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Ethanol distillation dehydration energy saving technique and device

A technology of ethanol distillation and ethanol tower, which is applied in the chemical industry, petroleum industry, preparation of hydroxyl compounds, etc., can solve problems such as waste of heat energy, and achieve the effects of reducing production costs, saving production costs, and huge economic and social benefits

Active Publication Date: 2012-05-30
TIANJIN UNIV
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Problems solved by technology

After rectification in this process, condensate to obtain liquid hydrous ethanol with a volume ratio close to the composition of ethanol-water azeotrope (ethanol volume ratio is 97.6%). Before entering the adsorption unit, this liquid hydrous ethanol needs to be evaporated into a gaseous state again and Pressurized feeding, which will undoubtedly cause a lot of waste of heat energy

Method used

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  • Ethanol distillation dehydration energy saving technique and device
  • Ethanol distillation dehydration energy saving technique and device
  • Ethanol distillation dehydration energy saving technique and device

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Embodiment Construction

[0021] The technology and equipment provided by the present invention will be further described below in conjunction with the accompanying drawings.

[0022] The present invention is achieved through the following technical solutions:

[0023] Such as figure 2 As shown, the overhead gas phase 5 obtained after the ethanol raw material 1 passes through the ethanol rectification tower 2 enters the partial condenser 6, and the obtained mixed material enters the reflux storage tank 7, and the liquid phase material therein returns to the ethanol rectification tower 2 as reflux liquid 8 , the gas phase material 9 enters the compressor 10, enters the adsorption unit 11 after being pressurized, and obtains the required high-concentration ethanol product 12 after adsorption.

[0024] The technology and equipment of the present invention can be applied to the production process of high-concentration ethanol. In order to better illustrate the advantages of the present invention in terms...

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Abstract

The invention relates to an ethanol distillation dehydration energy saving technique and a device thereof, the technical proposal of which is that (a) part of gas phase at the tower top of an ethanol rectifying tower is condensed; (b) part of condensed gas phase enters into a compressor to be pressured; (c) the compressed gas phase directly enters into an adsorption unit. Overhead gas phase obtained after ethanol raw material passes through the ethanol rectifying tower enters into a partial condenser, the obtained mixing material enters into a reflux storage tank; wherein, liquid phase material as circulating liquor returns to the ethanol rectifying tower, the gas phase material enters into the compressor, and then enters into the adsorption unit after being pressured, after absorption, the needed high concentration ethanoal product is obtained. The invention can effectively reduce heat exhaustion in the production course of high concentration ethanol and the condensation loading of the tower top of the rectifying tower, reduces the manufacturing cost of the ethanol and has good application prospect.

Description

technical field [0001] The invention relates to an energy-saving process and equipment for ethanol distillation and dehydration. The produced high-concentration ethanol can be used as chemical raw material, anhydrous solvent or used to produce fuel ethanol and the like. Background technique [0002] Ethanol can be divided into fermented ethanol and synthetic ethanol according to the production method. 93% of the world's ethanol production is produced by fermentation. Its raw material sources are very extensive, mainly including grain raw materials (corn, wheat, sorghum, rice), potato raw materials (sweet potato, cassava, potato), sugary raw materials (sugar cane, sugar beet, molasses) and cellulose raw materials. After the biomass is fermented, a fermentation mash with an ethanol volume fraction of 5% to 30% is obtained, and an anhydrous ethanol product can be obtained after the fermentation mash is rectified and dehydrated. [0003] Anhydrous ethanol is widely used in chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C29/80C10L1/02
CPCY02P20/10
Inventor 李洪李鑫钢李学刚姜斌隋红
Owner TIANJIN UNIV
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