CN104415567A - Novel double-effect rectifying process - Google Patents
Novel double-effect rectifying process Download PDFInfo
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- CN104415567A CN104415567A CN201310400260.3A CN201310400260A CN104415567A CN 104415567 A CN104415567 A CN 104415567A CN 201310400260 A CN201310400260 A CN 201310400260A CN 104415567 A CN104415567 A CN 104415567A
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Abstract
The invention relates to a novel double-effect rectifying process. For an ethanol-water system, the energy saving rate can be up to 54% and is more than 15% at the minimum, which meets the requirement of industrial energy saving. The energy-saving rectifying process has important significance in reducing energy consumption in the petroleum chemical process, and thus build-up of a variety of energy-saving rectifying processes and an optimized simulating and analyzing system thereof is necessary for the national situations of China and is an effective means for eliminating or alleviating international energy shortage.
Description
Technical field
The present invention relates to a kind of Novel double-effect rectification process, the invention belongs to industrial chemical field.
Background technology
Petrochemical plant has two basic main process: one is course of reaction; Two is separation processes, and the energy consumption of usual separation process will account for about 80% of device total energy consumption.The most frequently used and effective method is rectifying in separation process, distillation process is the separating-purifying exchanging petrochemicals with the consumption of heat energy for, and because the irreversibility of process is very large, but thermodynamic efficiency is very low, and therefore energy consumption is very high.The energy consumption of distillation process will account for about 60% of whole petrochemical plant total energy consumption, therefore will reduce the energy consumption of petrochemical plant, and key is will carry out distillation process energy-conservation.
Technological process and the method for the Finestill energy-saving study at present, developed mainly contain: operation conditions optimization, change tower internals, change high efficiency packing, and it is integrated to set up middle heating, condensing unit and heat.Wherein, theoretical research is more, and the relatively ripe energy-saving rectifying flow process of technique mainly contains: heat pump distillation, hot torsion tests, double-effect rectification.And in double-effect rectification technique more ripe be advection, adverse current, following current double-effect rectification, these three kinds of flow processs are when feeding temperature is less than bubble point temperature, and energy-saving effect is remarkable, but when feeding temperature is higher than bubble point temperature, energy-saving effect is not very desirable.Therefore, for bubble point above temperature charging situation, we have developed novel energy-conserving technique---and gas feed makes reboiler thermal source double-effect rectification technique.
A kind of Novel double-effect rectification process, for ethanol-water system, its fractional energy savings is up to 54%, and minimum also more than 15%, this has met the needs of industrial energy saving.Energy-saving distillation process is extremely important to the energy consumption effect reducing petrochemical process, therefore multiple energy-saving distillation process is set up, and set up the needs that its Optimized Simulated and analytical system are China's national situations, be solve or alleviate international energy effective means in short supply.
Summary of the invention
It is a kind of novel and Finestill energy-saving technology efficiently that the gas phase that the present invention relates to enters concentration tower double-effect rectification, using gas phase to enter concentration tower double-effect rectification is from high-pressure tower charging, unlike this flow process from the charging of high-pressure tower tower reactor, owing to being gas-phase feed, the heat of feed stream just in time can replace this thermal source of reboiler to provide the heat required for distillation process for tower reactor.The tower top of lower pressure column and high-pressure tower all has light component extraction, and heavy constituent is only in the extraction of lower pressure column tower reactor.
Raw material enters at the bottom of high-pressure tower tower, and at the bottom of its tower, extraction enters lower pressure column as raw material, carries out heat exchange, reach the object of heat integration by the integrated high pressure overhead vapours that makes of heat as thermal source and lower pressure column tower reactor.Two column overhead all have extraction, and only have high-pressure tower to have product extraction at the bottom of tower.
Accompanying drawing explanation
Fig. 1 is that gas phase enters the technological process of concentration tower double-effect rectification.
Detailed description of the invention
The present invention relates to a kind of Novel double-effect rectification process, detailed description of the invention is: raw material enters at the bottom of high-pressure tower tower, at the bottom of its tower, extraction enters lower pressure column as raw material, carries out heat exchange, reach the object of heat integration by the integrated high pressure overhead vapours that makes of heat as thermal source and lower pressure column tower reactor.Two column overhead all have extraction, and only have high-pressure tower to have product extraction at the bottom of tower.Under feeding temperature is 135 DEG C of conditions, in charging, mole rate of ethanol is 0.4, and fractional energy savings reaches 54.05%.
Claims (4)
1. the present invention relates to a kind of Novel double-effect rectification process, it is characterized in that: in preparation process, use quaternary ammonium salt and organo-metallic compound to arrange in pairs or groups as catalyst, not only shorten the reaction time, improve the many-sided performance of paint film simultaneously.
2. a kind of Novel double-effect rectification process according to claim 1, it is characterized in that: raw material enters at the bottom of high-pressure tower tower, at the bottom of its tower, extraction enters lower pressure column as raw material, carry out heat exchange by the integrated high pressure overhead vapours that makes of heat as thermal source and lower pressure column tower reactor, reach the object of heat integration.
3. a kind of Novel double-effect rectification process according to claim 1, is characterized in that: two column overhead all have extraction, and only have high-pressure tower to have product extraction at the bottom of tower.
4. a kind of Novel double-effect rectification process according to claim 1, it is characterized in that: under feeding temperature is 135 DEG C of conditions, in charging, mole rate of ethanol is 0.4, and fractional energy savings reaches 54.05%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310400260.3A CN104415567A (en) | 2013-09-06 | 2013-09-06 | Novel double-effect rectifying process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310400260.3A CN104415567A (en) | 2013-09-06 | 2013-09-06 | Novel double-effect rectifying process |
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| Publication Number | Publication Date |
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| CN104415567A true CN104415567A (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310400260.3A Pending CN104415567A (en) | 2013-09-06 | 2013-09-06 | Novel double-effect rectifying process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108276249A (en) * | 2018-04-04 | 2018-07-13 | 烟台国邦化工机械科技有限公司 | A kind of high concentration ethanol double-effect rectification process and system |
| CN108704330A (en) * | 2018-06-15 | 2018-10-26 | 武汉理工大学 | A kind of low energy consumption variable-pressure rectification system |
| CN110280037A (en) * | 2019-08-08 | 2019-09-27 | 中国恩菲工程技术有限公司 | Titanium tetrachloride rectifier unit |
-
2013
- 2013-09-06 CN CN201310400260.3A patent/CN104415567A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108276249A (en) * | 2018-04-04 | 2018-07-13 | 烟台国邦化工机械科技有限公司 | A kind of high concentration ethanol double-effect rectification process and system |
| CN108704330A (en) * | 2018-06-15 | 2018-10-26 | 武汉理工大学 | A kind of low energy consumption variable-pressure rectification system |
| CN108704330B (en) * | 2018-06-15 | 2019-11-26 | 武汉理工大学 | A kind of low energy consumption variable-pressure rectification system |
| CN110280037A (en) * | 2019-08-08 | 2019-09-27 | 中国恩菲工程技术有限公司 | Titanium tetrachloride rectifier unit |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |