CN209940624U

CN209940624U - Circulating well

Info

Publication number: CN209940624U
Application number: CN201822228262.XU
Authority: CN
Inventors: 刘宝蕴; 梁信; 孙跃林; 爱德华·阿莱西; 马塞尔·阿莱西
Original assignee: Huancui Environmental Protection Technology (shanghai) Co Ltd
Current assignee: Aiyiji environmental remediation technology (Beijing) Co., Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-01-14
Anticipated expiration: 2028-12-27

Abstract

An embodiment of the utility model provides a circulation well, include: the device comprises a well pipe, a well top cover, a well bottom cover, a first water pipe, a second water pipe, a barrier, a circulating pump, an air pipe and a gas purification device; the well pipe comprises a first screen pipe, a first wall pipe and a second screen pipe; the water inlet of the circulating pump is connected with the top end of the first water pipe, the barrier is sleeved outside the first water pipe, and one end of the second water pipe is connected with the water outlet of the circulating pump; the gas inlet of the gas purification device is communicated with the space above the barrier, and gas in the well pipe enters the gas purification device through the gas pipe under the action of the gas pump. During the treatment of contaminants in the groundwater, the groundwater permeates through the second screen below the barrier and is reinjected back into the aquifer from the seepage through the first screen above the barrier. The groundwater level can not be greatly reduced or the groundwater flow direction can not be changed, and the problem of pollution migration or diffusion can not be caused, so that the remediation treatment efficiency of the groundwater and the soil flowing through the groundwater can be improved.

Description

Circulating well

Technical Field

The utility model relates to a pollute restoration technical field, especially relate to a circulation well.

Background

For example, industrial processes may cause pollution of groundwater and soil flowing through the groundwater, and if the polluted groundwater is used as a domestic water source, the health of people is directly affected. Meanwhile, if the polluted underground water is contacted with the polluted underground water and flows through the soil, or pollutants volatilized into the air from the polluted underground water and the soil flowing through the polluted underground water are sucked, the health of people is influenced. If the underground water of the agricultural land and the soil flowing through the underground water are polluted, the underground water can cause adverse effects on crops, and the health of people can be influenced by eating the crops. Therefore, remediation of groundwater and soil contamination flowing through it is highly desirable.

The contamination of groundwater and the soil through which it flows is relatively difficult to remediate for reasons including: the soil and the underground water are not directly exposed to the surface environment like surface water or atmosphere, but have the characteristics of concealment and uncertainty, so that the underground water and the polluted area and range of the underground water flowing through the soil are difficult to define; the underground environment is complex, and the technical implementation is influenced by various factors, so the repairing time is long, and the repairing cost is high. The repair technology of underground water and soil flowing through the underground water is divided into an in-situ repair technology and an ex-situ repair technology according to whether the underground water is subjected to dredging post-treatment.

(1) Ectopic repair technology

The ex-situ remediation is to excavate or extract polluted soil or underground water from the original site where the site is polluted, and carry or transfer the polluted soil or underground water to other sites for comprehensive treatment and remediation. In general, the ex-situ remediation technology has short construction period and good pollutant removal effect; however, the implementation cost is relatively high, the ecological environment of the soil may be damaged, the implementation is difficult in sites with a large number of buildings, and secondary pollution to the surrounding environment is easily caused.

(2) In-situ repair technique

The in-situ remediation technology is a technology for directly carrying out in-situ remediation or treatment on the polluted site without moving polluted soil or underground water, is relatively low in treatment cost and small in influence on the environment, and can be used for simultaneously treating the soil and the underground water by a plurality of technologies, but generally needs a long implementation period.

At present, the pumping-treatment technology, which is commonly used in the in-situ remediation technology, adopts equipment comprising a pumping well and a reinjection well, wherein the pumping well captures underground polluted feather water and pumps the polluted feather water out of the ground, then the pumping well purifies the water by adopting a sewage treatment technology, and then the purified water is reinjected into the underground through the reinjection well. The underground water and soil pollution treatment can be carried out in a pumping-treatment-discharging mode or a pumping-treatment-upstream reinjection mode. By adopting any one of the two modes, the water level near the pumping well or the reinjection well can be changed, the flow direction of underground water near the pumping well or the reinjection well is further influenced, the underground water pollution can be dragged or pushed, the underground water pollution is easy to diffuse, and finally the repair efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a circulation well to improve remediation efficiency. The specific technical scheme is as follows:

