CN212731103U - Anti-coking perforation rectification reboiling device - Google Patents
Anti-coking perforation rectification reboiling device Download PDFInfo
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- CN212731103U CN212731103U CN202020924927.5U CN202020924927U CN212731103U CN 212731103 U CN212731103 U CN 212731103U CN 202020924927 U CN202020924927 U CN 202020924927U CN 212731103 U CN212731103 U CN 212731103U
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- reboiler
- coking
- rectifying tower
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Abstract
The utility model relates to an anti-coking perforation rectification reboiling device, belonging to the technical field of rubber synthesis; the problems of tube array coking and corrosion perforation of a reboiler used in cooperation with a reduced-pressure rectifying tower are solved; the technical scheme is as follows: the bottom of the reduced pressure rectifying tower is connected with the bottom of a reboiler through a reboiler low circulating pipe, the reboiler is of a vertical structure, a plurality of tubes are arranged in the reboiler, the uppermost ends of the tubes are lower than the liquid level in the kettle of the reduced pressure rectifying tower, and the top of the reboiler is connected with the reduced pressure rectifying tower through a high circulating pipe; this device makes reboiler tubulation thermally equivalent, not only effectively increases heat transfer area, can prolong reboiler life moreover, reduces the intraductal coking or the perforated condition of corruption that causes because of being heated inequality in the reboiler.
Description
Technical Field
The utility model belongs to the technical field of rubber synthesis, specifically be an anti-coking perforation rectification reboiling device.
Background
The production process of the synthetic rubber comprises monomer synthesis and refining, a polymerization process and a rubber post-treatment process, wherein in the process of rectifying chloroprene liquid containing dichlorobutene, refined chloroprene gas discharged from a reduced pressure rectifying tower is discharged from the top of the tower, passes through a full condenser and a tail condenser to form liquid, and then enters a drying system for treatment, and part of materials at the bottom of the tower enters a second reduced pressure rectifying tower through a pipeline. The other part enters the reboiler through a low circulation pipe, and the apparatus is heated by a steam jacket to vaporize the material through a high circulation pipe into the column.
In the production process of the chloroprene monomer, the intermediate crude CD from the synthesis system contains CD, MVA, chloroprene rubber (DCB) and other components, and the content of the intermediate crude CD is respectively CD34%, MVA62% and DCB 4%. The boiling points of these three substances in the standard state are MVA: 5.9 ℃, CD: 59.4 ℃ and DCB 129 ℃. The first step is therefore to separate the low-boiling MVA. This is accomplished by a vacuum distillation column. The first vacuum rectification tower is provided with a reboiler for heating and vaporizing materials. Because the CD and DCB with higher boiling point are in the bottom kettle, the CD is easy to polymerize, although the polymerization inhibitor is continuously added into the tower, the polymerization still occurs, and the continuous start cycle is only 15 days, and the CD needs to be switched off for cleaning. Especially in the reboiler tubes, polymer clogging is severe. In order to clean the formed polymer, the existing reboiler adopts an inclined type so as to conveniently discharge the polymer from the reboiler, but due to the inclined arrangement, a vapor-liquid interface in the reboiler is horizontal, so that the temperature of a tube array above the interface is high, and the tube array is easy to corrode, perforate and leak.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides an anti-coking perforation rectification reboiling device, solves the reboiler tubulation coking that uses with the cooperation of vacuum distillation tower and corrodes fenestrate problem.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
An anti-coking perforation rectification reboiling device comprises a vacuum rectification tower, a complete condenser and a tail condenser, wherein an exhaust port of the vacuum rectification tower is sequentially connected with the complete condenser and the tail condenser; the bottom of decompression rectifying column is connected with the bottom of reboiler through reboiler low circulating pipe, the reboiler is vertical structure, is provided with a plurality of tubulations in the reboiler, the top of a plurality of tubulations is less than the liquid level in the decompression rectifying column cauldron, the top of reboiler is connected with the decompression rectifying column through the high circulating pipe.
Further, the tubes are arranged in a horizontal axial direction.
Further, the reboiler low circulating pipe is connected with a second vacuum rectification tower through a branch pipe.
Further, the decompression rectifying tower is connected with a liquid level meter.
Further, the reboiler is provided with a steam coil, a steam inlet of the steam coil is arranged at the top of the reboiler, and a condensed water outlet of the steam coil is arranged at the bottom of the reboiler.
The utility model discloses produced beneficial effect does for prior art.
The utility model discloses with the vertical arrangement of reboiler, connect the bottom of vacuum distillation tower and reboiler through the pipeline, form the linker, through the liquid level of control vacuum distillation tower bottom cauldron, make the tubulation in the reboiler submerged by the liquid that gets into totally to make the gas-liquid interface all not cross the tubulation. The tubes of the reboiler are uniformly heated, so that the heat exchange area is effectively increased, and the service life of the reboiler can be prolonged. The condition of coking or corrosion perforation in the pipe caused by uneven heating in the reboiler is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the anti-coking perforation rectification reboiling device of the utility model.
