CN110156094A - It is a kind of for handling the extraction well device of polluted underground water - Google Patents
It is a kind of for handling the extraction well device of polluted underground water Download PDFInfo
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- CN110156094A CN110156094A CN201910363297.0A CN201910363297A CN110156094A CN 110156094 A CN110156094 A CN 110156094A CN 201910363297 A CN201910363297 A CN 201910363297A CN 110156094 A CN110156094 A CN 110156094A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000000605 extraction Methods 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000003651 drinking water Substances 0.000 claims abstract description 17
- 235000020188 drinking water Nutrition 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 24
- 230000001154 acute effect Effects 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000011368 organic material Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920004933 Terylene® Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 77
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000004744 fabric Substances 0.000 description 9
- 239000003673 groundwater Substances 0.000 description 7
- 238000005070 sampling Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 239000013049 sediment Substances 0.000 description 6
- 239000002365 multiple layer Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000003911 water pollution Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000007115 recruitment Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
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- 229910003460 diamond Inorganic materials 0.000 description 1
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- 239000000706 filtrate Substances 0.000 description 1
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- 239000002689 soil Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
It is according to the present invention a kind of for handling the extraction well device of polluted underground water, including borehole wall unit and vacuum extraction unit, vacuum extraction unit has drinking-water pipe and aspiration pump, borehole wall unit includes the multiple tubular well casings and filter pipe being sequentially communicated from top to bottom, anti- blocking layer and at least one seal ring, the shaft bottom of underground water sampled well is arranged in filter pipe, the shaft bottom is located in particular formation, filter pipe has the tube body of tubular, with tube wall, multiple through-holes are provided on tube wall, at least one layer is wrapped in the filter layer on tube wall, the size of filter hole is less than the size of through-hole in filter layer, seal ring is circumferentially positioned at the lower end positioned at the well casing outer surface on filter pipe top, seal ring is made of the material of water-swellable, one end of drinking-water pipe is connected to aspiration pump, the other end is arranged in well casing, underground water is produced in vacuum extraction unit It increases under raw suction function, is flowed out by drinking-water pipe.
Description
Technical field
The invention belongs to environment protection fields, and in particular to a kind of for handling the extraction well device of polluted underground water.
Background technique
Underground water pump-and-treat technology is the most widely used technology in underground water pollution site remediation, pump-and-treat system skill
Art principle is to lay a certain number of extraction wells according to place underground water pollution range in contaminated site, pass through water pump or vacuum
Polluted underground water is retracted to ground by pump, handles Water Spreading or adapter tube net up to standard.Pump-and-treat technology has technical principle letter
The advantages that list, simple process, convenient operating maintenance etc..
The structure of extraction well is the key that one of underground water pump-and-treat technology, decides extraction efficiency and extraction technique
Success or failure.The underground water well that contaminated site groundwater extraction uses is mainly first larger-diameter in one, shaft building point brill with machine
Then well casing and screen pipe are put into centre by hole, then the filling filtrate between well casing and the borehole wall, are filled and are blocked on filter pipe
Material.Since underground water is pollution in place, it is be easy to cause greatly using water jetting, punching or boring method and tiretube process Cheng Jing
Amount polluted underground water mud leak, increase secondary pollution control difficulty, therefore at present polluted underground water repair when these
Well building method uses few.The building efficiency of above-mentioned extraction well is relatively to low；Pumped well is once built up, such as not because of building depth
Quasi-, filter clogging influence draw water effect the problems such as when occurring, correct relative difficulty.In addition, the groundwater extraction well is after use,
It is typically left in place, well casing, filtering layer and the packing more difficult taking-up of layer material utilize place subsequent development and cause unfavorable shadow
Loud and additional processing cost.
Summary of the invention
In order to simplify shaft building program, improve shaft building efficiency and conveniently remove, seek a kind of cost not only economy, environment but also friendly
Good extraction well, the present invention provides a kind of shaft buildings fast, convenient for the Novel underground water extraction well device of dismounting.
