Patent ID: 9404135
Filing Date: 2016-08-02
CPC Classification: B08B,C10G,C10L,C12P,C13K,Y02E,Y02P

Claim Text:
1. A biomass decomposition apparatus that decomposes a biomass material containing cellulose, hemicellulose, and lignin, the apparatus comprising: a biomass feeding unit that feeds a biomass material; a vertical decomposition unit that decomposes the biomass material while bringing the biomass material into counter contact with treat water, transfers soluble fractions into an effluent, which is treat water to be discharged, and separates a lignin component and a hemicellulose component from the biomass material so as to produce a biomass solid, the decomposition unit including: an inlet for receiving biomass material fed by the biomass feeding unit; an outlet provided above the inlet, for discharging the biomass solid; a screw including a rotation shaft and a spiral flight, for transporting the biomass material from the inlet to the outlet, the rotation shaft being provided in a longitudinal direction of the vertical decomposition unit; and a treat water inlet for supplying the treat water; a biomass discharging unit that discharges the biomass solid from the outlet; and a solid-liquid separator that is provided below the inlet and discharges the effluent, wherein a scraping unit for contacting the solid-liquid separator so as to scrape the biomass material is provided on an end of the spiral flight of the screw, the scraping unit being provided at a position associated with the solid-liquid separator, and the solid-liquid separator includes a filter provided with a plurality of slits which are horizontal stripes vertical to the rotation shaft and each of the slits has an entrance width smaller than an exit width.