Process to stop and/or prevent the spreading of peat fires

Patent metadata

Field	Value
Publication number	US-10188883-B2
Application number	US-201214369131-A
Country	US
Kind code	B2
Filing date	Jan 9, 2012
Priority date	Jan 9, 2012
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

Process to stop and/or prevent the spreading of peat fires consisting of:
digging a trench in the periphery of the area of outbreak of fire or potential fire, filling the trench at least partially with a superabsorbent (co)polymer (SAP).

First claim

The invention claimed is:

1. A process to stop and/or prevent the spreading of peat fire, the process comprising:
digging a trench into soil of a periphery of an area of outbreak of peat fire or potential peat fire, wherein at least some peat is in the soil; and
filling said trench at least partially with at least one superabsorbent (co)polymer (SAP), wherein the at least one superabsorbent (co)polymer (SAP) is an acrylamide and partially or totally salified acrylic acid crosslinked copolymer and contains between 40 and 90 mole percentage (mol %) of acrylamide and between 10 and 60 mol % of partially or totally salified acrylic acid.

2. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) is partially or totally swollen with water before filling the trench.

3. Process according to claim 2 wherein the water is mixed with one or more compounds capable of improving the extinguishing ability of the said water, and wherein the one or more compounds are phosphate, bicarbonate, or urea.

4. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) is deposited directly in the trench then totally or partially swollen with prior or subsequent input of water.

5. Process according to claim 4 wherein the water is mixed with one or more compounds capable of improving the extinguishing ability of the said water, wherein the one or more compounds are phosphate, bicarbonate or urea.

6. Process according to claim 1 wherein the trench is 20 to 40 centimeters wide.

7. Process according to claim 1 wherein the trench is up to 8 meters in depth.

8. Process according to claim 1 wherein the
partially or totally salified acrylic acid is in the form of a sodium salt.

9. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) undergoes double crosslinking by an acrylic crosslinking agent at a rate of 100 to 1,000 parts per million (ppm) and an allylic crosslinking agent at a rate of 1,000 to 5000 ppm.

10. Process according to claim 9 wherein the acrylic crosslinking agent is MBA (methylenebisacrylamide) and wherein the allylic crosslinking agent is tetra-allylammonium chloride.

11. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) is mixed with 10 to 20% calcium carbonate or sodium carbonate.

12. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) is continuously partially or totally swollen in successive tanks and is injected into the trench.

13. Process according to claim 1 wherein the at least one superabsorbent (co)polymer (SAP) is swollen in a processing center and transported by tanker trucks to a treatment site where the process is performed.

14. A process to stop and/or prevent the spreading of peat fire, the process comprising:
digging a trench into soil of a periphery of an area of outbreak of peat fire or potential peat fire, wherein at least some of the peat is in the soil; and
filling said trench at least partially with at least one superabsorbent (co)polymer (SAP), wherein the at least one superabsorbent (co)polymer (SAP) undergoes double crosslinking by an acrylic crosslinking agent at a rate of 100 to 1,000 parts per million (ppm) and an allylic crosslinking agent at a rate of 1,000 to 5000 ppm.

15. The process according to claim 14 wherein the acrylic crosslinking agent is MBA (methylenebisacrylamide) and wherein the allylic crosslinking agent is tetra-allylammonium chloride.

16. The process according to claim 14 wherein the at least one superabsorbent (co)polymer (SAP) is partially or totally swollen with water before filling the trench.

17. The process according to claim 14 wherein the at least one superabsorbent (co)polymer (SAP) is deposited directly in the trench then totally or partially swollen with prior or subsequent input of water.

18. The process according to claim 14 wherein the trench is 20 to 40 centimeters wide.

19. The process according to claim 14 wherein the trench is up to 8 meters in depth.

20. The process according to claim 14 wherein the at least one superabsorbent (co)polymer (SAP) is a crosslinked copolymer or a crosslinked polyacrylic acid, wherein:
the crosslinked copolymer is a copolymer of acrylamide and partially or totally salified acrylic acid, and
the crosslinked polyacrylic acid is partially or totally salified.

Assignees

• Pich Rene
• Spcm Sa

Inventors

• Pich René

Classifications

• E02F5/02

  for digging trenches or ditches ({machines for making foundation slots E02F3/205, E02F3/475 take precedence}; agricultural ploughs for working ridges A01B13/02) · CPC title

• A62C3/0278 Primary

  by creating zones devoid of flammable material · CPC title

• E02F5/14

  Component parts for trench excavators, e.g. indicating devices {travelling gear chassis, supports, skids} · CPC title