Fuel gas and oxygen burner

Patent metadata

Field	Value
Publication number	US-2021122660-A1
Application number	US-201916667692-A
Country	US
Kind code	A1
Filing date	Oct 29, 2019
Priority date	Oct 29, 2019
Publication date	Apr 29, 2021
Grant date	—

Abstract

A coaxial fuel and oxygen pipe apparatus can include a fuel pipe and an oxygen pipe, wherein the fuel pipe is contained within the oxygen pipe and the oxygen pipe comprises an internal diameter that is continuous without diameter changes along a length of the oxygen pipe. The fuel pipe can include an internal diameter that is continuous without diameter variations along a length of the fuel pipe. A discharge block includes a diverging section and a discharge that forms a final outlet with respect to the fuel pipe and the oxygen pipe. The discharge block is configured with two angles that can facilitate conditions for eliminating recirculation, wherein the two angles are matched to an expansion rate of the products of combustion to maintain a positive pressure throughout a final discharge from the final outlet.

First claim

What is claimed is:

1 . A coaxial fuel and oxygen pipe apparatus, comprising:
a fuel pipe and an oxygen pipe, wherein the fuel pipe is contained within the oxygen pipe and the oxygen pipe comprises an internal diameter that is continuous without diameter changes along a length of the oxygen pipe and wherein the fuel pipe comprises an internal diameter that is continuous without diameter variations along a length of the fuel pipe; and a discharge block having a diverging section and a discharge that forms a final outlet with respect to the fuel pipe and the oxygen pipe, wherein the discharge block is configured with two angles that facilitate conditions for eliminating recirculation, wherein the two angles are matched to an expansion rate of the products of combustion to maintain a positive pressure throughout a final discharge from the final outlet.

2 . The coaxial fuel and oxygen pipe apparatus of claim 1 further comprising a burner that is inserted into the discharge block.

3 . The coaxial fuel and oxygen pipe apparatus of claim 1 wherein oxygen enters the oxygen pipe through a burner at a right angle to a longitudinal axis of the burner and fuel enters the fuel pipe axially through the burner.

4 . The coaxial fuel and oxygen pipe apparatus of claim 1 further comprising a burner that is inserted into the discharge block, wherein oxygen enters the oxygen pipe through the burner at a right angle to a longitudinal axis of the burner and fuel enters the fuel pipe axially through the burner, wherein the fuel pipe extends beyond the oxygen pipe.

5 . The coaxial fuel and oxygen pipe apparatus of claim 1 wherein the fuel pipe is setback from the diverging section of the discharge block.

6 . The coaxial fuel and oxygen pipe apparatus of claim 1 wherein the discharge block is operable to accept the fuel pipe.

7 . The coaxial fuel and oxygen pipe apparatus of claim 1 wherein the throat matches an internal diameter of the oxygen pipe.

8 . The coaxial fuel and oxygen pipe apparatus of claim 1 wherein:
the discharge block is operable to accept the fuel pipe; and
the throat matches an internal diameter of the oxygen pipe.

9 . A coaxial fuel and oxygen pipe apparatus, comprising:
a fuel pipe and an oxygen pipe, wherein the fuel pipe is contained within the oxygen pipe and the oxygen pipe comprises an internal diameter that is continuous without diameter changes along a length of the oxygen pipe and wherein the fuel pipe comprises an internal diameter that is continuous without diameter variations along a length of the fuel pipe; a discharge block having a diverging section and a discharge that forms a final outlet with respect to the fuel pipe and the oxygen pipe, wherein the discharge block is configured with two angles that facilitate conditions for eliminating recirculation, wherein the two angles are matched to an expansion rate of the products of combustion to maintain a positive pressure throughout a final discharge from the final outlet; and a burner that is inserted into the discharge block.

10 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein oxygen enters the oxygen pipe through the burner at a right angle to a longitudinal axis of the burner and fuel enters the fuel pipe axially through the burner.

11 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein the fuel pipe extends beyond the oxygen pipe.

12 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein the fuel pipe is setback from the diverging section of the discharge block.

13 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein the discharge block is operable to accept the fuel pipe.

14 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein the throat matches an internal diameter of the oxygen pipe.

15 . The coaxial fuel and oxygen pipe apparatus of claim 9 wherein:
the discharge block is operable to accept the fuel pipe; and
the throat matches an internal diameter of the oxygen pipe.

16 . A forehearth, comprising:
a coaxial fuel and oxygen pipe apparatus that includes a fuel pipe and an oxygen pipe, wherein the fuel pipe is contained within the oxygen pipe and the oxygen pipe comprises an internal diameter that is continuous without diameter changes along a length of the oxygen pipe and wherein the fuel pipe comprises an internal diameter that is continuous without diameter variations along a length of the fuel pipe; a discharge block having a diverging section and a discharge that forms a final outlet with respect to the fuel pipe and the oxygen pipe, wherein the discharge block is configured with two angles that facilitate conditions for eliminating recirculation, wherein the two angles are matched to an expansion rate of the products of combustion to maintain a positive pressure throughout a final discharge from the final outlet; and a burner that is inserted into the discharge block, wherein oxygen enters the oxygen pipe through the burner at a right angle to a longitudinal axis of the burner and fuel enters the fuel pipe axially through the burner, wherein the fuel pipe extends beyond the oxygen pipe.

17 . The forehearth of claim 16 wherein the fuel pipe is setback from the diverging section of the discharge block.

18 . The forehearth of claim 16 wherein the discharge block is operable to accept the fuel pipe.

19 . The forehearth of claim 16 wherein the throat matches an internal diameter of the oxygen pipe.

20 . The forehearth of claim 1 wherein:
the discharge block is operable to accept the fuel pipe; and
the throat matches an internal diameter of the oxygen pipe.

Assignees

• Honeywell Int Inc

Inventors

• Weaver Joshua J
• Taylor Curtis L
• Scholler Marek
• Wright Bradley M

Classifications

• C03B2211/60

  oxy-fuel burner construction · 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

• Y02E20/34

  Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery · CPC title

• F23D14/32

  using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air (F23D14/38 takes precedence) · CPC title

• F23D14/22

  with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other · CPC title