CN107938752B - Safety water taking well - Google Patents
Safety water taking well Download PDFInfo
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- CN107938752B CN107938752B CN201711239614.5A CN201711239614A CN107938752B CN 107938752 B CN107938752 B CN 107938752B CN 201711239614 A CN201711239614 A CN 201711239614A CN 107938752 B CN107938752 B CN 107938752B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/10—Obtaining and confining water by means of wells by means of pit wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/16—Component parts of wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/16—Component parts of wells
- E03B3/18—Well filters
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/16—Component parts of wells
- E03B3/18—Well filters
- E03B3/24—Well filters formed of loose materials, e.g. gravel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a safe water taking well which comprises an annular permeable reactive barrier, wherein the wall surface of the permeable reactive barrier is parallel to the vertical direction and is surrounded to form a well chamber for water taking. The safe water taking well provided by the invention adopts the permeable reactive barrier to treat the underground water, but abandons the conventional mode of crossing the permeable reactive barrier across the underground water area, and the permeable reactive barrier is arranged around the well chamber to meet the purification requirement of the underground water in the well chamber, so that the water flowing into the water taking well meets the safety requirement of domestic water of residents.
Description
Technical Field
The invention relates to a safe water taking well, in particular to a safe water taking well suitable for underground water non-point source pollution, which can solve the problem of water safety of an underground water polluted area at a lower cost and is particularly suitable for popularization and application in rural remote areas.
Background
With the development of economic society, the environmental problem of underground water gradually develops from point source pollution to non-point source pollution and expands from cities to rural areas. Especially, in the agricultural planting process, a large amount of fertilizers, organic fertilizers, pollutants discharged by industrial production, pollutants generated by mining activities in mining areas and the like permeate underground water for a long time, so that the quality of the underground water is polluted, the ecological environment and the safety of domestic water are threatened, and the water safety and the body health of people are seriously influenced.
Common in-situ groundwater remediation technologies include in-situ chemical oxidation and reduction, ex-situ groundwater extraction treatment, in-situ microbial degradation, in-situ aeration, in-situ permeable reactive barrier, and the like. The permeable reactive barrier technology has the advantages of simple operation, good treatment effect and the like, and is concerned in recent years. Permeable reactive wall technology typically places a barrier wall across the contaminated groundwater where the adsorbent or redox material is mixed with sand to provide a suitable permeability for the reaction process for the oxidation-reduction of the contaminants to reduce the concentration of certain contaminants in the water to a desired level.
Although the repair technologies can repair polluted underground water well, when the repair technologies are used for underground water non-point source pollution, a large amount of repair funds are needed, and the repair technologies are difficult to popularize and apply in a short time in rural remote areas.
Disclosure of Invention
The embodiment of the invention relates to a safe water taking well which can at least solve part of defects in the prior art.
The embodiment of the invention relates to a safe water taking well which comprises an annular permeable reactive barrier, wherein the wall surface of the permeable reactive barrier is parallel to the vertical direction and is surrounded to form a well chamber for taking water.
In one embodiment, the permeable reactive barrier comprises an upper impermeable wall and a lower drainage wall, at least the lower drainage wall is a cavity wall, and the cavity wall is filled with a reactive filler.
As one embodiment, the safe water extraction well further comprises an annular supporting well shaft, the supporting well shaft is coaxially arranged in the well chamber, and the supporting well shaft is provided with a water passage for guiding the permeating water permeating through the permeable reactive wall to the cavity of the supporting well shaft.
As one embodiment, the supporting shaft comprises an outer well sleeve and an inner well sleeve which are coaxially arranged, and a filtering mechanism is arranged between the outer well sleeve and the inner well sleeve.
As one embodiment, an annular water filtering chamber is formed between the outer well casing and the inner well casing in an enclosing mode, and the filtering mechanism comprises quartz sand filled in the water filtering chamber.
In one embodiment, the support shaft comprises an upper water-impermeable cylinder and a screen-type lower water-filtering cylinder, and the lower water-filtering cylinder forms the water passage.
As one embodiment, the bottom end of the upper-layer waterproof cylinder body is positioned below a groundwater intake level.
