Cracking furnace group scheduling modeling and method considering downstream disturbance constraints
A technology of cracking furnaces and furnace groups, which is applied in the field of scheduling modeling of cracking furnace groups, and can solve the problem that the results of the furnace group system are not necessarily optimal.
Pending Publication Date: 2020-11-13
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
The problem caused by this is that even if the ethylene yield of a certain cracking furnace is the largest, the final overall result is not necessarily optimal for the entire furnace group system.
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Embodiment 1
[0091] This embodiment provides a kind of cracking furnace group scheduling modeling and method under the constraints of downstream disturbances, for industrial production systems with multiple feeds and multiple products, such as ethylene cracking furnace systems, maintenance operations for restoring production performance The plan will frequently disrupt the downstream and even the entire process system. Therefore, through the optimal scheduling of the system, the profitability of the factory and the operability in terms of operation control can be well balanced. This example proposes a new MILP model to obtain a scheduling strategy for maximizing the profitability of the cracking furnace system considering the limitation of daily product yield. It enables simultaneous planning of sensible batch times and decoking sequences for each cracking furnace to handle optimal scheduling of multiple feeds, and control strategies to control daily product yields within specified limits ...
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The invention discloses a cracking furnace group scheduling modeling and method considering downstream disturbance constraints. The method comprises the following steps: obtaining sales income of various products, purchase cost of raw materials and decoking cost; acquiring a target function of a scheduling model, establishing constraint conditions, converting a MINLP problem into an MILP problem by using a piecewise linearization method, constructing an MILP model of cracking furnace group scheduling, and optimizing the MILP model by using CPLEX. The method is based on the limitation of dailyproduct yield; a scheduling strategy of the maximum cracking furnace system profitability is obtained, optimal arrangement of batch processing time and decoking sequence are planned for each crackingfurnace at the same time to process various feeding materials, and meanwhile, a control strategy for controlling daily product yield within a specified range is formed to avoid disturbance possibly occurring in a downstream process. In addition, trade-off analysis between product yield reduction and profit loss is carried out, and the profit capacity of a factory and the operability in the aspectof operation control are well balanced.
Description
technical field [0001] The invention relates to the technical field of ethylene cracking furnaces, in particular to a modeling and method for scheduling a cracking furnace group under the constraints of downstream disturbances. Background technique [0002] The petrochemical industry is the basic industry of my country's economic development and one of the most important industries in my country. The important cornerstone of the petrochemical industry is the ethylene industry. Because of the large-scale and wide-ranging uses of the ethylene industry, ethylene is usually used as a benchmark. To measure the development level of a country's entire petrochemical industry. my country has now become the second largest producer and consumer of ethylene in the world except the United States. According to forecasts, the global demand for ethylene and propylene will grow at an annual rate of 4% in the next five years. [0003] As the country has higher and higher requirements for ene...
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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/04
CPCG06Q10/04G06Q10/06312G06Q10/067G06Q50/04Y02P90/30C10G9/14C10G2400/20
Inventor 朱群雄王钰贺彦林王俊叶玮
Owner BEIJING UNIV OF CHEM TECH