A Complete Set of Optimal Control Method for Ethylene Cracking Furnace

Abstract

The invention discloses a set of optimization control methods of an ethylene cracking furnace. The set of optimization control methods of the ethylene cracking furnace comprises the following steps of establishing a cracking depth model, implementing COT advanced control, optimizing key technology parameters, realizing integrated application, establishing a combustion chamber flame diagnostic system, and establishing a cracking furnace energy management system. By the adoption of the set of optimization control methods of the ethylene cracking furnace, efficiency of ethylene and propylene (or diene) is improved, and energy consumption of the ethylene cracking furnace is reduced. Optimization control over the realizing process reduces severer interference, caused by frequent manual operation, to the COT, the fluctuation amplitude of operation conducted when events, such as reduction of the fuel gas pressure and dryer switching occur is reduced, and therefore the level of the stableness rate of the COT of the whole device remains high. The cracking depth model of the cracking furnace is established, and operation conditions of different cracking working conditions are optimized, so that the yield of the diene is in a high level, and energy conservation and optimization of the cracking furnace are realized.

Description

technical field [0001] The invention relates to a control method, in particular to a complete optimization control method for an ethylene cracking furnace. Background technique [0002] The ethylene cracking furnace is the core equipment of the ethylene plant. Different cracking raw materials correspond to different furnace types and have different optimal process operating conditions. Under the premise of yield, there is its most suitable cracking temperature, feed amount and dilution ratio, and the cracking depth model is needed to evaluate the raw materials to determine the best process operating conditions. [0003] From the cracking raw material to the output of ethylene and propylene, the main qualitative change process is completed in the cracking furnace. The stable, long-period and high-load production of the cracking furnace is the guarantee for the normal operation of the ethylene plant. Calorific value fluctuations caused by fuel gas fluctuations, compositional...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the energy consumption of the cracking furnace in the existing ethylene cracking furnace control method is high, and the total feed flow rate of the cracking furnace fluctuates greatly during normal operation and lifting.

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