As one embodiment, the safe water taking well further comprises an annular supporting well wall, the supporting well wall is coaxially sleeved outside the permeable reactive wall, and the supporting well wall is provided with a water permeable channel for guiding the underground water around the supporting well wall to the side of the permeable reactive wall.
As one embodiment, the safe water taking well further comprises an annular water stopping wall, the water stopping wall is arranged in a surrounding mode to form a water taking area, the permeable reactive wall is arranged in the water taking area, and the water stopping wall is provided with a water diversion channel for guiding surrounding underground water into the water taking area.
As one embodiment, the permeable reactive barrier comprises a plurality of annular reactive barriers coaxially sleeved in sequence from the inside of the well chamber to the outside of the well chamber along the horizontal direction, and each reactive barrier has a cavity and is filled with reactive filler.
The embodiment of the invention at least has the following beneficial effects: the safe water taking well provided by the invention adopts the permeable reactive barrier to treat the underground water, but abandons the conventional mode of crossing the permeable reactive barrier across the underground water area, and the permeable reactive barrier is arranged around the well chamber to meet the purification requirement of the underground water in the well chamber, so that the water flowing into the water taking well meets the safety requirement of domestic water of residents.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a vertical cross-sectional structure of a safe water intake well provided by an embodiment of the invention;
fig. 2 is a schematic view of a horizontal cross-sectional structure of the safety water intake well according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, the embodiment of the invention provides a safe water taking well, which comprises an annular permeable reactive wall 1, wherein the wall surface of the permeable reactive wall 1 is parallel to the vertical direction and encloses a well chamber for taking water.
The safe water taking well provided by the embodiment adopts the permeable reactive barrier 1 to treat the underground water, but abandons the conventional mode that the permeable reactive barrier 1 crosses the underground water area, and the permeable reactive barrier 1 is arranged around the well room to meet the purification requirement of the underground water in the well room, so that the water flowing into the water taking well meets the safety requirement of domestic water of residents.
It is easy to understand that the bottom of the well chamber is a watertight structure or a well bottom with a water restoration function, such as a permeable reactive wall 1 constructed by cement or having a horizontal wall surface, to prevent the contaminated groundwater from penetrating into the bottom of the water intake well.
Further preferably, the permeable reactive barrier 1 comprises an upper impermeable wall and a lower drainage wall, at least the lower drainage wall is a cavity wall, and the cavity wall is filled with a reaction filler. The bottom end of the waterproof wall is preferably located below the groundwater level line of the water intake place, or is preferably located below the lowest groundwater level line of the water intake place, and the bottom end of the waterproof wall can be adjusted according to actual conditions, and in the embodiment, the bottom end of the waterproof wall is preferably located 0.5m below the lowest groundwater level line of the water intake place. By dividing the permeable reactive barrier 1 into an upper impermeable wall body and a lower water filtering wall body, the upper impermeable wall body can enhance the structural strength of the permeable reactive barrier 1, and on the other hand, can prevent upper soil particles from permeating into the wall body and a well chamber, thereby improving the cleanliness of well water in the water taking well. The water filtering wall body is preferably a sieve tube type annular wall body, namely, a plurality of sieve holes/sieve slits are formed in the hollow part, and the width/aperture of the sieve slits are adjusted according to the soil particle size of the aquifer, so that underground water can pass through the water filtering wall body and soil particles can be intercepted. The permeable reactive barrier 1 is wrapped with reactive filler, and when the active material in the filler layer fails, the permeable reactive barrier 1 can be lifted vertically to replace the reactive filler therein.
In this embodiment, it is preferable that the water-impermeable wall and the drainage wall are both hollow walls, and the reactive filler in the upper water-impermeable wall can move downward at any time to supplement the shortage of the lower drainage wall caused by the loss or inactivation of the reactive filler. The reaction filler is used for carrying out chemical reaction or physical adsorption with heavy metals and organic pollutants in underground water so as to reduce/eliminate the concentration of the pollutants in the underground water; the reaction filler is one or more of granular materials such as zero-valent iron, silicon dioxide, activated carbon, zeolite, apatite, slag/volcanic rock slag, steel slag/organic clay, carbon sources, microbial carriers and the like, can adapt to treatment of different pollution sources, and can achieve a better groundwater remediation and filtration effect.
