Furnaces |
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| 申请号 | US3669426D | 申请日 | 1970-10-26 | 公开(公告)号 | US3669426A | 公开(公告)日 | 1972-06-13 |
| 申请人 | FERRO CORP; | 发明人 | WHITEHOUSE ROBERT GEORGE; | ||||
| 摘要 | A direct fired tunnel-type continuous heat treating furnace, particularly adapted to fire porcelain enamel articles, wherein the conventional muffle has been eliminated in favor of a system of perforate refractory shapes, so disposed to channel, and directly and evenly distribute, heat from the burners of said furnace throughout its hot zone. | ||||||
| 权利要求 | 1. A direct fired tunnel furnace having a furnace chamber bounded by a bottom wall and a pair of opposed side walls; a plurality of main duct systems each comprising a two ended underfloor duct in said bottom wall, a main rising duct in one of said side walls disposed at an angle to said floor duct, connected directly to, and communicating directly with, one end of said underfloor duct, a plurality of flue ports in said underfloor and main rising ducts connecting said ducts to said furnAce chamber, a plurality of burners each associated with a respective one of said duct systems and arranged to discharge hot flue gases into said underfloor duct at one end thereof opposite the end connected to, and communicating directly with, said main rising duct. 2. The tunnel furnace of claim 1 wherein said side walls are each composed of a plurality of blocks loosely assembled one on another and each having main apertures therethrough, main apertures of adjacent blocks being in register with each other to form said main rising ducts, said blocks further having side apertures therethrough intersecting said main apertures to form said flue ports. 3. The tunnel furnace of claim 1 wherein said furnace chamber is of U configuration in plan having a common partition wall in which said rising ducts are formed adjacent rising ducts being connected to respective underfloor ducts on opposite sides of said partition wall. 4. The tunnel furnace of claim 1 wherein said furnace is of the straight through type, and successive burners along said tunnel are arranged on alternate sides of said tunnel. |
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