CN205977184U - Geothermal well based on complicated ground stratum - Google Patents
Geothermal well based on complicated ground stratum Download PDFInfo
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- CN205977184U CN205977184U CN201620998434.XU CN201620998434U CN205977184U CN 205977184 U CN205977184 U CN 205977184U CN 201620998434 U CN201620998434 U CN 201620998434U CN 205977184 U CN205977184 U CN 205977184U
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Abstract
The utility model provides a geothermal well based on complicated ground stratum, include from last well cementation section and filter well section to range down, the well cementation section is including 15 meters long casing pipes, adopt the grout to recharge between casing pipe and the well bore, filter well section includes the 30 meters long pipe that permeates water, it is equipped with the filter to permeate water between pipe and the well bore, just permeating water, is the packing diameter 1 between pipe and the well bore 3 centimetre the cobble. The utility model discloses in, the filter can permeate water the silt separation in the groundwater between pipe and the well bore, prevents that silt from getting into the geothermal well, has improved the quality at water source in the geothermal well to is the packing diameter 1 between pipe and the well bore permeating water 3 centimetre the cobble, with the stability of further guaranteeing filter well section, simultaneously because the filler is the same with the main component of the filter well geology that the section is located, can not influence the circulation of groundwater.
Description
Technical field
This utility model is related to geothermal well technical field and in particular to a kind of geothermal well based on complicated ground stratum.
Background technology
Underground heat is a kind of energy resource producing from earth interior nuclear fusion, and geothermal energy is a kind of clean energy resource and can be again
The raw energy, is widely used, its DEVELOPMENT PROSPECT is very wide in terms of heating and refrigerating.
Building geothermal well is the committed step that geothermal energy resources are utilized, for different geology, the casing programme of geothermal well
It is not quite similar.For the geothermal well on complicated ground stratum, such as upper strata is silty clay, and lower floor is the geology knot of boulder bed
Structure, wherein farinose argillic horizon are yellowish-brown, local folder silt, flour sand and mud, water proof relatively；The composition of boulder bed be sandstone,
Quartzite and flint etc., each composition mixes distribution, filling of meeting each other, and the water yield is enriched, and is good aquifer water-bearing stratum, but this boulder bed
In be mingled with cohesive soil and fine sand, increased the difficulty to underground water filtering, therefore, such complexity ground stratum on build ground
The filtering function of hot well is particularly critical, is entered in geothermal well with a large amount of cohesive soils and fine sand preventing water-bearing layer, leads to hoistway
Silt up, the normal use of impact geothermal well.
Utility model content
For defect of the prior art, this utility model provides a kind of geothermal well based on complicated ground stratum, to carry
The quality at water source in high geothermal well, keeps the temperature at water source in geothermal well simultaneously.
A kind of geothermal well based on complicated ground stratum that this utility model provides, including the well cementation section arranging from top to bottom
With filter well section, described well cementation section includes 15 meters of long wall casings, using cement mortar recharge between described wall casing and well bore；
Described filter well section includes 30 meters of long water-permeable pipes, is provided with filter between described water-permeable pipe and well bore, and water-permeable pipe with
A diameter of 1-3 centimetre of cobble is filled between well bore.
In this utility model, geothermal well is followed successively by well cementation section and filter well section from top to bottom, and position built by geothermal well
Geologic structure be divided into 10 meters of farinose argillic horizon and 35 meters of boulder bed from top to bottom, due to the structure of farinose argillic horizon
Loose, and water content is few, therefore in order to ensure the stability of casing programme, and prevent cold water from entering in geothermal well, will
Well cementation section depth is set to 15 meters, and is reinforced by the way of 15 meters of long wall casings and recharge cement mortar；Due to boulder bed
Water content enrich, therefore arranging depth in boulder bed is 30 meters of filter well section, is reinforced using 30 meters long of water-permeable pipes, by
It is mingled with cohesive soil and fine sand in this boulder bed, filter is set therefore between water-permeable pipe and well bore, by subsoil water
Silt intercept between water-permeable pipe and well bore, prevent silt enter geothermal well in, improve the quality at water source in geothermal well, and
Fill a diameter of 1-3 centimetre of cobble between water-permeable pipe and well bore, to be further ensured that the stability of filter well section, simultaneously
Because implant is identical with the main component of geology residing for filter well section, do not interfere with the circulation of subsoil water.
