CN211497436U - System for utilize ion exchange technology to carry out sulfolane and purify - Google Patents
System for utilize ion exchange technology to carry out sulfolane and purify Download PDFInfo
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- CN211497436U CN211497436U CN202020121317.1U CN202020121317U CN211497436U CN 211497436 U CN211497436 U CN 211497436U CN 202020121317 U CN202020121317 U CN 202020121317U CN 211497436 U CN211497436 U CN 211497436U
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- sulfolane
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Abstract
The utility model discloses an utilize ion exchange technology to carry out system that sulfolane purified, including sulfolane from extracting the pipeline, the recovery tower, sulfolane clarification plant, lye tank and solvent jar, sulfolane is from extracting the pipeline setting on the poor solvent line of recovery tower, in heat transfer device and prefilter jar entering sulfolane clarification plant's ion exchange column in proper order, sulfolane clarification plant links to each other with the solvent jar through first pipeline, the bottom of solvent jar passes through the machine pump and links to each other with stripper feed line, sulfolane clarification plant passes through the second pipeline and links to each other with lye tank, in order to its inside conveying alkali lye, sulfolane clarification plant has the waste liquid jar through third pipe connection, in order to discharge the waste liquid in the sulfolane clarification plant; the utility model discloses an ion exchange technology carries out purification treatment to sulfolane for indexes such as pH, chloride ion content, outward appearance of the sulfolane solvent in the system all have obvious improvement, have solved the processing difficult problem that the enterprise faces, have created considerable economic benefits.
Description
Technical Field
The utility model relates to a sulfolane extracts technology field, specifically is a system that utilizes ion exchange technology to carry out sulfolane and purifies.
Background
The refinery aromatic hydrocarbon extraction device adopts a sulfolane extraction process, uses sulfolane as a circulating solvent to separate C7 and fractions below in the reformed oil, and extracts and separates aromatic hydrocarbons by utilizing the difference of the solubility of the sulfolane to the aromatic hydrocarbons and non-aromatic hydrocarbons to obtain high-purity aromatic hydrocarbons and non-aromatic hydrocarbons.
The economical efficiency of the extraction process depends on the performance of the sulfolane solvent to a great extent, which not only influences the product purity, the yield and the energy consumption of the device, but also directly influences the long-period stable operation of the device. Because of the self physicochemical properties of the sulfolane solvent, under the normal working conditions of high temperature, water content, oxygen content and the like, a plurality of chemical reactions can be generated to generate acidic substances, so that the acid corrosion of equipment is caused, and meanwhile, trace chloride ions in the raw materials in the reformed oil are continuously enriched in the solvent, so that the chlorine corrosion of the equipment is caused. Moreover, because sulfolane is seriously degraded, when the operation reaches the middle stage, the tower wall of the stripping tower is leaked at multiple points, the whole hot well of the recovery tower is damaged, and a plurality of solvent pipelines are corroded and leaked; the accumulation of the solvent degraded polymer causes the blockage of a tower tray of the extraction tower and frequent phase mixing; the heat exchange efficiency is obviously reduced due to the blockage of the lean-rich solvent heat exchanger tube bundle, and the production load in summer is limited.
For the degradation problem, the conventional solutions are generally: adding organic amine MEA to inhibit the acidic environment after solvent deterioration or periodically stopping to clean the tower tray of the extraction tower or to purify sulfolane for the first time in the form of technical service and labor output or increase the discharge of waste sulfolane of the solvent regeneration tower; however, these methods can not stabilize the properties of sulfolane, but can only alleviate the problems of sulfolane degradation and equipment corrosion to a certain extent, so that a new process is urgently needed to improve the current situation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve sulfolane degradation problem, provide an utilize ion exchange technology to carry out the system that sulfolane purified for indexes such as pH, chloride ion content, outward appearance of the sulfolane solvent in the system have obvious improvement, can be better be applied to in the extraction device and can online continuous operation.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the utility model provides an utilize ion exchange technology to carry out system that sulfolane purified, including sulfolane from extracting the pipeline, the recovery tower, sulfolane clarification plant, lye tank and solvent jar, sulfolane is from extracting the pipeline setting on the poor solvent line of recovery tower, in heat transfer device and prefilter jar entering sulfolane clarification plant's ion exchange column in proper order, sulfolane clarification plant links to each other with the solvent jar through first pipeline, the bottom of solvent jar links to each other with stripper feed line through the machine pump, so that the acidic impurity that the desorption degradation produced gets back to in the solvent jar, and carry sulfolane to stripper feed line under the effect of machine pump, sulfolane clarification plant passes through the second pipeline and links to each other with lye tank, in order to its inside alkali lye that carries, sulfolane clarification plant has the waste liquid jar through third pipe connection, in order to discharge the waste liquid among the sulfolane clarification plant.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: a standby bypass for enabling the sulfolane to directly enter the sulfolane purification equipment around the prefiltering tank is arranged between the heat exchange device and the sulfolane purification equipment.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: and the sulfolane purification equipment is provided with a nitrogen pipeline, an instrument air pipeline and a demineralized water pipeline.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: a check valve is arranged on a liquid inlet pipeline of the alkali liquor tank, and an atmospheric pipeline used for balancing the pressure in the tank is arranged at the top of the alkali liquor tank.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: be equipped with waste liquid pipeline I and waste liquid pipeline II on the sulfolane clarification plant, waste liquid pipeline I links to each other with sulfolane clarification plant respectively with waste liquid pipeline II's one end, and the other end links to each other with the third pipeline through a three-way valve.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: the top of the waste liquid tank is communicated with a low-pressure gas pipeline, and the bottom of the waste liquid tank is provided with a liquid drainage pipeline.
