Box-type baffling permeable reactive barrier technology

Abstract

The invention relates to a box-type baffling permeable reactive barrier technology, which is characterized by comprising the following concrete steps of: pre-filling media into cuboid medium boxes; and dividing a permeable reactive barrier into 2-6 serially connected reaction chambers through the arrangement of the medium boxes, so that water flow passes through a PRB (Permeable Reactive Barriers) reactor in a up-and-down baffling flow state, and pollutants in water can be removed. The box-type baffling permeable reactive barrier technology has the advantages of convenience in filling, regenerating and replacing the reaction media, high mass transfer efficiency and the like; in-situ remediation can be carried out on ground water economically and high-efficiently; and since the media are filled in the medium boxes, the phenomenon of surface collapse cannot be caused even though the mechanical strength of the reaction media is reduced after long-time operation.

Description

technical field [0001] The invention relates to a box-type baffle osmotic reaction grid technology, which belongs to the technical field of groundwater in-situ restoration. Background technique [0002] As an important part of water resources, groundwater is the main source of drinking water and raw materials for industrial and agricultural production, and plays an important role in the development of my country's national economy and society. With the development of society and economy and the improvement of people's living standards, the requirements for groundwater resources are also getting higher and higher. According to the survey, the problem of groundwater pollution in our country is very serious. In addition to the natural and inferior groundwater, nearly 25% of the groundwater in the plains of the country has been polluted to varying degrees. Common pollutants in groundwater include "three nitrogens", heavy metals (mercury, cadmium, lead, chromium, etc.) It will ...

AI Technical Summary

Problems solved by technology

The PRB technology has the following determinations in the operation process: (1) For groundwater with multiple pollutants, it is often necessary to use a PRB compounded with multiple media, which will bring great trouble to the addition of different media during the construction process; (2) After the PRB has been running for a period of time, the phenomenon of medium adsorption saturation, deactivation or clogging will occur. At this time, the reaction medium buried in the ground needs to be dug out for regeneration / replacement. Big inconvenience; (3) After a certain reaction medium has been running for a period of time, due to the change of its own properties, its mechanical strength is reduced, resulting in ground subsidence; (4) The water flow direction of the existing PRB technology is lateral flow, if it is necessary to increase pollutants The contact time with the reaction medium can only be achieved by widening the thickness of the reaction medium, resulting in increased infrastructure costs

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