Preferably, described wall casing includes outer wall casing and interior wall casing, and described interior wall casing passes through fixed support and institute
State outer wall casing to connect, between described outer wall casing and interior wall casing, be provided with heat-insulation layer.Because well cementation section is in the upper of well bore
Side, the temperature on this stratum is relatively low, and the water source in geothermal well touches wall casing and heat will be led to scatter and disappear, therefore, in well cementation section
Place's setting heat-insulation layer can effectively prevent the loss of water source heat in geothermal well.
Preferably, described heat-insulation layer is polyurethane foaming layer.Using foaming technique between outer wall casing and interior wall casing shape
The polyurethane insulation coating becoming has good heat insulation effect, disclosure satisfy that long insulation demand, and polyurethane material tool
There are good wearability, resistance to ag(e)ing and cohesive, go for the use environment of geothermal well.
Preferably, the inner surface setting of described outer wall casing have infrared-reflecting coated.Outer wall casing inner surface setting
Infrared reflection coating can reflect to the infrared ray of polyurethane insulation coating, reduce the diffusion of polyurethane insulation coating heat, carry
High heat insulation effect.
Preferably, the outer surface of described interior wall casing is provided with solar energy heat absorbing coating.Due to interior wall casing directly contact
Water source in geothermal well, leads to its outer surface to have higher temperature, and solar energy heat absorbing coating can preferably absorb infrared ray, from
And the outer surface in interior wall casing forms a heat build-up layer, in reduction, the heat of wall casing overflows, and further increases insulation effect
Really.
Preferably, described interior wall casing and outer wall casing are stainless steel.Interior wall casing using stainless steel
The intensity of casing programme can be improved with outer wall casing, prevent well bore from caving in, and stainless steel have preferably corrosion-resistant
Property, go for complicated water source environment in geothermal well, extend the service life of geothermal well.
Preferably, the inner surface setting of described interior wall casing has corrosion-inhibiting coating.Environment due to underground typically all compares evil
Bad, the corrosivity at the water source in geothermal well are stronger, in the inner surface setting corrosion-inhibiting coating of interior wall casing, it can be protected
Shield, extends its service life.
Preferably, described filter includes first level filtering device and two-stage filter, described two-stage filter setting
In described first level filtering device；Described first level filtering device includes base pipe, protection block reinforcement and bag net, and described base pipe is circle
Pipe, described basis tube wall has been evenly arranged permeable hole, described protection block reinforcement is vertically welded in basic pipe outer wall, protection gear
Muscle is equally spaced, and described bag net is wrapped in protection block reinforcement and basic pipe outer wall, and the scope of the vertical parcel of bag net is more than protection
The scope of block reinforcement, bag net external iron wire is fastened in protection block reinforcement and basic pipe outer wall；Described two-stage filter includes
Inner tube, outer tube, dividing plate and filter element, said inner tube and outer tube are pipe, and inner and outer tubes are coaxially disposed, on outer tube wall uniformly
It is disposed with permeable hole, outer tube top is provided with suspension ring, described dividing plate one end is fixedly connected with outer wall of inner tube, the dividing plate other end is with outward
Inside pipe wall is fixedly connected, and dividing plate will be divided into multiple chambers between inner tube and outer tube, and described filter element is filled in the cavity, chamber
Room upper and lower side is uncovered, for discharging the water after filter element filtering；Described outer tube top is provided with the outer of annular outwardly
Pipe excrescence, described base pipe is provided with excrescence under excrescence and base pipe on the base pipe of inwardly projecting annular, described
Outer tube is passed down through excrescence inner circle on described base pipe, and outer tube excrescence is pressed on excrescence on base pipe, outer pipe bottom pressure
On excrescence under described base pipe, described base pipe is lined with rubber cushion between excrescence and outer tube excrescence, described base pipe
Lower between excrescence and outer pipe bottom, it is lined with rubber cushion.
