Pyrophoric liquid ignition system for pilot burners and flare tips

Patent metadata

Field	Value
Publication number	US-11187409-B2
Application number	US-201916710589-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Aug 29, 2017
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

Described herein are methods and systems for using pyrophoric liquids to ignite combustible gas.

First claim

The invention claimed is:

1. A method of igniting a stream of combustible waste gas, the method comprising steps of:
exposing at least one pyrophoric liquid to air to thereby ignite a flame;
contacting the flame with a pilot gas in the presence of a pilot burner to thereby ignite the pilot burner; and
exposing the stream of combustible waste gas to the ignited pilot burner, thereby igniting the combustible waste gas.

2. The method of claim 1 , wherein the at least one pyrophoric liquid comprises at least one of an alkylaluminum, an alkyllithium, an alkenyllithium, an aryllithium, an alkynyllithium, an alkylzinc, and an alkylborane.

3. The method of claim 2 , wherein the at least one pyrophoric liquid comprises at least one of an alkylaluminum and an alkylborane.

4. The method of claim 3 , wherein the at least one pyrophoric liquid comprises triethylaluminum, triethylborane, or a combination thereof.

5. The method of claim 4 , wherein the at least one pyrophoric liquid comprises a mixture of triethylaluminum and triethylborane.

6. A method of igniting a stream of combustible waste gas, the method comprising steps of:
exposing at least one pyrophoric liquid to air to thereby ignite a flame; and
contacting the flame with the combustible waste gas, thereby igniting the combustible waste gas, wherein the step of exposing at least one pyrophoric liquid to air occurs at a temperature of 0° C. or lower.

7. The method of claim 6 , wherein the at least one pyrophoric liquid comprises at least one of an alkylaluminum, an alkyllithium, an alkenyllithium, an aryllithium, an alkynyllithium, an alkylzinc, and an alkylborane.

8. The method of claim 7 , wherein the at least one pyrophoric liquid comprises at least one of an alkylaluminum and an alkylborane.

9. The method of claim 8 , wherein the at least one pyrophoric liquid comprises triethylaluminum, triethylborane, or a combination thereof.

10. The method of claim 9 , wherein the at least one pyrophoric liquid comprises a mixture of triethylaluminum and triethylborane.

11. The method of claim 6 , wherein the step of exposing at least one pyrophoric liquid to air occurs at a temperature of 0° C. or −20° C.

12. The method of claim 6 , wherein the step of exposing at least one pyrophoric liquid to air occurs at a temperature of 0° C. or −40° C.

Assignees

• Saudi Arabian Oil Co

Inventors

• Soliman Mohamed
• Al Abbas Ali

Classifications

• F23G7/085 Primary

  in stacks · CPC title

• F23N2227/00

  Ignition or checking · CPC title

• F23N2227/22

  Pilot burners · CPC title

• F23Q21/00

  Devices for effecting ignition from a remote location · CPC title

• F23Q2/02

  Lighters with liquid fuel {fuel which is fluid at atmospheric pressure} · CPC title