Wind-solar hydrogen production, wind-solar thermal storage and gas-based shaft furnace combined operation system

Abstract

The invention discloses a wind-solar hydrogen production, wind-solar heat storage and gas-based shaft furnace combined operation system. The system comprises a gas-based shaft furnace smelting unit; wherein a gas outlet of the electrolytic hydrogen production unit communicates with a gas inlet of the electric heating hydrogen storage heating unit, and a gas outlet of the solid heat storage boiler communicates with a hydrogen inlet of a shaft furnace of the gas-based shaft furnace smelting unit. According to the system, wind power and photovoltaic abandoned wind and abandoned light clean electric power is used for producing hydrogen, a high-voltage solid heat storage boiler is used for converting surplus wind power and photovoltaic electric power of a power grid into heat energy to be stored, the solid heat storage boiler is used for heating hydrogen, and high-temperature hydrogen is provided for a gas-based shaft furnace smelting unit. Therefore, direct reduction smelting of the pure hydrogen gas-based shaft furnace is achieved, carbon emission is reduced, and the problems that due to the strong heat absorption effect of hydrogen reduction, the gas entering amount of the full-hydrogen shaft furnace is too large, and the production efficiency is low are solved; thus, high-temperature hydrogen is provided for direct reduction smelting of the gas-based shaft furnace through wind and light hydrogen production and wind and light heat storage, and a full-chain clean smelting technical approach is achieved.

Description

Technical field: [0001] The invention relates to the technical field of smelting using clean energy, in particular to a combined operation system of wind-solar hydrogen production, wind-solar heat storage and gas-based shaft furnace. Background technique: [0002] With the continuous expansion of wind power and photovoltaic scale in the three north regions in recent years, affected by the characteristics of wind power output, photovoltaic output and power load characteristics, wind farms and photovoltaic power stations in most areas have the phenomenon of abandoning wind, abandoning light and limiting electricity. Lack of peak shaving means such as energy storage facilities has to limit the output of wind turbines and photovoltaic modules, which has a significant impact on the operating hours of wind power and photovoltaics. [0003] According to the different raw materials for producing hydrogen in my country, the production methods of hydrogen can be divided into non-renew...

AI Technical Summary

Problems solved by technology

[0002] With the continuous expansion of wind power and photovoltaic scale in the three north regions in recent years, affected by the characteristics of wind power output, photovoltaic output and power load characteristics, wind farms and photovoltaic power stations in most areas have the phenomenon of abandoning wind, abandoning light and limiting electricity. Lack of peak-shaving means such as energy storage facilities has to limit the output of wind turbines and photovoltaic modules, which has a significant impact on the operating hours of wind power and photovoltaics

[0003] According to the different raw materials for producing hydrogen in my country, the production methods of hydrogen can be divided into non-renewable hydrogen production and renewable hydrogen production. The raw material of the former is fossil fuel, and the raw material of the latter is water or renewable substances. The main problem is how to control carbon emissions and costs in the process of hydrogen production. The main development direction of future technology is to use renewable energy to electrolyze water and electrolyze sodium chloride solution, including wind power hydrogen production, photovoltaic hydrogen production and biological hydrogen production; however, The research and development of new energy hydrogen production technology in my country started relatively late, and the progress is relatively slow. At present, there is no mature commercial operation of new energy hydrogen production energy storage system

Images