摘要
以24头/位熔体直纺涤纶长丝装置为例,探讨了装置中熔体输送系统的设计技术要点和设计方法。结果表明:熔体输送系统的设计中,确保管道长度、管径以及熔体的流速、平均停留时间、压力降和温升等在最佳值或合理的范围,才能满足纺丝生产要求;在熔体输送配管中间增加增压泵,可使聚酯熔体进入计量泵前的熔体压力在6 MPa以上;聚酯熔体在输送过程中,除了压力降引起温升变化外,熔体通过增压泵和计量泵也会引起温升变化,可在增压泵后加装熔体冷却器将熔体温度控制在280~292℃。
The design technical keys and design methods of melt conveying system were discussed by using 24 head/position direct melt spinning polyester filament plant. The results showed that the pipehne length, pipe size, the melt flow rate, average resident time, pressure drop and temperature rise should be optimized or controlled within a rational range in the design of melt conveying system in order to satisfy the spinning requirement; the melt pressure could be raised above 6 MPa through a booster pump before the polyester melt entered the metering pump; the booster pump and metering pump would cause the temperature rise except the pressure drop during the polyester melt conveying process, so a melt cooler should be introduced after the booster pump to control the melt temperature of 280 -292℃.
出处
《合成纤维工业》
CAS
2017年第6期70-72,共3页
China Synthetic Fiber Industry
