Heater blanket for in-situ soil heating
A heater blanket for use in in-situ treatment of contaminated soil is described comprising: a plurality of flexible electric heaters; an insulating blanket covering said plurality of heaters; a rigid support frame resting on said blanket; a plurality of pins slidingly inserted through said heaters, said blanket and said support frame, said pins being terminated at each end, when in place, by a head which prevents removal of said pin while said heads remain in place; an impermeable canopy over said support frame, the sides of said canopy resting on said blanket when in place; a plurality of attachment lugs rigidly connected to said support frame and said canopy, respectively, said lugs having holes therein, selected ones of said support frame and said canopy lug holes being in alignment when said canopy is in place; a connecting rod inserted through selected ones of said aligned holes, said rods being inserted through a plurality of access holes in the side of said canopy; a second and third layer of insulation located between said support frame and said canopy; a skirt sealingly attached to the periphery of said canopy, said canopy and said skirt, when in place, covering said contaminated soil; a vapor collection port extending through said canopy to said contaminated soil; a vapor collection system connected to said vapor collection port at the surface of said contaminated soil; heater heads connected to said heaters, said heater leads extending along the top of said insulation; electrical feeds-through in said canopy for connecting said heater leads through said canopy; rigid attachment points located on said canopy for lifting said heater blanket for placement thereof, and power supply means for supplying electric power to said feed-through terminals.
- Assignee:
- Shell Oil Co., Houston, TX (United States)
- Patent Number(s):
- US 5221827; A
- Application Number:
- PPN: US 7-834081
- OSTI ID:
- 6338668
- Resource Relation:
- Patent File Date: 12 Feb 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Poke hole closure apparatus
Design of a 2 Slot VLPC Cryostat Cooled by a Cryocooler