dimensional injection column plate, wherein the spraying unit including spray the cover with install in spray the gas-liquid separation board at cover top, the middle part of the gas lift injection board of spraying the cover forms and supplies liquid to enter into the gap in spraying the cover, the last jet orifice of seting up of gas lift injection board, the jet orifice is located the top in gap, gas lift injection board with form injection passage between the gas-liquid separation board. The utility model discloses can satisfy the requirement of the big liquid holdup of column plate, the individual layer column plate pressure drop is not more than 450 Pa.
Description
Technical Field
The utility model belongs to the technical field of chemical tower internals, a gas-liquid mass transfer equipment among the chemical engineering reaction rectification process is related to, especially relate to a column plate is with spraying unit, the three-dimensional injection column plate of big liquid holdup.
Background
The reactive distillation is a novel separation process with wide application prospect. The reaction and separation processes are completed in the reaction rectifying tower at the same time, the liquid holdup on the tower plate determines the residence time of liquid in the tower, i.e. the reaction time. Because the process requires enough residence time of liquid in the tower, the height of the overflow weir needs to be increased when the tower plates are adopted, so that the height of the liquid layer on the plate reaches the requirement of reaction time, but the tower plates have large pressure drop, small operation elasticity and difficult control, and meanwhile, the treatment capacity is small and the tower plate efficiency is low.
In the current research and report on the large liquid holdup three-dimensional spray column plate, CN1736528A discloses a large liquid holdup spray column plate, wherein a structure of a spray cover and a gas rising pipe is adopted, the structure is complex, a gap is reserved between the spray cover and the gas rising pipe, and the uniformity of the gap between the spray cover and the gas rising pipe cannot be guaranteed during processing; the injection cover is connected to the tower plate by two bolts, and the riser is welded on the tower plate, so that the material consumption is high; in addition, the liquid phase channel in CN1736528A flows into the gas lift tube through the gap between the injection hood and the gas lift tube and contacts with the gas phase to draw the film, the liquid phase flow path is longer, the gap between the injection hood and the gas lift tube is smaller, the liquid phase flow resistance is larger, and the resistance drop of the tower internals is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a spraying unit for column plate to the problem that the resistance of the large liquid holdup spraying column plate tower internals in the prior art is reduced.
The utility model discloses a further aim at provides a big liquid holdup sprays column plate based on injection unit for the column plate.
The utility model also aims to provide a gas-liquid mass transfer method of the large liquid holdup jet column plate.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a spraying unit for a tower plate comprises a spraying cover and a gas-liquid separation plate arranged at the top of the spraying cover, wherein a gap for liquid to enter the spraying cover is formed in a gas-lifting spraying plate of the spraying cover, a spraying hole is formed in the gas-lifting spraying plate and is positioned above the gap, and a spraying channel is formed between the gas-lifting spraying plate and the gas-liquid separation plate.
In the above technical scheme, the upper and lower edges of the gap are fixed with a liquid guide plate.
In the above technical solution, the injection hood is enclosed by two opposite lift gas injection plates and two opposite end plates.
In the above technical solution, the lift gas injection plate is composed of an injection plate and a lift gas plate which are arranged up and down, the gap is formed between the injection plate and the lift gas plate, and the injection hole is opened on the injection plate.
In the above technical scheme, all be fixed with the drain board of an slope on the bottom edge of injection board with the top edge of rising the gas board, the drain board of injection board bottom is located spray the cover outer and slope downwards, and the drain board at rising the gas board top is located spray the cover in and slope upwards, two drain board parallel arrangement, the gap constitutes inlet channel with the drain board that is located its top and bottom.
In the technical scheme, the width of the gap is 5-50mm, the width of the liquid guide plate is 0-100mm, the included angle between the liquid guide plate and the gas lifting plate or the included angle between the liquid guide plate and the injection plate is 90-150 degrees, the height of the gas lifting plate is 0-350mm, the height of the gas lifting plate can be 0, and when the height of the gas lifting plate is 0, the gap is formed at the bottommost part.
The utility model discloses an on the other hand, the three-dimensional injection column plate of big liquid holdup, including the column plate body, it has regular spread's diaphragm orifice, each to open on the column plate body correspond on the diaphragm orifice and install one the injection unit.
In the technical scheme, the included angle between the gas lifting plate and the tower plate body is 5-150 degrees.
In the technical scheme, the plate holes are rectangular, trapezoidal or circular, the number of rows of the plate holes is 1-25, the aperture ratio of the tower plate is 1-25%, the gas lifting plate is rectangular or trapezoidal, and the end plate is trapezoidal or rectangular.
In the technical scheme, a down-flow plate overflow weir is formed between the tower plate body and the down-flow plate on one side, a liquid receiving disc is arranged on the other side of the tower plate body, and preferably, the height of the down-flow plate overflow weir is 20-450 mm.
