CN218058526U

CN218058526U - Permeable reactive barrier system capable of being dredged repeatedly

Info

Publication number: CN218058526U
Application number: CN202221019420.0U
Authority: CN
Inventors: 刘鹏; 王红艳; 刘欣
Original assignee: Zhongke Yuanhe Environmental Protection Technology Co ltd
Current assignee: Zhongke Yuanhe Environmental Protection Technology Co ltd
Priority date: 2021-10-25
Filing date: 2022-04-29
Publication date: 2022-12-16
Anticipated expiration: 2032-04-29
Also published as: CN114516666A

Abstract

The utility model discloses a permeable reactive wall system that can dredge repeatedly, shown system includes the wall body, a plurality of permeation tubes, store the chamber, a water pump, drinking-water hole and water level monitoring device, the wall body is filled by reaction medium and forms, it is located the wall body bottom or imbeds relative water barrier to store the chamber, a plurality of permeation tubes are vertical evenly arranged in the wall body, reaction medium is passed and the chamber is deposited to stretching into to the one end of every permeation tube, its other end is located above ground, the vertical reaction medium that passes in drinking-water hole switches on with storing the chamber, water level monitoring device sets up in the wall body, a water level is monitored for the groundwater level. The utility model discloses when the reaction wall blocks up, the accessible is gone into the flush fluid toward the infiltration pipe high-pressure pump and is washed away the plug and can react the wall in order to the mediation, can effectually alleviate the reaction and deposit the jam problem that leads to, and the waste liquid that washes after the mediation collects and is storing the chamber, will wash the waste liquid with the help of large-traffic water pump through the drinking-water hole and take out, prevents that the waste liquid from polluting low reaches groundwater.

Description

Permeable reactive barrier system capable of being dredged repeatedly

Technical Field

The utility model relates to a pollute groundwater restoration technical field, concretely relates to infiltration reaction wall system that can dredge repeatedly.

Background

With the development of mining, smelting and manufacturing industries, the heavy metal pollution of surrounding water bodies is increasingly serious, the safety of local ecological environment is threatened, and the pollution remediation of underground water becomes an important part of the current ecological environment protection. The groundwater pollution remediation technology can be divided into in-situ remediation and ex-situ remediation technologies according to remediation positions, and the in-situ remediation technology has the advantages of low cost, small environmental interference and the like and is widely researched and applied. Permeable reactive barrier remediation technology is one of the most representative in-situ remediation technologies, and currently more than 400 permeable reactive barriers are installed to remediate various contaminated groundwater globally.

Based on practical experience, the phenomenon that the groundwater remediation efficiency is reduced due to wall blockage is often caused by the conventional permeable reactive barrier along with the time and reaction. The general treatment method is to modify and optimize the wall filling material, such as the mixed filling of a polymetallic material or zero-valent iron and activated carbon, or directly treat the wall filling material by replacing the filling material. However, these methods significantly increase the construction costs and still do not ensure long-term use of the wall.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a permeable reactive wall system that can dredge repeatedly to solve groundwater permeable reactive wall and take place the problem of jam easily in the use.

The utility model adopts the following technical scheme:

the utility model provides a permeable reactive barrier system that can dredge repeatedly, includes the wall body, a plurality of permeability tubes, stores chamber, water pump, pumping hole and water level monitoring device, the wall body is formed by reaction medium packing, and it is arranged in and treats to restore the groundwater contaminated water aquifer, it is located to store the chamber wall body bottom or the relative water barrier of embedding, and is a plurality of the vertical uniform arrangement of permeability tube is in the wall body, every the one end of permeability tube is passed reaction medium stretches into the chamber of storing, and its other end is located more than the ground, the vertical passing in pumping hole reaction medium with it switches on to store the chamber, the water pump sets up store the intracavity and with pumping hole position phase-match, water level monitoring device sets up in the wall body for monitoring ground water level.

The reaction medium is one or more of zero-valent iron, sponge iron, zeolite, medical stone, biochar and activated carbon.

Preferably, the reaction medium is a mixture of sponge iron and medical stone, wherein the mass ratio of the sponge iron to the medical stone is 3:7.

the permeable pipe is a corrosion-resistant pipe, the diameter of the permeable pipe is 30-50 mm, a plurality of small holes are uniformly distributed on the pipe wall of each permeable pipe from top to bottom, and the aperture of each small hole is 2-5 mm.

The water pumping hole is a circular or directional pipe structure made of corrosion-resistant materials, and the aperture of the water pumping hole is larger than the overall dimension of the water pump.

The pumping hole is positioned at the inner downstream of the wall body.

