CN101139118A - Technique for processing wastewater containing methanol and dimethyl ether - Google Patents
Technique for processing wastewater containing methanol and dimethyl ether Download PDFInfo
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- CN101139118A CN101139118A CNA200710054988XA CN200710054988A CN101139118A CN 101139118 A CN101139118 A CN 101139118A CN A200710054988X A CNA200710054988X A CN A200710054988XA CN 200710054988 A CN200710054988 A CN 200710054988A CN 101139118 A CN101139118 A CN 101139118A
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Abstract
The present invention discloses a wastewater treatment technics containing methanol and dimethyl ether and solves the problem that the wastewater produced by MTO device can not meet the need of the water inlet quality of wastewater treatment plant. The technics of the present invention includes that the wastewater containing methanol and dimethyl ether exchanges heat with the purified water in the bottom of a stripping tower after pressuring and enters the stripping tower. The gas mixture of methanol, etc., generated at the top of the stripping enters into a reflux drum after heat exchange. Part of the methanol gas return to the top of the stripping tower as reflux and the other part is sent to the outside of the device or as the material of MTO device. The bottom of the methanol stripping tower generates purified water and is sent to the outside of the device after exchanging heat with the wastewater containing methanol and dimethyl ether. The total content of methanol and dimethyl ether in the purified water acquired after treated by the technics of the present invention is less than or equal to 100ppm and the purified water can meet the need of the water inlet quality of wastewater treatment plant.
Description
Technical field
The invention belongs to sewage treatment area.Be particularly related to a kind of sewage treatment process that contains methyl alcohol and dme.
Background technology
Commercial run such as refining of petroleum, petrochemical complex tends to produce sewage, as not handling contaminate environment seriously in good time, and makes the resource loss that can effectively utilize.Produce alkene (MTO) technology by coal or natural gas via methyl alcohol and be in the technological development forward position in the world, have significantly competition potential.Under the higher situation of present oil price, be about to step into the industrial applications stage by coal or natural gas via preparing light olefins from methanol in the world.Owing to contain objectionable impuritiess such as small amount of methanol toxic substance and dme in the sewage that preparing low carbon olefinic hydrocarbon with methanol device (hereinafter to be referred as the MTO device) produces, if this sewage is not carried out pre-treatment, handle and directly be discharged to the sewage-farm, then can not satisfy sewage-farm feedwater quality requirement, can not guarantee that the normal operation in sewage-farm and final sewage of discharging outside the factory meet the requirements of the standard.All can be used as the raw material of preparing low carbon olefinic hydrocarbon with methanol again because of methyl alcohol and dme,, can reclaim, then can turn harm into good, save the raw material of producing low-carbon alkene these two kinds of materials in the sewage if when disposing of sewage.
CN1508083A discloses a kind of technology and device that contains the methanol condensed water handling reclamation, its concrete grammar is: turn to main method with biological contact oxidation this water of condensation is handled, under aerobic condition with waste water in a small amount of organic matter degradation such as methyl alcohol, processed water of condensation uses through can be used as water of productive use after the solid-liquid separation.The bio-contact oxidation treat effluent also can utilize ozone to carry out further oxidation, makes dissolved organic matter residual in the water and microorganism secretion thing obtain decomposing, and formation can be by the organic acid of follow-up ion remaval system removal.After a series of processing such as bio-contact oxidation, ozone oxidation and ion remaval, water of condensation can be used as deionized water and obtains reuse.But this technology can not be handled the sewage that contains materials such as methyl alcohol and dme simultaneously, also the document announcement of not finding relevant this kind waste disposal plant at present.
Summary of the invention
The sewage that The present invention be directed to the generation of MTO device does not satisfy the requirement of sewage-farm feedwater quality, and a kind of technology that the sewage that contains methyl alcohol and dme is handled is provided.Use that methyl alcohol and two kinds of material gross weights of dme content are not more than 100ppm in the purifying waste water of obtaining after the art breading of the present invention, can satisfy sewage-farm feedwater quality requirement, the recycling of implement device process water.
