Method for rectifying ethanol by three-tower heat integration device

A process method, ethanol rectification technology, which is applied in the process field of ethanol rectification using a three-tower heat integration device, can solve problems such as difficult large-scale production of ethanol, achieve significant practicability and economic benefits, not easy to block, reduce The effect of operating energy consumption

Inactive Publication Date: 2007-12-12
蓝仁水 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly used to produce fermented alcohol raw materials, it is difficult to use for large-scale production of ethanol

Method used

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  • Method for rectifying ethanol by three-tower heat integration device
  • Method for rectifying ethanol by three-tower heat integration device
  • Method for rectifying ethanol by three-tower heat integration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Fig. 1 is a flow chart of the first three-tower heat-integrated azeotropic ethanol (or edible ethanol) energy-saving process.

[0049] The first tower is crude distillation tower T101, the second tower is low-pressure azeotropic distillation tower T102, and the third tower is high-pressure azeotropic distillation tower T103.

[0050] The fermented mash 1 exchanges heat with the top gas phase 14 of the low-pressure azeotropic distillation column T102 through E101, the preheated mash 2 exchanges heat with the wastewater 12 discharged from the crude distillation tower through E103, and the preheated mash 3 enters the crude distillation The upper part of tower T101.

[0051] There is a light component removal section at the top of the crude distillation tower, the gas phase 4 at the top of the crude distillation tower enters the partial condenser E104, E104 removes the non-condensable gas 6, and the condensate 5 flows back to the top of the crude distillation tower. The ga...

Embodiment 2

[0061] Fig. 2 is a second typical three-tower heat-integrated azeotropic ethanol (or edible ethanol) energy-saving process flow chart. It is based on the above example 1, directly transfers the energy of the gas phase 22 at the top of the high-pressure azeotropic rectification column to the bottom of the crude distillation column through E105, and saves a gas-liquid separation tank V102.

Embodiment 3

[0063] Fig. 3 is a third typical three-tower heat-integrated anhydrous ethanol (or fuel ethanol) energy-saving process flow chart.

[0064] The first tower is crude distillation tower T101, the second tower is low-pressure azeotropic distillation tower T102, and the third tower is high-pressure azeotropic distillation tower T103.

[0065] The fermented mash 1 exchanges heat with the top gas phase 14 of the low-pressure azeotropic distillation column T102 through E101, the preheated mash 2 exchanges heat with the wastewater 12 discharged from the crude distillation tower through E103, and the preheated mash 3 enters the crude distillation The upper part of tower T101.

[0066] There is a light component removal section at the top of the crude distillation tower, the gas phase 4 at the top of the crude distillation tower enters the partial condenser E104, E104 removes the non-condensable gas 6, and the condensate 5 flows back to the top of the crude distillation tower. The gas ...

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Abstract

The invention relates to a process of preparing ethanol through distillation from fermentation liquor by using three- tower heat integrated device. The whole ethaol distillation system at least comprises crude distillation column, low- pressure azeotropic rectifying tower, high- pressure azeotropic rectifying tower and other corollary equipment. The heat integration in said three towers and the application of heat exchange, energy saving technology and steam injector greatly reduce operational energy consumption. The optimized heat exchange system combines the molecular screen and rectifying system organically, which improves the stability and flexibility for the whole rectifying system. The invention can reduce operational energy consumption by more than 30%, and the practicity and economical benefit are high.

Description

technical field [0001] The invention relates to a process method for ethanol rectification using a three-tower heat integration device, which is an energy-saving process method for producing ethanol from fermented mash through a rectification process. Background technique [0002] With the shortage of energy resources such as oil and coal, environmental pollution, and greenhouse effect becoming more and more serious, energy saving and consumption reduction in ethanol and other industries have become the key to the survival and competitiveness of enterprises, and have received more and more attention from all sides. . [0003] At present, the process of producing ethanol (fuel ethanol, edible ethanol) from fermented mash mostly adopts double-tower distillation method. This method has the disadvantage of high production energy consumption, which restricts the economical production of ethanol industry. [0004] Chinese patent CN 200410094085.0 provides a production method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C29/80
Inventor 蓝仁水黄贵明
Owner 蓝仁水
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