Melting device

Patent metadata

Field	Value
Publication number	US-2025154042-A1
Application number	US-202218725424-A
Country	US
Kind code	A1
Filing date	Dec 9, 2022
Priority date	Dec 30, 2021
Publication date	May 15, 2025
Grant date	—

Abstract

The present invention relates to a melting device, comprising a melting space in which material can be melted and which is enclosed by at least a bottom wall and a side wall, the melting device further comprising at least one electric heater (E) and at least one submerged burner (F) disposed in the melting space to heat material.

First claim

1 - 15 . (canceled)

16 . A melting device, comprising a melting space in which material can be melted and which is enclosed by at least a bottom wall and a side wall, characterized in that the melting device further comprises at least one electric heater (E) and at least one submerged burner (F) disposed in the melting space to heat material.

17 . The melting device of claim 16 , wherein the submerged burner (F) and the electric heater (E) are configured such that a hot point (K) in the melting space is located downstream of the submerged burner (F) in a melt flow direction, the melt flow direction being a direction in which a material melt flows in the melting space and is discharged from the melting space.

18 . The melting device of claim 16 , wherein, in a melt flow direction in which a material melt flows in the melting space and is discharged from the melting space, the submerged burner (F) is disposed upstream of the electric heater (E).

19 . The melting device of claim 16 , wherein the submerged burner (F) and the electric heater (E) are configured such that, of the energy used to heat and melt material, 50% or more and preferably 70%-80% comes from the electric heater, and less than 50% and preferably less than 20% comes from the submerged burner.

20 . The melting device of claim 17 , wherein the submerged burner (F) and the electric heater (E) are configured such that, of the energy used to heat and melt material, 50% or more and preferably 70%-80% comes from the electric heater (E), and less than 50% and preferably less than 20% comes from the submerged burner.

21 . The melting device as claimed in claim 19 , characterized in that the melting device further comprises a burner (R) disposed above a surface(S) of a material melt, the burner being configured to supply a portion of the energy used to heat and melt material other than energy supplied by the submerged burner (F) and the electric heater (E), said portion being 10% for example.

22 . The melting device of claim 16 , wherein the submerged burner (F) is configured such that fuel and oxidant supplied thereto are split into a first portion supplied continuously and a second portion supplied intermittently, a flow rate of the first portion being less than a flow rate of the second portion, and preferably, a ratio of flow rates of the first portion and the second portion being adjustable, and/or a supply frequency and/or supply duration of the second portion being adjustable.

23 . The melting device of claim 16 , characterized in that the submerged burner (F) uses hydrogen as fuel.

24 . The melting device of claim 16 , wherein the at least one submerged burner (F) comprises multiple submerged burners (F 1 , F 2 , F 3 ) protruding from the bottom wall into a material melt, and heights to which the multiple submerged burners protrude from the bottom wall increase successively in the melt flow direction.

25 . The melting device of claim 17 , wherein the at least one submerged burner (F) comprises multiple submerged burners (F 1 , F 2 , F 3 ) protruding from the bottom wall into a material melt, and heights to which the multiple submerged burners protrude from the bottom wall increase successively in the melt flow direction.

26 . The melting device of claim 19 , wherein the at least one submerged burner (F) comprises multiple submerged burners (F 1 , F 2 , FE) protruding from the bottom wall into a material melt, and heights to which the multiple submerged burners protrude from the bottom wall increase successively in the melt flow direction.

27 . The melting device of claim 16 , wherein upstream of the electric heater (E), the bottom wall comprises multiple protrusions (C 1 , C 2 , C 3 ) protruding into a material melt, and heights of the multiple protrusions increase successively in the melt flow direction.

28 . The melting device of claim 17 , wherein upstream of the electric heater (E), the bottom wall comprises multiple protrusions (C 1 , C 2 , C 3 ) protruding into a material melt, and heights of the multiple protrusions increase successively in the melt flow direction.

29 . The melting device of claim 27 , wherein upstream of the electric heater (E), the bottom wall comprises multiple protrusions (C 1 , C 2 , C 3 ) protruding into a material melt, and heights of the multiple protrusions increase successively in the melt flow direction.

30 . The melting device of claim 27 , wherein the submerged burner (F) extends from a top end of each said protrusion.

31 . The melting device of claim 30 , wherein a cooling medium nozzle or pipeline (L) for cooling the submerged burner (F) is accommodated in the protrusion (C 1 , C 2 , C 3 ).

32 . The melting device of claim 16 , wherein the at least one submerged burner (F) comprises two or more submerged burners, which share a cooling system and/or a system for supplying fuel and oxidant.

33 . The melting device of claim 16 , wherein the material melt is molten glass, molten metal, molten resin, or solid waste in a molten state.

34 . The melting device of claim 16 , wherein the submerged burner (F) comprises a fuel pathway and an oxidant pathway, which are configured to respectively discharge fuel and oxidant to the outside of the submerged burner (F) so that the fuel and oxidant mix outside.

35 . The melting device of claim 34 , wherein at least one of the fuel pathway and the oxidant pathway is configured such that the discharged fuel and/or oxidant forms a rotational flow.

Assignees

• Lair Liquide Sa Pour Letude Et L’Exploitation Des Procedes Georges Claude

Inventors

• Yan Tao
• Tsiava Remi

Classifications

• C03B2211/23

  using oxygen, i.e. pure oxygen or oxygen-enriched air · CPC title

• C03B5/03

  Tank furnaces · CPC title

• C03B5/2353 Primary

  by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances · CPC title

• C03B2211/20

  Submerged gas heating · CPC title

• C03B5/235

  Heating the glass (C03B5/02, C03B5/18, C03B5/225 take precedence) · CPC title