Full-cycle dynamic optimization method for industrial ethylene cracking furnace based on surrogate model
A technology of ethylene cracking furnace and proxy model, which is applied in the field of full-cycle dynamic optimization of industrial ethylene cracking furnaces, can solve problems such as the lack of implementation precedents in this area, and achieve the effect of preventing overfitting
Active Publication Date: 2015-09-09
EAST CHINA UNIV OF SCI & TECH
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[0004] In order to further improve the operation level of ethylene cracking furnaces, it is of great significance to implement full-cycle dynamic optimization research on industrial ethylene cracking furnaces. Through literature search and patent system, it is found that there is no precedent for this aspect in industrial applications at present, so make full use of on-site operations It is of great significance to develop the full-cycle dynamic optimization technology of industrial ethylene cracking furnaces by combining historical data with neural network proxy models of cracking furnaces, data mining and parameter estimation technology
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[0031] A kind of full-cycle dynamic optimization method of an industrial ethylene cracking furnace based on a proxy model in this specific embodiment takes naphtha cracking as an example, but it is not limited to this, and it can also be used with gas phase raw materials, light naphtha, fuel oil, etc. Various cracking raw materials such as hydrogen tail oil and light diesel oil.
[0032] The industrial ethylene cracking furnace system of this concrete example is as figure 1As shown, the cracking raw material is preheated in the convection section of the cracking furnace, and then further overheated with the dilution steam in the convection section, and the hydrocarbon / steam mixture reaches about 500-600°C and enters the radiant tube of the cracking furnace. The fuel gas burns in the furnace, transfers heat to the radiant tube of the cracking furnace, and further heats the perhydrocarbon / steam mixture in the radiant section. At the outlet of the radiant section, the temperature...
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The invention relates to a complete period dynamic optimization method for an industrial ethylene cracking furnace and based on a surrogate model. By simulating the mechanism of the industrial ethylene cracking furnace and utilizing an experimental design principle, a certain amount of simulation data is generated, then a neural network surrogate model is utilized to carry out modeling. By employing the neural network surrogate model and combining iterative computation update of the thickness of a coking layer in a furnace tube, a complete period dynamic model of the cracking furnace is obtained. Based on the complete period dynamic model of the cracking furnace, the complete period dynamic optimization method for the cracking furnace is provided, then a constructed continuous dynamic optimization model is approximately solved by means of a piecewise linear representation method. Compared with experiential operation, dynamic optimization is substantially greater in economic benefit. The complete period dynamic optimization method is simple in theory, reasonable in derivation, high in engineering usability, easy to transplant and wide in adaptability, and is simple and practicable.
Description
technical field [0001] The invention relates to an agent model-based full-cycle dynamic optimization method for an industrial ethylene cracking furnace. Background technique [0002] The ethylene industry has always occupied the core position of the petrochemical industry, and the ethylene output is an important symbol to measure the comprehensive industrial level of a country. As the leader of the ethylene plant, the ethylene cracking furnace has an important impact on the yield and output of key products such as ethylene, and its operating status and operating level have an important impact on the yield and output of key products such as ethylene. Therefore, improving the operating level of the ethylene cracking furnace and optimizing its operation are key An important way of device efficiency. Ethylene cracking furnace converts cracking raw materials such as liquefied petroleum gas, ethane, propane, light naphtha, naphtha, hydrogenated tail oil and light diesel oil into ...
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IPC IPC(8): G05B19/418C10G9/00
CPCY02P90/02
Inventor 钱锋李进龙杜文莉王振雷叶贞成
Owner EAST CHINA UNIV OF SCI & TECH