针对目前精馏法处理TDI水解氯废水能耗高和能量利用率低的问题,以某化工厂TDI含氯废水为研究对象,建立自回热精馏技术提纯工艺。含有TDI及水解氯等重组分的原料液经进料泵送至产品塔进行连续精馏,从顶部分离出TDI产品,冷凝的物料进入回...针对目前精馏法处理TDI水解氯废水能耗高和能量利用率低的问题,以某化工厂TDI含氯废水为研究对象,建立自回热精馏技术提纯工艺。含有TDI及水解氯等重组分的原料液经进料泵送至产品塔进行连续精馏,从顶部分离出TDI产品,冷凝的物料进入回流罐,冷凝成液相也进入回流罐,再通过回流泵一部分回流入塔,另一部分采出,采出的TDI产品输送出界区。塔釜采出TDI和少量水解氯重组分,通过塔釜泵采出后输送出界区。采用Aspen Plus V11流程模拟软件对此流程进行模拟,确定了最优进料位置选第10块塔板,理论塔板数为15块塔板,回流比为1.0,塔顶基本没有水解氯存在,达到了要求的塔顶TDI含量≥99.90%、水解氯含量≤0.001 5%。基于自回热精馏降解TDI生产水解氯技术,仅需192 kW的电耗即能维持整个装置的正常运行,运行费用从614.4万元降为214.7万元,每年可降低65.06%的成本。展开更多
The synthetic reaction of HDI biuret polyisocyanate was monitored by gel permeation chromatography (GPC). The best reaction process was selected according to the percent age of HDI biuret, and the influence of operati...The synthetic reaction of HDI biuret polyisocyanate was monitored by gel permeation chromatography (GPC). The best reaction process was selected according to the percent age of HDI biuret, and the influence of operation conditions on product was also analysed. The results demonstrated that the method of using steam with hexamethylene diisocyanate (HDI) monomer is the best process.Reaction temperature is controlled at 120?℃ and reaction time is controlled at about 7 hours.展开更多
文摘针对目前精馏法处理TDI水解氯废水能耗高和能量利用率低的问题,以某化工厂TDI含氯废水为研究对象,建立自回热精馏技术提纯工艺。含有TDI及水解氯等重组分的原料液经进料泵送至产品塔进行连续精馏,从顶部分离出TDI产品,冷凝的物料进入回流罐,冷凝成液相也进入回流罐,再通过回流泵一部分回流入塔,另一部分采出,采出的TDI产品输送出界区。塔釜采出TDI和少量水解氯重组分,通过塔釜泵采出后输送出界区。采用Aspen Plus V11流程模拟软件对此流程进行模拟,确定了最优进料位置选第10块塔板,理论塔板数为15块塔板,回流比为1.0,塔顶基本没有水解氯存在,达到了要求的塔顶TDI含量≥99.90%、水解氯含量≤0.001 5%。基于自回热精馏降解TDI生产水解氯技术,仅需192 kW的电耗即能维持整个装置的正常运行,运行费用从614.4万元降为214.7万元,每年可降低65.06%的成本。
文摘The synthetic reaction of HDI biuret polyisocyanate was monitored by gel permeation chromatography (GPC). The best reaction process was selected according to the percent age of HDI biuret, and the influence of operation conditions on product was also analysed. The results demonstrated that the method of using steam with hexamethylene diisocyanate (HDI) monomer is the best process.Reaction temperature is controlled at 120?℃ and reaction time is controlled at about 7 hours.
