Multi-stage purification system for drinking natural water based on filter core grading adapting to different mineral structures

Abstract

The application relates to the technical field of natural drinking water purification, and discloses a multi-stage natural drinking water purification system based on filter core hierarchical adaptation to different mineral structures, which comprises a treatment box composed of a box body with left and right water storage compartments and a cover plate, a filter body is arranged on the front side of the treatment box, a flow guide plate is arranged on the rear side of the inner wall of the left water storage compartment, a flow limiting base is jointly arranged on the bottom end inner wall of the left water storage compartment and the flow guide plate, and a flocculation tank is arranged on the upper end of the flow limiting base. The multi-stage natural drinking water purification system based on filter core hierarchical adaptation to different mineral structures can effectively solve the problems in the prior art that the traditional multi-stage natural water purification system cannot be graded and controlled according to the alum flower formation characteristics of the natural water mineral structure, the filter core utilization rate and service life are reduced due to insufficient flocculation, the adsorption filter core cannot be hierarchically adapted to the natural water mineral structure and the flocculated water characteristics, and the fixed configuration cannot simultaneously consider the targeted purification and the selective retention of beneficial minerals.

Description

Technical Field

[0001] This invention relates to the field of drinking natural water purification technology, specifically to a multi-stage purification system for drinking natural water based on filter element grading and adaptation to different mineral structures. Background Technology

[0002] Natural water sources encompass various types, including spring water, underground mineral water, and surface natural water, with significant differences in their mineral structure. Traditional drinking water purification systems often employ a standardized treatment model with a fixed process path: "pretreatment - flocculation reaction - multi-media filtration - activated carbon adsorption - terminal disinfection." Among these, the flocculation reaction unit is the core pretreatment barrier at the front end of the entire process, directly determining the influent load and operational stability of the subsequent multi-stage filtration and adsorption filter cartridges. The multi-media filtration / activated carbon adsorption unit is the core purification terminal of the entire process, directly determining the safety of the effluent water and the retention effect of natural minerals. The synergy and matching degree between the two is the core key to determining the operating efficiency, maintenance costs, and effluent quality of the entire purification system.

[0003] To address this issue, this application designs a multi-stage purification system for drinking natural water based on filter cartridges adapted to different mineral structures. Most existing multi-stage purification systems for natural water employ flocculation reaction facilities with fixed pool types, stirring intensities, and hydraulic retention times. These systems fail to classify and control the floc formation characteristics of natural water with different mineral structures. Insufficient flocculation leads to a large amount of colloidal and macromolecular organic matter penetrating to the downstream end, clogging the micropores of the adsorption medium and occupying effective adsorption sites, resulting in a significant decrease in filter cartridge adsorption capacity utilization and a markedly shortened service life. Furthermore, existing adsorption filter cartridges lack the ability to be graded and adapted based on the mineral structure of natural water and the characteristics of the flocculated effluent from the upstream end. Fixed configurations cannot simultaneously achieve targeted purification and selective retention of minerals. For natural water with excessive minerals of different characteristics, either the targeted removal capacity is insufficient, posing a water quality safety risk, or the configuration is over-configured, resulting in the large-scale interception of beneficial natural minerals. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a multi-stage purification system for drinking natural water based on filter cartridges adapted to different mineral structures. This system effectively solves the problems of existing multi-stage purification systems that fail to classify and control floc formation according to the mineral structure of natural water. Insufficient flocculation allows colloidal and macromolecular organic matter to penetrate the downstream end, clogging the micropores of the adsorption medium, competing for adsorption sites, and reducing filter cartridge utilization and lifespan. Furthermore, existing adsorption filter cartridges cannot be graded and adapted according to the mineral structure of natural water and the characteristics of flocculated effluent. Fixed configurations struggle to balance targeted purification with selective retention of beneficial minerals. For natural water with varying levels of mineral content, this can lead to insufficient purification posing safety risks or excessive removal resulting in the loss of beneficial minerals.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a multi-stage purification system for drinking natural water based on filter element grading and adaptation to different mineral structures, comprising: The treatment box consists of a box body with two water storage compartments on the left and right sides and a cover plate. The filter body is set on the front side of the treatment box. A guide plate is installed on the rear side of the inner wall of the left water storage compartment. A flow-limiting base is installed on the bottom inner wall of the left water storage compartment and the guide plate. The flow-limiting base has a U-shaped structure. A flocculation tank is installed on the upper end of the flow-limiting base. A flocculation reaction section is set on both the treatment box and the flocculation tank. A partition plate is symmetrically installed on the inner wall of the right water storage compartment. An adsorption section is set on both the treatment box and the partition plate. The flocculation reaction section includes a reflector plate installed on the inner wall of the left water storage tank above the flocculation tank. An overflow plate is installed on the inner wall of the left water storage tank above the reflector plate to stabilize the natural water level in the left water storage tank and automatically overflow when the water level is too high. The overflow plate consists of an annular plate with a toothed structure at the top and a rectangular sleeve plate fixedly fitted on the outer wall of the annular plate. A wing is provided on the inner wall of the flocculation tank. An adjustment group is provided on both the treatment box and the flocculation tank. The adsorption unit includes a flow equalization plate installed on the inner wall of the right water storage tank and on the front and rear partitions. Several flow equalization plates are provided. An adsorption box is provided in the right water storage tank. A membrane cleaning unit is provided on the treatment box and the adsorption boxes on the front and rear sides.

[0006] Furthermore, the flocculation reaction section also includes a guide plate installed at the upper end of the flow-limiting base. The guide plate is fixedly sleeved on the outer wall of the flocculation tank. A rotating shaft is rotatably installed on the inner wall of the bottom end of the left water storage tank. Several circumferentially evenly distributed receiving cavities are opened on the inner wall of the bottom end of the flocculation tank. Several gears distributed from top to bottom are rotatably installed on the inner wall of the receiving cavities. Several blades are provided. Several blades are rotatably installed on the inner wall of the flocculation tank through short shafts. The short shafts on the blades are fixedly connected to the corresponding gears.

[0007] Furthermore, the adsorption unit also includes an elastic unblocking net installed inside the adsorption box located on the upper side. An electromagnetic vibrator is installed on the upper end of the cover plate, and a transmission rod that slides through the cover plate is symmetrically installed on the lower end of the electromagnetic vibrator. The lower end of the transmission rod is fixedly connected to the elastic unblocking net. Supports are slidably installed through the upper ends of the flow equalization plates on both the left and right sides. The support consists of a horizontal plate and two sliding rods on the left and right sides. Each group of adsorption boxes is provided with several of them. One adsorption box is located on the upper side of the flow equalization plate, and the rest of the adsorption boxes are located on the lower side of the flow equalization plate and are evenly distributed from top to bottom.

