CN107854859B - Multipurpose liquid-lowering structure - Google Patents
Multipurpose liquid-lowering structure Download PDFInfo
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- CN107854859B CN107854859B CN201711146274.1A CN201711146274A CN107854859B CN 107854859 B CN107854859 B CN 107854859B CN 201711146274 A CN201711146274 A CN 201711146274A CN 107854859 B CN107854859 B CN 107854859B
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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
- B01D3/14—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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- 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
- B01D3/324—Tray constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention provides a multipurpose liquid-dropping structure, which comprises a tower body, a plurality of layers of tower plates arranged along the radial direction of the tower body and a down-flow pipe zone arranged at two sides of the tower plate and used for guiding liquid of an upper layer of tower plate to a lower layer of tower plate, wherein a liquid-dropping plate is arranged in the down-flow pipe zone along the axial direction of the tower body and divides the down-flow pipe zone into a liquid distribution zone close to the tower plate and a liquid holding zone far away from the tower plate, a liquid distribution plate connected with the liquid-dropping plate and the side wall of the liquid distribution zone is arranged in the liquid distribution zone so as to form a liquid storage tank in the liquid distribution zone, and liquid distribution holes are arranged on the liquid distribution plate and are communicated with the liquid holding zone. The liquid flow on the tower plate is uniform and high in stability, the conversion rate of gas-liquid reaction can be improved, in addition, the invention also has ultra-large liquid holdup, the residence time of the liquid can be increased, the problem of the residence time of the liquid in the reactive rectifying tower can be effectively solved, and the reaction conversion rate is improved.
Description
Technical Field
The invention relates to the technical field of tower internals for gas-liquid mass transfer and heat transfer in the fields of oil refining, chemical industry and the like, in particular to a multipurpose liquid-lowering structure.
Background
The plate tower is one of chemical equipment with great importance in chemical industry, oil refining, pharmacy and other industries. The tower internals technology has gradually developed towards novel, efficient, high-throughput, low-pressure drop and other tower plate technologies along with the development of the chemical industry, such as: the multi-downcomer column plate, the vertical sieve plate, the gas-liquid parallel flow composite column plate and the like are novel high-efficiency column plates which fully utilize the three-dimensional space in the column, increase the gas-liquid mass transfer area and improve the column plate efficiency. The downcomer serves as a part of the tower inner member, not only plays a role of a liquid channel, but also serves as an important space for realizing gas-liquid separation, and plays an important role of balance adjustment in certain tower equipment. Such as reactive distillation columns, require large liquid residence times and reaction spaces; a system tower with larger liquid phase load and larger overflow strength, etc. For these special cases and the cases of large liquid phase load, the common downcomer cannot meet the production operation requirement at all.
At present, the multi-downcomer tower plates, such as an MD (machine direction) sieve plate, a domestic DJ tower plate and the tower plates disclosed in patent with publication number of CN101554538B, CN204891271U, CN202802811U, CN203565083U, CN204637628U, are not good in solving the problem of non-uniformity of liquid flow on the tower plates while solving the problem of large liquid phase load, and are not capable of adjusting the liquid residence time, the reaction space, the ultra-large liquid holdup and the like.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a multi-purpose liquid-lowering structure, so as to solve the problems of uneven liquid flow, inability to adjust liquid retention time and oversized liquid holdup in the tower body in the prior art.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
the utility model provides a multipurpose liquid falling structure, includes the tower body, along the radial multilayer column plate that sets up of tower body and set up in the column plate both sides be used for leading the liquid of upper column plate to the downcomer district of lower floor column plate, be provided with the liquid falling plate along the tower body axial in the downcomer district, the liquid falling plate is divided into the liquid distribution district that is close to the column plate and keeps away from the column plate with the downcomer district, be provided with the liquid distribution board of connecting liquid falling plate and downcomer district lateral wall in the liquid distribution district with be in the liquid distribution district forms the reservoir, be provided with the cloth hole on the liquid distribution board, the reservoir with liquid holding district intercommunication.
Preferably, the liquid distribution holes are one or more of round holes, strip seams, square or polygons.
Preferably, the height of the bottom of the liquid storage tank is higher than the height of the lower layer tower plate, and the height of the liquid holding area is lower than the height of the lower layer tower plate.
Preferably, the lower part of the liquid falling plate is in an arc shape which is folded downwards after being folded transversely to the inner wall of the tower body, and the bottom of the liquid falling plate is not contacted with the bottom of the liquid holding area.
Preferably, the liquid distribution plate is arc-shaped or V-shaped.
Preferably, a spraying device is arranged in the liquid holding area, and a spraying nozzle on the spraying device is arranged on the outer wall of one side of the downcomer area, which is close to the tower plate.
