樟木锯材汽蒸处理节能干燥及质量控制技术
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针对香樟木等珍贵难干树种干燥过程中存在的效率低、能耗高、质量不稳定及尾气环境友好性差等问题，系统研究高湿共沸应力释放与质量控制、微压控氧闭式循环干燥及尾气绿色处理与余热回收技术，形成樟木锯材汽蒸处理节能干燥及质量控制技术。本成果研发了高湿共沸应力释放与微压控氧闭式循环协同干燥技术，解决了干燥过程中应力释放、常规干燥开式循环能耗高、干燥质量不稳定等问题。木材干燥效率提高40-57%，干燥能耗降低18-25%，锯材干燥质量可达一级标准；研发了尾气绿色处理与余热回收技术，解决了高温干燥过程尾气余热浪费、环境友好性差的问题，尾气余热回收率80%，干燥过程基本无废气排放；在浙江升华云峰新材股份有限公司建成了年干燥能力3000m3生产示范线。
Aiming at the problems of low efficiency, high energy consumption, unstable drying quality and poor environmental friendliness of exhaust gas during the drying process of precious and hard-to-dry wood species such as camphor wood, this study systematically investigated technologies including stress release via high-humidity azeotropy and quality control, micro-pressure oxygen-controlled closed-cycle drying, green exhaust gas treatment and waste heat recovery, and developed the energy-saving drying and quality control technology for camphor sawn timber via steam treatment. Specifically, the collaborative drying technology integrating stress release via high-humidity azeotropy and micro-pressure oxygen-controlled closed-cycle was developed, which solves the issues of stress release during drying, high energy consumption of conventional open-cycle drying and unstable drying quality. As a result, the wood drying efficiency is increased by 40-57%, the drying energy consumption is reduced by 18-25%, and the drying quality of sawn timber reaches the first-class standard. Additionally, the green exhaust gas treatment and waste heat recovery technology was developed, which addresses the problems of waste heat waste and poor environmental friendliness caused by high-temperature drying. The waste heat recovery rate of exhaust gas reaches 80%, and basically no exhaust gas is emitted during the drying process. A production demonstration line with an annual drying capacity of 3000 m³ has been built in Zhejiang Shenghua Yunfeng New Materials Co., Ltd.
