Method for utilizing renewable energy electricity

A technology for renewable energy and water electrolysis, applied in electrolysis components, electrolysis process, climate sustainability, etc., can solve the problems of restricted development and high price

Active Publication Date: 2022-05-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the shortage of natural gas in China and the high price, it cannot be used in the Middle East, Iran, Russia, and the United States to produce sponge iron from natural gas, which limits the development of this technology

Method used

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  • Method for utilizing renewable energy electricity
  • Method for utilizing renewable energy electricity
  • Method for utilizing renewable energy electricity

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The following will be compared with the traditional coal-based blast furnace ironmaking process (such as figure 2 shown), the metallurgical process for consuming, converting and utilizing electric energy in this embodiment is described in detail. Among them, the traditional blast furnace ironmaking process is still the main method used in the world ironmaking technology due to its simple process, large production capacity and high efficiency. And research and develop new technology that meets the requirements of energy saving and emission reduction.

[0039] 1. Traditional coal-based blast furnace ironmaking process

[0040] (1) The mined iron ore is processed to generate iron oxide-rich products, which are made into pellets of 10 mm, and sent to the steel plant after drying, preheating, sintering, cooling, etc.

[0041] (2) Pellets, fuels (coke, pulverized coal, etc.) and other raw materials (limestone, dolomite, manganese ore, etc.) are loaded into the blast furnac...

Embodiment 2

[0059] This embodiment provides a system for large-scale consumption, conversion and utilization of electrical energy for metallurgy, the structure of which is as follows image 3 shown. The system includes a power grid 301, a control device 302, a water electrolysis device 303, a blast furnace 304, a gas-based shaft furnace 316 and chemical equipment 313; wherein:

[0060] The blast furnace 304 is provided with a blast furnace inlet 305, a slag outlet 306, a tap outlet 307, a blast furnace air inlet 308, and a blast furnace gas outlet 311, wherein the blast furnace inlet 305 is used to input iron ore, reducing agent and other materials ; The slag outlet 306 is used to output slag; the iron outlet 307 is used to output molten iron; the blast furnace gas outlet 311 is used to output the blast furnace gas with low nitrogen concentration;

[0061] The gas-based shaft furnace 316 is provided with a gas-based shaft furnace inlet 315, a gas-based shaft furnace inlet 317, and a gas-...

Embodiment 3

[0076] This embodiment provides a system for large-scale consumption, conversion and utilization of electrical energy for metallurgy, the structure of which is as follows Figure 4 shown. The difference between this system and the system of Example 2 is only that the water electrolysis device 303 of this system is provided with a carbon dioxide gas supply device 3031, and the anode of the water electrolysis device 303 is connected to the carbon dioxide gas supply device 3031;

[0077] During the water electrolysis process, carbon dioxide is injected into the anode of the water electrolysis device 303 through the carbon dioxide supply device 3031, wherein the volume ratio of the oxygen produced by the anode to the injected carbon dioxide is controlled to be 1:1, so that the partial pressure of the mixed gas of the cathode and the anode reaches Balance to ensure the safety of the device;

[0078] The mixture of oxygen and carbon dioxide produced by the anode enters the blast fu...

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Abstract

The invention relates to a method for utilizing renewable energy power. The method comprises the following steps: electrolyzing water by utilizing renewable energy electricity to produce hydrogen and oxygen; the hydrogen enters the gas-based shaft furnace as a reducing agent to produce sponge iron; oxygen is input into the blast furnace to replace air, and blast furnace gas with low nitrogen concentration is obtained; blast furnace gas is desulfurized and then mixed with hydrogen generated by electrolyzing water, and the mixture is input into a gas-based shaft furnace to produce sponge iron. The innovation of the invention lies in that a large amount of green electricity is consumed for hydrogen metallurgy by using electrolyzed water to produce hydrogen, a large amount of oxygen is generated at the same time, and the byproduct oxygen and carbon dioxide are creatively mixed to replace air for a blast furnace. And further introducing mixed gas formed by electrolyzed water oxygen and carbon dioxide into a blast furnace to react with carbon to generate blast furnace gas. The blast furnace gas is purified and then mixed with hydrogen produced by electrolyzing water to enter a gas-based shaft furnace for producing high-quality sponge iron.

Description

technical field [0001] The invention relates to a method for utilizing renewable energy electricity, and belongs to the technical field of electric energy utilization. Background technique [0002] The massive emission of carbon dioxide and environmental pollution lead to climate warming and smog, threatening human survival and public health. The effective solution is to decarbonize energy and reduce the consumption of fossil energy, especially the use of coal; at the same time, develop and utilize renewable energy, especially photovoltaics , wind power and hydropower and other green sources of electricity (abbreviation: green power). [0003] Electric energy is different from coal, oil, natural gas and other fossil energy sources that are easy to store, and must be produced, transmitted and utilized online at the same time. This feature determines that electricity as an energy source must consider the core characteristics of its time dimension, and coordinate power supply, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B9/65C25B15/02C21B13/02C21B5/00
CPCC25B1/04C25B15/02C21B13/02C21B13/0073C21B5/00C21B7/002C21B2100/42C21B2100/80Y02P10/134
Inventor 周红军罗聃孙晖徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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