Combined structure of radiation well and tube well in same well

Abstract

The utility model provides a radiation well and tube well same-well combined structure which comprises a recharge radiation well, a desilting and backflushing replacement structure and a water taking tube well which is located in the recharge radiation well and is not directly communicated with the recharge radiation well. The recharge structure and the desilting and backflushing replacement structure are all or partially located near the aeration zone and the upper aquifer; the water taking pipe well (group) is located at the deep part of the aquifer, and the distance between the water taking pipe well (group) and the recharge structure meets the exchange requirement of cooling and heating loads. The water taking pipe well is arranged in the recharge radiation well, the recharge radiation well system, the back flushing desilting replacement system and the water taking pipe well system are organically combined together, a circulation system of pumping and recharge, desilting replacement and heat exchange is formed, investment and occupied area are saved, and operation management is centralized and simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of groundwater recharge and pumping, and particularly relates to a combined structure of a radiation well and a pipe well in the same well. Background Art

[0002] As is well known, groundwater plays important resource, geological and ecological environment functions, and over-exploitation of groundwater will lead to ecological and environmental geological problems such as land subsidence, ground fissures, seawater intrusion and wetland degradation. Therefore, it is necessary to recharge groundwater to increase groundwater resources, control and raise the groundwater level, and prevent adverse consequences such as water quality deterioration, ground subsidence or seawater intrusion caused by a large drop in the groundwater level.

[0003] In the traditional method, the recharge well for recharging water into the ground and the water intake well for taking groundwater are set separately. For example, the recharge well structure disclosed in CN201420872598.9, the radiation well for groundwater recharge disclosed in CN202210216168.0, the foundation pit recharge well disclosed in CN202221766391.4, as well as the surface water intake well disclosed in CN201910446192.1, the radiation water intake well disclosed in CN201320194278.8, and the radiation water intake well structure disclosed in CN201621161467.5. The method of setting the recharge well and the water intake well separately generally has a larger floor area and is not suitable for places with tight land use. Summary of the Utility Model

[0004] The utility model aims to solve the technical problems existing in the prior art, and the purpose of the utility model is to provide a combined structure of a radiation well and a pipe well in the same well.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A combined structure of a radiation well and a pipe well in the same well, including a recharge radiation well and a water intake pipe well located in the recharge radiation well and not directly communicating with the water in the recharge radiation well, and the water intake pipe well extends into the aquifer; the recharge radiation well has a recharge structure for recharging the water therein into the shallow layer of the aquifer, and all or part of the recharge structure is above the groundwater level of the aquifer; a plurality of water intake radiation pipes diverging around are connected to the side wall of the water intake pipe well and inserted into the deep aquifer, and the water intake radiation pipes are located below the recharge structure and the distance between them meets the heat and cold load exchange requirements.

[0006] In the above technical scheme, the water intake pipe well is arranged in the recharge radiation well, so that the recharge and pumping are organically combined together, realizing the integration of pumping and recharge, reducing the pipeline layout, saving the floor area, making the operation management centralized and simple, reducing the number of drilling wells, reducing the impact on the environment caused by multi-point excavation, and being more environmentally friendly; the utility model can realize synchronous, continuous and stable large-volume pumping and large-volume recharge, and greatly improve the pumping and recharge efficiency.

[0007] In a preferred embodiment of the present utility model, the recharge structure includes multiple layers of recharge pipe groups arranged crosswise in the vertical direction and internally connected to the recharge radiation well. All or part of the recharge pipe groups are located above the groundwater level of the aquifer. Each layer of recharge pipe group includes a plurality of recharge pipes arranged at intervals in the circumferential direction.

[0008] In the above technical solution, a recharge pipe inserted into the aquifer is connected to the recharge radiation well for vertical downward infiltration recharge. Without pressurization, water can be recharged into the ground by the unpressurized infiltration method through the recharge pipe.

[0009] In a preferred embodiment of the present utility model, it further includes a silt cleaning device connected to the recharge pipe for backwashing and silt cleaning. The silt cleaning device uses high-pressure fluid to backwash the clogging zone around the recharge pipe.

[0010] In the above technical solution, the clogging zone around the recharge pipe is backwashed by high-pressure backwashing to restore the permeability of the aquifer.

