초록 ▼

Method to process fumes performed on fumes discharged directly from furnaces (10) through an aperture (11) in their roof or from loading baskets (13) used to pre-heat scrap which is to be loaded into a furnace, the fumes (17) afterwards being sent to a purification plant (24) and to a chimney, the f

Method to process fumes performed on fumes discharged directly from furnaces (10) through an aperture (11) in their roof or from loading baskets (13) used to pre-heat scrap which is to be loaded into a furnace, the fumes (17) afterwards being sent to a purification plant (24) and to a chimney, the fumes (17) leaving the furnace (10) and/or the loading baskets (13) through a cooled conduit (14) being made to pass through at least a first transit chamber where they are subjected to a post-combustion process before being sent to the purification plant (24) and the chimney, the first transit chamber being a first expansion chamber and the fumes entering the first expansion chamber (15a) expanding in correspondence with a wider section (215a) therein at the entrance thereto and being deflected by a deflector element (18) arranged substantially at the center of the wider section (215a), the expansion and deflection causing the fumes to decelerate from a speed at the inlet of around 20 to 50 meters per second to a speed at the outlet of around 5 to 12 meters per second, the fumes then being subjected to a post-combustion process by means of at least one burner (20) arranged on the walls of the first expansion chamber (15a) and below the deflector element (18).

대표청구항 ▼

[ What is claimed is:] [1.] A method to process fumes discharged directly from a furnace (10) through an aperture (11) in a roof or from a loading basket (13) of the furnace used to pre-heat scrap which is to be loaded into said furnace (10),the fumes (17) afterwards being sent to a purification pla

[ What is claimed is:] [1.] A method to process fumes discharged directly from a furnace (10) through an aperture (11) in a roof or from a loading basket (13) of the furnace used to pre-heat scrap which is to be loaded into said furnace (10),the fumes (17) afterwards being sent to a purification plant (24) and to a chimney,the fumes (17) leaving at least one member of the group consisting of the furnace (10) and the loading basket (13) through a cooled conduit (14) being made to pass through at least a first transit chamber where the fumes are subjected to a post-combustion process before being sent to said purification plant (24) and said chimney,said first transit chamber comprises a first expansion chamber (15a) and the fumes entering said first expansion chamber (15a) expand in correspondence with a wider section (215a) therein at an inlet thereto and are deflected by a deflector element (18) arranged substantially at the center of said wider section (215a), the expansion and deflection causing the fumes to decelerate from a speed at the inlet of the first expansion chamber of around 20 to 50 meters per second to a speed at an outlet of the first expansion chamber of around 5 to 12 meters per second,the fumes then being subjected to a post-combustion process by means of at least one burner (20) arranged on the walls of said first expansion chamber (15a) and below said deflector element (18).