In-situ medicine injection system and method

Abstract

The invention discloses an in-situ medicine injection system and a method. The in-situ medicine injection system comprises a compressed air storage tank, a repairing medicine storage tank, an injection regulating valve, an injection pipe, an upper sealing device, and a lower sealing device. In medicine injection process, before injection of a repairing medicine, compressed air is injected firstly,pressure expansion technology is adopted to increase water containing medium porosity and form relatively uniform preferential migration passages, and then the repairing medicine is injected for medicine homogeneous high efficiency transmission. The in-situ medicine injection system and the method are capable of realizing repairing medicine homogeneous high efficiency transmission, repairing medicine full utilization is ensured, and at the same time, injection equipment energy consumption is low, technology is simple, operation is flexible, based on the above steps, segmented injection is carried out from top to bottom, in-situ medicine injection efficiency is increased effectively, and repairing efficiency is increased.

Description

technical field [0001] The invention relates to the field of soil and groundwater pollution restoration, in particular to an in-situ medicament injection system and method. Background technique [0002] The in-situ injection technology uses chemical agents to inject remediation agents into the underground polluted area of ​​the polluted site under the synergy of power equipment, pipeline systems and injection well systems, and produces pollution through a series of geochemical reactions between chemical agents and pollutants The degradation, reduction, solidification, and biological decomposition of pollutants can reduce the underground concentration load of pollutants, and reduce the human health risks and ecological environment risks caused by pollutants through evaporation, volatilization, and groundwater flow conduction. [0003] The core and key to the efficient remediation of this technology lies in the directional and precise injection and homogeneous and efficient tr...

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Problems solved by technology

[0003] The core and key to the efficient remediation of this technology lies in the directional and precise injection and homogeneous and efficient transmission of remediation agents in soil and groundwater. However, the homogeneous and efficient transport of agents is often affected by the high heterogeneity of the aquifer medium, so that the repair agent cannot be evenly dispersed in the area to be repaired, and even the repair agent is under injection pressure. vertical backflow or cross-flow between formations in the preferential channel formed below, which will cause the failure of in-situ agent injection

In the prior art, there is a device that can realize fixed-point and quantitative release of repair agents in soil layers of any depth to avoid the problem of uneven distribution of agents caused by different permeability coefficients of soil layers, but it requires the use of water stop sections and sand filling It can only be realized by alternating multiple layers of segments, and the operation is relatively cumbersome, and the application of this method in the in-situ injection repair technology of groundwater is limited

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