CN112274960A - Foam type rectifying tower and using method thereof - Google Patents
Foam type rectifying tower and using method thereof Download PDFInfo
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- CN112274960A CN112274960A CN202011238018.7A CN202011238018A CN112274960A CN 112274960 A CN112274960 A CN 112274960A CN 202011238018 A CN202011238018 A CN 202011238018A CN 112274960 A CN112274960 A CN 112274960A
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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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Abstract
The invention discloses a foam type rectifying tower and a using method thereof, and the foam type rectifying tower comprises the following components: the tower body comprises a tower top, a rectifying section and a stripping section from top to bottom in sequence; the wire mesh packing layers are arranged on the tower top, the rectifying section and the stripping section; the liquid distributors are respectively arranged in the tower top, the rectifying section and the stripping section and are arranged above the wire mesh packing layer; a liquid distributor in the stripping section is connected with a raw material inlet pipe; a gas outlet pipe disposed on the top of the column; the condenser is connected with the gas outlet pipe through a pipeline; the liquid distributors in the tower top and the rectifying section are connected with the condenser through management; the condenser is connected with a product outlet pipe; the gas inlet tower branch pipe is arranged on the tower body; the reboiler is communicated with the gas inlet tower branch pipe through a pipeline; and the liquid outlet pipe is arranged on the stripping section and is connected with the reboiler through a pipeline, and a gas-liquid heat transfer and mass transfer interface is enhanced and improved through a foaming method so as to provide help for energy conservation and consumption reduction of the rectification process.
Description
Technical Field
The invention belongs to the technical field of chemical equipment, and particularly relates to a foam type rectifying tower and a using method thereof.
Background
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the existing rectifying tower is divided into an extraction rectifying tower, a reaction rectifying tower, a constant boiling rectifying tower, an atmospheric rectifying tower, a pressurized rectifying tower, a reduced pressure rectifying tower, azeotropic rectification, heat pump rectification, molecular rectification, centrifugal rectification and the like according to different operation processes. Statistics show that about 15% of total domestic industrial energy consumption comes from petrochemical industry, while the energy consumption in the field mainly comes from separation links, wherein the fraction of distillation unit operation is the largest (about 95%).
The energy-saving technology of the existing rectifying tower mainly comprises the following steps: improving and optimizing distillation operation parameters, such as: reflux ratio, feed heat conditions, etc.; simplifying and improving the structure of the rectifying tower, optimizing the structure and materials of the filler and the like; and thirdly, a new technology, such as a heat pump or a multi-effect rectification technology, is adopted in the rectification technology.
Disclosure of Invention
The invention aims to provide a foam type rectifying tower which strengthens and improves a gas-liquid heat transfer and mass transfer interface through a foam method so as to provide help for energy conservation and consumption reduction of a rectifying process and a using method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a froth rectification column having:
the tower body comprises a tower top, a rectifying section and a stripping section from top to bottom in sequence;
the top of the tower, the rectifying section and the stripping section are all provided with the wire mesh packing layers;
the liquid distributor is respectively arranged in the tower top, the rectifying section and the stripping section and is arranged above the wire mesh packing layer; the liquid distributor in the stripping section is connected with the raw material inlet pipe;
a gas outlet pipe disposed on the top of the column;
the condenser is connected with the gas outlet pipe through a pipeline; the liquid distributors in the tower top and the rectifying section are connected with the condenser through management; the condenser is connected with a product outlet pipe;
the gas inlet tower branch pipe is arranged on the tower body;
a reboiler which is communicated with the gas inlet tower branch pipe through a pipeline;
and the liquid outlet pipe is arranged on the stripping section and is connected with the reboiler through a pipeline.
The wire mesh packing layer is a metal wire mesh packing, and the wire mesh packing layer is of a multilayer wire mesh structure.
And a foaming agent is arranged on the silk screen packing layer.
And a demister is also arranged at the top of the tower.
And observation holes are formed in the tower top, the rectifying section and the stripping section.
And the two gas tower inlet branch pipes are respectively arranged below the wire mesh packing layers of the rectifying section and the stripping section.
Said gas outlet pipe is located at the top of said column top; the liquid outlet pipe is located at the bottom of the stripping section.