[0008] Furthermore, the regulating group includes sealing plates installed at the lower end of the flocculation tank corresponding to several receiving cavities. Racks are slidably installed on the inner wall of the receiving cavities corresponding to the sealing plates. The racks mesh with several corresponding gears simultaneously. A connecting plate is installed at the lower end of several racks. The connecting plate has a ring structure. Electric push rods are symmetrically installed on the left and right sides of the lower end of the treatment box. The telescopic end of the electric push rod slides through the treatment box and is fixedly connected to the connecting plate.

[0009] Furthermore, the membrane cleaning assembly includes several support plates symmetrically installed on the inner walls of several adsorption boxes located below the flow equalization plate. An elastic diaphragm is provided between the upper and lower support plates. The elastic diaphragm is composed of an arc-shaped diaphragm and an extension plate that are symmetrically distributed vertically. The left and right ends of the arc-shaped diaphragm are gapped against the inner wall of the adsorption box. The left and right ends of the extension plate and the end away from the arc-shaped diaphragm are gapped against the inner wall of the adsorption box. The upper end of the extension plate is provided with rectangular through holes and injection holes that are evenly distributed from left to right.

[0010] Furthermore, the membrane cleaning unit also includes symmetrically integrated pressing rods installed on the upper end of the arc-shaped diaphragm. The pressing rods slide through the corresponding adsorption boxes. The lowermost pressing rod is a cylindrical structure with its opening facing upwards, while the remaining pressing rods are hollow rod structures. A support shaft is slidably installed on the inner wall of several pressing rods. The support shaft passes through the corresponding support plate and the elastic diaphragm. A pressure plate is fixedly sleeved on the outer wall of the support shaft above each pressing rod. The lower end of the pressure plate is connected to the corresponding adsorption box through a compression spring, and the upper end of the uppermost pressure plate is fixedly connected to the corresponding bracket.

[0011] Furthermore, a drive shaft is rotatably installed at the right end of the processing box corresponding to the bracket position. Cams are symmetrically fixed on the outer wall of the drive shaft, and the outer wall of the cam rolls in contact with the corresponding bracket. The two drive shafts are connected at the right end by a drive belt. An intermittent motor for driving the front drive shaft is installed at the right end of the processing box.

[0012] Furthermore, the upper end of the rotating shaft rotates through the cover plate, and a servo motor for driving the rotating shaft to rotate is installed at the upper end of the cover plate. A turbine propeller is fixedly sleeved in the middle of the outer wall of the rotating shaft, and a mixing propeller is fixedly sleeved at the lower end of the outer wall of the rotating shaft.

[0013] Furthermore, the upper left side of the outer wall at both ends of the treatment box is connected to a drain pipe and a water injection pipe, respectively. The lower left side of the rear end of the treatment box is connected to several addition pipes, and the lower left side of the treatment box is connected to an addition pipe. The treatment box, the flow-limiting base, and the guide inclined plate are all connected to a sludge discharge pipe. The upper and lower right ends of the treatment box are symmetrically connected to multi-directional conveying pipes.

[0014] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a multi-stage purification system for drinking natural water based on filter element grading and adaptation to different mineral structures. In the grading and adaptation flocculation reaction stage, natural water and chemicals undergo initial mixing at the bottom of the flocculation tank. A mixing paddle performs high-intensity shear mixing on the natural water and chemicals at the bottom of the flocculation tank, ensuring full contact between the chemicals and mineral ions and colloidal particles in the natural water, completing the initial coagulation reaction. Simultaneously, the turbine paddle drives the natural water upwards, forming a graded turbulent flow field in conjunction with pre-angled blades. The blade surface has several linearly uniformly distributed arc-shaped grooves that generate controllable micro-vortices as water flows through, enhancing mass transfer and diffusion between the chemicals and natural water. The flexible rubber layer on the outer edge of the blades forms a buffer collision surface, promoting micro-floc collision while preventing floc breakage, allowing the initially formed micro-flocs to continuously circulate within the turbulent flow field. Collision and growth form dense flocs. Through the upper and lower staged stirring of the mixing impeller and turbine impeller, a staged reaction environment of "high-intensity mixing and coagulation at the bottom + stable turbulent floc growth in the middle" is constructed. The arc-shaped grooves on the surface of the blades can generate controllable micro-vortices, improve the diffusion efficiency of the agent in the water, shorten the agent mixing time, and reduce the agent dosage. In addition, the adjustable blades form an adaptive turbulent field, which can adjust the turbulence angle of the blades for different water qualities, and adapt to natural water with different minerals and turbidity. This allows for staged control of the floc formation characteristics of natural water with different mineral structures, avoiding the problem of insufficient flocculation leading to a large amount of colloidal and large molecular organic matter penetrating to the back end, clogging the micropores of the adsorption medium, and seizing effective adsorption sites, resulting in a significant decrease in the adsorption capacity utilization rate of the filter element and a significant shortening of its service life.

[0015] In the stage of graded and adaptive deep adsorption purification, the natural water, after initial adsorption, flows from top to bottom through multiple sets of adsorption boxes on the lower side. Through the exclusive graded adsorption packing material corresponding to the type of natural water in each adsorption box, targeted deep purification is completed, achieving graded adaptation with the pre-flocculation pretreatment. By matching graded adsorption packing material customized for natural water with different mineral structures, a precise adaptation is formed with the pre-flocculation graded treatment. It can achieve graded adaptation capability based on the mineral structure of natural water and the characteristics of the effluent from the front end of flocculation, achieving targeted purification. It can not only remove harmful impurities in natural water in a targeted manner, but also accurately retain beneficial minerals in natural water. It avoids the problems of "over-purification and loss of minerals" or "incomplete purification and substandard water quality" in traditional general purification processes, and significantly improves the purification quality and drinking safety of natural drinking water. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of a partial three-dimensional cross-section in an embodiment of the present invention; Figure 3 This is a schematic diagram of a partial three-dimensional cross-section of the treatment tank and flocculation tank in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the flow-limiting base and the flocculation reaction section in an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the winglet, gear, and adjustment assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional separation of the flocculation tank, guide plate, and reflector plate in an embodiment of the present invention; Figure 7 This is a schematic diagram of a partial three-dimensional cross-section of the processing box and the adsorption unit in an embodiment of the present invention; Figure 8 This is a schematic diagram of the three-dimensional separation of the adsorption box, elastic drainage net, and electromagnetic vibrator in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the adsorption section in an embodiment of the present invention; Figure 10 This is a schematic diagram of a partial three-dimensional cross-section of the membrane clearing assembly in an embodiment of the present invention. Figure 11 For the present invention Figure 10 A magnified structural diagram of part X in the middle.

