粮食干燥机废气回收工艺技术研究与实践

Research and practice of waste gas recovery technology of grain dryer

根据植物性杂质与粉尘等废气的特性,结合粮食干燥机的特点,采用全封闭结构、负压粉尘杂质集中分离回收工艺,改变露天开放式的干燥作业方式,实现植物性杂质和粉尘的有序排放。经过生产验证,植物性杂质和粉尘回收率可达90%,能耗降低3%以上,既解决了废气排放超标等环境污染问题,还能将回收的废料加工成为生物质颗粒变废为宝,同时减少干燥机热量散失,提高干燥热效率。

According to the characteristics of plant impurities and dust and other waste gas,combined with the characteristics of the grain dryer,the fully closed structure and the centralized separation and recovery process of dust and impurities by negative pressure were used to change the open drying operation mode and achieve the orderly discharge of plant impurities and dust.Through the production verification,90%of plant impurities and dust can be recoveried,and more than 3%of source of energy can be saved.It can not only solve the environmental pollution problems such as excessive emission of exhaust gas,but also can turn waste into wealth during recycling waste processing into biomass particles.Moreover,the heat loss of dryer can be reduced,and the drying thermal efficiency can be improved.