CN210313564U - Extraction well device for treating polluted underground water - Google Patents
Extraction well device for treating polluted underground water Download PDFInfo
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- CN210313564U CN210313564U CN201920619719.1U CN201920619719U CN210313564U CN 210313564 U CN210313564 U CN 210313564U CN 201920619719 U CN201920619719 U CN 201920619719U CN 210313564 U CN210313564 U CN 210313564U
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Abstract
According to the utility model discloses an extract well device for handling polluted groundwater, including wall of a well unit and vacuum extraction unit, vacuum extraction unit has drinking-water pipe and aspiration pump, the wall of a well unit includes from last to a plurality of tube-shape well casings and strainer that communicate in proper order down, prevent blocking layer and at least one seal ring, the strainer sets up in the shaft bottom of groundwater sampling well, this shaft bottom is located specific stratum, the strainer has the tube body of tube-shape, have the pipe wall, be provided with a plurality of through-holes on the pipe wall, at least one deck wraps up the filter layer on the pipe wall, the size of filtering hole is less than the size of through-hole in the filter layer, seal ring encircles the lower extreme that sets up in the well casing surface that is located strainer upper portion, seal ring adopts the material that water-swelling, the one end and the aspiration pump intercommunication of drinking-water pipe, the other end sets up in the well casing, groundwater rises, flows out through the pumping pipe.
Description
Technical Field
The utility model belongs to the environmental protection field, concretely relates to an extraction well device for handling pollute groundwater.
Background
The pumping treatment technology of underground water is the most widely used technology in repairing underground water polluted sites, and the pumping treatment technology is characterized in that a certain number of pumping wells are distributed in the polluted sites according to the pollution range of the underground water in the sites, the polluted underground water is pumped to the ground through a water pump or a vacuum pump, and the treated water reaching the standard is recharged or connected to a pipe network. The extraction treatment technology has the advantages of simple technical principle, simple and convenient process, convenient operation and maintenance and the like.
The structure of the extraction well is one of the keys of the underground water extraction and treatment technology, and determines the extraction efficiency and success or failure of the extraction technology. The underground water well for extracting underground water from polluted site is mainly characterized by that firstly, a machine is used to drill a hole with larger diameter at the well-building point, then the well pipe and filter pipe are placed in the middle, then the filter material is filled between the well pipe and well wall, and the plugging material is filled on the water filter pipe. Because underground water in a field is polluted, a large amount of polluted underground cement paste is easy to leak out when a well is formed by adopting a water injection method, a punching or drilling method and a casing method, and the difficulty of secondary pollution control is increased, so that the well building methods are rarely used when polluted underground water is repaired at present. The construction efficiency of the extraction well is relatively low; once the pumping well is built, if the problems of inaccurate building depth, filter material blockage, influence on the pumping effect and the like occur, the correction is relatively difficult. In addition, the underground water extraction well is generally left in a field after being used, and well pipes, filter layers and isolation layer materials are difficult to take out, so that adverse effects and extra treatment cost are caused to subsequent development and utilization of the field.
SUMMERY OF THE UTILITY MODEL
In order to simplify the well construction procedure, improve well construction efficiency and conveniently remove, seek the extraction well that a cost is not only economical, environment but also friendly, the utility model provides a novel groundwater extraction well device that well construction is swift, be convenient for demolish.
The utility model provides an extract well device for handling pollute groundwater sets up in the groundwater sampling well for extract the groundwater in specific stratum, has such characteristic, extract the unit including wall of a well unit and vacuum, wherein, the vacuum is extracted the unit and is had drinking-water pipe and aspiration pump, and the wall of a well unit includes: from last to a plurality of well casings and the strainer that are the tube-shape down that communicate in proper order, anti-blocking layer and at least one seal ring, wherein, the strainer sets up the shaft bottom at groundwater sampling well, and this shaft bottom is arranged in specific stratum, and the strainer has: the body of tube-shape, the pipe wall has, be provided with a plurality of through-holes on the pipe wall, at least one deck parcel filter layer on the pipe wall, the size of filtration pore is less than the size of through-hole in the filter layer, anti-blocking layer with network structure, encircle to set up on the pipe wall and lie in between pipe wall and the filter layer, be used for supporting the filter layer and prevent that the through-hole from blockking up, the lower extreme that sets up at the well casing surface that lies in strainer upper portion is encircleed to the stagnant water ring, the stagnant water ring adopts water-swelling's material to make, the one end and the aspiration pump intercommunication of drinking-water pipe, the other end sets up in the.