Continuing the structure of the above-mentioned safety water extraction well, as shown in fig. 1 and fig. 2, the safety water extraction well further comprises an annular support shaft 2, the support shaft 2 is coaxially arranged in the well chamber, and the support shaft 2 has a water passage for guiding the permeated water permeating through the permeable reactive wall 1 to the cylinder cavity. It is easy to understand that the supporting shaft 2 is arranged coaxially with the annular permeable reactive wall 1/well chamber, i.e. its axial direction is vertical, i.e. the wall of the supporting shaft 2 is parallel to the vertical. The barrel cavity (i.e. the inner cavity formed by enclosing) of the supporting shaft 2 is a well cavity 5 for supplying and taking water; it is preferably abutted against the inner wall surface of the permeable reactive barrier 1, i.e. the shape and size of the outer wall of the supporting shaft 2 are substantially the same as the shape and size of the inner wall surface of the permeable reactive barrier 1. In general, the permeable reactive barrier 1 and the supporting shaft 2 are formed in a regular cylindrical or rectangular parallelepiped shape, and are coaxially disposed. The support shaft 2 is arranged to effectively improve the support strength of the water taking well provided by the embodiment, and well collapse caused by replacement of the permeable reactive barrier 1 is avoided. The material of the supporting shaft 2 can be PVC or stainless steel, so that the strength of the shaft can be ensured, and toxic and harmful substances cannot be separated out after long-term soaking.
Also preferably, the above-mentioned support shaft 2 comprises an upper water-impermeable cylinder and a lower water-filtering cylinder of a screen pipe type, and the lower water-filtering cylinder forms the water passage. The bottom end of the water-tight cylinder is preferably located below the groundwater level line of the water intake place, or is preferably located below the lowest groundwater level line of the water intake place, and can be adjusted according to the actual situation, and in the embodiment, the bottom end is preferably located 0.5m below the lowest groundwater level line of the water intake place. The structure of the screen pipe type water filtering cylinder body can refer to the structure of the lower layer water filtering wall body, and the structure is omitted from this point. The upper and lower ends of the supporting shaft 2 are preferably flush with the upper and lower ends of the permeable reactive wall 1, and the lower end of the water-impermeable cylinder is preferably flush with the lower end of the water-impermeable wall, so as to ensure a smooth water flow channel.
Further preferably, as shown in fig. 1 and 2, the supporting wellbore 2 comprises an outer well casing 22 and an inner well casing 21 which are coaxially arranged, and a filtering mechanism 23 is arranged between the outer well casing 22 and the inner well casing 21. For the structure that the supporting shaft 2 is divided into an upper impermeable cylinder and a lower water filtering cylinder, the outer well casing 22 and the inner well casing 21 are correspondingly arranged, namely, the supporting shaft is divided into an upper impermeable well casing and a lower water filtering well casing. The permeated water treated by the permeable reactive barrier 1 is further filtered by the filtering mechanism 23, thereby further improving the cleanliness of the water in the well 5; mainly, the filtering means 23 is for filtering suspended substances in the groundwater, such as soil particles penetrating the permeable reactive walls 1. In this embodiment, an annular water filtering chamber is defined between the outer well casing 22 and the inner well casing 21, the filtering mechanism 23 includes quartz sand filled in the water filtering chamber, and the particle size of the quartz sand is mainly determined according to the particle size of aquifer soil of a water-taking place; the groundwater treated by the quartz sand layer can reach the standard of domestic water of residents, and the water safety is ensured. Of course, the filter mechanism 23 is not limited to the quartz sand layer, and other filter materials such as activated carbon may be used. The outer casing 22 and the inner casing 21 are preferably assembled as a unitary structure, and the integral support well 2 is preferably removably mounted in a well bore, such as: can set up annular socket slot or a plurality of socket holes of annular arrangement at the closed shaft bottom (like the cement shaft bottom) of building by laying bricks or stones in the bottom of well room, correspond and set up a plurality of projections that annular lug or annular were arranged in the bottom of this support pit shaft 2, inlay through annular lug and insert in annular socket slot, or each projection one-to-one inlays and inserts in each socket hole, realize this support pit shaft 2 can dismantle the fixing in the bottom of well room, its top accessible components such as bolt can dismantle with ground and be connected, thereby realize this demountable installation who supports pit shaft 2, be convenient for change/wash the filter material wherein.
