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环氧氯丙烷作为重要的化工中间体,是环氧树脂和某些精细化工品的主要原料,但是现有醋酸丙烯酯法生产装置的能量利用存在部分不合理的环节,为了降低能耗、减少蒸汽消耗,提高其市场竞争力,本文首先依据夹点技术原理,对现有醋酸丙烯酯法生产环氧氯丙烷工艺进行了研究;通过工艺流程模拟软件(ASPEN PLUS)和换热网络计算软件(ASPEN ENERGYANALYZER)的分析,确定了原有醋酸丙烯酯法生产环氧氯丙烷的工艺流程中存在的瓶颈,并提出了优化的换热网络;进而,对整体工艺流程进行能量利用优化,通过引入蒸汽喷射式热泵实现跨越夹点的换热,进一步降低了生产过程中的能耗。研究结果表明,上述能量利用优化的节能效果显著,优化后的换热网络比原有工艺流程中的换热网络节省蒸汽消耗18.8%,节省循环水消耗26.6%。
As an important chemical intermediate, epichlorohydrin is the main raw material of epoxy resin and some fine chemicals. However, there are some unreasonable links in the energy utilization of the existing propylene acetate production plant. In order to reduce energy consumption and reduce Steam consumption, improve their market competitiveness, this paper first based on the principle of pinch point technology, the existing propylene oxide production of epichlorohydrin process were studied; process simulation software (ASPEN PLUS) and heat transfer network computing software ASPEN ENERGYANALYZER) to determine the existing bottlenecks in the production of epichlorohydrin propylene acetate process and proposed an optimized heat exchange network; and then the overall process of energy use optimization, by introducing steam Jet heat pump to achieve across the pinch of the heat, to further reduce the energy consumption in the production process. The results show that the optimized energy saving effect is remarkable. The optimized heat exchange network saves 18.8% of steam consumption and 26.6% of recycled water consumption compared with the heat exchange network in the original process.