Filter in this utility model includes first level filtering device and two-stage filter.Wherein first level filtering device pair
Silt carries out coarse filtration, is mainly used in filtering out oarse-grained sand, and basic tube wall has been evenly arranged permeable hole, bag net parcel
Outer in pipe, subsoil water will enter in geothermal well, first have to the permeable hole two-layer through bag net and base pipe and filter, filter out big
The sand of grain.Two-stage filter carries out fine straining to silt, is mainly used in filtering out tiny silt, two-stage filter includes
Inner tube, outer tube, dividing plate and filter element, inner tube is coaxially arranged with outside, and dividing plate is the connecting framework of inner tube and outer tube, simultaneously by inner tube
Space and outer tube between is divided into multiple cavities, filling filter element in cavity, by such design, makes whole two-stage filter
For an entirety, sound construction；Two-stage filter is mainly by the filter element two being located in the permeable hole and chamber on outer tube wall
Layer filters, and inner pipe wall is not provided with permeable hole, and chamber upper and lower end is uncovered, after subsoil water enters chamber, along the upper and lower stream of chamber
Dynamic, discharge from chamber upper and lower end, by such design, extend flow path in filter element for the subsoil water, improve filtration
Effect.First level filtering device filter opening is larger, is not easily blocked, and can filter out bulky grain sand, and two-stage filter filter opening is little, easily
Blocking, can filter out tiny silt, by the way of this classified filtering, more thoroughly can filter out sand, and can reduce
The probability of plugged filter.Outer tube is passed down through excrescence inner circle on base pipe, and outer tube excrescence is pressed in excrescence on base pipe
On, outer pipe bottom is pressed on excrescence under base pipe, so that two-stage filter and first level filtering device is combined together, and it
Between be all lined with rubber cushion, rubber cushion, good sealing effect are compacted by the deadweight of two-stage filter, silt will not be from slit flow
Go out.Two-stage filter is integral design, can separate with excrescence under excrescence on base pipe and base pipe easily, can pass through
Two-stage filter is integrally hung out geothermal well and is carried out, keeps in repair or changes by the suspension ring being arranged on outer tube top, cleans, keeps in repair
Or hang in two-stage filter in geothermal well again after changing, it is used in combination with first level filtering device, thus can extend
The service life of filter, further increases the quality at water source in geothermal well.
Preferably, described filter element is rustless steel filter element, and the outer wall of said inner tube and dividing plate are provided with consolidating outwardly
Determine part, described fixture is used for fixing described rustless steel filter element；The cross-sectional area of each chamber described is equal.Rustless steel filter element has
There is good strainability, the underground water energy after filtration meets system use requirement, its corrosion resistance, thermostability, resistance to pressure, wear-resisting
Property good, severe underground environment can be met, its core pore is uniform, accurate filtering accuracy, the flow of unit area is big, can improve
The efficiency of fine straining, improves filter efficiency, can reuse after its cleaning, free of replacement, economizes on resources, reduces cost；Through coarse filtration
Subsoil water afterwards after the permeable hole of outer tube enters chamber, along the upper and lower flowing of chamber, through the uncovered discharge of chamber, easily send out by filter element
Raw displacement, conglomeration, fixture plays fixation to rustless steel filter element, and during filtration, the flowing of water will not make filter element be subjected to displacement, filter
Core will not conglomeration, thus ensure that the normal work of filter element, improve filter effect；And the cross-sectional area of each chamber is equal, enters
Go out the water yield of chamber uniformly, effect and the efficiency of filtration can be lifted further.
Preferably, the permeable hole of described base pipe is bar hole, and the bar hole of described upper and lower adjacent two rows mutually staggers.
Using bar hole, coarse filtration can be met and require, upper and lower adjacent two rows mutually stagger, and so that permeable hole is more evenly distributed, filter and enter base
The subsoil water of plinth pipe also evenly, can lift effect and the efficiency of filtration further.
Preferably, in order to optimize structure, described protection block reinforcement adopts antirust round steel, and a diameter of 4mm of described round steel, between round steel
Away from for 20mm.