Continuing the structure of the above-mentioned safety water intaking well, as shown in fig. 1 and fig. 2, the safety water intaking well further comprises an annular supporting well wall 3, the supporting well wall 3 is coaxially sleeved outside the permeable reactive wall 1, and the supporting well wall 3 is provided with a water permeable channel for guiding the underground water around the supporting well wall to the permeable reactive wall 1 side. It will be readily understood that the supporting walls 3 are arranged coaxially with the permeable reactive walls 1 in the form of rings, i.e. their axial direction is vertical, i.e. the walls of the supporting walls 3 are parallel to the vertical. The supporting shaft 3 is preferably abutted against the outer wall of the permeable reactive barrier 1, i.e. the shape and size of the inner wall of the supporting shaft 3 are substantially the same as the shape and size of the outer wall of the permeable reactive barrier 1. In general, the permeable reactive barrier 1 and the supporting walls 3 are in the shape of regular cylinder or rectangular parallelepiped, and they are arranged coaxially. The support intensity of the water intaking well that this embodiment provided can effectively be improved through setting up the support wall of a well 3, causes the well collapse when avoiding changing permeable reactive barrier 1. The material of the supporting well wall 3 can be PVC or stainless steel, so that the strength of the supporting well wall 3 can be ensured, and toxic and harmful substances can not be separated out after long-term soaking.
Preferably, the permeable reactive barrier 1 is supported inside and outside by the supporting shaft 2 and the supporting shaft wall 3, so as to effectively improve the structural strength of the water intake well provided by the embodiment, ensure that the permeable reactive barrier 1 is replaceable, and avoid collapse when the permeable reactive barrier 1 is replaced.
The structure of the safe water taking well is connected as shown in figures 1 and 2, the safe water taking well further comprises an annular water stopping wall 4, the water stopping wall 4 is arranged to form a water taking area in an enclosing mode, the permeable reactive wall 1 is arranged in the water taking area, and the water stopping wall 4 is provided with a water diversion channel for guiding underground water around the water stopping wall into the water taking area. The water stop wall 4 can play a role in stopping the horizontal flow of underground water, and prevent the underground water from continuously flushing the permeable reactive barrier 1, thereby prolonging the effective action time of active substances in the permeable reactive barrier 1. This stagnant water wall 4 keeps apart a relative scope area of intaking to separate this area of intaking and outlying soil and groundwater environment, external groundwater flows and can not arouse the groundwater in this area of intaking to flow hardly, and only when making water intake well water level reduce because of activities such as artificial water intaking, external groundwater just can flow to the area of intaking through above-mentioned diversion passageway, with the groundwater yield in the supplementary area of intaking, thereby satisfy the water intaking demand of water intake well. It will be understood that the wall surface of the water stop wall 4 is parallel to the vertical direction, and is also preferably coaxial with the annular permeable reactive wall 1. The height of the wall surface of the water stop wall 4 can be the same as that of the permeable reactive wall 1, and can also be larger than that of the permeable reactive wall 1, namely the bottom end of the water stop wall is positioned below the bottom end of the permeable reactive wall 1; in the vertical direction, the water-stopping walls 4 are all watertight structures, the water-guiding channel is preferably a notch or a slot opened on the water-stopping wall 4, for example, for a rectangular water-stopping wall 4, one side of the rectangular water-stopping wall may be open and communicated with the outside, or the width of the wall body of one water-stopping wall 4 is smaller than that of the wall body of the opposite water-stopping wall 4, so that a section of water-guiding gap is left, or a horizontal/vertical water-guiding channel opened on the wall body of a closed annular water-stopping wall 4, and other forms can reduce the permeability, and qualitatively, the flow area of the water-guiding channel is smaller than that of the water-guiding channel and the water-guiding channel.
