《制浆造纸工艺学 Pulping Process》课程教学资源：第七章 废纸制浆 Secondary Fiber Recycling

废纸制浆 Secondary Fiber Recycling

废纸制浆 Secondary Fiber Recycling

第一节概述 ◆废纸制浆流程 ◆根据废纸的特征及纸浆的使用方向,当前废 纸制浆可以分为2种流程,即非脱墨浆流程和 脱墨浆流程。 ◆非脱墨浆流程 A·废纸一碎浆年维分离粗洗涤一精选 净化一调整一供抄造用 ◆脱墨浆流程 ◆废纸一碎浆—粗选一浓缩—揉搓或纤维分离 脱墨——一精选一净化一调整一供抄造用

第一节 概 述  废纸制浆流程  根据废纸的特征及纸浆的使用方向，当前废 纸制浆可以分为2种流程，即非脱墨浆流程和 脱墨浆流程。  非脱墨浆流程  废纸 碎浆 纤维分离 粗选 洗涤 精选 净化 调整 供抄造用  脱墨浆流程  废纸 碎浆 粗选 浓缩 揉搓或纤维分离 脱墨 精选 净化 调整 供抄造用

废纸回用的背景 Global Paper and Board Consumption Over the past twenty years, global paper and paperboard consumption has grown 3. 3% a year or a total of 150 million tons. Milllion tons 350 +3.1%/a Other paper and paperboard +3.4%/a Cartonboard materials Printing and Writing pape Newsprint 1980 1985 1990 20

一、废纸回用的背景

Global Paper and Board Consumption There is no reason to believe that the global consumption of paper and paperboard does not continue to grow. We forecast 2.9 %la growth until 2010. Million tons 450 Fo +2.9%/a Other paper and paperboard Cartonboard 350 300 Corrugating materials 200 Tissue Printing and Ing pap Newsprint 1980 1985 1990 1995 2000 2005 2010

Global Paper and board consumption Paper and board consumption is growing rapidly in Non-Japan Asia and it will soon become as important consuming region as North America and Europe. Million tons 20 14%阳 28%/a 4.9%/a 13%/a 4.3%/a Europe Non-Japan Asia Latin America

Global Paper and Board consumption The growth in global paper and paperboard consumption will provide more paper for recycling Million tons 450 100 milion tons more 300 1980 1985 1990 1995 2000 2005 2010

Global Paper and board Production North America and Europe dominate global paper and board production, but Non-Japan Asia has been the fastest growing region Million tons Oceania Africa atin America Non-Japan Asia Eastern Europe Western Europe Nordic Countries North America 1980 1984 1986 1988 1990 1994 1996 2000

Production and Consumption nillion 2003 USA China Japan Production(P&B) 80.2204300030.295 Consumption (P&B) 881494806030.797 Per capita consumption (kg) 300.8 358241.9 China's P&b production and consumption are ranking in the second position worldwide

2003 USA China Japan Production (P&B) Consumption (P&B) Per capita consumption (kg) 80.220 88.149 300.8 43.000 48.060 35.8 30.295 30.797 241.9 Production and Consumption *China’s P&B production and consumption are ranking in the second position worldwide. (million t)

二、废纸回用的意义 1、节约原料,增加生成 全世界木材年需求量20亿M以上,年增 长率不低于25%;生产1T再生新闻纸浆比生 脱墨浆比生产1漂白化学浆节约木材5 产1T磨木浆节约木材2M3,生产1高白度废 2、减少污染,保护环境 废水的污染负荷轻,耗水量少,无废气污 染,减少木材砍伐率,有利于生态平衡和保 护环境

二、废纸回用的意义 1、节约原料，增加生成 全世界木材年需求量20亿M 3以上，年增 长率不低于25％；生产1T再生新闻纸浆比生 产1T磨木浆节约木材2M3，生产1T高白度废纸 脱墨浆比生产1T漂白化学浆节约木材5M3 。 2、减少污染，保护环境 废水的污染负荷轻，耗水量少，无废气污 染，减少木材砍伐率，有利于生态平衡和保 护环境

3、节省能源,降低能耗 生产1T再生新闻纸浆比生产1T磨木 浆节约能耗75%左右,生产1T高白度脱 墨浆较生产1T化学浆节约能耗50%以上 Y4、节约投资,降低成本 投资只需原浆浆厂的25-30%,废 类A水处理设施的投资低于原浆浆厂,废纸 浆的原材料成本、能耗、投资低,其生 产成本比原浆低

3、节省能源，降低能耗 生产1T再生新闻纸浆比生产1T磨木 浆节约能耗75％左右，生产1T高白度脱 墨浆较生产1T化学浆节约能耗50％以上。 4、节约投资，降低成本 投资只需原浆浆厂的25－30％，废 水处理设施的投资低于原浆浆厂，废纸 浆的原材料成本、能耗、投资低，其生 产成本比原浆低