[0018] The labels in the diagram represent: 1. Treatment tank; 11. Water injection pipe; 12. Drainage pipe; 13. Sludge discharge pipe; 14. Addition pipe one; 15. Addition pipe two; 16. Multi-directional conveying pipe; 2. Filter body; 3. Guide plate; 4. Flow limiting base; 5. Flocculation tank; 6. Flocculation reaction section; 61. Guide ramp; 62. Reflector plate; 63. Overflow plate; 64. Rotating shaft; 641. Servo motor; 642. Turbine propeller; 643. Mixing propeller; 65. Receiving cavity; 66. 67. Wing; 68. Gear; 69. Adjustment group; 60. Sealing plate; 61. Rack; 62. Connecting plate; 63. Electric push rod; 7. Partition; 80. Adsorption section; 81. Flow equalization plate; 82. Adsorption box; 83. Elastic unblocking net; 831. Electromagnetic vibrator; 84. Support; 841. Cam; 842. Intermittent motor; 85. Membrane cleaning group; 851. Support plate; 852. Elastic diaphragm; 853. Pressing rod; 854. Support shaft; 855. Pressure plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example: Please see Figures 1-11 This invention provides a technical solution: a multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures, comprising: Treatment box 1 consists of a box body with two water storage chambers on the left and right sides and a cover plate. A filter body 2 is set on the front side of treatment box 1. A guide plate 3 is installed on the rear side of the inner wall of the left water storage chamber. A flow-limiting base 4 is installed on the bottom inner wall of the left water storage chamber and the guide plate 3. The flow-limiting base 4 has a U-shaped structure. A flocculation tank 5 is installed on the upper end of the flow-limiting base 4. A flocculation reaction section 6 is set on both treatment box 1 and flocculation tank 5. A partition plate 7 is symmetrically installed on the inner wall of the right water storage chamber. An adsorption section 8 is set on both treatment box 1 and partition plate 7. The flocculation reaction section 6 includes a reflector plate 62 installed on the inner wall of the left water storage tank above the flocculation tank 5. The reflector plate 62 is composed of several mounting plates and conical plates evenly distributed in a circle. An overflow plate 63 is installed on the inner wall of the left water storage tank above the reflector plate 62 to stabilize the natural water level in the left water storage tank and automatically overflow when the water level is too high. The overflow plate 63 is composed of an annular plate with a toothed structure at the upper end and a rectangular sleeve plate fixedly fitted on the outer wall of the annular plate. A wing 66 is provided on the inner wall of the flocculation tank 5. An adjustment group 68 is provided on both the treatment box 1 and the flocculation tank 5. The adsorption unit 8 includes a flow equalization plate 81 installed on the inner wall of the right water storage tank and on the front and rear partitions 7. There are several flow equalization plates 81, which are evenly distributed from front to back. An adsorption box 82 is installed in the right water storage tank. A membrane cleaning group 85 is installed on the treatment box 1 and the adsorption boxes 82 on the front and rear sides.

[0022] The flocculation reaction section 6 also includes a guide plate 61 installed on the upper end of the flow-limiting base 4. The guide plate 61 is fixedly sleeved on the outer wall of the flocculation tank 5. A rotating shaft 64 is rotatably installed on the inner wall of the bottom end of the left water storage tank. Several circumferentially evenly distributed receiving cavities 65 are opened on the inner wall of the bottom end of the flocculation tank 5. Several gears 67 distributed from top to bottom are rotatably installed on the inner wall of the receiving cavity 65. Several blades 66 are provided. Several blades 66 are rotatably installed on the inner wall of the flocculation tank 5 through short shafts. The short shafts on the blades 66 are fixedly connected to the corresponding gears 67. Several linearly evenly distributed arc-shaped grooves are opened on the surface of the blades 66.

[0023] The adsorption unit 8 also includes an elastic drainage net 83 installed in the adsorption box 82 located on the upper side. An electromagnetic vibrator 831 is installed on the upper end of the cover plate. A transmission rod that slides through the cover plate is symmetrically installed on the lower end of the electromagnetic vibrator 831. The lower end of the transmission rod is fixedly connected to the elastic drainage net 83. A bracket 84 is slidably installed on the upper end of the flow equalization plates 81 on both the left and right sides. The bracket 84 consists of a horizontal plate and two sliding rods on the left and right sides. Each set of adsorption boxes 82 is provided with several of them. One adsorption box 82 is located on the upper side of the flow equalization plate 81, and the remaining adsorption boxes 82 are located on the lower side of the flow equalization plate 81 and are evenly distributed from top to bottom.

[0024] The regulating group 68 includes sealing plates 681 installed at the lower end of the flocculation tank 5 corresponding to several receiving cavities 65. A rack 682 is slidably installed on the inner wall of the receiving cavity 65 corresponding to the sealing plate 681. The rack 682 meshes with several corresponding gears 67 at the same time. A connecting plate 683 is installed at the lower end of several racks 682. The connecting plate 683 has a ring structure. Electric push rods 684 are symmetrically installed on the left and right sides of the lower end of the treatment box 1. The telescopic end of the electric push rod 684 slides through the treatment box 1 and is fixedly connected to the connecting plate 683.

[0025] The membrane cleaning unit 85 includes several support plates 851 symmetrically installed on the inner walls of adsorption boxes 82 located below the flow equalization plate 81. The support plates 851 have an arc-shaped structure. An elastic diaphragm 852 is provided between the upper and lower support plates 851. The elastic diaphragm 852 is composed of an arc-shaped diaphragm and an extension plate that are symmetrically distributed vertically. The left and right ends of the arc-shaped diaphragm are gapped against the inner wall of the adsorption box 82. The left and right ends of the extension plate and the end away from the arc-shaped diaphragm are gapped against the inner wall of the adsorption box 82. The upper end of the extension plate is provided with rectangular through holes and injection holes that are evenly distributed from left to right.

[0026] The membrane cleaning assembly 85 also includes pressing rods 853 symmetrically and integrally installed on the upper end of the arc-shaped diaphragm. The pressing rods 853 slide through the corresponding adsorption box 82. The lowermost pressing rod 853 is a cylindrical structure with the opening facing upwards, while the remaining pressing rods 853 are hollow rod structures. A support shaft 854 is slidably installed on the inner wall of several pressing rods 853. The support shaft 854 passes through the corresponding support plate 851 and the elastic diaphragm 852. A pressure plate 855 is fixedly sleeved on the outer wall of the support shaft 854 above each pressing rod 853. The lower end of the pressure plate 855 is connected to the corresponding adsorption box 82 through a compression spring, and the uppermost pressure plate 855 is fixedly connected to the corresponding bracket 84.