The water stop wall 4 may be a watertight structure formed by cement-mixed piles, steel sheet piles, or HDPE (High density polyethylene) films. In a preferred embodiment, the water-stopping wall 4 is made of steel sheet piles, and heating pipes are arranged in the water-stopping wall 4, so that the steel sheet piles can be heated to exchange heat with the surrounding polluted underground water, so that volatile pollutants in the underground water can be at least partially removed in advance, and the subsequent purification pressure of the permeable reactive wall 1 is reduced. The heating tube is preferably an electric heating tube.
Continuing to optimize the structure of the safe water taking well, as shown in fig. 1 and 2, the permeable reactive barrier 1 includes a multi-surface annular reactive barrier 11 coaxially sleeved from the inside of the well chamber to the outside of the well chamber along the horizontal direction, and each reactive barrier 11 has a cavity and is filled with reactive filler. By arranging the multiple layers of reaction walls 11, while the gradual purification effect is achieved, other reaction walls 11 still have the effect when one or more reaction walls 11 are replaced, so that the continuous purification effect is ensured; moreover, the composition of the reaction packing in the reaction wall 11 can be adjusted according to the pollution degree of the local groundwater. In addition, each reaction wall 11 can adopt a structure that a plurality of wall body sections are combined and assembled along the circumferential direction of the wall body; for each reaction wall 11, only one or some wall segments may be replaced, or the wall segments may be sequentially lifted to replace the whole reaction wall 11.
As in fig. 2, a preferred embodiment is: the inner well casing 21 is cylindrical, and the outer well casing 22, the reaction walls 11, the supporting well wall 3 and the water stop wall 4 are all cuboid, so that construction is facilitated and the structural strength is high; the width of one wall body of the water stop wall 4 is smaller than that of the other opposite wall body, namely, a gap is formed for peripheral underground water to pass through; for the rectangular water stop wall 4 and the rectangular reaction wall 11, the gap is preferably arranged at one corner of the water stop wall 4, so that the groundwater penetrating through the gap can be prevented from directly scouring the front surface of the reaction wall 11, the groundwater can be shunted to two sides of the reaction wall 11, the groundwater can be better and uniformly distributed, the purification and remediation effects can be improved, and the failure speed of one or two reaction walls 11 can be prevented from being too high.
Example two
Groundwater in a region is contaminated with cr (vi), wherein the cr (vi) concentration in the groundwater averages about 0.9mg/L, and the first groundwater aquifer is from 2 meters underground to 6 meters underground.
The safe water taking well provided by the first embodiment is established in a local village, wherein:
the well depth is 6 m;
the diameter of the inner well casing 21 is 1 m;
the permeable reactive barrier 1 comprises two reactive barriers 11, the thickness of each reactive barrier 11 is 0.5m, and the active component of the reactive filler is a mixture of nano zero-valent iron and a carbon source;
the water stop wall 4 adopts a cuboid cement mixing pile water stop curtain, the horizontal section is square, the width of a single side is 5 meters, and the circumference is 15 meters (namely, the wall surface on one side is default).
By the restoration effect of the safe water taking well, the concentration of Cr (VI) in the underground water in the well cavity 5 is reduced to be less than 0.01mg/L, and the quality standard of II-class underground water is achieved.
EXAMPLE III
Groundwater in an area is contaminated with trichloroethylene, wherein the average concentration of trichloroethylene in the groundwater is about 1.2mg/L, and the first groundwater aquifer is from 2.5 meters underground to 7 meters underground.
The safe water taking well provided by the first embodiment is established in a local village, wherein:
the well depth is 7 m;
the diameter of the inner well casing 21 is 0.8 m;
the permeable reactive barrier 1 comprises two reactive barriers 11, the thickness of each reactive barrier 11 is 1m, and the active components of the reactive filler are nano zero-valent iron and active carbon;
the water stop wall 4 is made of rectangular steel sheet piles, the horizontal section of each steel sheet pile is square, the width of a single side of each steel sheet pile is 8 meters, and the circumference of each steel sheet pile is 30 meters (namely the width of one wall surface is 6 meters).