an embodiment of the utility model provides a circulation well, the circulation well includes: the well pipe, the well top cover, the well bottom cover, the air pump, the air pipe, the air purification device, the first water pipe, the second water pipe, the barrier and the circulating pump are arranged in the well pipe;

the well top cover covers the top end of the well pipe, the well bottom cover is connected with the bottom end of the well pipe, and the well pipe comprises a first sieve pipe, a first wall pipe and a second sieve pipe which are sequentially connected from top to bottom;

the water inlet of the circulating pump is connected with the top end of the first water pipe, the blocking device is sleeved outside the first water pipe and is hermetically connected with the outer wall of the first water pipe and the inner wall of the first wall pipe, one end of the second water pipe is connected with the water outlet of the circulating pump, and the other end of the second water pipe is positioned above the blocking device;

and the gas inlet of the gas purification device is communicated with the space above the barrier in the well pipe through a gas pipe penetrating through the well top cover, and the gas in the well pipe enters the gas purification device through the gas pipe under the action of the gas pump.

Optionally, the trachea includes first trachea and second trachea, first tracheal one end with gaseous purifier's air inlet is connected, the air pump is located outside the well pipe, first tracheal other end with the gas outlet of air pump is connected, the tracheal one end of second with the air inlet of air pump is connected, and the other end runs through well top lid and with in the well casing the space intercommunication of separation ware top.

Optionally, the circulation well further comprises an exhaust pipe, and the exhaust pipe is connected with the gas outlet of the gas purification device.

Optionally, the first water pipe is filled with a water purifying material.

Optionally, the separation ware includes separation sleeve, double-layered rubber tube, and the gas charging line that double-layered rubber tube connects, the separation sleeve includes: a plate-shaped partition part and a fixed cylinder extending downwards along the outer edge of the partition part;

the isolating sleeve is sleeved outside the first water pipe through a through hole formed in the isolating part and is in sealed connection with the outer wall of the first water pipe; the leather-sandwiched rubber hose is arranged outside the fixed cylinder in a surrounding mode, and the isolation sleeve is connected with the inner wall of the first wall pipe in a sealing mode through the expansion pressure of the leather-sandwiched rubber hose.

Optionally, the first water pipe comprises an upper water pipe and a lower water pipe, and the water purifying material is filled in the lower water pipe; the bottom end of the downcomer is abutted against the well bottom cover, the side wall of the lower section of the downcomer is provided with a water inlet, and a flowing water gap is arranged between the downcomer and the well pipe; the blocking device is sleeved on the outer wall of the upper water pipe and is connected with the outer wall of the upper water pipe in a sealing mode.

Optionally, the sectional area of the inner cavity of the lower water pipe is larger than that of the inner cavity of the upper water pipe.

Optionally, the barrier is an isolation plate, the isolation plate is sleeved outside the first water pipe through a through hole formed in the isolation plate, the inner edge of the isolation plate is in sealing connection with the outer wall of the first water pipe, and the outer edge of the isolation plate is in sealing connection with the inner wall of the first wall pipe.

Optionally, the well casing further comprises a second wall pipe arranged at the top end of the first screen pipe and a flange arranged at the top end of the second wall pipe, and the well top cover covers the flange.

Optionally, the well casing further comprises a third wall pipe arranged at the bottom end of the second screen pipe, and the bottom cover is connected with the bottom end of the third wall pipe.

Optionally, the circulation well further comprises a first filter layer, an isolation layer and a second filter layer filled between the well pipe and the borehole, wherein the first filter layer surrounds the first screen pipe, the isolation layer surrounds the first wall pipe, and the second filter layer surrounds the second screen pipe.

Optionally, the circulation well further comprises a water level sensor, an air compressor and a control device;

the water level sensor is fixed on the inner wall of the well pipe or the outer wall of the first water pipe, and the control device is electrically connected with the water level sensor and the circulating pump respectively;

the air compressor machine pass through the inflation pipeline with the double-skin rubber tube is connected, controlling means with the air compressor machine electricity is connected.

An embodiment of the utility model provides a circulation well, the circulation well includes: the well pipe, the well top cover, the well bottom cover, and a first water pipe, a barrier, a circulating pump, an air pipe and an air purification device which are arranged in the well pipe; the well top cover covers the top end of the well pipe, the well bottom cover is connected with the bottom end of the well pipe, and the well pipe comprises a first sieve pipe, a first wall pipe and a second sieve pipe which are sequentially connected from top to bottom; the circulating pump is connected to the end part of the first water pipe, and the barrier is sleeved outside the first water pipe and is in sealing connection with the outer wall of the first water pipe and the inner wall of the first wall pipe; and the gas inlet of the gas purification device is communicated with the space above the barrier in the well pipe through a gas pipe penetrating through the well top cover, and the gas in the well pipe enters the gas purification device through the gas pipe under the action of the gas pump.

