乙烯裂解炉裂解深度在线优化研究与应用

Research and application of cracking severity online optimization for ethylene cracking furnace

针对乙烯裂解炉裂解深度优化问题,从双烯产品经济效益的角度出发提出了乙烯裂解炉双烯收率经济效益优化指标,通过优化该经济指标能够找到不同的裂解原料(石脑油)以及工艺参数条件下裂解炉运行的最佳裂解深度。同时在优化过程中引入了滚动优化思想,能够有效地克服双烯收率模型的不确定性以及工艺扰动。现场投用效果表明:本文提出的裂解深度优化策略是完全可行的,并取得了很好的经济效益。

For the optimization of ethylene cracking severity,an economical optimal index for ethylene and propylene yields was proposed.Optimization in such an economical index enabled to achieve an optimal cracking severity in Naphtha with different features and operational parameters.The introduction of an idea of receding-horizon optimization enabled to overcome the uncertainty from ethylene-and-propylene yield predictive model and the operating disturbance.Industrial application illustrated that the proposed optimization scheme is feasible and economical.