CN1966428A - Gas field methanol sewage disposal process - Google Patents
Gas field methanol sewage disposal process Download PDFInfo
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- CN1966428A CN1966428A CN 200610104738 CN200610104738A CN1966428A CN 1966428 A CN1966428 A CN 1966428A CN 200610104738 CN200610104738 CN 200610104738 CN 200610104738 A CN200610104738 A CN 200610104738A CN 1966428 A CN1966428 A CN 1966428A
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Abstract
The invention relates to the water treatment technology, especially a gas field methanol sewage treatment technology which at least includes pretreating technology, methanol reclaiming technology and sewage back-flowing technology. The characteristic of the invention: after removing oil, adjusting Ph value, oxidizing to remove iron and flocculating/precipitating, separate the methanol from the sewage in the methanol-reclaiming device the core of which is dephlegmation tower, the treated water goes back to stratum. The invention finally managed to reclaim the methanol with zero release of waste liquids. The methanol-reclaiming dephlegmation tower adopts ''filling material + sieve pore (or oblique aperture)'' and ''floating valve + sieve pore (or oblique aperture)'' complex tower model to solve many problems such as obstructing and the adaptability of the dephlegmation tower to the large change of methanol content in different sewages.
Description
Technical field
The present invention relates to sewage treatment process, particularly gas field methanol sewage disposal process.
Background technology
In the gas exploitation course, need from gas well mouth to flow line inject methyl alcohol, to suppress the generation of gas hydrate.Because of most of methyl alcohol and the pipeline free-water that injects dissolves each other, and separate with Sweet natural gas, produced gas field methyl alcohol sewage (being equipped with methanol tank, methyl alcohol sewage jar and many alchol-injection pumps in each gas gathering station) thus in gas gathering station.
Methyl alcohol belongs to the moderate toxicity material, gas field methyl alcohol sewage " many, wide, the complicated component of point ".Therefore, research and exploitation " gas field methanol sewage disposal process technology " have two purposes:
1, research and development is fit to " the methanol sewage treatment technology technology " that production characteristics in gas field are used, and accomplishes " zero release ", is beneficial to environment protection.
2, reclaim methyl alcohol and recycling to greatest extent, reduce the Natural gas extraction cost.
Methyl alcohol sewage characteristics in gas field are methanol content varys within wide limits in the sewage, can change between 20%～60% generally speaking.Condensation oil composition difference in the sewage is arranged again, as the gas field of pacifying the border region, gas field, big ox ground, Chang Bei gas field condensate oil are that limpid look is substantially free of heavy constituent and gas field, Yulin condensate oil is light brown, heavy constituent are remarkable, and the component of oil is serious to the influence on system operation of process unit sometimes.
Used chemical agent during the gas field development that has, be difficult to grasp, and some chemical agent also is quite serious to the influence of methanol sewage treatment technology only according to conventional water quality analysis.
Generally speaking gas field sewage has the characteristics of " four high one is low " (high turbidity, high salinity, highly corrosive, high Fe contained, low pH value).Though had many experiences can be for reference to the processing of gas field sewage, gas field methyl alcohol sewage disposal need solve equipment, pipeline corrosion, the rectifying tower filler stops up, problems such as heat-exchange equipment fouling.
Summary of the invention
The purpose of this invention is to provide a kind of gas field methanol sewage disposal process, so that realize the pre-treatment of gas field sewage " four high is low " (high turbidity, high salinity, highly corrosive, high Fe contained, low pH value) and solve the adjustment that rectifying tower changes significantly to the raw water methanol content.Final Methanol Recovery and the separating methanol waste water zero emission realized.
The object of the present invention is achieved like this, gas field methanol sewage disposal process, which comprises at least pretreatment technology, Methanol Recovery technology and produced-water reinjection technology, it is characterized in that: gas field sewage is placed on behind pretreatment technology in the coagulant precipitation jar 3, after the feed liquid of coagulant precipitation jar 3 is pressurizeed by pump 11, enter again and preheat interchanger 4,8 bottom water outlets preheat 40～65 ℃ through rectifying tower, filter the incoming stock heating heat exchanger 12 in back through filter 5, through being steam heated to bubble point, enter rectifying tower 8 by the import 803 at rectifying tower 8 middle parts; Liquid phase flows and the secondary steam counter current contact that moves from bottom to top from top to bottom in the rectifying tower 8, finishes heat and mass transfer process; Water at the bottom of inflow rectifying tower 8 towers remains on 105～110 ℃, enter kettle-type reboiler 10 by liquid level difference, through steam heating partly vaporize return rectifying tower 8 towers at the bottom of, part is as rectifying tower 8 bottom products---separating methanol waste water, extract out with pump 17, with enter water tank 7 after the feed liquid heat exchange to 40 ℃, reinjection into reservoir then; 65.8 ℃ of methanol steams of cat head enter backflow storage tank 9 through condenser 13 full condensations, then extract out with pump 16, and the cat head of a part of backflow rectifying tower 8, a part is cooled to less than 40 ℃ through cooling heat exchanger 15 as product and enters methanol product storage tank 6.