[0027] A drive shaft is rotatably mounted on the right end of the processing box 1, corresponding to the position of the bracket 84. Cams 841 are symmetrically fixed on the outer wall of the drive shaft. The outer wall of the cams 841 rolls in contact with the corresponding bracket 84. The two drive shafts are connected at the right end by a drive belt. An intermittent motor 842 for driving the front drive shaft to rotate is installed on the right end of the processing box 1.

[0028] The upper end of the rotating shaft 64 rotates through the cover plate. A servo motor 641 for driving the rotating shaft 64 is installed on the upper end of the cover plate. A turbine propeller 642 is fixedly sleeved in the middle of the outer wall of the rotating shaft 64, and a mixing propeller 643 is fixedly sleeved in the lower end of the outer wall of the rotating shaft 64.

[0029] The upper left side of the outer wall at both ends of the treatment box 1 is connected to a drain pipe 12 and a water injection pipe 11, respectively. The lower left side of the rear end of the treatment box 1 is connected to several addition pipes 14. The lower left side of the treatment box 1 is connected to an addition pipe 15. The treatment box 1, the flow limiting base 4 and the guide inclined plate 61 are connected to a sludge discharge pipe 13. The right end of the treatment box 1 is symmetrically connected to multi-directional conveying pipes 16.

[0030] In practice: First, the filter body 2 in this application corresponds to the purification path of multi-media filtration in the natural water purification process. The flocculation reaction section 6 is used for graded regulation of flocculation of natural water with different mineral structures, and the adsorption section 8 is used for graded regulation of adsorption of natural water with different mineral structures. It should be noted that natural water can be divided into three categories: high-hardness flocculated natural water, high-organic-matter flocculated natural water, and low-turbidity, high-mineralization spring water. In this application, the right-side water storage tank of the treatment box 1 is divided into adsorption chambers corresponding to the three types of natural water by two partitions 7. The chambers are arranged in the front and rear directions as follows: front adsorption chamber, middle adsorption chamber, and rear adsorption chamber. The system comprises several adsorption chambers, with the front adsorption chamber containing several adsorption boxes 82 corresponding to high-hardness flocculated natural water, the rear adsorption chamber containing several adsorption boxes 82 corresponding to high-organic-matter flocculated natural water, and the middle adsorption chamber containing several adsorption boxes 82 corresponding to low-turbidity, high-mineralization spring water. Each adsorption box 82 is filled with graded adsorption packing material adapted to the corresponding type of natural water, forming a precise match with the pre-flocculation and grading treatment. Furthermore, the uppermost adsorption boxes 82 can be filled with conventional activated carbon particles. For the lower adsorption boxes 82, the following combinations can be used according to the order of filling the adsorption materials from top to bottom: High-hardness flocculated natural water: modified zeolite + quartz sand — coarse-grained coconut shell activated carbon — lightweight ceramsite; High-organic-matter flocculated natural water: fruit shell carbon + diatomaceous earth — three-stage gradient coconut shell activated carbon — silver-loaded activated carbon; Low-turbidity, high-mineralization mountain spring water: maifanite — homogeneous coconut shell activated carbon — activated alumina microspheres.

[0031] It should be noted that the filter body 2 is connected to the drain pipe 12 and the upper multi-directional conveying pipe 16 via two connecting pipes. Natural water first undergoes flocculation in the flocculation tank 5. After flocculation, the mud-water mixture flows out from the upper opening of the flocculation tank 5. After being decelerated and reflected by the reflector plate 62, large flocs settle under gravity and are guided and enriched in the sludge accumulation area by the guide plate 61. The water that has undergone preliminary settling flows upward to the overflow plate 63, where it completes the steady flow overflow and secondary solid-liquid separation. The resulting clear supernatant overflows through the overflow plate 63 and is then discharged into the filter body 2 through the drain pipe 12 on the upper left side of the treatment tank 1 for filtration. After filtration, the natural water flows to the corresponding adsorption chamber through the upper multi-directional conveying pipe 16. In addition, several addition pipes 14 can be used to add flocculants, and addition pipes 15 can be used to add coagulants. The multi-directional delivery pipe 16 is equipped with four-way valves corresponding to several branch pipes. The upper multi-directional delivery pipe 16 can control the water flow to be directionally delivered to the corresponding adsorption chamber. The lower multi-directional delivery pipe 16 can control the purified water flow in the three adsorption chambers to be discharged through fixed pipes. Specifically, the upper multi-directional delivery pipe 16 is installed on the upper right side of the treatment tank 1. It is connected to the upper inlet of the three adsorption chambers through branch pipes. The four-way valve on the upper multi-directional delivery pipe 16 can control the water flow to be directionally delivered to the corresponding adsorption chamber. The lower multi-directional delivery pipe 16 is installed on the lower right side of the treatment tank 1. It is connected to the lower outlet of the three adsorption chambers through branch pipes. The four-way valve on the lower multi-directional delivery pipe 16 can control the purified water flow in the three adsorption chambers to be discharged through fixed pipes to the finished water storage pipe. Drainage outlets can be provided on the side walls of the treatment tank 1 corresponding to several adsorption chambers, and a reverse flushing interface can be reserved.

[0032] In the natural water adaptation preset stage, based on the water quality test results of the natural water to be treated, the type of natural water is determined, and the four-way valve on the upper multi-directional conveying pipe 16 is adjusted accordingly. The water inlet path of the upper multi-directional conveying pipe 16 is preset to be connected to the target adsorption chamber, and the water outlet path of the lower multi-directional conveying pipe 16 is connected to the finished water storage pipeline.

[0033] The flocculation reaction parameters are pre-adjusted. Based on the turbidity and mineral ion content of the natural water, the initial angles of several vanes 66 in the flocculation tank 5 are pre-adjusted by the adjustment group 68. This facilitates the adjustment of the turbulence angle of the vanes 66 for different water qualities in the subsequent flocculation stage, so as to achieve the effect of graded adaptation to different water quality characteristics. It should be noted that the vanes 66 are initially in a vertical state. A flexible rubber layer can be added to the outer edge of the vanes 66 to form a buffer collision surface to prevent the flocs from breaking when they collide at high speed. The flexible rubber buffer collision surface can enhance the collision and growth of flocs while preventing the flocs from colliding and breaking under high-speed water flow.

[0034] The operation steps for adjusting the turbulence angle of the vane 66 are as follows: First, the two electric push rods 684 on the left and right sides are used to control the annular connecting plate 683 to move upward. The connecting plate 683 will simultaneously drive several racks 682 to slide upward synchronously along the corresponding sealing plate 681. The racks 682 will drive several gears 67 meshing with them to rotate synchronously at a suitable angle. The gears 67 will drive the vane 66 to rotate at a suitable angle through the short shaft until the included angle between the vane 66 and the radial direction of the flocculation tank 5 is adjusted to the preset required matching angle. Through the synchronous drive of the adjustment group 68, the precise and consistent adjustment of the angle of several vanes 66 can be achieved. The optimal hydraulic turbulence conditions can be preset for natural water with different minerals and turbidity, providing a suitable flocculation environment for the subsequent flocculation reaction. This solves the defects of traditional flocculation equipment with fixed turbulence and inability to adapt to water quality fluctuations, further improving the generation rate of dense flocs. The pre-stage and adapted flocculation parameters can be customized for the influent water quality of subsequent multi-stage adsorption filter cartridges, greatly reducing the pollution load of the downstream adsorption unit.

