PURIFICATION METHOD OF CONTAMINATED GROUND

• Main Author: YAMAMOTO SUMIO
• Format: Patent
• Language: English; Japanese
• Published: 19.04.2018
• Subjects: CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; DISPOSAL OF SOLID WASTE; FIRE-FIGHTING; HUMAN NECESSITIES; LIFE-SAVING; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINATED SOIL; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a purification method of a contaminated ground capable of accelerating evaporation of a contaminant by setting a temperature of a steam to be injected to the ground at relatively high temperature and capable of purifying the contaminant, which has been evaporated with the high-temperature steam, effectively with ozone.SOLUTION: The method involves a steam injection step where a high-temperature steam is supplied to a drilling pipe 3 inserted in a ground, followed by injecting the steam to the ground via a perforation provided in the drilling pipe 3. The method also involves an ozone-containing gas injection step where an ozone-containing gas containing ozone as a composition gas is supplied to a plurality of drilling pipes 5 inserted in the ground at a position apart from the drilling pipe 3 and also surrounding the drilling pipe 3, followed by injecting the ozone-containing gas to the ground via perforations provided in the drilling pipes 5. The ozone-containing gas injection step is performed while performing the steam injection step.SELECTED DRAWING: Figure 2 【課題】地中に注入する水蒸気の温度を、ある程度、高温に設定して汚染物質の気化を促進することができるとともに、高温の水蒸気で気化された汚染物質をオゾンにより効果的に浄化することができる汚染地盤の浄化方法を提供すること。【解決手段】地中に貫入された試錐管３に高温の水蒸気を供給し、試錐管３に穿設された貫通孔を介して水蒸気を地中に注入する水蒸気注入工程を備える。試錐管３から離間した位置で、かつ、試錐管３を囲繞するように地中に貫入された複数の試錐管５に、組成ガスとしてオゾンを含むオゾン含有ガスを供給し、試錐管５に穿設された貫通孔を介して地中にオゾン含有ガスを注入するオゾン含有ガス注入工程を備える。水蒸気注入工程を実施しながらオゾン含有ガス注入工程を実施する。【選択図】図２