CN112245956A - Filler rectifying tower with concave-convex wall surface structure and using method thereof - Google Patents
Filler rectifying tower with concave-convex wall surface structure and using method thereof Download PDFInfo
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- CN112245956A CN112245956A CN202011238695.9A CN202011238695A CN112245956A CN 112245956 A CN112245956 A CN 112245956A CN 202011238695 A CN202011238695 A CN 202011238695A CN 112245956 A CN112245956 A CN 112245956A
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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
- B01D3/42—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a concave-convex wall surface structure filler rectifying tower and a using method thereof, and the rectifying tower comprises: the tower body comprises a tower top, a rectifying section, a stripping section and a tower kettle from top to bottom in sequence; the fillers are arranged in the rectifying section and the stripping section; the tower body is provided with a filler, and the wall surface provided with the filler on the tower body is provided with a concave-convex wall surface; the liquid distributor is arranged in the tower top and is arranged above the packing of the rectifying section; the raw material liquid inlet pipe is arranged on the tower wall above the packing of the stripping section; 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 distributor is connected with the condenser; the condenser is connected with a product outlet pipe; a gas inlet tower branch pipe arranged on the tower kettle; the reboiler is communicated with the gas inlet tower branch pipe through a pipeline; the liquid outlet pipe is arranged on the tower kettle and is connected with the reboiler through a pipeline, so that the wall effect of the packed tower is overcome, the gas-liquid mass transfer effect is better, and the utilization rate of the packed bed layer is improved.
Description
Technical Field
The invention belongs to the technical field of chemical equipment, and particularly relates to a filler rectifying tower with a concave-convex wall surface structure and a using method thereof.
Background
According to related data, the petrochemical industry has high energy consumption in total domestic industrial energy consumption, the petrochemical industry has a share of about 15%, wherein the petrochemical industry mainly comes from a separation link, and the energy consumption of the link accounts for about 40% -70% of the overall energy consumption. However, the fraction of rectification unit operation in the separation energy consumption is the largest, which accounts for about 95%. It is clearly pointed out from the thirteen-five development plans of the country that the industrial development further refines the energy-saving emission-reduction index and is carried out by enterprises. Therefore, under the current large background of energy conservation and emission reduction, the link of the rectification process needs to be optimized and improved.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the existing energy-saving technology of the rectifying tower mainly comprises the following three methods: firstly, optimizing a rectification process by adopting a heat pump or a multi-effect rectification technology and the like; improving and optimizing distillation operation parameters such as reflux ratio, feeding heat condition and the like; and thirdly, improving the structure of the rectifying tower, optimizing the structure and materials of the filler and the like.
The packed tower is a continuous gas-liquid rectification separation device, a tower body structure is a smooth cylindrical wall surface structure generally, the porosity between the packing and the wall surface is large, so that the fluid resistance at the wall surface of the packed tower is small, a flow passage is large relative to the inside of a packed bed layer, and fluid tends to be enriched at the wall surface of the packed tower when flowing in the packed bed layer, so that the utilization rate of the packed bed layer is reduced. In order to weaken the wall effect of the packed tower, a method of arranging liquid distributors in sections is mostly adopted, so that liquid enriched on the wall can be uniformly distributed again, and the purpose of increasing the effective contact area of a packed bed layer is achieved. However, the packing bed layer of the method usually needs to be arranged in multiple sections, and more packing press plates, packing support plates, liquid distributors and the like need to be installed, so that the defects of complex structure, large volume, heavy weight, complex maintenance and the like of the packed tower are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a filler rectifying tower with a concave-convex wall surface structure and a using method thereof, wherein the wall surface effect of the filler rectifying tower is overcome, the gas-liquid mass transfer effect is better, the utilization rate of a filler bed layer is improved, the contact area is larger, the contact time is longer, and the rectifying and separating efficiency is greatly improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a packed rectifying column having a concave-convex wall surface structure is provided with:
the tower body comprises a tower top, a rectifying section, a stripping section and a tower kettle from top to bottom in sequence;
the rectifying section and the stripping section are internally provided with fillers;
the tower body is provided with a filler, and the wall surface provided with the filler on the tower body is provided with a concave-convex wall surface;
a liquid distributor disposed within the column top, the liquid distributor disposed above the packing of the rectification section;
the raw material liquid inlet pipe is arranged on the tower wall above the packing of the stripping section;
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 distributor is connected with the condenser; the condenser is connected with a product outlet pipe;
the gas inlet tower branch pipe is arranged on the tower kettle;
a reboiler which is communicated with the gas inlet tower branch pipe through a pipeline;
and the liquid outlet pipe is arranged on the tower kettle and is connected with the reboiler through a pipeline.
And a filler supporting plate is arranged on the inner wall of the tower body, and the filler is arranged on the filler supporting plate.
And a packing pressing plate is further arranged on the inner wall of the tower body and tightly presses the packing.
