A water purification and storage device

Abstract

This invention relates to a water purification and storage device, belonging to the field of water treatment technology. The invention includes an impermeable gas-sealed base plate and a water purification well assembly. The water purification well assembly comprises an outer water purification well, a middle water purification well, and an inner water purification well. The impermeable gas-sealed base plate houses the water purification well assembly, whose sidewalls purify and filter water. The impermeable gas-sealed base plate prevents water passage while allowing gas passage. The outer, middle, and inner water purification wells are each composed of several well units, with the inner water purification well units abutting each other on the device's projection surface. The outer wall of the outer water purification well, away from the center of the device's projection surface, is provided with a waterproof layer. The middle water purification well is filled with water purification material. This invention can collect and store rainwater while simultaneously purifying it to meet drinking water standards, satisfying residents' drinking water requirements.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a water purification and storage device. Background Technology

[0002] Currently, the world is facing a shortage of energy and water resources. Many places around the world are short of water, and drinking water has become a problem for people in many water-scarce areas. In order to solve the water shortage problem in these areas, many places have drilled wells, but groundwater is still scarce. These wells often rely on rainwater, river water, etc., and the water quality has not been purified and is not suitable for drinking. Water may become clearer after a long period of settling, but it is easy to become smelly and deteriorate over time.

[0003] CN106477638A discloses a drinking water purification device, comprising a main water supply pipe, a booster pump connected to the main water supply pipe, a pure water purifier connected to the booster pump, a pure water tank and a return water tank respectively connected to the pure water purifier; the main water supply pipe introduces tap water into the booster pump, which then sends the tap water to the pure water purifier for treatment; the pure water produced after treatment is sent to the pure water tank by the pure water purifier, and the wastewater produced after treatment is sent to the return water tank by the pure water purifier. This type of drinking water purification device generally includes a water storage system and a water purification system, and occupies a large area. CN111362446A discloses a drinking water purification device and its implementation method. The device includes: a first-stage filtration system that utilizes a functional nanofiber membrane filter as a pretreatment process to effectively remove particulate matter, colloids, heavy metals, and organic matter from the influent. The resulting water directly enters the second-stage filtration system through its inlet. The functional nanofiber filter is cleaned through physical rinsing and forward diffusion chemical cleaning to achieve membrane fouling control and reuse. The second-stage filtration system utilizes a charged functional ultrafiltration membrane filter as the core separation process to further purify and sterilize the pretreated influent from the first-stage filtration system, obtaining the final drinking water. The charged functional ultrafiltration membrane filter is also cleaned through physical rinsing and forward diffusion chemical cleaning to achieve membrane fouling control and reuse. This device has a complex processing technology, requires chemical dosing, and has high operation and maintenance costs. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a water purification and storage device that solves the problem of difficulty in obtaining high-quality drinking water in towns and rural areas. The device is set up in a decentralized manner for one or several households to collect rainwater on-site, purify it in place and store it, and supply water to residents after it reaches drinking water standards.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides a water purification and storage device, including an impermeable air base plate and a water purification well assembly. The water purification well assembly includes an outer water purification well, a middle water purification well, and an inner water purification well. Each of the outer, middle, and inner water purification wells is composed of several well units. The well units of the inner water purification well are located on the projected surface of the device and abut against each other. The well units of the middle water purification well are arranged sequentially and closely around the inner water purification well. The well units of the outer water purification well are arranged sequentially and closely around the middle water purification well. The middle water purification well abuts against both the outer and inner water purification wells.

[0009] The water purification well assembly has both water filtration and water purification functions;

[0010] The outer wall of the outer water purification well cylinder, away from the center of the device's projection surface, is provided with a waterproof layer.

[0011] The water purification well assembly is mounted on the impermeable air base plate, so that the water purification well assembly and the impermeable air base plate form a water storage and purification tank containing several well units; the several well units of the middle layer water purification well are filled with water purification material.

[0012] The outer water purification well is connected to the inlet water. The inlet water seeps into the middle water purification well from the side wall of the outer water purification well, and after being purified by the middle water purification well, it seeps into the inner water purification well for further purification and storage.