[0011] In a preferred embodiment of the present utility model, the recharge radiation well is further connected with multiple layers of silt discharge pipe groups corresponding to the multiple layers of recharge pipe groups. The position of the silt discharge pipe group is lower than that of the recharge pipe group. Each layer of silt discharge pipe group includes a plurality of silt discharge pipes arranged at intervals in the circumferential direction. The outlet of the silt discharge pipe is connected to the recharge radiation well.

[0012] In the above technical solution, the blocked substances flushed by backwashing are discharged through the silt discharge pipe, reducing the amount of silt seepage downward, which is beneficial to restoring the permeability of the aquifer.

[0013] In a preferred embodiment of the present utility model, several silt discharge pipes are arranged below the recharge pipe; and / or the silt discharge pipe has a silt cleaning slope inclined towards the recharge radiation well.

[0014] In the above technical solution, high-pressure fluid flushes the clogging zone around the recharge pipe. The flushing water scatters and seeps downward, which is beneficial for the flushed silt to enter the silt discharge pipe.

[0015] In another preferred embodiment of the present utility model, the recharge pipe is further connected with a replacement device. The replacement device injects clean sand and gravel around the recharge pipe in a high-pressure manner, and the silt discharge pipe discharges the silt around the wall of the recharge pipe.

[0016] In the above technical solution, pure sand and gravel with good permeability are injected around the wall of the recharge pipe by using the recharge pipe, and the silt around the wall of the recharge pipe is discharged by using the silt discharge pipe. One injection and one discharge form a replacement circulation system to replace the silt around the wall of the recharge pipe, increase the permeability of the aquifer, and ensure continuous and stable recharge.

[0017] In another preferred embodiment of the present utility model, a control conversion device located inside the recharge radiation well is connected to the recharge pipe, and both the silt cleaning device and the replacement device are connected to the control conversion device and controlled to switch operations through the control conversion device.

[0018] In the above technical solution, the silt cleaning device and the replacement device are switched through the control conversion device, and the operation is simple.

[0019] In another preferred embodiment of the present utility model, an exhaust pipe is inserted into the recharge radiation well; and / or several exhaust pipes are inserted from the ground into the aquifer and are arranged in a ring outside the recharge radiation well.

[0020] In the above technical solution, the gas in the recharge water of the recharge radiation well is discharged by the exhaust pipe, reducing the gas in the recharge water that is recharged into the aquifer through the recharge pipe and reducing the occurrence of air resistance; the blocked gas in the aquifer is discharged through the exhaust pipe, improving the permeability of the aquifer.

[0021] In another preferred embodiment of the present utility model, a silt removal device for pumping out the dirt at the bottom of the recharge radiation well is installed in the recharge radiation well; and / or a silt removal dosing device for injecting a coagulant precipitant is installed in the recharge radiation well. The recharge radiation well is also equipped with a turbidity meter for detecting the turbidity of the water quality therein. The signal output end of the turbidity meter is connected to the turbidity input end of the controller, and the dosing output control end of the controller is connected to the enabling end of the silt removal dosing device.

[0022] In the above technical solution, by setting the silt removal device, the sediment content in the recharge water can be effectively reduced, the silting situation of the aquifer can be reduced, the stability of the recharge water volume can be ensured, and the maintenance period can be extended; the turbidity meter monitors the turbidity of the recharge water in real time, and according to the turbidity of the recharge water, the silt removal dosing device works to automatically add a quantitative coagulant precipitant to perform turbidity removal and sedimentation treatment on the flocs in the water of the recharge radiation well, avoiding the blockage of the aquifer by the flocs and stabilizing the recharge water volume.

[0023] In another preferred embodiment of the present utility model, the water intake radiation pipe penetrates through the side wall of the recharge radiation well and is inserted obliquely downward into the aquifer; and / or the water intake well pipe penetrates through the bottom of the recharge radiation well and extends downward outside the recharge radiation well. A water intake filter is provided on the side wall of the water intake well pipe outside the recharge radiation well.

[0024] In the above technical solution, the obliquely arranged water intake radiation pipe is inserted deeper, which is beneficial for heat and cold exchange; setting the water intake filter further increases the water intake area and improves the water production of the water intake well pipe.