[0035] Specifically, for high-hardness natural water: the colloids are mainly calcium and magnesium carbonate / hydroxide colloids. Flocs form quickly but are brittle and easily broken by strong turbulence. The radial angle between vane 66 and flocculation tank 5 is 15 degrees (slanted in the direction of water flow), creating a moderate-intensity turbulence field. This enhances the collision and growth of micro-flocs while preventing strong shear forces from breaking the brittle flocs. For high-organic-content natural water: the colloids are mainly humic substances and large-molecule organic colloids. Flocs form slowly, are light and loose, and do not settle easily. A high-intensity turbulence field is needed to enhance the mass transfer contact between the agent and the colloids, promoting the continuous aggregation and growth of micro-flocs. The radial angle between vane 66 and flocculation tank 5... The angle is 30 degrees, forming a high-intensity, fully covered turbulent field, enhancing mass transfer diffusion and floc collision, and adapting to the growth characteristics of loose organic flocs; Low-turbidity, high-mineralization spring water: with very low colloidal particle content and high mineralization, the core pollutants are trace amounts of ionic fluorine and heavy metals, rich in beneficial mineral elements, difficult floc formation, and extremely low probability of micro-floc collision, requiring only an extremely low-intensity turbulent field to avoid excessive turbulence breaking the few existing micro-flocs, while maximizing the retention of beneficial mineral elements. The radial angle between the vane 66 and the flocculation tank 5 is 5 degrees, forming a low-intensity, stable turbulent field, generating only weak and controllable micro-vortices, adapting to the micro-flocculation requirements of low-turbidity water bodies.

[0036] During the water injection and grading adaptation flocculation reaction stage, the natural water to be treated is first injected into the left water storage tank of the treatment tank 1 through the water injection pipe 11. At this time, the servo motor 641 needs to be started. The servo motor 641 will drive the rotating shaft 64 to rotate. The rotating shaft 64 will drive the mixing paddle 643 at the lower end and the turbine paddle 642 in the middle to rotate synchronously. At the same time, flocculant is quantitatively added into the flocculation tank 5 through multiple sets of addition pipe 14, and coagulant aid is quantitatively added into the flocculation tank 5 through addition pipe 2 15 (added as needed according to the quality of the natural water). After the natural water enters the treatment tank 1, it will continue to be stably guided along the guide plate 61 to the flow limiting base 4. The flow limiting by the guide plate 61 prevents the natural water from directly impacting the flocculation tank 5 and causing excessive water flow turbulence, ensuring the natural water... Water is introduced steadily, and during this process, the natural water and the reagent will undergo initial mixing at the bottom of the flocculation tank 5. The mixing paddle 643 performs high-intensity shear mixing on the natural water and reagent at the bottom of the flocculation tank 5, ensuring full contact between the reagent and the mineral ions and colloidal particles in the natural water. After the initial coagulation reaction is completed, the natural water will continue to enter the bottom cavity of the flocculation tank 5. During this process, the rotating shaft 64 will also drive the central turbine paddle 642 to rotate synchronously. The blades of the turbine paddle 642 are designed with an axial tilt. It is worth emphasizing that, as the water flows into the flocculation tank 5 from the bottom flow-limiting base 4, the water pressure naturally pushes the water upwards as water continues to enter the bottom of the flocculation tank 5, causing the water level inside the flocculation tank 5 to rise continuously until it is full. Then, the water will naturally overflow from the tank opening of the flocculation tank 5 through the overflow plate 63. Simultaneously, as the turbine propeller 642 rotates, it generates a continuous upward axial thrust. Therefore, under the combined action of water overflow and the upward axial thrust of the turbine propeller 642, the natural water at the bottom of the flocculation tank 5 can be continuously transported upward. This, combined with the pre-set angled vanes 66, forms a graded turbulent flow field. The surface of the vanes 66 has several linearly and uniformly distributed arc-shaped grooves, which can generate controllable micro-vortices when the water flows through, enhancing the mass transfer and diffusion between the reagent and the natural water. The flexible rubber layer on the outer edge of the vanes 66 forms a buffer collision surface, which promotes the collision of micro-flocs while preventing the flocs from breaking. This allows the initially formed micro-flocs to continue to collide and grow in the turbulent flow field, forming dense flocs. Through the upper and lower graded action of the mixing propeller 643 and the turbine propeller 642, the flocculation process is completed. Stirring creates a graded reaction environment of "high-intensity mixing and coagulation at the bottom + stable turbulent floc growth in the middle". The arc-shaped grooves on the surface of the vane 66 can generate controllable micro-vortices, which improves the diffusion efficiency of the agent in the water, shortens the agent mixing time, and reduces the agent dosage. In addition, the adjustable vane 66 forms an adaptive turbulent field, which can adjust the turbulence angle of the vane 66 for different water qualities, and grade it to adapt to natural water with different minerals and turbidity. This allows for graded control of the floc formation characteristics of natural water with different mineral structures, avoiding the problem of insufficient flocculation causing a large amount of colloidal and large molecular organic matter to penetrate to the back end, block the micropores of the adsorption medium, and seize effective adsorption sites, resulting in a significant decrease in the utilization rate of the filter cartridge adsorption capacity and a significant shortening of its service life.

[0037] In the post-flocculation solid-liquid separation and supernatant guidance stage, the sludge-water mixture after flocculation will flow out from the top of the flocculation tank 5, first impacting the conical plate of the reflector plate 62. The reflector plate 62 evenly reflects and disperses the water flow in all directions, significantly reducing the water flow velocity. This causes large flocs in the mixture to settle rapidly under gravity. The settled flocs slide down along the guide plate 61 into the sludge accumulation area between the outer wall of the flocculation tank 5 and the inner wall of the left water storage tank, completing the initial enrichment of sludge flocs. The water that has undergone initial settling will flow upward to the overflow plate 63 and pass through the toothed annular plate at the upper end of the overflow plate 63. The overflow process is stable, and the residual micro-flocs further settle during the overflow process, eventually forming a clear supernatant. The deceleration and reflection of the reflector plate 62 prevents the water flow from directly impacting the overflow plate 63 and causing sludge churning, thus providing sufficient residence time for the flocs to settle. The inclined structure of the guide plate 61 achieves sludge enrichment and limitation, preventing the settled sludge from being rolled up again by the water flow. The toothed structure of the overflow plate 63 achieves uniform overflow, avoiding excessive local flow velocity that could lead to excessive turbidity in the supernatant, greatly improving the solid-liquid separation efficiency and the clarity of the supernatant, and minimizing the impurity load on subsequent filtration units.