In the above technical solution, the bottom of the gas lift plate is welded to the upper surface of the tray body, and both sides of the spray plate and both sides of the gas lift plate are respectively welded to the edges of the end plates.
The utility model discloses an on the other hand, the gas-liquid mass transfer method of big liquid holdup injection column plate, gaseous from the diaphragm orifice entering injection unit of column plate body, when gaseous entering injection unit rose, liquid enters into in the injection unit through the gap at lift-off injection plate middle part under the effect of drain trap to being blown by gas and drawing into the liquid film, the liquid film is at the in-process that is promoted by gas, under the effect of surface tension, break into the liquid drop in injection orifice department, the gas-liquid mixture flows by jet orifice and jet passage blowout, by top spun gas-liquid mixture flow at gas-liquid separation board department separation.
Compared with the prior art, the beneficial effects of the utility model are that:
1. when the tower plate interval is more conventional 500 or 600mm, the height of the supernatant liquid layer on the tower plate can be randomly adjusted within the range of 20-450mm so as to meet the requirement of a rectification system on large liquid holdup, meanwhile, within the height range of the liquid layer, the pressure drop of a single-layer tower plate is not more than 450Pa, under the same operation condition, the energy is saved, the operation elasticity and the tower plate separation efficiency are higher than those of a common tower plate.
2. Compared with the prior art, the utility model discloses a feed liquor channel flow shortens, and liquid phase flow resistance reduces, and the resistance of tower internals falls lessly.
3. The gap that supplies liquid to enter into in the injection cover sets up in the middle part of rising gas injection board, can effectively improve the liquid holdup of column plate, and the resistance that has effectively reduced tower internals is fallen in the setting of drain board simultaneously.
Drawings
Fig. 1 shows a partial cross-sectional view of a spray unit.
Fig. 2 is a front view of the spray unit.
FIG. 3 is a side view of a spray tray.
FIG. 4 is a top view of a spray tray.
Fig. 5 is a cross-sectional view taken along the plane a-a in fig. 4.
In the figure: 1-gas-liquid separation plate, 2-gap, 3-jet hole, 4-end plate, 5-jet plate, 6-gas lifting plate, 7-liquid guide plate, 8-column plate body, 9-down-flow plate, 10-liquid receiving plate and 11-tower body.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A spray unit for a tower plate comprises a spray cover and a gas-liquid separation plate 1 arranged on the top of the spray cover, wherein a gap 2 for liquid to enter the spray cover is formed in the middle of a gas-lift spray plate 5 of the spray cover, a spray hole 3 is formed in the top of the gas-lift spray plate 5 of the spray cover, and a spray channel is formed between the gas-lift spray plate and the gas-liquid separation plate 1.
The injection cover can be an integrally formed cylindrical structure, and can also be formed by enclosing two opposite lift gas injection plates and two opposite end plates 4. The cross-sectional area of the spraying cover can be the same from bottom to top, can also be reduced gradually, preferably in a gradually-reduced arrangement mode, and the cross-section of the spraying cover is circular, square or rectangular, preferably rectangular.
The lift gas injection plate can be an integrally formed plate, the gap 2 is formed in the middle, the injection hole 3 is formed in the upper portion, and more preferably, the lift gas injection plate is composed of an injection plate 5 and a lift gas plate 6 which are arranged up and down, the gap 2 is formed between the injection plate 5 and the lift gas plate 6, and the injection hole 3 is formed in the injection plate 5. The height of the gas lifter plate 6 is processed according to the calculated height of the process
In order to enable liquid to smoothly draw a film along with a gas phase, an inclined liquid guide plate 7 is fixed on the bottom edge of the spraying plate 5 and the top edge of the gas lifting plate 6, the liquid guide plate 7 at the bottom of the spraying plate 5 is positioned outside the spraying cover and is inclined downwards, the liquid guide plate 7 at the top of the gas lifting plate 6 is positioned inside the spraying cover and is inclined upwards, the two liquid guide plates 7 are arranged in parallel, and the gap 2 and the liquid guide plates 7 positioned above and below the gap form a liquid inlet channel. The liquid guide plate 7 enables liquid phase to flow more smoothly, the resistance is smaller, and gas-liquid contact is more sufficient. Compare in the liquid phase channel structure in CN1736528A, the utility model discloses liquid directly gets into through drain board 7, and the flow is shorter, the resistance is littleer, and tower internals resistance reduces lower, and is more energy-conserving during the application.
Preferably, the width of the gap 2 is 5-50mm, the width of the liquid guide plate 7 is 0-100mm, the included angle between the liquid guide plate 7 and the gas lift plate 6 or the included angle between the liquid guide plate 7 and the injection plate 5 is 90-150 degrees, and the height of the gas lift plate 6 is 0-350 mm.
