PLANT COMPLEX FOR PRODUCING STEEL AND A METHOD FOR OPERATING THE PLANT COMPLEX

Abstract

A plant complex for producing steel, having a blast furnace for producing pig iron; a converter steel works for producing crude steel; a gas pipeline system for gases that occur in the production of pig iron and/or the production of crude steel; a chemical plant and/or a biotechnology plant which are/is connected to the gas pipeline system, wherein the plant complex additionally includes a biogas plant which is connected to the gas pipeline system.

Claims

1.-15. (canceled)

16. A plant complex for producing steel, comprising a blast furnace for producing pig iron; a converter steel works for producing crude steel; a gas pipeline system for gases that occur in the production of pig iron and/or the production of crude steel; a chemical plant and/or a biotechnology plant which are/is connected to the gas pipeline system, and a biogas plant which is connected to the gas pipeline system.

17. The plant complex of claim 16 wherein the plant complex further comprises a coke oven plant which is connected to the gas pipeline system.

18. The plant complex of claim 16 wherein the plant complex further comprises at least one hydrogen generation plant which is connected to the gas pipeline system.

19. The plant complex of claim 16 wherein the plant complex further comprises a biosynthesis gas generation plant.

20. The plant complex of claim 16 wherein the plant complex further comprises a power generation plant for electricity, wherein the power generation plant is a gas-turbine power generation plant or a gas-turbine and steam-turbine power generation plant and is operated with a gas that comprises a partial amount of the 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 works and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the coke oven plant and/or a partial amount of the biosynthesis gas that occurs in the biosynthesis gas generation plant and/or a partial amount of the hydrogen that occurs in the hydrogen generation plant.

21. The plant complex of claim 16 wherein the gas pipeline system comprises at least one operatively controllable gas diverter for dividing the streams of gas that are fed to the chemical plant and/or the biotechnology plant and/or the hydrogen generation plant and/or the power generation plant and/or the coke oven plant and/or the blast furnace and/or the converter steel works and/or the biosynthesis gas generation plant.

22. The plant complex of claim 16 wherein the gas pipeline system in the flow direction upstream of the at least one operatively controllable gas diverter has at least one mixing device for producing a mixed gas composed of blast-furnace top gas and/or converter gas and/or biogas and/or coke oven gas and/or hydrogen and/or oxygen and/or biosynthesis gas, and in that streams of gas that are fed to the chemical plant and/or the biotechnology plant and/or the hydrogen generation plant and/or the power generation plant and/or the coke oven plant and/or the blast furnace and/or the converter steel works and/or the biosynthesis gas generation plant are able to be controlled by means of the operatively controllable gas diverter.

23. The plant complex of claim 16 wherein the plant complex further comprises an energy accumulator for providing at least part of the electricity requirement of the plant complex.

24. The plant complex of claim 16 wherein the plant complex further comprises a gas purification and/or gas conditioning plant.

25. A method for operating a plant complex including a blast furnace for producing pig iron, a converter steel works for producing crude steel, a biogas plant for producing biogas, a gas pipeline system for gases that occur in the production of pig iron and/or the production of crude steel and/or the production of biogas, and a chemical plant and/or a biotechnology plant, the method comprising: using at least a partial amount of the biogas that occurs in the biogas plant and a partial amount of the 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 production of crude steel are/is for operating the chemical plant and/or the biotechnology plant and/or the blast furnace for the production of pig iron and/or the converter steel works for the production of crude steel.

26. The method for operating a plant complex of claim 25 wherein the plant complex further comprises a coke oven plant which is connected to the gas pipeline system, wherein at least a partial amount of the 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 production of crude steel and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the production of coke in the coke oven plant are/is used as useful gas for operating the chemical plant and/or the biotechnology plant and/or the blast furnace for the production of pig iron and/or the converter steel works for the production of crude steel and/or the coke oven plant.

27. The method for operating a plant complex of claim 25 wherein the plant complex further comprises a hydrogen generation plant which is connected to the gas pipeline system, wherein at least a partial amount of the 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 production of crude steel and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the production of coke in the coke oven plant and/or a partial amount of the hydrogen that occurs in the hydrogen generation plant are/is used as useful gas for operating the chemical plant and/or the biotechnology plant and/or the blast furnace for the production of pig iron and/or the converter steel works for the production of crude steel and/or the coke oven plant and/or the hydrogen generation plant.

