CN102516031A - 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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- CN102516031A CN102516031A CN2011103740080A CN201110374008A CN102516031A CN 102516031 A CN102516031 A CN 102516031A CN 2011103740080 A CN2011103740080 A CN 2011103740080A CN 201110374008 A CN201110374008 A CN 201110374008A CN 102516031 A CN102516031 A CN 102516031A
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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
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Technical field
The present invention relates to industriallization synthetic gas preparing ethylene glycol project, be specifically related to terepthaloyl moietie industrial production mesoxalic acid dimethyl ester and prevent curing conveying charging process and the apparatus system that this method adopted.
Background technology
In the terepthaloyl moietie industrial installation,, terepthaloyl moietie generates because being intermediate product dimethyl oxalate (DMO) hydrogenation reaction.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 most existing synthetic gas preparing ethylene glycol device adopts is that the LP steam of the 0.3MPa pipe steam of keeping company prevents that DMO from solidifying in pipeline.One of shortcoming is in the fabrication and installation process that the steam companion manages, and blind spot can occur, in use accompanies the interior DMO of process pipeline of pipe rapid curing to spread.Two of shortcoming is that the controllability of vapor temperature is poor, receives external influence factor more.Three of shortcoming is that energy consumption is big.
Summary of the invention
The object of the present invention is to provide anti-conveying charging process and the apparatus system that this method adopted of solidifying of the good and stable terepthaloyl moietie industrial production mesoxalic acid dimethyl ester that is prone to regulate of low, the anti-DMO solidification effect of a kind of energy consumption.
Terepthaloyl moietie industrial production mesoxalic acid dimethyl ester of the present invention is prevented curing; Be to collect the heat that the dimethyl oxalate building-up reactions is produced with recirculated water; Use the formed high-temperature steam of this recirculated water that the hot water storage tank is heated simultaneously, use water in the hot water storage tank the transport pipe of the dimethyl oxalate heat tracing that circulates.
The apparatus system that the anti-curing of dimethyl oxalate provided by the invention is adopted; Comprise dimethyl oxalate synthesis reactor and the circulating water system that is used to collect reaction heat; Said circulating water system comprises high temperature steam pipeline, hot water circulting pump and LP steam flash drum; Said high temperature steam pipeline is connected to the hot water storage tank through temperature-control adjustment device, and said temperature-control adjustment device comprises temperature control valve (TCV) and temperature control instrument; Said hot water storage tank is connected the peripheral hardware chuck of dimethyl oxalate transport pipe with the hot water line through recycle pump.
The apparatus system that the anti-curing of dimethyl oxalate of the present invention is adopted, wherein, said hot water storage tank is connected with the subsequent use steam of low pressure, does not prepare against when reactive system has byproduct steam under the driving initial stage or the situation of stopping in emergency and uses.
The present invention utilizes synthetic DMO reaction liberated heat to attach producing steam and sets up a hot water station, is used for the jacket water (J.W.) insulation of DMO process pipeline.Because it is an irreversible strong exothermal reaction that the CO linked reaction prepares DMO, reaction heat has reached 159kJ/mol, and production l rams the loose soil with a stone-roller after sowing DMO can attach O.7 ton of producing steam.And adopt anti-curing of terepthaloyl moietie industrial production mesoxalic acid dimethyl ester of the present invention to carry the beneficial effect of charging process and apparatus system promptly to be: (1) utilizes reaction to attach producing steam, and energy consumption is little, has reduced the cost of terepthaloyl moietie.(2) thoroughly solve DMO and in pipeline, be prone to the solidified phenomenon, guaranteed the long-period stable operation of producing.(3) the chuck water temperature can accurately be controlled, and helps the stable LP production of industrial production device.
Description of drawings
Accompanying drawing is the anti-solidification equipment system schematic of terepthaloyl moietie industrial production mesoxalic acid dimethyl ester of the present invention.
Among the figure: 1, DMO synthesis reactor; 2, high temperature steam pipeline; 3, technology soft water; 4,1.0MPa steam; 5, LP steam flash drum; 6, temperature control valve (TCV); 7, temperature control instrument; 8, hot water storage tank; 9, the subsequent use 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 circulting pump.
