Modeling and optimization method for delayed coking process of residual oil

A technology of delayed coking and residual oil, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in providing data, and achieve the effect of good optimization effect, superior convergence, and short solution time.

Pending Publication Date: 2016-09-28
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

Because the model divides raw materials in a finer way, it is often difficult to provide corresponding data in industry, which brings great limitations to the practical application of the model.

Method used

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  • Modeling and optimization method for delayed coking process of residual oil
  • Modeling and optimization method for delayed coking process of residual oil
  • Modeling and optimization method for delayed coking process of residual oil

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Embodiment 1

[0044] This embodiment includes the following steps:

[0045] 1. Determine the parameters under specific temperature and pressure according to the industrial delayed coking unit: including design parameters (reactor length, diameter) and operating parameters (flow rate, switching time, etc.), and divide the raw materials into four sets according to the lump theory In total, the product is divided into 6 aggregates;

[0046] 2. Determine the kinetic model of delayed coking reaction

[0047] Using lump theory, considering the pressure and temperature of the reaction process are stable, a lumped kinetic model of delayed coking is established, the rate constant is calculated by the Arrhenius equation, and the reactor is approximated as a tubular reactor, regardless of the reaction The radial diffusion of the device, the product reaction rate equation is as follows:

[0048] Gas: dxG / dt=k SG x S +k AG x A +k RG x R +k BG x B

[0049] Liquefied petroleum gas: dx L / dt=k...

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Abstract

The invention relates to a modeling and optimization method for a delayed coking process of residual oil. Based on a lump theory modeling method, raw materials are divided into four lumps of a saturated component, an aromatic component, colloid and asphaltene; products are divided into six lumps of gas, liquefied gas, gasoline, diesel oil, wax oil and coke; stable pressure and temperature of a reaction process are considered; a delayed coking lump kinetics model is established; and raw material configuration and operation temperatures of multiple delayed coking apparatuses are optimized by adopting a differential evolution algorithm based on the model, so that the potential of an existing apparatus is brought into play, the overall benefit is increased, and guidance is provided for improving the running level of the delayed coking apparatus.

Description

technical field [0001] The invention relates to a modeling and optimization method for residual oil delayed coking process, and the method can be used for simulation and operation optimization of industrial delayed coking process. Background technique [0002] Residuum is the heaviest fraction in crude oil, and generally has an initial boiling point above 500°C. As domestic crude oil becomes more and more heavy and inferior, how to make better use of existing residual oil processing equipment to improve enterprise efficiency has become an urgent problem for refining and chemical enterprises. At present, residual oil processing equipment mainly includes residual oil hydrogenation, solvent deasphalting and delayed coking. Among them, delayed coking has the characteristics of simple process and low operating cost, and is currently the mainstream process for residual oil treatment. [0003] Delayed coking adopts the method of thermal cracking to convert heavy oil such as resid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 钱锋杨明磊杜文莉钟伟民
Owner EAST CHINA UNIV OF SCI & TECH
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