CN106588541B - A kind of extracting torch tank lime set recycle device - Google Patents
A kind of extracting torch tank lime set recycle device Download PDFInfo
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- CN106588541B CN106588541B CN201611131442.5A CN201611131442A CN106588541B CN 106588541 B CN106588541 B CN 106588541B CN 201611131442 A CN201611131442 A CN 201611131442A CN 106588541 B CN106588541 B CN 106588541B
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
- C07C7/05—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds
- C07C7/08—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds by extractive distillation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A kind of extracting torch tank lime set recycle device comprising extracting torch tank, wet solvent tank, torch tank lime set pump, torch tank lime set pipeline, extraction solvent pipeloop, lean solvent pump, extraction distillation tower, extractive distillation tower reboiler, non-aromatics vapor phase pipeline and non-aromatics destilling tower；Wet solvent tank connection extracting torch tank, extracting torch tank are connected to torch tank lime set pump by pipeline；Torch tank lime set pump is connected to extraction solvent pipeloop by torch tank lime set pipeline；Extraction solvent pipeloop one end connects lean solvent pump, and the other end connects extraction distillation tower；Extractive distillation top of tower is connected to non-aromatics destilling tower by non-aromatics gas phase pipeline, and extraction distillation tower lower part connects extractive distillation tower reboiler.It solves the problems, such as in extracting torch tank that lime set easily causes mixed fragrant product unqualified by row's Underground Solvent tank recycling, improves non-aromatic content in the mixed fragrant product of extracting.
Description
Technical field
The invention belongs to chemical process fields, and in particular to arrive a kind of extracting lime set recycling and reusing system.
Background technique
Aromatic extraction unit is a production unit of the combined unit.Petrochemical industry petrochemical industry science is ground in unit use
The Sulfolane Extraction distillation technique (SED) for studying carefully institute (RIPP), from upstream Reformed Gasoline C6~C7Fraction and xylene isomerization lighter hydrocarbons
In isolated BTX aromatics (benzene and toluene) and non-aromatics.BTX aromatics produced send aromatic hydrocarbons rectifying part further to separate
Benzene and toluene product are obtained, non-aromatics directly send product tank field as byproduct.
Light aromatic hydrocarbons (benzene, toluene) are mainly derived from the hydrogenated pyrolysis gasoline that catalytic reforming generates oil and ethylene unit by-product.
Aromatics separation generally uses solvent extraction process (liquid liquid extraction process) or extractive distillation method from both gasoline.Using by China
Petrochemical industry Research Institute of Petro-Chemical Engineering exploitation using sulfolane as the SED method of extractive distillation solvent.
Sulfolane Extraction distillation (SED) aromatics separation is a typical physical separating process, which, which uses, contains water ring
Fourth sulfone is solvent, mainly influences different basic principles to hydro carbons each component relative volatility using solvent, passes through extracting rectifying
Achieve the purpose that aromatics separation and non-aromatics.Device includes extraction distillation tower (ED), non-aromatics destilling tower, solvent recovery tower, molten
Agent regenerator and other auxiliary equipment.
Since voltage-controlled and emptying, the fixed gas of generation need to put flare system, there is portion gas condensation after torch of setting fire in production
Get off, torch tank need to be collected into.Extraction unit is equipped with independent torch tank and puts flare system.Extraction unit torch point of respectively setting fire all passes through
After individual torch tank collects lime set, fixed gas is uniformly discharged into torch general pipeline and enters company's flare system, and lime set does not pass through torch
Tank to extraction solvent tank pipeline drains into the collection of Underground Solvent tank.Material in Underground Solvent tank mainly passes through Underground Solvent tank pump row
To regenerator recycling design.During normal production extracting torch tank recycling lime set be C6-7 it is non-aromatic, it is non-aromatic be discharged into ground tank after
Non-aromatic while entering regenerator recycling sulfolane solvent also to enter in recovery tower, this part is non-aromatic to enter recovery tower
In rectifying product (the mixed virtue of C6-7), recovery tower rectifying product (the mixed virtue of C6-7) has strict demand to non-aromatic content.In this way to recycling
Tower rectifying product has quality influence, and fragrant product quality mixed on recycling column overhead influences, and influences to produce.
Summary of the invention
To solve the problems, such as that existing system easily causes mixed fragrant product unqualified, lime set in torch tank is extracted in the present invention and passes through fire
It is improved to extraction distillation tower after the pump pressurization of torch tank lime set, recycles lime set in torch tank.To achieve the above object, technology of the invention
Scheme is as follows:
A kind of extracting torch tank lime set recycling system comprising solidifying including extracting torch tank, wet solvent tank, torch tank
It is liquid pump, torch tank lime set pipeline, extraction solvent pipeloop, lean solvent pump, extraction distillation tower, extractive distillation tower reboiler, non-
Aromatic hydrocarbons vapor phase pipeline and non-aromatics destilling tower；Wet solvent tank connection extracting torch tank, extracting torch tank are connected to by pipeline
Torch tank lime set pump；Torch tank lime set pump is connected to extraction solvent pipeloop by torch tank lime set pipeline；Extraction solvent follows
Endless tube line one end connects lean solvent pump, and the other end connects extraction distillation tower；Extractive distillation top of tower passes through non-aromatics gas phase pipeline
It is connected to non-aromatics destilling tower, extraction distillation tower lower part connects extractive distillation tower reboiler.