As a further optimization of the system for purifying sulfolane by using ion exchange technology: and each pipeline of the system is provided with a valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the utility model adopts the ion exchange technology to purify sulfolane, so that indexes such as pH, chloride ion content, appearance and the like of the sulfolane solvent in the system are obviously improved, and a monoethanolamine neutralizer is not required to be added into the extraction device;
2) the utility model discloses a sulfolane clarification plant has been add to the flow transformation of system, draws forth a solvent from extraction plant recovery tower bottom pump export and gets into sulfolane clarification plant and purify, then gets into the solvent jar, draws forth a solvent simultaneously from the solvent jar and replenishes to extracting the solvent system in to realize online continuous operation;
3) the utility model discloses an ion exchange technology carries out purification treatment to sulfolane, has solved the processing difficult problem that the enterprise faced, has created considerable economic benefits.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
the labels in the figure are: 1. sulfolane is from extracting the pipeline, 2, heat transfer device, 3, prefilter jar, 4, sulfolane clarification plant, 5, lye tank, 6, solvent jar, 7, the recovery tower, 8, first pipeline, 9, the machine pump, 10, strip tower incoming line, 11, the second pipeline, 12, the third pipeline, 13, waste liquid jar, 14, reserve bypass, 15, the nitrogen gas pipeline, 16, instrument wind pipeline, 17, demineralized water pipeline, 18, the inlet line, 19, the check valve, 20, the atmosphere pipeline, 21, waste liquid pipeline I, 22, waste liquid pipeline II, 23, the three-way valve, 24, low pressure gas pipeline, 25, the drain line.
Detailed Description
The invention will be further elucidated below on the basis of specific embodiments.
Example 1
A system for purifying sulfolane by using an ion exchange technology comprises a sulfolane self-extraction pipeline 1, a recovery tower 7, a sulfolane purifying device 4, an alkali liquor tank 5 and a solvent tank 6, wherein the sulfolane self-extraction pipeline 1 is arranged on a lean solvent line of the recovery tower 7 and sequentially passes through a heat exchange device 2 and a pre-filtering tank 3 to enter an ion exchange column of the sulfolane purifying device 4, the sulfolane purifying device 4 is provided with a nitrogen pipeline 15, an instrument air pipeline 16 and a demineralized water pipeline 17, the sulfolane purifying device 4 is connected with the solvent tank 6 through a first pipeline 8, the bottom of the solvent tank 6 is connected with a stripping tower feeding pipeline 10 through a mechanical pump 9 so as to enable acidic impurities generated by degradation to be removed to return to the solvent tank 6, and the sulfolane is conveyed to the stripping tower feeding pipeline 10 under the action of the mechanical pump 9; the sulfolane purifying equipment 4 is connected with an alkali liquor tank 5 through a second pipeline 11 so as to convey alkali liquor to the inside of the alkali liquor tank, a liquid inlet pipeline 18 of the alkali liquor tank 5 is provided with a one-way valve 19, and the top of the alkali liquor tank 5 is provided with an atmospheric pipeline 20 for balancing the pressure in the tank; sulfolane clarification plant 4 is connected with waste liquid jar 13 through third pipeline 12 to the waste liquid in the discharge sulfolane clarification plant 4, waste liquid jar 13's top communicates with each other with low pressure gas pipeline 24, and the bottom is equipped with flowing back pipeline 25.