Under the action of the circulating pump, underground water flows into the well pipe through the pipe wall of the second sieve pipe, namely below the barrier, then flows through the first water pipe, the circulating pump and the second water pipe and gushes to the upper side of the barrier, the end part of the air pipe extending into the well pipe is higher than the water level above the barrier in the well pipe, the underground water releases polluted gas after gushing out from the second water pipe, and the polluted gas enters the space above the water level above the barrier. Under the effect of air pump, the polluted gas enters into gas purification device through the trachea, can handle the polluted gas through gas purification device, and the gas after the processing can be discharged through purification unit. After the polluted gas in the underground water is removed by volatilization, the polluted gas flows out of the pipe wall of the first sieve pipe, namely the underground water is reinjected to the underground. Therefore, the pumping and injecting balance circulation effect can be generated between the underground water-bearing layer and the circulation well, the underground water level can not be greatly reduced or the underground water flow direction can not be changed, the problem of pollution migration or diffusion can not be caused, and the repairing treatment efficiency of the underground water and the soil flowing through the underground water can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circulation well according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the prior art, based on an extraction-treatment remediation technology, when sewage treatment is performed by using a pumping well and a reinjection well, the groundwater and soil pollution treatment is performed by using an extraction-treatment-discharge mode or an extraction-treatment-upstream reinjection mode, so that the water level change near the pumping well or the reinjection well is caused, the flow direction of groundwater near the pumping well or the reinjection well is influenced, the groundwater pollution is dragged or pushed, that is, groundwater pollution diffusion is easily caused, and finally the remediation efficiency is low. In order to solve the technical problem, the embodiment of the utility model provides a circulation well.

Referring to fig. 1, an embodiment of the present invention provides a circulation well, including: the well casing 1, the well top cover 8, the well bottom cover 2, the air pump 202, the air pipe, the gas purification device 205, and the first water pipe 3, the second water pipe 7, the separator 4 and the circulation pump 5 disposed in the well casing 1, wherein the gas purification device 205 is used for treating pollution gas such as VOCs (volatile organic Compounds).

The well top cover 8 covers the top end of the well casing 1, the well bottom cover 2 is connected with the bottom end of the well casing 1, and the well casing 1 comprises a first sieve pipe 11, a first wall pipe 12 and a second sieve pipe 13 which are sequentially connected from top to bottom; wherein the first screen 11 and the second screen 13 are perforated casing sections, i.e. the first screen 11 and the second screen 13 are water permeable, the first wall pipe 12 is water impermeable and the first screen 11 and the second screen 13 are separated by the first wall pipe 12.

The water inlet of circulating pump 5 is connected with the top of first water pipe 3, and separation ware 4 suit is outside first water pipe 3, and the one end of second water pipe 7 is connected with circulating pump 5's delivery port, and the other end is located separation ware 4's top to with the inner wall sealing connection of 3 outer walls of first water pipe and first wall pipe 12. The blocking device 4 is sleeved outside the first water pipe 3 and is in sealing connection with the outer wall of the first water pipe 3 and the inner wall of the first wall pipe 12, so that direct communication of the inner cavities of the first sieve pipe 11 and the second sieve pipe 13 is blocked, and the inner cavities of the first sieve pipe 11 and the second sieve pipe 13 can only be communicated through the circulating pump 5.

The gas inlet of the gas purification device 205 is communicated with the space above the barrier 4 in the well pipe 1 through a gas pipe penetrating through the well top cover 8, and the gas in the well pipe 1 enters the gas purification device 205 through the gas pipe under the action of the gas pump 202.

In practical application, the specific size of each part of the circulating well is designed according to the depth of the underground water to be repaired. A borehole 10 is made in the ground of the site 9 to be treated, the diameter of the borehole 10 being larger than the diameter of the circulation well, i.e. the diameter of the well casing 1, for the purpose of placing the circulation well in the ground. The circulation well is laid in an open borehole 10, and the space between the borehole 10 and the well tubular 1 may be filled with soil. As shown in fig. 1, a borehole 10 is opened at the location of the contaminated area, and a well tubular 1 is inserted in the borehole 10.

Of course, the space between the wellbore 10 and the well casing 1 may also be filled with other materials, such as a filter material, a filler material and a filter material in succession between the well casing 1 and the inner wall of the wellbore 10, wherein the filter material is water-permeable, such as quartz sand, and the filler material is water-impermeable, such as bentonite and cement, such that the filter material is filled between the second screen 13 and the wellbore 10, the filler material is filled between the first casing 12 and the wellbore 10, and the space between the first screen 11 and the wellbore 10 may be filled with the filter material. As shown in fig. 1, a first filter layer 11 ', a separation layer 12' and a second filter layer 13 'are formed between the inner wall of the borehole 10 and the well casing 1, the first filter layer 11' surrounding the first screen 11, the separation layer 12 'surrounding the first wall casing 12 and the second filter layer 13' surrounding the second screen 13.

Under the action of the circulating pump 5, underground water flows into the second sieve tube 13 through the tube wall of the second sieve tube 13, then flows through the first water tube 3, the circulating pump 5 and the second water tube 7 and gushes above the separator 4, the end part of the air tube extending into the well tube 1 is higher than the water level above the separator 4 in the well tube 1, the underground water gushes out from the second water tube 7 and then releases polluted gas, and the polluted gas enters the space above the water level above the separator 4. Under the action of the air pump 202, the polluted gas enters the gas purification device 205 through the air pipe, the polluted gas can be treated by the gas purification device 205, and the treated gas can be discharged by the purification treatment device 205. After the polluted gas in the groundwater is removed by volatilization, the polluted gas flows out of the pipe wall of the first sieve pipe 11, i.e. the groundwater is reinjected to the ground. In a specific application, the water level of the underground water can be kept at the preset water level A. Therefore, the pumping and injecting balance circulation effect can be generated between the underground water-bearing layer and the circulation well, the underground water level can not be greatly reduced or the underground water flow direction can not be changed, the problem of pollution migration or diffusion can not be caused, and the repairing treatment efficiency of the underground water and the soil flowing through the underground water can be improved.

As shown in fig. 1, the gas pipe includes a first gas pipe 203 and a second gas pipe 201, one end of the first gas pipe 203 is connected to a gas inlet of a gas purification device 205, the gas pump 202 is located outside the well casing 1, the other end of the first gas pipe 203 is connected to a gas outlet of the gas pump 202, one end of the second gas pipe 201 is connected to a gas inlet of the gas pump 202, and the other end of the second gas pipe penetrates through the well top cover 8 and is communicated with a space above the barrier 4 in the well casing 1.

In addition, the circulation well may further include an exhaust pipe 204, the exhaust pipe 204 is connected to an air outlet of the gas purification device 205, and the gas purified by the gas purification device 205 may be discharged from the exhaust pipe 204.

Furthermore, the first water pipe 3 can be filled with water purifying materials 6, and the water purifying materials 6 are used for filtering pollutants in the underground water. Under the effect of circulating pump 5, groundwater passes through the in-process of first water pipe 3, and water purification material 6 can carry out pollutant purification treatment to groundwater, with gas purification device 205 combined action, improves the treatment effeciency of groundwater aquatic pollutant to further improve the treatment effect.

The filter material forming the first and second filter layers may be selected according to the actual contaminant, and if the particles of the contaminant are large, a material having a large porosity may be selected; if the contaminant particles are smaller, a less porous material may be selected. The arrangement can enable pollutants in the underground water outside the well pipe 1 to enter the well pipe 1 along with the underground water, so that the pollutants in the underground water can be conveniently treated, and the treatment efficiency of the pollutants in the underground water is improved.

Referring to fig. 1, the baffle 4 includes an isolation sleeve 41, a hose 42, and an inflation line (not shown in fig. 1) to which the hose 42 is connected, the isolation sleeve 41 including: a plate-shaped partition 411 and a fixed cylinder 412 extending downward along an outer edge of the partition 411; the hose 42 can be inflated or deflated through an inflation line.

The isolation sleeve 41 is sleeved outside the first water pipe 3 through a through hole formed in the isolation part 411 and is connected with the outer wall of the first water pipe 3 in a sealing manner; the rubber hose 42 is arranged around the fixed cylinder 412, and the isolation sleeve 41 is connected with the inner wall of the first wall pipe 12 in a sealing mode through the expansion pressure of the rubber hose 42.

For example, the plate-shaped spacer 411 is a circular plate with a through hole in the middle, and the fixed cylinder 412 is a cylinder having the same diameter as the circular plate and fixed to the outer edge of the circular plate. A circular rubber hose 42 surrounds the cylinder and is connected to the cylinder.

