CN205152129U - Extract solvent recovery system of recycling - Google Patents
Extract solvent recovery system of recycling Download PDFInfo
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- CN205152129U CN205152129U CN201520824691.7U CN201520824691U CN205152129U CN 205152129 U CN205152129 U CN 205152129U CN 201520824691 U CN201520824691 U CN 201520824691U CN 205152129 U CN205152129 U CN 205152129U
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Abstract
The utility model provides an extract solvent recovery system of recycling which includes solvent regenerator column, recovered solvent pipeline, recovery tower, waste residue discharge port, lean solvent pump, first pipeline, secret solvent jar, solvent underground pump, second pipeline, solvent regenerator column top of the tower passes through recovered solvent pipe connection to recovery tower, sets up the waste residue discharge port at the bottom of the solvent regeneration tata, and the lean solvent pump is connected to solvent underground pump through first pipe connection to solvent regenerator column, secret solvent jar, and solvent underground pump passes through second pipe connection to first pipeline. The utility model provides an extraction system operation steady in a long -term is guaranteed to sulfolane circulation solvent degradation problem, reduce the extraction solvent filter clearance frequency, practice thrift maintenance cost.
Description
Technical field
The utility model belongs to chemical technique field, is specifically related to a kind of extraction solvent recycling system.
Background technology
Aromatic extraction unit is a productive unit of this machinery.This unit adopts Sulfolane Extraction distil process, is separated and obtains BTX aromatics and non-aromatics from upstream reformed gasoline C6 ~ C7 cut and xylene isomerization lighter hydrocarbons.The BTX aromatics produced is sent aromatic hydrocarbons rectifying part to be separated further and is obtained Benzene and Toluene product, and non-aromatics directly send product tank field as byproduct.
Light aromatic hydrocarbons is mainly derived from the hydrogenated pyrolysis gasoline that catalytic reforming generates oil and ethylene unit by-product.From these two kinds of gasoline, aromatics separation generally adopts solvent extraction process or extractive distillation method.Use what developed by Sinopec Research Institute of Petro-Chemical Engineering to take tetramethylene sulfone as the SED method of extractive distillation solvent.
Sulfolane Extraction fractionation by distillation aromatic hydrocarbons is a typical physical separating process, this technique adopts moisture tetramethylene sulfone to be solvent, mainly utilize solvent to affect different ultimate principles to hydro carbons each component relative volatility, reached the object of aromatics separation and non-aromatics by extracting rectifying.Device comprises solvent tower, non-aromatics distillation tower, solvent recovery tower, solvent regeneration tower and other off-set facility.
Because tetramethylene sulfone has certain deterioration in production, produce high polymer, solvent property is degenerated.Be provided with the systems such as solvent cycle strainer and solvent regeneration tower, keep solvent cleaned.System is provided with lower solvent collecting system, stop or repair apparatus process in, in system solvent by this system solvent be discharged to Underground Solvent tank collect.In normal production, solvent cycle strainer is before cleaning, and in strainer, solvent discharge is collected to Underground Solvent tank.Solvent regeneration tower cleaning fore portion solvent is also discharged to Underground Solvent tank and collects.The solvent being discharged into ground tank all contains a large amount of high polymer, and directly enters solvent tower and be back to use extraction system.Pollute solvent systems like this, long-time running causes circulating solvent deterioration serious, and impact is produced.
Summary of the invention
In view of the defect that background technology exists, the utility model provides a kind of extraction solvent recycling system, the tetramethylene sulfone of its recoverable deterioration.
