Underground water pollution in-situ circulation remediation system based on bubble pulsation theory

Abstract

The invention relates to an underground water pollution in-situ circulation remediation system based on a bubble pulsation theory, and belongs to the technical field of underground water pollution control and remediation. Upper and lower sections of permeable sieve holes are distributed in the upper and lower parts of a circulating well casing, a gas injection pipe is mounted in the circulating well casing, and a perforated aeration head is mounted at the bottom of the gas injection pipe; a plurality of layers of airflow partition plates are installed in the circulating well casing, permeable sieve holes are distributed in the upper portions of the airflow partition plates, and the airflow partition plates are evenly installed between the gas injection pipe and the circulating well casing; and a tail gas recovery pipe and a medicament injection pipe are mounted in the circulating well casing. According to the invention, only one circulating well casing which does not need to be specially designed is used, gas or water does not need to be pumped and injected to provide power for underground water circulation, the underground water circulation is realized only through the bubble pulsation effect, and tail gas collection is directly realized by using the pressure in the well, so that volatile and semi-volatile organic pollutants in the underground water are effectively and quickly removed, the well structure and the technological process are simplified, the equipment maintenance probability is reduced, and the remediation cost is saved.

Description

technical field [0001] The invention relates to the technical field of groundwater pollution site control and restoration, in particular to an in-situ circulation restoration system for groundwater pollution based on the theory of bubble pulsation. Background technique [0002] In recent years, the rapid development of my country's economic construction and the upgrading and optimization of industrial structure have led to the relocation of a large number of heavily polluted areas of pesticide and chemical plants, and these leftover soil and groundwater contain a large number of volatile and semi-volatile organic pollutants. , such as benzene, nitrobenzene, toluene, chlorobenzene, tetrachloroethylene, etc. At the same time, most of these polluted sites have large pollution depths, complex stratigraphic structures, and many types of organic pollutants, and the surrounding areas are often close to towns, which can easily endanger the surrounding environment and human health. T...

AI Technical Summary

Problems solved by technology

In addition, the start-up conditions required for the cycle are relatively high, and the construction technicians need to master certain technical knowledge, such as the installation position of the gas-water separation device and the flow relationship between gas injection and gas extraction, otherwise it is easy to cause the cycle to fail. Or the groundwater flowing out of the circulation well is difficult to return to the circulation well, the circulation effect is difficult to guarantee, and there is a risk of expanding the scope of the pollution plume

The complex well structure and technological process greatly increase the probability of equipment maintenance, increase the risk and cost of remediation, and limit the application and promotion of this type of technology in the actual remediation of contaminated sites

Images