Bromine-reducing filtering device for drinking water

Abstract

The invention discloses a drinking water bromine-reducing filtering device which comprises a bottom plate, a pretreatment tank, a bromine-reducing filtering part and an adsorption tank are arranged above the bottom plate, a mounting frame on the bottom plate is used for fixedly mounting the pretreatment tank and the adsorption tank, a pressure regulating assembly is further arranged above the bottom plate, and the pressure regulating assembly can press the filtering part in a self-adaptive mode and adjust the compactness of filter materials in the two tanks in a linkage mode. The two tanks form a linkage structure; a pre-storage part on the bottom plate communicates effluent water of the pretreatment tank and inflow water of the bromine-reducing filtering part with effluent water and inflow water of the adsorption tank, so that a complete filtering path is constructed; the pretreatment tank is provided with a water inlet end, and the adsorption tank is provided with a water outlet end; filtering sleeves are arranged in the two tanks, filtering parts in the sleeves can intercept suspended matters, organic matters and residual bromine substances in a grading manner, and pressure regulating assemblies extend into the sleeves to be in contact with the filtering parts; the device realizes linkage adjustment of the compactness of the filter material, balances the filtering load, improves the bromine reduction stability and the utilization rate of the filter material, adapts to complex raw water working conditions, and ensures the water supply safety.

Description

Technical Field

[0001] This invention belongs to the field of drinking water treatment technology, and more specifically, relates to a drinking water debromine filtration device. Background Technology

[0002] In the process of drinking water generation or in the deep treatment section of large-scale water supply scenarios, in order to control the content of bromide and bromate generated in raw water and disinfection process and ensure water supply safety, drinking water debromine filtration devices are used. These devices can effectively remove harmful bromine substances from water. However, during the debromination process of drinking water, the pretreatment filter media and adsorption filter media are prone to loosening and stratification due to water flow impact, resulting in water flow short circuit and low filter media utilization. At the same time, the turbidity and bromine content of the raw water fluctuate greatly under different operating conditions, requiring dynamic adjustment of the filter media compaction to adapt to the treatment requirements. This requires the device to have the ability to compact the filter media and adjust multiple tanks in a coordinated manner to ensure stable debromination efficiency and extended filter media service life.

[0003] However, traditional drinking water bromine reduction devices often use a fixed filter media layer structure, relying solely on the gravity of the filter media itself or a simple pressure plate to achieve static limiting. This makes it impossible to dynamically adjust the compaction degree according to filter media wear and raw water conditions. Furthermore, the filter media compaction mechanisms of the pretreatment tank and the adsorption tank are independent of each other, requiring manual adjustment separately. This not only increases the labor intensity of operation and maintenance but also leads to mismatches in the compaction degree of the filter media in the two tanks, resulting in insufficient pretreatment and uneven adsorption load. Consequently, the bromine reduction effect fluctuates, filter media needs to be replaced frequently, and operation and maintenance costs increase, making it difficult to adapt to the stable bromine reduction requirements under complex raw water conditions. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a drinking water bromine reduction filtration device with advantages such as dynamic compaction of filter media and multi-tank linkage adjustment. It solves the problems of existing drinking water bromine reduction devices that cannot dynamically adjust the compaction of filter media according to filter media wear and raw water conditions during use, and that the compaction mechanisms of the pretreatment tank and adsorption tank are independent and require manual adjustment, resulting in mismatched compaction of filter media in the two tanks, insufficient pretreatment, uneven adsorption load, and consequently, fluctuations in bromine reduction effect, frequent replacement of filter media, increased operation and maintenance costs, and difficulty in adapting to stable bromine reduction requirements under complex raw water conditions.

[0005] The purpose and efficacy of the drinking water debromine filtration device of the present invention are achieved by the following specific technical means: A drinking water debromine filtration device includes a base plate, a pretreatment tank, a debromine filtration section, and an adsorption tank arranged on the top of the base plate. A mounting frame is provided on the base plate, and the pretreatment tank and the adsorption tank are respectively mounted on the mounting frame. A pressure regulating component is provided on the top of the base plate for adaptively compressing the filtration section and for adjusting the compaction of the filter media in the pretreatment tank and the adsorption tank in a linkage manner. The pressure regulating component enables a linkage structure between the pretreatment tank and the adsorption tank. The base plate is equipped with a pre-storage section, which connects the pretreatment tank outlet, the bromine reduction filtration section inlet and outlet, and the adsorption tank inlet to form a filtration path. The pretreatment tank is equipped with an inlet end, and the adsorption tank is equipped with an outlet end. Both the pretreatment tank and the adsorption tank are equipped with filter sleeves. Inside the filter sleeves are filter sections for graded interception of suspended solids, organic matter and residual bromine substances. The pressure regulating components are located inside the filter sleeves on the pretreatment tank and the adsorption tank, respectively, and are in contact with the filter sections.