Preferably, the spraying device comprises a liquid storage tank, a pressurizing device arranged on the liquid storage tank, a liquid outlet pipe connected with the pressurizing device and a spraying nozzle communicated with the liquid outlet pipe, wherein the liquid storage tank is further provided with a liquid inlet, the liquid inlet is positioned at the bottom of the liquid storage tank, and the liquid inlet is provided with a one-way valve.
Preferably, an ultrasonic generating device is further arranged in the liquid storage tank.
Preferably, the height of the liquid inlet is not lower than the height of the lower tray.
Preferably, the spraying device further comprises a control device, the control device comprises a controller and a liquid level sensor electrically connected with the controller, the liquid level sensor is arranged in the liquid storage tank, and the pressurizing device is also electrically connected with the controller.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) The liquid reacted with the gas on the lower layer tower plate flows out from the liquid storage tank through the liquid distribution holes at the bottom of the liquid distribution plate, and the liquid is always kept in the liquid storage tank, so that the liquid flow on the lower layer tower plate is uniform and has high stability, and the gas-liquid contact area is ensured; the liquid storage tank has super-strong liquid passing capability, can greatly increase the overflow weir length, reduce the overflow strength of liquid and effectively solve the problem that the liquid-to-air ratio is larger than the liquid amount of a material system
(2) The downcomer zone designed by the invention has super-large liquid holdup, can increase the residence time of liquid, can effectively solve the problem of liquid residence time in the reaction rectifying tower, and improves the reaction conversion rate;
(3) The structural design of the liquid storage tank and the liquid holding area can provide a large enough reaction space for chemical reaction, can serve as a reaction tube, and can be filled with a catalyst and a solid reactant to provide a space required by the reaction;
(4) The invention is also provided with the spraying device in the liquid holding area, and the spraying device is also provided with the control device, so that spraying can be automatically controlled according to the liquid holding amount in the spraying device, the contact time and the contact area of the gas and the liquid are further increased, and the reaction conversion rate is improved; in addition, the spraying device is arranged in the liquid holding area, so that the liquid supplementing of the liquid in the liquid storage tank is not influenced, the stability of liquid flow on the lower layer tower plate is ensured, and meanwhile, redundant liquid in the liquid holding area can be sprayed on gas in the tower body, so that the gas-liquid contact time is further prolonged, and the reaction conversion rate is improved;
(5) The invention has simple structure, is suitable for high-efficiency trays such as floating valve, sieve plate, inclined hole, tongue-shaped tray, novel vertical sieve plate, and the like, and can expand the application range and use system of the corresponding tray by combining the trays, thereby better improving the mass transfer efficiency of the tray.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter particularly pointed out. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and attainments together with a more complete understanding of the invention will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a top view of embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of embodiment 2 of the present invention;
FIG. 4 is a schematic view showing the structure of a spraying device according to embodiment 2 of the present invention;
fig. 5 is a schematic diagram showing a connection structure of a control device according to embodiment 2 of the present invention.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
referring to fig. 1 and 2, a multipurpose liquid-lowering structure comprises a tower body 1, a plurality of layers of trays arranged along the radial direction of the tower body 1, and a liquid-lowering zone 3 arranged at two sides of the trays and used for guiding liquid of an upper layer tray 20 to a lower layer tray 21, wherein a liquid-lowering plate 4 is arranged in the liquid-lowering zone 3 along the axial direction of the tower body, and the liquid-lowering plate 4 divides the liquid-lowering zone 3 into a liquid-distributing zone 30 close to the trays and a liquid-holding zone 31 far away from the trays. The lower part of the liquid-falling plate 4 can be in an arc shape which is folded downwards after being folded transversely to the inner wall of the tower body 1, the bottom of the liquid-falling plate 4 is not contacted with the bottom of the liquid holding area 31 so that liquid can circulate in the liquid holding area 31, and the upper part of the liquid-falling plate 4 and the end side of the lower layer tower plate, which is close to the liquid distribution area, are on the same plane. The liquid-lowering plate 4 may of course also be a vertically arranged plate, the lower part of which is provided with a plurality of through holes, in which case the liquid-lowering plate is arranged between the lower tray 21 and the downcomer zone 3. The liquid distribution area 30 is internally provided with a liquid distribution plate 32 which is connected with the liquid falling plate 4 and the side wall of the downcomer area 3 so as to form a liquid storage tank 33 in the liquid distribution area 30, and in order to enable the liquid falling structure to better hold liquid and adjust the liquid residence time, the height of the bottom of the liquid storage tank 33 is higher than the height of the lower layer tower plate 21, and the height of the liquid holding area 31 is lower than the height of the lower layer tower plate 21, so that the liquid storage tank 33, the lower layer tower plate 21 and the bottom of the liquid holding area 31 are all provided with height differences, and liquid distribution and holding are facilitated. The liquid distribution plate 32 is provided with liquid distribution holes (not shown in the figure), and the liquid distribution holes are round holes, strip seams, square, polygonal or other shapes beneficial to liquid distribution. Since the liquid distributing holes are arranged at the bottom of the liquid storage tank 33, the liquid in the liquid storage tank 33 flows onto the lower layer tower plate 21. In order to make the liquid distribution effect better, the liquid distribution amount and the gas-liquid contact area are increased, and the liquid distribution plate 32 is arranged in an arc shape or a V shape.
