合成树脂及塑料
閤成樹脂及塑料
합성수지급소료
CHINA SYNTHETIC RESIN AND PLASTICS
2014年
4期
52-54
,共3页
聚乙烯%细粉%质量控制
聚乙烯%細粉%質量控製
취을희%세분%질량공제
polyethylene%fines%quality control
聚乙烯装置自投产以来，产品中夹带细粉现象日趋明显，用户反映细粉含量问题的频次也有增加。结合系统流程实际情况，观察生产全过程聚乙烯颗粒外表面的变化，找出产生细粉的原因，如聚乙烯产品经过掺混、转贮等工序时，颗粒表面受到摩擦、撞击等外力作用后产生毛刺，在风送过程中毛刺脱落形成细粉。通过优化淘析器除尘效果、增加淘析器空气补充量、定期清除料仓积聚细粉、减少风送系统粒子阻力、实施成品罐不掺混方案等，使细粉含量多的问题得到解决。
聚乙烯裝置自投產以來，產品中夾帶細粉現象日趨明顯，用戶反映細粉含量問題的頻次也有增加。結閤繫統流程實際情況，觀察生產全過程聚乙烯顆粒外錶麵的變化，找齣產生細粉的原因，如聚乙烯產品經過摻混、轉貯等工序時，顆粒錶麵受到摩抆、撞擊等外力作用後產生毛刺，在風送過程中毛刺脫落形成細粉。通過優化淘析器除塵效果、增加淘析器空氣補充量、定期清除料倉積聚細粉、減少風送繫統粒子阻力、實施成品罐不摻混方案等，使細粉含量多的問題得到解決。
취을희장치자투산이래，산품중협대세분현상일추명현，용호반영세분함량문제적빈차야유증가。결합계통류정실제정황，관찰생산전과정취을희과립외표면적변화，조출산생세분적원인，여취을희산품경과참혼、전저등공서시，과립표면수도마찰、당격등외력작용후산생모자，재풍송과정중모자탈락형성세분。통과우화도석기제진효과、증가도석기공기보충량、정기청제료창적취세분、감소풍송계통입자조력、실시성품관불참혼방안등，사세분함량다적문제득도해결。
Since polyethylene unit was put into operation, the phenomenon of fines entrainment in products had become increasingly obvious, which resulted in the users' frequent feedback on fine content problems. The reasons were finally found out in combination with the practical situation of the system flow and the observation of polyethylene particle appearance changes in the whole process. Fines were generated because burr which formed on the particle surface due to external force such as friction and impact during the process of blending and storage came off in the air conveying system. The problems of large content of fines were resolved successfully through optimizing dust removal effect of the elutriation device, adding air supply in the elutriator, regularly purging the fines gathered in the stock bin, reducing the particles' resistance of air conveying system, implementing the plan of not blending in the products tank, etc.
