流程模拟技术在加氢裂化装置上的应用

The Application of Process Simulation Technology in Hydrocrackers

加氢裂化是重质馏分油深度加工的主要工艺,航煤是加氢裂化装置的主要产品,故重点针对提高航煤产量进行优化应用分析。运用模型灵敏度工具对提高航煤外采量的影响因素进行分析,在操作条件允许的前提下,找出提高航煤产量的最佳控制点。应用Aspen Plus软件建立天津石化1.8Mt/a加氢裂化装置流程模拟模型,以航煤收率最大化为目标,应用模型对航煤收率的影响因素进行综合分析,提出优化措施。通过模拟计算结果对装置进行优化调整,取得了较好的效果:航煤终馏点(均值)由241℃提至253℃(均值),提高了12℃;航煤收率由19.7%提至22.5%,提高了2.8%。调整后,航煤终馏点和航煤收率均达到了预期目标,可实现年效益1234.8万元,在满足下游装置原料需求的同时,释放了加氢裂化装置高附加值产品的产能,提高了装置的经济效益。

Hydrocracking is the main technology used in deep processing of heavy distillates.Jet fuel is one of the main products from a hydrocracking unit.This article takes a look at the methods of optimizing a hydroc-racker to increase the yield of jet fuel.A model sensitifity tool is used to analyze the factors affecting the in-crease in jet fuel yield and to identify the optimal control point for increasing jet fuel output when operating conditions permit.The Aspen Plus software is used to develop a process simulation model for Sinopec Tianjin Company′ s 1.8Mt/a hydrocracking unit.With the purpose of maximizing jet fuel yield,the model is used to analyze the factors affecting the yield of jet fuel and measures to optimize hydrocrackers are proposed.Re-searchers optimized the operation of Sinopec Tianjin ′ s unit based on the modeling results and achieved good effect.The end point of distillation for jet fuel（mean value） was raised to 253 ℃ from 241℃ and the yield of jet fuel was increased to 22.5% from 19.7%.Both the end point of distillation and yield of jet fuel have reached the expected targets and this optimization could bring the company 12.35 million yuan in economic benefits annually.The optimization has helped maximize the production of high-value products while ensuring the demand for feedstock from downsream units and improved the unit ′s economic efficiency.