Preferably, described bag net is nylon yarn bag net.Nylon yarn bag net can filter out oarse-grained sand, reaches coarse filtration
Require.
Preferably, described iron wire adopts galvanized wire, and it is 10mm that iron wire is wound around spacing.Using galvanized wire, prevent from being wound around
Iron wire rupture because being corroded, lead to bag net to come off, simultaneously in order to optimize structure, it is 10mm that iron wire is wound around spacing.
Preferably, the permeable hole of described outer tube is circular port, and described circular port left and right two arranges and mutually staggers.Using circle
Hole, can meet the requirement of fine straining, left and right adjacent two row mutually stagger, and so that permeable hole is more evenly distributed, enter the subsoil water of chamber
Also evenly, lifting is filtered effect and efficiency.
Preferably, the discharge area of the permeable hole of described base pipe is more than the discharge area of the permeable hole of described outer tube.Base
The discharge area of the permeable hole of plinth pipe is more than the discharge area of the permeable hole of outer tube, can guarantee that coarse filtration provides enough water for fine straining
Amount, lifts filter efficiency.
Preferably, described base pipe surfaces externally and internally, the surface of the surfaces externally and internally of inner tube, the surfaces externally and internally of outer tube and permeable hole
All scribble corrosion-resistant coating.The environment of underground typically all compares badly, and corrosivity are stronger, in base pipe surfaces externally and internally, inner tube
These parts with subsoil water or soil directly contact of the surface of outer surface, the surfaces externally and internally of outer tube and permeable hole apply one layer anti-corrosion
Erosion layer, can reduce the corrosion of filter component, increase the service life.
Brief description
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
In specific embodiment or description of the prior art, the accompanying drawing of required use is briefly described.In all of the figs, similar
Element or partly typically identified by similar reference.In accompanying drawing, each element or part might not be according to actual ratios
Draw.
Fig. 1 is a kind of structural representation of geothermal well based on complicated ground stratum described in the utility model；
Fig. 2 is a kind of structural representation of the wall casing of geothermal well based on complicated ground stratum described in the utility model
Figure；
Fig. 3 is that a kind of sectional structure of the filter of geothermal well based on complicated ground stratum described in the utility model shows
It is intended to；
Fig. 4 is the A-A sectional view of Fig. 3；
Fig. 5 is the B-B sectional view of Fig. 3；
Fig. 6 is the C-C sectional view of Fig. 3；
Fig. 7 is a kind of base pipe and two of the filter of geothermal well based on complicated ground stratum described in the utility model
The structural representation that level defecator combines；
Fig. 8 is a kind of cascade filtration dress of the filter of geothermal well based on complicated ground stratum described in the utility model
The structural representation put.
Reference：
1- wall casing；2- water-permeable pipe；3- filter；
The outer wall casing of 11-；Wall casing in 12-；13- fixed support；14- polyurethane insulation coating；15- infrared reflection applies
Layer；16- solar energy heat absorbing coating；31- base pipe；32- protects block reinforcement；33- bag net；34- iron wire；35- outer tube；36- inner tube；
37- chamber；38- dividing plate；39- permeable hole；
Excrescence on 311- base pipe；Excrescence under 312- base pipe；351- outer tube excrescence；352- suspension ring；361- is solid
Determine part.
Specific embodiment
Below in conjunction with accompanying drawing, the embodiment of technical solutions of the utility model is described in detail.Following examples are only
For the technical solution of the utility model is clearly described, therefore it is only used as example, and this practicality can not be limited with this
New protection domain.