[0038] When the sludge flocs enriched in the flow-limiting base 4 reach the preset thickness, open the valve of the sludge discharge pipe 13 to discharge the enriched precipitated sludge flocs from the system through the sludge discharge pipe 13. After the discharge is completed, close the valve of the sludge discharge pipe 13. At the same time, the supernatant after solid-liquid separation will also be discharged through the drain pipe 12 on the upper left side of the treatment tank 1 and stably transported to the filter body 2 to enter the subsequent filtration process. By using the flocculation tank 5, guide inclined plate 61, reflector plate 62 and drain pipe 12 in combination, the effects of flocculation and solid-liquid separation can be achieved simultaneously, and the solid-liquid separation effect is better than that of conventional flocculation equipment.

[0039] In the multi-media filtration and graded adsorption path distribution stage, the supernatant enters the filter body 2 and undergoes precision filtration through the multi-media filtration layer within the filter body 2, removing residual micro-flocs, suspended particles, and colloidal impurities from the supernatant. The turbidity of the filtered effluent meets the inlet water requirements of the adsorption unit. The filtered natural water is then transported through the upper multi-directional conveying pipe 16. Through the four-way valve on the upper multi-directional conveying pipe 16, the natural water is precisely delivered to the corresponding adsorption chamber in the water storage tank on the right side of the treatment tank 1, according to the type of natural water. This achieves precise matching between natural water with different mineral structures and the corresponding adsorption unit, completing the targeted matching of pre-flocculation pretreatment and post-stage graded adsorption purification.

[0040] In the graded and adapted deep adsorption purification stage, natural water enters the corresponding adsorption chamber. The natural water first enters the uppermost adsorption box 82, where it undergoes initial adsorption by conventional activated carbon particles, removing residual chlorine, odors, and some small-molecule organic matter. It should be noted that during the adsorption purification process, the electromagnetic vibrator 831 can control the elastic drain net 83 to perform periodic micro-vibrations (without stopping the machine). The high-frequency micro-vibrations are transmitted to the elastic drain net 83 via a transmission rod. The elastic drain net 83 shakes off particulate impurities attached to the net body through high-frequency vibration, simultaneously dislodging... The trace scale on the surface of the upper activated carbon particles keeps the carbon particle pores open. By periodically stopping the natural water flow and opening the external drain port on the side wall of the adsorption chamber, the reverse water intake completes the reverse flushing of the adsorption chamber, expelling the trapped crystalline impurities and particulate pollutants from the system. Through the elastic unblocking net 83 driven by electromagnetic vibration, online non-stop anti-blocking and unblocking are achieved without stopping the machine for disassembly and cleaning, ensuring the stability of continuous system operation. Periodic micro-vibration can simultaneously clean the trace scale on the surface of the activated carbon particles, continuously keeping the carbon particle adsorption pores open and avoiding rapid decline in adsorption performance.

[0041] Next, the flow equalization plate 81 ensures uniform distribution of the water flow across the entire cross-section, preventing flow deviation and short-circuiting issues. After initial adsorption, the natural water flows from top to bottom through multiple adsorption boxes 82 on the lower side. Each adsorption box 82 contains a dedicated graded adsorption packing material corresponding to the type of natural water, achieving targeted deep purification and graded adaptation with the pre-flocculation pretreatment. For natural water with high hardness after flocculation: modified zeolite and quartz sand are used to remove hardening ions such as calcium and magnesium from the water, coarse coconut shell activated carbon is used to remove organic matter and color from the water, and lightweight ceramic particles are used to further filter residual impurities and stabilize water quality. For natural water with high organic matter flocculation: the product sequentially uses coconut shell activated carbon and diatomaceous earth to adsorb large molecular organic matter and turbidity substances in the water, uses three-level gradient coconut shell activated carbon to adsorb organic matter of different molecular weights, and uses silver-loaded activated carbon to remove bacteria and microorganisms in the water while inhibiting bacterial growth. For spring water with low turbidity and high mineralization: the process involves sequentially using maifan stone to extract beneficial minerals and adjust the water's mineralization; homogenized coconut shell activated carbon to remove odors and trace organic matter from the water; and activated alumina microspheres to remove excess fluoride ions and heavy metal ions from the water, while retaining beneficial mineral elements from the natural water.

[0042] By combining customized graded adsorption fillers for natural water with different mineral structures, and forming a precise match with pre-flocculation and graded treatment, it can achieve graded adaptation based on the mineral structure of natural water and the characteristics of the effluent from the front-end flocculation, thus achieving targeted purification. It can not only remove harmful impurities in natural water in a targeted manner, but also accurately retain beneficial minerals in natural water. This avoids the problems of "over-purification and loss of minerals" or "incomplete purification and substandard water quality" in traditional general purification processes, and significantly improves the purification quality and drinking safety of natural drinking water.

[0043] It is worth emphasizing that the treatment tank 1 and the adsorption tanks 82 on both the front and rear sides are equipped with a membrane cleaning unit 85, while the adsorption tank 82 in the middle is not equipped with a membrane cleaning unit 85. Specifically, since high-hardness and high-organic-content water is effluent after flocculation, it contains residual micro-flocculations, hardness precipitates, and turbidity particles. These suspended impurities easily adhere to the surface of the packing material, clogging the pores and causing packing material compaction and flow channel blockage. They are the core targets of the pulse flushing of the membrane cleaning unit 85. Therefore, for high-hardness flocculated natural water and high-organic-content flocculated natural water, the membrane cleaning unit 85 is the primary treatment target. However, all water types require a membrane cleaning unit 85; while the core characteristic of low-turbidity, high-mineralization spring water is low turbidity, with almost no suspended particulate matter or colloidal impurities. Even with pre-flocculation, very little sediment is produced. Its core pollutants are ionic fluoride ions, heavy metal ions, and trace amounts of ionic mineral elements. Ionic pollutants do not cause physical blockage of the filler pores, nor do they cause filler caking. The core declogging and anti-caking functions of the membrane cleaning unit 85 have no applicable scenarios. Therefore, the membrane cleaning unit 85 is not required for low-turbidity, high-mineralization spring water.

