CN2709446Y - Purification device aromatics extractant sulfolane - Google Patents
Purification device aromatics extractant sulfolane Download PDFInfo
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- CN2709446Y CN2709446Y CN 200420051766 CN200420051766U CN2709446Y CN 2709446 Y CN2709446 Y CN 2709446Y CN 200420051766 CN200420051766 CN 200420051766 CN 200420051766 U CN200420051766 U CN 200420051766U CN 2709446 Y CN2709446 Y CN 2709446Y
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Abstract
The utility model discloses a purification device of aromatic extraction solvent sulfolane, respectively comprising a feed pump, a precise filter, an adsorption tank and connection pipes between the feed pump, the precise filter and the adsorption tank. The end of the feed pump is connected with a feed tube, and the end of the adsorption tank is connected with a discharge tube. The utility model does not influence the normal running of an aromatic solvent extractor. The feed tube of the end of the feed pump and the discharge tube of the end of the adsorption tank are connected on a pipeline by which solvent sulfolane is entered into the extraction tower in the aromatic solvent extractor or connected with a solvent sulfolane storage pot. The solvent sulfolane is used circularly on the running device, the purifying of the solvent sulfolane is on-line purifying and reviving, so the equipment investment can be reduced, and the operation is easy. The sulfolane is firstly filtered to deprive the solid particles >1 mu m in the purification device of the utility model and then repassed chemical adsorption to the deprive acidic material and the polymer.
Description
Technical field
The utility model belongs to petrochemical industry, particularly the purification techniques of aromatic hydrocarbons extraction solvent sulfolane.
Background technology
The ethylene industry fast development of China in recent years, ethylene yield is increased to annual more than 5,000,000 tons, supporting with it also development thereupon of pyrolysis gasoline production aromatic hydrocarbons technology for 1,000,000 tons by the annual less than of the 1980s; The aromatic hydrocarbon product market requirement is constantly stable to be enlarged, and the aromatic device economic benefit is better always, and industrial scale constantly enlarges.Solvent extraction technology is adopted in China's aromatic hydrocarbons production at present substantially, and the aromatic hydrocarbons extraction solvent adopts tetramethylene sulfone mostly.The industrial sulfolane solvent that recycles for a long time is the acidic substance that solid particulate and degraded produce because of reasons such as system device, pipeline corrosion, solvent oxidation degraded cause the pollution of sulfolane solvent, principal pollutant.The sulfolane solvent that pollutes has brought a series of adverse influences for steady, the economical operation of device:
1), the pH value of solvent reduces.The acidic substance of generation make that the pH value of tetramethylene sulfone constantly reduces in the system because tetramethylene sulfone degrade in technological process, and acidic substance cause equipment corrosion, and corrosion product can further promote the degraded of tetramethylene sulfone again, and pH value is minimum can be arrived about 3.5.At present domestic generally the employing injected monoethanolamine to suppress the reduction of pH value, and not only monoethanolamine consumption increases, and effect is not very good.
2), system's corrosion aggravation.Because the degraded of tetramethylene sulfone, pH value constantly reduces, and seriously corrodeds such as system device, pipeline, valve cause the device leakage, influence the safety in production of the device cycle of operation and device.
3), equipment scaling stops up serious.The increase of equipment corrosion product and degrading solvent product, it is serious to cause the equipment installation instrument to stop up, and influences the normal operation of device.The solvent fouling of heat exchangers, the heat exchange effect reduces, and causes the solvent temperature height on the one hand, and the degraded of aggravation solvent influences choice of Solvent, influences quality product; Cause the stripping tower feeding temperature low on the other hand, the influence operation.Tower tray stops up, and causes extracting, inferior separating effect.The instrument demonstration is undesired, variable valve is easily stifled; Pump inlet strainer cleans frequent.
4), choice of Solvent decline.Solvent seriously polluted influences choice of Solvent, operational difficulty, unstable product quality.
5), the agent consumption raises.Solvent contamination, deterioration must increase the sulfolane solvent magnitude of recruitment on the one hand, keep the performance of solvent, must increase the monoethanolamine injection rate simultaneously, keep solvent PH value; During the seriously polluted operation that influences device, then must replenish new agent in a large number and replace, cause solvent consumption to raise significantly, production cost increases.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of refining plant of aromatic hydrocarbons extraction solvent sulfolane, pollutent such as the solid particulate in can the effective elimination solvent, acidic substance, and easy to operate, cost is low.
The refining plant of the utility model aromatic hydrocarbons extraction solvent sulfolane, the pipe connecting between it is characterized in that being reached by fresh feed pump, accurate filter, adsorption tanks is successively formed, and the fresh feed pump end connects feed-pipe, and the adsorption tanks end connects discharge nozzle.
