Hydrogen gas gradient allocation pipe network structure, middle grade and its determination method

Abstract

The invention discloses a hydrogen gas step distributing pipe net structure, the intermediate grade and the determining method. Wherein a hydrogen supplying device and a hydrogen utilizing device are only respectively connected with an intermediate pressure grade and a hydrogen gas purification intermediate grade, thus to form a network system of hydrogen gas step distribution. Wherein the intermediate grade comprises an intermediate pressure grade and a hydrogen gas purification intermediate grade, the intermediate pressure grades are set according to the pressure requirement of the hydrogenutilizing device, and the intermediate purification grade is set according to the hydrogen purification required by the hydrogen utilizing device in each intermediate pressure grade. The network system has the advantages that in the structure, the hydrogen supplying device and the hydrogen utilizing device are not directly connected, thereby not only the structure of the hydrogen distributed by the network is simplified, the prolongation of the hydrogen distribution network is improved, but also the control of hydrogen supplied by hydrogen distribution network is relatively easy, thus to ensure that the hydrogen step distribution and the network transmitting can be operated under a more economic mode.

Description

technical field [0001] The invention belongs to process system integration technology, and in particular relates to a hydrogen cascade distribution pipeline network structure, an intermediate level and a determination method thereof. Background technique [0002] At present, the pipeline network structure of hydrogen in refining and chemical enterprises is to directly connect each hydrogen production device and hydrogen consumption device with pipelines, or to set up high-purity hydrogen transmission supervisors (for example, pure hydrogen main pipes in refining and chemical enterprises) and low-purity hydrogen Auxiliary pipes (for example, hydrogen-containing fuel gas auxiliary pipes installed in refining and chemical enterprises) connect hydrogen production and hydrogen consumption devices, and also contain a pipeline network structure directly connected to hydrogen production and hydrogen consumption devices. [0003] The first type of hydrogen delivery pipeline network s...

AI Technical Summary

Problems solved by technology

[0003] The first type of hydrogen delivery pipeline network structure will lead to a close connection between hydrogen production units and hydrogen use devices. For systems with more hydrogen production and hydrogen use devices, the pipeline network structure is more complex, the structure is not easy to expand and the network is flexible poor

When parameters such as the flow rate, pressure and hydrogen purity of the upstream hydrogen production device fluctuate, it may cause fluctuations in the working conditions of the downstream hydrogen consumption device, which will seriously cause the device to fail to work normally; when the downstream needs to increase or decrease the hydrogen consumption device, it needs to be adjusted Or when expanding the pipeline network structure, local adjustments may affect the overall hydrogen transmission pipeline network structure

In addition, in order to meet the pressure transmission requirements of hydrogen devices, it is often necessary to install more compressors locally in the pipeline network system, which increases the investment and operating costs of the system, and is not conducive to the operation control of hydrogen transmission

[0004] In addition to the disadvantages of the first hydrogen delivery pipeline network structure, the second hydrogen delivery pipeline network structure is usually based on the high-purity hydrogen and low-purity hydrogen discharged from the hydrogen production device for the pressure and purity of the hydrogen main and auxiliary pipelines. Or the experience of the designer is artificially set, instead of determining the number of pressure levels and the number of hydrogen purity levels based on the actual needs of the hydrogen device for hydrogen pressure and hydrogen purity. The setting also lacks a quantitative optimization design method to optimize the energy consumption or total cost of the hydrogen distribution network system

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