By the restoration effect of the safe water taking well, the concentration of the trichloroethylene in the underground water in the well cavity 5 is reduced to be less than 0.01mg/L, and the requirement of domestic water of residents is met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a safe water intaking well which characterized in that: the water supply device comprises an annular permeable reactive barrier, wherein the wall surface of the permeable reactive barrier is parallel to the vertical direction and is surrounded to form a well chamber for supplying and taking water;
the permeable reactive wall is arranged in the water taking area and is provided with a water diversion channel for guiding the peripheral underground water into the water taking area; the water-stopping wall adopts a steel sheet pile, and a heating pipe is distributed in the water-stopping wall and used for heating the steel sheet pile so as to exchange heat with surrounding polluted underground water, so that volatile pollutants in the underground water can be at least partially removed in advance;
the permeable reactive barrier comprises an upper impermeable wall body and a lower water filtering wall body, the upper impermeable wall body and the lower water filtering wall body are both cavity wall bodies, reaction fillers are filled in the cavity wall bodies, and the reaction fillers in the upper impermeable wall body can move downwards at any time to supplement the missing barriers caused by the loss or inactivation of the reaction fillers in the lower water filtering wall body.
2. A safety water intake well as claimed in claim 1, wherein: the device also comprises an annular supporting shaft which is coaxially arranged in the well chamber, and the supporting shaft is provided with a water channel for guiding the permeation water permeated by the permeable reactive wall to the cylinder cavity of the supporting shaft.
3. A safety water intake well as claimed in claim 2, wherein: the supporting shaft comprises an outer well sleeve and an inner well sleeve which are coaxially arranged, and a filtering mechanism is arranged between the outer well sleeve and the inner well sleeve.
4. A safety water intake well as claimed in claim 3, wherein: the outer well casing with enclose between the inlayer well casing and establish and form annular water filtering cavity, filtering mechanism including pack in quartz sand in the water filtering cavity.
5. A safety water intake well as claimed in claim 2, wherein: the supporting shaft comprises an upper-layer impervious cylinder and a screen pipe type lower-layer water filtering cylinder, and the lower-layer water filtering cylinder forms the water passing channel.
6. A safety water intake well according to claim 5, wherein: the bottom end of the upper-layer impervious cylinder body is positioned below a water taking place underground water line.
7. A safety water intake well as claimed in claim 1, wherein: the permeable reactive barrier is characterized by further comprising an annular supporting well wall, the supporting well wall is coaxially sleeved outside the permeable reactive barrier, and the supporting well wall is provided with a water permeable channel for guiding underground water on the periphery of the supporting well wall to the side of the permeable reactive barrier.
8. A safety water intake well according to any one of claims 1 to 7, wherein: the permeable reactive barrier comprises a plurality of annular reactive barriers which are sequentially coaxially sleeved from the inside of the well chamber to the outside of the well chamber along the horizontal direction, and each reactive barrier is provided with a cavity and is filled with reactive filler.
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| CN201711239614.5A CN107938752B (en) | 2017-11-30 | 2017-11-30 | Safety water taking well |
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| CN111943433A (en) * | 2020-08-11 | 2020-11-17 | 湖南艾布鲁环保科技股份有限公司 | Underground drinking water source protection and pollution prevention and control system and method |
| CN114394636A (en) * | 2022-01-25 | 2022-04-26 | 成都理工大学 | Combined type PRB for treating heavy metal in underground water |
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| CN104131594A (en) * | 2014-06-11 | 2014-11-05 | 山东省水利科学研究院 | Filling and water-pumping double-well treating method for treating polluted underground water |
| CN104358267A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Vacuum tube well precipitation and disposal method for rapidly restoring in-situ water and soil in polluted place |
| CN106517386A (en) * | 2016-01-14 | 2017-03-22 | 台湾塑胶工业股份有限公司 | Multilayer well pipe |
| CN205839777U (en) * | 2016-05-31 | 2016-12-28 | 中国一冶集团有限公司 | Well-points dewatering well filter structure |
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