公开(公告)号：US5484985A

公开(公告)日：1996-01-16

申请号：US291260

申请日：1994-08-16

申请人： William A. Edelstein ,  Icko T. Iben ,  Otward M. Mueller ,  Egidijus E. Uzgiris ,  Peter B. Roemer

发明人： William A. Edelstein ,  Icko T. Iben ,  Otward M. Mueller ,  Egidijus E. Uzgiris ,  Peter B. Roemer

IPC分类号： B09C1/06 ,  E21B36/04 ,  E21B43/00 ,  H05B6/62 ,  H05B6/54

CPC分类号： B09C1/06 ,  E21B36/04 ,  E21B43/003 ,  H05B6/62 ,  B09C2101/00

摘要： An in-situ method of extracting contaminants from a soil volume comprises applying a radiofrequency (RF) excitation signal to heat the soil with an array of electrodes. The electrodes are inserted into the contaminated volume or inserted into a matrix of holes drilled into the volume. A first row of electrodes is electrically coupled to a shield of a coaxial cable, with a second row electrically coupled to the central conductor of the coaxial cable. RF energy is applied to pairs of electrode rows through the coaxial cable and a matching network is installed in front of the electrode-row pair to maximize power flow into the electrode-row pair. This results in very evenly distributed voltages which results in even heating. A balanced-to-unbalanced transformer (balun) is installed at the input to the matching network to prevent the deposition of RF energy outside the target volume and creation of voltages that could be hazardous to personnel. The electrodes are perforated and connected to collection tubes which collect volatilized contaminant vapors and pass the vapors to a vapor treatment unit for neutralization.

摘要翻译： 从土壤体积中提取污染物的原位方法包括施加射频（RF）激发信号以用电极阵列加热土壤。 电极被插入到污染的体积中或插入钻孔体积中的孔的矩阵中。 第一排电极电耦合到同轴电缆的屏蔽，第二行电耦合到同轴电缆的中心导体。 RF能量通过同轴电缆施加到电极对对，并且匹配网络安装在电极列对的前面，以最大限度地增加流入电极列对的功率。 这导致非常均匀的分布电压，这导致均匀的加热。 平衡不平衡变压器（平衡 - 不平衡转换器）安装在匹配网络的输入端，以防止射频能量沉积在目标体积之外，并产生可能对人员造成危害的电压。 电极被穿孔并连接到收集挥发性污染物蒸汽并将蒸气传递到蒸气处理单元进行中和的收集管中。