[0025] Compared with the prior art, the specific beneficial effects of the relatively superior technical solutions of the present utility model are as follows:

[0026] 1) The utility model integrates pumping and recharge in the same well, can perform pumping and recharge synchronously, and has an independent deep pumping system and shallow recharge system, which can carry out recharge and pumping simultaneously. It is a circulation system for recharge from the shallow vadose zone of the recharge radiation well, formation heat exchange, and pumping of deep aquifers by the water intake pipe well.

[0027] 2) Through the shallow vertical recharge of the recharge radiation well, long-distance heat and cold load exchange in the formation, and deep pumping of the water intake pipe well, stable and sustainable shallow geothermal heat and cold exchange is achieved.

[0028] 3) The water intake pipe well and the water intake radiation pipe form a water intake pipe group, which increases the water intake area, can draw groundwater in large quantities, greatly improves the water intake volume, and has a large daily water output.

[0029] 4) The recharge pipe has the functions of recharge, backwashing and silt cleaning, and replacement. Through high-pressure backwashing, the blocked zone around the wall of the recharge pipe is backwashed, the silt is discharged through the silt discharge pipe, and the gas blocking in the aquifer is discharged through the exhaust pipe, restoring the permeability of the aquifer and stabilizing the recharge water volume; moreover, pure gravel with good permeability can be injected around the wall of the recharge pipe through the recharge pipe, and the silt is replaced through the silt discharge pipe, with one injection and one discharge, forming a replacement circulation system to ensure long-term and stable recharge.

[0030] 5) The recharge system (including the recharge radiation well and the recharge pipe), the water intake system (including the water intake pipe well and the water intake radiation pipe), and the silt cleaning and replacement system (including the silt cleaning device, the replacement device, the silt discharge pipe and the exhaust pipe) of the utility model can operate independently and crosswise, and can realize pumping and recharge at different times or simultaneously.

[0031] The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. Brief Description of the Drawings

[0032] The above and / or additional aspects and advantages of the utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0033] Figure 1 It is a front structural schematic diagram of the combined structure of the radiation well and the pipe well in the same well of the embodiment.

[0034] Figure 2 It is a top view schematic diagram of the combined structure of the radiation well and the pipe well in the same well of the embodiment.

[0035] The reference numerals in the drawings of the specification include: recharge radiation well 1, recharge pipe 2, silt discharge pipe 3, control conversion device 4, exhaust pipe 5, silt removal and feeding device 6, turbidimeter 7, silt discharge equipment 8, silt outlet pipe 9, water intake pipe well 10, water intake filter 11, water intake radiation pipe 12, water intake backwashing device 13, recharge range A. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or it may be the communication inside two elements. It may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] Embodiment 1

[0040] This embodiment provides a combined structure of a recharge radiation well and a production well in the same well. As shown in Figure 1 and Figure 2 , in a preferred implementation manner, the combined structure includes a recharge radiation well 1 and a production well 10 located in the recharge radiation well 1 and not directly communicating with the water in the recharge radiation well 1. The production well 10 extends into the aquifer. Preferably, the production well 10 is arranged at the center of the recharge radiation well 1. The recharge radiation well 1 is a large-diameter well, and its well diameter is preferably 8 - 10 m. The well diameter of the production well 10 is preferably 0.5 - 0.8 m. The bottoms of the recharge radiation well 1 and the production well 10 are located at a certain depth below the groundwater level. Preferably, the depth of the production well 10 is 80 - 100 meters.

[0041] Among them, the recharge radiation well 1 has a recharge structure for recharging the water therein to the shallow aquifer, such as being arranged at 10 - 20 meters underground. The recharge structure is all or partially located above the groundwater level of the aquifer. In one implementation manner, the recharge structure can adopt the existing technology. For example, a recharge filtering structure is arranged on the well wall of the recharge radiation well 1. The recharge filtering structure is a reverse wedge-shaped filtering structure made of concrete, stainless steel or fiberglass, and is for lateral recharge.

[0042] On the side wall of the water intake pipe well 10, several water intake radiation pipes 12 that diverge around it and are inserted into the deep aquifer are connected. Preferably, the water intake radiation pipes 12 are obliquely inserted downward into the aquifer. The water intake radiation pipes 12 are located below the recharge structure. The water intake radiation pipes 12 can be inserted to a depth of 80 - 100 meters, so that the vertical distance between the recharge part of the recharge radiation well 1 and the water intake part of the water intake pipe well 10 is more than 50 m, and the distance between the recharge part of the recharge radiation well 1 and the water intake part of the water intake pipe well 10 meets the requirements of heat and cold load exchange. According to the water intake volume, multiple obliquely downward water intake radiation pipes 12 can be arranged at the bottom and are hermetically connected to the water intake pipe well 10 to form a water intake pipe group, with a large water intake volume.

[0043] The utility model organically combines the recharge of the recharge radiation well 1 and the water intake of the water intake pipe well 10, realizes the integration of pumping and recharge, can simultaneously carry out shallow recharge and deep water intake, synchronous pumping and recharge, and the vertical distance between the recharge water and the water intake reaches 50 - 80 meters, that is, the heat and cold exchange distance reaches 50 - 80 meters, meeting the conditions of heat and cold exchange, so that after the recharge water fully absorbs the geothermal energy, the water is then taken by the water intake pipe well 10. As is well known, a heat and cold exchange distance of 5 - 8 meters can reach a temperature difference of about 3 °C, then the heat and cold exchange distance of 50 - 80 meters of the utility model can reach a temperature difference of 5 - 8 °C, with good heat exchange effect and better meeting the temperature difference requirements of the water source heat pump.

[0044] In the utility model, the water intake radiation pipes 12 are installed in the aquifer by the synchronous casing drilling process, and the farthest drilling distance can reach 60 - 80 m, effectively improving the water intake radiation range; the water intake radiation pipes 12 adopt a new type of filter produced by foreign advanced technology, with a large porosity (the effective porosity is 40% - 50%), a modified rust-proof material, good hydraulic conditions, and not prone to recharge blockage. Preferably, the water intake pipe well 10 passes through the bottom of the recharge radiation well 1 and extends downward outside the recharge radiation well 1, and a water intake filter 11 is provided on the side wall of the water intake pipe well 10 outside the recharge radiation well 1 to increase the water intake volume.

[0045] In another preferred embodiment, the recharge structure includes multiple layers of recharge pipe groups that are arranged crosswise in the vertical direction and are internally connected to the recharge radiation well 1. All or part of the recharge pipe groups are located above the groundwater level of the aquifer. Each layer of recharge pipe group includes a plurality of recharge pipes 2 that are circumferentially spaced. Preferably, the recharge pipes 2 are arranged in the aquifer with better permeability between the vadose zone and the groundwater level, and the recharge pipes 2 are horizontally inserted into the aquifer to realize the vertical downward infiltration recharge of groundwater. Among them, the recharge pipes 2 are constructed by the synchronous casing drilling method, and the radiation length can reach 30 - 50 m, forming nearly 3000 - 8000 m 2The recharge area is increased, significantly expanding the recharge range A of the recharge radiation well 1; the effective porosity of the filtration structure adopted by the recharge pipe 2 is increased by more than 80%, making it not prone to blockage and ensuring stable recharge.

[0046] Further preferably, the combined structure further includes a silt cleaning device (not shown in the figure) connected to the recharge pipe 2 for backwashing and silt cleaning. The silt cleaning device uses high-pressure fluid (high-pressure water or high-pressure air) to backwash the blocked zone around the recharge pipe 2 (which is a prior art and will not be elaborated here), restoring the permeability of the aquifer around the recharge pipe 2 and extending its service life.

[0047] In another preferred embodiment, the recharge radiation well 1 is further connected to a multi-layer silt discharge pipe group corresponding to the multi-layer recharge pipe group. One layer of recharge pipe group is correspondingly provided with one layer of silt discharge pipe group. The position of the silt discharge pipe group is lower than that of the recharge pipe group. Each layer of silt discharge pipe group includes a plurality of silt discharge pipes 3 arranged at circumferential intervals, and the outlets of the silt discharge pipes 3 are connected to the recharge radiation well 1. Preferably, the end of the silt discharge pipe 3 is located within the end of the recharge pipe 2; two silt discharge pipes 3 are arranged on both sides below the recharge pipe 2; the silt discharge pipe 3 has a silt cleaning slope inclined towards the recharge radiation well 1, that is, the end of the silt discharge pipe 3 close to the recharge radiation well 1 is inclined up and down.

[0048] Specifically, the silt cleaning device can be started regularly or manually. During silt cleaning, the high-pressure water provided by the silt cleaning device enters the recharge pipe 2, and through the recharge pipe 2, the blocked zone around it is subjected to high-pressure backwashing. The blocked substances (including fine particle blockages and scale deposits, etc.) after washing are transported to the recharge radiation well 1 through the silt discharge pipe 3, and the blocked substances finally settle to the bottom of the recharge radiation well 1.

[0049] In another preferred embodiment, the recharge pipe 2 is further connected to a replacement device (not shown in the figure). The replacement device injects pure and better-permeability sand and gravel around the wall of the recharge pipe 2 in a high-pressure manner, and at the same time, the silt discharge pipe 3 discharges the blocked substances that form blockages. One injection and one discharge are used to replace the blocked substances around the recharge pipe 2, increasing the permeability of the aquifer and ensuring continuous and stable recharge. Among them, a control conversion device 4 located in the recharge radiation well 1 is connected to the recharge pipe 2. The silt cleaning device and the replacement device are both connected to the control conversion device 4 and controlled to switch operations through the control conversion device 4.

[0050] The blockage problems existing in the pumping and recharge process of groundwater are mainly due to the changes in groundwater flow regime, oxygen content, and water quality, which will produce a series of physical, chemical, and biological effects such as gas blockage, compaction, oxidation, and scaling, forming blockages within a certain range around the filtration structure. Therefore, it is also necessary to discharge the gas that will cause blockage of the aquifer.

[0051] Specifically, an exhaust pipe 5 can be inserted into the recharge radiation well 1 to discharge the gas in the recharge water of the recharge radiation well 1, reduce the gas in the recharge water recharged into the aquifer through the recharge pipe 2, and reduce the occurrence of gas blockage in the aquifer; and / or insert several exhaust pipes 5 arranged around the recharge radiation well 1 from the ground into the aquifer to discharge the gas that forms blockage in the aquifer, restore the permeability of the aquifer, and stabilize the recharge water volume.

[0052] In this embodiment, the outlet of the silt discharge pipe 3 is not connected or connected to the exhaust pipe 5. When the outlet of the silt discharge pipe 3 is not connected to the exhaust pipe 5, the silt in the aquifer discharged by the silt discharge pipe 3 directly enters the recharge radiation well 1 and finally sinks to the bottom of the recharge radiation well 1. The gas-silt in the aquifer discharged by the silt discharge pipe 3 also enters the recharge radiation well 1 and is discharged by the exhaust pipe 5 inserted into the recharge radiation well 1; when the outlet of the silt discharge pipe 3 is connected to the exhaust pipe 5, the silt in the aquifer discharged by the silt discharge pipe 3 falls to the bottom of the recharge radiation well 1 through the exhaust pipe 5, and the gas-silt in the aquifer discharged by the silt discharge pipe 3 directly enters the exhaust pipe 5 and is discharged by the exhaust pipe 5.

[0053] The recharge pipe 2 of the present utility model has the functions of recharge, backwashing and silt removal, and replacement. Specifically, through high-pressure backwashing, the blockage zone around the wall of the recharge pipe 2 is backwashed, the silt discharge pipe 3 discharges the silt, and the gas that forms blockage in the aquifer is discharged through the exhaust pipe 5 to restore the permeability of the aquifer and stabilize the recharge water volume; moreover, pure gravel with good permeability can be injected around the wall of the recharge pipe 2 by using the recharge pipe 2, and the silt is replaced through the silt discharge pipe 3 to increase the permeability of the aquifer.

[0054] In another preferred embodiment, a silt removal device 8 for pumping out the dirt at the bottom of the recharge radiation well 1 is installed in the recharge radiation well 1. The silt removal device 8 is a silt removal pump installed at the bottom of the recharge radiation well 1. The outlet of the silt removal device 8 is connected with a silt discharge pipe 9, and the outlet of the silt discharge pipe 9 extends to the ground. The muddy substances and flocculants in the recharge radiation well 1 precipitate to the bottom of the recharge radiation well 1 and are discharged through the silt removal device 8, which can effectively reduce the content of sediment and flocculants in the water in the recharge radiation well 1. Specifically, the silt removal device 8 can be started regularly or manually to discharge the silt (including muddy substances and flocculants) at the bottom of the recharge radiation well 1.

[0055] In another preferred embodiment, a silt removal dosing device 6 for dosing a coagulant and precipitant is installed in the recharge radiation well 1. Specifically, the silt removal dosing device 6 can be started regularly or manually. The silt removal dosing device 6 doses the coagulant and precipitant into the recharge radiation well 1 to perform turbidity removal and sedimentation treatment on the water in the recharge radiation well 1. The precipitated sediment is located at the bottom of the recharge radiation well 1 and is then discharged by the silt removal device 8, which effectively reduces the content of flocculants in the water in the recharge radiation well 1, reduces the blockage condition during the recharge process of the recharge radiation well 1, ensures the stability of the water quality and water volume of the recharge radiation well 1, and extends the maintenance period.

[0056] Further preferably, a turbidimeter 7 for detecting the turbidity of the water quality therein is also installed in the recharge radiation well 1. The signal output end of the turbidimeter 7 is connected to the turbidity input end of the controller, and the dosing output control end of the controller is connected to the enabling end of the silt removal dosing device 6. The turbidimeter 7 monitors the turbidity of the water in the recharge radiation well 1 in real time, and the controller controls the operation of the silt removal dosing device 6 according to the turbidity of the water in the recharge radiation well 1 to automatically add a quantitative coagulant.

[0057] In another preferred embodiment, control valves for controlling their channels are provided at the roots of the recharge pipe 2 and the water intake radiation pipe 12. By controlling the opening and closing of the recharge pipe 2 and the water intake radiation pipe 12, it is possible to achieve only water injection, or only water intake, or both water intake and water injection at the same time, meeting the different needs of users.

[0058] When injecting water, the recharged water enters the recharge radiation well 1 and is recharged to the shallow layer of the formation through the recharge pipe 2. The recharged water infiltrates underground and exchanges heat with the formation. The recharged water infiltrates to the deep part of the aquifer. The silt removal device is started regularly, manually, or automatically according to the water level data of the recharge radiation well. High-pressure fluid is transported through the recharge pipe 2 to the surrounding clogging zone for backwashing, and the silt discharge pipe 3 discharges the backwashed silt to the recharge radiation well 1; the replacement device is started regularly or manually, and clean gravel is injected through the recharge pipe 2 to its periphery, and the silt discharge pipe 3 discharges the silt around the recharge pipe 2 to the recharge radiation well 1, with one injection and one discharge, forming a replacement circulation system; the replacement device works simultaneously with the silt removal device in the same period, or the two work in different periods;

[0059] When taking water, the water intake radiation pipe 12 extracts the water from the deep part of the aquifer and converges to the water intake pipe well 10.

[0060] According to engineering practice, for traditional recharge wells, the annual attenuation of the recharge water volume is about 5%, and they are generally scrapped after 3 - 5 years. By means of backwashing and silt removal, replacement, and air exhaust and blockage prevention, etc., the annual attenuation of the recharge water volume of the present utility model is 1 - 2%, and the service life can reach more than 15 years, which is increased by 4 - 5 times.

[0061] According to the on-site monitoring data over the years of multiple large - diameter radiation wells that have been constructed (in places such as Sichuan, Hunan, Jiangxi, Guangxi in the south, and Liaoning, Heilongjiang in the north), the single - hole water output of the water intake holes is 0.20 - 0.30×10 3 m 3 ³ / d. In an aquifer with better permeability, the water production of a single well can reach 2.5×10 3 ³ - 3.0×10 3 ³ / d, and the recharge volume is about 60% - 70% of the water production volume (1.5×10 3 ³ - 2.0×10 3 ³ / d). In addition, according to the relevant data of the constructed water intake pipe wells, in an aquifer with better permeability, the water production of the water intake pipe group can reach 0.5 - 0.6×10 3 ³ / d.

[0062] The utility model can be widely applied to projects such as municipal engineering, ecological restoration, and water source heat pumps, mainly including: ① the original pumping and original injection of groundwater in urban construction, including the water source heat pump system and recycled water; ② the groundwater recharge in the reuse of urban sewage; ③ the centralized recharge of surface water near rivers; ④ the recharge to prevent seawater intrusion; ⑤ the restorative recharge of the ecological environment.

[0063] In the description of this specification, the descriptions with reference to terms such as "preferred embodiments", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A combined structure of a radial well and a tube well, characterized in that: It includes a reinjection radiation well and a water intake pipe well located in the reinjection radiation well and not directly connected to the water in the reinjection radiation well, wherein the water intake pipe well extends into the aquifer; The reinjection radiation well has a reinjection structure located in a shallow layer for reinjecting water therein into the aquifer, and the reinjection structure is entirely or partially located above the groundwater level of the aquifer; The side wall of the water intake pipe well is connected with a plurality of water intake radiation pipes which are divergent around it and inserted into the deep aquifer. The water intake radiation pipes are located below the recharging structure and the distance between the two meets the exchange requirements of cold and hot loads.

2. The combined structure of radial well and tube well according to claim 1 is characterized in that: The reinjection structure includes a multi-layer reinjection pipe group arranged crosswise in a vertical direction and connected to the inside of the reinjection radiation well. All or part of the reinjection pipe group is located above the groundwater level of the aquifer, and each layer of the reinjection pipe group includes a plurality of reinjection pipes arranged at circumferential intervals.

3. The combined structure of radial well and tube well according to claim 2 is characterized in that: It also includes a dredging device connected to the recharging pipe for backwashing and dredging, and the dredging device uses high-pressure fluid to backwash the blocked zone around the recharging pipe.

4. The combined structure of radial well and tube well according to claim 3 is characterized in that: The reinjection radiation well is also connected to a multi-layer silt discharge pipe group corresponding to the multi-layer reinjection pipe group. The position of the silt discharge pipe group is lower than the reinjection pipe group. Each layer of the silt discharge pipe group includes a plurality of silt discharge pipes arranged at circumferential intervals. The outlets of the silt discharge pipes are connected to the reinjection radiation well.

5. The combined structure of radial well and tube well according to claim 4 is characterized in that: A plurality of silt discharge pipes are arranged below the recharging pipe; And / or the desilting pipe has a desilting slope inclined toward one side of the reinjection radiation well.

6. The combined structure of radial well and tube well according to claim 4 is characterized in that: The reinjection pipe is also connected to a replacement device, which injects clean gravel into the periphery of the reinjection pipe by means of high pressure, and the silt removal pipe discharges the silt around the wall of the reinjection pipe.

7. The combined structure of radial well and tube well according to claim 6 is characterized in that: The reinjection pipe is connected to a control conversion device located in the reinjection radiation well. The dredging device and the replacement device are both connected to the control conversion device and are switched through the control conversion device.

8. The combined structure of a radial well and a tube well according to any one of claims 1 to 7, characterized in that: An exhaust pipe is inserted into the reinjection radiation well; And / or a plurality of exhaust pipes arranged outside the reinjection radiation well are inserted from the ground into the aquifer.

9. The combined structure of a radial well and a tube well according to any one of claims 1 to 7, characterized in that: The reinjection radiation well is equipped with a desilting device for extracting dirt from the bottom of the reinjection radiation well; And / or the reinjection radiation well is equipped with a desilting device for injecting coagulant precipitant therein, and the reinjection radiation well is also equipped with a turbidity meter for detecting the turbidity of the water quality therein, the signal output end of the turbidity meter is connected to the turbidity input end of the controller, and the injection output control end of the controller is connected to the enable end of the desilting device.

10. The combined structure of a radial well and a tube well according to any one of claims 1 to 7, characterized in that: The water intake radiation pipe passes through the side wall of the reinjection radiation well and is inserted into the aquifer in a downwardly inclined manner; And / or the water intake pipe well passes through the bottom of the reinjection radiation well and extends downward to the outside of the reinjection radiation well, and a water intake filter is provided on the side wall of the water intake pipe well located outside the reinjection radiation well.

Images