And an observation hole is arranged on the tower wall between the packing of the rectifying section and the packing of the stripping section.
And a demister is also arranged at the top of the tower.
Said gas outlet pipe is located at the top of said column top; the liquid outlet pipe is positioned at the bottom of the tower kettle.
The method for using the packed rectifying tower with the concave-convex wall surface structure comprises the steps that reflux liquid at the top of the tower is divided by the liquid distributor, the divided liquid flows along gaps of a packed bed layer, heat exchange and mass transfer between cold fluid and hot fluid are achieved on the surface of a packing, and the rectifying action is completed.
One of the technical schemes has the advantages or beneficial effects that the wall surface structure of the packed rectifying tower is improved, and the wall surface effect of the packed tower is overcome by combining the flowing characteristic of fluid in the packed bed layer, so that the gas-liquid mass transfer effect is better, the utilization rate of the packed bed layer is improved, the contact area is larger, the contact time is longer, and the rectifying and separating efficiency is greatly improved; simple structure, it is convenient to maintain and install, has practiced thrift equipment cost and cost of maintenance by a wide margin.
Drawings
FIG. 1 is a schematic structural diagram of a packed rectifying column with a concave-convex wall structure provided in an embodiment of the present invention;
the labels in the above figures are: 1. the tower comprises a tower top, 2, a rectifying section packing bed layer, 3, an observation hole, 4, a stripping section packing bed layer, 5, a tower kettle, 6, a concave-convex wall surface, 7, a packing support plate, 8, a reboiler gas inlet tower pipe, 9, a reboiler, 10, a liquid outlet pipe, 11, a packing press plate, 12, a raw material liquid inlet pipe, 13, a liquid distributor, 14, a demister, 15, a gas outlet pipe, 16, a condenser, 17 and a reflux liquid inlet 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 packed rectifying tower with a concave-convex wall surface structure. The inner surface of the tower body is composed of a concave-convex structure, and a liquid distributor is not required to be installed in the tower body. The structure includes: the device comprises a packing bed layer, a liquid distributor, a demister, a tower top gas outlet pipe, a condenser, a tower top reflux inlet pipe, a tower kettle liquid outlet pipeline, a reboiler gas inlet pipe, a raw material liquid inlet pipe, a packing pressing plate, a packing supporting plate and an observation hole. The gas outlet pipeline at the top of the tower is connected with a condenser, condensate in the condenser enters the top of the tower through a liquid reflux pipeline, 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 through a tower kettle gas inlet pipeline. Raw material liquid in the rectification process enters the tower from a raw material inlet pipe in the middle of the tower body, and the distribution condition of descending fluid in the rectification section in the tower can be observed through the observation holes.
The wall surface of the packed bed layer in the packed rectifying tower is of a concave-convex structure, the wall surface of the concave-convex structure is made of an anticorrosive and wear-resistant metal material, and the wall surfaces at other positions are flat cylindrical wall surfaces. The column is packed with conventional packing required for rectification operation, and no liquid re-distributor is required to be installed inside the column, compared with the conventional packed column.
The top of the packing tower is provided with a demister 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 structure of the packing bed layer is that the packing bed layer is fixed by a packing pressing plate (upper part) and a packing supporting plate (lower part).
The packing bed layer in the packing rectification tower does not need to be arranged at equal height, and the actual height is properly adjusted according to the specific process requirements.
The working principle of the plate-type packing rectifying tower is as follows: the tower top reflux liquid of the packing rectifying tower with the concave-convex wall surface structure is uniformly distributed by the tower top liquid distributor, the distributed liquid flows along gaps of the packing bed layer, and the heat exchange and mass transfer between cold and hot fluids are realized on the surface of the packing to finish the rectifying operation. The tower body wall surface of the packed tower adopts a concave-convex wall surface structure, so that the wall surface effect of the packed tower is weakened, and after liquid flows through the packing bed layer, the phenomenon of obvious liquid flow enrichment at the inner wall surface of the tower body can not occur, so that the utilization rate of the packing bed layer is improved, and the separation efficiency of the rectifying tower is further improved.
Through reforming the tower body wall surface structure of the packed rectifying tower, the wall surface effect in the packed tower is inhibited, the packing surface utilization rate of the packing bed layer is improved, the gas-liquid contact chance and the mass transfer efficiency in the packing are further enhanced, and the production efficiency of the packed rectifying tower is improved.
The gas outlet pipe at the top of the tower is connected with a condenser, the condensate in the condenser is connected to the top of the rectifying tower through a liquid reflux pipe, enters the tower through a liquid distributor at the top of the tower, and then flows to the tower kettle through the packing layers of the rectifying section and the stripping section in sequence. . The liquid outlet pipe at the bottom of the tower kettle is connected to a reboiler, the kettle liquid is vaporized after being heated by the reboiler, the obtained gas enters the tower tube through the reboiler and is connected to the tower kettle, and the ascending gas sequentially passes through packing layers of the stripping section and the rectifying section and then is discharged out of the tower through a gas outlet pipe at the top of the tower through a demister.