[0013] Optionally, the outer water purification well cylinder is formed by several first water purification well cylinder units and several fourth water purification well cylinder units connected together. The outer walls of adjacent first water purification well cylinder units and fourth water purification well cylinder units are closely connected to each other. A first connecting hole is provided between the lower part of the side walls of adjacent first water purification well cylinder units and fourth water purification well cylinder units, so that all the first water purification well cylinder units and fourth water purification well cylinder units of the outer water purification well cylinder are connected.

[0014] Optionally, at least one of the fourth water purification well units is an inlet well, and each of the fourth water purification well units has sludge collection and sludge discharge functions, and a sludge discharge pump is provided in the fourth water purification well unit.

[0015] In the fourth water purification well unit, apart from the inlet well, the rest are sludge discharge wells. The fourth water purification well unit is equipped with a sludge discharge pump for discharging the sludge deposited in the outer water purification well.

[0016] No well casing unit is installed at the locations of the water inlet well and the sludge discharge well;

[0017] The water inlet well is connected to the water inlet pipe. Water first enters the water inlet well and then enters the other first water purification well cylinder unit and the fourth water purification well cylinder unit through the first connecting hole.

[0018] Optionally, the middle-layer water purification well is formed by several second water purification well units, each second water purification well unit is filled with the water purification material, and the outer walls of adjacent second water purification well units are closely connected to each other.

[0019] The water purification material is one or more of the following: activated carbon, pumice, maifanite, volcanic rock, porous ceramsite, and porous silica sand.

[0020] Optionally, the inner water purification well cylinder is formed by several third water purification well cylinder units, and the outer walls of adjacent third water purification well cylinder units are closely connected to each other; the interior of each third water purification well cylinder unit can store and purify water; with the drainage well located at the center, the third water purification well cylinder units are arranged radially around the drainage well, and no well cylinder unit is set at the location of the drainage well located at the center; the drainage well is connected to the water outlet pipe.

[0021] The outer, middle, and inner water purification well cylinders of this invention all have the functions of water storage and water purification, and the purified water that meets the standards is discharged from the drainage well.

[0022] Optionally, a second connecting hole is provided between the lower part of the sidewall of adjacent third water purification well units, so that all the third water purification well units of the inner water purification well are connected.

[0023] Optionally, the drainage well is also connected to surface water facilities.

[0024] Optionally, the impermeable air-sealed base plate includes a double-layer permeable concrete slab and an air-permeable impermeable blanket sandwiched between the double-layer permeable concrete slab.

[0025] Optionally, the top of the outer water purification well cylinder, the middle water purification well cylinder, and the inner water purification well cylinder are covered with a cover plate.

[0026] Optionally, the distance between the water level in the water purification storage device and the top of the outer, middle, and inner water purification well cylinders is at least 150mm; this allows ammonia gas to diffuse out using the wick principle. Furthermore, the filling height of the water purification material in the second water purification well cylinder unit is higher than the water level.

[0027] Optionally, the water purification and storage device is located underground and below the frozen soil layer. During construction, a site is selected and a pit is excavated. The soil at the bottom of the pit is compacted, and the impermeable air base plate is laid on the compacted soil. Then, the water purification well assembly is arranged vertically on the impermeable air base plate.

[0028] Optionally, each wellbore unit has a regular hexagonal cross-section and is arranged in a honeycomb pattern on the impermeable gas base plate. The regular hexagonal honeycomb structure is the most stable and is not easily tilted or collapsed by external forces or geological changes.

[0029] (III) Beneficial Effects

[0030] The beneficial effects of this invention are as follows: This invention provides a water purification and storage device. By configuring an outer, middle, and inner water purification well cylinder, water entering the outer well cylinder is filtered layer by layer under pressure, allowing the purified water to be stored centrally inside the inner well cylinder for easy access. The inclusion of an impermeable air-sealed base plate and waterproof sidewalls prevents water from seeping to the bottom or outside; water can only flow inwards and is ultimately filtered and seeps into the inner well cylinder. Unlike traditional drinking water purification devices that require two separate systems (storage and purification), which are large and complex to construct, this device integrates water storage and purification within the same space, saving land.

[0031] In addition, no chemicals or aeration are needed during the rainwater purification process, and the subsequent operation and maintenance only require a very small amount of sludge removal costs, which greatly saves on water purification costs. Attached Figure Description

[0032] Figure 1 This is a top view of the water purification and storage device in Embodiment 1 of the present invention;

[0033] Figure 2 This is a longitudinal sectional view of the water purification and storage device in Embodiment 1 of the present invention.

