New method for determining process execution sequence in hydrogen network node hydrogen

Abstract

The invention belongs to the technical field of the hydrogen network, and discloses a new method for determining a process execution sequence in hydrogen network node hydrogen. The new method comprises the following steps that: firstly, applying a source logistics distribution method to enable current source logistics to independently meet each process which is not executed, and determining a process execution sequence according to a principle that a process with a maximum external source logistics use amount or purified source logistics use amount in sequence; combining the determined process execution sequence with an iteration method for designing a fixed purified hydrogen concentration model and a given impurity removal rate model hydrogen network to independently design the multiple-impurity hydrogen network of two types of models. By use of the design method disclosed by the invention, the external source logistics use amount is minimized. For a previous model, the external source logistics use amount, the purified source logistics use amount and a fuel gas discharge value are independently reduced by 1.60%, 3.71% and 2.00%. For a last model, under a situation that the purified source logistics impurity concentration is low, the external source logistics use amount, the purified source logistics use amount and a fuel gas discharge value are independently reduced by 4.05%, 0.43% and 4.94%.

Description

Technical field [0001] The invention belongs to the technical field of hydrogen networks, and in particular relates to a new method for determining the execution sequence of processes in the hydrogen saving of hydrogen networks. Background technique [0002] Hydrogen has now become a very important resource. A large amount of hydrogen is used in the hydrogenation process of petroleum refining and chemical enterprises. With the heavyization and deterioration of crude oil and the implementation of increasingly stringent industrial environmental protection standards and related legislation, the demand for hydrogen in the hydrogenation process continues to increase . When there are multiple devices such as hydrogen consuming, hydrogen production, and hydrogen purification units, and there are close connections between these devices, these devices are often regarded as hydrogen networks. [0003] Compared with hydrogen networks that only consider recycling, scholars from various count...

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Problems solved by technology

However, this qualitative conclusion cannot give a hydrogen consumption target; Liu et al. proposed a hydrogen network purification unit model to evaluate the feasibility of the purification scheme; Agrawal et al. proposed a diagram that does not require iteration based on the concept of the limit composite curve method, by constructing a limiting hydrogen distribution diagram to discuss the hydrogen network with purification units, and give a method to calculate the target value of hydrogen consumption; Foo et al. proposed a method called gas cascade analysis (GCA) to calculate the available Hydrogen target, and discussed the situation with two purification units; Ng et al. proposed an automation-based target pinch technology for the design of reuse hydrogen network, and Ng et al. improved it to study the purification problem of hydrogen stream ; Zhang et al. proposed a graphical method to obtain the pinch concentration and hydrogen consumption target of the hydrogen network of the purification unit through the impurity load-flow rate composite curve

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