As shown in figure 1, the main component of the geologic structure of geothermal well construction position is followed successively by from top to bottom in the present embodiment
The boulder bed of 10 meters of farinose argillic horizon and 35 meters, wherein, farinose argillic horizon loosely organized, water content is few, the containing of boulder bed
The water yield is enriched, but is mingled with cohesive soil and fine sand in this boulder bed；Therefore, in order to ensure stability and the underground heat of casing programme
The quality in WIH source, this utility model embodiment provide a kind of geothermal well based on complicated ground stratum, from top to bottom according to
Secondary for well cementation section and filter well section, wherein well cementation section is 15 meters, is correspondingly reinforced using 15 meters long of wall casing 1, in the borehole wall
Cement mortar recharge is adopted, to improve the stability of geothermal well between pipe 1 and well bore；Filter well section is 30 meters, correspondingly adopts
30 meters long of water-permeable pipe 2 is reinforced, and is provided with filter 3 between water-permeable pipe 2 and well bore, and fills between water-permeable pipe 2 and well bore
A diameter of 1-3 centimetre of cobble, consolidates the stability of casing programme further, the subsoil water in boulder bed via filter 3 from
It is flowed in hole on water-permeable pipe 2 in geothermal well, the quality of groundwater after filtration is improved, in water, the content of silt is significantly
Reduce, the follow-up utilization demand to the water source in geothermal well can be met it is ensured that in geothermal well water source quality.
As shown in Fig. 2 described wall casing 1 includes outer wall casing 11 and interior wall casing 12, this interior wall casing 12 passes through to fix
Support 13 is connected with outer wall casing 11, is provided with the polyurethane heat-insulation that foaming is formed between outer wall casing 11 and interior wall casing 12
Layer 14, because well cementation section is in the top of well bore, the temperature on this stratum is relatively low, and the water source in geothermal well touches interior wall casing 12
Heat will be led to scatter and disappear, therefore, setting heat-insulation layer can effectively prevent the loss of water source heat in geothermal well at well cementation section；Institute
The inner surface stating outer wall casing 11 is provided with infrared-reflecting coated 15, and this infrared-reflecting coated 15 is with thermoset resin material
For film formation at low temp material, with low melting point and low-expansion coefficient special crown glass binding agent as high temperature bonding material, through special work
Skill processing preparation a kind of that there is infrared external reflection function, high temperature resistant, caking property is strong and the organo-mineral complexing of nontoxic pollution-free
Coating, can reflect to the infrared ray of polyurethane insulation coating 14, reduce the diffusion of polyurethane insulation coating 14 heat, improve and protect
Temp effect；Due to the water source in interior wall casing 12 directly contact geothermal well, its outer surface is led to have higher temperature, therefore in institute
The outer surface stating interior wall casing 12 is provided with solar energy heat absorbing coating 16, preferably can absorb infrared ray, thus in interior wall casing
12 outer surface forms a heat build-up layer, and in reduction, the heat of wall casing 12 overflows, and further increases heat insulation effect, this sun
Can heat absorbing coating 16 be the anodized coating of steel, there is humidity it is adaptable to use environment in geothermal well.
Above-mentioned outer wall casing 11 and interior wall casing 12 are stainless steel, can improve the intensity of casing programme, prevent
Well bore caves in, and stainless steel has preferable corrosion resistance, goes for complicated water source environment in geothermal well, prolongs
The service life of long geothermal well
Further, since the environment of underground typically all compares badly, the corrosivity at the water source in geothermal well are stronger, therefore upper
The inner surface setting stating interior wall casing 12 has corrosion-inhibiting coating, to protect to it further, extends its service life.This enforcement
, with polyurethane modified epoxy resin as substrate, with mica iron oxide red for main color stuffing, it is not to for the corrosion-inhibiting coating that example adopts
Rust steel surface has stronger adhesive force, can work for a long time and do not fall off under the moist environment of geothermal well.
