Start-stop and load scheduling method of air separation pipe network device for uncertain demand

Abstract

The invention discloses an uncertain demand-oriented start-stop and load scheduling method for an air separation pipe network device. According to the operating status of the devices in the air separation pipeline network, it is divided into different modes, and the piecewise linear proxy model of the product output of each production device in each mode is established, and the process balance and boundary conditions of other devices in the pipeline network are analyzed. etc., and established a scheduling optimization model for the entire pipeline network from the three levels of oxygen, nitrogen, and argon; on this basis, in view of the uncertainty of market demand, a two-stage stochastic optimization model was adopted, and a conditional value-at-risk model was introduced to maximize The two-stage profit and conditional value-at-risk of the air separation pipeline network are taken as the goal, and the production scheduling plan is formulated. The present invention can carry out risk measurement when the market demand is uncertain, and formulate different scheduling schemes according to different risk levels, thereby effectively avoiding low-yield and high-risk situations; at the same time, the piecewise linear proxy model can reduce the solution time and facilitate large-scale The solution calculation of the model.

Description

Technical field [0001] The present invention relates to the field of scheduling optimization of the air separation network, and in particular to a space-to-duct mesh device for uncertain demand, the lap and load scheduling method. Background technique [0002] Air separation refers to the different gas-liquid phase products such as high purity oxygen, nitrogen and argon by using the physical properties of each component in the air. Common air separation methods have low temperature separation methods, adsorption methods and membrane separation methods. When the oxygen demand is low, the adsorption method is usually selected when the gas phase product is required. When the purity is high, it is usually used to produce a gas-liquid phase product, and a low temperature separation method is usually selected. Since steel companies are large, low temperature separation methods are usually used. The low temperature separation method is carried out by air, and the air is compressed, and ...

AI Technical Summary

Problems solved by technology

In addition, the start-stop of the device and the increase in the frequency of load adjustment are also factors that increase the energy consumption of air separation

Due to real-time changes in demand, the difficulty of scheduling problems has also greatly increased, and manual scheduling has disadvantages such as strong subjectivity and poor reliability, so it is extremely important to optimize the scheduling of the air separation pipeline network

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