The present invention provides a kind of for handling the extraction well device of polluted underground water, is arranged in underground water sampled well,
For extracting the underground water of particular formation, have the feature that, including borehole wall unit and vacuum extraction unit, wherein vacuum
Extraction unit has drinking-water pipe and an aspiration pump, borehole wall unit include: multiple tubular well casings for being sequentially communicated from top to bottom and
Filter pipe, anti-blocking layer and at least one seal ring, wherein the shaft bottom of underground water sampled well is arranged in filter pipe, shaft bottom position
In particular formation, filter pipe includes the tube body of tubular, has tube wall, and multiple through-holes, at least one layer package are provided on tube wall
Filter layer on tube wall, the size of filter hole is less than the size of through-hole in filter layer, and the anti-blocking layer with reticular structure is surround
It is arranged on tube wall and between tube wall and filter layer, is used to support filter layer and prevents through-hole from blocking, seal ring surround and sets
The lower end in the well casing outer surface for being located at filter pipe top is set, seal ring is made of the material of water-swellable, and the one of drinking-water pipe
End is connected to aspiration pump, and the other end is arranged in well casing, and underground water increases under the suction function that vacuum extraction unit generates, and is led to
Cross drinking-water pipe outflow.
In the extraction well device provided by the present invention for handling polluted underground water, it can also have the following features:
Wherein, well lid is arranged on well head, connect with wellhead sealing, the through-hole for allowing drinking-water pipe to pass through is provided on well lid.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where by the water (flow) direction of through-hole and the angle of tube wall be acute angle.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where the center line of through-hole and the central axis of tube body, alternatively, the center line of through-hole and body central line is downward
The angle in direction is acute angle, alternatively, the angle of the upward direction of the center line of through-hole and body central line is acute angle.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where through-hole is in arc-shaped at the edge of tube wall.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where tube wall includes upper wall portion, wall section and lower wall portion from top to bottom, and multiple through-holes include setting respectively
Set the upper through-hole in upper wall portion, the middle through-hole on setting wall section and the lower through-hole on setting lower wall portion, upper through-hole
Center line and the angle in downward direction of body central line be acute angle, the center line of middle through-hole is vertical with body central line, under
The angle of the upward direction of the center line and body central line of through-hole is acute angle.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where the section of through-hole is any one in circle, ellipse and strip.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where filter layer has multilayer,
Multiple layers of filters filtering hole shape having the same, the filtering hole site in adjacent two layers filter layer is to be staggered
, alternatively, multiple layers of filters is made of the filter layer of multiple and different filtering hole shapes, with the more of different filtering hole shapes
A filter layer is arranged in a crossed manner.In addition, may be used also in the extraction well device provided by the present invention for handling polluted underground water
To have a feature in that wherein, filter layer is made of the stainless steel or high-molecular organic material of low absorbability.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where filter layer is made of any one material in terylene, polypropylene fibre, polyamide fibre (nylon), polyvinyl, polyethylene.
In addition, can also have such in the extraction well device provided by the present invention for handling polluted underground water
Feature: where well casing and tube body is all made of PVC or stainless steel material is made.
The action and effect of invention
For handling the extraction well device of polluted underground water involved according to the present invention, because of filter pipe of the invention,
The bottom of underground water sampled well is set, carries out sewage water filtration for the underground water to particular formation, filter pipe has at least one
Layer is wrapped in the filter layer on tube body, for filtering mud particles and suspended matter, without filling out between filter pipe and the borehole wall
Filtering layer is filled, material and transport recruitment cost have not only been saved, but also is avoided due to filtering layer and the packing more difficult taking-up of layer material,
Place subsequent development is utilized and is adversely affected.
In addition, groundwater extraction well device is connect using multiple well casings of modularization making with filter pipe, not only facilitate dress
Match and install, and well casing can be taken off after use with filter pipe in detection well, can be recycled through processing.
Further, the well that well casing and sampled well are blocked after the seal ring water-swellable between well casing and borehole wall is set
Gap between wall, the underground water below seal ring is flowed into tube body outside tube body by filter layer, without in well casing
Sealing layer is filled between hole wall, and there is the accurate beneficial effect for extracting destination layer.
Further, because having vacuum extraction unit, underground water rises under the suction function that vacuum extraction unit generates
Height is extracted, and underground water water outlet efficiency is greatly improved.
So extraction well device of the invention can not only effectively simplify shaft building process, promote shaft building efficiency, accurately extract mesh
Layer is marked, and well casing and filter pipe are convenient to remove, and can be recycled after processing, place subsequent development is facilitated to utilize.
Detailed description of the invention
Fig. 1 is in the embodiment of the present invention for handling the extraction well schematic device of polluted underground water；
Fig. 2 is filter pipe tube body schematic diagram in the embodiment of the present invention；
Fig. 3 is a kind of diagrammatic cross-section of through-hole in the embodiment of the present invention；
Fig. 4 is a kind of diagrammatic cross-section of through-hole in the embodiment of the present invention；
Fig. 5 is filter layer schematic diagram in the embodiment of the present invention；And
Fig. 6 is anti-blocking layer schematic diagram in the embodiment of the present invention.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed the extraction well device for handling polluted underground water of the invention.
Embodiment one
Extraction well device for handling polluted underground water is arranged in underground water sampled well, for extracting particular formation
Underground water, and after being filtered to underground water, polluted underground water to be treated is made in the negative pressure that vacuum extraction unit generates
Under, appointed place is extracted by drinking-water pipe and carries out sewage treatment.
As shown in Figure 1, extraction well device include the multiple tubular well casings 7 being sequentially communicated from top to bottom, filter pipe 11,
Seal ring 10, wellhead protecting lid 6, sampling well lid 8, vacuum extraction unit.
Well casing 7 is cylindrical, and two adjacent 7 connection types of well casing are using threaded connection or snap connection, in embodiment,
Well casing 7 is made of PVC or stainless steel material, and 3 meters or so one section, using threaded connection.When a threaded connection is used, well casing 7
Upper end be provided with internal screw thread, the reduced diameter of lower end junction and be provided with the external screw thread for matching the internal screw thread.
Alternatively, it is also possible to connect two adjacent well casings 7 using connector, the both ends of well casing 7 are respectively arranged with outer spiral shell
Line, connector is annular in shape, and the internal screw thread to match with external screw thread is provided in ring.
In embodiment, well casing 7 and filter pipe 11 are placed under sampled well, also by assembling is threadedly coupled to improve together
Shaft building efficiency, wellhead protecting lid 6 are arranged on 7 mouthfuls of uppermost well casing, and sampling well lid 8 is annularly arranged on the ground, well casing 7
It is passed through from sampling well lid 8, sampling well lid 8 is used to block the gap between well casing 7 and the borehole wall of sampled well.
The shaft bottom of the underground water sampled well of particular formation at predetermined depth is arranged in filter pipe 11, tube body 3 including tubular,
At least one layer of filter layer 4, anti-blocking layer 5,11 length of filter pipe require setting according to hydrogeologic structure and water intaking, usually
100mm-20000mm。
The bottom of tube body 3 can be closed, and can not also close.In embodiment, the bottom of tube body 3 is closed.
As shown in Fig. 2, the upper end of tube body 3 is provided with internal screw thread 1, multiple through-holes 2, through-hole 2 are provided on the tube wall of tube body 3
Section can be any one in round, ellipse and strip.
The direction of through-hole 2 is designed according to pollutant different in underground water, a kind of situation is the center line and pipe of through-hole 2
The central axis of body 3 passes through the central axis of the water (flow) direction of through-hole 2 and tube body 3 in this way.
Alternatively, the angle in downward direction of the center line of through-hole 2 and 3 center line of tube body is acute angle.
When water (flow) direction A passes through through-hole 2 as shown in Figure 3, suitable for the underground water containing oils, because of the substance of oil-containing
It is to be easy to float, is easy to pass through this kind of hole.
Alternatively, the angle of the upward direction of the center line of through-hole 2 and 3 center line of tube body is acute angle.
When water (flow) direction B passes through through-hole 2 as shown in Figure 4, it is logical by this kind to be suitable for dense non-aqueous phase liquids pollutant
Hole.
When the acute angle is 45 degree, water flow passes through with preferable effect.
Further, through-hole 2 is in arc-shaped at the edge of tube wall, i.e., the junction of through-hole 2 and tube wall is in arc-shaped, in this way
Just do not allow it is easier that the suspended matter in underground water deposits in junction.In embodiment, tube body 3 is cylindrical, using PVC material system
At, the section size of tube body 3 is identical as the section size of well casing 7, the center line of through-hole 2 and the central axis of tube body 3 lead to
The section in hole 2 is rounded, and 2 diameter of through-hole is 2mm-4mm, and adjacent circular hole spacing is 3mm-5mm.
At least one layer of filter layer 4 as shown in Figure 4 is wrapped on the tube wall of tube body 3, plays filtering underground suspended matter
Effect.
The size of filter hole is less than the size of through-hole 2 in filter layer 4.
Wherein, filter layer 4 has multilayer,
The filtering hole shape having the same of multiple layers of filters 4, the filtering hole site in adjacent two layers filter layer 4 is staggeredly to set
It sets；
Alternatively, multiple layers of filters 4 is made of the filter layer 4 of multiple and different filtering hole shapes, there are different filter hole
Multiple filter layers 4 of shape are arranged in a crossed manner.
It is required according to water intaking layer hydrogeology and water intaking, filter layer 4 can have 5-20 layers.Filter layer 4 uses low absorbability
Stainless steel or high-molecular organic material be made.
In embodiment, filter layer 4 is wrapped up by the identical filter cloth of multiple filtration hole shape, or by multiple filtration hole shape
Different filter cloth is wrapped up, and the choice of material adsorptivity of filter cloth is poor and the preferable high-molecular organic material of stability, such as
Terylene, polypropylene fibre, polyamide fibre (nylon), polyvinyl, polyethylene, composite fibre, any one in resinae.
The shape of filter hole can be in filter cloth for shapes, the shapes of the filter hole of each layer filter cloth such as rectangle, diamond shapes
Identical, the filtering hole site in adjacent two layers filter layer 4 is staggered.
Alternatively, what the shape of the filter hole of each layer filter cloth can also be different, multiple filterings with different filtering hole shapes
Layer 4 is arranged in a crossed manner.
The available smaller filter hole of filter layer 4 after multiple-layer stacked can more effectively play filtering and make
With.
In embodiment, the gap of filter cloth is divided into carse, medium and small three kinds of specifications, and mass area ratio is respectively 100g/m2、
450g/m2、800g/m2, effective aperture is respectively 0.2mm, 0.14mm, 0.07mm, and in the room temperature of underground water, (15-17 is Celsius
Degree) under, filter cloth material does not dissolve and organic pollutant, and acid and alkali-resistance.
Therefore, in filter layer 4 filter hole size be less than through-hole 2 size, i.e., it is maximum in 4 effective aperture of filter layer
Size is less than the smallest size in through-hole 2.
To avoid through-hole 2 from silting up, anti-blocking layer 5 is provided between tube body 3 and filter layer 4.
Anti- blocking layer 5 with reticular structure, is circumferentially positioned on tube wall and between tube wall and filter layer 4, for branch
Support filter layer 4 simultaneously prevents through-hole 2 from blocking.
The anti-blocking layer 5 has support and anti-blocking effect is isolated, as shown in fig. 6, being provided with multiple through-holes in anti-blocking layer 5.It is real
It applies in example, the anti-blocking layer 5 made of one layer of plastic wire separates between 3 outer wall of filter layer 4 and tube body.
Seal ring 10 is circumferentially positioned at the lower end positioned at 7 outer surface of well casing on 11 top of filter pipe, is located at well casing 7 and sampling
Between the borehole wall of well.
In addition, in order to guarantee water-stagnating effect, seal ring 10 can be set it is multiple, in the well casing 7 for being located at 11 top of filter pipe
Multiple seal rings 10 are arranged in the lower end of outer surface, parallel from bottom to up and interval.
As shown in Figure 1, seal ring 10 is arranged on well casing 7, seal ring 10 is made of the rubber material of water-swellable, rubber
The coefficient of expansion of glue material is 1.5-3, without secondary pollution；Or it is made and is enclosed in seepy material through physics using seepy material
Bentonite made of chemical modification, the bentonite have good water swelling in pH between 2-13, and the coefficient of expansion is
0.5-1.5, it is light-weight, plasticity is good, without secondary pollution.
In embodiment, seal ring 10 is made of the rubber material of water-swellable, and seal ring 10 and well casing 7 are connected using bonding
It connects, 10 quantity of seal ring is one.
The seal ring 10 of water-swellable is close with the sealing layer effect in traditional method of well construction, expands, rises after meeting water
To the effect of sealing.The gap between well casing 7 and the borehole wall of sampled well, 10 lower section of seal ring are blocked after 10 water-swellable of seal ring
Underground water flowed into tube body 3 outside tube body 3 by filter layer 4.
10 mounting means of seal ring is easy, can effectively improve shaft building efficiency.In addition, after the seal ring 10 of water-swellable is dehydrated
It will be slow contraction, detecting well after use, removal well casing can be facilitated, can be recycled after processing, cost has been saved.
Vacuum extraction unit includes drinking-water pipe 12, valve 13, gas-liquid separator 14, suction pump 15.
Wellhead protecting lid 6 is arranged on well head, connect with wellhead sealing, is provided on wellhead protecting lid 6 and allows drinking-water pipe 12
By through-hole.
One end of drinking-water pipe 12 is connected with gas-liquid separator 14, and the top of groundwater level, valve 13 is arranged in the other end
It is arranged on drinking-water pipe 12.Suction pump 15 is connected by pipeline with gas-liquid separator 14.In embodiment, the setting of suction pump 15 exists
On ground.
After opening valve 13 and suction pump 15, the negative pressure that suction pump 15 generates rises underground water to be processed, underground
Water passes through filter layer 4, and large-scale suspended particulate substance is filtered, and filtered underground water enters in filter pipe 11 through through-hole 2, on
Underground water after rising, which is extracted out in well casing 7 by drinking-water pipe 12, is pooled to specified place progress sewage treatment.
In embodiment, vacuum degree control is between 0-0.099Mpa, pump discharge of drawing water 5L-30m3/min。
One kind being modularly lauched extraction well construction method, the following steps are included:
The position of selected underground water detection well, chooses suitable boring method according to soil layer geological structure, starts sampled well
Drill-well operation, the aperture of sampled well are greater than the sum of the thickness of well casing outer diameter and 2 seal rings；
When be drilled into cover draw water destination layer when, complete sampling wellhole drilling operation；
Successively multiple well casings and filter pipe are attached, and by seal ring around be attached to the outer wall over-assemble of well casing at
Groundwater extraction well device；
Groundwater extraction well device is placed in sampled well；
Vacuum extraction unit and wellhead protecting lid are installed；
Complete the rapid build of groundwater extraction well device.
Embodiment two
The present embodiment other structures are the same as example 1, and only the pipe structure of filter pipe is different from embodiment one.
In the present embodiment, tube body is the tube body of tubular, has tube wall, is provided with multiple through-holes, the bottom of tube body on tube wall
It can close, can not also close.In embodiment, the bottom of tube body is closed.
Wherein, tube wall includes upper wall portion, wall section and lower wall portion from top to bottom,
Multiple through-holes include the upper through-hole being respectively set in upper wall portion, the middle through-hole on setting wall section and setting
Lower through-hole on lower wall portion.
The center line of upper through-hole and the angle in downward direction of body central line are acute angle.
The center line of middle through-hole is vertical with body central line.
The angle of the upward direction of the center line and body central line of lower through-hole is acute angle.
Embodiment three
The present embodiment other structures are the same as example 1, only the structure of filter pipe and the installation site of seal ring and reality
It is different to apply example one.
Filter pipe includes tube body, at least one layer of filter layer, seal ring.
The tube body of tubular has tube wall, including tube wall top and tube wall lower part, tube wall lower part are provided with multiple through-holes；
At least one layer of filter layer is wrapped in tube wall lower part；
Seal ring is circumferentially positioned at tube wall top, between well casing 7 and the borehole wall of sampled well.
Wherein, the central axis of the center line of through-hole and tube body,
Alternatively, the angle in downward direction of the center line of through-hole and body central line is acute angle,
Alternatively, the angle of the upward direction of the center line of through-hole and body central line is acute angle.
Example IV
The present embodiment other structures are identical as embodiment three, only the structure of tube body and different from embodiment three.
In the present embodiment, tube wall lower part includes upper wall portion, wall section and lower wall portion from top to bottom.
Multiple through-holes include the upper through-hole being respectively set in upper wall portion, the middle through-hole on setting wall section and setting
Lower through-hole on lower wall portion.
The center line of upper through-hole and the angle in downward direction of body central line are acute angle.
The center line of middle through-hole is vertical with body central line.
The angle of the upward direction of the center line and body central line of lower through-hole is acute angle.
Embodiment five
The present embodiment other structures are the same as example 1, and only the pipe structure of filter pipe is different from embodiment one and has
There is sediment tube.
In the present embodiment, the cylindrical shape of sediment tube, bottom closing is arranged in shaft bottom, a length of 0.5-1.0m of sediment tube.It is heavy
Pipe form sediment for accommodating the silt to precipitate.
Filter pipe is located at the top of sediment tube, and the bottom of filter pipe is not closed, and lower part is connected with sediment tube.
Demonstration example 1
Certain chemical plant carries out place underground water and receives pollution, and recovery scenario uses pump-and-treat system method.It is surveyed according to place geology
Visit as a result, formation be followed successively by from top to bottom 0-1.4m be miscellaneous fill, 1.4-5.5m is clay, 5.5-10m be silty clay,
10-16.3m and flour sand.Flour sand partial size is 0.05mm-1mm.Investigation result shows that polluted underground water is distributed mainly on silty sand ground.
According to the method for the present invention, the pumped well of 17m is set, and drilling is deep to 17m, assembles novel PVC filter pipe 7m and novel PVC well casing
10m is simultaneously put into well, caliber 100mm.According to the partial size of underground water pollutant and gravelly sand that may be present, filter cloth is chosen
850g/m2Specification, wrap up 5 layers.Drainage bore dia is 3mm, spacing 5mm.
To sum up, the present invention is only illustrated an example of gravel layer underground water pollution building extraction well, but this
Invent it is without being limited thereto, it will be appreciated by those skilled in the art that can be carried out in the case where not departing from scope of the presently claimed invention any
Change and modifies.
The action and effect of embodiment
For handling the extraction well device of polluted underground water according to involved in the present embodiment, because of drainage of the invention
Pipe, is arranged in the bottom of underground water sampled well, is filtered for the underground water to particular formation, and filter pipe has at least one layer
The filter layer being wrapped on tube body, for filtering mud particles and suspended matter, without being filled out between filter pipe and the borehole wall
Filtering layer is filled, material and transport recruitment cost have not only been saved, but also remove underground water well casing with can be convenient, to the subsequent benefit in place
With will not have an adverse effect.