28. The method for operating a plant complex of claim 25 wherein the plant complex further additionally comprises a biosynthesis gas generation plant which is connected to the gas pipeline system, wherein at least a partial amount of the 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 production of crude steel and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the production of coke in the coke oven plant and/or a partial amount of the hydrogen that occurs in the hydrogen generation plant and/or a partial amount of the biosynthesis gas that occurs in the biosynthesis gas generation plant are/is used as useful gas for operating the chemical plant and/or the biotechnology plant and/or the blast furnace for the production of pig iron and/or the converter steel works for the production of crude steel and/or the coke oven plant and/or the hydrogen generation plant and/or the biosynthesis gas generation plant.

29. The method for operating a plant complex of claim 25 wherein the plant complex further comprises a power generation plant which is connected to the gas pipeline system, wherein at least a partial amount of the 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 production of crude steel and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the production of coke in the coke oven plant and/or a partial amount of the hydrogen that occurs in the hydrogen generation plant and/or a partial amount of the biosynthesis gas that occurs in the biosynthesis gas generation plant are/is used as useful gas for operating the chemical plant and/or the biotechnology plant and/or the blast furnace for the production of pig iron and/or the converter steel works for the production of crude steel and/or the coke oven plant.

30. The method for operating a plant complex of claim 25 wherein the plant complex further comprises a plant for gas purification and/or gas conditioning which is connected to the gas pipeline system, wherein at least a partial amount of the 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 production of crude steel and/or a partial amount of the biogas that occurs in the biogas plant and/or a partial amount of the coke oven gas that occurs in the production of coke in the coke oven plant and/or a partial amount of the hydrogen that occurs in the hydrogen generation plant and/or a partial amount of the biosynthesis gas that occurs in the biosynthesis gas generation plant are/is purified and/or conditioned.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The invention will be explained hereunder by means of a drawing which merely illustrates an exemplary embodiment. In a schematic manner in the drawing:

[0040] FIG. 1 shows a highly simplified block diagram of a plant complex according to the invention for producing steel.

[0041] A plant complex for producing steel according to one embodiment of the invention is illustrated in FIG. 1, said plant complex having a blast furnace 1 for producing pig iron; a converter steel works 2 for producing crude steel; and a gas pipeline system 3, illustrated with solid lines, for gases that occur in the production of pig iron and/or the production of crude steel. A biogas plant 6 and a chemical plant 4 and/or a biotechnology plant 5 are connected to the gas pipeline system 3. Additionally, a coke oven plant 7 and/or a hydrogen generation plant 8 and/or a biosynthesis gas generation plant 9 are/is connected to the gas pipeline system 3. The plant complex additionally has a power generation plant 10 which is conceived as a gas-turbine power generation plant or a gas-turbine and steam-turbine power generation plant. The electric current produced by the power generation plant 10 can be distributed by way of a power line network 16, illustrated with dotted lines, to individual devices and/or a plurality of devices of the plant complex. The gas pipeline system 3 comprises an operatively controllable gas diverter 11 for dividing the streams of gas fed to the chemical plant 4 and/or the biotechnology plant 5 and/or the hydrogen generation plant 8 and/or the power generation plant 10 and/or the coke oven plant 7 and/or the biosynthesis gas generation plant 9. At least one mixing device 12 for producing a mixed gas composed of blast-furnace top gas and/or converter gas and/or biogas and/or coke oven gas and/or hydrogen and/or oxygen and/or biosynthesis gas is arranged in the flow direction upstream of the at least one operatively controllable gas diverter 11, and streams of gas that are fed to the chemical plant 4 and/or the biotechnology plant 5 and/or the hydrogen generation plant 8 and/or the power generation plant 10 and/or the coke oven plant 7 and/or the biosynthesis gas generation plant 9 are able to be controlled by means of the operatively controllable gas diverter 11. The plant complex additionally has an energy accumulator 13 for covering at least part of the electricity requirement of the plant complex. A plant for gas conditioning 15 and/or gas purification 14 is additionally arranged in the plant complex. The optional devices of the plant complex are illustrated with dashed lines.

INDUSTRIAL APPLICABILITY

[0042] A plant complex for producing steel and a method for operating a plant complex of the type described above can be used in the production of steel.

LIST OF REFERENCE SIGNS

[0043] 1=Blast furnace [0044] 2=Converter steel works [0045] 3=Gas pipeline system [0046] 4=Chemical plant [0047] 5=Biotechnology plant [0048] 6=Biogas plant [0049] 7=Coke oven plant [0050] 8=Hydrogen generation plant [0051] 9=Biosynthesis gas generation plant [0052] 10=Power generation plant [0053] 11=Operatively controllable gas diverter [0054] 12=Mixing device [0055] 13=Energy accumulator [0056] 14=Plant for gas purification= [0057] 15=Plant for gas conditioning [0058] 16=Power line network