Process for extracting vegetable oil from distiller grains

Process for extracting vegetable oil from distiller grains

  • CN 104,593,140 A
  • Filed: 01/22/2015
  • Published: 05/06/2015
  • Est. Priority Date: 01/22/2015
  • Status: Active Application
First Claim
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1. one kind is extracted the technique of vegetables oil in vinasse, comprise, 1) method that is centrifugal or sheet frame extruding is used to carry out solid-liquid separation, obtain filter residue and filtrate, 2) filtrate is by pyrogenic distillation simmer down to vinasse underflow, 3) then vinasse underflow and filter residue again mix and carry out drying treatment, make moisture content lower than 10%, store as feed DDGS;

  • It is characterized in that;

    the vegetables oil separating technology system 1 after vinasse underflow of adding is to extract the vegetables oil in vinasse, be specially;

    vinasse underflow is sent to vegetables oil tripping device to be separated and obtains the vegetables oil of high added value, vinasse underflow after deoiling and filter residue again mix and carry out drying treatment, make moisture content lower than 10%, store as feed;

    To the pretreatment technology system 2 of vinasse underflow before being also included in vegetables oil separating step, improve the separation efficiency at vegetables oil, underflow pre-treatment comprises;

         1) heat to vinasse and destroy oil-water emulsion, make ensuing separating of oil more effective, the temperature of heating is between 60 to 100 degrees Celsius;

    The time of heating is between 5 minutes to 120 minutes;

         2) add chemical demulsifier to destroy oil-water emulsion, thus improve ensuing separating of oil step, described chemical demulsifier is sodium hydroxide or ethanol or glycerol, and the scope added is between 1% to 20% of vinasse underflow total amount;

         3) regulate the pH value of vinasse underflow to improve separating of oil efficiency, the pH value of underflow is between 2 to 9.

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