In the extraction well device for treating polluted groundwater provided by the utility model, the device can also have the following characteristics: wherein, the well lid sets up on the well head, with well head sealing connection, is provided with the through-hole that lets the drinking-water pipe pass through on the well lid.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the included angle between the water flow direction passing through the through hole and the pipe wall is an acute angle.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: the central line of the through hole is perpendicular to the central line of the pipe body, or the included angle between the central line of the through hole and the downward direction of the central line of the pipe body is an acute angle, or the included angle between the central line of the through hole and the upward direction of the central line of the pipe body is an acute angle.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the through hole is arc-shaped at the edge of the pipe wall.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the pipe wall includes from last upper wall part, well wall part and lower wall part down, and a plurality of through-holes are including setting up the last through-hole on the upper wall part respectively, setting up well through-hole on the well wall part and setting up the lower through-hole on the lower wall part, and the central line of going up the through-hole is the acute angle with the downward contained angle of body central line, and the central line of well through-hole is perpendicular with the body central line, and the central line of lower through-hole is the acute angle with the upward contained angle of body central line.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the cross-section of the through hole is any one of round, oval and strip.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the filter layer has a plurality of layers,
the multi-layer filter layers have the same filter hole shape, the filter hole positions in the two adjacent filter layers are arranged in a staggered mode, or the multi-layer filter layers are formed by a plurality of filter layers with different filter hole shapes, and the filter layers with different filter hole shapes are arranged in a crossed mode. In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the filter layer is made of stainless steel with low adsorptivity or an organic polymer material.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein the filter layer is made of any one of terylene, polypropylene fiber, nylon (nylon), vinylon and polyethylene.
In addition, in the utility model provides an extraction well device for handling contaminated groundwater, can also have such characteristic: wherein, the well pipe and the pipe body are both made of PVC or stainless steel materials.
Action and effect of the utility model
According to the utility model relates to an extract well device for handling pollute groundwater, because the utility model discloses a strainer sets up the bottom at groundwater sampling well for carry out sewage filtration to the groundwater on specific stratum, the strainer has the filter layer of at least one deck parcel on the body, is used for filtering earth granule and suspended solid, and need not pack the filter layer between strainer and the wall of a well, has not only practiced thrift material and transportation recruitment cost, has avoided moreover because the equal difficult taking out of filter layer and seal the interlayer material, causes adverse effect to the follow-up development utilization in place.
In addition, the groundwater extraction well device adopts a plurality of well pipes which are made in a modularized mode to be connected with the filter pipes, so that the assembly and the installation are convenient, and the well pipes and the filter pipes can be taken out after the detection well is used up and can be recycled after being treated.
Furthermore, the water stop ring arranged between the well pipe and the well hole wall can block the gap between the well pipe and the well wall of the sampling well after expanding when encountering water, and the underground water below the water stop ring flows into the well pipe from the outside of the well pipe through the filter layer, so that the sealing layer is not required to be filled between the well pipe and the well hole wall, and the device has the beneficial effect of accurately extracting the target layer.
Further, because the vacuum extraction unit is arranged, the groundwater is pumped out under the action of negative pressure generated by the vacuum extraction unit, and the groundwater outlet efficiency is greatly improved.
Therefore, the utility model discloses an extract well device can not only effectively simplify and build the well flow, promote and build well efficiency, accurate extraction target layer, and well casing and strainer can conveniently remove moreover, through handling back circulated use, make things convenient for the follow-up development in place to utilize.
