A large-diameter chemical injection well and its organic-contaminated groundwater in-situ repair equipment and technology
An in-situ remediation and groundwater technology, which is applied in the restoration of polluted soil, separation methods, dispersed particle separation, etc., and can solve the problems of limited injection and remediation efficiency.
Active Publication Date: 2021-09-10
HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD
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[0007] In view of the fact that small-caliber agent injection wells are generally used at present, and the injection of agents is carried out by pressurized injection with a pneumatic diaphragm pump. This method of injection and repair efficiency is very limited, so there is an urgent need to develop a new structure of agent injection wells in this field
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[0084] Taking the in-situ remediation of groundwater contaminated by organic matter in a certain place in the south as an example, the aquifer in the water-rich area of the site is relatively thick, with an average of 12m, the groundwater permeability is good, the average permeability coefficient is 12m / d, and the maximum water output of a single well reaches 700m 3 , the thickness of the aquifer in the medium water-rich area is generally 6m, the average permeability coefficient is 6m / d, and the maximum water output of a single well reaches 110m 3 . According to the test results of the small test, the maximum influence radius of the in-situ injection agent is calculated to be 20m, and considering factors such as repair cost, construction period and repair effect, the diameter of the agent injection well is designed to be Φ=0.8m, and the pipe depth of the agent injection well is H =12m, the distance between the agent injection well and the vacuum extraction well is L=18m. Th...
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Abstract
The invention "a large-diameter chemical injection well and its in-situ restoration equipment and process for groundwater polluted by organic matter" belongs to the technical field of in-situ restoration of groundwater. The diameter of the large-diameter agent injection well is 500mm-1000mm. The in-situ remediation equipment of organic matter polluted groundwater includes: large-caliber chemical injection wells and chemical preparation and delivery devices; chemical preparation and delivery devices include chemical preparation tanks and chemical delivery pipelines; The medicament outlet of the medicament delivery pipeline can directly extend into the wellhead of the large-diameter medicament injection well. The invention adopts the medicine injection well with a large diameter, which can effectively increase the contact area between the injected medicine and polluted soil and groundwater, accelerate the medicine injection speed, and improve the restoration efficiency. At the same time, the extraction wells are arranged at a certain interval to further improve the restoration effect.
Description
technical field [0001] The invention belongs to the technical field of in-situ restoration of groundwater, and in particular relates to a large-diameter chemical injection well and an in-situ restoration equipment and process for groundwater polluted by organic matter. Background technique [0002] Current status of remediation technology for groundwater contaminated by organic matter at home and abroad: [0003] With the acceleration of the global industrialization process, there have been many sites contaminated by organic matter, and the soil and groundwater have been polluted to varying degrees. Since the 1980s, the United States, the Netherlands and other developed countries have carried out research and engineering practices related to the control and restoration of groundwater pollution sites, and accumulated a large number of research results and engineering experience for groundwater pollution control and restoration technologies. Common groundwater pollution contr...
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IPC IPC(8): B09C1/00B09C1/08B01D53/04
CPCB01D53/04B01D2253/102B01D2257/70B09C1/002B09C1/08B09C2101/00
Inventor 邹先军毛永强李晶冉启洋
Owner HUNAN HENGKAI ENVIRONMENT TECH INVESTMENT CO LTD