In operation, liquid on the upper tray 20 flows into the liquid storage tank 33 and fills the liquid storage tank 33, and the liquid in the liquid storage tank 33 passes through the liquid distribution holes at the bottom of the liquid distribution plate 32 to be subjected to shower-down uniform liquid distribution to the lower tray 21 for contact reaction with ascending gas. When the amount of liquid on the lower tray 21 is large, a part of the liquid flows from the lower tray 21 into the liquid holding section 31 to be stored, thereby preventing the excessive amount of liquid on the lower tray 21 from affecting the reaction conversion rate of the gas-liquid contact reaction. In addition, since the fluid on the lower tray 21 comes from the liquid flowing down from the liquid distribution holes in the liquid storage tank 33, the liquid flow on the tray is uniform and has high stability, so that the gas-liquid contact area is ensured. The liquid storage tank and the liquid holding area arranged in the liquid dropping structure can effectively regulate the liquid holding amount and the liquid residence time, reduce the overflow strength on the tower plate and improve the liquid flow condition, and can also serve as a reaction space in the reaction rectifying tower, thereby improving the mass transfer efficiency, the treatment capacity and the conversion rate of the reaction.
Example 2:
referring to fig. 3, 4 and 5, on the basis of example 1, a spraying device 5 is disposed in the liquid holding area 31, a spraying nozzle 50 on the spraying device 5 is disposed on the outer wall of one side of the downcomer area 3 near the tray, and the spraying nozzle 50 is disposed towards the gas rising from bottom to top in the tower body 1. The spraying device 5 includes a liquid storage tank 51, a pressurizing pump 52 provided on the liquid storage tank 51, a liquid outlet pipe 53 connected to the pressurizing pump 52, and a spraying nozzle 50 communicating with the liquid outlet pipe 53. The bottom of the liquid storage tank 51 is provided with a liquid inlet 54, so that liquid in the liquid holding area 31 conveniently enters the liquid storage tank 51, the liquid inlet 54 is provided with a one-way valve 55, and an opening of the one-way valve 55 is arranged towards the liquid storage tank 51, so that the liquid entering the liquid storage tank 51 does not flow out from the liquid inlet 54. The height of the liquid inlet 54 is not lower than the height of the lower tray 21, so that the plane of the lower tray 21 is always on the liquid level, thereby improving the uniformity and stability of the liquid flow on the lower tray 21. In order to make the liquid mist molecules sprayed from the spray nozzle 50 smaller so as to improve the gas-liquid reaction efficiency, an ultrasonic generating device 56 is further arranged in the liquid storage tank 51, and the ultrasonic generating device 56 can vibrate the liquid molecules at a high frequency so as to generate small liquid drops which pass through the spray nozzle 50, so that the spray with smaller molecules is generated.
The spraying device 5 of the invention is also provided with a control device, the control device comprises a controller 57 and a liquid level sensor 58 electrically connected with the controller 57, the liquid level sensor 58 is arranged at the lower part of the inner wall of the liquid storage tank 51, and the pressure pump 52 is also electrically connected with the controller 57. The control method of the control device is as follows: when liquid enters the liquid storage tank 51 from the liquid holding area 31 through the liquid inlet 54 and the liquid level sensor 58 in the liquid storage tank 51 senses that the liquid level in the liquid storage tank 51 is higher than a preset value, the controller 57 controls the pressurizing pump 52 to work, liquid in the liquid storage tank 51 is sprayed out through the liquid storage tank 51 and the spraying nozzle 50 to form liquid mist, the liquid mist reacts with ascending gas, and the reaction efficiency of gas and liquid is further improved. When the liquid level sensor 58 senses that the liquid level in the liquid storage tank 51 is lower than a preset value, the controller 57 controls the pressurizing pump 52 to stop working, and spray is not applied to the ascending gas.