The isolation sleeve 41, the rubber-jacketed hose 42 and the first water pipe 3 are placed into the first wall pipe 12 together, one end of the inflation pipeline is reserved outside an upper port of the well pipe 1 and is used for being connected with external inflation equipment, the other end of the inflation pipeline is connected with the rubber-jacketed hose 42, then the rubber-jacketed hose 42 is inflated through the inflation pipeline by utilizing the inflation equipment such as an air compressor, the rubber-jacketed hose 42 is made to expand to be tightly attached to the inner wall of the first wall pipe 12 and the outer wall of the fixed cylinder 412, the isolation sleeve 41 is in sealing connection with the first wall pipe 12, the pipe inner space of the first screen pipe 11 and the pipe inner space of the second screen pipe 13 can be isolated, and the two parts are only communicated through the circulating pump 5. When the water purifying material 6 in the first water pipe 3 needs to be replaced, the air is discharged through the inflation pipeline, and after the air is discharged, the isolation sleeve 41, the rubber hose 42 and the first water pipe 3 can be pulled out of the well pipe 1 together, so that the water purifying material 6 is convenient to replace.

The utility model discloses in another embodiment of embodiment, separation ware 4 is the division board, and the through-hole that the division board was seted up through it is adorned in first water pipe 3, the inward flange of division board and the outer wall sealing connection of first water pipe 3, and the outer flange and the inner wall sealing connection of first wall pipe 12. The separator may be made of metal such as stainless steel, or may be made of gum such as High Density Polyethylene (HDPE). The outer edge of the partition plate may be connected to the inner wall of the first wall tube 12 by means of welding or gluing.

Referring to fig. 1, the first water pipe 3 includes an upper water pipe 31 and a lower water pipe 32, and the water purification material 6 is filled in the lower water pipe 32; the bottom end of the downcomer 32 is supported against the shaft bottom cover 2, the lower side wall of the downcomer 32 is provided with a water inlet, and a water flowing gap is arranged between the downcomer 32 and the well pipe 1; the obstruction device 4 is sleeved on the outer wall of the upper water pipe 31 and is connected with the outer wall of the upper water pipe 31 in a sealing way. The groundwater enters the flowing water gap through the second sieve tube 13 and then enters the water purifying material 6 from the water inlet on the side wall of the lower section of the downcomer 32, so that the length of the groundwater passing through the water purifying material 6 is increased, and the water purifying efficiency is improved.

The sectional area of the inner cavity of the lower water pipe 32 is larger than that of the inner cavity of the upper water pipe 31, the sectional area of the inner cavity of the lower water pipe 32 is a transverse sectional area vertical to the length direction of the lower water pipe 32, and the sectional area of the inner cavity of the upper water pipe 31 is a transverse sectional area vertical to the length direction of the upper water pipe 31, so that the water purifying material 6 can be conveniently filled, the filling amount of the water purifying material 6 is increased, and the water purifying efficiency is further improved.

In other embodiments, the bottom end of the downcomer 32 may be suspended in the well casing 1 instead of abutting against the bottom cover 2, in which case a gap may be provided between the downcomer 32 and the well casing 1, as long as the downcomer 32 does not completely cover the second screen 13. Of course, the water purification material 6 can be filled directly into the well pipe 1 at a level that covers part or all of the second screen 13.

Continuing to refer to fig. 1, the circulation well further comprises a second water pipe 7, a water inlet of the circulation pump 5 is connected with the top end of the first water pipe 3, one end of the second water pipe 7 is connected with a water outlet of the circulation pump 5, and the other end of the second water pipe is located above the blocking device 4. Adopt this kind of structure to make the position of drawing water in separation ware 4 below, the water injection position is located separation ware 4 top, is favorable to drawing water to annotate the setting that can pass through second water pipe 7, controls the reinjection position of the groundwater after the purification.

The well casing 1 further comprises a second wall pipe 14 arranged at the top end of the first screen pipe 11, a flange 15 arranged at the top end of the second wall pipe 14, and a well head cover 8 covering the flange 15. During the installation, the opening part of wellhole 10 is arranged in to flange 15, through the setting of second wall pipe 14, can avoid the ground polluted water directly to get into the position of the groundwater after the purification of reinjection in well casing 1 from first screen pipe 11 again through the top of the earth layer, through the setting of flange 15 and well top lid 8, can avoid the water on earth's surface directly to flow into the position of the groundwater after the purification of reinjection in well casing 1 through the mouth of pipe of well casing 1, simultaneously, can also avoid volatilizing the polluted gas above the separation ware 4 to enter into above the earth's surface and polluted air. Therefore, by providing the second wall pipe 14, the flange 15 and the well top cover 8, it is possible to prevent the water on the surface of the ground from directly contaminating the groundwater to be reinjected, and at the same time, to prevent air from being contaminated. For specific applications, the second wall pipe 14 may be filled with the above-mentioned filler or filter material or soil.

