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    • 4. 发明授权
    • Method for remediating near-surface contaminated soil
    • 补救近地表污染土壤的方法
    • US06419423B1
    • 2002-07-16
    • US09168769
    • 1998-10-08
    • Harold J. VinegarEric de RouffignacLawrence James Bielamowicz
    • Harold J. VinegarEric de RouffignacLawrence James Bielamowicz
    • B09B300
    • B09C1/06B09C2101/00
    • A method is provided to remove contaminants from near-surface contaminated soil, the method including the steps of: placing a plurality of metal sheets on the surface above the contaminated soil to form a contiguous cover over at least a portion of the contaminated soil; seal welding adjacent metal sheets together; cutting a plurality of holes in the metal sheet; providing a plurality of heater wells and a plurality of vapor extraction wells into the contaminated soil through the holes cut in the metal sheets; providing vapor extraction wellheads over the vapor extraction wells, the vapor extraction wellheads sealed to the metal sheets; and removing contaminants from the near-surface soil by heating from the heater wells and extracting vapor through the vapor extraction wells. The wells are preferably both heater wells and vapor extraction wells, and the wellheads are preferably bolted to a flange which is welded to the metal sheets to ensure a positive seal at the surface. Insulation is preferably placed over the metal sheets prior to heating of the soil, and a rain cover placed over the insulation to keep rain out of the insulation and away from the soil being heated. The edges of the contiguous cover are preferably sealed by a vertical metal sheet placed into the soil, with a 90 degree angled lip on top, and the lip attached to the edge of the continuous sheet to form the seal.
    • 提供了一种从近地表面污染的土壤中去除污染物的方法,所述方法包括以下步骤:将多个金属片放置在污染土壤上方的表面上,以在污染土壤的至少一部分上形成连续的覆盖物; 将相邻的金属板密封在一起; 切割金属片中的多个孔; 通过在金属片上切割的孔,将多个加热井和多个蒸气提取井提供到污染土壤中; 在蒸气提取井上提供蒸气提取井口,将蒸气提取井口密封在金属板上; 并通过从加热井加热并通过蒸气提取井提取蒸汽从附近的土壤中除去污染物。 井优选地是加热井和蒸气提取井,并且井口优选地螺栓连接到焊接到金属板上的凸缘,以确保表面处的正密封。 在加热土壤之前,优选将绝缘材料放置在金属板上,并且将覆盖物放置在隔热层上以将雨从保温层中排出并远离被加热的土壤。 连续盖的边缘优选地通过放置在土壤中的垂直金属片密封,顶部具有90度角的唇缘,并且唇缘附接到连续片的边缘以形成密封。