Liquid distributors are arranged at the top of the tower and the feed inlet so as to achieve the best liquid distribution effect and better rectification separation efficiency. The distribution effect of the liquid in the packing bed layer of the rectification section can be observed through the observation hole.
The tower top and the tower bottom are in butt joint with the tower body through flange structures, so that the filler in the tower can be conveniently replaced and maintained. The filling mode of the filler adopts wet filling, and when the filling of the filler is finished, the filler bed layer in the tower needs to be subjected to airflow drying treatment. Before the filler bed layer is dried, a filler pressing plate is needed to press and fix the filler bed layer.
The working principle of the concave-convex wall surface structure packing rectifying tower is as follows: the tower top reflux liquid is uniformly distributed by the tower top reflux liquid distributor, the distributed liquid flows along the gap of the filler bed layer, the heat exchange and mass transfer between cold and hot fluids are realized on the surface of the filler, and the rectification operation is completed. Because the tower body wall surface of the packed tower adopts the concave-convex wall surface structure, the porosity at the wall surface of the packed tower is reduced, so that liquid cannot be enriched on the tower body wall surface after flowing through the packing bed layer, and the utilization rate of the packing bed layer is finally improved.
After the structure is adopted, the porosity of the filler bed layer at the tower body wall surface is reduced by modifying the tower body wall surface structure of the filler type rectifying tower, so that the flow resistance of fluid at the tower body wall surface is increased, the wall surface effect in the filler type rectifying tower is inhibited, the utilization rate of the surface area inside the filler bed layer is improved, the gas-liquid contact chance in filler is strengthened, the mass transfer efficiency is improved, and the production efficiency of the filler type rectifying tower is finally greatly improved.
The invention has been described above with reference to the accompanying drawings, 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 apply the inventive concept and solution to other applications without substantial modification.
Claims (8)
1. A packed rectifying column having a concave-convex wall surface structure is characterized by comprising:
the tower body comprises a tower top, a rectifying section, a stripping section and a tower kettle from top to bottom in sequence;
the rectifying section and the stripping section are internally provided with fillers;
the tower body is provided with a filler, and the wall surface provided with the filler on the tower body is provided with a concave-convex wall surface;
a liquid distributor disposed within the column top, the liquid distributor disposed above the packing of the rectification section;
the raw material liquid inlet pipe is arranged on the tower wall above the packing of the stripping section;
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 distributor is connected with the condenser; the condenser is connected with a product outlet pipe;
the gas inlet tower branch pipe is arranged on the tower kettle;
a reboiler which is communicated with the gas inlet tower branch pipe through a pipeline;
and the liquid outlet pipe is arranged on the tower kettle and is connected with the reboiler through a pipeline.
2. The corrugated wall structure packed rectification column of claim 1, wherein a packing support plate is disposed on the inner wall of the column body, and the packing is mounted on the packing support plate.
3. The packed rectification column with a concave-convex wall surface structure as claimed in claim 2, wherein a packing pressing plate is further arranged on the inner wall of the column body, and the packing pressing plate presses the packing.
4. The corrugated wall structured packing rectification column as claimed in claim 3, wherein an observation hole is provided in the column wall between the packing of the rectification section and the packing of the stripping section.
5. The corrugated wall structured packing rectification column as claimed in claim 4, wherein a demister is further provided on the top of the column.
6. The corrugated wall structured packing rectification column of claim 5 wherein the packing is provided with a foaming agent.
7. The corrugated wall structured packed rectification column of claim 6 wherein said gas outlet pipe is located at the top of said column top; the liquid outlet pipe is positioned at the bottom of the tower kettle.
8. A use method of the packing rectification column with the concave-convex wall surface structure according to any one of claims 1 to 7, characterized in that reflux liquid at the top of the column is divided by a liquid distributor, the divided liquid flows along gaps of a packing bed layer, and heat exchange and mass transfer between cold fluid and hot fluid are realized on the surface of the packing to finish rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238695.9A CN112245956A (en) | 2020-11-09 | 2020-11-09 | Filler rectifying tower with concave-convex wall surface structure and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238695.9A CN112245956A (en) | 2020-11-09 | 2020-11-09 | Filler rectifying tower with concave-convex wall surface structure and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112245956A true CN112245956A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238695.9A Pending CN112245956A (en) | 2020-11-09 | 2020-11-09 | Filler rectifying tower with concave-convex wall surface structure and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082752A (en) * | 2021-04-09 | 2021-07-09 | 云南国润香料制造有限公司 | Sectional type filler rectification device capable of improving eucalyptol extraction efficiency and control system |
-
2020
- 2020-11-09 CN CN202011238695.9A patent/CN112245956A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082752A (en) * | 2021-04-09 | 2021-07-09 | 云南国润香料制造有限公司 | Sectional type filler rectification device capable of improving eucalyptol extraction efficiency and control system |
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