Submerged combustion melter
View Patent ↗The invention relates to a submerged combustion burner ( 1 ) and to a inciter comprising submerged combustion burners ( 1 ). The burner comprises at least one oxidant feeding tube, at least one fuel feeding tube, a burner head having a peripheral envelope, the fuel and oxidant feeding tubes abutting against the burner head, at least two, preferably at least three, peripheral outward directed nozzles, each of the nozzles having a nozzle outlet, the nozzle outlets being arranged on a peripheral line on the peripheral envelope of the burner head, the nozzle outlet axis being inclined by an angle of 5 to 30° to the horizontal, and the nozzles practiced in the burner head being connected to the oxidant feeding tube and to the fuel feeding tube.
1. A method of introducing a flame and/or combustion products from a submerged combustion burner ( 1 ) into a melt through a multitude of nozzles comprising nozzle outlets radially arranged in a burner head, wherein the nozzle outlets of the nozzles are inclined by 5-30° with respect to the horizontal plane, and
wherein the submerged combustion burner ( 1 ) comprises
at least one oxidant feeding tube ( 5 , 9 ), at least one fuel feeding tube ( 7 ), and a burner head ( 11 ) having a peripheral envelope ( 13 ),
wherein the fuel and oxidant feeding tubes ( 5 , 7 , 9 ) abut against the burner head ( 11 ), which comprises at least two peripheral outward directed nozzles ( 21 ),
wherein each of the nozzles comprise a nozzle outlet ( 23 ), and the nozzle outlets ( 23 ) are arranged on a peripheral line ( 25 ) on the peripheral envelope ( 13 ) of the burner head ( 11 ),
wherein the nozzle outlet axis ( 22 ) is inclined at an angle of 5-30° with respect to the horizontal plane,
wherein the nozzles ( 21 ) in the burner head ( 11 ) are connected to the oxidant feeding tube ( 5 , 9 ) and to the fuel feeding tube ( 7 ),
wherein at least a part of the submerged combustion burner ( 1 ) is enveloped by a cooling jacket ( 31 ), the cooling jacket ( 31 ) extends over part of the length of the feeding tubes ( 5 , 7 , 9 ) up to the burner head ( 11 ) and comprises a first connecting tube ( 32 ),
the burner head ( 11 ) comprises a burner cap ( 33 ) defining a burner head space ( 35 ) between burner cap ( 33 ) and burner head ( 11 ), and
the burner head ( 11 ) further comprises through holes ( 37 ) connecting the cooling jacket ( 31 ) with the burner head space ( 35 ), and a cooling fluid feeding tube ( 39 ) extending concentrically in the internal gas feeding tube ( 5 ) and connecting the burner head space ( 35 ) with a second connecting tube ( 41 ).
2. The method of claim 1 , wherein the burner head comprises a circular burner head ( 11 ).
3. The method of claim 1 , wherein the fuel and oxidant feeding tubes ( 5 , 7 , 9 ) are concentric.
4. The method of claim 1 , wherein the submerged combustion burner comprises two feeding tubes selected from fuel feeding tubes, oxidant feeding tubes and combinations thereof.
5. The method of claim 1 , wherein the submerged combustion burner comprises three concentric feeding tubes ( 5 , 7 , 9 ), wherein the internal feeding tube ( 5 ) is an oxidant feeding tube, the middle feeding tube ( 7 ) is a fuel feeding tube, and the external feeding tube ( 9 ) is an oxidant feeding tube.
6. The method of claim 1 , wherein the burner head comprises at least two nozzle bores ( 22 ) extending radially through the burner head ( 11 ) starting from the nozzle outlet ( 23 ), each nozzle bore ( 22 ) being connected by feeding bores ( 27 , 28 , 29 ) to the relevant feeding tubes ( 5 , 7 , 9 ) extending up to and abutting against the burner head ( 11 ).
7. The method of claim 1 , further comprising a submerged combustion melter comprising a melting chamber ( 103 ) capable of comprising a melt and equipped with at least one submerged combustion burner ( 1 ).
8. The method of claim 7 , wherein the melting chamber comprises from 2-30 submerged combustion burners ( 1 ).
9. The method of claim 7 , wherein the melter comprises a glass melter and the submerged combustion burner(s) ( 1 ) are arranged at the bottom of the melter.
10. The method of claim 7 , wherein the glass melter is used for the manufacture of glass fibers, mineral wool fibers, glass wool or stone wool fibers.
11. The method of claim 7 , wherein the melting chamber is cylindrical and comprises an internal diameter of the melting chamber of about 1.5-3 m, and the melt height is about 0.75-2.2 m.
12. The method of claim 1 , wherein the melt is a glass melt capable of being formed into mineral fibers selected from glass fibers, continuous glass fibers, glass wool fibers and stone wool fibers.
13. The method of claim 1 , wherein the submerged combustion burner ( 1 ) is operably connected to an inert gas source.
14. The method of claim 1 , wherein the inert gas comprises nitrogen.