Described gas field sewage is by gas field sewage being added alkali 18NaOH, oxygenant 19H respectively through pretreatment technology
2O
2, and coagulating agent 202B carry out the sewage pre-treatment.
The optimum amount of described oxygenant 19 is that first pH value with gas field sewage is adjusted to 8.0, adds coagulating agent 20, respectively at oxygenant 19H
2O
2Different amounts is measured the transmittance of handling back sewage down, and transmittance is oxygenant 19H greater than 85% o'clock dosage
2O
2Best dosage.
The optimum amount of described coagulating agent 20 is that first pH value with gas field sewage is adjusted to 8.0, add oxygenant 19, measure the transmittance of handling back sewage respectively under different coagulants 202B dosage, transmittance is coagulating agent 20 best dosages greater than 85% o'clock dosage.
Described rectifying tower 8 stripping sections adopt plank frame, and feeder screen orifice plate 804, sieve tray 805 are sieve tray or counter direction jet trays; Rectifying section gravity valve tray 802 adopts valve tray or counter direction jet trays or metal sheet ripple packing.
Described rectifying tower 8 design variables: between tower diameter φ 800～φ 2000mm, stripping section comprises the column plate more than 2 grades, and total column plate is 29～33 layers, and the distance of sieve tray 805 is between 300～600mm; When rectifying section filler 801 adopts valve tray or counter direction jet trays, then establish 16 layers of column plate altogether, distance is between 300～600mm; Rectifying section filler 801 adopts the metal sheet ripple packing, and then filler 801 highly is 2000mm, establishes gravity valve tray 802 one decks in import 803 and 801 of fillers.
Described rectifying section is the metal sheet ripple packing, then establishes gravity valve tray 802 one decks at feed plate and 801 of fillers, and feed plate and gravity valve tray 802 distances are 1000mm, and gravity valve tray 802 is 1000mm with filler 801 distances.
Described feeder screen orifice plate 804, sieve tray 805 are sieve tray or slant-hole tray.
Described sieve tray 805 apertures are φ 12mm.
Characteristics of the present invention are: by pretreatment technology, Methanol Recovery technology and produced-water reinjection technology step-by-step processing gas field sewage, realize Methanol Recovery, sewage purification and zero release.By pre-treatment, thereby the machine in the sewage is assorted, oil content, total iron almost all are removed the smooth running of having guaranteed follow-up Methanol Recovery process unit rectifying tower; Methanol Recovery technology mainly adopts rectifying tower to finish Methanol Recovery; Separating methanol waste water passes through the high pressure water-injection pump re-injection in the sealing ring layer isolated with underground water source.
Rectifying section adopts valve tray or counter direction jet trays or metal sheet ripple packing metal sheet ripple packing in the design of rectifying tower, and the profit reduction and reserving section adopts sieve tray or counter direction jet trays, and makes tray spacing 300～600mm.Rectifying section is established gravity valve tray one deck as adopting then packed height 2000mm of metal sheet ripple packing between feed plate and filler, so more adapt to the variation that feed liquid profit reduction and reserving section adopts methanol concentration.Because methanol content is by 20% to 60% in the gas-field water, its rangeability is big to be that general chemical industry rectifying is difficult to run into.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing.
Fig. 1 is embodiment of the invention technical process;
Fig. 2 is rectifying tower local size figure.
Among the figure: 1, remove oil tank; 2, retort; 3, coagulant precipitation jar; 4, preheat interchanger; 5, strainer; 6, storage tank; 7, water tank; 8, rectifying tower; 9, backflow storage tank; 10, kettle-type reboiler; 11, pump; 12, raw material heating heat exchanger; 13, condenser; 14, sludge drying pond; 15, cooling heat exchanger; 16, pump; 17, pump; 18, alkali; 19, oxygenant; 20, coagulating agent; 801, filler; 802, gravity valve tray; 803, import; 804, feeder screen orifice plate; 805, sieve tray.
