CN-116216901-B - Permeable reaction wall for composite mine pollution and wastewater treatment system

CN116216901BCN 116216901 BCN116216901 BCN 116216901BCN-116216901-B

Abstract

The application provides a permeable reactive barrier for composite mine pollution and a wastewater treatment system, wherein the permeable reactive barrier comprises a framework shell, a reverse filtering layer and alkaline filler, wherein the alkaline filler is positioned in the framework shell, the reverse filtering layer is positioned between the alkaline filler and the framework shell, the framework shell comprises a bidirectional geogrid, the reverse filtering layer comprises a geotechnical filter screen, the framework shell comprises a main body part and end parts positioned at two ends of the main body part, and openings are formed in the end parts. The permeable reaction wall containing the alkaline filler is arranged, so that the permeable reaction wall can neutralize acidic water generated by pollution in the mine, the pollution degree of the water in the mine is reduced, the cost is reduced, and the treatment effect of the polluted water is good.

Inventors

ZHANG ZONGJIAN
BU QINGGUO
ZHOU FENG
BAI DONGMING
ZHOU MENG

Assignees

中节能（北京）节能环保工程有限公司

Dates

Publication Date: 20260508
Application Date: 20230116

Claims (7)

1. The wastewater treatment system for the composite mine pollution is applied to a mine pollution area and is characterized by comprising a plurality of permeable reactive barriers and diversion trenches, wherein the permeable reactive barriers are arranged in the mine pollution area in a staggered manner, and the diversion trenches are connected with openings at the end parts of a framework shell; the permeable reactive barrier comprises a framework shell, a reverse filtering layer, an alkaline filler and an open pore water distribution pipe, wherein the alkaline filler is positioned in the framework shell, and the reverse filtering layer is positioned between the alkaline filler and the framework shell; the framework shell comprises a main body part and end parts positioned at two ends of the main body part, and an opening is arranged on the end parts; the open pore water distribution pipe is positioned in the alkaline filler, two ends of the open pore water distribution pipe are respectively communicated with openings at two ends of the framework shell, and a plurality of holes are formed in the side wall of the open pore water distribution pipe; The alkaline filler comprises household garbage incineration slag and carbon source particles, wherein the carbon source particles comprise corncob particles or corn particles, and the carbon source particles account for 5-10%.
2. A wastewater treatment system for composite mine pollution according to claim 1 and wherein said bi-directional geogrid is a polypropylene or polyethylene bi-directional geogrid.
3. The wastewater treatment system for composite mine pollution of claim 1, wherein the geotechnical filter is a polypropylene or polyethylene geotechnical filter.
4. The wastewater treatment system for complex mine pollution of claim 1, wherein the permeable reactive barrier has a diameter of 800-1500 mm.
5. The wastewater treatment system for composite mine pollution of claim 1, wherein a plurality of holes are staggered on the side wall of the open-pore water distribution pipe, and the distance between adjacent holes is 100-200 mm.
6. The wastewater treatment system for composite mine pollution of claim 1, wherein the particle size of the alkaline filler is 2-6 mm.
7. The wastewater treatment system for complex mine pollution of claim 1, wherein the cross section of the diversion trench is of a hexagonal structure, and crushed stone is filled in the diversion trench.

Description

Permeable reaction wall for composite mine pollution and wastewater treatment system Technical Field The application relates to the technical field of mine pollution treatment, in particular to a permeable reaction wall for composite mine pollution and a wastewater treatment system. Background Sulfide minerals represented by pyrite in mine waste are oxidized under the action of surrounding water and oxygen to form acidic mine wastewater which is strong in acidity and rich in heavy metals and sulfate. The acidic mine wastewater has extremely strong acidity, is rich in heavy metal ions and sulfate, and can cause serious pollution to soil and water environment around a mining area. The permeable reactive barrier (permeablereactivebarrier, PRB) is an in-situ repair technology for removing the pollution components in the underground water by physical, chemical, biological degradation and other methods by using a specific reaction medium, and the principle is that the pollution components in the pollution area of the mine are converted into an environment-acceptable form, so that the aim of treating the pollution of the underground water is fulfilled. The prior Permeable Reactive Barrier (PRB) for compounding mine pollution comprises continuous reactive band PRB, funnel guide gate PRB and conventional injection PRB, wherein the continuous reactive band PRB and the conventional injection PRB are high in cost and are arranged at the downstream, pollution is easily accumulated at the downstream to form secondary pollution, and acid groundwater has corrosion effect on the funnel wall in the using process of the funnel guide gate PRB, so that the using effect is poor. Disclosure of Invention In view of the above, the application aims to provide a permeable reactive barrier for composite mine pollution and a wastewater treatment system, so as to solve the problems of high cost and poor use effect of the conventional permeable reactive barrier for treating mine pollution. Based on the above object, the application provides a permeable reactive barrier for composite mine pollution, comprising an architecture shell, a reverse filtering layer and an alkaline filler, wherein the alkaline filler is positioned in the architecture shell, and the reverse filtering layer is positioned between the alkaline filler and the architecture shell; the framework shell comprises a main body part and end parts positioned at two ends of the main body part, wherein an opening is formed in the end parts. Further, the bidirectional geogrid is a polypropylene or polyethylene bidirectional geogrid. Further, the geotechnical filter screen is a polypropylene or polyethylene geotechnical filter screen. Furthermore, the permeable reactive barrier further comprises an open pore water distribution pipe positioned in the alkaline filler, two ends of the open pore water distribution pipe are respectively communicated with openings at two ends of the framework shell, and a plurality of holes are formed in the side wall of the open pore water distribution pipe. Further, the diameter of the permeable reactive barrier is 800-1500 mm. Further, the alkaline filler comprises household garbage incinerator slag and carbon source particles, the carbon source particles comprise corncob particles or corn particles, and the carbon source particles account for 5-10%. Further, the holes are staggered on the side wall of the perforated water distribution pipe, and the distance between every two adjacent holes is 100-200 mm. Further, the particle size of the alkaline filler is 2-6 mm. The application also provides a wastewater treatment system for composite mine pollution, which is applied to a mine pollution area, and comprises a plurality of permeable reaction walls and diversion trenches, wherein the permeable reaction walls are arranged in the mine pollution area in a staggered manner, and the diversion trenches are connected with the openings at the end parts of the framework shell. Further, the cross section of the diversion trench is of a hexagonal structure, and broken stone is filled in the diversion trench. From the above, it can be seen that the application provides a permeable reactive barrier and a wastewater treatment system for composite mine pollution, wherein the permeable reactive barrier comprises an alkaline filler, and a reverse filtering layer and a framework shell wrapping the alkaline filler, the alkaline filler can perform a neutralization effect with groundwater in a mine pollution area, so as to realize the treatment of groundwater in the mine pollution area, prevent the groundwater in the mine pollution area from polluting other pollution-free groundwater, the reverse filtering layer can supply water to pass through, but the alkaline filler and other impurities cannot pass through, the reverse filtering layer can play a certain protection effect on the alkaline filler, prevent the impurities from entering the alkaline filler, and further redu