The well casing 1 further comprises a third wall tubing 16 arranged at the bottom end of the second screen 13, and the bottom casing 2 is connected to the bottom end of the second wall tubing 14. By the arrangement, silt permeating into the well pipe 1 through the second sieve pipe 13 can be settled in the third wall pipe 16, the speed of the silt accumulating on the side wall of the second sieve pipe 13 is reduced to a great extent, and therefore the efficiency of sewage remediation of the circulating well can be improved. For specific applications, the third wall tube 16 may be filled with the above-mentioned filler or filter material or soil.

The circulation well further comprises a water level sensor fixed to the inner wall of the well pipe 1 or to the outer wall of the first water pipe 3 and a control device (not shown in fig. 1) electrically connected to the water level sensor and the circulation pump 5, respectively; the control means may control the operation and stop of the circulation pump 5 according to the water level detected by the water level sensor.

The water level sensor may be directly connected to the inner wall of the well pipe 1 or may be indirectly connected to the inner wall of the well pipe 1. The water level sensor may be directly connected to the outer wall of the first water pipe 3 or indirectly connected to the outer wall of the first water pipe 3.

The circulation well can also comprise an air compressor, the air compressor is connected with an inflation pipeline, the air compressor is connected with the rubber hose 42 through the inflation pipeline, the control device is electrically connected with the air compressor, and the control device can control the air compressor so that the air compressor can inflate or exhaust the rubber hose 42. Further, the control device and the air compressor may be provided in the same control box. The shaft top cover 8 can be provided with an opening, and the inflation pipeline can penetrate through the opening.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A circulation well, comprising: the well pipe, the well top cover, the well bottom cover, the air pump, the air pipe, the air purification device, the first water pipe, the second water pipe, the barrier and the circulating pump are arranged in the well pipe;

2. The circulation well according to claim 1, wherein the air pipe comprises a first air pipe and a second air pipe, one end of the first air pipe is connected with the air inlet of the air purification device, the air pump is positioned outside the well pipe, the other end of the first air pipe is connected with the air outlet of the air pump, one end of the second air pipe is connected with the air inlet of the air pump, and the other end of the second air pipe penetrates through the well top cover and is communicated with the space above the baffle in the well pipe.

3. The circulation well according to claim 1, further comprising an exhaust pipe connected to an outlet of the gas purification apparatus.

4. A circulation well according to any one of claims 1 to 3, wherein the first water pipe is filled with a water purifying material.

5. The circulation well according to any one of claims 1 to 3, wherein the barrier is a partition plate, the partition plate is sleeved outside the first water pipe through a through hole formed in the partition plate, the inner edge of the partition plate is hermetically connected with the outer wall of the first water pipe, and the outer edge of the partition plate is hermetically connected with the inner wall of the first wall pipe.

6. The recirculation well according to any of claims 1-3, characterized in that the barrier comprises an isolation sleeve, a hose, and an inflation line to which the hose is connected, the isolation sleeve comprising: a plate-shaped partition part and a fixed cylinder extending downwards along the outer edge of the partition part;

7. The circulation well according to claim 4, wherein the first water pipe comprises an upper water pipe and a lower water pipe, and the water purification material is filled in the lower water pipe; the bottom end of the downcomer is abutted against the well bottom cover, the side wall of the lower section of the downcomer is provided with a water inlet, and a flowing water gap is arranged between the downcomer and the well pipe; the blocking device is sleeved on the outer wall of the upper water pipe and is connected with the outer wall of the upper water pipe in a sealing mode.

8. A circulation well according to any of claims 1-3, wherein the well casing further comprises a second casing arranged at the top end of the first screen, a flange arranged at the top end of the second casing, and the well head covers the flange.

9. The circulation well according to any one of claims 1 to 3, wherein the well casing further comprises a third wall tube disposed at a bottom end of the second screen, the bottom-hole lid being connected to a bottom end of the third wall tube.

10. The circulation well according to claim 6, further comprising a water level sensor, an air compressor and a control device;