[0044] During the online cleaning and anti-clogging maintenance phase, several adsorption boxes 82 can activate intermittent motors 842 during adsorption operation. These motors 842 drive the drive shafts on both sides to rotate synchronously via a transmission belt. The drive shafts then drive the cams 841 on the outer wall to rotate synchronously. Under the action of compression springs connected to several pressure plates 855, the cams 841 will drive the support 84 to slide up and down along the flow equalization plate 81 during rotation. Since the uppermost pressure plate 855 is fixedly connected to the support 84, and several pressure plates 855 are fixedly sleeved on the support shaft 854, the pressure plates 855 will slide up and down synchronously with the support shaft 854. Furthermore, the several adsorption boxes 82 and the support plates 855... With position 1 unchanged, the bracket 84 will drive the corresponding pressure plates 855 to move up and down synchronously. The pressure plates 855 will jointly drive the support shaft 854 to slide up and down synchronously along the inner wall of the pressing rods 853. When the lower end of the pressure plate 855 is tightly attached to the upper end of the corresponding pressing rod 853, the pressure plate 855 will drive the pressing rod 853 to move down synchronously and apply downward pressure to the pressing rod 853. Through the linkage structure of cam 841, bracket 84, pressure plate 855 and support shaft 854, the synchronous driving of the cleaning mechanism in multiple adsorption boxes 82 is realized. The structure is compact, and the adsorption box 82 and support plate 851 remain fixed throughout the process, without affecting the normal operation of the adsorption purification process.

[0045] It is worth emphasizing that the symmetrically distributed arc-shaped diaphragms 852, the extension plate in the middle, and the inner wall of the adsorption box 82 together form an independent water storage chamber. When the cam 841 rotates to the reset stroke, under the action of the compression spring, the pressure plate 855 and the support shaft 854 will move upward to return to their original positions. The downward pressure on the pressing rod 853 will disappear, and the elastic diaphragm 852 will extend upward to return to its original position under the action of the compression spring and its own elasticity. The internal volume of the water storage chamber of the elastic diaphragm 852 will expand rapidly, and an instantaneous negative pressure will be formed inside the chamber. The water to be purified in the adsorption box 82 will be quickly drawn in through the gaps in the side wall of the elastic diaphragm 852 and several spray holes on the extension plate, completing the automatic filling and storage of water in the water storage chamber, and reserving sufficient water for the next spray cleaning.

[0046] When the pressing rod 853 is subjected to downward pressure by the pressure plate 855, the pressing rod 853 will cause the arc-shaped diaphragm on the upper side of the elastic diaphragm 852 to be squeezed and deformed downward. During this process, the distance between the upper and lower arc-shaped diaphragms will rapidly decrease, and the volume of the water storage chamber will be drastically compressed. The pre-stored natural water in the chamber will be rigidly squeezed to form an instantaneous pressurized water flow. Most of the pressurized water flow will form a directional pulse jet through the evenly distributed spray holes on the extension plate, vertically scouring the inner wall of the adsorption tank 82 and the activated carbon packing layer. Through the self-circulating water storage-drainage structure of the elastic diaphragm 852, the elastic diaphragm 852 can achieve intermittent water storage and drainage. The repeated thrust causes cyclic micro-deformation, forming a three-dimensional micro-turbulence inside the adsorption tank 82. The turbulence range fully covers the side wall of the adsorption tank 82 and the internal gaps of the activated carbon packing, completely destroying the static water retention layer of the water body. During the reciprocating compression and deformation of the elastic diaphragm 852, several jet holes on its extension plate will also generate pulsed jet water flow simultaneously, which will perform micro-flow disturbance and flushing on the inner wall of the adsorption tank 82 and the surface of the adsorption packing, shaking off the impurities attached to the surface of the packing. At the same time, the rectangular through holes on the extension plate enhance the water flow disturbance, which can also prevent the phenomenon of natural water deposition and packing caking.

[0047] The three-dimensional micro-turbulence generated by the reciprocating micro-deformation of the elastic diaphragm 852 can fully cover the side walls of the adsorption tank 82 and the internal gaps of the activated carbon packing, completely destroying the static water retention layer. This not only enables online self-cleaning of the adsorption tank 82 and the adsorption packing through pulse jet water flow, removing impurities attached to the surface of the packing and preventing packing blockage and adsorption performance degradation, but also effectively inhibits the formation of biofilm on the surface of the packing and the inner wall of the tank, eliminating the risk of bacterial growth. No additional booster pump or air source is required; pulse cleaning can be achieved solely through mechanical linkage, resulting in low energy consumption and thorough cleaning. Simultaneously, it achieves anti-caking maintenance of the adsorption packing, keeping the packing in a loose and uniform state, improving packing utilization, extending the packing replacement cycle, and significantly reducing system operation and maintenance costs.

[0048] During the finished water discharge stage, the finished water after deep adsorption purification can be discharged through the multi-directional conveying pipe 16 on the lower side. Specifically, the finished water in the corresponding adsorption chamber is uniformly transported to the finished water storage pipeline by the four-way valve on the multi-directional conveying pipe 16 on the lower side to complete the entire purification process. After the treatment of a single batch of natural water is completed, cleaning water is injected into the system through the water injection pipe 11 to flush the flocculation tank 5, filter body 2, adsorption box 82 and the entire pipeline in sequence. At the same time, the external sewage outlets on the side walls of each adsorption chamber are opened to complete the reverse flushing. The flushed wastewater is discharged from the system through the sludge discharge pipe 13, the external sewage outlets and the multi-directional conveying pipe 16 on the lower side, thus completing the full-link cleaning work of the system.

[0049] This application constructs a synergistic adaptation system of "pre-treatment by tiered flocculation + post-treatment by targeted tiered adsorption": the flocculation and tiered reaction structure is a pre-treatment tailored to the multi-stage filter / adsorption structure; the multi-stage filter / adsorption structure is the post-treatment targeted to match the flocculation and tiered reaction structure. Together, they achieve: tiered load reduction, tiered adaptation, and tiered retention for water sources with different mineral structures. This application first uses the flocculation reaction section 6 to perform differentiated pretreatment on natural water with different mineral structures, significantly reducing the pollution load of pollutants such as colloids, organic matter, and hardness on subsequent multi-stage filter cartridges. Then, the adsorption section 8, matched with the flocculation reaction section 6, achieves targeted purification and selective retention of minerals. The two work synergistically to adapt to water sources with different mineral structures, forming a complete multi-stage purification system.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage purification system for natural drinking water based on filter cartridges adapted to different mineral structures, characterized in that, include: The treatment box (1) consists of a box body with two water storage chambers on the left and right sides and a cover plate. A filter body (2) is provided on the front side of the treatment box (1). A guide plate (3) is installed on the rear side of the inner wall of the left water storage chamber. A flow-limiting base (4) is installed on the inner wall of the bottom of the left water storage chamber and the guide plate (3). The flow-limiting base (4) is a U-shaped structure. A flocculation tank (5) is installed on the upper end of the flow-limiting base (4). A flocculation reaction section (6) is provided on both the treatment box (1) and the flocculation tank (5). A partition plate (7) is symmetrically installed on the inner wall of the right water storage chamber. The two partition plates (7) divide the right water storage chamber into three adsorption chambers corresponding to the three types of natural water. An adsorption section (8) is provided on both the treatment box (1) and the partition plate (7). The flocculation reaction section (6) includes a reflector plate (62) installed on the inner wall of the left water storage tank above the flocculation tank (5). An overflow plate (63) is installed on the inner wall of the left water storage tank above the reflector plate (62) to stabilize the natural water level in the left water storage tank and automatically overflow when the water level is too high. The overflow plate (63) is composed of an annular plate with a toothed structure at the upper end and a rectangular sleeve plate fixedly fitted on the outer wall of the annular plate. An angle-adjustable blade (66) is provided on the inner wall of the flocculation tank (5). An adjustment group (68) for driving the blade (66) to rotate and adjust the angle is provided on both the treatment box (1) and the flocculation tank (5). The adsorption unit (8) includes a flow equalization plate (81) installed on the inner wall of the right water storage tank and on the front and rear partitions (7). There are several flow equalization plates (81), and each adsorption chamber is equipped with an adsorption box (82) adapted to the corresponding natural water type. The treatment box (1) and the adsorption boxes (82) on the front and rear sides are equipped with a membrane cleaning group (85).