Example 2
The large liquid holdup three-dimensional jet tray comprises a tray body 8, wherein the tray body 8 is provided with regularly arranged plate holes, and each plate hole is provided with a jet unit as described in embodiment 1. The bottom of the gas lifting plate 6 is welded on the upper surface of the tower plate body 8, and the two sides of the jet plate 5 and the two sides of the gas lifting plate 6 are respectively welded on the edge of the end plate 4. Compare the structure in CN1736528A, this utility model only has a structure, directly welds with the column plate, does not have the gas lift pipe, and the structure is simpler, and processing is more convenient, practices thrift the consumptive material.
Preferably, the included angle between the gas-lifting plate 6 and the tray body 8 is 5-150 degrees, the plate holes are rectangular, trapezoidal or circular, the number of the plate holes is 1-25, the aperture ratio of the tray is 1-25%, the gas-lifting plate 6 is rectangular or trapezoidal, the end plate 4 is trapezoidal or rectangular, a liquid-falling plate overflow weir is formed between the tray body 8 and the liquid-falling plate 9 on one side, a liquid-receiving plate 10 is arranged on the other side of the tray body 8, and preferably, the height of the liquid-falling plate overflow weir is 20-450 mm.
Gas passes through the injection unit from the below of column plate body 8, and gas need not to pass through the liquid layer on the column plate body 8, and when gas got into the injection unit and rises, liquid got into in the injection unit through drain 7 to being blown and drawn into the liquid film by gas, the liquid film is at the in-process that is promoted by gas, under the effect of surface tension, breaks into the liquid drop in injection hole 3 department. This gas-liquid mixture flow is ejected from the ejection hole 3 and the ejection passage. The gas-liquid mixed flow sprayed from the top is separated at the gas-liquid separation plate 1, the liquid phase falls back to the column plate body 8 under the action of gravity, and the gas phase bypasses the gas-liquid separation plate 1 under the action of pressure difference and rises to the upper column plate. The liquid falling back onto the tray body 8 flows to the next tray through the downcomer.
In a phi 600 experimental tower, cold die experiments are carried out by adopting air and water systems under normal pressure, and 1 layer of common float valve tower plates are arranged in the tower and used as a common plate tower plate structure and a large liquid holdup three-dimensional jet tower plate for carrying out comparison experiments.
Example 2.1
The tower body 11 is internally provided with a large liquid holdup three-dimensional jet tower plate structure, and the parameters are as follows:
the area of the downcomer plate/the sectional area of the tower is 14.2 percent, the opening rate of the tower plate is 8.87 percent (4 rectangular holes 30x 210), the plate spacing is 500mm, the weir height is 150mm, and the bottom clearance height of the downcomer plate is 50 mm.
The spray hood in this embodiment is enclosed by two opposing lift jet plates and two opposing end plates. The cross-sectional area of the injection cover is gradually reduced from bottom to top, and the cross section of the injection cover is rectangular.
The gas lift injection plate is composed of an injection plate and a gas lift plate which are arranged up and down, a gap is formed between the injection plate and the gas lift plate, and the injection hole is formed in the injection plate.
The bottom edge of the injection plate and the top edge of the gas lifting plate are both fixed with an inclined liquid guide plate, the liquid guide plate at the bottom of the injection plate is positioned at the outer side of the injection cover and inclines downwards, the liquid guide plate at the top of the gas lifting plate is positioned at the inner side of the injection cover and inclines upwards, and the two liquid guide plates are arranged in parallel.
The width in gap is 40mm, the width of drain board is 55mm, the contained angle between drain board and the gas lift plate or the contained angle between drain board and the injection board is 120, the gas lift plate height is 120 mm.
Comparative example 2.1
The tower body 11 is internally provided with 1 layer of common float valve tower plates as common plate type tower plates, and the structural parameters are as follows:
the area of the downcomer plate/the cross section area of the tower is 14.2 percent, the opening rate of the tower plate is 8.87 percent (21 phi 39 holes), the plate spacing is 500mm, the weir height is 150mm, and the bottom clearance height of the downcomer plate is 50 mm. The float valve is sized to minimize pressure drop.
Comparative example 2.2
The tower body 11 is provided with tower plates in CN1736528A application examples, and the structural parameters are as follows:
the area of the downcomer plate/the sectional area of the tower is 14.2 percent, the opening rate of the tower plate is 8.87 percent (4 rectangular holes 30x 210), the plate spacing is 500mm, the weir height is 150mm, and the bottom clearance height of the downcomer plate is 50 mm. The jet unit size is adjusted to minimize pressure drop.
Regulating the flow of gas and liquid, and keeping the flow of liquid at 10m3The tray pressure drop was measured for the two trays of comparative examples 2.1, 2.2 and example 2.1 at different gas phase loads.