The water level monitoring device comprises water level sensors, signal transmitters and a power supply device for supplying electric energy to the water level sensors and the signal transmitters, wherein the number of the water level sensors is at least two, the two water level sensors are respectively arranged at the upstream and the downstream in the wall body and used for monitoring the upstream and downstream underground water levels in the wall body, and the signal transmitters are electrically connected with the water level sensors and used for sending water level monitoring data to managers.

The power supply device is a solar power supply device.

The storage cavity is embedded with a relative water-resisting layer of 10-30 cm.

The utility model discloses technical scheme has following advantage:

A. the utility model discloses infiltration reaction wall system that can dredge repeatedly, simple structure is provided with a plurality of permeability tubes in the reaction wall, and when the reaction wall blockked up, the accessible was gone into the flush fluid toward the permeability tube high-pressure pump and is washed away the plug and can react the wall in order to dredge, can effectually alleviate the jam problem that the reaction sediment leads to, and the waste liquid that washes after the mediation collects and is storing the chamber, will wash the waste liquid with the help of large-traffic water pump through the hole of drawing water and take out, prevents that the waste liquid from polluting low reaches groundwater.

B. The utility model discloses infiltration reaction wall system that can dredge repeatedly can regularly send water level monitoring data to managers through hydrological sensor and signal transmitter, when the water level of current is less than the upper reaches water level, dredges the infiltration reaction wall as required, prevents that the reaction wall from influencing the groundwater restoration because of being blockked up for a long time, improves the work efficiency of reaction wall.

C. The utility model discloses the infiltration reaction wall system that can dredge repeatedly, the mediation flow is very simple, convenient, need not to carry on large-scale filler replacement engineering.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic sectional view of a permeable reactive barrier system capable of being dredged repeatedly according to the present invention;

FIG. 2 is a schematic perspective view of the permeable reactive barrier system capable of being dredged repeatedly according to the present invention;

fig. 3 is the utility model discloses the permeable reactive barrier system mediation process schematic diagram that can dredge repeatedly.

The labels in the figure are as follows:

1-a wall body; 2-a reaction medium; 3-a permeation tube; 4-a storage chamber; 5, a water pump; 6-water pumping holes; 7-a water level sensor; 8-a signal transmitter; 9-solar power supply device.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-fig. 2, the utility model provides a permeable reactive barrier system that can dredge repeatedly, including wall body 1, a plurality of permeability tube 3, storage chamber 4, large-traffic water pump 5, draw water hole 6 and water level monitoring device, wall body 1 is filled by reaction medium 2 and is formed, and it is arranged in and is waited to restore underground polluted water aquifer, stores chamber 4 and is located wall body 1 bottom or imbeds relative water barrier, and when embedding relative water barrier, stores chamber 4 and should imbed relative water barrier 10 ~ 30cm. The relative water barrier is a relatively impermeable geotechnical layer which separates groundwater, and generally has a small permeability coefficient and corresponds to a relative aquifer. A plurality of infiltration pipes 3 are vertically evenly arranged in wall body 1, one end of each infiltration pipe 3 passes through reaction medium 2 and stretches into and deposit chamber 4, and the other end is located above ground for the mediation of infiltration reaction wall, and the hole 6 that draws water vertically passes reaction medium 2 and switches on with storage chamber 4, and water pump 5 sets up in storage chamber 4 and with the hole 6 position phase-match that draws water, and water level monitoring device sets up in wall body 1 for monitor ground water level. The utility model discloses be provided with a plurality of permeation tubes in the reaction wall, when the reaction wall blockked up, the accessible was gone into the flush fluid toward permeation tube high pressure pump and is washd the plug and in order to dredge reactable wall, can effectually alleviate the jam problem that the reaction sediment leads to, and the waste liquid that washes after the mediation collects and is storing the chamber, will wash the waste liquid with the help of large-traffic water pump through the suction hole and take out, prevents that the waste liquid from polluting low reaches groundwater.

Further, the reaction medium 2 is determined according to different target pollutants, and may be one or more of zero-valent iron, sponge iron, zeolite, medical stone, biochar and activated carbon, preferably a mixture of sponge iron and medical stone, wherein the mass ratio of sponge iron to medical stone is 3:7. the permeation tube 3 is a corrosion-resistant tube material, such as a PE tube, a stainless steel tube and the like, the diameter of the permeation tube 3 is 30-50 mm, a plurality of small holes are uniformly distributed on the tube wall of each permeation tube 3 from top to bottom, and the aperture of each small hole is 2-5 mm. The permeate tube 3 can simultaneously serve as a late sampling monitoring port. The water pumping holes 6 are circular or directional pipe structures made of corrosion-resistant materials and located in the inner downstream of the wall body 1, and the aperture of each water pumping hole 6 is larger than the overall dimension of the water pump 5. The suction opening 6 is a passage for inserting and removing the pump, from which the rinsing waste water in the storage chamber 4 can be extracted.