Drawings
FIG. 1 is a schematic diagram of an extraction well assembly for treating contaminated groundwater in an embodiment of the present invention;
fig. 2 is a schematic view of a body of a strainer according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a through-hole in an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a through-hole in an embodiment of the present invention;
FIG. 5 is a schematic view of a filter layer in an embodiment of the present invention; and
fig. 6 is a schematic diagram of an anti-blocking layer in an embodiment of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically illustrated with reference to the attached drawings.
Example one
The extraction well device for treating the polluted underground water is arranged in the underground water sampling well and used for extracting the underground water of a specific stratum, filtering the underground water and pumping the polluted underground water to be treated to a specified place through a water pumping pipe under the action of negative pressure generated by the vacuum extraction unit to treat sewage.
As shown in fig. 1, the extraction well device comprises a plurality of tubular well pipes 7, strainer pipes 11, water stop rings 10, a wellhead protection cover 6, a sampling well lid 8 and a vacuum extraction unit which are sequentially communicated from top to bottom.
The well pipes 7 are cylindrical, the connection mode of the two adjacent well pipes 7 adopts threaded connection or buckling connection, in the embodiment, the well pipes 7 are made of PVC or stainless steel materials, and one section of the well pipes 7 is about 3 meters and is in threaded connection. When a threaded connection is used, the upper end of the well pipe 7 is provided with an internal thread, the outer diameter of the lower end connection is reduced and an external thread matching the internal thread is provided.
In addition, a connecting piece can be used for connecting two adjacent well pipes 7, external threads are respectively arranged at two ends of each well pipe 7, the connecting piece is annular, and internal threads matched with the external threads are arranged in the ring.
In the embodiment, well casing 7 and strainer 11 also pass through threaded connection equipment, put into the sample together underground to improve and build well efficiency, well head visor 6 sets up on 7 mouths of well casing of the top, and sample well lid 8 is cyclic annular setting subaerial, and well casing 7 passes from sample well lid 8, and sample well lid 8 is used for sheltering from the space between the wall of a well of well casing 7 and sample well.
The strainer 11 is arranged at the bottom of the underground water sampling well of a specific stratum at a preset depth and comprises a cylindrical pipe body 3, at least one filter layer 4 and an anti-blocking layer 5, wherein the length of the strainer 11 is set according to the hydrogeological structure and the water taking requirement, and is usually 100mm-20000 mm.
The bottom of the tube 3 may or may not be closed. In the embodiment, the bottom of the tubular body 3 is closed.
As shown in fig. 2, an internal thread 1 is provided at the upper end of the tube body 3, a plurality of through holes 2 are provided on the tube wall of the tube body 3, and the cross section of each through hole 2 may be any one of circular, oval and long-strip shapes.
The direction of the through-hole 2 is designed according to different pollutants in the ground water, and in one case, the center line of the through-hole 2 is perpendicular to the center line of the pipe body 3, so that the direction of water flow through the through-hole 2 is perpendicular to the center line of the pipe body 3.
Or the included angle between the central line of the through hole 2 and the downward direction of the central line of the tube body 3 is an acute angle.
When the water flow direction a passes through the through-hole 2 as shown in fig. 3, it is suitable for oil-containing ground water because oil-containing substances are easily floated and easily pass through the hole.
Or the included angle between the central line of the through hole 2 and the upward direction of the central line of the tube body 3 is an acute angle.
When the water flow direction B passes through the through-hole 2 as shown in fig. 4, it is suitable for heavy non-aqueous phase liquid contaminants to pass through such through-hole.
When the acute angle is 45 degrees, the water flow has a good effect.
Furthermore, the through hole 2 is arc-shaped at the edge of the pipe wall, that is, the joint of the through hole 2 and the pipe wall is arc-shaped, so that suspended matters in the groundwater are not easy to deposit at the joint. In the embodiment, the pipe body 3 is cylindrical and made of PVC materials, the sectional dimension of the pipe body 3 is the same as that of the well pipe 7, the central line of the through hole 2 is perpendicular to that of the pipe body 3, the section of the through hole 2 is circular, the diameter of the through hole 2 is 2mm-4mm, and the distance between adjacent circular holes is 3mm-5 mm.