For achieving the above object, the technical scheme that the utility model provides is to provide a kind of extraction solvent recycling system, it is characterized in that: comprise solvent regeneration tower, recycling design pipeline, recovery tower, waste sludge discharge mouth, lean solvent pump, the first pipeline, Underground Solvent tank, solvent underground pump, second pipe; Solvent reclamation column overhead is connected to recovery tower by recycling design pipeline, waste sludge discharge mouth is set at the bottom of solvent regeneration tower tower, lean solvent pump is connected to solvent regeneration tower by the first pipeline, and Underground Solvent tank is connected to solvent underground pump, and solvent underground pump is connected to the first pipeline by second pipe.Described second pipe is connected to wet NaOH solution tank NaOH by the 3rd pipeline.Interpolation type reboiler is provided with at the bottom of the tower of described solvent regeneration tower.Described interpolation type reboiler is connected with 2.2Mpa steam-pipe.Described first pipeline is arranged flowrate control valve group and the bypass of valve group, the interface of the first pipeline and second pipe is arranged between lean solvent pump and flowrate control valve group.
The beneficial effects of the utility model:
1, the solvent in Underground Solvent tank is improved to solvent regeneration tower, the solvent after regeneration arrives solvent circulation again, prevents the secondary pollution to whole solvent systems, solves tetramethylene sulfone circulating solvent deterioration problem, ensures that extraction system long-term stability is run.
2, Underground Solvent tank recovered solvent enters the extraction solvent recycle system after regeneration, reduces the extraction solvent strainer cleaning frequency, saves maintenance cost.
Feature of the present utility model:
1, solvent underground pump: the tank body of Underground Solvent tank is arranged solvent underground pump, arranges outward when high liquid level for Underground Solvent.
2, the flowrate control valve group on the first pipeline and the bypass of valve group: the recycling design beaten from Underground Solvent pump, enter solvent regeneration tower feed rate by the flowrate control valve group on the first pipeline and valve group Bypass Control recycling design.
3, Underground Solvent tank: Underground Solvent tank is and reinstalls the container receiving extraction solvent, and it is anti-condensation that winter need use low-pressure steam to carry out heating, flare system and blowdown system can be utilized to carry out pressure release, be normal pressure tank, be arranged on below ground.
4, recycling design pipeline: this pipeline Main Function is for solvent regeneration tower provides recycling design charging, and temperature can not higher than 170 DEG C, and pressure can not lower than 0.2MPa.
5, solvent regeneration tower: solvent regeneration tower is in fact a decompression evaporator, its effect is removed the polymkeric substance in solvent and the residual quarrel of solid, solvent is purified, thus ensures the cleaning of whole solvent system.The principal element affecting solvent reclamation operation has residual voltage, regeneration column bottom temperature etc.Solvent regeneration tower overhead gas directly turns back at the bottom of solvent recovery tower, and its working pressure is determined by solvent recovery tower working pressure.In order to avoid solvent thermal degraded, solvent reclamation temperature controls usually at 170 ~ 177 DEG C.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present utility model.
In figure, 1, solvent regeneration tower, 2, recycling design pipeline, 3, recovery tower, 4, waste sludge discharge mouth, 5, lean solvent pump, 6, the first pipeline, 7, Underground Solvent tank, 8, solvent underground pump, 9, second pipe, the 10, the 3rd pipeline, 11, wet NaOH solution tank NaOH, 12, interpolation type reboiler, 13, flowrate control valve group, 14, the bypass of valve group, 15,2.2Mpa steam-pipe.
Embodiment:
A kind of extraction solvent recycling system, is characterized in that: comprise solvent regeneration tower 1, recycling design pipeline 2, recovery tower 3, waste sludge discharge mouth 4, lean solvent pump 5, first pipeline 6, Underground Solvent tank 7, solvent underground pump 8, second pipe 9; Solvent regeneration tower 1 tower top is connected to recovery tower 3 by recycling design pipeline 2, at the bottom of solvent regeneration tower 1 tower, waste sludge discharge mouth 4 is set, lean solvent pump 5 is connected to solvent regeneration tower 1 by the first pipeline 6, Underground Solvent tank 7 is connected to solvent underground pump 8, and solvent underground pump 8 is connected to the first pipeline 6 by second pipe 9.Described second pipe 9 is connected to wet NaOH solution tank NaOH 11 by the 3rd pipeline 10.Interpolation type reboiler 12 is provided with at the bottom of the tower of described solvent regeneration tower 1.Described interpolation type reboiler 12 is connected with 2.2Mpa steam-pipe 15.The interface described first pipeline 6 being arranged flowrate control valve group 13 and valve group bypass 14, first pipeline 6 and second pipe 9 is arranged between lean solvent pump 5 and flowrate control valve group 13.
