Classifications

• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B5/00—Making pig-iron in the blast furnace
  • C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B13/00—Making spongy iron or liquid steel, by direct processes
  • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B7/00—Blast furnaces
  • C21B7/002—Evacuating and treating of exhaust gases
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
  • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
  • C21C5/28—Manufacture of steel in the converter
  • C21C5/38—Removal of waste gases or dust
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
  • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
  • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
  • C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B2200/00—Recycling of non-gaseous waste material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/20—Recycling
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/25—Process efficiency

Definitions

• the invention relates to a plant network for steel production and a method for operating the plant network.
• the plant grouping for steelmaking includes a blast furnace for the production of pig iron, a converter steelworks for the production of crude steel, a gas pipeline system for gases that are produced in the production of pig iron and / or crude steel, and a chemical plant and / or biotechnology plant connected to the gas pipeline system.
• chemical plant chemical products can be generated from the supplied gas flow rates, which each contain the components of the final product.
• biotechnology plant biochemical products can be generated from the supplied gas flow rates, which each contain the components of the final product.
• blast furnace iron ores, aggregates, coke and other reducing agents such as coal, oil, gas, biomass, recycled waste plastics or other carbon and / or hydrogen-containing materials are used to produce pig iron.
• the products of the reduction reactions inevitably arise CO, C0 2 , and in particular hydrogen and water vapor.
• a blast furnace top gas withdrawn from the blast furnace process which is also referred to as blast furnace gas and / or blast furnace gas, frequently has a high content of nitrogen in addition to the abovementioned constituents and may also contain impurities.
• the amount of gas and the composition of blast furnace top gas depend on the feedstock and the mode of operation and are subject to fluctuations.
• blast furnace top gas typically contains 35 to 60% by volume of N 2 , 20 to 30% by volume of CO, 20 to 30% by volume of CO 2 and 2 to 15% by volume of H 2 .
• Around 30 to 40% of the blast-furnace top gas produced during the production of pig iron is generally used to heat the hot blast for the blast furnace process in blast furnaces; The remaining top gas can be used for example in other areas of the plant also externally for heating purposes or for power generation.
• pig iron is converted to crude steel. Inflating oxygen to molten pig iron removes interfering contaminants such as carbon, silicon, sulfur and phosphorus.
• a converter gas is withdrawn, which has a high content of CO and also contains nitrogen, hydrogen and C0 2 .
• a typical converter gas composition has 50 to 70% by volume CO, 10 to 20% by volume N 2 , about 15% by volume C0 2 and about 2% by volume H 2 .
• the converter gas is either flared or collected in modern steelworks and fed to an energetic use.
• the plant network can optionally be operated in conjunction with a coking plant.
• the plant network described above additionally comprises a coke oven plant, in which coal is converted into coke by a coking process.
• the coking of coal to coke produces a coke oven gas which contains a high hydrogen content and considerable amounts of CH 4 .
• coke oven gas contains 55 to 70 vol.% H 2 , 20 to 30 vol.% CH 4 , 5 to 10 vol.% N 2, and 5 to 10 vol.% CO.
• the coke oven gas shares in C0 2 , NH 3 and H 2 S.
• coke oven gas is used, for example, in various plant areas for heating purposes and in the power plant process for generating electricity.
• coke oven gas together with blast furnace gas or with converter gas for the production of synthesis gas.
• coke oven gas is separated into a hydrogen-rich gas stream and a residual gas stream containing CH 4 and CO, the residual gas stream being fed to the blast furnace process and the hydrogen-rich gas stream being mixed with blast-furnace top gas and further processed to a synthesis gas.
• EP 0 200 880 A2 it is known to mix converter gas and coke oven gas and to use it as synthesis gas for a methanol synthesis.
• the object of the invention is to improve the stability, process control and sustainability of the overall process, in particular the ecological conditions of the overall process and, in particular, to specify a plant network for steelmaking with which it is possible to ensure continuous and sustainable operation of plants ,
• the subject of the invention is a plant for steel production with a blast furnace for pig iron production, a converter steelworks for crude steel production, a gas line system for gases produced in the production of pig iron and / or crude steel, connected to the gas line system chemical plant and / or biotechnology plant, the plant network additionally includes a connected to the gas line system biogas plant.
• Another object of the invention is a method for operating a plant network comprising a blast furnace for pig iron production, a converter steelworks for crude steel production, a biogas plant for biogas production, a gas line system for gases resulting from pig iron production and / or crude steel production and / or biogas production and a chemical plant and / or a biotechnology plant, wherein at least a partial amount of biogas produced in the biogas plant and a subset of the costs incurred in the production of pig iron blast furnace blast furnace gas and / or a subset of the costs incurred in crude steel production converter gas as the working gas for the operation of Chemical plant and / or the biotechnology plant and / or the blast furnace for pig iron production and / or converter steelworks for crude steel production is used.