At least one filter layer 4 as shown in fig. 4 is wrapped on the pipe wall of the pipe body 3 to play a role in filtering underground water suspended matters.
The size of the filtering holes in the filtering layer 4 is smaller than that of the through holes 2.
Wherein the filter layer 4 has a plurality of layers,
the multiple filter layers 4 have the same filter hole shape, and the filter hole positions in the two adjacent filter layers 4 are arranged in a staggered way;
alternatively, the multi-layer filter layer 4 is constituted by a plurality of filter layers 4 having different filter pore shapes, and the plurality of filter layers 4 having different filter pore shapes are arranged to intersect.
The filter layer 4 can have 5-20 layers according to the hydrogeology of the water taking layer and the water taking requirement. The filter layer 4 is made of stainless steel or organic polymer material with low adsorptivity.
In the embodiment, the filter layer 4 is wrapped by multiple layers of filter cloth with the same filter hole shape, or wrapped by multiple layers of filter cloth with different filter hole shapes, and the material of the filter cloth is selected from organic polymer materials with poor adsorptivity and good stability, such as any one of terylene, polypropylene fiber, nylon (nylon), vinylon, polyethylene fiber, mixed fiber and resin.
The shape of the filtering holes in the filtering cloth can be rectangle, rhombus and the like, the shape of the filtering holes of each layer of filtering cloth can be the same, and the filtering holes in the two adjacent layers of filtering layers 4 are arranged in a staggered way.
Alternatively, the shape of the filter pores of each filter cloth may be different, and a plurality of filter layers 4 having different filter pore shapes are arranged to intersect.
The filter layers 4 after the multilayer superposition can obtain smaller filter holes, and can more effectively play a role of filtration.
In the examples, the gaps of the filter cloth were divided into three specifications of coarse, medium and fine, and the mass per unit area was 100g/m2、450g/m2、800g/m2The equivalent pore diameters are respectively 0.2mm, 0.14mm and 0.07mm, and the pore diameters are in underground waterAt normal temperature (15-17 ℃), the material of the filter cloth is insoluble and organic pollutants are not dissolved, and the filter cloth is acid and alkali resistant.
Therefore, the size of the filtration pores in the filtration layer 4 is smaller than the size of the through-holes 2, i.e., the largest size of the equivalent pore diameters of the filtration layer 4 is smaller than the smallest size of the through-holes 2.
In order to avoid the clogging of the through holes 2, an anti-blocking layer 5 is arranged between the pipe body 3 and the filter layer 4.
The anti-blocking layer 5 with a net structure is arranged on the pipe wall in a surrounding way and is positioned between the pipe wall and the filter layer 4, and is used for supporting the filter layer 4 and preventing the through holes 2 from being blocked.
The anti-blocking layer 5 has the functions of supporting and isolating anti-blocking, and as shown in fig. 6, a plurality of through holes are arranged on the anti-blocking layer 5. In the embodiment, the filter layer 4 is separated from the outer wall of the tube body 3 by an anti-blocking layer 5 made of plastic net.
The water stop ring 10 is arranged at the lower end of the outer surface of the well pipe 7 at the upper part of the filter pipe 11 in a surrounding way and is positioned between the well pipe 7 and the wall of the sampling well.
In addition, in order to secure the water stopping effect, a plurality of water stopping rings 10 may be provided, and the plurality of water stopping rings 10 are provided in parallel from bottom to top at intervals at the lower end of the outer surface of the well pipe 7 positioned above the strainer pipe 11.
As shown in fig. 1, the water stop ring 10 is arranged on the well pipe 7, the water stop ring 10 is made of a water-swellable rubber material, and the swelling coefficient of the rubber material is 1.5-3, so that no secondary pollution is caused; or the bentonite is made of a water permeable material, the bentonite is wrapped by the physically and chemically modified bentonite, the bentonite has good water swelling property when the pH value is 2-13, the swelling coefficient is 0.5-1.5, and the bentonite is light in weight, good in plasticity and free of secondary pollution.
