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木材热泵烘干技术介绍,木材堆积需要隔条放置准确,材堆大小适宜,气流情况良好;烘干房内的木材材质与含水率情况一样或相近;烘干机内的木材厚度相差不应过大,当厚度相差显着时,应运用同一层木板厚度一致,以确保每一块板都能被隔条压住;隔条间隔应适当,以减少板材变形并确保气流晓畅;隔条应与材堆长度方向相笔直,各层隔条在高度方向上保持在一条笔直线上,并落在材堆或托盘的支持横梁上,要确保材堆内的正常通风与气流通道疏通;隔条旁边面离材堆端部的间隔应在一个隔条宽度内,隔条长度和材堆的宽度共同,隔条的宽度要求均匀。当烘干机内温度上升后,其蒸发温度也同步上升,因此,压缩机的进气跟排气的压差小,烘干作业非常轻松,寿命长,效率高,特别适合高温干燥场合。
在烘干设备堆积时,材堆之间前后间隔保持在10cm左右,以确保即便板材之间未对齐,也不会构成堵塞;在材堆深度方向,材堆旁边面与后墙、材堆与大门间要留有满足空间;在高度方向上,材堆顶部或所压重物距顶棚间隔控制在10~20cm左右;材堆长度方向与气流方向笔直,不允许将材堆长度方向顺着气流方向堆积;材堆形状为正六面体,两边应规整笔直,当锯材长度不一起,长的堆在材堆的下部和两边,短材应堆在材堆的中心和上部,以确保材堆的安稳性;顶风面必须装满材堆,不能出现空档,若材堆尺寸不能与烘干机匹配或烘干木材偏少时,能够穿插堆积材堆(合理调配),以避免气流短路,影响烘干质量;材堆堆积或叠放要规整、安稳,避免烘干过程中材堆坍毁形成事故。传统晾晒风干模式已经满足不了企业工业化大批量生产,主要是受季节限制,环境条件(温湿度环境)限制,卫生条件限制等。
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