High Efficiency of Hydrogen Plant By Water Electrolysis

1. Introduction

Hydrogen production by water electrolysis has the advantages of flexible application site, high product purity, large operation flexibility, simple equipment and high degree of automation, and is widely used in industrial, commercial and civil fields. In response to the country's low-carbon and green energy, hydrogen production by water electrolysis is widely deployed in places for green energy such as photovoltaic and wind power

2. Technical Features

•Sealing gasket adopts new polymer material to ensure the sealing performance of the electrolytic cell.
•The electrolyzer uses asbestos-free diaphragm cloth, which can reduce energy consumption, is green and environmentally friendly, has no carcinogens, and does not need to clean the filter.
• Perfect interlock alarm function.
•Adopt independent PLC control, with fault self-recovery function.
•Small footprint and compact equipment layout.
• Stable operation, uninterrupted throughout the year.
•Highly automated, enabling unmanned management on site.
• Under 30%-100% flow rate, the load can be adjusted freely, and the operation is safe and stable.
• The equipment has long service life and high reliability.

3. Brief Introduction of Process Flow

The raw water (pure water) in the raw water tank is injected into the hydrogen-oxygen scrubber through the water supply pump, and the lye in the gas is washed and then enters the hydrogen-oxygen separator. The electrolyzer produces hydrogen and oxygen under DC electrolysis. Hydrogen and oxygen are separated, washed and cooled by the hydrogen-oxygen separator, and the water separated by the water inlet separator is discharged through the drain pipe. Oxygen is output by the regulating valve through the oxygen outlet pipeline, and the user can choose to empty it or store it for use according to the usage situation. The production of hydrogen is regulated from the outlet of the gas-water separator through a regulating valve.

The make-up water for the water-sealed tank is the cooling water from the utilities. The rectifier cabinet is cooled by thyristors.
The whole set of hydrogen production system is controlled by PLC program to run fully automatically, stop automatically, detect and control automatically. It has control functions such as alarms and chains at all levels, and realizes the automation level of one-button start. With manual operation function. When the PLC fails, the system can be operated manually to ensure the continuous production of hydrogen by the system.

4. Technical parameters and equipment

Electrolyzer:

Purification:

Founded in 2000, Ally Hi-Tech is an engineering company dedicated to providing engineering service of industrial gas, especially hydrogen.

From design, construction to on-site guidance, after-sale maintenance, Ally has professional teams and provide our clients with customized service. Ally Hi-Tech has been focusing on the innovation of related technology and obtained 38 Chinese patents, 1 European patent, 1 American patent.

Owing to the advanced core tech, Ally participated in 6 national projects including Hydrogen projects of 2008 Olympics and 2020 Expo, while we also provide hydrogen for all the satellite launch centers in China.

Hydrogen production and hydrogen purification is the main business of Ally Hi-Tech.

We participated in the draft of the standards of hydrogen generation by methanol-reforming. As a member of the Chinese hydrogen standard committee, Ally Hi-Tech also took part in the editing of 6 Chinese standards and 1 international standard related to hydrogen.

By now, Ally Hi-Tech has delivered more than 500 units all over the world and built up cooperative relationships with a lot of clients, such as Air Liquide, Linde, Praxair, BP, Iwantani Group, etc.