[0006] Compared with existing technologies, this invention has the following advantages: it integrates pretreatment, bromine reduction filtration, and adsorption functions into one unit, and achieves stable assembly of each component through a base plate and mounting frame. The structure is compact and the layout is reasonable, making it suitable for installation requirements in large-scale water supply and commercial scenarios. The pressure regulating component enables the linkage adjustment of the filter media compaction degree between the pretreatment tank and the adsorption tank, solving the drawbacks of independent filter media compaction mechanisms in traditional devices that require separate manual operation, reducing the labor intensity of operation and maintenance, and ensuring that the compaction degree of the filter media in the two tanks is matched, avoiding problems such as water flow short circuit and low filter media utilization. The pre-storage section enables the connection and buffering of water flow in each module, balancing the load impact caused by fluctuations in raw water conditions, ensuring a stable and continuous bromine reduction process. The cooperation between the filtration section and the pressure regulating component achieves graded decontamination and dynamic compaction, significantly improving the bromine reduction effect and filter media lifespan, and ensuring that the effluent water quality meets standards.

[0007] Preferably, the filter section includes multiple filter layers, which are arranged along the extension direction of the filter sleeve and are bonded to each other to form a laminated structure. The filtration section includes multiple filter layers, which are arranged along the extension direction of the filter sleeve and are bonded together to form a laminated structure. The filter layer inside the filter sleeve on the pretreatment tank is a PP cotton pretreatment layer. Among multiple PP cotton pretreatment layers, the pore size of the upper PP cotton pretreatment layer is larger than that of the lower PP cotton pretreatment layer. The filter layer inside the filter sleeve on the adsorption tank is a modified activated carbon adsorption layer. Among multiple sets of modified activated carbon adsorption layers, the particle size of the upper modified activated carbon adsorption layer is larger than that of the lower modified activated carbon adsorption layer. The filtration section employs a multi-layered design. The PP cotton pretreatment layer in the pretreatment tank is arranged with an upper pore size larger than the lower layer, while the modified activated carbon adsorption layer in the adsorption tank is arranged with an upper particle size larger than the lower layer, together forming a progressive interception gradient. The PP cotton pretreatment layer intercepts large suspended solids and colloids through the pore size gradient, preventing clogging of the subsequent bromine-reducing semi-permeable membrane composite layer. The modified activated carbon adsorption layer, utilizing the particle size gradient, ensures smooth water flow in the upper layer while the lower layer adsorbs residual bromide ions and byproducts with a larger specific surface area, resulting in synergistic effects. The layered, bonded structure increases the contact area and improves efficiency, and is compatible with the pressure regulating component's clamping action, preventing filter media layer shifting and ensuring filtration stability.

[0008] Preferably, the pressure regulating component includes a rotating member and an extrusion member disposed inside the filter sleeve. The rotating member is mounted on the filter sleeve and rotatably connected to the filter sleeve. The extrusion member is provided with multiple sets of sliding rods, which extend upward above the filter sleeve, and a connecting ring is provided at the top of the multiple sets of sliding rods. Near the edge of the filter sleeve, the rotating component is equipped with a first connecting rod and a second connecting rod. The first connecting rod is connected to the connecting ring through a connecting structure. A lifting rod is provided on one side of the mounting frame. The two ends of the lifting rod are respectively connected to the second connecting rods on the two sets of rotating components, so that the rotating components form a linkage structure. A support frame is provided at the top of the filter sleeve, and an electric cylinder is provided on the support frame. The shaft end of the electric cylinder is connected to the first connecting rod through a connecting rod structure, and the connection point on the first connecting rod is close to the end of the first connecting rod.

[0009] Preferably, the extruder contacts the top of the filter section, and the diameter of the extruder is smaller than the inner diameter of the filter sleeve. At the same time, the cross-section of the extruder is L-shaped, and a gap is formed between the outer wall of the extruder and the inner wall of the filter sleeve, and this gap is set as an annular channel. The extrusion part is equipped with a reinforcing crossbar, which coincides with the central axis of the extrusion part. The reinforcing crossbar divides the extrusion part into two cleaning zones. The extrusion part has a drain opening, which connects the cleaning zone with the annular channel. A cleaning component is installed on the reinforcing crossbar. A collection section is provided on one side of the mounting bracket, and a drain outlet is provided on one side of the filter sleeve. The drain outlet is connected to the annular channel and is connected to the collection section through a collection pipe. When the filter section is not compressed, it blocks half of the drain outlet. When the filter section is squeezed, it blocks one-third of the drain outlet; The drainage gap connects the cleaning zone and the annular channel. Combined with the design of the shielding ratio of the drainage port under different compression conditions, it reduces water flow loss when not compressed and increases the drainage volume when compressed. This allows impurities that fall off during the compaction of the filter media to be discharged in time, preventing impurities from seeping back and contaminating the filter media.