Technical scheme of the present invention: a kind of sewage treatment process that contains methyl alcohol and dme, its processing step is: the sewage that contains methyl alcohol and dme, the pressurization back and the heat exchange of purifying waste water at the bottom of the stripping Tata, enter stripping tower then, the gaseous mixture such as methyl alcohol that the stripping tower cat head produces enter return tank after heat exchange, a part is returned the stripping tower cat head as backflow, and it is outer or as the raw material of MTO device that another part is delivered to device; Go out to purify waste water at the bottom of the stripping Tata, and deliver to outside the device after the sewage heat exchange that contains methyl alcohol and dme.Wherein stripping tower cat head working pressure is 0.05～1.2MPa, is preferably 0.1～0.6Mpa; The stripping tower column bottom temperature is 90 ℃～190 ℃, is preferably 110～165 ℃; The return tank service temperature is 20～100 ℃, is preferably 35～60 ℃; Reflux ratio is 1～50.
Further aspect of the present invention is to heat stripping with 0.2～2.0MPa steam by reboiler at the bottom of the stripping Tata.
Stripping tower of the present invention is divided into two sections, cat head is a rectifying section to feed entrance, and feed entrance is a stripping section at the bottom of tower, and stripping tower has 40～70 theoretical stages, its opening for feed is opened from the 10-35 piece theoretical stage of cat head to the tower truth of a matter, preferentially at 13-20 piece theoretical stage place.
The sewage treatment process that contains methyl alcohol and dme of the present invention is specially adapted to handle the sewage that converting methanol to prepare low carbon olefin (MTO) device produces.
The effect that the present invention contains the sewage treatment process of methyl alcohol and dme is:
A. technology of the present invention can be handled the sewage that the MTO device produces, obtain after treatment purify waste water in methyl alcohol and two kinds of material gross weights of dme content be not more than 100ppm.
B. technology of the present invention can reclaim environmentally harmful materials such as methyl alcohol in the sewage, dme, makes its raw material as preparing low carbon olefinic hydrocarbon with methanol return the MTO device.
C. the flow process of process using of the present invention is simpler, and facility investment is less, smooth operation.
Describe the present invention in detail below by the drawings and specific embodiments, but do not limit the scope of the invention.
Description of drawings
Figure is a kind of simple flow chart of technology of the present invention.
Reference numeral is shown in the figure:
The 1-sump pump, the 2-sewage-interchanger of purifying waste water, 3-stripping tower, 4-water cooler, 5-return tank, 6-reflux pump, 7-reboiler.
Embodiment
As shown in the figure, contain the sewage of methyl alcohol and dme,, after the heat exchange of purifying waste water at the bottom of the tower of sewage-purify waste water interchanger 2 and stripping tower 3, enter stripping tower 3, heat strippings with steam by reboiler 7 at the bottom of the tower of stripping tower 3 by sump pump 1 pressurization.The gas mixtures such as methyl alcohol that stripping tower 3 cats head produce enter return tank 5 after water cooler 4 coolings, boost through reflux pump 6, a part is returned stripping tower 3 cats head as backflow, the raw material that another part can be used as preparing low carbon olefinic hydrocarbon with methanol returns MTO device reaction part, but also carrying device is made other purposes outward.What come out at the bottom of stripping tower 3 towers is that methyl alcohol and two kinds of material gross weights of dme content are not more than purifying waste water of 100ppm, and delivers to outside the device after the sewage heat exchange that contains methyl alcohol and dme.Wherein stripping tower 3 cat head working pressures are 0.05～1.2MPa, are preferably 0.1～0.6MPa.Stripping tower 3 column bottom temperatures are 90 ℃～190 ℃, are preferably 110～165 ℃; The return tank service temperature is 20～100 ℃, is preferably 35～60 ℃; Reflux ratio is 1～50; Heat stripping with 0.2～2.0MPa steam by reboiler at the bottom of stripping tower 3 towers.
Stripping tower shown in the figure 3 is divided into two sections, cat head is a rectifying section to feed entrance, and feed entrance is a stripping section at the bottom of tower, and stripping tower 3 has 40～70 theoretical stages, its opening for feed is opened from the 10-35 piece theoretical stage of cat head to the tower truth of a matter, is preferably in 13-20 piece theoretical stage place.
