Device for regulating the temperature of a gas in a hot gas main

A device for regulating a temperature of a gas in a hot gas main for feeding hot gas to a blast furnace, said device comprising:

• a mixing pot with a chamber,
• an inlet port for receiving hot gas,
• an inlet port for receiving cold gas
• an outlet port for evacuating mixed gas;
• a regulation system for controlling an amount of cold gas fed to the chamber;
• wherein said mixing pot comprises
• a housing with a first mixing chamber and a second mixing chamber defined therein, said first and second mixing chambers being in fluid communication with each other by means of a Venturi restriction;
• a first inlet port in said first mixing chamber for feeding hot gas into said first mixing chamber;
• a second inlet port with said first mixing chamber for feeding cold gas into said first mixing chamber;
• a third inlet port in said second mixing chamber for feeding cold gas into said second mixing chamber;
• a first outlet port in said first mixing chamber for feeding a first stream of mixed gas from said first mixing chamber to a first gas distribution system for feeding said first stream of mixed gas to said blast furnace at a first level;
• and
• a second outlet port in said second mixing chamber for feeding a second stream of mixed gas from said second mixing chamber to a second gas distribution system for feeding said second stream of mixed gas to said blast furnace at a second level,
• wherein said first stream of mixed gas has a temperature different from a temperature of said second stream of mixed gas.