[0034] [Attached image captions]

[0035] 1: First water purification well unit; 2: First connecting hole; 3: Second water purification well unit; 4: Water outlet pipe; 5: Sludge discharge well; 6: Third water purification well unit; 7: Second connecting hole; 8: Drainage well; 9: Waterproof layer; 10: Water inlet pipe; 11: Water inlet well; 12: Permeable concrete slab; 13: Breathable seepage-proof blanket; 14: Cover plate; 15: Fourth water purification well unit. Detailed Implementation

[0036] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0038] Example 1

[0039] refer to Figure 1-2 This embodiment provides a rapid water purification and storage device, which includes an impermeable air base plate and a water purification well assembly. The water purification well assembly includes an outer water purification well, a middle water purification well, and an inner water purification well. The outer, middle, and inner water purification wells are each composed of several well units. The several well units of the inner water purification well are located on the projected surface of the device and abut against each other. The several well units of the middle water purification well are arranged sequentially and closely around the inner water purification well. The several well units of the outer water purification well are arranged sequentially and closely around the middle water purification well. The middle water purification well abuts against both the outer and inner water purification wells.

[0040] The water purification well assembly has both water filtration and purification functions. The outer wall of the outer water purification well is provided with a waterproof layer 9, which is located away from the center of the device's projection surface. The anti-permeability air bottom plate is waterproof and breathable.

[0041] The water purification well assembly is placed on the impermeable air base plate, so that the water purification well assembly and the impermeable air base plate form a water storage and purification tank containing several well units; the several well units of the middle layer water purification well are filled with water purification material.

[0042] The outer water purification well is connected to the inlet water. The inlet water seeps into the middle water purification well from the side wall of the outer water purification well. After being purified by the middle water purification well, it seeps into the inner water purification well for further purification and storage.

[0043] The outer, middle, and inner water purification well casings of this invention are all composed of hexagonal honeycomb structures. The hexagonal honeycomb structure allows adjacent water purification well casings to abut against each other, distributing stress, interlocking, and resulting in a very stable structure. Each water purification well casing is an individual hexagonal honeycomb structure, facilitating installation and individual replacement.

[0044] The water purification well assembly of the present invention can release iron and aluminum metal ions, which can efficiently adsorb phosphorus in water and have a good phosphorus removal effect.

[0045] In this embodiment, the outer water purification well cylinder is formed by several first water purification well cylinder units 1 and several fourth water purification well cylinder units 15. The outer walls of adjacent first water purification well cylinder units 1 and fourth water purification well cylinder units 15 are closely connected to each other. A first connecting hole 2 is provided between the lower part of the side walls of adjacent first water purification well cylinder units 1 and fourth water purification well cylinder units 15, so that all the first water purification well cylinder units 1 and fourth water purification well cylinder units 15 of the outer water purification well cylinder are connected.

[0046] This embodiment, by setting up several first water purification well cylinder units and several fourth water purification well cylinder units, and providing a first connecting hole between adjacent first and fourth water purification well cylinder units, allows water entering the outer water purification well cylinder to quickly diffuse into each first and fourth water purification well cylinder unit. Each first water purification well cylinder unit can filter and purify the water, improving the water purification effect.

[0047] In this embodiment, at least one of the fourth water purification well cylinder units 15 is an inlet well 11. The fourth water purification well cylinder units 15 all have sludge collection and sludge discharge functions. The fourth water purification well cylinder unit 15 is equipped with a sludge discharge pump for discharging the sludge deposited in the outer water purification well cylinder.

[0048] No well casing unit is installed at the locations of the water inlet well 11 and the sludge discharge well 5;

[0049] The water inlet well 11 is connected to the water inlet pipe 10. The water first enters the water inlet well 11, and then enters the other first water purification well cylinder unit 1 and the fourth water purification well cylinder unit 15 through the first connecting hole 2.

[0050] refer to Figure 1 In this embodiment, the fourth water purification well unit 15 includes an inlet well 11 and a sludge discharge well 5, both of which are hollow areas, i.e., well units without hexagonal honeycomb structures. At the locations where the inlet well 11 and the sludge discharge well 5 are located, a row of hexagonal honeycomb structures is also provided on the outer side of the outer water purification well unit, thus creating hexagonal hollow areas at the inlet well 11 and the sludge discharge well 5. Of course, the additional row of hexagonal honeycomb structures can be omitted; placing a well-shaped structure at the locations of the inlet well 11 and the sludge discharge well 5 can also achieve the solution of this invention.