Embodiment
As shown in Figure 1, entering the gas field sewage that removes oil tank 1 is placed on behind pretreatment technology in the coagulant precipitation jar 3, after the feed liquid of coagulant precipitation jar 3 is filtered through filter 5 by pump 11 pressurizations, enter again and preheat interchanger 4, preheat 40～65 ℃ of incoming stock heating heat exchangers 12 by water outlet at the bottom of rectifying tower 8 towers, through being steam heated to 90 ℃ of boiling points, enter rectifying tower 8 by the import 803 in the middle part of the rectifying tower; Liquid phase flows and the secondary steam counter current contact that moves from bottom to top from top to bottom in the rectifying tower 8, finishes heat and mass transfer process; Water at the bottom of inflow rectifying tower 8 towers remains on 105～110 ℃, enter kettle-type reboiler 10 by liquid level difference, through steam heating partly vaporize return rectifying tower 8 towers at the bottom of, part is extracted out with pump 17 as rectifying tower 8 bottom products, after about 40 ℃, enter water tank 7 with the feed liquid heat exchange, then reinjection into reservoir; Cat head methanol steam (65.8 ℃) is then extracted out with pump 16 through condenser 13 full condensations and the cold excessively backflow storage tank 9 that enters, the cat head of a part of backflow rectifying tower 8, and a part is cooled to less than 40 ℃ through cooling heat exchanger 15 as product and enters methanol product storage tank 6.
Rectifying tower 8 stripping sections among the present invention adopt sieve tray (aperture φ 12mm) or counter direction jet trays; Rectifying section adopts slant-hole tray or valve tray or metal sheet ripple packing to add one deck gravity valve tray 802; What select for use as rectifying section is the metal sheet ripple packing, then between feed plate and filler, establish gravity valve tray 802 one decks, feed plate and gravity valve tray 802 distances are 1000mm, and gravity valve tray 802 is 1000mm with the filler distance, so more adapts to the variation of feed liquid methanol concentration.Because methanol content is by 20% to 60% in the gas-field water, its rangeability is big to be that general chemical industry rectifying is difficult to run into, " filler+sieve aperture (or inclined hole) " reaches compound towers such as " float valve+sieve aperture (or inclined holes) ", can improve the turndown ratio of rectifying section, adapt to the situation of feed liquid methanol content wide fluctuations more.
Although most suspended impurities under the normal temperature state are removed by pretreatment technology, yet some colloidal impurity is separated out adding can take off surely under the thermal conditions.Therefore, stop up in the tower by the decision of sewage character and concentrate on below the stripping section opening for feed, select the sieve aperture or the inclined hole of antipollution, easy cleaning so select rectifying tower profit reduction and reserving section, and " filler+sieve aperture (or inclined hole) " reaches compound towers such as " float valve+sieve aperture (or inclined holes) ", can improve the turndown ratio of rectifying section, adapt to the operating mode of feed liquid methanol content wide fluctuations more.
In addition, for " filler+sieve aperture (or inclined hole) " compound tower, for avoiding because of misoperation, the feed plate liquid foam entrainment is seriously brought suspended impurity into filler, and then obstruction filler, so this type tower is established gravity valve tray 802 one decks at feed plate and 801 of fillers, suitably increase the spacing of described feed plate and valve tray and gravity valve tray 802 and filler 801 bottoms simultaneously, it is suitable to facts have proved that this spacing all is set to 1000mm.
Rectifying tower 8 adopts wide aperture sieve aperture tower can satisfy the requirement of gas field methyl alcohol sewage disposal, with the wide aperture sieve-tray tower be core " single tower distillation " technology, and stablize the automatic control scheme that tower top temperature is a core to regulate quantity of reflux, when guaranteeing cat head, bottom product quality, can adapt to the influence that charging contains alcohol amount wide fluctuations; Wide aperture sieve-tray tower contamination resistance is strong, easy cleaning, and easily maintenance is fit to handle gas field methyl alcohol sewage.
Stop up in the tower by the decision of sewage character and concentrate on below the stripping section opening for feed, so select " filler+sieve aperture (or inclined hole) " to reach compound towers such as " float valve+sieve aperture (or inclined holes) ", can improve the turndown ratio of rectifying section, adapt to the operating mode of feed liquid methanol content wide fluctuations more.Simultaneously, select the slant-hole tray of efficient, antipollution, easy cleaning in the turndown ratio that improves stripping section, can improve output of column.
