CN102516031B - Method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production - Google Patents
Method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production Download PDFInfo
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- CN102516031B CN102516031B CN201110374008.0A CN201110374008A CN102516031B CN 102516031 B CN102516031 B CN 102516031B CN 201110374008 A CN201110374008 A CN 201110374008A CN 102516031 B CN102516031 B CN 102516031B
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Abstract
The invention discloses a method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production. Heat generated from a DMO synthetic reaction is collected by circulating water; high-temperature steam formed by the circulating water is used for heating a hot water tank; and the water in the hot water tank is utilized to circularly heat a conveying pipeline of DMO and keep the conveying pipeline warm. The byproduct steam of the reaction is utilized according to the method, so that the energy consumption is small, the cost of ethylene glycol is reduced, the easily curing phenomenon of DMO in the pipeline is thoroughly eliminated, the long-term stable running of production is ensured, the water temperature of a jacket is precisely controlled and the stable long-term production of an industrial production device is boosted.
Description
Technical field
The present invention relates to industrialization synthetic gas preparing ethylene glycol project, be specifically related to the anti-apparatus system of carrying charging process and the method to adopt that solidifies of dimethyl oxalate in industrial production of glycol.
Background technology
In ethylene glycol industrial installation, because ethylene glycol is that intermediate product dimethyl oxalate (DMO) hydrogenation reaction generates.Dimethyl oxalate is colourless monoclinic crystal, and 57 ℃ of fusing points are solid at normal temperatures.In suitability for industrialized production, it is liquid mobile in pipeline requiring DMO.And existing most of synthetic gas preparing ethylene glycol device adopts, be that the low-pressure steam of 0.3MPa is done adjoining pipe steam and prevented that DMO from solidifying in pipeline.One of shortcoming is in the fabrication and installation process of steam adjoining pipe, there will be blind spot, does not in use have the DMO in the process pipeline of adjoining pipe to solidify and to spread rapidly.Two of shortcoming is that the controllability of vapor temperature is poor, is subject to external influence factor more.Three of shortcoming is that energy consumption is large.
Summary of the invention
The object of the present invention is to provide the anti-apparatus system of carrying charging process and the method to adopt that solidifies of low, the anti-DMO solidification effect of a kind of energy consumption dimethyl oxalate in industrial production of glycol good and stable easily adjusting.
The anti-curing of dimethyl oxalate in industrial production of glycol of the present invention, to collect with recirculated water the heat that dimethyl oxalate building-up reactions is produced, use the formed high-temperature steam of this recirculated water to heat hot water storage tank simultaneously, use the water in hot water storage tank to carry out circulating-heating insulation to the transport pipe of dimethyl oxalate.
The apparatus system that the anti-curing of dimethyl oxalate provided by the invention adopts, comprise dimethyl oxalate synthesis reactor and for collecting the circulating water system of reaction heat, described circulating water system comprises high temperature steam pipeline, hot water circulating pump and low-pressure steam flash drum, described high temperature steam pipeline is connected to hot water storage tank by temperature-control adjustment device, and described temperature-control adjustment device comprises temperature control valve (TCV) and temperature control instrument; Described hot water storage tank is connected the peripheral hardware chuck of dimethyl oxalate transport pipe with hot water line by recycle pump.
The apparatus system that the anti-curing of dimethyl oxalate of the present invention adopts, wherein, described hot water storage tank is connected with the standby steam of low pressure, prepares against when reactive system is without byproduct steam in driving initial stage or the situation of stopping in emergency and uses.
The present invention utilizes the attached producing steam of synthetic DMO reaction liberated heat to set up a hot water station, for the jacket water (J.W.) insulation of DMO process pipeline.Due to CO linked reaction, preparing DMO is an irreversible strong exothermal reaction, and reaction heat has reached 159kJ/mol, produce l ram the loose soil with a stone-roller after sowing DMO can attached producing steam ton O.7.And adopt anti-the solidifying of dimethyl oxalate in industrial production of glycol of the present invention to carry the beneficial effect of charging process and apparatus system to be: (1) utilizes the attached producing steam of reaction, and energy consumption is little, has reduced the cost of ethylene glycol.(2) thoroughly solve DMO easy curing phenomenon in pipeline, guaranteed the long-period stable operation of producing.(3) chuck water temperature can accurately be controlled, and the stable long period that is conducive to industrial production device is produced.
Accompanying drawing explanation
Accompanying drawing is anti-curing device system for dimethyl oxalate in industrial production of glycol schematic diagram of the present invention.
In figure: 1, DMO synthesis reactor; 2, high temperature steam pipeline; 3, technique soft water; 4,1.0MPa steam; 5, low-pressure steam flash drum; 6, temperature control valve (TCV); 7, temperature control instrument; 8, hot water storage tank; 9, the standby steam of low pressure; 10, DMO peripheral hardware chuck return water pipe; 11, DMO pipeline peripheral hardware chuck; 12, DMO peripheral hardware chuck water inlet pipe; 13, recycle pump; 14, hot water circulating pump.