The flow process shown in the figure according to the present invention, in processing condition be: the return tank temperature is 40 ℃, the stripping tower tower top temperature is 111.2 ℃, the stripping tower tower top pressure is 0.50MPa, the stripping tower column bottom temperature is under 156.3 ℃ the situation, handle 75 tons/hour in the raw material sewage that methyl alcohol and dme content are respectively 7290mg/L and 283mg/L, then stripping tower cat head methanol gas mixture is 573.87 kilograms/hour, go out purify waste water 74426.13 kilograms/hour of device, methanol content was that 73.50mg/L, dme content are 0mg/L during product was purified waste water; Methanol content is that 95.26 weight %, dme content are 3.70 weight % in the cat head methanol gas mixture, and handling raw material sewage consumption 1.0MPa steam per ton is 237.7 kilograms.Hence one can see that, uses art breading of the present invention to contain the sewage of methyl alcohol and dme, and methyl alcohol and two kinds of material gross weights of dme content were not more than 100ppm during product was purified waste water, and can satisfy sewage-farm feedwater quality requirement, and plant energy consumption were lower.
Claims (5)
1. sewage treatment process that contains methyl alcohol and dme, it is characterized in that comprising the steps: to contain the sewage of methyl alcohol and dme, the pressurization back and the heat exchange of purifying waste water at the bottom of the stripping Tata, enter stripping tower then, the gaseous mixture such as methyl alcohol that the stripping tower cat head produces enter return tank after heat exchange, a part is returned the stripping tower cat head as backflow, and it is outer or as the raw material of MTO device that another part is delivered to device; Go out to purify waste water at the bottom of the stripping Tata, with deliver to outside the device after the sewage heat exchange that contains methyl alcohol and dme, wherein stripping tower cat head working pressure is 0.05～1.2MPa, the stripping tower column bottom temperature is 90 ℃～190 ℃, the return tank service temperature is 20～100 ℃, and reflux ratio is 1～50.
2. technology according to claim 1 is characterized in that: stripping tower cat head working pressure is 0.1～0.6Mpa; The stripping tower column bottom temperature is 110～165 ℃; The return tank service temperature is 35～60 ℃.
3. technology according to claim 1 is characterized in that: heat stripping with 0.2～2.0MPa steam by reboiler at the bottom of the stripping Tata.
4. technology according to claim 1, it is characterized in that: described stripping tower is divided into two sections, and cat head is a rectifying section to feed entrance, and feed entrance is a stripping section at the bottom of tower, stripping tower has 40～70 theoretical stages, and its opening for feed is opened from the 10-35 piece theoretical stage of cat head to the tower truth of a matter.
5. technology according to claim 4 is characterized in that: the opening for feed of described stripping tower is opened from the 13-20 piece theoretical stage of cat head to the tower truth of a matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200710054988XA CN101139118B (en) | 2007-08-17 | 2007-08-17 | Technique for processing wastewater containing methanol and dimethyl ether |
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| CN200710054988XA CN101139118B (en) | 2007-08-17 | 2007-08-17 | Technique for processing wastewater containing methanol and dimethyl ether |
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| CN101139118A true CN101139118A (en) | 2008-03-12 |
| CN101139118B CN101139118B (en) | 2010-10-06 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060402B (en) * | 2009-11-17 | 2012-03-28 | 中国石油化工集团公司 | Sewage treatment method capable of recovering low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060347B (en) * | 2009-11-17 | 2012-03-28 | 中国石油化工集团公司 | Sewage treatment process for recycling low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060403B (en) * | 2009-11-17 | 2012-09-26 | 中国石油化工集团公司 | Sewage treatment process capable of recovering low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060404B (en) * | 2009-11-17 | 2012-11-21 | 中国石油化工集团公司 | Sewage treatment method for recycling low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102951983A (en) * | 2011-08-25 | 2013-03-06 | 中国石油化工股份有限公司 | Method for reducing energy consumption of device for preparing olefins from oxy-compound |
| CN103112984A (en) * | 2013-02-25 | 2013-05-22 | 中国石油天然气集团公司 | Method and device for comprehensive treatment of exhaust gas pollution of acidic water material tank |
| CN103253819A (en) * | 2013-04-22 | 2013-08-21 | 潍坊沃尔特化学有限公司 | Device and production technology for treating ternary-monomer wastewater and extracting sodium sulfate |