[0010] Preferably, the cleaning component includes a sealed housing and a drive motor. The sealed housing is mounted on the reinforcing crossbar and a sealing plate is provided inside the sealed housing. A sealed cavity is formed by the sealing plate and the sealed housing. A swing cavity is formed between the sealing plate and the reinforcing crossbar. The drive motor is mounted in the sealed cavity and the shaft end of the drive motor extends into the swing cavity. A cleaning scraper is installed in the cleaning area. Swing grooves are provided on both sides of the sealed shell. One end of the cleaning scraper extends through the swing groove into the swing cavity. At the same time, a connector is provided at the end of the drive motor shaft, and one end of the cleaning scraper is locked onto the connector. The drive motor drives the cleaning scraper to swing along the swing groove through the connecting parts, realizing dynamic cleaning of the filter media surface. Compared with the traditional static filter media structure, it can remove impurities attached to the filter media surface and avoid filter media clogging. Meanwhile, the oscillating design of the cleaning scraper adapts to the space of the cleaning zone, and the snap-fit ​​connection makes it easy to disassemble and replace the scraper, reducing maintenance difficulty and further ensuring the permeability and filtration efficiency of the filter section.

[0011] Preferably, the reinforcing crossbar is located between two sets of opposing sliding bars, and the width of the reinforcing crossbar is equal to the width of the sliding bar, so that the sides of the reinforcing crossbar and the sliding bar are flush with each other and form a guide plane, and the sewage discharge opening is opened outward from the guide plane; The two sets of drainage gaps are located at both ends of the reinforced crossbar; The cleaning scraper has an flared groove, with one end wider than the other, and the flared end faces the side without a drain opening.

[0012] Preferably, the collection unit includes a collection box and multiple sets of first water pumps. A snap-fit ​​plate is provided on one side of the mounting frame, and multiple sets of positioning holes are provided on the snap-fit ​​plate. Multiple sets of positioning posts are provided on one side of the collection box, and the positioning posts pass through the multiple sets of positioning holes, so that the collection box is installed on the snap-fit ​​plate. The first water pump has multiple sets of positioning through holes. The positioning bolt passes through the positioning through holes and is locked in one of the positioning holes, so that the first water pump is installed on the perforated plate. The first water pump is connected to the collection box and the sewage outlet on the filter sleeve through connecting pipes.

[0013] Preferably, the bromine-reducing filtration section includes a filter tank, a support frame, and a bromine-reducing semi-permeable membrane composite layer. A first partition is provided inside the filter tank, and the support frame is located inside the filter tank and installed on the first partition. The diameter of the support frame is smaller than the inner diameter of the filter tank, so that a filtration space is formed between the support frame and the inner wall of the filter tank. The bromine-reducing semi-permeable membrane composite layer is sleeved on the outside of the support frame. The bromine-reducing semi-permeable membrane composite layer is in contact with the filtration space. The first partition is provided with a drainage section for draining the permeate water after the bromine-reducing semi-permeable membrane composite layer has permeated through it. The drainage section is located at the center of the first partition and is located inside the support frame. Multiple sets of reinforcing rings are installed inside the support frame to reinforce the support frame structure and prevent it from being deformed by water flow. At the same time, they form inner support for the bromine-reducing semi-permeable membrane composite layer and prevent the membrane layer from collapsing. The multiple sets of reinforcing rings are arranged at equal intervals along the length of the support frame. The surface of the bromine-reducing semi-permeable membrane composite layer that comes into contact with the filtration space has groove textures.

[0014] Preferably, the bromine-reducing filtration section further includes a spiral baffle, which is sleeved on the support frame and located in the filtration space. The spiral baffle is in contact with the bromine-reducing semi-permeable membrane composite layer on the support frame and the inner wall of the filter tank. The filter tank is also equipped with a second baffle, which is fitted onto the support frame. The spiral baffle, together with the first baffle and the second baffle, forms a spiral channel in the filter space. The bottom of the spiral channel is set as the water inlet, and the top of the spiral channel is set as the water outlet. A Venturi tube is installed at the inlet, and a buffer tank is installed on the second baffle. The buffer tank is located at the outlet of the spiral channel and has a through groove to connect it with the spiral channel. A drain outlet is installed on the buffer tank. Multiple sets of turbulent breaking protrusions are provided on the inner side of the spiral partition near the bromine-depleted semi-permeable membrane composite layer. The turbulent breaking protrusions are hemispherical or ellipsoidal, with a diameter of 3–6 mm and a height of 2–4 mm, and the distance between them and the surface of the bromine-depleted semi-permeable membrane composite layer is 1–3 mm. Turbulent breaking protrusions disrupt the laminar boundary layer of the water flow, forming microturbulence, which further reduces filter cake deposition on the membrane surface and lowers the membrane fouling rate. At the same time, the hemispherical or ellipsoidal structure does not generate significant water flow resistance, ensuring smooth flow.