In the embodiment, the water stop ring 10 is made of a water-swelling rubber material, the water stop ring 10 is connected with the well pipe 7 by bonding, and the number of the water stop rings 10 is one.
The water stop ring 10 expanding when meeting water has the effect similar to that of a sealing layer in the traditional well building mode, and expands when meeting water, so that the water stop effect is achieved. The water stop ring 10 is expanded when meeting water and then seals a gap between the well pipe 7 and the wall of the sampling well, and the underground water below the water stop ring 10 flows into the pipe body 3 from the outside of the pipe body 3 through the filter layer 4.
The water stop ring 10 is simple and convenient to install, and the well building efficiency can be effectively improved. In addition, the water-swelling water stop ring 10 can be slowly contracted after being dehydrated, after the detection well is used up, the well pipe can be conveniently removed, the well pipe can be recycled after being processed, and the cost is saved.
The vacuum extraction unit comprises a water pumping pipe 12, a valve 13, a gas-liquid separator 14 and a water pump 15.
The wellhead protection cover 6 is arranged on a wellhead and is in sealing connection with the wellhead, and a through hole for the pumping pipe 12 to pass through is formed in the wellhead protection cover 6.
One end of the water pumping pipe 12 is communicated with the gas-liquid separator 14, the other end is arranged above the underground water surface, and the valve 13 is arranged on the water pumping pipe 12. The water pump 15 is communicated with the gas-liquid separator 14 through a pipeline. In the embodiment, the suction pump 15 is provided on the ground.
After the valve 13 and the water suction pump 15 are opened, the negative pressure generated by the water suction pump 15 enables the groundwater to be treated to rise, large suspended particulate matters are filtered out when the groundwater passes through the filter layer 4, the filtered groundwater enters the water filtering pipe 11 through the through hole 2, and the rising groundwater is pumped out in the well pipe 7 through the water suction pipe 12 and collected to a specified place for sewage treatment.
In the embodiment, the vacuum degree is controlled between 0 and 0.099Mpa, and the flow of the water pump is 5L to 30 m3/min。
A construction method of a modular underground water extraction well comprises the following steps:
selecting the position of an underground water detection well, selecting a proper drilling method according to the geological structure of a soil layer, and starting the drilling operation of a sampling well, wherein the aperture of the sampling well is larger than the sum of the outer diameter of a well pipe and the thicknesses of 2 water stop rings;
when drilling to cover the pumping target layer, completing the drilling operation of the sampling well hole;
connecting a plurality of well pipes and water filter pipes in sequence, and assembling the underground water extraction well device by attaching water stop rings to the outer walls of the well pipes in a surrounding manner;
placing the underground water extraction well device in a sampling well;
installing a vacuum extraction unit and a wellhead protective cover;
and finishing the rapid construction of the underground water extraction well device.
Example two
The other structures of this embodiment are the same as those of the first embodiment, except that the structure of the body of the strainer is different from that of the first embodiment.
In this embodiment, the tube body is a cylindrical tube body, and has a tube wall, and a plurality of through holes are provided on the tube wall, and the bottom of the tube body may be closed or not. In an embodiment, the bottom of the tube body is closed.
Wherein, the pipe wall includes from last upper wall portion, well wall part and the lower wall part down, and a plurality of through-holes include the last through-hole that sets up on the upper wall portion respectively, set up the well through-hole on the wall part in and set up the lower through-hole on the lower wall part.
The included angle between the central line of the upper through hole and the downward direction of the central line of the pipe body is an acute angle.
The central line of the middle through hole is vertical to the central line of the pipe body.
The central line of the lower through hole and the upward included angle of the central line of the pipe body form an acute angle.
EXAMPLE III
The other structures of the embodiment are the same as those of the first embodiment, except that the structures of the filter pipes and the installation positions of the water stop rings are different from those of the first embodiment.
The strainer comprises a pipe body, at least one filtering layer and a water stop ring.