2. The multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures as described in claim 1, characterized in that: The flocculation reaction section (6) also includes a guide plate (61) installed on the upper end of the flow-limiting base (4). The guide plate (61) is fixedly sleeved on the outer wall of the flocculation tank (5). A rotating shaft (64) is rotatably installed on the inner wall of the bottom end of the left water storage tank. Several circumferentially distributed accommodating cavities (65) are opened on the inner wall of the bottom end of the flocculation tank (5). Several gears (67) distributed from top to bottom are rotatably installed on the inner wall of the accommodating cavity (65). Several blades (66) are provided. Several blades (66) are rotatably installed on the inner wall of the flocculation tank (5) through a short shaft. The short shaft on the blade (66) is fixedly connected to the corresponding gear (67).

3. The multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures as described in claim 1, characterized in that: The adsorption unit (8) also includes an elastic drainage net (83) installed in the adsorption box (82) located on the upper side. An electromagnetic vibrator (831) is installed on the upper end of the cover plate. A transmission rod that slides through the cover plate is symmetrically installed on the lower end of the electromagnetic vibrator (831). The lower end of the transmission rod is fixedly connected to the elastic drainage net (83). A bracket (84) is slidably installed on the upper end of the flow equalization plate (81) on both the left and right sides. The bracket (84) consists of a horizontal plate and two sliding rods on the left and right sides. Each group of adsorption boxes (82) is provided with several. One adsorption box (82) is located on the upper side of the flow equalization plate (81), and the remaining adsorption boxes (82) are located on the lower side of the flow equalization plate (81) and are evenly distributed from top to bottom.

4. The multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures according to claim 1, characterized in that: The regulating group (68) includes a sealing plate (681) installed at the lower end of the flocculation tank (5) corresponding to several receiving cavities (65). A rack (682) is slidably installed on the inner wall of the receiving cavity (65) corresponding to the sealing plate (681). The rack (682) meshes with several corresponding gears (67) at the same time. A connecting plate (683) is installed at the lower end of several racks (682). The connecting plate (683) has a ring structure. Electric push rods (684) are symmetrically installed on the left and right sides of the lower end of the treatment box (1). The telescopic end of the electric push rod (684) slides through the treatment box (1) and is fixedly connected to the connecting plate (683).

5. A multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures according to claim 1, characterized in that: The cleaning membrane assembly (85) includes a number of support plates (851) symmetrically installed on the inner walls of several adsorption boxes (82) located below the flow equalization plate (81). An elastic diaphragm (852) is provided between the upper and lower support plates (851). The elastic diaphragm (852) is composed of an arc-shaped diaphragm and an extension plate that are symmetrically distributed vertically. The left and right ends of the arc-shaped diaphragm are gapped against the inner wall of the adsorption box (82). The left and right ends of the extension plate and the end away from the arc-shaped diaphragm are gapped against the inner wall of the adsorption box (82). The upper end of the extension plate is provided with a rectangular through hole and several linearly distributed spray holes. The rectangular through hole and the spray holes are evenly distributed from left to right.

6. A multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures, as described in claim 5, is characterized in that: The membrane cleaning assembly (85) also includes pressing rods (853) symmetrically and integrally installed on the upper end of the arc-shaped diaphragm. The pressing rods (853) slide through the corresponding adsorption box (82). The lowermost pressing rod (853) is a cylindrical structure with the opening facing upwards. The remaining pressing rods (853) are hollow rod structures. A support shaft (854) is slidably installed on the inner wall of several pressing rods (853). The support shaft (854) passes through the corresponding support plate (851) and the elastic diaphragm (852). A pressure plate (855) is fixedly sleeved on the outer wall of the support shaft (854) above each pressing rod (853). The lower end of the pressure plate (855) is connected to the corresponding adsorption box (82) through a compression spring. The uppermost pressure plate (855) is fixedly connected to the corresponding bracket (84).

7. A multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures, as described in claim 4, is characterized in that: The processing box (1) has a drive shaft mounted on the right end corresponding to the position of the bracket (84). Cams (841) are symmetrically fixed on the outer wall of the drive shaft. The outer wall of the cam (841) rolls against the corresponding bracket (84). The two drive shafts are connected at the right end by a drive belt. An intermittent motor (842) for driving the front drive shaft is installed at the right end of the processing box (1).

8. A multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures, as described in claim 2, is characterized in that: The upper end of the rotating shaft (64) rotates through the cover plate. A servo motor (641) for driving the rotating shaft (64) to rotate is installed on the upper end of the cover plate. A turbine propeller (642) is fixedly sleeved in the middle of the outer wall of the rotating shaft (64), and a mixing propeller (643) is fixedly sleeved at the lower end of the outer wall of the rotating shaft (64).

9. A multi-stage purification system for drinking natural water based on filter element gradation and adaptation to different mineral structures, as described in claim 7, is characterized in that: The upper left side of the outer wall at both ends of the treatment box (1) is connected to a drain pipe (12) and a water injection pipe (11), respectively. The lower left side of the rear end of the treatment box (1) is connected to several addition pipes (14), and the lower left side of the treatment box (1) is connected to an addition pipe (15). The treatment box (1), the flow limiting base (4) and the guide inclined plate (61) are connected to a mud discharge pipe (13). The upper and lower right ends of the treatment box (1) are symmetrically connected to multi-directional conveying pipes (16).

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