A Production Batch Scheduling Control Method for Improving Operational Efficiency of Large Ethylene Cracking Furnace

Abstract

The invention provides a production batch dispatching and controlling method for improving the operating efficiency of a large-scale ethylene cracking furnace. The production batch dispatching and controlling method comprises the following steps: establishing a production database of ethylene cracking operation; collecting the physical parameters of materials in an ethylene cracking industrial site, real-time operating conditions and data of market, stock and expense; establishing a production batch dispatching and controlling model of which the objective is the maximized total production net profit of the ethylene cracking operation in the production planning period; solving and correcting the production batch dispatching and controlling model; transmitting a corrected production batch dispatching and controlling scheme to a two-grade process control system. The production batch dispatching and controlling method disclosed by the invention is mainly used for deciding and controlling the production batch length of each cracking furnace, the decoking rhythm, the distribution of each raw material between the cracking furnaces and the material balance, so that the production operation efficiency of the cracking furnace is improved, the coordination of the decoking operations of a plurality of cracking furnaces and the batch production are optimized, and the objective of the maximized net profit of the cracking operation is achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical process industry, and in particular relates to a production batch scheduling control method for improving the operating efficiency of a large-scale ethylene cracking furnace. Background technique [0002] The ethylene industry is the core of the petrochemical industry; ethylene is the basic raw material of the three major synthetic materials and fine chemical products, and is one of the largest chemical products in the world, accounting for more than 70% of petrochemical products. The world has taken ethylene production as one of the important symbols to measure the development level of a country's petrochemical industry. During the "Eleventh Five-Year Plan" period, my country's ethylene industry developed rapidly. By the end of 2011, my country's total ethylene production capacity reached 15.31 million tons per year, becoming the second largest ethylene producer in the world after the United Sta...

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Problems solved by technology

This patent only considers modeling of cracking dynamic process in one cracking cycle of a single device, operation optimization control and implementation, the control variables are dilution ratio and furnace tube outlet temperature parameters, and the goal is to minimize the energy consumption of cracking operation

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