Flame mitigation device and system

• US 9,757,602 B2
• Filed: 10/13/2010
• Issued: 09/12/2017
• Est. Priority Date: 10/14/2009
• Status: Active Grant

• Current Assignee: BS&B Safety Systems LLC (International Systems & Controls Corp.)
• Original Assignee: BS&B Safety Systems LLC (International Systems & Controls Corp.)
• Inventors: Brazier, Geoffrey
• Primary Examiner(s): Hall, Arthur O
• Assistant Examiner(s): Barrera, Juan C
• Application Number:
  US13/501,996
• Publication Number:
  US 20120312565A1
• Time in Patent Office: 2,526 Days
• Field of Search: 169 5, 169 6, 169 7, 169 8, 169 9, 169 11, 169 15, 169 19, 169 20, 169 21, 169 41, 169 23, 169 60, 169 69, 169 61, 454169
• CPC Class Codes: A62C 3/04 for dust or loosely-baled or loosely-piled materials, e.g. in silos, in chimneys flame traps A62C4/00
• CPC Class Codes: A62C 3/06 of highly inflammable material, e.g. light metals, petroleum products
• CPC Class Codes: A62C 37/36 an actuating signal being generated by a sensor separate from an outlet device
• CPC Class Codes: A62C 99/00 Subject matter not provided for in other groups of this subclass

Abstract

A flame mitigation device (26), along with associated systems and methods, is disclosed. More particularly, a flame mitigation device (26) has at least one sensor (25) configured to sense a flame (21), and at least one suppression agent (28) release device configured to release a flame suppression agent into the projected flame path when the flame is sensed. The sensor (25) may sense the flame either directly or indirectly. A flame mitigation system (26) is also disclosed, wherein the system includes an enclosure (22) and at least one pressure release device configured to release a flame from the enclosure. The system (26) may include at least one sensor (25) configured to sense the flame (21), and a device configured to release a suppression agent (28). A method of mitigating a flame in a combustible material system is also disclosed.

Claims

1. A flame mitigation device for a combustible material system having a projected flame path for a flame to be released from the system in the event of an explosion, comprising:

at least one sensor configured to sense a flame and generate a signal in the event of an explosion;

at least one duct configured to direct the path of a flame in the event of an explosion;

at least one pressure release device configured to release a flame from the duct into the external environment, the pressure release device having an outlet side; and

at least one suppression agent release device oriented on the outlet side of the pressure release device, the suppression agent release device configured to release a flame suppression agent into the projected flame path in response to the signal from the at least one sensor.

2. The flame mitigation device of claim 1, wherein the at least one sensor is configured to sense the flame directly.

3. The flame mitigation device of claim 2, wherein the at least one sensor comprises at least one of an optical sensor, infrared sensor, or mechanical trip sensor.

4. The flame mitigation device of claim 1, wherein the at least one sensor is configured to sense the flame indirectly.

5. The flame mitigation device of claim 4, wherein the at least one sensor comprises at least one of a temperature sensor or a pressure sensor.

6. The flame mitigation device of claim 4, wherein the at least one sensor comprises a sensor configured to sense a pressure wave moving ahead of the flame.

7. The flame mitigation device of claim 1, wherein the suppression agent comprises at least one of a dry agent, a liquid agent, a foam agent, or a gaseous agent.

8. The flame mitigation device of claim 1, wherein the combustible material system comprises an enclosure containing a combustible material, and wherein the flame mitigation device is positioned external to the enclosure.

9. The flame mitigation device of claim 1, further comprising an explosion suppression system.

10. The flame mitigation device of claim 1, further comprising a passive flame mitigation device.

11. A flame mitigation system, comprising:

an enclosure;

at least one pressure release device configured to release a flame from the enclosure via a ductless outlet in the event of an explosion, the pressure release device having an outlet side;

at least one sensor configured to sense the flame, the at least one sensor further configured to generate a signal upon sensing the flame; and

a suppression agent release device oriented on the outlet side of the pressure release device, the suppression agent release device configured to release a flame suppression agent into the path of the flame in response to the signal generated by the at least one sensor.

12. The flame mitigation system of claim 11, wherein the at least one sensor is further configured to sense a condition within the enclosure.

13. The flame mitigation system of claim 11, wherein the at least one sensor is further configured to sense the effects of the flame on one or more components of the system.

14. The flame mitigation system of claim 13, wherein the at least one sensor is further configured to sense a temperature of one or more components of the system.

15. The flame mitigation system of claim 13, further comprising:

an explosion suppression system;

wherein the at least one sensor is further configured to sense the effects of the flame on the explosion suppression system.

16. The flame mitigation system of claim 11, wherein the at least one sensor is positioned between the pressure release device and the agent release device.

17. The flame mitigation system of claim 11, wherein the at least one sensor is further configured to sense an activation of the pressure release device.

18. The flame mitigation system of claim 11, further comprising:

an explosion suppression system configured to suppress an explosion within the enclosure.

19. The flame mitigation system of claim 18, wherein:

the at least one sensor is further configured to sense when the explosion suppression system is activated.

20. A method of mitigating a flame in a combustible material system, comprising:

sensing a flame in an enclosure in the event of an explosion and generating a signal;

identifying a projected path of the flame based on a sensed characteristic of the flame; and

releasing a flame suppression agent in response to the signal into the projected path of the flame before the flame reaches the projected path;

wherein the projected path is external to the enclosure.

21. The method of claim 20, wherein sensing a flame further comprises sensing one or more of visible light, infrared radiation, temperature, or pressure.

22. The method of claim 20, wherein sensing a flame further comprises tripping a mechanical sensor in response to the flame.

23. The method of claim 20, wherein releasing a flame suppression agent further comprises releasing a flame suppression agent into the enclosure.

24. The method of claim 20, wherein the projected path of the flame extends outside of the enclosure, and wherein releasing a flame suppression agent further comprising releasing a flame suppression agent into the projected path of the flame outside of the enclosure.