Plant combination for producing steel and method for operating the plant combination

Patent metadata

Field	Value
Publication number	US-10697030-B2
Application number	US-201415102418-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 12, 2013
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel, a gas-conducting system for gases that occur in the production of pig iron and/or in the production of crude steel, and a power-generating plant for electricity generation. The power-generating plant is operated with a gas that comprises at least a partial amount of the blast-furnace top gas that occurs in the production of pig iron and/or a partial amount of the converter gas. According to the invention, a chemical or biotechnological plant is provided and connected to the gas-conducting system and arranged in parallel with the power-generating plant with respect to the gas supply. Externally obtained electricity and power-generating plant electricity are used to cover the electricity demand of the plant complex.

First claim

The invention claimed is:

1. A plant complex for the production of steel, comprising:
a blast furnace for producing pig iron;
a converter steel mill for producing crude steel;
a gas-conducting system for gases that occur in the production of pig iron and/or the production of crude steel;
a power-generating plant for electricity generation;
a hydrogen-producing plant; and
a chemical plant having a plurality of small units arranged in parallel that are individually switched on or off; and
a closed loop control system;
wherein:
the power-generating plant is designed as a gas-turbine power-generating plant or gas-turbine and steam-turbine power-generating plant;
the power-generating plant is operated with a gas that comprises at least a partial amount of blast-furnace top gas that occurs in the production of pig iron in the blast furnace and/or a partial amount of the converter gas that occurs in the converter steel mill;
the chemical or biotechnological plant is connected to the gas-conducting system and arranged in parallel with the power-generating plant with respect to the gas supply;
the hydrogen-producing plant is an electrolysis plant for the electrolysis of water and is connected to the gas-conducting system by a hydrogen-carrying line;
the gas-conducting system comprises an operationally adjustable gas diverter for dividing and controlling the streams of gas that are fed to the power-generating plant and the chemical or biotechnological plant;
the gas-conducting system further comprises, upstream of the gas diverter in the direction flow, a mixing device for producing a mixed gas comprising blast-furnace top gas and converter gas;
the gas diverter adjusts an amount of the mixed gas fed to the power generating plant and the chemical plant when a price for externally obtained electricity reaches a predetermined threshold;
the chemical plant comprises a plurality of small units arranged in parallel which can be individually switched on or off; and
the closed loop control system establishes an alternating operation of the power generating plant and the chemical plant.

2. The plant complex according to claim 1 , wherein the plant complex additionally comprises a coke-oven plant, and wherein the gas-conducting system includes a gas distribution for coke-oven gas that occurs in a coking process in the coke-oven plant.

3. A plant complex for the production of steel, comprising:
a blast furnace for producing pig iron;
a converter steel mill for producing crude steel;
a gas-conducting system for gases that occur in the production of pig iron and/or the production of crude steel;
a power-generating plant for electricity generation;
a biotechnological plant for a fermentation of a syngas; and
a closed loop control system;
wherein:
the power-generating plant is designed as a gas-turbine power-generating plant or gas-turbine and steam-turbine power-generating plant;
the power-generating plant is operated with a gas that comprises at least a partial amount of blast-furnace top gas that occurs in the production of pig iron in the blast furnace and/or a partial amount of the converter gas that occurs in the converter steel mill;
the biotechnological plant is connected to the gas-conducting system and arranged in parallel with the power-generating plant with respect to the gas supply;
the gas-conducting system comprises an operationally controllable gas diverter for dividing the streams of gas that are fed to the power-generating plant and the biotechnological plant;
the gas-conducting system further comprises, upstream of the gas diverter in the direction flow, a mixing device for producing a mixed gas comprising at least one of blast-furnace top gas, converter gas, and coke-oven gas; and
the closed loop control system establishes an alternating operation of the power generating plant and the biotechnological plant.

Assignees

• Thyssenkrupp Ag

Inventors

• Achatz Reinhold
• Wagner Jens
• Oles Markus
• Schmöle Peter
• Kleinschmidt Ralph
• Kolbe Bärbel
• Krüger Matthias Patrick
• Meissner Christoph

Classifications

• C25B1/04

  by electrolysis of water · CPC title

• F27B1/28

  Arrangements of monitoring devices, of indicators, of alarm devices · CPC title

• F27B1/025

  with fore-hearth · CPC title

• F05D2220/64

  for domestic central heating or production of electricity · CPC title

• F01K7/16

  the engines being only of turbine type (the engines using steam of critical or overcritical pressure F01K7/32; the engines being of extraction or non-condensing type F01K7/34) · CPC title