In addition, for adapting to the variation of gas field sewage methanol content, packing tower has been selected in the design of Methanol Recovery device for use.
As shown in Figure 1, in order to solve the etching problem of gas field sewage, in the gas field sewage preprocessing process, must remove dissolved CO in the decontaminated water
2And H
2S gas, raising pH value.Studies show that as long as add suitable pH value conditioning agent, both can reach the purpose that improves sewage PH value, can remove dissolved CO in the decontaminated water again
2And H
2S.
PH value conditioning agent commonly used has alkali 18NaOH and Na
2CO
3, because the Ca in the methanol recovery system sewage
2+, Mg
2+Ion content is very high, uses Na
2CO
3When regulating pH value, can consume a large amount of Na
2CO
3, and produce a large amount of CaCO
3Precipitation increases sludge quantity greatly, and just can not have the problems referred to above when regulating pH value with alkali 18NaOH.So in methanol recovery system water quality and preprocessing process, use alkali 18NaOH as the pH value conditioning agent.By to alcoholic gas field sewage burn into fouling principle and analysis of Influential Factors thereof, and draw: the pH value of alcoholic gas field sewage is adjusted between 7.5～8.5, can reaches best anticorrosion, scale inhibition effect in conjunction with a large amount of experiments.
Gas field methyl alcohol sewage among Fig. 1 is placed on except that in the oil tank 1, the gas field methyl alcohol sewage that removes oil tank 1 adds oxygenant 19, oxygenant 19 is handled through retort 2 mixing, and then add coagulating agent 20 and finish the pre-treatment of gas field methyl alcohol sewage and enter coagulant precipitation jar 3, enter sludge drying pond 14 to the mud of coagulant precipitation jar 3 bottoms.
Will remove the assorted and oil in water emulsion of machine in the decontaminated water, the most frequently used and effective means is that chemical coagulation is handled.Owing to contain a large amount of methyl alcohol and Fe in the alcoholic gas field sewage
2+, when using conventional Coagulation with Treatment, can't remove the Fe in the decontaminated water
2+, make the coagulating treatment effect undesirable.Find by theoretical analysis and test, under weak basic condition, Fe
3+Be the flocculation agent of excellent property, and contain a large amount of Fe in the sewage
2+, Fe
2+Under alkaline condition, be easy to be oxidized to Fe
3+So in coagulating treatment, direct oxidizer 19 is with the Fe in the sewage under alkaline condition
2+Be oxidized to Fe
3+, with Fe
3+As inorganic flocculating agent.For further enhanced flocculation effect, add suitable organic cation coagulating agent 2B again, can reach good coagulation effect.
In order to determine the optimum amount of oxygenant 19, the pH value with gas field sewage is adjusted to 8.0 earlier, adds coagulating agent 20, respectively at different oxygenant 19 (H
2O
2) the following transmittance of handling back sewage of measuring of consumption, transmittance is oxygenant 19H greater than 85% o'clock dosage
2O
2Best dosage.
In order to determine the optimum amount of coagulating agent 20, the pH value with gas field sewage is adjusted to 8.0 earlier, adds oxygenant 19H
2O
2, under different coagulants 20 (2B) dosage, measure the transmittance of handling back sewage respectively, transmittance is the best dosage of organic coagulating agent 20 (2B) greater than 85% o'clock dosage.
By a large amount of tests, when oxygenant 19 is H
2O
2, treatment effect the best when coagulating agent 20 is organic cation coagulating agent 2B.In order to determine alkali 18 (NaOH), oxygenant 19 (H in the sewage containing methanol preprocessing process
2O
2) and the sewage reaction times, regulate PH=8, oxygenant 19 dosages are 0.08ml/L, coagulating agent 20 (2B) is that 1ml/L measures the transmittance of handling back sewage respectively under the differential responses time.
For the influence of determining that PH handles sewage containing methanol in the sewage containing methanol preprocessing process, regulate PH=8.0, oxygenant 19 dosages are 0.08mL/L, and coagulating agent 202B is 1ml/L, in 0.5 hour reaction times, under different PH, measure the transmittance of handling back sewage respectively.
