CN102153445A - Gaseous phase methanol recycling technology - Google Patents
Gaseous phase methanol recycling technology Download PDFInfo
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- CN102153445A CN102153445A CN2011100601601A CN201110060160A CN102153445A CN 102153445 A CN102153445 A CN 102153445A CN 2011100601601 A CN2011100601601 A CN 2011100601601A CN 201110060160 A CN201110060160 A CN 201110060160A CN 102153445 A CN102153445 A CN 102153445A
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- methanol
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- phase methanol
- recycling
- gaseous phase
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Abstract
The invention discloses a gaseous phase methanol recycling technology including the steps of directly sending excessive methanol vapor which does react fully and water vapor generated in reaction during the esterification process into a gaseous phase methanol recycling tower in the type of overheat vapor and by an exhaust pipe, heating the gaseous phase methanol recycling tower through a reboiler to provide heat, and recycling and storing the purified methanol which is reheated and gasified by the gaseous phase methanol recycling tower. The advantages are as follows: the water vapor generated in reaction together with the excessive methanol vapor which does not react fully during chemical industry production enters the gaseous phase methanol recycling tower in the type of overheat vapor, and the water vapor and the excessive methanol vapor are directly purified and recycled after reheated in the tower; and the recycling technology flow is shortened, the surplus equipment investment is reduced, the energy consumption is lowered, the recycling rate of methanol is high, and simultaneously the waste of methanol as well as the pollution of methanol to environment is reduced.
Description
Technical field
The gas phase that the present invention relates to a kind of recovery technology, particularly a kind of methyl alcohol of Chemical Manufacture reclaims technology.
Background technology
Make the field in biofuel, Methanol Recovery generally adopts traditional methanol rectification technology, be about to the intact methanol steam of the water vapor that produces in the esterification process and excessive unreacted together, become liquid phase through condenser condenses earlier, send into recovery tower by the methanol-water transferpump again, carry out atmospheric distillation then.This cover reclaims equipment such as requirements of process methanol-water condenser, methanol-water condensation withdrawing can, methanol-water transferpump, simultaneously because methyl alcohol is to enter recovery tower with liquid phase, the steam consumption of reboiler is bigger, and therefore there are shortcomings such as technical process is long, energy consumption is high, facility investment is many in existing liquid phase Methanol Recovery technology.
Summary of the invention
Goal of the invention: at the problems referred to above, the purpose of this invention is to provide a kind of Methanol Recovery technology of chemical production field, reduce technical process, reduce the pollution of the waste of methyl alcohol and methanol gas simultaneously to environment.
Technical scheme: a kind of gas-phase methanol reclaims technology, this technical process is as follows: the water vapor that methanol steam that unreacted excessive in the esterification process is intact and reaction produce is directly sent into the gas-phase methanol recovery tower with the form of superheated vapour by vapor pipe, the gas-phase methanol recovery tower provides heat by reboiler heating, will through the gas-phase methanol recovery tower again the purification Methanol Recovery after the hot gasization store and get final product.
Gas-phase methanol recovery tower cat head adopts internal reflux, improves the rate of recovery of methyl alcohol.
Beneficial effect: compared with prior art, to be the intact methanol steam of water vapor that reaction in the Chemical Manufacture is produced and excessive unreacted enter the gas-phase methanol recovery tower with the form of superheated vapour to advantage of the present invention together, directly purification recovery of heat back again in tower, shorten and reclaim technical process, reduce unnecessary facility investment, cut down the consumption of energy, Methanol Recovery rate height reduces the pollution to environment of the waste of methyl alcohol and methanol gas simultaneously.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used to the present invention is described and is not used in and limit the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
As shown in drawings, a kind of gas-phase methanol reclaims technology, this technical process is as follows: the water vapor that methanol steam that unreacted excessive in the esterification process is intact and reaction produce is directly sent into the gas-phase methanol recovery tower with the form of superheated vapour by vapor pipe, the gas-phase methanol recovery tower provides heat by reboiler heating, will through the gas-phase methanol recovery tower again the purification Methanol Recovery after the hot gasization store and get final product.