The utility model does not influence the normal operation of aromatic solvent extraction plant, the discharge nozzle of the feed-pipe of fresh feed pump end and adsorption tanks end is connected solvent sulfolane and enters on the pipeline of the extraction tower in the aromatic solvent extraction plant, perhaps be connected (solvent enters the utility model device, turns back in the basin after the purifying treatment again) with the solvent sulfolane basin.On the device of operation, solvent sulfolane recycles, and what its purification was adopted is that in-line purification brings back to life, and can reduce facility investment like this, easily operation.Tetramethylene sulfone earlier by filtering and removing＞1 μ m solid particulate, removes acidic substance and polymkeric substance through chemisorption again in refining plant of the present utility model.Below describe in detail:
1) solid particulate removes
The solid particulate size-grade distribution is as follows in the sulfolane solvent that industry recycles for a long time:
＜1 μ m solid particulate 3～6%, 1～10 μ m solid particulate 30～50%,＞10 μ m solid particulates account for 40～65%, and the mechanical filter of the 25 μ m that the general industry device adopts can not remove the solid particle polluter in the sulfolane solvent at all effectively.By multiple comparison test and screening, determine preferred adopt to base oneself upon remove＞film filter of the solid particulate of 1 μ m.
2) acidic substance removes
The sulfolane solvent that industry recycles for a long time produces H under oxygen and high temperature
2SO
3Reach organic acidity materials such as sulfonic acid class, also supervene small amounts of sulfur dioxide, SO
2Carry out reversible reaction with unsaturated aldehyde again, form the extremely strong acid of corrodibility, it also decomposes under the distillation environment, can also produce polymkeric substance and acidic polymer (weak acid) again.
Removing of solvent middle acid substance and polymkeric substance adopts chemisorption to remove technology, after the material to multiple model specifications such as molecular sieve, gac, carclazyte, weak base resin, strong alkali resins has carried out various composite tests, final definite molecular sieve and strong alkali resin two-stage suction type of adopting, adsorb promptly earlier by molecular sieve adsorption, and then by strong alkali resin.Adsorption tanks can be composed in series by one or more.When adopting adsorption tanks, molecular sieve is loaded on the top in jar, bottom filling strong alkali resin; Also can be a canned molecular sieve, a canned strong alkali resin.According to the solvent quality situation, in order to improve adsorption effect, can be through twice or multiple adsorb.Can also mainly be decolouring according to circumstances again through one carclazyte absorption.The molecular sieve volume ratio is 10～30%, the strong alkali resin volume ratio is 50～70%, the carclazyte volume ratio is 5～20%.Molecular sieve is generally selected 3A molecular sieve or 5A molecular sieve for use.
Advantage of the present utility model:
Pollutents such as the solid particulate in the effective elimination solvent, acidic substance, the pH value of raising solvent slows down equipment corrosion, fouling, the extension fixture cycle of operation; Improve the performance of solvent, improve operation; Reduce solvent and monoethanolamine consumption; Reduce solvent regeneration tower working time, reduce plant energy consumption.
1) solid particulate removes
The solid removal rate 97.58% of laboratory evaluation＞1 μ m, full scale plant is used solid removal rate＞95% of reality＞1 μ m.
2) acidic substance removes
The decreasing ratio 90.34% of laboratory evaluation solvent middle acid substance and polymkeric substance, full scale plant are used decreasing ratio＞85% of actual acidic substance and polymkeric substance.
This technology has been carried out the industrial experiment application in A factory of Sinopec company first, has obtained obvious effects.
1), solvent quality
The solvent sulfolane outward appearance is a black, opaque before implementing, outward appearance colourity 10
#(Q/HCD004-2003), leave standstill a large amount of throw outs; Tetramethylene sulfone after the purification depickling technical finesse is light yellow, nothing precipitation, and outward appearance colourity has reached 2
#Standard.
2), solid removal
Solid particulate is based on corrosion product and degraded, polymerisate, and the long-time post precipitation of sample is assembled the bottom, and is burnt shape, measure through laser particle size analyzer, before the purification, burnt attitude solid content 1.20%, after the purification, burnt attitude solid content＜500ppm, decreasing ratio＞95%.
3), solvent PH value changes
Solvent PH value purifies depickling processing back solvent PH value and reaches 7.9 5～6 before the purifying treatment, illustrates that the solvent middle acid substance is by effective elimination.Purify back 2 months and need not add 5 tons of monoethanolamine, the minimizings in every month of solvent sulfolane consumption.
4), other indexs
Tetramethylene sulfone after the purification, its colloid, purity, tetramethylene sulfone olefin(e) centent, moisture content, ash, total sulfur, boiling range are compared the trend that improvement is arranged before purifying.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is an aromatic solvent extraction plant synoptic diagram.