A gas material in the rectifying tower is condensed and refluxed by a condenser, flows into the tower from a branch pipe of a reflux liquid inlet at the top of the tower, passes through a liquid distributor and is sprayed on a wire mesh packing, rising steam generated by a reboiler enters the rectifying tower from a branch pipe of the gas inlet tower and forms foam with a liquid film on the wire mesh packing layer, a foam liquid phase interface film provides a heat transfer and mass transfer interface for gas and liquid phases, the formed foam is broken after passing through an upper demister, and the released gas is discharged from a gas outlet pipe at the top of the tower and then enters a condenser at the top of the tower.
One of the technical schemes has the following advantages or beneficial effects that the gas-liquid heat transfer and mass transfer interface is strengthened and improved by a foaming method so as to provide help for energy conservation and consumption reduction of the rectification process.
Drawings
FIG. 1 is a schematic structural diagram of a bubble column provided in an embodiment of the present invention;
the labels in the above figures are: 1. the device comprises a rectifying section, 2, a stripping section, 3, a tower top, 4, a wire mesh packing layer, 5, a raw material liquid inlet pipe, 6, an observation hole, 7, a liquid distributor, 8, a demister, 9, a gas outlet pipe, 10, a condenser, 11, a reflux liquid inlet branch pipe, 12, a gas inlet branch pipe, 13, a reboiler, 14 and a liquid outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a foam rectifying tower, wherein the packing structure in the tower is a wire mesh packing which provides an opportunity for forming foam, and a demister is arranged at the upper layer of the wire mesh packing so as to break the formed foam and reduce the flow resistance in the tower, in order to facilitate the foam to be broken. The foam type rectifying tower structure comprises a tower top gas outlet pipe, a demister, a liquid distributor, a condenser, a tower top reflux inlet pipe, a wire mesh filler, a raw material liquid inlet pipe, a tower kettle liquid outlet pipe, a reboiler gas inlet tower pipeline and an observation hole. The tower top gas outlet pipe is connected with a condenser, condensed liquid in the condenser enters the tower through a liquid return pipe branch circuit, a bottom kettle liquid outlet pipe of the tower kettle is connected with a reboiler, and gas coming out from the reboiler enters the tower from a tower kettle gas inlet pipe branch circuit. Raw material liquid in the rectification process enters the tower from a raw material inlet pipe in the middle of the tower body, an observation hole is arranged above the raw material liquid, and whether foam accumulation exists above the demister can be observed, so that the foam stability in the rectification tower can be observed.
The gas outlet pipe at the top of the tower is connected with a condenser, condensate in the condenser is connected into a rectifying tower through a liquid return pipe, the condensate is sprayed on the upper part of a silk screen-shaped packing layer through a liquid distributor in the tower, rising steam at the bottom of the tower forms foam, the gas-liquid heat transfer and mass transfer process in the rectifying operation is completed, the foam is broken after passing through a demister, broken liquid films flow into a rectifying tower stripping section from the demister, enter the bottom of a tower kettle of the rectifying tower, then enter a reboiler through a liquid outlet pipe at the bottom of the tower kettle, kettle liquid is heated and then vaporized through the reboiler, obtained gas enters the tower through a gas inlet pipe of the reboiler and enters the tower, and rising gas sequentially passes through the packing layers of the stripping section and the rectifying section and then exits the tower through a gas outlet pipe at the top.
The wire mesh-shaped filler in the foam type rectifying tower is composed of a plurality of layers of metal gauze, the surface of the wire mesh-shaped filler can be of a concave-convex wavy corrugated structure, and can also be of a flat surface structure, and the wire mesh-shaped filler needs to have better anti-corrosion and high-temperature strain resistance.
In the tower, foam eliminators are arranged above the wire mesh packing layers so as to achieve the best foam breaking effect, thereby further reducing the flow resistance in the tower and creating conditions for improving the rectification separation efficiency. The breaking effect of the foam in the wire mesh-shaped packing bed layer can be observed through the observation hole. The foam type rectifying tower is internally provided with a foam remover which is fixed on a bracket on the inner surface of the tower body by bolts and is made of anticorrosive and wear-resistant metal materials.