Comparative experiment I, the gas flow is 1000m3And h, comparing the pressure drop of the two tower plates under the same empty tower gas velocity:
| tray type | Column plate pressure drop, mmH2O |
| Comparative example 2.1 | 180 |
| Comparative example 2.2 | 50 |
| Example 2.1 | 35 |
Comparative experiment two, the gas flow is 2000m3And h, comparing the pressure drop of the two tower plates under the same empty tower gas velocity:
it can be seen from the above comparative experiments that under the same operating conditions, the pressure drop of the large liquid holdup three-dimensional injection tray is much lower than that of the conventional float valve tray, and is reduced by 80.6% at low load (experiment one) and 88.8% at high load (experiment two).
Compared with the experimental result in CN1736528A, the pressure drop at low load is 50mmH2O, reduced by 30%; 60mmH pressure drop at high load2O, reduced by 25%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (16)
1. The spraying unit for the tower plate is characterized by comprising a spraying cover and a gas-liquid separation plate arranged at the top of the spraying cover, wherein a gap for liquid to enter the spraying cover is formed in the middle of a gas-lifting spraying plate of the spraying cover, a spraying hole is formed in the gas-lifting spraying plate and is positioned above the gap, and a spraying channel is formed between the gas-lifting spraying plate and the gas-liquid separation plate.
2. The spray unit for a tray according to claim 1, wherein a liquid guide plate is fixed to both upper and lower edges of said slit.
3. The spray unit for a tray according to claim 1, wherein said spray hood is enclosed by two opposed lift jet plates and two opposed end plates.
4. The spray unit for a tray according to claim 1, wherein said lift-gas spray plate is composed of a spray plate and a lift-gas plate arranged one above the other, said slit is formed between said spray plate and said lift-gas plate, and said spray holes are opened in said spray plate.
5. The spray unit for a tray according to claim 4, wherein an inclined liquid guide plate is fixed to each of the bottom edge of the spray plate and the top edge of the gas-lift plate, the liquid guide plate at the bottom of the spray plate is positioned outside the spray hood and inclined downward, the liquid guide plate at the top of the gas-lift plate is positioned inside the spray hood and inclined upward, the two liquid guide plates are arranged in parallel, and the slit and the liquid guide plates positioned above and below the slit form a liquid inlet channel.
6. The spray unit for trays of claim 2 wherein the width of said gap is 5 to 50mm and the width of said liquid guide plate is 0 to 100 mm.
7. The spray unit for trays of claim 3 wherein said end plate is trapezoidal or rectangular.
8. The jet unit for trays of claim 4, wherein said gas-lifting plate is rectangular or trapezoidal.
9. The jet unit for trays of claim 4, wherein the height of said gas lifter plate is 0 to 350 mm.
10. The spray unit for trays of claim 5 wherein the angle between the liquid guide plate and the gas lift plate or the angle between the liquid guide plate and the spray plate is 90-150 °.
11. The spray unit for trays of claim 9, wherein the downcomer weir height is 20-450 mm.
12. Three-dimensional jet tray with large liquid holdup, characterized by comprising a tray body, wherein the tray body is provided with regularly arranged plate holes, and each plate hole is correspondingly provided with a jet unit as claimed in any one of claims 1 to 11.
13. The high liquid holdup three-dimensional spray tray according to claim 12, wherein when the gas-lift spray plate is composed of a spray plate and a gas-lift plate arranged one above the other, the angle between the gas-lift plate and the tray body is 5 to 150 °.
14. The large liquid hold-up three-dimensional spray tray according to claim 12, wherein the plate holes are rectangular, trapezoidal or circular, the number of rows of the plate holes is 1 to 25, and the opening ratio of the tray is 1 to 25%.
15. The high liquid holdup three-dimensional spray tray of claim 12, wherein a downcomer overflow weir is formed between the tray body and the downcomer on one side, and a liquid receiving tray is provided on the other side of the tray body.
16. The large liquid holdup three-dimensional spray tray of claim 13, wherein the bottom of the gas lift plate is welded to the upper surface of the tray body, and wherein the two sides of the spray plate and the two sides of the gas lift plate are welded to the edges of the end plates, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021548141.4U CN213433044U (en) | 2020-07-30 | 2020-07-30 | Jet unit for tower plate and large liquid holdup three-dimensional jet tower plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021548141.4U CN213433044U (en) | 2020-07-30 | 2020-07-30 | Jet unit for tower plate and large liquid holdup three-dimensional jet tower plate |
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| Publication Number | Publication Date |
|---|---|
| CN213433044U true CN213433044U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021548141.4U Active CN213433044U (en) | 2020-07-30 | 2020-07-30 | Jet unit for tower plate and large liquid holdup three-dimensional jet tower plate |
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| Country | Link |
|---|---|
| CN (1) | CN213433044U (en) |
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- 2020-07-30 CN CN202021548141.4U patent/CN213433044U/en active Active
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