| CN103601617A (en) * | 2013-08-07 | 2014-02-26 | 中国石油集团东北炼化工程有限公司吉林设计院 | Technology for high efficiently recycling methanol from process water in device for preparing propylene from methanol |
| CN108373180A (en) * | 2018-04-19 | 2018-08-07 | 浙江兴兴新能源科技有限公司 | A kind of methanol-to-olefins sour water stripper and its sewage water treatment method |
| CN108557934A (en) * | 2018-04-28 | 2018-09-21 | 海南金海浆纸业有限公司 | A kind of reduction alkali collection condensed water COD methods |
| CN110203985A (en) * | 2018-05-24 | 2019-09-06 | 西安华江环保科技股份有限公司 | A kind of wastewater from chemical industry stripping processing unit and technique |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1124232A (en) * | 1994-12-06 | 1996-06-12 | 王师祥 | Non-pollution treating tech. process for waste water in gas production |
| US6334886B1 (en) * | 2000-05-12 | 2002-01-01 | Air Products And Chemicals, Inc. | Removal of corrosive contaminants from alkanolamine absorbent process |
| CN2621179Y (en) * | 2003-05-24 | 2004-06-23 | 乐清市金佩克新能源有限公司 | Device for treating factory waste water and producing fuel grade dimethyl ether by methanol liquid phase dehydration |
| CN100352775C (en) * | 2005-01-28 | 2007-12-05 | 南京大学 | Method for treating sewage generated by preparing methyl salicylate and resource recorery by composite technology |
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2007
- 2007-08-17 CN CN200710054988XA patent/CN101139118B/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060402B (en) * | 2009-11-17 | 2012-03-28 | 中国石油化工集团公司 | Sewage treatment method capable of recovering low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060347B (en) * | 2009-11-17 | 2012-03-28 | 中国石油化工集团公司 | Sewage treatment process for recycling low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060403B (en) * | 2009-11-17 | 2012-09-26 | 中国石油化工集团公司 | Sewage treatment process capable of recovering low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102060404B (en) * | 2009-11-17 | 2012-11-21 | 中国石油化工集团公司 | Sewage treatment method for recycling low-carbon hydrocarbons and low-carbon oxygen-containing organic matters |
| CN102951983A (en) * | 2011-08-25 | 2013-03-06 | 中国石油化工股份有限公司 | Method for reducing energy consumption of device for preparing olefins from oxy-compound |
| CN102951983B (en) * | 2011-08-25 | 2016-01-13 | 中国石油化工股份有限公司 | A kind of method reducing oxygenatedchemicals olefin hydrocarbon apparatus energy consumption |
| CN103112984B (en) * | 2013-02-25 | 2014-07-02 | 中国石油天然气集团公司 | Method and device for comprehensive treatment of exhaust gas pollution of acidic water material tank |
| CN103112984A (en) * | 2013-02-25 | 2013-05-22 | 中国石油天然气集团公司 | Method and device for comprehensive treatment of exhaust gas pollution of acidic water material tank |
| CN103253819B (en) * | 2013-04-22 | 2014-02-12 | 潍坊沃尔特化学有限公司 | Production technology for treating ternary-monomer wastewater and extracting sodium sulfate |
| CN103253819A (en) * | 2013-04-22 | 2013-08-21 | 潍坊沃尔特化学有限公司 | Device and production technology for treating ternary-monomer wastewater and extracting sodium sulfate |
| CN103601617A (en) * | 2013-08-07 | 2014-02-26 | 中国石油集团东北炼化工程有限公司吉林设计院 | Technology for high efficiently recycling methanol from process water in device for preparing propylene from methanol |
| CN108373180A (en) * | 2018-04-19 | 2018-08-07 | 浙江兴兴新能源科技有限公司 | A kind of methanol-to-olefins sour water stripper and its sewage water treatment method |
| CN108557934A (en) * | 2018-04-28 | 2018-09-21 | 海南金海浆纸业有限公司 | A kind of reduction alkali collection condensed water COD methods |
| CN110203985A (en) * | 2018-05-24 | 2019-09-06 | 西安华江环保科技股份有限公司 | A kind of wastewater from chemical industry stripping processing unit and technique |
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| CN101139118B (en) | 2010-10-06 |
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Address after: 100029 Beijing City, Chaoyang District Hui Street No. 6 Co-patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Patentee after: China Petrochemical Group Corp. Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Co-patentee before: Luoyang Petrochemical Engineering Co., China Petrochemical Group Patentee before: China Petrochemical Group Corp. |
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Owner name: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORAT Free format text: FORMER OWNER: SINOPEC GROUP Effective date: 20130326 Free format text: FORMER OWNER: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORATION Effective date: 20130326 |
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Effective date of registration: 20130326 Address after: 471003 Zhongzhou West Road, Henan, China, No. 27, No. Patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: China Petrochemical Group Corp. Patentee before: Luoyang Petrochemical Engineering Corporation /SINOPEC |