Extracting torch tank is normal pressure tank, and setting is square on the ground.
Extraction solvent pipeloop temperature is not higher than 120 DEG C, and pressure is not less than 1.0MPa.
The metering pump that torch tank lime set pump is arranged on the tank body for extracting torch tank.
Extractive distillation tower reboiler is filled with steam, and steam condensation water is discharged；Steam-charged pressure is 2.2MPa.
Torch tank lime set pipeline provides extracting torch tank for extraction distillation tower and recycles lime set charging, torch tank lime set pipeline temperature
Degree is not higher than 40 DEG C, and pressure is not less than 1.0MPa.
When extracting torch tank liquid level is higher, it is molten to enter extracting by torch tank lime set pipeline for starting torch tank lime set pump
After agent pipeloop, extraction distillation tower is entered back into.
The present invention extract torch tank in lime set through pump pressurization after enter extraction distillation tower recycling, extract torch tank in lime set not
Again by row's Underground Solvent tank recycling, solves in extracting torch tank lime set and easily cause mixed virtue to produce by row's Underground Solvent tank recycling
The unqualified problem of product.
The invention has the benefit that the lime set extracted in torch tank is improved to extraction distillation tower, after rectifying
C6-7 is non-aromatic to obtain the non-aromatic product of gas phase in tower top, prevents fragrant product quality mixed on extracting from influencing, solves sulfolane and recycle solvent
Deterioration problem solves the problems, such as in extracting torch tank that lime set easily causes mixed fragrant product unqualified by row's Underground Solvent tank recycling.
Non-aromatic content in the mixed fragrant product of extracting is improved, is conducive to be disproportionated the control of unit benzaldehyde product quality, reduces the extraction of Ben Ta order top benzene
Amount saves device operation energy consumption.
Detailed description of the invention
Fig. 1, process flow chart of the invention；
In figure: 1, extracting torch tank, 2, torch tank lime set pump, 3, torch tank lime set pipeline, 4, extraction solvent pipeloop,
5, extraction distillation tower, 6, extractive distillation tower reboiler, 7, wet solvent tank, 8, lean solvent pump, 9, steam condensation water, 10, steam, 11,
Non-aromatics destilling tower, 12, non-aromatics gas phase pipeline.
Specific embodiment
A kind of extracting torch tank lime set recycling system comprising extracting torch tank 1, wet solvent tank 7, torch tank lime set
Pump 2, torch tank lime set pipeline 3, extraction solvent pipeloop 4, lean solvent pump 8, extraction distillation tower 5, extractive distillation tower reboiler
6, non-aromatics gas phase pipeline 12 and non-aromatics destilling tower 11；The connection extracting torch tank 1 of wet solvent tank 7, extracting torch tank 1 pass through pipe
Road is connected to torch tank lime set pump 2；Torch tank lime set pump 2 is connected to extraction solvent pipeloop by torch tank lime set pipeline 3
4；4 one end of extraction solvent pipeloop connects lean solvent pump 8, and the other end connects extraction distillation tower 5；Lead at the top of extraction distillation tower 5
It crosses non-aromatics gas phase pipeline 12 and is connected to non-aromatics destilling tower 11,5 lower part of extraction distillation tower connects extractive distillation tower reboiler 6.
Extracting torch tank 1 is normal pressure tank, and setting is square on the ground.Extracting torch tank 1 be one reinstall receipts extracting torch put
The container of empty lime set, recycle lime set after using flare system carry out pressure release.
4 temperature of extraction solvent pipeloop is not higher than 120 DEG C, and pressure is not less than 1.0MPa.The pipeline main function be for
Extraction distillation tower provides sulfolane and recycles solvent feed.
Torch tank lime set pump 2 is the metering pump being arranged on the tank body for extract torch tank 1.For extracting torch lime set tank in liquid
Outlet when position is high.
Extractive distillation tower reboiler 6 is filled with steam 10, and steam condensation water 9 is discharged；The pressure for being filled with steam 10 is 2.2MPa.
Torch tank lime set pipeline 3 is that extraction distillation tower 5 provides extracting torch tank recycling lime set charging, torch tank lime set pipeline
3 temperature are not higher than 40 DEG C, and pressure is not less than 1.0MPa.
The method of operation of the invention is as follows:
When extracting 1 liquid level of torch tank is higher, starting torch tank lime set pump 2 is entered by torch tank lime set pipeline 3 and is extracted
After solvent pipeloop 4, extraction distillation tower 5 is entered back into.