The cylindrical pipe body is provided with a pipe wall and comprises a pipe wall upper part and a pipe wall lower part, and the pipe wall lower part is provided with a plurality of through holes;
at least one filter layer is wrapped on the lower part of the pipe wall;
the water stop ring is arranged on the upper part of the pipe wall in a surrounding way and is positioned between the well pipe 7 and the wall of the sampling well.
Wherein the central line of the through hole is vertical to the central line of the pipe body,
or the included angle between the central line of the through hole and the downward direction of the central line of the pipe body is an acute angle,
or the included angle between the central line of the through hole and the upward direction of the central line of the pipe body is an acute angle.
Example four
Other structures of this embodiment are the same as the three phases of the embodiment, but the structure of the pipe body is different from the three phases of the embodiment.
In this embodiment, the lower portion of the tube wall includes an upper wall portion, a middle wall portion, and a lower wall portion from top to bottom.
The plurality of through holes include an upper through hole provided on the upper wall portion, a middle through hole provided on the middle wall portion, and a lower through hole provided on the lower wall portion, respectively.
The included angle between the central line of the upper through hole and the downward direction of the central line of the pipe body is an acute angle.
The central line of the middle through hole is vertical to the central line of the pipe body.
The central line of the lower through hole and the upward included angle of the central line of the pipe body form an acute angle.
EXAMPLE five
The other structure of this embodiment is the same as that of the first embodiment, except that the structure of the body of the strainer is different from that of the first embodiment and has a settling tube.
In the embodiment, the settling tube is cylindrical, the bottom of the settling tube is closed, the settling tube is arranged at the bottom of the well, and the length of the settling tube is 0.5-1.0 m. The settling pipe is used for accommodating silt which is settled down.
The strainer is positioned at the upper part of the settling pipe, the bottom of the strainer is not closed, and the lower part of the strainer is communicated with the settling pipe.
Example 1
The ground water in a certain chemical plant is polluted, and the pumping treatment method is adopted in the restoration scheme. According to the geological exploration result of the site, the stratum of the site is sequentially filled with miscellaneous fill of 0-1.4m, clay of 1.4-5.5m, silty clay of 5.5-10m, silt of 10-16.3m and silt from top to bottom. The particle size of the silt is 0.05mm-1 mm. The investigation results show that the polluted groundwater is mainly distributed in the silt layer. According to the utility model discloses a method sets up 17 m's pumped well, and the drilling is deep to 17m, assembles novel PVC strainer 7m and novel PVC well casing 10m and puts into the well, and the pipe diameter is 100 mm. The filter cloth is selected to be 850g/m according to the particle size of pollutants and gravels possibly existing in the underground water 25 layers of wrapping. The diameter of the water filtering holes is 3mm, and the distance is5mm。
In summary, the present invention has been described with respect to only one example of constructing an extraction well contaminated with gravel bed groundwater, but the present invention is not limited thereto, and those skilled in the art will appreciate that various changes and modifications may be made without departing from the scope of the present invention.
Effects and effects of the embodiments
According to the extraction well device that is used for handling pollution groundwater that this embodiment relates to, because the utility model discloses a strainer sets up the bottom at the groundwater sampling well for filter the groundwater on specific stratum, the strainer has the filter layer of at least one deck parcel on the body, is used for filtering earth granule and suspended solid, thereby need not pack the filter layer between strainer and the wall of a well, not only practiced thrift material and transportation recruitment cost, can conveniently remove the groundwater well casing moreover, can not produce adverse effect to the follow-up utilization in place.
In addition, the extraction well device adopts a plurality of well pipes which are made in a modularized mode to be connected with the strainer pipes, so that the assembly and the installation are convenient, and the well pipes can be recycled after being removed after the use.
Further, the sealing ring arranged between the well casing and the well wall of the sampling well is capable of sealing the gap between the well casing and the well wall of the sampling well after swelling when encountering water, underground water below the sealing ring flows into the pipe body from the outside of the pipe body through the filter layer, and therefore a sealing layer does not need to be filled between the well casing and the well wall, and the well casing is convenient to remove subsequently.
Therefore, the extraction well device of the embodiment not only can simplify the well construction process and improve the well construction efficiency, but also can recycle the well pipe and the filter pipe after being treated.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (10)
1. An extraction well device for treating polluted underground water, which is arranged in an underground water sampling well and is used for extracting underground water in a stratum, and is characterized by comprising:
a well wall unit and a vacuum extraction unit,
wherein the vacuum extraction unit is provided with a water pumping pipe and an air pump,
the well wall unit comprises:
a plurality of cylindrical well pipes and water filter pipes which are sequentially communicated from top to bottom, an anti-blocking layer and at least one water stop ring,
wherein the strainer is disposed at a bottom of the groundwater sampling well, the bottom being located in the formation, the strainer having:
a cylindrical pipe body having a pipe wall provided with a plurality of through holes,
at least one filter layer wrapped on the pipe wall,
the size of the filtering holes in the filtering layer is smaller than that of the through holes,
an anti-blocking layer with a net structure, which is arranged on the pipe wall in a surrounding way and is positioned between the pipe wall and the filter layer and is used for supporting the filter layer and preventing the through holes from being blocked,
the water stop ring is arranged at the lower end of the outer surface of the well pipe at the upper part of the strainer in a surrounding way,
the water stop ring is made of a material which can expand when meeting water,
one end of the water pumping pipe is communicated with the air pump, the other end of the water pumping pipe is arranged in the well pipe,
and the groundwater rises under the action of the negative pressure generated by the vacuum extraction unit and flows out through the water pumping pipe.
2. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
the wellhead protection cover is arranged on the uppermost wellhead pipe opening and is connected with the wellhead pipe opening in a sealing mode, and a through hole allowing the water pumping pipe to pass through is formed in the wellhead protection cover.
3. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein the central line of the through hole is vertical to the central line of the pipe body,
or the included angle between the central line of the through hole and the downward direction of the central line of the pipe body is an acute angle,
or the included angle between the central line of the through hole and the upward direction of the central line of the pipe body is an acute angle.
4. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein the through hole is arc-shaped at the edge of the pipe wall.
5. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein the pipe wall comprises an upper wall part, a middle wall part and a lower wall part from top to bottom,
the plurality of through holes include upper through holes provided on the upper wall portion, middle through holes provided on the middle wall portion, and lower through holes provided on the lower wall portion, respectively,
the included angle between the central line of the upper through hole and the downward direction of the central line of the pipe body is an acute angle,
the central line of the middle through hole is vertical to the central line of the pipe body,
the central line of the lower through hole and the upward included angle of the central line of the pipe body form an acute angle.
6. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein, the cross-section of through-hole is arbitrary one in circular, oval and rectangular shape.
7. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein the filter layer has a plurality of layers,
the filtering layers have the same filtering hole shape, the filtering hole positions in the two adjacent filtering layers are staggered,
or the plurality of filter layers are formed by a plurality of filter layers with different filter hole shapes, and the filter layers with different filter hole shapes are arranged in a crossed mode.
8. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein, the filter layer is made of stainless steel with low adsorptivity or an organic polymer material.
9. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein, the filter layer is made of any one of terylene, polypropylene fiber, chinlon, vinylon and polyethylene.
10. The extraction well device for treating contaminated groundwater according to claim 1, wherein:
wherein, the well casing with the body all adopts PVC or stainless steel material to make.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156094A (en) * | 2019-04-30 | 2019-08-23 | 同济大学 | It is a kind of for handling the extraction well device of polluted underground water |
| CN115463957A (en) * | 2022-10-11 | 2022-12-13 | 中国地质调查局水文地质环境地质调查中心 | Multistage injection well system for in-situ soil and underground water pollution remediation and installation method |
-
2019
- 2019-04-30 CN CN201920619719.1U patent/CN210313564U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156094A (en) * | 2019-04-30 | 2019-08-23 | 同济大学 | It is a kind of for handling the extraction well device of polluted underground water |
| CN115463957A (en) * | 2022-10-11 | 2022-12-13 | 中国地质调查局水文地质环境地质调查中心 | Multistage injection well system for in-situ soil and underground water pollution remediation and installation method |
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