• the present invention can be implemented in a plant network for steelmaking and in a method for operating a plant network.
• the devices of the plant network can be present in a simple and / or multiple design.
• the plant combination according to the invention for steel production has the advantages over conventional plant networks that by the connected to the gas line system fluctuations, in particular gas flows and / or gas compositions in the gas line system, in particular the gas supply can be compensated and the continuous operation of the system network can be stabilized.
• biogas in particular also referred to as biomethane, a biologically produced from biomass gas, which in particular comprises a composition of methane and carbon dioxide and which enables sustainable operation of the plant network and in particular improves the ecological conditions of the overall process.
• a biogas plant in the plant network according to the invention for example, the use of renewable energy from the power grid can be completely or partially reduced.
• biogas provided by a biogas plant on the use of natural gas can be completely or partially omitted, which is no further burden of so-called green house gas emissions.
• the method according to the invention for operating a plant network has the advantages that variations, in particular of gas flows and / or gas compositions, in the process can be better compensated for and a continuous operation of the method can be stabilized.
• the inventive method allows the use of biogas, in particular also referred to as biomethane, a biologically produced from biomass gas, which in particular comprises a composition of methane and carbon dioxide and allows sustainable operation of the system network and improves in particular the ecological conditions of the overall process.
• biogas in particular also referred to as biomethane
• biomass gas which in particular comprises a composition of methane and carbon dioxide
• the use of renewable energies from the power grid can be wholly or partly reduced.
• biogas on the Use of natural gas to be omitted in whole or in part, which is no further burden of so-called green house gas emissions.
• chemical products can be generated from the supplied gas flow rates, which each contain the components of the final product.
• Chemical products may be, for example, ammonia or methanol or higher alcohols or else other hydrocarbon compounds.
• the output, in particular the output of the chemical plant is regulated as a function of the gas quantities supplied to these plants.
• a major challenge for the chemical plant is the dynamic driving with changing plant loads, the system of the invention / the inventive method for operating the system network allows stabilization of the driving style.
• the mode of operation with changing plant loads can be realized, in particular, by the fact that the chemical plant has a plurality of small units connected in parallel, which are switched on or off individually depending on the available useful gas flow rate. For example, different chemical products can be produced in one or more units.
• a gas mixture which contains nitrogen and hydrogen in the correct ratio.
• the nitrogen can be obtained from blast furnace gas.
• other sources of hydrogen in particular water electrolysis come into consideration.
• hydrocarbon compounds for example methanol or higher alcohols
• a gas mixture consisting essentially of CO and / or CO 2 and H 2 must be provided, which contains the components carbon monoxide and / or carbon dioxide and hydrogen in the correct ratio.
• Blast furnace gas and / or converter gas and / or coke oven gas can be used as the hydrogen source, wherein additional hydrogen can be generated by conversion of the CO fraction through a water-gas shift reaction.
• additional hydrogen can be generated by conversion of the CO fraction through a water-gas shift reaction.
• other sources of hydrogen in particular water electrolysis come into consideration.
• converter gas can be used.
• blast furnace gas and / or converter gas can serve as C0 2 source.
• biotechnology plant biochemical products can be generated from the supplied gas flow rates, which each contain the components of the final product.
• Organic products may be, for example, alcohols (ethanol, butanol), acetone or organic acids.
• a biotechnology plant is a fermentation plant, possibly also a photobiological plant.
• a biogas plant is understood as meaning a plant which provides biogas from biomass.
• biogas is produced by microbial degradation of organic matter, especially biomass under anoxic conditions.
• Microorganisms convert the carbohydrates, proteins and fats contained in the biomass into the main products methane and carbon dioxide.
• biomass are waste as well as renewable raw materials of any kind.
• the biogas plant may additionally be preceded by a device for gas purification.
• a plant for the production of hydrogen is understood to mean a plant which provides hydrogen.
• a plant for hydrogen production may be a pyrolysis plant, a steam reforming plant, a partial oxidation plant, an autothermal reformer, a gasification plant, a water gas shift plant, or a combination thereof.
• the biogas of a biogas plant can be used for hydrogen production.
• the production of hydrogen can be carried out by electrolysis, preferably by electrolysis of water, wherein the electrolysis of water is expediently operated with electric power generated from renewable energy.
• a plant for biosynthesis gas production is understood in the present invention, a plant which produces a synthesis gas from biogas.
• a plant for biosynthesis gas production may be a steam reformer, a partial oxidation plant, an autothermal reformer, or a combination thereof.
• a biosynthesis gas has a composition comprising hydrogen and CO and / or CO 2.
• the plant network additionally comprises a coke oven plant connected to the gas line system.
• the plant network additionally comprises at least one plant connected to the gas line system for the production of hydrogen.
• the plant network additionally comprises a plant for biosynthesis gas production.
• the plant network additionally comprises a power plant for power generation, wherein the power plant is designed as a gas turbine power plant or gas turbine and steam turbine power plant and is operated with a gas which is a subset of the resulting in pig iron production in the blast furnace blast furnace gas and / or a subset the converter gas obtained in the converter steelworks and / or a subset of the biogas produced in the biogas plant and / or a subset of the resulting in the coke oven coke oven gas and / or a subset of the biosynthetic gas production in the plant biosynthesis gas and / or a subset of the plant hydrogen produced to produce hydrogen.
• the power plant is designed as a gas turbine power plant or gas turbine and steam turbine power plant and is operated with a gas which is a subset of the resulting in pig iron production in the blast furnace blast furnace gas and / or a subset the converter gas obtained in the converter steelworks and / or a subset of the biogas produced in the biogas plant and / or a subset
• the power generated in the power plant can be supplied to individual and / or multiple devices of the plant network.
• the distribution of the power generated can be done via power lines.
• the gas line system comprises at least one operationally controllable gas distribution device for dividing the chemical plant and / or the biotechnology plant and / or the plant for hydrogen production and / or the power plant and / or coke oven plant and / or blast furnace and / or Converter steel plant and / or the plant for biosynthesis gas generation supplied gas flow rates.
• an operationally controllable gas distribution device is an operationally controllable gas switch for the distribution of gas flow rates.
• the gas line system in the flow direction in front of the at least one controllable gas distribution device at least one mixing device for producing a blast furnace gas and / or converter gas and / or biogas and / or coke oven gas and / or hydrogen and / or oxygen and / or biosynthesis gas existing mixed gas and are by means of the operationally controllable gas distribution device that of the chemical plant and / or the biotechnology plant and / or the plant for hydrogen production and / or the power plant and / or the coke oven plant and / or the blast furnace and / or the converter steelworks and / or the plant Controlled for the production of biosynthetic gas gas flow rates.
• a mixing device in the context of the present invention is understood to mean a device which mixes gases and / or fluids with one another.
• a mixing device may be selected from a group of a venturi nozzle, a mixing vessel, a mixing station, a static mixer, an ejector, a pipe tee, or a combination thereof.
• the system network additionally has an energy store to cover at least part of the power requirement of the system network.
• the energy store can also be designed as a gas store, in particular with a device for converting stored gas into electricity.
• the plant network additionally has a plant for gas purification and / or gas conditioning.
• a plant for gas purification is understood to mean a plant which at least partially separates off those constituents of a gas which could have unfavorable effects, in particular on the efficiency, in downstream process steps.
• gas cleaning is understood as meaning a one-stage or multi-stage purification, in particular by mechanical sorting methods such as a separation selected from a group of density, particle size, particle inertness, surface wettability, magnetizability, electrical mobility, absorptive processes, catalytic processes or a combination thereof ,
• Gas conditioning in the context of the present invention is understood to be the setting of gas compositions and / or physical gas properties.
• the gas conditioning for example, a pressure swing adsorption for the separation and enrichment of H 2 and / or a water-gas shift reaction for converting CO and H 2 0 in H 2 and C0 2 and / or a steam reformer for conversion of CH 4 Share in CO and hydrogen, especially in coke oven gas.
• the setting of a preferred gas pressure can be done with a compressor.
• a temperature setting can be carried out, for example, in a thermal step.
• the plant network additionally comprises a coke oven plant connected to the gas line system, wherein at least a subset of the blast furnace top gas produced in the blast furnace in the blast furnace and / or a subset of the in the crude steel production accumulating converter gas and / or a subset of biogas produced in the biogas plant and / or a subset of the resulting in the coke in the coke oven coke oven gas as a useful gas for operating the chemical plant and / or the biotechnology plant and / or the blast furnace for hot metal production and / or the converter steelworks for crude steel production and / or the coke oven plant is used.
• the plant network additionally comprises a system for producing hydrogen connected to the gas line system, wherein at least a subset of the blast furnace gas produced in the blast furnace in the blast furnace and / or a subset of the converter gas resulting from the crude steel production and / or a subset of the biogas produced at the biogas plant and / or a subset of the resulting coke in the coke oven coke oven gas and / or a subset of the resulting hydrogen in the plant hydrogen production as a useful gas for operating the chemical plant and / or the biotechnology plant and / or Blast furnace for pig iron production and / or the converter steelworks for crude steel production and / or coke oven plant and / or the plant is used for hydrogen production.