The utility model is used for reclaiming inferior sulfolane solvent first by being back to use extractive distillation solvent circulation after clean regeneration.Solvent in solvent ground tank 7 is improved to solvent regeneration tower 1, and the solvent after regeneration arrives solvent circulation again.
Equipment operation scheme: when underground solvent tank 7 liquid level is higher, starts solvent underground pump 8, controls recycling design enter solvent regeneration tower 1 feed rate by the flowrate control valve group 13 on the first pipeline 6 and valve group bypass 14.Solvent regeneration tower 1 operates under vacuo, and be actually a decompression evaporator, top is connected with recovery tower 3.Be provided with interpolation type reboiler at the bottom of tower, adopt 2.2MPag steam to do heat source.The recycling design of ground tank solvent pump 8 enters solvent regeneration tower 1 by solvent regeneration tower 1 flow control and carries out stripping, remove high molecular polymer wherein and other mechanical impuritys, the gas phase (176 DEG C ,-0.015MPag) that solvent regeneration tower 1 tower top steams directly enters bottom recovery tower 3.At the bottom of solvent regeneration tower 1 tower, residue is irregularly discharged by waste sludge discharge mouth 4.
It should be noted that when more containing non-aromatics in underground solvent tank 7 recovered material, recycling design in Underground Solvent tank 7 can not be entered in extraction solvent regenerator column.This kind of material will be processed by original flow process.
Claims (4)
1. an extraction solvent recycling system, is characterized in that: comprise solvent regeneration tower (1), recycling design pipeline (2), recovery tower (3), waste sludge discharge mouth (4), lean solvent pump (5), the first pipeline (6), Underground Solvent tank (7), solvent underground pump (8), second pipe (9); Solvent regeneration tower (1) tower top is connected to recovery tower (3) by recycling design pipeline (2), waste sludge discharge mouth (4) is set at the bottom of solvent regeneration tower (1) tower, lean solvent pump (5) is connected to solvent regeneration tower (1) by the first pipeline (6), Underground Solvent tank (7) is connected to solvent underground pump (8), and solvent underground pump (8) is connected to the first pipeline (6) by second pipe (9).
2. a kind of extraction solvent recycling system according to claim 1, is characterized in that: described second pipe (9) is connected to wet NaOH solution tank NaOH (11) by the 3rd pipeline (10).
3. a kind of extraction solvent recycling system according to claim 1, is characterized in that: be provided with interpolation type reboiler (12) at the bottom of the tower of described solvent regeneration tower (1).
4. a kind of extraction solvent recycling system according to claim 3, is characterized in that: described interpolation type reboiler (12) is connected with 2.2Mpa steam-pipe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520824691.7U CN205152129U (en) | 2015-10-24 | 2015-10-24 | Extract solvent recovery system of recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520824691.7U CN205152129U (en) | 2015-10-24 | 2015-10-24 | Extract solvent recovery system of recycling |
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| Publication Number | Publication Date |
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| CN205152129U true CN205152129U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520824691.7U Active CN205152129U (en) | 2015-10-24 | 2015-10-24 | Extract solvent recovery system of recycling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068631A (en) * | 2019-05-21 | 2019-07-30 | 上海赛科石油化工有限责任公司 | A kind of chromatograph exhaust system and application thereof |
| 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 |
-
2015
- 2015-10-24 CN CN201520824691.7U patent/CN205152129U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068631A (en) * | 2019-05-21 | 2019-07-30 | 上海赛科石油化工有限责任公司 | A kind of chromatograph exhaust system and application thereof |
| CN110068631B (en) * | 2019-05-21 | 2024-01-23 | 上海赛科石油化工有限责任公司 | Chromatograph discharge system and application thereof |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |