Post-manufacturing processes for submerged combustion burner

Patent metadata

Field	Value
Publication number	US-9751792-B2
Application number	US-201514824981-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 12, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A portion of a submerged combustion burner is disposed into a pressure vessel. The portion of the submerged combustion burner has a welded area that has a first microstructure defined by a first number of voids. The vessel is filled with an inert gas, pressurized, and heated. Pressurizing and heating operations are performed for a time and at a temperature and a pressure sufficient to produce a second microstructure in the welded area of the burner. The second microstructure is defined by a second number of voids less than the first number of voids.

First claim

What is claimed is:

1. A method comprising:
disposing at least a portion of a submerged combustion burner into a pressure vessel, wherein the portion of the submerged combustion burner has a first microstructure defined by a first number of voids;
filling the pressure vessel containing the portion of the submerged combustion burner with an inert gas;
pressurizing the pressure vessel containing the portion of the submerged combustion burner;
heating the pressure vessel containing the portion of the submerged combustion burner, wherein the pressurizing and heating operations are performed for a time and at a temperature and a pressure sufficient to produce a second microstructure in the burner, wherein the second microstructure is defined by a second number of voids less than the first number of voids; and
weld-repairing a defect in the portion of the submerged burner before disposing the portion of the submerged combustion burner in the pressure vessel.

2. The method of claim 1 , wherein the portion of the submerged combustion burner comprises at least one of a burner body, a burner tip, and a burner base, and wherein the portion of the submerged combustion burner comprises a weld.

3. The method of claim 1 , wherein the temperature is in a range from about 2200 degrees F. to about 3000 degrees F.

4. The method of claim 3 , wherein the temperature is in a range from about 2450 degrees F. to about 2750 degrees F.

5. The method of claim 4 , wherein the temperature is about 2600 degrees F.

6. The method of claim 1 , wherein the time is in a range from about 100 minutes to about 1000 minutes.

7. The method of claim 6 , wherein the time is in a range from about 200 minutes to about 600 minutes.

8. The method of claim 7 , wherein in the time is about 365 minutes.

9. The method of claim 1 , wherein the pressure is in a range of between about 20,000 psi and about 50,000 psi.

10. The method of claim 9 , wherein the pressure is in a range of between about 25,000 psi and about 40,000 psi.

11. The method of claim 10 , wherein the pressure is about 30,000 psi.

12. The method of claim 1 , further comprising:
removing the portion of the submerged burner from the pressure vessel;
non-destructively testing the portion of the submerged burner for a defect;
weld-repairing the defect; and
returning the portion of the submerged combustion burner to the pressure vessel.

Assignees

• Johns Manville

Inventors

• Madeni Juan Carlos
• Baker John Wayne

Classifications

• F23D14/76

  Protecting flame and burner parts · CPC title

• C03B5/2356 Primary

  Submerged heating, e.g. by using heat pipes, hot gas or submerged combustion burners (bubblers C03B5/193) · CPC title

• C03B2211/60

  oxy-fuel burner construction · CPC title

• C21D1/74

  Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material · CPC title

• C21D9/50

  for welded joints · CPC title