Atmospheric-pressure continuous lignocellulose biomass pretreating process

The invention discloses an atmospheric-pressure continuous lignocellulose biomass pretreating process. The atmospheric-pressure continuous lignocellulose biomass pretreating process comprises the following steps: (1) cutting dry lignocellulose biomass till 1-10 cm; (2) preheating SO3 micro-thermal explosion continuous pretreatment equipment to 40-80 DEG C, adding the lignocellulose biomass, inflating a certain amount of SO3 gas, and performing atmospheric-pressure treatment at 40-80 DEG C for 0.5-3 h; (3) adding the lignocellulose biomass treated in the step (2) into a dilute alkali solution, treating at 40-90 DEG C for 0.5-3 h, filtering, washing by using water till being neutral, and drying. By the atmospheric-pressure continuous lignocellulose biomass pretreating process, continuous operations can be achieved and the production efficiency can be improved; the atmospheric-pressure continuous lignocellulose biomass pretreating process is a pretreating method which is simple, feasible, low in investment, high in efficiency and low in energy consumption; the pretreated holocellulose dried product has the yield of higher than or equal to 55%, the lignin content of lower than or equal to 5%, the holocellulose content of higher than or equal to 85% and the loss rate of lower than or equal to 11%.