| 摘要 |
<p>A process for cooking starchy material which comprises mixing the starchy material with water, pumping the mixture through one or more preheating units (14) heated by direct injection of cooker flash vapor, introducing the partially heated mixture into the cooker (16), injecting high pressure steam into the mixture for final heating to the desired cooking temperature while maintaining the pressure sufficiently high in the cooker by restricting the outlet of the cooker and then flashing the mixture through one or more flash chambers (19) each of which is connected to a preheating unit for utilization of the flashed vapor. With one stage of preheat, the high pressure steam requirement is 55%, two stages 38%, and three stages 29%. The fraction of high pressure steam needed corresponds to a fraction represented by 1.15/n+1 where n is the number of preheat vessels or stages used. </p> |