Extraction distillation tower 5 is substantially atmospheric distillation tower, under normal pressure distillation operation, and effect is steamed using solvent extraction
The key equipment for evaporating aromatics separation and non-aromatics is designed as valve tower, 80 blocks of column plates.From 5 feed surge tank of extraction distillation tower
C6 ~ C7 fraction enter the top of tower, system sulfolane circulation solvent is entered by top of tower, C6 ~ C7 fraction feed inlet the above are
Extracting rectification section, lower section are aromatic hydrocarbons stripping section.Lime set (predominantly C6-7 is non-aromatic) is with sulfolane solvent in this way in extracting torch tank 1
Multitple extraction rectifying is carried out in into extraction distillation tower 5, solvent and charging carry out multitple extraction rectifying in tower, and tower top obtains non-
Aromatic hydrocarbon product, tower bottom obtain the rich solvent containing aromatic hydrocarbons.
When extracting in 1 recovered material of torch tank containing benzene and more toluene (mainly after steaming tower of stopping work), it cannot will take out
The torch tank lime set recycled in torch tank 1 is proposed to enter in extraction distillation tower 5.Such material will be handled by original process.
Claims (7)
1. a kind of extracting torch tank lime set recycle device, it is characterised in that: including extracting torch tank, wet solvent tank, torch
Tank lime set pump, torch tank lime set pipeline, extraction solvent pipeloop, lean solvent pump, extraction distillation tower, extraction distillation tower boil again
Device, non-aromatics vapor phase pipeline and non-aromatics destilling tower；Wet solvent tank connection extracting torch tank, extracting torch tank are connected by pipeline
It is connected to torch tank lime set pump；Torch tank lime set pump is connected to extraction solvent pipeloop by torch tank lime set pipeline；It extracts molten
Agent pipeloop one end connects lean solvent pump, and the other end connects extraction distillation tower；Extractive distillation top of tower passes through non-aromatics gas phase
Pipeline is connected to non-aromatics destilling tower, and extraction distillation tower lower part connects extractive distillation tower reboiler.
2. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: the extracting fire
Torch tank is normal pressure tank, and setting is square on the ground.
3. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: the extracting is molten
Agent pipeloop temperature is not higher than 120 DEG C, and pressure is not less than 1.0MPa.
4. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: the torch tank
The metering pump that lime set pump is arranged on the tank body for extracting torch tank.
5. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: the extracting is steamed
It evaporates tower reboiler and is filled with steam, steam condensation water is discharged；Steam-charged pressure is 2.2MPa.
6. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: the torch tank
Lime set pipeline provides extracting torch tank for extraction distillation tower and recycles lime set charging, and torch tank lime set line temperature is not higher than 40 DEG C,
Pressure is not less than 1.0MPa.
7. a kind of extracting torch tank lime set recycle device according to claim 1, it is characterised in that: when extracting torch
When tank liquid level is higher, starting torch tank lime set pump after entering extraction solvent pipeloop by torch tank lime set pipeline, is entered back into
Extraction distillation tower.
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| CN201611131442.5A CN106588541B (en) | 2016-12-09 | 2016-12-09 | A kind of extracting torch tank lime set recycle device |
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| CN201611131442.5A CN106588541B (en) | 2016-12-09 | 2016-12-09 | A kind of extracting torch tank lime set recycle device |
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| CN106588541A CN106588541A (en) | 2017-04-26 |
| CN106588541B true CN106588541B (en) | 2019-04-16 |
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| CN112495049A (en) * | 2020-12-28 | 2021-03-16 | 大连福佳·大化石油化工有限公司 | Moisturizing solvent filtering system |
Citations (3)
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| CN103121904A (en) * | 2011-11-18 | 2013-05-29 | 中国石油化工股份有限公司 | Utilization method for hydrocarbon fuel gas rich in alkyne |
| CN103551009A (en) * | 2013-11-20 | 2014-02-05 | 天津渤海化工有限责任公司天津碱厂 | Organic matter recovery device in torch pipeline |
| CN105237511A (en) * | 2015-10-24 | 2016-01-13 | 大连福佳·大化石油化工有限公司 | Extraction solvent recycling and reusing system |
-
2016
- 2016-12-09 CN CN201611131442.5A patent/CN106588541B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121904A (en) * | 2011-11-18 | 2013-05-29 | 中国石油化工股份有限公司 | Utilization method for hydrocarbon fuel gas rich in alkyne |
| CN103551009A (en) * | 2013-11-20 | 2014-02-05 | 天津渤海化工有限责任公司天津碱厂 | Organic matter recovery device in torch pipeline |
| CN105237511A (en) * | 2015-10-24 | 2016-01-13 | 大连福佳·大化石油化工有限公司 | Extraction solvent recycling and reusing system |
Non-Patent Citations (1)
| Title |
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| 环丁砜芳烃抽提新工艺;何琨;《石油化工》;20031231;第32卷;第295-297页 |
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