A multipurpose liquid reducing structure according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the multi-purpose liquid reducing structure set forth in the foregoing disclosure without departing from the scope of the present invention. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. The utility model provides a multipurpose liquid-reducing structure, includes the tower body, along the radial multilayer column plate that sets up of tower body and set up in the column plate both sides be used for leading the liquid of upper column plate to the downcomer district of lower floor column plate, its characterized in that, be provided with the downcomer board along the tower body axial in the downcomer district, the downcomer board divides into the liquid distribution district that is close to the column plate and keeps away from the column plate and hold the liquid district, be provided with the liquid distribution board that connects liquid distribution board and downcomer district lateral wall in the liquid distribution district in order to form the reservoir in liquid distribution district, be provided with the cloth liquid hole on the liquid distribution board, the reservoir with hold the liquid district intercommunication; the spraying device comprises a liquid storage tank, a pressurizing device arranged on the liquid storage tank, a liquid outlet pipe connected with the pressurizing device and a spraying nozzle communicated with the liquid outlet pipe, wherein the liquid storage tank is also provided with a liquid inlet which is positioned at the bottom of the liquid storage tank, and the liquid inlet is provided with a one-way valve; the spray nozzle is arranged towards the gas rising from bottom to top in the tower body.
2. The multipurpose liquid reducing structure of claim 1, wherein the liquid distribution holes are one or more of round holes, slits or polygons.
3. The multipurpose liquid reducing structure according to claim 1, wherein the height of the bottom of the liquid storage tank is higher than the height of the lower tray, and the height of the liquid holding area is lower than the height of the lower tray.
4. The multipurpose liquid-lowering structure of claim 1, wherein the lower part of the liquid-lowering plate is in the shape of a bow which is folded downwards after being folded transversely to the inner wall of the tower body, and the bottom of the liquid-lowering plate is not contacted with the bottom of the liquid-holding area.
5. The multipurpose liquid reduction structure of claim 1, wherein the liquid distribution plate is arc-shaped or V-shaped.
6. The multipurpose liquid reducing structure according to claim 1, wherein a spraying device is arranged in the liquid holding area, and a spraying nozzle on the spraying device is arranged on the outer wall of one side of the downcomer area, which is close to the tower plate.
7. The multipurpose liquid reducing structure as defined in claim 1, wherein an ultrasonic wave generating device is further provided in the liquid storage tank.
8. The multipurpose liquid reducing structure according to claim 6, wherein the height of the liquid inlet is not lower than the height of the lower tray.
9. The multipurpose liquid level reducing structure as defined in claim 1, wherein the spraying device further comprises a control device, the control device comprises a controller and a liquid level sensor electrically connected with the controller, the liquid level sensor is arranged in the liquid storage tank, and the pressurizing device is also electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146274.1A CN107854859B (en) | 2017-11-17 | 2017-11-17 | Multipurpose liquid-lowering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146274.1A CN107854859B (en) | 2017-11-17 | 2017-11-17 | Multipurpose liquid-lowering structure |
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| Publication Number | Publication Date |
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| CN107854859A CN107854859A (en) | 2018-03-30 |
| CN107854859B true CN107854859B (en) | 2023-06-27 |
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| CN201711146274.1A Active CN107854859B (en) | 2017-11-17 | 2017-11-17 | Multipurpose liquid-lowering structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045357A (en) * | 1989-03-08 | 1990-09-19 | 格里奇公司 | Downspout-tower tray assembly |
| CN1378872A (en) * | 2002-01-25 | 2002-11-13 | 蓝仁水 | Tower plate for gas baffling |
| CN1816386A (en) * | 2003-02-06 | 2006-08-09 | 聚尔策化学技术有限公司 | Tray apparatus, column with same and method of assembling and using |
| CN101708377A (en) * | 2009-12-25 | 2010-05-19 | 南京大学 | Large-liquid holdup catalytic-reaction rectifying tower plate |
| CN103239883A (en) * | 2012-02-08 | 2013-08-14 | 中国石油天然气股份有限公司 | Method for designing multi-overflow tower plate by equal residence time method |
| CN207856351U (en) * | 2017-11-17 | 2018-09-14 | 洪湖市兴达石化设备制造有限公司 | Multipurpose descending liquid structure |
-
2017
- 2017-11-17 CN CN201711146274.1A patent/CN107854859B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045357A (en) * | 1989-03-08 | 1990-09-19 | 格里奇公司 | Downspout-tower tray assembly |
| CN1378872A (en) * | 2002-01-25 | 2002-11-13 | 蓝仁水 | Tower plate for gas baffling |
| CN1816386A (en) * | 2003-02-06 | 2006-08-09 | 聚尔策化学技术有限公司 | Tray apparatus, column with same and method of assembling and using |
| CN101708377A (en) * | 2009-12-25 | 2010-05-19 | 南京大学 | Large-liquid holdup catalytic-reaction rectifying tower plate |
| CN103239883A (en) * | 2012-02-08 | 2013-08-14 | 中国石油天然气股份有限公司 | Method for designing multi-overflow tower plate by equal residence time method |
| CN207856351U (en) * | 2017-11-17 | 2018-09-14 | 洪湖市兴达石化设备制造有限公司 | Multipurpose descending liquid structure |
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| CN107854859A (en) | 2018-03-30 |
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