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Energy-saving distillation system for preparing ethanol from carbon monoxide and distillation method thereof

A carbon monoxide and energy-saving system technology, applied in chemical instruments and methods, distillation separation, separation methods, etc., can solve problems such as high energy consumption, failure to meet energy conservation and emission reduction guidelines, and high production costs

Pending Publication Date: 2019-06-21
CHINA LIGHT IND XIAN DESIGN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing carbon monoxide-to-ethanol distillation process consumes a lot of energy, which leads to high production costs and does not conform to the national energy-saving and emission-reduction guidelines and policies

Method used

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  • Energy-saving distillation system for preparing ethanol from carbon monoxide and distillation method thereof
  • Energy-saving distillation system for preparing ethanol from carbon monoxide and distillation method thereof

Examples

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Embodiment 1

[0050] (1) The distillation energy-saving system for producing ethanol from carbon monoxide, including: a first-stage preheater 1 for clear mash, a second-stage preheater 2 for clear mash, a third-stage preheater 3 for clear mash and a first-stage preheater for clear mash connected in series through tubes a CO 2 Separator 6; wherein, the tube-side inlet of the primary preheater 1 communicates with the raw material inlet of the fermented clear mash; the first CO 2 The bottom mash outlet of the separator 6 is communicated with the feed port of the composite tower 13, and the composite tower 13 is made up of the crude distillation tower II and the rectification tower II; the first CO 2 The top gas outlet of the separator 6 communicates with the air inlet at the bottom of the scrubber 9 side walls;

[0051] The shell side inlet of the first stage preheater 1 of the clear mash is connected to the dehydration section, the shell side outlet of the first stage preheater 1 of the clea...

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Abstract

The invention discloses an energy-saving distillation system for preparing ethanol from carbon monoxide and a distillation method thereof. The energy-saving distillation system comprises a crude distillation tower I, a composite tower comprising a crude distillation tower II / a rectification tower II, a rectification tower I, as well as a reboiler, a condenser, a heat exchanger, a storage tank, a vacuum pump, a transfer pump and the like which are matched with the rectification tower I, wherein a boiler is used to steam, and the rectification tower I is heated by the reboiler; alcohol vapor atthe tower top of the rectification tower I is supplied to the composite tower for heating; alcohol vapor at the tower top of the composite tower is supplied to the crude distillation tower I for heating; alcohol vapor at the tower top of the crude distillation tower I serves as fermentation thick mash for first-stage preheating; vinasse at the bottom of the crude distillation tower I serves as thick mash for second-stage preheating. By the adoption of a reasonable distillation thermal coupling technology and a three-stage differential pressure distillation technology, the energy-saving distillation system can fully couple usable energy in alcohol production, so that the distillation energy consumption is reduced by about 20% when being compared with that of conventional distillation; the distillation method is simple; energy between the towers is ensured to be fully and effectively used; the energy consumption is low; the production cost is significantly reduced.

Description

technical field [0001] The invention relates to the field of fuel ethanol preparation, in particular to an energy-saving distillation system for ethanol production from carbon monoxide and a distillation method thereof. Background technique [0002] Ethanol production from carbon monoxide is a new technology researched and invented in recent years. At present, steel plant converter gas (main component CO) is used as raw material, and CO in the gas is converted into clean energy fuel ethanol through microbial fermentation. The existing carbon monoxide-to-ethanol distillation process consumes a lot of energy, which leads to high production costs and does not conform to the energy-saving and emission-reduction guidelines and policies advocated by the state. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide an energy-saving distillation system and distillation method for producing ethanol from...

Claims

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Application Information

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IPC IPC(8): B01D3/00B01D3/14C07C29/152C07C29/80C07C31/08
CPCY02P20/10Y02P20/50
Inventor 刘建文褚易興李晓王新刚
Owner CHINA LIGHT IND XIAN DESIGN ENG
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