1, Jin Tongling: The 2020 annual report shows that the company's operating income is 65.438+43.6 million yuan, up -23.63% year-on-year, with a compound growth of -654.38+04.08% in recent three years. Invest in the construction and operation of a biomass hydrogen production project with an annual output of 20 million cubic meters.
2. Hongda Xingye: In 2020, the company achieved a total revenue of 5.394 billion yuan, a year-on-year increase of 65,438+0.78%. The company said that this cooperation is in line with the national policy orientation on developing new energy, which will lay a solid foundation for the company to enter the field of hydrogen energy, help the company to speed up the layout of the complete industrial chain of hydrogen production, hydrogen storage, hydrogen transportation and hydrogen energy application, and further improve the company's core competitiveness.
3. Yuneng Holdings: In 2020, the operating income was 868 1 billion, a year-on-year increase of 7.23%. The company has a hydrogen production station, which uses hydrolysis to produce hydrogen, which is mainly used as the cooling medium of generator rotor.
4. Xintian Green Energy: In 2020, the company achieved a total revenue of 65,438+0,256,5438+0 billion, a year-on-year increase of 4.38%. It is the third largest oil distributor in North China and one of the leading natural gas distributors in Hebei Province. At present, a demonstration project of hydrogen production by wind power has been basically completed in Zhangjiakou, and related technical reserves for hydrogen production and hydrogen energy utilization are being actively explored.
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Hydrogen production by electrolysis of water is a simple method. Direct current is introduced into the electrolytic cell containing electrolyte, and water molecules undergo electrochemical reaction on the electrode, which is decomposed into hydrogen and oxygen. When direct current is applied to some electrolyte aqueous solutions, the decomposed substances have nothing to do with the original electrolyte. What is decomposed is water as a solvent, and the original electrolyte remains in the water. For example, sulfuric acid, sodium hydroxide and potassium hydroxide all belong to this electrolyte. When electrolyzing water, pure water is a typical weak electrolyte because of its low ionization degree and low conductivity. It is necessary to add the above electrolyte to increase the conductivity of the solution, so that water can be electrolyzed smoothly into hydrogen and oxygen.
2. Solid polymer electrolyte, SPE electrolyzes water, which was originally used to supply oxygen to spacecraft or submarines, or as a hydrogen generator in the laboratory (which can be used for gas chromatography). After the large-scale development of nuclear power, people use SPE technology to electrolyze water to produce hydrogen at low power consumption trough, and use SPE hydrogen-oxygen fuel cell to supply power to the outside at power supply peak, making it an energy storage conversion device. High-purity hydrogen is produced by direct electrolysis of pure water (without alkali), and hydrogen can be produced by electrolysis of pure water in electrolytic cell. After electrifying, the cathode of electrolytic cell produces hydrogen, the anode produces oxygen, and the hydrogen enters the hydrogen/water separator. Oxygen is discharged into the atmosphere. A hydrogen/water separator separates hydrogen from water. After the hydrogen enters the dryer for dehumidification, it is adjusted to the rated pressure (0.02 ~ 0.45 MPa ~ 0.45 MPa adjustable) through the pressure stabilizing valve and regulating valve, and then it is output from the outlet. The hydrogen production pressure of the electrolyzer is controlled by the sensor at about 0.45Mpa. When the pressure reaches the set value, the power supply of the electrolyzer is cut off. When the pressure drops below the set value, the power supply will be restored.