METHOD AND APPARATUS FOR ADDING STEAM FOR A STEAM EXPLOSION PRETREATMENT PROCESS

摘要

A method for treating cellulosic biomass feed stock including: feeding the feed stock to an upper inlet of a vertical reactor vessel, wherein the feed stock is deposited on a pile of feed stock within the vertical reactor vessel; adding heat energy to heat the feed stock by injecting steam to an upper region of the vertical reactor vessel; propelling the feed stock through an outlet in a lower region of the vertical reactor vessel by injecting steam into the biomass at, near or after the bottom outlet of the vertical reactor vessel, and moving the propelled feed stock through an expansion device, such as a steam explosion device, to subject the feed stock to a steam explosion process.

主权项

1. A method for treating biomass feed stock comprising:
feeding the feed stock through a pressure isolation device and to an upper inlet of a vertical reactor vessel system, wherein the feed stock is deposited on a pile of feed stock within the vertical reactor vessel; adding heat energy to heat and pressurize the feed stock by injecting a first steam volume to an upper region of the vertical reactor vessel system; propelling the feed stock through an outlet in a lower region of the vertical reactor vessel system by injecting at least a second steam volume into the biomass at an elevation corresponding to the lower region of the vertical reactor vessel at, near or after the bottom outlet of the vertical reactor vessel; wherein the injection of the first steam volume and the injection of the at least second steam volume are vertically separated by at least a portion of the biomass column, and moving the propelled feed stock through an expansion device to subject the feed stock to a steam explosion process.