The tower top and the tower kettle are in butt joint with the tower body through flange structures, so that the wire mesh-shaped filler in the tower can be conveniently replaced and maintained. The filling mode of the filler adopts dry method assembly. During installation, the fixed position of the liquid distributor above the silk screen filler is required to be noticed, and the silk screen filler is required to be installed from top to bottom in sequence.
The silk screen-shaped packing bed layer structure of the foam rectifying tower does not need a packing pressing plate (upper) and a packing supporting plate (lower), and only the silk screen structure is fixed on the wall surface of the tower.
The multilayer wire mesh packing bed layer in the foam rectifying tower is not suitable for being too high so as to prevent the generation of adverse factors such as increased flow resistance, excessive foam accumulation and the like, and the actual height can be properly adjusted according to specific process requirements.
The working principle of the foam rectifying tower is as follows: the liquid material in the rectifying tower flows into the tower from the branch pipeline at the top of the tower by the reflux liquid in the condenser, the reflux liquid is sprayed on the wire mesh packing after passing through the liquid distributor, the rising steam generated by the reboiler enters the rectifying tower from the branch pipeline at the bottom and forms foam with the liquid film on the wire mesh, the foam liquid phase interface film provides a large amount of heat transfer and mass transfer interfaces for gas-liquid two phases, the formed foam is broken after passing through the upper foam remover, and the released gas is discharged from the gas outlet pipe at the top of the tower and then enters the condenser at the top of the tower, and part of the released gas is recovered as a product.
After the scheme is adopted, the structure of the conventional packing type rectifying tower is improved, a large amount of foam interfaces are formed by gas-liquid two phases by virtue of the wire mesh packing and the foaming agent, and the defects of large resistance, low circulation, large weight of the tower body and the like of the conventional packing tower are overcome. The gas-liquid interface film of the foam can provide a place for gas-liquid heat transfer and mass transfer for rectification operation without a large amount of solid packing surfaces, so that the mass of the packed tower and the fluid flow resistance are greatly reduced. In addition, foam is rapidly crushed through the demister, fluid flux in the tower can be increased, space of the packed tower is saved, and rectification separation efficiency is greatly improved. The space utilization rate of the packed tower is improved, the gas-liquid contact area is larger, and the contact time is longer, so that the rectification separation efficiency is greatly improved; in addition, the device has simple structure (no need of a packing pressing plate and a packing supporting plate), small weight of tower equipment, convenient maintenance and silk screen installation, and greatly saves the manufacturing cost and the production maintenance cost of the device.
The invention has been described above with reference to the accompanying drawings, and it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (8)
1. A bubble column, comprising:
the tower body comprises a tower top, a rectifying section and a stripping section from top to bottom in sequence;
the top of the tower, the rectifying section and the stripping section are all provided with the wire mesh packing layers;
the liquid distributor is respectively arranged in the tower top, the rectifying section and the stripping section and is arranged above the wire mesh packing layer; the liquid distributor in the stripping section is connected with the raw material inlet pipe;
a gas outlet pipe disposed on the top of the column;
the condenser is connected with the gas outlet pipe through a pipeline; the liquid distributors in the tower top and the rectifying section are connected with the condenser through management; the condenser is connected with a product outlet pipe;
the gas inlet tower branch pipe is arranged on the tower body;
a reboiler which is communicated with the gas inlet tower branch pipe through a pipeline;
and the liquid outlet pipe is arranged on the stripping section and is connected with the reboiler through a pipeline.
2. The foam rectifying tower of claim 1, wherein the wire mesh packing layer is a metal wire mesh packing, and the wire mesh packing layer is a multi-layer mesh structure.
3. The foam-type rectification column as claimed in claim 2, wherein a foaming agent is provided on the wire mesh packing layer.
4. The froth rectifier column of claim 3 further comprising a demister positioned overhead.
5. The froth rectification column of claim 4 wherein the top, the rectification section and the stripping section have sight holes.
6. The foam rectifying column according to claim 5, wherein the number of the gas inlet branch pipes is two, and the gas inlet branch pipes are respectively disposed below the wire mesh packing layers of the rectifying section and the stripping section.
