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1.前言 木材作为人类最古老的能源,在北美许多地方非常丰富,例如:美国的森林覆盖率为32％,加拿大为35％。研究表明,美国每年可利用的废弃木材(工厂废料、伐木残渣、无商业价值的原木、枯木等)所含的能量达(20.9～31.4)×10~(14)kJ,如包括木材种植场的产量,预计未来可利用的木质燃料在(31.4～94.9)×10~(14)kJ。我国森林每年可提供约9000万吨废弃木材,但年实际开发量为1.8亿吨,据1989年统计,用于生活烧掉的废木材约2.78亿吨。林业加工过
1. Introduction Wood is the oldest energy source in mankind and is abundant in many parts of North America. For example, the forest coverage in the United States is 32% and in Canada 35%. Studies show that the available energy (20.9 ~ 31.4) × 10 ~ (14) kJ per year available in the United States for waste wood (factory waste, logging residues, commercial logs, dead wood, etc.) Output, the expected future availability of wood fuel in the (31.4 ~ 94.9) × 10 ~ (14) kJ. The forest in our country can provide about 90 million tons of discarded timber annually, but the annual actual development volume is 180 million tons. According to 1989 statistics, about 278 million tons of wasted wood are burned for life. Forestry processed