把木头锯成木板,有35-40％的木材变成了废料。为了把它们运到垃圾场,企业部门每年要浪费掉好多钱。可是,这些废料是贵重的原料。把锯屑装满在一个两端缩小的大钢筒中。然後,在大的压力下通入蒸汽。在蒸汽的作用下,使针叶树木材细胞里含有的不溶性型糖开始转化为可溶性糖。但是,这个过程进行得非常缓慢。为了加速反应,同时往钢筒中通入蒸汽和热硫酸溶液,硫酸在这种情况下只起催化剂的作用。催化剂是一种只加速反应、不参与反应的物质。封闭很严的钢筒是木材加工-水解-的主要设备。溶解了的糖-水解产物,从钢筒下部放出,进入蒸发器。然後进入另一设备中,加入石灰乳,把硫酸分离出来,再使它冷却。再往水解产物中添加酵母,使它开始发酵,转 Sawing wood into planks has 35-40% of wood turned into scrap. In order to transport them to landfills, the corporate sector has to waste a lot of money every year. However, these wastes are precious raw materials. Fill the sawdust in a large steel cylinder with both ends narrowed. Then, steam is introduced under a large pressure. Under the influence of steam, insoluble sugars contained in the cells of the conifer wood are converted into soluble sugars. However, this process is very slow. In order to speed up the reaction, steam and hot sulfuric acid solution are introduced into the steel cylinder at the same time. In this case, sulfuric acid only acts as a catalyst. The catalyst is a material that only accelerates the reaction and does not participate in the reaction. The tightly closed steel cylinder is the main equipment for wood processing-hydrolysis. The dissolved sugar-hydrolysate is discharged from the lower part of the steel cylinder and enters the evaporator. Then go to another facility, add milk of lime, separate the sulfuric acid, and let it cool. Add yeast to the hydrolysate to start fermentation.