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Production system and method of fuel ethanol

A technology of fuel ethanol and mixed materials, applied in biofuels, methods of supporting/immobilizing microorganisms, methods of sterilization, etc., can solve the problems of decreased pervaporation performance, unrecoverable carbon dioxide, and increased operating costs, etc., to achieve convenient operation, The effect of high added value of products and low investment in equipment

Active Publication Date: 2016-06-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pervaporation is widely used in ethanol fermentation. It has the advantages of high separation efficiency, simple process, and no toxicity to microorganisms. Although pervaporation can separate ethanol from fermentation broth in a timely and continuous manner, it also has its disadvantages: Aging of cells on the side is prone to occur, accumulation of inorganic salts and non-volatile products, resulting in membrane fouling, thereby reducing the pervaporation performance of the membrane, poor separation effect, short membrane service life, and increased operating costs to a certain extent
However, the method and equipment have disadvantages such as complex process, large investment in equipment, and inability to recover carbon dioxide.

Method used

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  • Production system and method of fuel ethanol
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Embodiment 1

[0074] The effective membrane area of ​​the membrane separation device is 4.0m 2 , add the prepared 200L fermentation liquid into the fermenter 1; start the sterilization process, the sterilization temperature is 120°C, and the sterilization time is 30min; After the temperature of the fermenter 1 is constant, weigh 800g Angel dry yeast, after rehydration and activation for 20min, put it into the fermenter 1 to start fermentation; ferment for 15h, set the pressure of the first pressure regulating valve 3 to 0.15MPa, and start the second A supercharger 5, when the bottom of the fermenter 1 has bubbles evenly blowing out, continue for 10 minutes; open the second supercharger 6, set the pressure of the second pressure regulating valve 7 to 0.4MPa, and the mixed material discharged by the vacuum ejector 8 Enter the gas-liquid separation tank 10 after passing through the first condenser 9; set the pressure of the third pressure regulating valve 13 to 0.2 MPa, start the third superch...

Embodiment 2

[0076] The effective membrane area of ​​the membrane separation device is 6.0m 2 , add the prepared 300L fermentation liquid into the fermenter 1; start the sterilization process, the sterilization temperature is 110°C, and the sterilization time is 45min; ; After the temperature of the fermenter 1 is constant, weigh 1.0kg of Angel yeast, after rehydration and activation for 30 minutes, put it into the fermenter 1 to start fermentation; after 15 hours of fermentation, start to add the feed solution with a glucose concentration of 800g / L, set the first The pressure of the pressure regulating valve 3 is 0.3MPa, and the first supercharger 5 is started. When there are bubbles evenly blowing out from the bottom of the fermenter 1, it lasts for 5 minutes; the second supercharger 6 is started, and the second pressure regulating valve 7 is set. The pressure is 0.5MPa, and the mixed material discharged from the vacuum ejector 8 enters the gas-liquid separation tank 10 after passing thr...

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Abstract

The invention provides a production system and method of fuel ethanol. The system comprises the following parts: a fermentation device; a membrane separation device, which comprises a membrane module connected with a fermentation device by a fermentation pipeline, wherein the fermentation pipeline is provided with a first supercharger and a first pressure regulating valve; a vacuum ejector, which is connected to the membrane module, and uses the carbon dioxide generated by the fermentation device as a cycle carrier gas to maintain negative pressure on the permeate side of the membrane module; and a gas-liquid separation device, which comprises a gas-liquid tank connected to the vacuum injector respectively by a separation line and a first gas pipeline, connected to a gas collector through a second gas pipeline, and connected to a rectification device through a liquid pipeline. The invention also discloses a fuel ethanol production method using the above system.

Description

technical field [0001] The invention relates to a fuel ethanol production device and method, in particular to a fuel ethanol production system and method coupled with fermentation and steam permeation. Background technique [0002] In recent years, the world is facing a serious energy crisis, and finding new alternative energy sources has become the key to the future energy strategies of countries around the world. As the world's oil reserves are decreasing day by day, the energy crisis is becoming more and more prominent. Fuel ethanol is favored by people because of its advantages of cleanness, environmental protection and renewable. Most fuel ethanol production processes use biological fermentation, but in traditional fermentation processes, with the continuous accumulation of ethanol and the continuous increase of ethanol concentration, the inhibitory effect of ethanol on yeast cells continues to increase, which seriously restricts the improvement of fuel ethanol producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/12C12M1/04C12M1/00C12P7/06C07C29/76C07C31/08
CPCY02E50/10
Inventor 惠继星马中义刘海军朱庆伟张卫东徐友海胡世洋岳军
Owner PETROCHINA CO LTD
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