Method for increasing the penetration depth of an oxygen stream
View Patent ↗A method and device are disclosed for automatically evaluating a delivery system in respect of the energy efficiency and emissions efficiency thereof. The method may include: determining a service level for the delivery system according to an energy intensity and an evaluation relevance of the particular delivery system, detecting energy data and emissions data of the delivery system corresponding to the determined service level of the delivery system, and calculating at least one indicator based on the detected energy data and emissions data and/or based on data for the energy management and environmental management of the delivery system for evaluating the delivery system with respect to the energy efficiency and emissions efficiency thereof.
1. A method for increasing a penetration depth of an oxygen stream of technically pure oxygen entering with a volume flow and a mass flow and with a flow speed through at least one oxygen nozzle into the bed of an iron ore production unit for gasification of carbon carriers present in the bed, the method comprising:
increasing the volume flow of the oxygen stream while the mass flow of the oxygen stream remains constant by increasing the diameter of the at least one oxygen nozzle, and
increasing a temperature of the oxygen stream while the flow speed remains constant.
2. The method of claim 1 , comprising increasing the temperature of the oxygen stream by at least one of the following techniques:
combustion of a sold, liquid or gaseous fuel with oxygen via a burner, and mixing of the hot gas obtained therein with the oxygen,
mixing of oxygen with steam and/or hot nitrogen in a mixing chamber or at the blast input point,
use of indirect heat exchangers, and
preheating of oxygen by means of a plasma burner and mixing with oxygen not preheated in this way.
3. The method of claim 1 , wherein the oxygen stream enters the bed at an entry pressure, and the method comprises reducing the entry pressure while the mass flow remains constant.
4. The method of claim 1 , wherein the temperature of the oxygen stream entering the bed amounts to at least 200° C.
5. The method of claim 1 , wherein the temperature of the oxygen stream entering the bed amounts to at least 250° C.
6. The method of claim 1 , wherein the flow speed of the oxygen stream entering the bed lies in a range between 100 m/s and the speed of sound.
7. The method of claim 1 , wherein the flow speed of the oxygen stream entering the bed lies in a range between 150 m/s and 300 m/s.
8. The method of claim 1 , comprising injecting carbon carriers in solid or liquid or gaseous form into the oxygen stream before a raceway formed in an area of the entry of the oxygen stream into the bed and/or in the raceway.