公开(公告)号：US20040060673A1

公开(公告)日：2004-04-01

申请号：US10611429

申请日：2003-12-09

Applicant: ANDRITZ INC.

Inventor： Joseph R. Phillips ,  Brian Greenwood ,  Bertil C. Stromberg ,  Thomas Pschorn

IPC: D21B001/36 ,  D21C007/06 ,  D21C007/08 ,  D21C009/02 ,  D21C007/12 ,  D21C003/02

CPC classification number: D21C3/20 ,  D21C3/24

Abstract: An apparatus and process for solvent pulping of cellulose-containing biomass utilizes at least one steaming vessel, a plug screw feeder or compression screw device, at least one super-atmospheric impregnation vessel, a solvent delignification reactor capable of operating at a pressure of 350 psig or more, and a solvent containing line for introducing solvent-containing liquor at the plug screw feeder outlet or compression screw device outlet. The process and system can also include at least one series connected pressure diffuser and optionally a retention tube downstream of each pressure diffuser to provide sufficient retention time to substantially preclude re-deposition of lignin on the cellulose fibers of the biomass, a blow tank connected to the last of the pressure diffusers and retention tubes, and vessels for multistage alcohol washing. The method steams the biomass and impregnates it with solvent to produce an aqueous slurry of biomass and solvent, delignifies the particulate biomass in the slurry, removes solvent while continuing delignification of the biomass in the slurry and while substantially precluding re-deposition of lignin on the cellulose of the biomass, reduces the pressure of the slurry; and then washes the slurry.

Abstract translation: 含纤维素生物质的溶剂制浆装置和方法利用至少一个蒸汽容器，插头螺旋进料器或压缩螺旋装置，至少一个超大气压浸渍容器，能够在350psig压力下操作的溶剂脱木素反应器 或更多，以及用于在塞子螺旋给料器出口或压缩螺旋装置出口处引入含溶剂的液体的含溶剂的管线。 该方法和系统还可以包括至少一个串联连接的压力扩散器和任选地在每个压力扩散器下游的保留管，以提供足够的保留时间，以基本上排除木质素在生物质的纤维素纤维上的再沉积，连接到 最后的压力扩散器和保留管，以及用于多级酒精洗涤的容器。 该方法将生物质蒸发并用溶剂浸渍以产生生物质和溶剂的水性浆料，使浆料中的颗粒生物质脱木质，除去溶剂，同时继续浆料中生物质的脱木质素，同时基本上排除木质素在 生物质的纤维素降低浆料的压力; 然后洗涤浆料。