As shown in Figure 2, described rectifying tower 8 design variables: between tower diameter φ 800～φ 2000mm, stripping section comprises the column plate (29 layers) more than 2 grades at least, the spacing of sieve tray 805 between 300～600mm, the aperture φ 12 of sieve tray 805; Rectifying section metal sheet ripple is provided with filler 801, filler 801 height 2000mm; Establish gravity valve tray 802 one decks in import 803 and 801 of fillers.Feeder screen orifice plate 804 and with gravity valve tray 802 distance be 1000mm.Valve tray 802 is 1000mm with filler 801 distances.
The described profit reduction and reserving section of heating up in a steamer sieve tray 805 can be sieve tray or slant-hole tray.No matter be to select for use its design requirements of which kind of column plate basic identical.
Claims (9)
1, gas field methanol sewage disposal process, which comprises at least pretreatment technology, Methanol Recovery technology and produced-water reinjection technology, it is characterized in that: gas field sewage is placed on behind pretreatment technology in the coagulant precipitation jar (3), after the feed liquid of coagulant precipitation jar (3) is pressurizeed by pump (11), enter again and preheat interchanger (4), the bottom water outlet preheats 40～65 ℃ through rectifying tower (8), filter back incoming stock heating heat exchanger (12) through filter (5), through being steam heated to bubble point, enter rectifying tower (8) by the import (803) in the middle part of the rectifying tower (8); Liquid phase flows and the secondary steam counter current contact that moves from bottom to top from top to bottom in the rectifying tower 8, finishes heat and mass transfer process; Water at the bottom of inflow rectifying tower (8) tower remains on 105～110 ℃, enter kettle-type reboiler (10) by liquid level difference, through steam heating partly vaporize return rectifying tower (8) tower at the bottom of, part is as rectifying tower (8) bottom product---separating methanol waste water, extract out with pump (17), with enter water tank (7) after the feed liquid heat exchange to 40 ℃, reinjection into reservoir then; 65.8 ℃ of methanol steams of cat head enter backflow storage tank (9) through the full condensation of condenser (13), then use pump (16) to extract out, the cat head of part backflow rectifying tower (8), a part is cooled to less than 40 ℃ through cooling heat exchanger (15) as product and enters methanol product storage tank (6).
2, gas field methanol sewage disposal process according to claim 1 is characterized in that: described gas field sewage is by gas field sewage being added alkali (18) NaOH, oxygenant (19) H respectively through pretreatment technology
2O
2, and coagulating agent (20) 2B carry out the sewage pre-treatment.
3, gas field methanol sewage disposal process according to claim 2 is characterized in that: the optimum amount of described oxygenant (19) is that first pH value with gas field sewage is adjusted to 8.0, adds organic coagulating agent (20), respectively at oxygenant (19) H
2O
2Different amounts is measured the transmittance of handling back sewage down, and transmittance is oxygenant (19) H greater than 85% o'clock dosage
2O
2Best dosage.
4, gas field methanol sewage disposal process according to claim 2, it is characterized in that: the optimum amount of described coagulating agent (20) is that first pH value with gas field sewage is adjusted to 8.0, add oxygenant (19), measure the transmittance of handling back sewage respectively under the organic coagulating agent of difference (20) 2B dosage, transmittance is the best dosage of coagulating agent (20) greater than 85% o'clock dosage.
5, gas field methanol sewage disposal process according to claim 1 is characterized in that: described rectifying tower (8) rectifying section adopts plank frame, and feeder screen orifice plate (804), sieve tray (805) are sieve tray or counter direction jet trays; Rectifying section gravity valve tray (802) adopts valve tray or counter direction jet trays or metal sheet ripple packing.
6, gas field methanol sewage disposal process according to claim 1, it is characterized in that: described rectifying tower (8) design variable: between tower diameter φ 800～φ 2000mm, stripping section comprises the column plate more than 2 grades, total column plate is 29～33 layers, the distance of sieve tray (805) is between 300～600mm; When rectifying section filler (801) adopts valve tray or counter direction jet trays, then establish 16 layers of column plate altogether, distance is between 300～600mm; Rectifying section filler (801) adopts the metal sheet ripple packing, and then filler (801) highly is 2000mm, establishes gravity valve tray (802) one deck between import (803) and filler (801).
7, gas field methanol sewage disposal process according to claim 5, it is characterized in that: described rectifying section is the metal sheet ripple packing, then between feed plate and filler (801), establish gravity valve tray (802) one deck, feed plate and gravity valve tray (802) distance are 1000mm, and gravity valve tray (802) is 1000mm with filler (801) distance.
8, gas field methanol sewage disposal process according to claim 5 is characterized in that: described feeder screen orifice plate (804), sieve tray (805) are sieve tray or slant-hole tray.
