Electrolyte flow and pressure control method and system for dynamic hydrogen production electrolytic bath

A technology of pressure control and electrolysis current, applied in the direction of electrolysis process, electrolysis components, energy input, etc., can solve the problems of accelerating equipment and material loss, increasing operating costs, gas accumulation, etc.

A technology of pressure control and electrolysis current, applied in the direction of electrolysis process, electrolysis components, energy input, etc., can solve the problems of accelerating equipment and material loss, increasing operating costs, gas accumulation, etc.

CN113373477AActive Publication Date: 2021-09-10HUANENG CLEAN ENERGY RES INST +9
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  • Electrolyte flow and pressure control method and system for dynamic hydrogen production electrolytic bath
  • Electrolyte flow and pressure control method and system for dynamic hydrogen production electrolytic bath
  • Electrolyte flow and pressure control method and system for dynamic hydrogen production electrolytic bath

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Effect test

Embodiment 1

[0034] see figure 1 As shown, the electrolyte flow rate and pressure control method of a dynamic hydrogen production electrolyzer of the present invention comprises the following steps:

[0035] S1. Obtain the input power of the external power supply of the electrolyzer;

[0036] S2. Compare the input power of the external power supply with the set power of the electrolytic cell; when the input power of the external power supply is greater than the set power of the electrolytic cell, the electrolytic current increases, the pressure of the electrolytic cell is increased, and the flow rate of the electrolyte is increased; when the external power input When the power is less than the set power of the electrolytic cell, the electrolytic current decreases, the pressure of the electrolytic cell is reduced, and the flow of the electrolyte is reduced;

[0037] The set power is the rated power of the electrolytic cell; the electrolytic current is X% of the rated current of the electro...

Embodiment 2

[0044] On the basis of embodiment 1, this embodiment also includes the following steps:

[0045] Monitor the content of hydrogen in the oxygen prepared by the electrolyzer; when the volume of hydrogen in the oxygen is greater than or equal to 1.5%, reduce the pressure of the electrolyzer and reduce the flow rate of the electrolyte until the content of hydrogen in the oxygen prepared by the electrolyzer is less than 1.5%.

[0046] Pressure and electrolyte flow control are also affected by the purity of the oxygen produced by the electrolyzer: as the oxygen purity decreases, the pressure decreases and the electrolyte flow decreases to reduce gas permeation through the membrane and blending through the electrolyte.

Embodiment 3

[0048] see figure 2 As shown, the electrolyte flow rate and pressure control method of a dynamic hydrogen production electrolyzer of the present invention comprises the following steps:

[0049] S1. Periodic sampling to obtain the input power of the external power supply of the electrolyzer;

[0050] S2. Compare the input power of the external power supply with the set power of the electrolytic cell; when the input power of the external power supply is greater than the set power of the electrolytic cell, the electrolytic current increases, the pressure of the electrolytic cell is increased, and the flow rate of the electrolyte is increased; when the external power input When the power is less than the set power of the electrolytic cell, the electrolytic current decreases, the pressure of the electrolytic cell is reduced, and the flow of the electrolyte is reduced;

[0051] The set power is the rated power of the electrolytic cell; the electrolytic current is X% of the rated ...

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Abstract

The invention belongs to the field of renewable energy sources and hydrogen energy, and discloses an electrolyte flow and pressure control method and system for a dynamic hydrogen production electrolytic bath. The method comprises the following steps: S1, obtaining the external power supply input power of the electrolytic bath; and S2, comparing the input power of the external power supply with the preset power of the electrolytic bath; when the input power of the external power supply is greater than the preset power of the electrolytic bath, rising the electrolytic current, increasing the pressure of the electrolytic bath and increasing the electrolyte flow; and when the external power input power is smaller than the preset power of the electrolytic cell, reducing the electrolytic current, reducing the electrolytic bath pressure, and reducing the electrolyte flow. According to the invention, safe, stable and efficient operation of the electrolytic bath in the dynamic hydrogen production process is realized through automatic adjustment of the pressure and flow of the electrolyte, and absorption of renewable energy sources is realized through hydrogen production by using electrolyzed water.

Description

technical field [0001] The invention belongs to the field of renewable energy and hydrogen energy, and in particular relates to a method and system for controlling electrolyte flow and pressure of a dynamic hydrogen production electrolyzer. Background technique [0002] At present, renewable energy power generation accounts for an increasing proportion in the world, and its inherent volatility requires that renewable energy power generation must be equipped with a certain-capacity energy storage system to meet the needs of stable and safe energy output. Hydrogen production by electrolysis of water is currently the only technology capable of large-scale, long-term renewable energy storage. However, traditional water electrolysis hydrogen production technology and equipment are designed for stable power input, and they lack the matching of fluctuating power input, that is, the dynamic hydrogen production process. [0003] Under the input of fluctuating power supply, the worki...

Claims

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Application Information

Patent Timeline
10 Sep 2021
Publication
CN113373477A
IPC
C25B15/023; C25B15/02; C25B15/08; C25B1/04
CPC
C25B15/023; C25B15/08; C25B15/02; C25B1/04; Y02P20/133; Y02E60/36
Inventors
张畅; 王金意