The utility model discloses a heat exchange system of the casting flume of the BOPP production line, which consists of a closed loop composed of a main flume, a tube heat exchanger, a casting cooling tank, a pipeline and a valve. The tube heat exchanger circulates the cooling water through the outside of the valve. The characteristics of the system are that a set of multi-row heat exchange coils and a set of primary filter units are added to the casting cooling tank for external circulation cooling. \u3002 Applying the heat exchange system of the utility model, the heat transfer capacity is greatly improved by reasonably adding the tubular heat exchanger and multi-row flake heat exchange coils in the closed loop, and the flexible switching ability of the two tubular heat exchangers in series sharing, single machine use and single machine maintenance is endowed. The non-woven filter can be replaced efficiently and easily by introducing the primary filter unit, which ensures that the non-woven filter can be replaced efficiently and easily. The heat transfer velocity is more conducive to energy saving and emission reduction of production enterprises.
【技术实现步骤摘要】
BOPP生产线铸片水槽的换热系统
本技术涉及一种薄膜卷制造设备的辅助配件,尤其涉及一种BOPP生产线铸片水槽的换热系统。
技术介绍
BOPP薄膜的生产是将高分子聚丙烯的熔体首先通过狭长机头制成片材或厚膜,然后在专用的拉伸机内,在一定的温度和设定的速度下,同时或分步在垂直的两个方向(纵向、横向)上进行的拉伸,并经过适当的冷却或热处理或特殊的加工(如电晕、涂覆等)制成的薄膜。如图1所示,BOPP铸片水槽的换热系统通常是通过单台筒式换热器专门给铸片冷却槽的水进行热交换,使水槽的水温达到工艺设定温度。连续生产时,由于薄膜中不断有析出物融入到水槽里,在水中形成众多乳状粘连物,这些乳状粘连物给生产造成两方面影响:一是乳状粘连物经过内循环堵在系统过滤器的滤网上,造成系统循环水流量下降,导致厚片冷却不良,使厚片结晶没有达到最佳效果,在后道拉伸过程中破膜或产生其他质量问题;另一方面,这种乳状粘连物还会附着在筒式换热器的换热管表面,造成换热器换热能力下降,影响换热效果,导致水槽的温度达不到设定标准,从而影响正常生产。针对这样的问题,常用的解决方法是加开冷冻泵、冷却泵,调低冷冻机的出水 ...
【技术保护点】
1.BOPP生产线铸片水槽的换热系统,由主水槽、筒式换热器、铸片冷却槽、管路及阀门相接构成闭环,其中筒式换热器通过阀门外接循环供冷的冷冻水,其特征在于:所述铸片冷却槽中增设有一组外接循环供冷的多排片形换热盘管和一组初级过滤单元。
【技术特征摘要】
1.BOPP生产线铸片水槽的换热系统,由主水槽、筒式换热器、铸片冷却槽、管路及阀门相接构成闭环,其中筒式换热器通过阀门外接循环供冷的冷冻水,其特征在于:所述铸片冷却槽中增设有一组外接循环供冷的多排片形换热盘管和一组初级过滤单元。2.根据权利要求1所述BOPP生产线铸片水槽的换热系统,其特征在于:所述多排片形换热盘管与一台筒式换热器的换热能力相当。3.根据权利要求1所述BOPP生产线铸片水槽的换热系统,其特征在于:所述初级过滤单元由设于铸片冷却槽中部的不锈钢编织网及其上贴附的无纺布滤片组成。4.根据权利要求3所述BOPP生产线铸片水槽的换热系统,其特征在于:所述无纺布滤片为可更换贴附于不锈钢编织网上,且无...
【专利技术属性】
技术研发人员:向红,王维兵,
申请(专利权)人:苏州昆岭薄膜工业有限公司,
类型:新型
国别省市:江苏,32
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