9, gas field methanol sewage disposal process according to claim 5 is characterized in that: described sieve tray (805) aperture is φ 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101047388A CN100486920C (en) | 2006-10-16 | 2006-10-16 | Gas field methanol sewage disposal process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101047388A CN100486920C (en) | 2006-10-16 | 2006-10-16 | Gas field methanol sewage disposal process |
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| Publication Number | Publication Date |
|---|---|
| CN1966428A true CN1966428A (en) | 2007-05-23 |
| CN100486920C CN100486920C (en) | 2009-05-13 |
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ID=38075446
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343994B (en) * | 2007-07-12 | 2011-11-09 | 北京迪威尔石油天然气技术开发有限公司 | Oil, gas, water and methanol four-phase separator |
| CN102442744A (en) * | 2010-09-30 | 2012-05-09 | 中国石油化工股份有限公司 | Treatment method of high-concentration process waste water during methanol-to-olefin process |
| CN104109079A (en) * | 2014-07-11 | 2014-10-22 | 西安长庆科技工程有限责任公司 | System and method for recovering methanol from gas field wastewater |
| CN104528988A (en) * | 2014-12-15 | 2015-04-22 | 中国石油天然气股份有限公司 | Gas field oil-containing alcohol-containing sewage pretreatment system and method |
| CN104609634A (en) * | 2015-02-25 | 2015-05-13 | 西安百特瑞化工工程有限公司 | Method and apparatus for regenerating oil and gas field waste methanol |
| CN106866368A (en) * | 2017-01-20 | 2017-06-20 | 常州大学 | Alcoholic gas field sewage methanol recovery device and technique based on air- extraction and vacuum membrane distillation method |
| CN107226579A (en) * | 2016-03-24 | 2017-10-03 | 福建省三净环保科技有限公司 | A kind of sewage disposal device |
| CN107261540A (en) * | 2017-07-04 | 2017-10-20 | 河南神马尼龙化工有限责任公司 | A kind of cyclohexanol Mead-Bauer recovery system |
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| CN108622961A (en) * | 2014-09-30 | 2018-10-09 | 北京合众有益科技有限责任公司 | A kind of gas field sewage method for innocent treatment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083802A (en) * | 1993-07-06 | 1994-03-16 | 兴城市化工总厂 | A kind of methanol sewage treatment technology |
| FR2822839B1 (en) * | 2001-03-29 | 2003-05-16 | Inst Francais Du Petrole | IMPROVED PROCESS FOR DEHYDRATION AND DEGAZOLINATION OF A WET NATURAL GAS |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343994B (en) * | 2007-07-12 | 2011-11-09 | 北京迪威尔石油天然气技术开发有限公司 | Oil, gas, water and methanol four-phase separator |
| CN102442744A (en) * | 2010-09-30 | 2012-05-09 | 中国石油化工股份有限公司 | Treatment method of high-concentration process waste water during methanol-to-olefin process |
| CN102442744B (en) * | 2010-09-30 | 2013-07-03 | 中国石油化工股份有限公司 | Treatment method of high-concentration process waste water during methanol-to-olefin process |
| CN104109079A (en) * | 2014-07-11 | 2014-10-22 | 西安长庆科技工程有限责任公司 | System and method for recovering methanol from gas field wastewater |
| CN104528988A (en) * | 2014-12-15 | 2015-04-22 | 中国石油天然气股份有限公司 | Gas field oil-containing alcohol-containing sewage pretreatment system and method |
| CN104609634A (en) * | 2015-02-25 | 2015-05-13 | 西安百特瑞化工工程有限公司 | Method and apparatus for regenerating oil and gas field waste methanol |
| CN107226579A (en) * | 2016-03-24 | 2017-10-03 | 福建省三净环保科技有限公司 | A kind of sewage disposal device |
| CN106866368A (en) * | 2017-01-20 | 2017-06-20 | 常州大学 | Alcoholic gas field sewage methanol recovery device and technique based on air- extraction and vacuum membrane distillation method |
| CN106866368B (en) * | 2017-01-20 | 2020-04-28 | 常州大学 | Gas field alcohol-containing sewage methanol recovery device and process based on gas stripping method and vacuum membrane distillation method |
| CN107261540A (en) * | 2017-07-04 | 2017-10-20 | 河南神马尼龙化工有限责任公司 | A kind of cyclohexanol Mead-Bauer recovery system |
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|---|---|
| CN100486920C (en) | 2009-05-13 |
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