As shown in fig. 3 to 7, described filter includes first level filtering device and two-stage filter, and two-stage filter is arranged
In first level filtering device；First level filtering device includes base pipe 31, protection block reinforcement 32 and the bag net 33 of circle, and base pipe 31 is managed
Permeable hole 39 is evenly arranged on wall, permeable hole 39 is bar hole, upper and lower adjacent two rows mutually stagger, protection block reinforcement 32 adopts
The antirust round steel of a diameter of 4mm, is vertically welded on base pipe 31 outer wall, and its spacing is 20mm, and bag net 33 is nylon yarn bag net
33, it is wrapped on protection block reinforcement 32 and base pipe 31 outer wall, the scope that bag net 33 vertically wraps up is more than the scope of protection block reinforcement 32,
Bag net 33 external galvanized wire 34 is fastened in protection block reinforcement 32 and base pipe 31 outer wall with 10mm spacing；Cascade filtration fills
Put including inner tube 36, outer tube 35, dividing plate 38 and filter element, inner tube 36 and outer tube 35 are pipe, and inner tube 36 and outer tube 35 coaxially set
Put, outer tube 35 tube wall has been evenly arranged permeable hole 39, permeable hole 39 is circular port, left and right two row mutually stagger, base pipe
The discharge area of permeable hole 39 is more than the discharge area of the permeable hole 39 of outer tube, and outer tube 35 top is provided with four suspension ring 352, every
Plate 38 one end is fixedly connected with inner tube 36 outer wall, and dividing plate 38 other end is fixedly connected with outer tube 35 inwall, and dividing plate 38 is by inner tube 36
It is divided into the equal chamber of multiple cross-sectional areas 37 between outer tube 35, filter element adopts rustless steel filter element, is filled in chamber 37,
Chamber 37 upper and lower side is uncovered, for discharging the water after filter element filtering, the outer wall of inner tube 36 and dividing plate 38 is provided with outwards
Prominent fixture 361, fixture 361 is used for fixing rustless steel filter element, base pipe 31 surfaces externally and internally, the interior appearance of inner tube 36
The surface in face, the surfaces externally and internally of outer tube 35 and permeable hole 39 all scribbles corrosion-resistant coating；Outer tube 35 top is provided with outwardly
Annular outer tube excrescence 351, base pipe 31 is provided with and projects under excrescence 311 and base pipe on inwardly projecting ring foundation pipe
Body 312, outer tube 35 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed in excrescence 311 on base pipe
On, outer tube 35 bottom is pressed on excrescence 312 under base pipe, and base pipe is lined between excrescence 311 and outer tube excrescence 351
Rubber cushion, is lined with rubber cushion between excrescence 312 and outer tube 35 bottom under base pipe.
Wherein first level filtering device carries out coarse filtration to silt, is mainly used in filtering out oarse-grained sand；Base pipe 31 is managed
Bar shaped permeable hole 39 has been evenly arranged on wall, upper and lower adjacent two rows mutually stagger, and so that permeable hole 39 is more evenly distributed, filter into
Enter the subsoil water of base pipe 31 also evenly, nylon yarn bag net 33 passes through to protect block reinforcement 32 pad, is wrapped in outside pipe, uses galvanized iron
Silk 34 is fixing, and subsoil water will enter in geothermal well, first has to the permeable hole 39 two-layer mistake through nylon yarn bag net 33 and base pipe
Filter, filters out oarse-grained sand.Two-stage filter carries out fine straining to silt, is mainly used in filtering out tiny silt, and two
Level defecator includes inner tube 36, outer tube 35, dividing plate 38 and filter element, and inner tube 36 is coaxially arranged with outer tube 35, and dividing plate 38 is inner tube
36 with the connecting framework of outer tube 35, the space between inner tube 36 and outer tube 35 is divided into the equal chamber of multiple cross-sectional areas simultaneously
37, filtered by such segmentation, each chamber 37 water yield uniformly, can lift the effect filtering and efficiency, the interior filling of chamber 37 is not
Rust steel filter element, by such design, makes whole two-stage filter be an entirety, sound construction；Meanwhile, rustless steel filter element
There is good strainability, the underground water energy after filtration meets system use requirement, its corrosion resistance, thermostability, resistance to pressure, resistance to
Mill property is good, can meet severe underground environment, its core pore is uniform, accurate filtering accuracy, and the flow of unit area is big, can carry
The efficiency of high fine straining, meets system water demand, can reuse after its cleaning, free of replacement, economizes on resources, reduces cost；
Two-stage filter filters mainly by the filter element two-layer in the permeable hole 39 and chamber 37 being located on outer tube 35 tube wall, permeable hole 39
Upper and lower adjacent two row mutually stagger, and so that permeable hole 39 is more evenly distributed, enter the subsoil water of chamber 37 also evenly；Base pipe
Permeable hole 39 discharge area be more than outer tube permeable hole 39 discharge area, can guarantee that coarse filtration provides enough water for fine straining
Amount, lifts filter efficiency；Inner tube 36 is not provided with permeable hole 39, chamber 37 upper and lower end opening, after subsoil water enters chamber 37, to
Flowing in chamber 37 two ends, discharges from chamber 37 upper and lower end, by such design, extend flowing in filter element for the subsoil water
Path, improves filter effect, and because, in filter process, filter element is susceptible to displacement, conglomeration, fixture 361 is filtered to rustless steel
Core plays fixation, and during filtration, the flowing of water will not make filter element be subjected to displacement, filter element will not conglomeration, thus ensure that filter element
Normal work, improves filter effect；The environment of underground typically all compares badly, and corrosivity are stronger, appearance in base pipe 31
Face, the surfaces externally and internally of inner tube 36, the surfaces externally and internally of outer tube 35 and permeable hole 39 surface these directly connect with subsoil water or soil
Tactile part applies one layer of corrosion-resistant coating, can reduce the corrosion of filter component, increase the service life.