The water level monitoring device comprises a water level sensor 7, a signal transmitter 8 and a power supply device for supplying electric energy to the water level sensor 7 and the signal transmitter 8, wherein the water level sensor 7 is at least two, the upstream and the downstream are respectively arranged in the wall body 1 and used for monitoring the upstream and downstream underground water levels in the wall body 1, and the signal transmitter 8 is electrically connected with the water level sensor 7 and used for sending water level monitoring data to managers. The utility model discloses well power supply unit is solar power unit 9. The utility model discloses can regularly send water level monitoring data to managers through hydrological sensor and signal transmitter, when the water level of following is less than the upper reaches water level, dredge permeable reactive wall as required, prevent that the reactive wall from influencing the groundwater restoration because of being blockked up for a long time, improve the work efficiency of reactive wall.

The utility model discloses the application method of the infiltration reaction wall system that can dredge repeatedly, including following step:

s1, excavating to about 50cm below the bottom of an aquifer according to characteristics of the aquifer of underground polluted water to be repaired, namely embedding a relative water-resisting layer to form a pit body, then sequentially installing a storage cavity 4, a permeation tube 3, a water pumping hole 6, a water level monitoring device and a water pump 5 in the pit body, and filling a reaction medium 2 in the pit body to form a wall body 1;

s2, monitoring underground water level information of upstream and downstream in the permeable reactive wall in real time through a water level sensor 7, regularly sending water level data to a manager through a signal emitter 8, and dredging the permeable reactive wall when the downstream water level is lower than the upstream water level;

s3, when dredging is needed, as shown in the figure 3, a manager connects an external high-pressure water gun with the upper end of the permeation tube 3, pumps flushing liquid into the permeation tube through high pressure to flush the blockage so as to dredge the permeable reactive barrier, and guides flushing waste liquid into the storage cavity 4; the used flushing liquid is one of clear water, EDTA and dilute hydrochloric acid solution, preferably clear water;

and S4, starting the water pump 5, and pumping the flushing waste liquid in the storage cavity 4 out of the water pumping hole 6.

The utility model discloses the infiltration reaction wall system that can dredge repeatedly, the mediation flow is very simple, convenient, need not to carry out large-scale filler replacement engineering.

The utility model discloses do not state the part and be applicable to prior art.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a permeable reactive barrier system that can dredge repeatedly, includes wall body (1), wall body (1) is formed by reaction medium (2) packing, and it is arranged in and is waited to restore underground contaminated water aquifer, its characterized in that, the reactive barrier system still includes a plurality of permeability tubes (3), storage chamber (4), water pump (5), pumping hole (6) and water level monitoring device, it is located to store chamber (4) wall body (1) bottom or the relative water barrier of embedding, a plurality of permeability tube (3) vertical evenly arranged in wall body (1), every the one end of permeability tube (3) is passed reaction medium (2) and stretch into storage chamber (4), its other end is located above ground, pumping hole (6) vertical pass reaction medium (2) and with store chamber (4) and switch on, water pump (5) set up store in chamber (4) and with pumping hole (6) position phase-match, water level monitoring device sets up in wall body (1) for monitoring groundwater level.

2. The permeable reactive barrier system of claim 1, wherein the reactive medium (2) is one of zero-valent iron, sponge iron, zeolite, medical stone, biochar, and activated carbon.

3. The permeable reactive barrier system capable of being dredged repeatedly as claimed in claim 1, wherein the permeable pipe (3) is a corrosion-resistant pipe, the diameter of the permeable pipe (3) is 30-50 mm, a plurality of small holes are uniformly distributed on the pipe wall of each permeable pipe (3) from top to bottom, and the diameter of each small hole is 2-5 mm.

4. The permeable reactive barrier system capable of being dredged repeatedly according to claim 1, wherein the water pumping holes (6) are circular or directional pipes made of corrosion-resistant materials, and the diameter of the water pumping holes (6) is larger than the external dimension of the water pump (5).

5. A repeatedly openable permeable reactive wall system according to claim 4, wherein the pumping holes (6) are located downstream in the wall (1).

6. The permeable reactive barrier system capable of being dredged repeatedly according to claim 1, wherein the water level monitoring device comprises a water level sensor (7), a signal emitter (8) and a power supply device for supplying power to the water level sensor (7) and the signal emitter (8), the number of the water level sensors (7) is at least two, the water level sensors are respectively arranged at the upstream and the downstream in the wall body (1) and are used for monitoring the underground water level at the upstream and the downstream in the wall body (1), and the signal emitter (8) is electrically connected with the water level sensor (7) and is used for sending water level monitoring data to managers.

7. The recanalizable osmotic reaction wall system of claim 6, wherein the power supply is a solar power supply (9).

8. The permeable reactive wall system of claim 1, wherein the storage chamber (4) is embedded in a relative water barrier layer of 10-30 cm.