Among the figure: 1 fresh feed pump, 2 accurate filters, 3 one-level adsorption tanks, 4 secondary absorption jars, 5 pipe connectings, 6 feed-pipes, 7 discharge nozzles, 8 extraction towers, 9 stripping towers, 10 recovery towers, 11 device 12 pumps 13 tetramethylene sulfone basins of the present utility model
Embodiment
As Fig. 1, device of the present utility model is made up of fresh feed pump 1, accurate filter 2, one-level adsorption tanks 3, secondary absorption jar 4.Accurate filter is a film filter, all respectively filling molecular sieve in top in one-level adsorption tanks 3 and the secondary absorption jar 4, middle part filling strong alkali resin, bottom filling carclazyte, the volume ratio of molecular sieve are 10～30%, the volume ratio of strong alkali resin is 50～70%, the volume ratio of carclazyte is 5～20%.Perhaps adsorption tanks are formed by three, and each jar is adorned molecular sieve, strong alkali resin, carclazyte successively respectively, and the volume ratio of jar is according to the volume ratio of dress sorbent material.Molecular sieve is 3A molecular sieve or 5A molecular sieve.
Fig. 2 has set up device 11 of the present utility model on original aromatic solvent extraction plant.Stock oil (containing aromatic hydrocarbons) enters extraction tower 8 middle parts, with reverse contact of solvent sulfolane that cat head enters, finishes extractive process, and cat head goes out to raffinate oil, rich solvent admission stripper 9 at the bottom of the tower, and a small amount of non-aromatics that flash overhead goes out is returned the extraction tower bottom as returning washing lotion; Rich solvent advances recovery tower 10 at the bottom of the tower, and the realization solvent separates with aromatic hydrocarbons, and cat head goes out aromatic hydrocarbons, and lean solvent is finished solvent cycle to the extraction tower top at the bottom of the tower.Refining plant of the present utility model is connected lean solvent and advances on the pipeline of extraction tower 8, and extraction is returned after handling before lean solvent advances extraction tower 8.Solvent is elder generation's filtering and removing＞1 μ m solid particulate in accurate filter in the utility model, removes acidic substance and polymkeric substance through adsorption tanks by chemisorption again.
Claims (3)
1, the refining plant of aromatic hydrocarbons extraction solvent sulfolane, the pipe connecting between it is characterized in that being reached by fresh feed pump, accurate filter, adsorption tanks is successively formed, and the fresh feed pump end connects feed-pipe, and the adsorption tanks end connects discharge nozzle
2, refining plant according to claim 1 is characterized in that described accurate filter is a film filter.
3, refining plant according to claim 1 is characterized in that described adsorption tanks are composed in series by one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420051766 CN2709446Y (en) | 2004-06-21 | 2004-06-21 | Purification device aromatics extractant sulfolane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420051766 CN2709446Y (en) | 2004-06-21 | 2004-06-21 | Purification device aromatics extractant sulfolane |
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| Publication Number | Publication Date |
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| CN2709446Y true CN2709446Y (en) | 2005-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420051766 Expired - Fee Related CN2709446Y (en) | 2004-06-21 | 2004-06-21 | Purification device aromatics extractant sulfolane |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731472A (en) * | 2012-06-28 | 2012-10-17 | 中国石油化工股份有限公司 | Apparatus for reducing arene extraction solvent sulfolane, and application thereof |
| CN104178205A (en) * | 2014-07-18 | 2014-12-03 | 中国石油化工股份有限公司 | Industrial plant for lowering operating cost of aromatic extraction system and application method thereof |
| CN110604967A (en) * | 2019-10-15 | 2019-12-24 | 北京宝晨能源工程技术有限公司 | Sulfolane regeneration device and method |
| US10538430B2 (en) * | 2015-12-09 | 2020-01-21 | Chevron Phillips Chemical Company Lp | System and method for containing an emission of sulfur trioxide |
| CN112920162A (en) * | 2021-01-29 | 2021-06-08 | 临涣焦化股份有限公司 | Solvent regenerating unit |
| CN114191882A (en) * | 2021-11-16 | 2022-03-18 | 北方华锦化学工业股份有限公司 | Effective purification method for aromatic hydrocarbon device solvent system |
-
2004
- 2004-06-21 CN CN 200420051766 patent/CN2709446Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731472A (en) * | 2012-06-28 | 2012-10-17 | 中国石油化工股份有限公司 | Apparatus for reducing arene extraction solvent sulfolane, and application thereof |
| CN104178205A (en) * | 2014-07-18 | 2014-12-03 | 中国石油化工股份有限公司 | Industrial plant for lowering operating cost of aromatic extraction system and application method thereof |
| CN104178205B (en) * | 2014-07-18 | 2016-01-20 | 中国石油化工股份有限公司 | Reduce full scale plant and the application method of Aromatics Extractive Project system operation cost |
| US10538430B2 (en) * | 2015-12-09 | 2020-01-21 | Chevron Phillips Chemical Company Lp | System and method for containing an emission of sulfur trioxide |
| CN110604967A (en) * | 2019-10-15 | 2019-12-24 | 北京宝晨能源工程技术有限公司 | Sulfolane regeneration device and method |
| CN112920162A (en) * | 2021-01-29 | 2021-06-08 | 临涣焦化股份有限公司 | Solvent regenerating unit |
| CN114191882A (en) * | 2021-11-16 | 2022-03-18 | 北方华锦化学工业股份有限公司 | Effective purification method for aromatic hydrocarbon device solvent system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |