CN212914581U - Plate filling and mixing type rectifying tower - Google Patents
Plate filling and mixing type rectifying tower Download PDFInfo
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- CN212914581U CN212914581U CN201921661701.4U CN201921661701U CN212914581U CN 212914581 U CN212914581 U CN 212914581U CN 201921661701 U CN201921661701 U CN 201921661701U CN 212914581 U CN212914581 U CN 212914581U
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Abstract
The utility model discloses a mixed type rectifying column is filled to board, the side of top of the tower (4) is equipped with backward flow mouth (5), a plurality of filler district I (6) and a plurality of liquid collection redistributor I (7) are distributed and communicated with each other according to upper and lower interval, each filler district I (6) is equipped with gas-liquid distributor I (8), column plate component (11) is equipped in column plate shell (10) of distillation section (2), the upper portion of inlet pipe (9) is communicated with liquid collection redistributor I (7) at the lower portion of rectifying section (1), the lower portion of inlet pipe (9) is communicated with the interior of column plate shell (10), a plurality of packing areas II (12) and a plurality of liquid collecting redistributors II (13) are distributed at the lower part of the tower plate shell (10), a gas-liquid distributor II (17) is arranged in each packing area II (12), and the lower part of the liquid collecting redistributor II (13) at the lower part of the distillation section (2) is connected with a cylinder (3). The utility model discloses can reach the effect of rectification steady operation.
Description
Technical Field
The utility model relates to a mixed formula rectifying column is filled to board.
Background
Tetrafluoroethylene (TFE for short), molecular formula CF2= CF2, is one of the basic raw materials of the organic fluorine industry, and is a monomer for manufacturing polytetrafluoroethylene and other fluoroplastics, fluororubbers and perfluoropropene.
The tetrafluoroethylene purification adopts a three-tower pressurization rectification method to purify the tetrafluoroethylene. Namely, tetrafluoroethylene coming out of a cracking furnace is subjected to deacidification, dehydration and deoxidation pretreatment and then sequentially enters three towers for rectification, wherein one tower is a rough separation tower and is used for removing cracking raw materials and heavy components, a second tower is a light component removal tower and is used for removing light components in the tetrafluoroethylene, and a third tower is a rectification tower and is used for separating high-boiling impurities in the tetrafluoroethylene, so that the tetrafluoroethylene with the purity of over 99.999 can be basically obtained.
In the above-mentioned background art, trace amounts of water, oxygen and acid are still brought in by the pretreatment, and although oxygen is removed from a polymerization inhibitor tank at the top of a column, the water and acid generate H + in a stripping section, and rust (ferric oxide) existing in the column forms ferric iron ions which oxidize tetrafluoroethylene to epoxy tetrafluoroethylene under acidic conditions, and the epoxy tetrafluoroethylene undergoes self-polymerization to generate PTFE and water when encountering H +. Because the concentration of tetrafluoroethylene in the stripping section is reduced downwards, but the concentration of the monomer in the stripping section below the feed inlet is still higher, the self-polymerization can be generated to block the packing, and the stable operation of the tower is influenced.
Disclosure of Invention
The utility model provides a mixed formula rectifying column is filled to board, it can reach the effect of rectification steady operation.
The utility model adopts the following technical scheme: the plate-packed mixed type rectifying tower is sequentially provided with a rectifying section, a stripping section and a barrel from top to bottom, the upper part of the rectifying section is provided with a tower top, the side surface of the tower top is provided with an upper reflux port, the lower part of the tower top is provided with a plurality of packing areas I and a plurality of liquid collecting redistributors I, the packing areas I and the liquid collecting redistributors I are distributed at intervals from top to bottom and are communicated with each other, each packing area I is internally provided with a gas-liquid distributor, the stripping section is sequentially provided with a feeding pipe, a tower plate shell, a plurality of packing areas II and a plurality of liquid collecting redistributors II from top to bottom, a tower plate assembly is arranged in the tower plate shell, the upper part of the feeding pipe is communicated with the liquid collecting redistributors I at the lower part of the rectifying section, the lower part of the feeding pipe is communicated with the inside of the tower plate shell, a plurality of filler district II and a plurality of liquid collection redistributor II are according to upper and lower interval distribution back and communicate each other, are equipped with gas-liquid distributor II in every filler district II, have the barrel at the sub-unit connection who carries liquid collection redistributor II of swift current section lower part, the barrel from top to bottom be equipped with tower cauldron material input tube and tower cauldron material output tube in proper order, the middle part at the barrel is installed to cauldron material input tube, the bottom at the barrel is installed to tower cauldron material output tube, tower cauldron material input tube and tower cauldron material output tube mutually perpendicular arrange.
The tower top is provided with ten packing areas I and ten liquid collecting redistributors I at the lower part, and the ten packing areas I and the ten liquid collecting redistributors I are distributed at intervals up and down and are communicated with each other. The packing in the packing area I is random packing or regular packing. The gas-liquid distributor I is set to be a gas-liquid split distributor. The liquid collecting redistributor I is set as a gas-liquid flow-dividing distributor. The tower plate component sequentially comprises twenty tower plates from top to bottom, and the twenty tower plates are connected in series. The tower plate is a bubble cap tower plate, a floating valve tower plate or a sieve plate. Two packing areas II and two liquid collecting redistributors II are distributed on the lower part of the tower plate shell, the two packing areas II and the two liquid collecting redistributors II are distributed at intervals up and down and are communicated with each other, and the packing in the packing areas II is random packing or regular packing.
The gas-liquid distributor II is set as a gas-liquid split distributor, and the liquid collecting redistributor II is set as a gas-liquid split distributor.
The utility model discloses following beneficial effect has: after the technical scheme more than adopting, the utility model discloses can prevent that tetrafluoroethylene auto-agglutination from blockking up, guarantee the steady operation of rectification.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural diagram of the tray assembly of the present invention.
Detailed Description
Embodiment one, in fig. 1 and fig. 2, the utility model provides a plate-packed mixed type rectifying tower, which is sequentially provided with a rectifying section 1, a stripping section 2 and a barrel 3 from top to bottom, the upper part of the rectifying section 1 is provided with a tower top 4, the side surface of the tower top 4 is provided with an upper reflux port 5, the lower part of the tower top 4 is distributed with a plurality of packing areas I6 and a plurality of liquid collecting redistributors I7, the plurality of packing areas I6 and the plurality of liquid collecting redistributors I7 are distributed at intervals from top to bottom and are mutually communicated, a gas-liquid distributor I8 is arranged in each packing area I6, the stripping section 2 is sequentially provided with a feed pipe 9, a tower plate shell 10, a plurality of packing areas II 12 and a plurality of liquid collecting redistributors II 13 from top to bottom, a tower plate component 11 is arranged in the tower plate shell 10, the upper part of the feed pipe 9 is communicated with the liquid collecting redistribut, the lower part of the feeding pipe 9 is communicated with the inside of a tower plate shell 10, a plurality of packing areas II 12 and a plurality of liquid collecting redistributors II 13 are distributed on the lower part of the tower plate shell 10, the packing areas II 12 and the liquid collecting redistributors II 13 are distributed at intervals up and down and are communicated with each other, a gas-liquid distributor II 17 is arranged in each packing area II 12, a cylinder 3 is connected with the lower part of the liquid collecting redistributor II 13 on the lower part of the lifting section 2, the cylinder 3 is sequentially provided with a tower kettle material input pipe 14 and a tower kettle material output pipe 15 from top to bottom, the tower kettle material input pipe 14 is arranged in the middle of the cylinder 3, the tower kettle material output pipe 15 is arranged at the bottom of the cylinder 3, the tower kettle material input pipe 14 and the tower kettle material output pipe 15 are vertically arranged, the tower top lower part of the tower of the embodiment is distributed with ten packing areas I6 and ten liquid collecting redistributors I7 at intervals up and are The packing in the packing area I6 is random packing or regular packing, the gas-liquid distributor I8 is a gas-liquid split-flow distributor, the liquid collecting redistributor I7 is arranged as a gas-liquid split-flow distributor, the tower plate component 11 of the embodiment sequentially comprises twenty tower plates 16 from top to bottom, the twenty tower plates 16 are connected in series, the tower plate 16 is a bubble cap tower plate, a float valve tower plate or a sieve plate, two packing areas II 12 and two liquid collecting redistributors II 13 are distributed at the lower part of the tower plate shell 10, the two packing areas II 12 and the two liquid collecting redistributors II 13 are distributed at intervals up and down and then are communicated with each other, the packing in the packing area II 12 is random packing or structured packing, the gas-liquid distributor II 17 is set as a gas-liquid split-flow distributor, and the liquid collecting redistributor II 13 is set as a gas-liquid split-flow distributor.
The utility model discloses a use method: a10 kt/year tetrafluoroethylene device is used, the diameter of a rectifying tower is DN1000, the diameter of an upper reflux opening 5 and the diameter of a feeding pipe 9 are DN65, the diameter of a tower bottom material input pipe 14 is DN200 and the diameter of a tower bottom material output pipe 15 is DN100, regular packing is adopted in a rectifying section and a stripping section, the height of the packing in a packing area I6 and the height of the packing in a packing area II 12 are both 24 meters, sieve plates are adopted in a stripping section, and the number of the sieve plates is 20. The pretreated tetrafluoroethylene cracking gas enters a rectifying tower from a feeding pipe 9, tetrafluoroethylene and light components enter an upper reflux opening 5 of a tower top 4 and are extracted, the temperature of the tower top 4 is-6.5 ℃, the pressure of the tower top 4 is 1.398MPaG, cracking raw materials and heavy components enter a tower kettle to be reboiled and extracted, the temperature of the tower kettle is 41 ℃, and the pressure of the tower top 4 is 1.45 MpaG. And (5) operating for half a year, and stabilizing the pressure difference at 0.055-0.06 MPa.
Claims (10)
1. Plate-packed mixed type rectifying tower, characterized by that it is equipped with rectifying section (1), stripping section (2) and barrel (3) from top to bottom in proper order, the upper portion of rectifying section (1) be equipped with top of the tower (4), be equipped with backward flow mouth (5) in the side of top of the tower (4), it has a plurality of filler districts I (6) and a plurality of liquid collection redistributor I (7) to distribute in the lower part of top of the tower (4), a plurality of filler districts I (6) and a plurality of liquid collection redistributor I (7) are according to upper and lower interval distribution and communicate each other, be equipped with gas-liquid distributor I (8) in every filler district I (6), stripping section (2) from top to bottom be equipped with inlet pipe (9), column plate shell (10), a plurality of filler district II (12) and a plurality of liquid collection redistributor II (13) in column plate shell (10), be equipped with column plate subassembly (11) in column plate shell (10), the liquid collection redistributor (7) The lower part of the feeding pipe (9) is communicated with the inside of the tower plate shell (10), a plurality of packing areas II (12) and a plurality of liquid collecting redistributors II (13) are distributed on the lower part of the tower plate shell (10), the packing areas II (12) and the liquid collecting redistributors II (13) are distributed at intervals up and down and then are communicated with each other, a gas-liquid distributor II (17) is arranged in each packing area II (12), the lower part of a liquid collecting redistributor II (13) at the lower part of the stripping section (2) is connected with a cylinder body (3), barrel (3) from top to bottom be equipped with tower cauldron material input tube (14) and tower cauldron material output tube (15) in proper order, install at the middle part of barrel (3) cauldron material input tube (14), install in the bottom of barrel (3) tower cauldron material output tube (15), tower cauldron material input tube (14) and tower cauldron material output tube (15) mutually perpendicular arrange.
2. The plate-packed mixed rectification column as claimed in claim 1, wherein ten packing blocks I (6) and ten liquid collecting redistributors I (7) are distributed in the lower part of the column top, and the ten packing blocks I (6) and the ten liquid collecting redistributors I (7) are distributed at intervals up and down and are communicated with each other.
3. The plate-packed rectification column as claimed in claim 1 or 2, wherein the packing in the packing region i (6) is random packing or structured packing.
4. The plate-packed rectification column as claimed in claim 1, wherein the gas-liquid distributor i (8) is a gas-liquid split distributor.
5. The plate-packed rectification column as claimed in claim 1 or 2, wherein the liquid collecting redistributor i (7) is configured as a gas-liquid split distributor.
6. The plate-packed rectification column as claimed in claim 1, wherein the tray assembly (11) comprises twenty trays (16) in sequence from top to bottom, and the twenty trays (16) are connected in series.
7. The plate-packed rectification column as claimed in claim 6, characterized in that the trays (16) are bubble cap trays, valve trays or sieve trays.
8. The plate-packed mixed rectification column as claimed in claim 1, wherein the lower part of the column plate shell (10) is provided with two packing regions II (12) and two liquid collecting redistributors II (13), and the two packing regions II (12) and the two liquid collecting redistributors II (13) are arranged at intervals up and down and then are communicated with each other.
9. The plate-packed rectification column as claimed in claim 1 or 8, wherein the packing in the packing region II (12) is random packing or structured packing.
10. The plate-packed rectification column as claimed in claim 1, wherein the gas-liquid distributor ii (17) is a gas-liquid split distributor, and the liquid collecting redistributor ii (13) is a gas-liquid split distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921661701.4U CN212914581U (en) | 2019-10-08 | 2019-10-08 | Plate filling and mixing type rectifying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921661701.4U CN212914581U (en) | 2019-10-08 | 2019-10-08 | Plate filling and mixing type rectifying tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212914581U true CN212914581U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921661701.4U Active CN212914581U (en) | 2019-10-08 | 2019-10-08 | Plate filling and mixing type rectifying tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212914581U (en) |
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2019
- 2019-10-08 CN CN201921661701.4U patent/CN212914581U/en active Active
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