Off-gas hood for a basic oxygen furnace and method of repair

A panel for constructing a furnace hood comprising:

• a) an inlet header for receiving cooling water;
• b) an outlet header spaced apart from said inlet header;
• c) a plurality of tubes communicating with said inlet header and said outlet header, said tubes being arranged adjacent to one another to define an inside surface that is exposable to furnace gases and an outside surface opposite to said inside surface, wherein said inlet header and said outlet header are offset back from said inside surface such that said inlet header and said outlet header remain substantially apart from said gases, said tubes having turns at opposite ends of the inside surface, each turn being toward a respective one of said inlet header and outlet header, to accommodate said offset;
• and
• d) at least one jumper pipe extending outward from said outlet header discharging cooling water from said outlet header.

A furnace hood comprising:

• a) an assemblage of panels fastened together to form a flue for receiving gases generated by a furnace, each panel including:
• i) an inlet header for receiving cooling water;
• ii) an outlet header for discharging cooling water;
• iii) a plurality of tubes forming a fluid connection between said inlet header and said outlet header to distribute cooling water there between, said tubes being arranged adjacent to one another to define an inside surface exposed to said gases and an outside surface opposite to said inside surface, wherein said inlet header and said outlet header are offset back from said inside surface such that said inlet header and said outlet header remain substantially apart from said gases, said tubes having turns at opposite ends of the inside surface, each turn being toward a respective one of said inlet header and outlet header, to accommodate said offset;
• and
• iv) jumper pipes forming a fluid connection between outlet headers and inlet headers located in adjacent panels, the jumper pipes distributing cooling water between said adjacent panels and thereby providing a continuous flow of cooling water along a length of the flue.

A furnace hood device for exhausting furnace gas from a work area, said furnace hood device comprising:

• a) at least two panels fastened together to provide a flue positioned at a location to receive gases generated by a furnace, each of said at least two panels comprising:
• i) an inlet header for receiving cooling water;
• ii) an outlet header;
• iii) a plurality of tubes attached to and distributing the cooling water from said inlet header to said outlet header, said tubes being arranged adjacent to one another to define an inside surface exposed to said gases and an outside surface opposite to said inside surface;
• iv) at least one jumper pipe forming a fluid connection between an outlet header in a first panel and an inlet header in a second panel of said at least two panels, said jumper pipe providing means for distributing cooling water between the panels;
• and
• v) connector plates extending along each panel, and offset back from the inside and outside surfaces, said panels being fastened to one another using said collector plates, said tubes having turns at opposite ends of the inside surface, each turn being toward a respective one of said collector plates.

A panel for constructing a furnace hood comprising:

• i) an inlet header for receiving cooling water;
• ii) an outlet header;
• iii) a plurality of tubes attached to and distributing the cooling water from said inlet header to said outlet header, said tubes being arranged adjacent to one another to define an inside surface that can be exposed to furnace gases and an outside surface opposite to said inside surface;
• iv) at least one jumper pipe forming a fluid connection between an outlet header in a first panel and an inlet header in a second panel of said at least two panels, said jumper pipe providing means for distributing cooling water between the panels;
• and
• v) connector plates extending along each panel, and offset back from the inside and outside surfaces, said tubes having turns at opposite ends of the inside surface, each turn being toward a respective one of said collector plates.

A furnace hood comprising:

• a) an assemblage of panels fastened together to form a flue for receiving gases generated by a furnace, each panel including:
• i) an inlet header for receiving cooling water;
• ii) an outlet header;
• iii) a plurality of tubes attached to and distributing the cooling water from said inlet header to said outlet header, said tubes being arranged adjacent to one another to define an inside surface exposed to said gases and an outside surface opposite to said inside surface;
• iv) at least one jumper pipe forming a fluid connection between an outlet header in a first panel and an inlet header in a second panel of said at least two panels, said jumper pipe providing means for distributing cooling water between the panels;
• and
• v) connector plates extending along each panel, and offset back from the inside and outside surfaces, said panels being fastened to one another using said collector plates, said tubes having turns at opposite ends of the inside surface, each turn being toward a respective one of said collector plates.