And each pipeline of the system is provided with a valve.
Example 2
This example is a further optimization of example 1: be equipped with between heat transfer device 2 and sulfolane clarification plant 4 and supply sulfolane to directly get into the reserve bypass 14 of sulfolane clarification plant 4 around prefiltering jar 3, when clearing up prefiltering jar 3, sulfolane after heat transfer device 2 heat transfer gets into the ion exchange column of sulfolane clarification plant 4 from reserve bypass 14 and purifies, can not influence sulfolane's purification because of clearing up prefiltering jar 3.
Example 3
This example is a further optimization of example 1: as shown in fig. 1, be equipped with waste liquid pipeline I21 and waste liquid pipeline II 22 on the sulfolane clarification plant 4, waste liquid pipeline I21 and the one end of waste liquid pipeline II 22 link to each other with sulfolane clarification plant 4 respectively, and the other end links to each other with third pipeline 12 through a three-way valve 23, because sulfolane clarification plant 4 is an equipment that integrates, consequently handles the waste liquid through setting up two different routes for the waste liquid gets into in the waste liquid jar 13 through different pipelines.
Claims (7)
1. A system for purifying sulfolane by using an ion exchange technology is characterized in that: comprises a sulfolane self-extraction pipeline (1), a recovery tower (7), sulfolane purification equipment (4), an alkali liquor tank (5) and a solvent tank (6), wherein the sulfolane self-extraction pipeline (1) is arranged on a poor solvent line of the recovery tower (7) and sequentially passes through a heat exchange device (2) and a pre-filtering tank (3) to enter an ion exchange column of the sulfolane purification equipment (4), the sulfolane purification equipment (4) is connected with the solvent tank (6) through a first pipeline (8), the bottom of the solvent tank (6) is connected with a stripping tower feeding pipeline (10) through a pump (9) so as to lead acid impurities generated by removal and degradation to return to the solvent tank (6), and convey the sulfolane to the stripping tower feeding pipeline (10) under the action of the pump (9), the sulfolane purification equipment (4) is connected with the alkali liquor tank (5) through a second pipeline (11) so as to convey alkali liquor to the interior of the sulfolane self-extraction pipeline (1), the sulfolane purification equipment (4) is connected with a waste liquid tank (13) through a third pipeline (12) to discharge waste liquid in the sulfolane purification equipment (4).
2. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: a standby bypass (14) for enabling the sulfolane to directly enter the sulfolane purification equipment (4) around the pre-filtering tank (3) is arranged between the heat exchange device (2) and the sulfolane purification equipment (4).
3. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: and a nitrogen pipeline (15), an instrument air pipeline (16) and a demineralized water pipeline (17) are arranged on the sulfolane purifying equipment (4).
4. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: a one-way valve (19) is arranged on a liquid inlet pipeline (18) of the lye tank (5), and an atmospheric pipeline (20) used for balancing the pressure in the tank is arranged at the top of the lye tank (5).
5. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: be equipped with waste liquid pipeline I (21) and waste liquid pipeline II (22) on sulfolane clarification plant (4), the one end of waste liquid pipeline I (21) and waste liquid pipeline II (22) links to each other with sulfolane clarification plant (4) respectively, and the other end passes through a three-way valve (23) and links to each other with third pipeline (12).
6. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: the top of the waste liquid tank (13) is communicated with a low-pressure gas pipeline (24), and the bottom of the waste liquid tank is provided with a liquid discharge pipeline (25).
7. The system for purifying sulfolane by ion exchange technology according to claim 1, wherein: and each pipeline of the system is provided with a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121317.1U CN211497436U (en) | 2020-01-19 | 2020-01-19 | System for utilize ion exchange technology to carry out sulfolane and purify |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121317.1U CN211497436U (en) | 2020-01-19 | 2020-01-19 | System for utilize ion exchange technology to carry out sulfolane and purify |
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| CN211497436U true CN211497436U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020121317.1U Expired - Fee Related CN211497436U (en) | 2020-01-19 | 2020-01-19 | System for utilize ion exchange technology to carry out sulfolane and purify |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115672410A (en) * | 2022-11-07 | 2023-02-03 | 国家能源集团煤焦化有限责任公司 | Regeneration system for sulfolane regeneration and regeneration system |
-
2020
- 2020-01-19 CN CN202020121317.1U patent/CN211497436U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115672410A (en) * | 2022-11-07 | 2023-02-03 | 国家能源集团煤焦化有限责任公司 | Regeneration system for sulfolane regeneration and regeneration system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200915 Termination date: 20210119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |