Collaborative optimization method for hydrogen and gas in oil refining process

Abstract

An embodiment of the invention provides a collaborative optimization method for hydrogen and gas in an oil refining process. The method comprises the steps of respectively constructing mathematical optimizing models which correspond with a hydrogen consumption unit, a hydrogen making unit, a hydrogen purifying unit, a desulphurizing unit, a heating furnace unit, a light hydrogen recycling unit anda compressor unit in a hydrogen and gas system; performing individual solving on the mathematical optimizing model of each unit, and obtaining the operating parameter of each unit in the optimal working condition; constructing an optimization target function which corresponds with the hydrogen and gas system, and based on satisfaction of the optimization target function restraining conditions, calling a genetic algorithm for solving the gas flow which is used by each unit in the optimal working condition and comprises the hydrogen and gas. The method can help an enterprise for reducing wastehydrogen of a hydrogen system to a gas system, improving thermal efficiency of the heating furnace, further improving comprehensive utilization efficiency of hydrogen and gas resources, reducing natural gas amount and liquiefied gas amount of a gas supplementing pipeline network and reducing purchased hydrogen amount.

Description

technical field [0001] The invention belongs to the field of energy optimization, in particular to a synergistic optimization method for hydrogen and gas in the oil refining process. Background technique [0002] With the heavy and inferior quality of crude oil processed by refineries and the increasingly stringent environmental protection regulations, deep processing technologies such as hydrofining and hydrocracking have been widely used in refineries, and the hydrogen cost and energy consumption cost of refineries have been reduced. It has become the second and third largest cost after the purchase cost of crude oil. [0003] In oil refineries, the hydrogen system and the gas system are highly coupled, the tail gas from the purification and recovery unit of the hydrogen system will be discharged into the gas system, and the high-pressure gas from the gas system can be used as the raw material for hydrogen production in the hydrogen production unit of the hydrogen system. ...

AI Technical Summary

Problems solved by technology

However, all current literature studies only consider the optimization of one of the medium systems, and do not coordinate the two for global optimization.