First level filtering device filter opening is larger, is not easily blocked, and can filter out bulky grain sand, and two-stage filter filter opening is little,
Easily block, tiny silt can be filtered out, by the way of this classified filtering, more thoroughly can filter out sand, and energy
Reduce the probability of plugged filter.
Outer tube 35 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed in excrescence on base pipe
On 311, outer tube 35 bottom is pressed on excrescence 312 under base pipe, by this dismountable mode by two-stage filter and
First level filtering device is combined together, in combination with being all lined with rubber cushion between position, by the deadweight compacting of two-stage filter
Rubber cushion, good sealing effect, silt will not flow out from gap；Two-stage filter and first level filtering device detachably separate, permissible
Two-stage filter is integrally lifted cleaning, maintenance by the suspension ring 352 of outer tube 35 top setting or change, cleaning, maintenance
Or hang in two-stage filter in geothermal well again after changing, it is used in combination with first level filtering device, thus improve
The quality at water source in geothermal well.
Filter described in the present embodiment draw water different with the method for operation in recharge, specific as follows：
When drawing water, need first level filtering device and two-stage filter collective effect, secondary protection device is hung in underground heat
In well, outer tube 5 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed on excrescence 311 on base pipe,
Fit together with first level filtering device, the subsoil water containing silt flows through nylon yarn bag net 33, through the bar shaped on base pipe 31
Permeable hole 39 enters in geothermal well, completes the one-level of silt in the outer filtration through nylon yarn bag net 33 and bar shaped permeable hole 39 of well
Filter；Subsoil water after coarse filtration enters chamber 37 through the circular permeable hole on outer tube 35, the fine straining through rustless steel filter element, from
The upper and lower uncovered discharge of chamber 37, completes the cascade filtration of silt, thus being met the underground water source of Production requirement.
Recharge is intended to for the water source after utilization to go back to underground through underground heat well irrigation, in order to reduce the resistance of recharge, needs two grades
Defecator integrally hangs out outside well, and recharge water flows out through the bar shaped permeable hole 39 on base pipe 31, then passes through nylon yarn bag net
33 flow back into underground, contrary with the flow direction drawing water when filtering, and play the role of cleaning to first level filtering device, prevent filter opening from blocking up
Plug, meanwhile, after two-stage filter hangs out, can be carried out to it, keeps in repair or maintain.
Finally it should be noted that：Above example only in order to the technical solution of the utility model to be described, is not intended to limit；
Although being described in detail to this utility model with reference to the foregoing embodiments, it will be understood by those within the art that：
It still can be modified to the technical scheme described in previous embodiment, or to wherein some or all of technical characteristic
Carry out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this utility model embodiment
The scope of technical scheme, it all should be covered in the middle of the scope of claim of the present utility model and description.
Claims (10)
1. a kind of geothermal well based on complicated ground stratum, including the well cementation section arranging from top to bottom and filter well section, it is special
Levy and be：
Described well cementation section includes 15 meters of long wall casings, adopts cement mortar recharge between described wall casing and well bore；
Described filter well section includes 30 meters of long water-permeable pipes, is provided with filter between described water-permeable pipe and well bore, and permeable
A diameter of 1-3 centimetre of cobble is filled between pipe and well bore.
2. a kind of geothermal well based on complicated ground stratum according to claim 1 it is characterised in that：
Described wall casing includes outer wall casing and interior wall casing, and described interior wall casing passes through fixed support with described outer wall casing even
Connect, between described outer wall casing and interior wall casing, be provided with heat-insulation layer.
3. a kind of geothermal well based on complicated ground stratum according to claim 2 it is characterised in that：
Described heat-insulation layer is polyurethane foaming layer.
4. a kind of geothermal well based on complicated ground stratum according to claim 2 it is characterised in that：
The inner surface setting of described outer wall casing has infrared-reflecting coated.
5. a kind of geothermal well based on complicated ground stratum according to claim 4 it is characterised in that：
The outer surface of described interior wall casing is provided with solar energy heat absorbing coating.
6. a kind of geothermal well based on complicated ground stratum according to claim 2 it is characterised in that：
Described interior wall casing and outer wall casing are stainless steel.
7. a kind of geothermal well based on complicated ground stratum according to claim 6 it is characterised in that：
The inner surface setting of described interior wall casing has corrosion-inhibiting coating.
8. a kind of geothermal well based on complicated ground stratum according to claim 1 it is characterised in that：
Described filter includes first level filtering device and two-stage filter, and described two-stage filter is arranged at described one-level mistake
In filter device；
Described first level filtering device includes base pipe, protection block reinforcement and bag net, and described base pipe is pipe, described basis tube wall
On be evenly arranged permeable hole, described protection block reinforcement is vertically welded in basic pipe outer wall, protection block reinforcement be equally spaced, described
Bag net is wrapped in protection block reinforcement and basic pipe outer wall, and the scope of the vertical parcel of bag net is more than the scope of protection block reinforcement, and bag net is outer
It is fastened in protection block reinforcement and basic pipe outer wall with iron wire；
Described two-stage filter includes inner tube, outer tube, dividing plate and filter element, and said inner tube and outer tube are pipe, and inner tube is with outward
Pipe is coaxially disposed, and outer tube wall has been evenly arranged permeable hole, and outer tube top is provided with suspension ring, outside described dividing plate one end and inner tube
Wall is fixedly connected, and the dividing plate other end is fixedly connected with outer tube wall, and dividing plate will be divided into multiple chambers, institute between inner tube and outer tube
State filter element and fill in the cavity, chamber upper and lower side is uncovered, for discharging the water after filter element filtering；Described outer tube top
It is provided with the outer tube excrescence of annular outwardly, described base pipe is provided with prominent on the base pipe of inwardly projecting annular
Excrescence under body and base pipe, described outer tube is passed down through excrescence inner circle on described base pipe, and outer tube excrescence is pressed in basis
On excrescence on pipe, outer pipe bottom is pressed on excrescence under described base pipe, excrescence and outer tube excrescence on described base pipe
Between be lined with rubber cushion, be lined with rubber cushion under described base pipe between excrescence and outer pipe bottom.
9. a kind of geothermal well based on complicated ground stratum according to claim 8 it is characterised in that：
Described filter element is rustless steel filter element, and the outer wall of said inner tube and dividing plate are provided with fixture outwardly, described solid
Determine part to be used for fixing described rustless steel filter element；The cross-sectional area of each chamber described is equal.
10. a kind of geothermal well based on complicated ground stratum according to claim 8 it is characterised in that：
The permeable hole of described base pipe is bar hole, and the bar hole of described upper and lower adjacent two rows mutually staggers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246142A (en) * | 2016-08-30 | 2016-12-21 | 湖南中大经纬地热开发科技有限公司 | A kind of geothermal well based on complicated ground stratum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246142A (en) * | 2016-08-30 | 2016-12-21 | 湖南中大经纬地热开发科技有限公司 | A kind of geothermal well based on complicated ground stratum |
| CN106246142B (en) * | 2016-08-30 | 2018-10-12 | 湖南中大经纬地热开发科技有限公司 | A kind of geothermal well based on complicated ground stratum |
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