China's steel production capacity of more than 1 billion tons/year, steel production process by-product a large number of blast furnace gas, converter gas and coke oven gas, by-product gas contains carbon monoxide, hydrogen and methane gas. Carbon-one chemical industry is a production process in which a carbon atom compound (carbon monoxide, methane, etc.) is used as raw material to convert and synthesize chemical products, especially the modern coal chemical industry with synthesis gas (carbon monoxide and hydrogen) as the basic raw material is the most typical. The purification of carbon monoxide and hydrogen from steel by-product gas is directly used in carbon-one chemical industry, which not only improves the utilization value of steel gas, but also reduces the production cost of chemical synthesis. The steel co-production takes the by-product gas of the steel industry as the source, and the chemical products of the chemical industry, such as methanol, ethanol, ethylene glycol, etc. as the terminal, breaking through the limitations of the industry, comprehensive overall consideration, and building a bridge between steel and chemical industry is one of the effective ways for the steel industry to achieve the "double carbon goal.
Technical features
Nitrogen-enriched purification of carbon monoxide
The separation of nitrogen and carbon monoxide is a worldwide problem, the use of unique PU-1 adsorbent and supporting separation and purification process, to achieve a technological breakthrough in the purification of carbon monoxide under nitrogen-rich atmosphere, for the development of tempering co-production projects to provide key technical support.
Purification of high/converter gas
Take the lead in the industry to put forward the high/converter gas purification purification process route, "compression-desulfurization-deoxygenation-dehydration-carbon capture-carbon monoxide purification", and successfully achieve industrialization, low energy consumption, advanced process, and further improve the economy of tempering co-production.
Let carbon capture hitch a ride
The carbon dioxide content in high/converter gas is 20-30%, decarbonization (carbon capture) is the necessary process to extract high purity carbon monoxide from high/converter gas, and the tempered co-production mode reduces the cost and energy consumption of carbon capture in the steel industry.
Obvious economic benefit
Compared with modern coal chemical industry, steel gas is replaced by coal gas, which reduces the raw material cost of chemical production, avoids the risk of coal price fluctuation, and makes the price of end chemical products more competitive.
Outstanding environmental benefits
Tempering co-production will be originally used for combustion of carbon monoxide solid load into chemical products, while gas dust removal, desulfurization and other purification treatment, reduce iron and steel enterprises carbon emissions, sulfur emissions and nitrogen oxides and other pollutants emissions, to achieve ultra-low emissions and double carbon targets.
Significant social benefits
Toughened co-production is an overall solution to jump out of the restrictions of a single industry, extend the industrial chain of the steel industry, enhance the ability to resist risks, expand the raw material channels of the chemical industry, enhance product competitiveness, and promote the transformation and upgrading of industry integration.
Application areas
Foundry blast furnace ironmaking enterprise
Casting ironmaking generally uses a casting blast furnace below 1000 cubic meters. Blast furnace gas is produced by-product in the process of producing molten iron. Carbon monoxide can be purified from blast furnace gas for the production of formic acid, acetic acid, dimethyl carbonate and other chemical products that do not require hydrogen to participate in the synthesis.
Blast furnace converter long process steelmaking enterprises
According to different production capacity, long-process steelmaking enterprises use 1000-6000 cubic meters of blast furnace for ironmaking and 30-350 tons of converter for steelmaking. At the same time, by-products of blast furnace gas and converter gas can purify carbon monoxide from blast furnace gas and converter gas for the production of formic acid, acetic acid, dimethyl carbonate and other chemical products that do not require hydrogen to participate in synthesis.
Iron and Steel Coking Joint Enterprise of Blast Furnace Converter Coke Oven
On the basis of long-process steelmaking, the iron and steel coking joint enterprise is equipped with a 4.3 m-7.6m coke oven to produce coke for blast furnace ironmaking. At the same time, coke oven gas is produced by-product, which can purify hydrogen from coke oven gas and carbon monoxide from blast furnace gas and converter gas, and is used to produce methanol, ethanol, ethylene glycol and other chemical products that require hydrogen to participate in synthesis.
Independent coking enterprise
According to different production capacity, independent coking enterprises use 4.3 m-7.6m coke oven to produce coke and by-product coke oven gas. Methane in coke oven gas can be reformed first to become synthesis gas of carbon monoxide and hydrogen, and then carbon monoxide and hydrogen in synthesis gas can be separated and purified to produce methanol, ethanol, ethylene glycol and other chemical products that require hydrogen to participate in synthesis.
