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Crude oil nonlinear optimization blending method based on expanded initialization range

A nonlinear optimization and nonlinear blending technology, applied in control/regulation systems, instruments, adaptive control, etc., can solve the problems of no solution in optimization, no solution in nonlinear optimization target optimization, trapped in local extreme values, etc.

Active Publication Date: 2018-08-17
南京富岛信息工程有限公司
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Problems solved by technology

This method mainly solves the problem that the nonlinear optimization target optimization has no solution or falls into a local extremum in the online blending process of crude oil
Solve the problem that crude oil is easy to fall into local extremum or optimization has no solution in the process of nonlinear optimal blending

Method used

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  • Crude oil nonlinear optimization blending method based on expanded initialization range
  • Crude oil nonlinear optimization blending method based on expanded initialization range
  • Crude oil nonlinear optimization blending method based on expanded initialization range

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and examples of implementation.

[0041] In the following, the detailed calculation process and specific operation flow are given based on the actual implementation of the present invention in a certain oil refining enterprise and in combination with a specific calculation example. The company mainly processes crude oils such as Jeno, Dar Mix, Basra Medium, Sand Heavy, Sand Middle, and Oman. In order to reduce production costs, it usually mixes low-sulfur crude oil and high-sulfur crude oil for processing. In order to reduce the corrosion degree of atmospheric and vacuum equipment for safe production, the acid and sulfur content of the blended crude oil must be controlled within the design parameters of the atmospheric and vacuum equipment. At the same time, in order to increase the octane number of gasoline produced by the secondary processing unit, the octane number of ...

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Abstract

The invention discloses a crude oil nonlinear optimization blending method based on an expanded initialization range. The method comprises the steps of expanding a formula range of m components participating in blending crude oil to generate an expanded formula range, generating 3m groups of initial mass ratios in an expanded formula upper limit range, an expanded formula lower limit range, a reduced formula range and the expanded formula range, thus carrying out optimization solution to obtain an optimized formula of component crude oil and calculating the feasibility of each optimized formula solution, forming feasible optimized formula solutions of the component crude oil into a set of optimized formula solutions, and selecting an optimal group of solutions as a final formula of the component crude oil according to the magnitude of a target function value in a crude oil nonlinear blending optimization algorithm. According to the crude oil nonlinear optimization blending method basedon partition initialization, the problem of easily falling into a local extremum or causing no solution of optimization when a nonlinear blending rule is used in an optimized property target in a crude oil online blending process is solved.

Description

technical field [0001] The invention relates to the field of crude oil online blending in oil refining enterprises, especially the situation that the nonlinear blending of crude oil falls into a local extreme value or the optimization has no solution. Background technique [0002] For constrained optimization problems in practical applications, the optimal solution is often located on or near the constraint boundary, or the feasible region occupies a small proportion of the entire search space (composed of feasible region and infeasible region). In this case, the location of the infeasible solution near the optimal solution is probably more valuable than the location of the feasible solution inside the feasible region. How to make full use of the infeasible solution to find the global optimal solution of the constrained optimization problem seems to be Very important. [0003] In the petroleum and petrochemical industry, crude oil online blending optimization technology has...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 叶彦斐胡云云陆琳娜羊康程伟国梅彬
Owner 南京富岛信息工程有限公司
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