In addition, extraction well device is connect using multiple well casings of modularization making with filter pipe, not only convenient for assembly and peace
Dress can be recycled after being removed using end well casing through processing.
Further, well casing and sampling are blocked after the seal ring water-swellable between well casing and the borehole wall of sampled well is set
Gap between the borehole wall of well, the underground water below seal ring are flowed into tube body outside tube body by filter layer, without
Sealing layer is filled between well casing and the borehole wall, facilitates subsequent removal well casing.
So the extraction well device of the present embodiment can not only simplify shaft building process, promoted shaft building efficiency, and well casing and
Filter pipe can be recycled after processing.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. it is a kind of for handling the extraction well device of polluted underground water, it is arranged in underground water sampled well, for extracting specifically
The underground water of layer characterized by comprising
Borehole wall unit and vacuum extraction unit,
Wherein, the vacuum extraction unit has drinking-water pipe and aspiration pump,
The borehole wall unit includes:
Multiple tubular well casings and filter pipe, anti-blocking layer and at least one seal ring being sequentially communicated from top to bottom,
Wherein, the shaft bottom of the underground water sampled well is arranged in the filter pipe, which is located in the particular formation, described
Filter pipe includes
The tube body of tubular has tube wall, is provided with multiple through-holes on the tube wall,
At least one layer is wrapped in the filter layer on the tube wall,
The size of filter hole is less than the size of the through-hole in the filter layer,
Anti- blocking layer with reticular structure is circumferentially positioned on the tube wall and between the tube wall and the filter layer,
It is used to support the filter layer and prevents the through-hole from blocking,
The seal ring is circumferentially positioned at the lower end positioned at the well casing outer surface on the filter pipe top,
The seal ring is made of the material of water-swellable,
One end of the drinking-water pipe is connected to the aspiration pump, and the other end is arranged in the well casing,
Underground water increases under the suction function that the vacuum extraction unit generates, and is flowed out by the drinking-water pipe.
2. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the well lid is arranged on well head, connect with the wellhead sealing, is provided on the well lid and allows the drinking-water pipe
By through-hole.
3. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the central axis of the center line of the through-hole and the tube body,
Alternatively, the angle in downward direction of the center line of the through-hole and the body central line is acute angle,
Alternatively, the angle of the upward direction of the center line of the through-hole and the body central line is acute angle.
4. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the through-hole is in arc-shaped at the edge of the tube wall.
5. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the tube wall includes upper wall portion, wall section and lower wall portion from top to bottom,
Multiple through-holes include the upper through-hole being respectively set in the upper wall portion, the middle through-hole on the setting wall section
And the lower through-hole on the setting lower wall portion,
The angle in downward direction of the center line of the upper through-hole and the body central line is acute angle,
The center line of the middle through-hole is vertical with the body central line,
The angle of the upward direction of the center line of the lower through-hole and the body central line is acute angle.
6. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the section of the through-hole is any one in circle, ellipse and strip.
7. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the filter layer has multilayer,
The filtering hole shape having the same of filter layer described in multilayer, the filtering hole site in filter layer described in adjacent two layers are
It is staggered,
Alternatively, filter layer described in multilayer is made of the filter layer of multiple and different filtering hole shapes, there are different filter hole shapes
Multiple filter layers of shape are arranged in a crossed manner.
8. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the filter layer is made of the stainless steel or high-molecular organic material of low absorbability.
9. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the filter layer is made of any one material in terylene, polypropylene fibre, polyamide fibre (nylon), polyvinyl, polyethylene.
10. according to claim 1 for handling the extraction well device of polluted underground water, it is characterised in that:
Wherein, the well casing and the tube body are all made of PVC or stainless steel material is made.
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