【正文】 hlorination. Process because of a mechanical vacuum method is relatively short, less equipment and instrument characteristics, and the vacuum created by mechanical vacuum pump high vacuum dechlorination system, stable operation, dechlorination effect, power consumption, small, light salt water after dechlorination chlorine in the 10 rng / L below, can be effectively used to save chemical dechlorination sodium sulfite, and prolapse of more than 95% purity of chlorine gas, chlorine gas mains can be incorporated into the recovery and improve the utilization of chlorine. Dechlorination of PVC production and technological aspects of dilute brine, should be based on local conditions, the principles of energy saving design the III appropriate process route. To achieve the best economic results. This design from the perspective of the preliminary design of chemical plant with an annual output 100,000 tons pvc prehensive design, project design results meet the basic requirements of design, pvc pleted the preliminary design of production plants, carried out feasibility studies, pleted the materials , heat, equipment, and other related calculations. Keywords: PVC Light salt Dechlorination Vacuum IV 目 錄 摘要 ..................................................................................................................................I Abstract ........................................................................................................................... II 目 錄 ......................................................................................................................... IV 1 綜述 ....................................................................................................................... 1 PVC 的物理和化學(xué)性質(zhì) ............................................................................... 1 PVC 的生產(chǎn)技術(shù)發(fā)展 ................................................................................... 1 產(chǎn)需情況 ....................................................................................................... 2 生產(chǎn)方法 ................................................................................................... 3 1． 4． 1 懸浮聚合法 .................................................................................... 3 1． 4． 2 乳液聚合法 ...................................................................................... 4 1． 4． 3 本體聚合法 .................................................................................... 4 1． 5 新產(chǎn)品研制進(jìn)展 .......................................................................................... 5 1． 5． 1 氯乙烯 醋酸乙烯共聚糊樹脂 ........................................................... 5 1． 5． 2 氯化聚氯乙烯 ................................................................................. 5 1． 5． 3 氯化聚乙烯 .................................................................................... 5 1． 5． 4 輻射交聯(lián)聚氯乙烯 .......................................................................... 6 1． 5． 5 聚氯乙烯納米塑料 ........................................................................ 6 1． 5． 6 硅灰石 /PVC 復(fù)合材料 ..................................................................... 7 1． 6 PVC 樹脂的主要用途 ................................................................................ 7 1． 6． 1 PVC 一般軟制品 ............................................................................. 7 1． 6． 2 PVC 薄膜 ....................................................................................... 8 1． 6． 3 PVC 涂層制品 ................................................................................ 8 1． 6． 4 PVC 泡沫制品 ................................................................................ 8 1． 6． 5 PVC 透明片材 ................................................................................ 8 1． 6． 6 PVC 硬板和板材 ............................................................................. 8 1． 6． 7 PVC 其它 ....................................................................................... 9 1． 7 PVC 的危害 .............................................................................................. 9 1． 8 對我國 PVC 發(fā)展的展望 .......................................................................... 10 1． 8． 1 PVC 生產(chǎn)裝置向大型化發(fā)展 ......................................................... 10 1． 8． 2 加強(qiáng)生產(chǎn)技術(shù)及設(shè)備研制與應(yīng)用 ................................................... 10 1． 8． 3 加強(qiáng)新產(chǎn)品的開發(fā) ........................................................................ 11 1． 8． 4 PVC 制品的開發(fā)和應(yīng)用技術(shù) ......................................................... 11 2 設(shè)計工藝計算 ....................................................................................................... 12 主要設(shè)備物料衡算 ......................................................................................... 12 計算依據(jù) .............................................................................................. 12 2． 1． 2 脫氯塔物料衡算 .............................................................................. 12 2． 1． 3 換熱器物料衡算 ........................................................................... 16 2． 2 主要設(shè)備熱量衡算 ....................................................................................... 17 2． 2． 1 脫氯塔熱量衡算 .............................................................................. 17 2． 2． 2 換熱器熱量衡算 .............................................................................. 18 2． 3 換熱器的設(shè)備選型和工藝計算 ............................................................................ 20 V 2． 3． 1 試算和初選換熱器的型號 ...................................................