In the invention described above technical process, the purification methyl alcohol after the recovery is recycling, and gas-phase methanol recovery tower cat head adopts internal reflux, and Methanol Recovery in the recycle column has improved the rate of recovery of methyl alcohol; After handling again, also still can use in the sewage that recovery tower is discharged.
Be example with biofuel manufacturing field below, being embodied as of technical process of the present invention: after the esterification, to directly enter the gas-phase methanol recovery tower with the water vapor that reacts generation by vapor pipe from the intact methanol steam of the excessive unreacted that esterifying kettle comes out and carry out Methanol Recovery, feeding temperature is 95 ℃～110 ℃, reclaiming Tata still temperature is 95 ℃～110 ℃, tower top temperature is 60 ℃～70 ℃, and the recovery tower working pressure is a pressure-fired; The gas-phase methanol recovery tower adopts hot rainbow formula reboiler heating that heat is provided, reboiler steam is 0.5～0.65Mpa(absolute pressure), cat head adopts internal reflux, methyl alcohol weight percentage in the cat head exhaust is below 0.10%～0.50%, Methanol Recovery purity reaches more than 99%, and the purification methyl alcohol after the recovery turns back to the methyl alcohol storage tank and uses for esterification once more.
Claims (2)
1. a gas-phase methanol reclaims technology, it is characterized in that this technical process is as follows: the water vapor that methanol steam that unreacted excessive in the esterification process is intact and reaction produce is directly sent into the gas-phase methanol recovery tower with the form of superheated vapour by vapor pipe, the gas-phase methanol recovery tower provides heat by reboiler heating, will through the gas-phase methanol recovery tower again the purification Methanol Recovery after the hot gasization store and get final product.
2. gas-phase methanol according to claim 1 reclaims technology, it is characterized in that: gas-phase methanol recovery tower cat head adopts internal reflux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100601601A CN102153445A (en) | 2011-03-14 | 2011-03-14 | Gaseous phase methanol recycling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100601601A CN102153445A (en) | 2011-03-14 | 2011-03-14 | Gaseous phase methanol recycling technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102153445A true CN102153445A (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011100601601A Pending CN102153445A (en) | 2011-03-14 | 2011-03-14 | Gaseous phase methanol recycling technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708997A (en) * | 2013-12-18 | 2014-04-09 | 江苏江山制药有限公司 | Method for recovering methanol gas generated in Vc-Na methanol solution centrifuging process realized by using siphonic centrifuge |
| CN111359248A (en) * | 2020-03-31 | 2020-07-03 | 龙岩卓越新能源股份有限公司 | Production method of superheated methanol gas in biodiesel continuous production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037376A (en) * | 2007-04-19 | 2007-09-19 | 龙岩卓越新能源发展有限公司 | Methyl esterification in biologic diesel oil production and methanol continuously purification device |
| CN101195572A (en) * | 2006-12-08 | 2008-06-11 | 四川古杉油脂化学有限公司 | Method for synthesizing fatty acid methyl ester |
| CN101624534A (en) * | 2008-07-12 | 2010-01-13 | 程文波 | Methanol esterification method in production of biodiesel |
-
2011
- 2011-03-14 CN CN2011100601601A patent/CN102153445A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195572A (en) * | 2006-12-08 | 2008-06-11 | 四川古杉油脂化学有限公司 | Method for synthesizing fatty acid methyl ester |
| CN101037376A (en) * | 2007-04-19 | 2007-09-19 | 龙岩卓越新能源发展有限公司 | Methyl esterification in biologic diesel oil production and methanol continuously purification device |
| CN101624534A (en) * | 2008-07-12 | 2010-01-13 | 程文波 | Methanol esterification method in production of biodiesel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708997A (en) * | 2013-12-18 | 2014-04-09 | 江苏江山制药有限公司 | Method for recovering methanol gas generated in Vc-Na methanol solution centrifuging process realized by using siphonic centrifuge |
| CN111359248A (en) * | 2020-03-31 | 2020-07-03 | 龙岩卓越新能源股份有限公司 | Production method of superheated methanol gas in biodiesel continuous production |
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Application publication date: 20110817 |