Embodiment
Terepthaloyl moietie industrial production mesoxalic acid dimethyl ester of the present invention is prevented curing; Be to collect the heat that the dimethyl oxalate building-up reactions is produced with recirculated water; Use the formed high-temperature steam of this recirculated water that the hot water storage tank is heated simultaneously, use water in the hot water storage tank the transport pipe of the dimethyl oxalate heat tracing that circulates.
The apparatus system that the anti-curing of dimethyl oxalate provided by the invention is adopted; Comprise dimethyl oxalate synthesis reactor 1 and the circulating water system that is used to collect reaction heat; Wherein, Circulating water system comprises high temperature steam pipeline 2, hot water circulting pump 14 and LP steam flash drum 5; Wherein high temperature steam pipeline 2 is connected to hot water storage tank 8 through temperature control valve (TCV) 6 and temperature control instrument (Tl) 7, and hot water storage tank 8 is connected the peripheral hardware chuck 11 of dimethyl oxalate transport pipe through recycle pump 13 with the hot water line, simultaneously; Hot water storage tank 8 also is connected with the subsequent use steam of low pressure (0.3MPa) 9, does not prepare against when reactive system has byproduct steam under the driving initial stage or the situation of stopping in emergency and uses.
The present invention utilizes the oxonation byproduct steam to add thermochemical processes soft water 3 as thermal source; Using temperature control valve (TCV) and temperature control instrument to control hot water storage tank temperature through the control vapor flow rate is 80 ℃; To satisfy the temperature requirement of DMO materail tube line jacket water (J.W.), thoroughly solve DMO and be prone to a solidified industriallization difficult problem.Reactive system does not have byproduct steam under the driving initial stage or the situation of stopping in emergency, so it is subsequent use to join a short steam pipe.All jacket water (J.W.) backwater return the hot water storage tank, form closed cycle, arrive each place that needs insulation with the recycle pump delivering hot water then, in pipeline, are prone to the solidified phenomenon thereby thoroughly solved DMO, help the stable LP production of industrial production device.
Claims (3)
1. terepthaloyl moietie industrial production mesoxalic acid dimethyl ester is prevented curing; It is characterized in that: collect the heat that the dimethyl oxalate building-up reactions is produced with recirculated water; Use the formed high-temperature steam of this recirculated water that the hot water storage tank is heated simultaneously, use water in the hot water storage tank the transport pipe of the dimethyl oxalate heat tracing that circulates.
2. the described dimethyl oxalate of claim 1 is prevented the apparatus system that curing is adopted; Comprise dimethyl oxalate synthesis reactor and the circulating water system that is used to collect reaction heat; Said circulating water system comprises high temperature steam pipeline, hot water circulting pump and LP steam flash drum; It is characterized in that: said high temperature steam pipeline is connected to the hot water storage tank through temperature-control adjustment device, and said temperature-control adjustment device comprises temperature control valve (TCV) and temperature control instrument; Said hot water storage tank is connected the peripheral hardware chuck of dimethyl oxalate transport pipe with the hot water line through recycle pump.
3. apparatus system as claimed in claim 2 is characterized in that: said hot water storage tank is connected with the subsequent use steam of low pressure.
Priority Applications (1)
| 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 |
|---|---|---|---|
| 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 true CN102516031A (en) | 2012-06-27 |
| CN102516031B CN102516031B (en) | 2014-03-12 |
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| CN201110374008.0A Active 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898304A (en) * | 2012-10-30 | 2013-01-30 | 安徽淮化股份有限公司 | Method for recovering dimethyl oxalate in preparation process of ethylene glycol from synthetic gas |
| CN104610058A (en) * | 2015-01-14 | 2015-05-13 | 东华工程科技股份有限公司 | Recycling technology for byproduct steam of dimethyl oxalate synthetic process |
| 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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2011
- 2011-11-23 CN CN201110374008.0A patent/CN102516031B/en active Active
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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898304A (en) * | 2012-10-30 | 2013-01-30 | 安徽淮化股份有限公司 | Method for recovering dimethyl oxalate in preparation process of ethylene glycol from synthetic gas |
| CN104610058A (en) * | 2015-01-14 | 2015-05-13 | 东华工程科技股份有限公司 | Recycling technology for byproduct steam of dimethyl oxalate synthetic process |
| 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 |
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| CN102516031B (en) | 2014-03-12 |
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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. |