[0051] like Figure 1Preferably, an inlet well 11 and two sludge discharge wells 5 are respectively provided in the outer water purification well cylinder. The inlet well 11 is connected to the inlet pipe 10, so that the water first enters the inlet well 11, and then flows quickly into the adjacent first water purification well cylinder unit 1 and sludge discharge well 5 through the first connecting hole 2. Since there is sludge in the rainwater or other sewage, the sludge cannot pass through the side wall of the first water purification well cylinder unit and will be deposited in the inlet well 11, the first water purification well cylinder unit 1 and the sludge discharge well 5. If it is necessary to discharge the sludge, first stop the water intake, and then put the sludge discharge pump into the inlet well 11 and the sludge discharge well 5 to pump out the sludge. Since there is a first connecting hole 2, the sludge at the bottom of other first water purification well cylinder units 1 can also be discharged together. After the sludge is discharged, the pump is taken out.

[0052] In this embodiment, the middle-layer water purification well is formed by several second water purification well units 3 connected together. These independent second water purification well units 3 allow for better contact, enabling water to quickly penetrate into the inner-layer water purification well. Each second water purification well unit 3 is filled with water purification material, and the outer walls of adjacent second water purification well units 3 are tightly connected. The water purification material is one or more of activated carbon, pumice, maifanite, volcanic rock, porous ceramsite, and porous silica sand. Filling with these water purification materials effectively further purifies impurities in the water. When the water purification filler fails, it can be replaced and then reassembled into the water purification and storage device of this invention. Replacement is convenient and requires no large-scale construction. The filler has numerous micropores, serving as an excellent carrier for microbial attachment and exhibiting excellent adsorption performance for water pollutants.

[0053] Preferably, the height of the water purification material filled in the second water purification well unit 3 is higher than the water level. Due to its numerous micropores and excellent capillary action, a wick effect is generated, which can convert ionic ammonia into ammonia gas and diffuse it out. Therefore, this part of the water purification material above the water level in the second water purification well unit 3 constitutes a gas-liquid bridge (gas-liquid exchange).

[0054] In this embodiment, the inner water purification well cylinder is formed by several third water purification well cylinder units 6 connected together, and the outer walls of adjacent third water purification well cylinder units 6 are closely connected to each other; the interior of each third water purification well cylinder unit 6 can store and purify water; with the drainage well 8 located in the center, the third water purification well cylinder units 6 are arranged radially around the drainage well 8, and no well cylinder unit is set at the location of the drainage well 8 located in the center, and the drainage well 8 can also store water, and the drainage well 8 is connected to the water outlet pipe 4.

[0055] The drainage well 8 is a hollow area, that is, a well unit without hexagonal honeycomb structures. Of course, a well-shaped structure can also be placed in the location of the drainage well 8 to achieve the solution of the present invention.

[0056] In this embodiment, several third water purification well cylinder units 6 are set up. After the third water purification well cylinder units 6 are connected, a drainage well 8 is formed in the center. The drainage well 8 can store the water seeping out of the third water purification well cylinder units 6. At the same time, each third water purification well cylinder unit 6 can also store filtered water. When a large amount of water is drawn from the drainage well 8, the water stored in the third water purification well cylinder units 6 can quickly seep into the drainage well 8 to achieve rapid supply.

[0057] In one specific embodiment, a second connecting hole 7 is provided between the lower part of the sidewall of adjacent third water purification well cylinder units 6, so that all the third water purification well cylinder units 6 in the inner layer of the water purification well cylinder are connected. In this embodiment, the second connecting pipe 7 is provided to ensure that the water level in each third water purification well cylinder unit 6 is consistent, which is convenient for water storage and purification, and also facilitates water seepage into the drainage well 8.

[0058] Preferably, the first water purification well unit 1, the second water purification well unit 3, and the third water purification well unit 6 can all be Figure 1 The three hexagonal structures shown are all made of silica sand honeycomb from desert aeolian sand, which can exert a variety of comprehensive purification effects on water bodies, bringing them to drinking water quality. In one specific embodiment, the drainage well 8 is also connected to surface water facilities.