7. The froth rectifier column of claim 6 wherein the gas outlet pipe is located at the top of the column top; the liquid outlet pipe is located at the bottom of the stripping section.
8. A method for using the foam rectifying tower as defined in claims 4-7, wherein the gas material in the rectifying tower is condensed and refluxed from the condenser, and flows into the tower from the reflux liquid inlet branch pipe at the top of the tower, and is sprayed on the wire mesh packing material after passing through the liquid distributor, the rising vapor generated by the reboiler enters the rectifying tower from the gas inlet branch pipe, and forms foam with the liquid film on the wire mesh packing material, the foam liquid phase interface film provides a heat and mass transfer interface for the gas-liquid two-phase, the formed foam is broken after passing through the upper demister, and the released gas is discharged from the gas outlet pipe at the top of the tower and then enters the condenser at the top of the tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238018.7A CN112274960A (en) | 2020-11-09 | 2020-11-09 | Foam type rectifying tower and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238018.7A CN112274960A (en) | 2020-11-09 | 2020-11-09 | Foam type rectifying tower and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112274960A true CN112274960A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238018.7A Pending CN112274960A (en) | 2020-11-09 | 2020-11-09 | Foam type rectifying tower and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100173A (en) * | 2021-11-03 | 2022-03-01 | 何金翠 | Light component removal rectifying tower |
| CN114392576A (en) * | 2021-12-25 | 2022-04-26 | 江苏源拓环境科技有限公司 | Horizontal pipe falling film type rectifying device |
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| US4135268A (en) * | 1976-12-14 | 1979-01-23 | Hoechst Aktiengesellschaft | Process for the uniform dyeing of textile wound packages or packaged material |
| CN2095028U (en) * | 1991-05-18 | 1992-02-05 | 浙江工学院 | Composite tower |
| US20080019882A1 (en) * | 2004-08-25 | 2008-01-24 | Andreas Christel | Production Of A High-Molecular Polycondensate |
| CN201889094U (en) * | 2010-12-08 | 2011-07-06 | 湖北江钻天祥化工有限公司 | Wire mesh packing rectifying tower |
| CN202892952U (en) * | 2012-10-18 | 2013-04-24 | 上海正帆科技有限公司 | Device for purifying ammonia gas by rectification |
| CN204973117U (en) * | 2015-08-03 | 2016-01-20 | 青州联华化工有限公司 | Despumating rectifying tower |
| CN206167967U (en) * | 2016-11-08 | 2017-05-17 | 赵爱娟 | Be provided with liquid trap, liquid distributor and cooling structure's rectifying column |
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2020
- 2020-11-09 CN CN202011238018.7A patent/CN112274960A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4135268A (en) * | 1976-12-14 | 1979-01-23 | Hoechst Aktiengesellschaft | Process for the uniform dyeing of textile wound packages or packaged material |
| CN2095028U (en) * | 1991-05-18 | 1992-02-05 | 浙江工学院 | Composite tower |
| US20080019882A1 (en) * | 2004-08-25 | 2008-01-24 | Andreas Christel | Production Of A High-Molecular Polycondensate |
| CN201889094U (en) * | 2010-12-08 | 2011-07-06 | 湖北江钻天祥化工有限公司 | Wire mesh packing rectifying tower |
| CN202892952U (en) * | 2012-10-18 | 2013-04-24 | 上海正帆科技有限公司 | Device for purifying ammonia gas by rectification |
| CN204973117U (en) * | 2015-08-03 | 2016-01-20 | 青州联华化工有限公司 | Despumating rectifying tower |
| CN206167967U (en) * | 2016-11-08 | 2017-05-17 | 赵爱娟 | Be provided with liquid trap, liquid distributor and cooling structure's rectifying column |
Non-Patent Citations (2)
| Title |
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| 刘乃鸿: "《工业塔新型规整填料应用手册》", 31 December 1993 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100173A (en) * | 2021-11-03 | 2022-03-01 | 何金翠 | Light component removal rectifying tower |
| CN114392576A (en) * | 2021-12-25 | 2022-04-26 | 江苏源拓环境科技有限公司 | Horizontal pipe falling film type rectifying device |
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