• the plant network additionally comprises a system for biosynthesis gas production connected to the gas line system, wherein at least a subset of the blast furnace gas produced in the blast furnace in the blast furnace and / or a subset of the converter gas resulting from the crude steel production and / or a subset of the biogas produced at the biogas plant and / or a subset of the resulting coke in the coke oven coke oven gas and / or a subset of the resulting hydrogen in the plant hydrogen production and / or a subset of the resulting biosynthesis gas biosynthesis plant as a useful gas for the operation of the chemical plant and / or the biotechnology plant and / or the blast furnace for the production of pig iron and / or the converter steelworks for crude steel production and / or the coke oven plant and / or the plant r hydrogen production and / or the plant is used for biosynthesis gas production.
• the plant network additionally comprises a power plant connected to the gas line system, wherein at least a subset of the blast furnace gas produced in the blast furnace in the blast furnace and / or a subset of the converter gas and / or a subset of crude steel production of biogas produced at the biogas plant and / or a subset of the coke in the Koksofengases resulting coke oven plant and / or a subset of the resulting in the plant for hydrogen production hydrogen and / or a subset of the biosynthesis gas generation plant biosynthesis gas as a useful gas for operating the chemical plant and / or the biotechnology plant and / or blast furnace for pig iron production and / or the converter steelworks for crude steel production and / or the coke oven plant and / or the plant for hydrogen production and / or the plant for biosynthesis gas production and / or the power plant is used.
• the plant network additionally comprises a system for gas purification and / or gas conditioning connected to the gas line system, wherein at least a subset of the blast furnace top gas produced during the production of pig iron in the blast furnace and / or a subset of that resulting from crude steel production Converter gas and / or a partial amount of biogas produced in the biogas plant and / or a subset of the coke in the coke oven coke oven gas and / or a subset of the resulting hydrogen in the plant hydrogen production and / or a subset of the plant for biosynthesis gas production purified biosynthesis gas is purified and / or conditioned.
• a system for gas purification and / or gas conditioning connected to the gas line system, wherein at least a subset of the blast furnace top gas produced during the production of pig iron in the blast furnace and / or a subset of that resulting from crude steel production Converter gas and / or a partial amount of biogas produced in the biogas plant and / or a subset of the coke in the co
• Fig. 1 is a highly simplified block diagram of a plant network according to the invention for steel production.
• a biogas plant 6 and a chemical plant 4 and / or a biotechnology plant 5 is connected.
• a coke oven plant 7 and / or a plant for hydrogen production 8 and / or a plant for biosynthesis gas production 9 are connected to the gas line system 3.
• the plant network additionally has a power plant 10, which is designed as a gas turbine power plant or gas turbine and steam turbine power plant.
• the electrical power generated by the power plant 10 may be via a dotted line represented power line network 16 are distributed to individual and / or multiple devices of the system network.
• the gas line system 3 comprises an operationally controllable gas distribution device 11 for dividing the chemical plant 4 and / or the biotechnology plant 5 and / or the plant for hydrogen production 8 and / or the power plant 10 and / or the coke oven plant 7 and / or the plant for biosynthetic gas production 9 supplied gas flow rates.
• At least one mixing device 12 for producing a blast furnace gas and / or converter gas and / or biogas and / or coke oven gas and / or hydrogen and / or oxygen and / or biosynthesis gas existing mixed gas is arranged and by means of Operationally controllable gas distribution device 11 of the chemical plant 4 and / or the biotechnology plant 5 and / or the plant for hydrogen production 8 and / or the power plant 10 and / or the coke oven plant 7 and / or the plant for biosynthesis gas generation 9 supplied gas flow rates are controllable.
• the system network additionally has an energy store 13 to cover at least part of the power requirement of the system network.
• a plant for gas conditioning 15 and / or gas cleaning 14 is arranged in the plant network.
• the optional devices of the system network are shown in dashed lines.
• Plant composite for steelmaking and a method for operating a plant network of the type described above can be used in the production of steel.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Environmental & Geological Engineering (AREA)
• Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
• Manufacture Of Iron (AREA)
• Carbon Steel Or Casting Steel Manufacturing (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2018
  • 2018-06-07 DE DE102018209042.4A patent/DE102018209042A1/de active Pending
• 2019
  • 2019-06-03 KR KR1020207037612A patent/KR20210015926A/ko not_active Application Discontinuation
  • 2019-06-03 EP EP19728055.5A patent/EP3802889A1/de active Pending
  • 2019-06-03 CN CN201980038150.2A patent/CN112313347A/zh active Pending
  • 2019-06-03 WO PCT/EP2019/064310 patent/WO2019233934A1/de unknown
  • 2019-06-03 US US15/734,745 patent/US20210238700A1/en not_active Abandoned

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