[0059] In this embodiment, the impermeable air base plate includes a double-layer permeable concrete slab 12 and an air-permeable impermeable blanket 13 sandwiched between the double-layer permeable concrete slab 12.

[0060] The impermeable air base plate of this embodiment has the function of being breathable and waterproof, allowing outside air to enter the water purification and storage device, increasing dissolved oxygen in the water, preventing water deterioration, and also preventing water from flowing out of the device.

[0061] In this embodiment, the tops of the outer, middle, and inner water purification well cylinders are covered with cover plates 14. The cover plates 14, located at the top, prevent water from seeping into the device and contaminating the filtered water.

[0062] In this embodiment, the distance between the water level in the water purification storage device and the top of the outer, middle and inner water purification well cylinders is at least 150mm; and the filling height of the water purification material in the second water purification well cylinder unit 3 is higher than the water level.

[0063] In this embodiment, the water purification and storage device is located underground and below the frozen soil layer. During construction, a site is selected and a pit is excavated. The soil at the bottom of the pit is compacted, and an impermeable air base plate is laid on the compacted soil. Then, the water purification well assembly is arranged vertically on the impermeable air base plate.

[0064] Example 2

[0065] The rainwater purification effect was experimentally verified using the water purification and storage device in Example 1. The filler material in the second water purification well was activated carbon, pumice, and porous silica sand added in a mass ratio of 1:1:2.

[0066] The water level in the water purification storage device is 150mm away from the top of the outer, middle and inner water purification well cylinders. The filling height of the water purification material in the second water purification well cylinder unit is higher than the water level. The water level in the control group is 130mm away from the top of the outer, middle and inner water purification well cylinders.

[0067] Rainwater is continuously pumped from the inlet pipe into the inlet well. The rainwater quickly flows through the first connecting hole into each of the first purification well cylinders. Under increasing inlet pressure, the water in the first purification well cylinder diffuses through its sidewalls. It then seeps into the second purification well cylinder through the honeycomb sidewalls of the first purification well cylinder, achieving the first stage of rainwater purification. Similarly, the rainwater undergoes a second purification in the second purification well cylinder, and then a third purification in the third purification well cylinder, finally being collected in the drainage well at the center of the purified water outlet device. When drinking water is needed, a water pump can be placed in the drainage well and connected to the surface water supply facility to extract the purified water. As the pump draws water, water from the third purification well cylinder continues to seep into the drainage well, allowing for a continuous water supply.

[0068] The results showed that the initial value of the rainwater was 4.318 mg / L. After being treated by the water purification and storage device of the present invention for 7 days, the water taken out of the drainage well had an ammonia nitrogen (calculated as N) content of less than 0.025 mg / L, which met the drinking water standards.

[0069] In the control group of this embodiment, because the height difference between the water level and the top of the water purification well assembly is small, the gas-liquid bridge formed by the water purification material in the second water purification well unit 3 is short (small surface area), the aeration effect is poor, the volatilization effect of ammonia nitrogen in the water is insufficient, and the water body cannot be purified well. After 7 days of treatment, the ammonia nitrogen value of the water body is 0.62 mg / L, which does not meet the standard for drinking.

[0070] In addition, the present invention conducted component analysis on the water after 7 days of treatment. The results showed that the content of harmful pathogens, heavy metals, and harmful substances in the water was far below the drinking water standard limit, and could meet the drinking standard.

[0071] The water purification well assembly in the water purification and storage device of this invention is a porous media functional packing column. It can precipitate 3CaO·SiO2 and other substances in water, and undergo a hydration reaction to increase the pH value of the water. The porous packing column exposed above the water surface acts as a "gas-liquid bridge" and an interfacial multiphase catalyst. A large amount of capillary water rises to the surface, and the ammonia nitrogen and hydroxide ions carried in the water overcome the surface tension of the water and come into contact with the flowing air, rapidly converting into ammonia gas that diffuses into the atmosphere. At the gas-liquid interface, the ammonia nitrogen and hydroxide ions in the water continuously diffuse towards the atmosphere along the capillaries due to the concentration difference, producing a wicking effect of ammonia nitrogen diffusion. This is a mass transfer process, conforming to Henry's law. However, in a static state, the surface tension and concentration balance of the water hinder the continuous diffusion of ammonia nitrogen across the liquid surface into the atmosphere. Furthermore, the silica sand packing column of this invention can store water underground at a constant temperature and provide natural aeration, eliminating the need for an aeration device. The water purification and storage device of this invention can be used to purify rainwater from roofs and roads, and can also be used as a storage for drinking water.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water purification and storage device, characterized in that, The device includes an impermeable gas base plate and a water purification well assembly. The water purification well assembly includes an outer water purification well, a middle water purification well, and an inner water purification well. The middle water purification well abuts against the outer and inner water purification wells, respectively. The outer wall of the outer water purification well, away from the center of the device's projection plane, is provided with a waterproof layer. The water purification well assembly is mounted on the impermeable gas base plate. The outer water purification well cylinder is formed by several first water purification well cylinder units (1) and several fourth water purification well cylinder units (15); the fourth water purification well cylinder unit (15) includes an inlet well (11) and a sludge discharge well (5); a first connecting hole (2) is provided between the lower part of the side wall of adjacent first water purification well cylinder units (1) and fourth water purification well cylinder units (15) to connect all the first water purification well cylinder units (1) and fourth water purification well cylinder units (15) of the outer water purification well cylinder; The middle-layer water purification well cylinder is formed by several second water purification well cylinder units (3) connected together, and each second water purification well cylinder unit (3) is filled with water purification material; The inner water purification well cylinder is formed by several third water purification well cylinder units (6); the drainage well (8) is located in the center, and the third water purification well cylinder units (6) are arranged around the drainage well (8) in a radial manner. The first water purification well unit (1), the second water purification well unit (3) and the third water purification well unit (6) are all made of silica sand honeycomb using desert aeolian sand as raw material; The distance between the water level in the water purification storage device and the top of the outer water purification well, the middle water purification well, and the inner water purification well is at least 150 mm; and the filling height of the water purification material in the second water purification well unit (3) is higher than the water level. The water inlet well (11) is connected to the water inlet pipe (10), so that the water first enters the water inlet well (11), and then flows into the adjacent first water purification well cylinder unit (1) and the sludge discharge well (5) through the first connecting hole (2); Water seeps into the second water purification unit (3) from the side wall of the first water purification unit (1), and after being purified by the second water purification unit (3), it seeps into the third water purification unit (6) for further purification and storage. The water in the third water purification unit (6) continues to seep into the drainage well (8), and the water in the drainage well (8) meets the drinking water standard.

2. The water purification and storage device according to claim 1, characterized in that, The outer walls of the adjacent first water purification well unit (1) and the fourth water purification well unit (15) are closely connected to each other.

3. The water purification and storage device according to claim 2, characterized in that, The fourth water purification well unit (15) has sludge collection and sludge discharge functions, and the fourth water purification well unit (15) is equipped with a sludge discharge pump.

4. The water purification and storage device according to claim 1, characterized in that, The outer walls of adjacent second water purification well units (3) are closely connected to each other; the water purification material is one or more of activated carbon, pumice, maifanite, volcanic rock, porous ceramsite and porous silica sand; The outer walls of the adjacent third water purification well units (6) are connected closely to each other; each third water purification well unit (6) can store and purify water inside; no well unit is set at the location of the drainage well (8) in the center, and the drainage well (8) is connected to the water outlet pipe (4).

5. The water purification and storage device according to claim 4, characterized in that, A second connecting hole (7) is provided between the lower part of the side wall of the adjacent third water purification well cylinder unit (6) so that all the third water purification well cylinder units (6) of the inner water purification well cylinder are connected. The drainage well (8) is also connected to the surface water facilities.

6. The water purification and storage device according to claim 1, characterized in that, The impermeable air-sealed base plate includes a double-layer permeable concrete slab (12) and an air-permeable impermeable blanket (13) sandwiched between the double-layer permeable concrete slab (12).

7. The water purification and storage device according to any one of claims 1-6, characterized in that, The top of the outer water purification well cylinder, the middle water purification well cylinder, and the inner water purification well cylinder are covered with a cover plate (14).

8. The water purification and storage device according to claim 1, characterized in that, The water purification and storage device is located underground and below the frozen soil layer. During construction, a site is selected and a pit is dug. The soil at the bottom of the pit is compacted. The impermeable air base plate is laid on the compacted soil, and then the water purification well cylinder assembly is arranged vertically on the impermeable air base plate.

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