Wherein, 1 is a reduced pressure rectifying tower, 2 is a complete condenser, 3 is a tail condenser, 4 is a reboiler low circulating pipe, 5 is a reboiler, 6 is a column pipe, 7 is a high circulating pipe, 8 is a branch pipe, 9 is a steam inlet, and 10 is a condensed water outlet.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in figure 1, the anti-coking perforation rectification reboiling device comprises a vacuum rectification tower 1, a complete condenser 2 and a tail condenser 3, wherein an exhaust port of the vacuum rectification tower 1 is sequentially connected with the complete condenser 2 and the tail condenser 3; discharging low-boiling-point MVA discharged from the top of a reduced-pressure rectifying tower 1 from the top of the tower, and allowing the low-boiling-point MVA to pass through a full condenser 2 and a tail condenser 3 to form liquid to enter an MVA buffer tank; the rest CD and DCB enter a reboiler 5 in the bottom kettle through a reboiler low circulating pipe 4 at the bottom of the vacuum rectification tower 1, and the other part enters a second vacuum rectification tower (not shown in the figure) through a branch pipe 8 connected with the reboiler low circulating pipe 4. The bottom of the reboiler 5 is connected with the bottom of the reduced pressure rectifying tower 1 through a reboiler low circulating pipe 4 to form a communicating vessel; the decompression rectifying tower 1 is connected with a liquid level meter. Reboiler 5 is vertical structure in this structure, installs a plurality of horizontal axial's tubulations 6 in reboiler 5, and the top of inside a plurality of tubulations 6 is less than the liquid level height in the 1 cauldron of vacuum distillation tower, and through the liquid level of controlling the 1 bottom cauldron of vacuum distillation tower, the tubulation 6 that makes in reboiler 5 is totally submerged by the liquid of entering to make the vapour liquid interface all not cross tubulation 6. The outside of the tube nest 6 is provided with a steam coil, CD and DCB enter the tube nest 6 and are heated and gasified by introduced steam, a steam inlet 9 of the steam coil is arranged at the top of the reboiler 5, and a condensed water outlet 10 of the steam coil is arranged at the bottom of the reboiler 5. The top of the reboiler 5 is connected to the vacuum distillation column 1 through a high-circulation pipe 7.
The reboiler 5 is vertically arranged, the bottoms of the reduced pressure distillation tower 1 and the reboiler 5 are connected through a pipeline to form a communicating vessel, and the liquid level of the bottom kettle of the reduced pressure distillation tower 1 is controlled to enable the tube nest in the reboiler 5 to be totally submerged by entering liquid so as to enable the vapor-liquid interface to totally submerge the tube nest 6. The tube nest 6 of the reboiler 5 is heated uniformly, so that the heat exchange area is effectively increased, and the service life of the reboiler can be prolonged. The condition of coking or corrosion perforation in the pipe caused by uneven heating in the reboiler is reduced.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (5)
1. An anti-coking perforation rectification reboiling device comprises a vacuum rectification tower (1), a complete condenser (2) and a tail condenser (3), wherein an exhaust port of the vacuum rectification tower (1) is sequentially connected with the complete condenser (2) and the tail condenser (3); the device is characterized in that the bottom of the reduced pressure rectifying tower (1) is connected with the bottom of a reboiler (5) through a reboiler low circulation pipe (4), the reboiler (5) is of a vertical structure, a plurality of tubes (6) are arranged in the reboiler (5), the uppermost ends of the tubes (6) are lower than the liquid level in a kettle of the reduced pressure rectifying tower (1), and the top of the reboiler (5) is connected with the reduced pressure rectifying tower (1) through a high circulation pipe (7).
2. An anti-coking perforated rectifying distillation reboiling apparatus according to claim 1, characterized in that the tubes (6) are arranged horizontally and axially.
3. An anti-coking perforated rectifying and reboiling device according to claim 1, characterized in that the reboiler low circulation pipe (4) is connected with a second vacuum rectifying tower through a branch pipe (8).
4. Anti-coking perforated rectifying and reboiling device according to claim 1, characterized in that said vacuum rectifying tower (1) is connected with a level gauge.
5. Anti-coking perforated rectifying and reboiling apparatus according to claim 1, characterized in that the reboiler (5) is provided with a steam coil, the steam inlet (9) of which is arranged at the top of the reboiler (5) and the condensed water outlet (10) of which is arranged at the bottom of the reboiler (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020924927.5U CN212731103U (en) | 2020-05-28 | 2020-05-28 | Anti-coking perforation rectification reboiling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020924927.5U CN212731103U (en) | 2020-05-28 | 2020-05-28 | Anti-coking perforation rectification reboiling device |
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| CN212731103U true CN212731103U (en) | 2021-03-19 |
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| CN202020924927.5U Active CN212731103U (en) | 2020-05-28 | 2020-05-28 | Anti-coking perforation rectification reboiling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113559544A (en) * | 2021-07-26 | 2021-10-29 | 中国工程物理研究院核物理与化学研究所 | Hydrogen isotope low-temperature rectification low-retention reboiler |
-
2020
- 2020-05-28 CN CN202020924927.5U patent/CN212731103U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113559544A (en) * | 2021-07-26 | 2021-10-29 | 中国工程物理研究院核物理与化学研究所 | Hydrogen isotope low-temperature rectification low-retention reboiler |
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