Embodiment
The anti-curing of dimethyl oxalate in industrial production of glycol of the present invention, to collect with recirculated water the heat that dimethyl oxalate building-up reactions is produced, use the formed high-temperature steam of this recirculated water to heat hot water storage tank simultaneously, use the water in hot water storage tank to carry out circulating-heating insulation to the transport pipe of dimethyl oxalate.
The apparatus system that the anti-curing of dimethyl oxalate provided by the invention adopts, comprise dimethyl oxalate synthesis reactor 1 and for collecting the circulating water system of reaction heat, wherein, circulating water system comprises high temperature steam pipeline 2, hot water circulating pump 14 and low-pressure steam flash drum 5, wherein high temperature steam pipeline 2 is connected to hot water storage tank 8 by temperature control valve (TCV) 6 and temperature control instrument (Tl) 7, hot water storage tank 8 is connected the peripheral hardware chuck 11 of dimethyl oxalate transport pipe with hot water line by recycle pump 13, simultaneously, hot water storage tank 8 is also connected with the standby steam of low pressure (0.3MPa) 9, prepare against when reactive system is without byproduct steam in driving initial stage or the situation of stopping in emergency and use.
The present invention utilizes oxonation byproduct steam to add thermochemical processes soft water 3 as thermal source, with temperature control valve (TCV) and temperature control instrument, by control vapor flow rate, controlling hot water storage tank temperature is 80 ℃, to meet the temperature requirement of DMO materail tube line jacket water (J.W.), thoroughly solve an easily curing industrialization difficult problem of DMO.In driving initial stage or the situation of stopping in emergency, reactive system is without byproduct steam, so it is standby to join a low-pressure steam pipe.All jacket water (J.W.) backwater return hot water storage tank, form closed cycle, then with recycle pump delivering hot water to each place that needs insulation, thereby thoroughly solved DMO easy curing phenomenon in pipeline, be conducive to the stable long period production of industrial production device.
Claims (2)
1. anti-curing device system for dimethyl oxalate in industrial production of glycol, comprise dimethyl oxalate synthesis reactor and for collecting the circulating water system of reaction heat, described circulating water system comprises high temperature steam pipeline, hot water circulating pump and low-pressure steam flash drum, it is characterized in that: described high temperature steam pipeline is connected to hot water storage tank by temperature-control adjustment device, described temperature-control adjustment device comprises temperature control valve (TCV) and temperature control instrument; Described hot water storage tank is connected the peripheral hardware chuck of dimethyl oxalate transport pipe with hot water line by recycle pump.
2. apparatus system as claimed in claim 1, is characterized in that: described hot water storage tank is connected with the standby steam of low pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110374008.0A CN102516031B (en) | 2011-11-23 | 2011-11-23 | Method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110374008.0A CN102516031B (en) | 2011-11-23 | 2011-11-23 | Method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production |
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| CN102516031A CN102516031A (en) | 2012-06-27 |
| CN102516031B true CN102516031B (en) | 2014-03-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898304B (en) * | 2012-10-30 | 2014-09-10 | 安徽淮化股份有限公司 | Method for recovering dimethyl oxalate in preparation process of ethylene glycol from synthetic gas |
| CN104610058B (en) * | 2015-01-14 | 2016-08-24 | 东华工程科技股份有限公司 | A kind of recycling technique of dimethyl oxalate. synthesis technique byproduct steam |
| CN110156600A (en) * | 2019-04-24 | 2019-08-23 | 亿利资源集团有限公司 | A kind of preparation system and preparation method of dimethyl oxalate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462961A (en) * | 2008-01-28 | 2009-06-24 | 上海戊正工程技术有限公司 | Process flow for producing ethylene glycol with coproduction product dimethyl carbonate |
| CN101934210A (en) * | 2010-09-13 | 2011-01-05 | 安徽淮化股份有限公司 | Carbonylation reactor suitable for industrial production of ethylene glycol |
| CN202322670U (en) * | 2011-11-23 | 2012-07-11 | 安徽淮化股份有限公司 | Anti-curing device system for dimethyl oxalate in industrial production of glycol |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462961A (en) * | 2008-01-28 | 2009-06-24 | 上海戊正工程技术有限公司 | Process flow for producing ethylene glycol with coproduction product dimethyl carbonate |
| CN101934210A (en) * | 2010-09-13 | 2011-01-05 | 安徽淮化股份有限公司 | Carbonylation reactor suitable for industrial production of ethylene glycol |
| CN202322670U (en) * | 2011-11-23 | 2012-07-11 | 安徽淮化股份有限公司 | Anti-curing device system for dimethyl oxalate in industrial production of glycol |
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Effective date of registration: 20210315 Address after: 201102 rooms 615-618, 6th floor, T1 / F, chengkai center, Lane 166, Minhong Road, Minhang District, Shanghai Patentee after: PUJING CHEMICAL INDUSTRY (SHA)LIMITED Address before: 232038 Anhui Province, Huainan city tianjia'an District Quanshan Patentee before: ANHUI HUAIHUA CHEMICAL GROUP Co.,Ltd. |
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