[0015] Preferably, the pre-storage unit includes a first pre-storage tank, a second pre-storage tank, and a third pre-storage tank, with the first pre-storage tank located between the second and third pre-storage tanks; The first pre-storage tank is used to buffer the effluent from the pretreatment tank and stably deliver it to the debromination filtration section. The pretreatment tank is connected to the first pre-storage tank through multiple sets of conduits. A second water pump is installed on the bottom plate. The second water pump is connected to the Venturi tubes on the pretreatment tank and the filtration tank respectively. The second pre-storage tank is used to buffer the concentrated water from the bromine reduction filtration section and to achieve circulation and discharge. It is equipped with a filtration mechanism for filtering the concentrated water. The filtration mechanism is connected to the drain outlet. At the same time, the second pre-storage tank is connected to the first pre-storage tank through a conduit. The third pre-storage tank is used to buffer the water produced by the bromine reduction filtration section and transport it to the adsorption tank. The third pre-storage tank is connected to the drainage section on the filtration tank and the adsorption tank respectively. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembled structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a front view of the internal structure of the present invention; Figure 4 This is a schematic diagram of the disassembled filter sleeve of the present invention; Figure 5 This is a structural diagram of the collection section; Figure 6 This is a structural diagram of the collection box; Figure 7 This is a schematic diagram of the structure after the extrusion component and the cleaning assembly are separated; Figure 8 This is a schematic diagram of the pre-storage section; Figure 9 This is a schematic diagram of the disassembled bromine-reducing filtration section.

[0017] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows: 11. Base plate; 12. Mounting frame; 13. First pre-storage tank; 14. Second pre-storage tank; 15. Third pre-storage tank; 16. Second water pump; 21. Pretreatment tank; 22. Adsorption tank; 23. Inlet end; 24. Outlet end; 25. Filter layer; 31. Filter sleeve; 32. Extrusion component; 33. Sliding rod; 34. Support frame; 35. Reinforcing crossbar; 36. Sewage discharge notch; 37. Sewage outlet; 41. Rotating component; 42. Connecting ring; 43. First connecting rod; 44. Second connecting rod; 45. Lifting rod; 46. Electric cylinder; 51. 51. Sealed outer shell; 52. Drive motor; 53. Scraper blade; 54. Connector; 55. Flared through groove; 61. Collection box; 62. First water pump; 63. Perforated plate; 64. Positioning hole; 65. Positioning post; 66. Positioning through hole; 701. Filter tank; 702. Support frame; 703. Bromine-reducing semi-permeable membrane composite layer; 704. First partition; 705. Drainage section; 706. Reinforcing ring; 707. Spiral partition; 708. Second partition; 709. Venturi tube; 710. Buffer box; 711. Turbulent breaking boss. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0019] Example:

[0020] like Figures 1 to 9As shown, this invention provides a drinking water debromination filtration device, including a base plate 11. The base plate 11 serves as the supporting foundation for the entire device and is made of corrosion-resistant metal, providing stable support for the components above and preventing displacement due to vibration during operation, thus ensuring the overall structural stability. A pretreatment tank 21, a debromination filtration section, and an adsorption tank 22 are sequentially arranged above the base plate 11, forming a complete treatment chain of "pretreatment-core debromination-deep adsorption". A mounting frame 12 is fixedly installed on the base plate 11. The mounting frame 12 adopts a frame structure, and its height is adapted to the height of the pretreatment tank 21 and the adsorption tank 22. The pretreatment tank 21 and the adsorption tank 22 are respectively fixedly installed on the mounting frame 12 with bolts, keeping the two tanks horizontally aligned to facilitate smooth water flow. A pressure regulating component is also provided above the base plate 11. This component is used to adaptively compress the filter section and adjust the compaction of the filter media in the pretreatment tank 21 and the adsorption tank 22 in a linkage manner. Through the linkage action of the pressure regulating component, the filter sections in the pretreatment tank 21 and the adsorption tank 22 are synchronously compressed or loosened, avoiding the problem of mismatch in the compaction of the filter media caused by the adjustment of a single tank, ensuring that the filtration efficiency of the two tanks is consistent, and adapting to the filter media treatment needs under different raw water conditions.

[0021] A pre-storage section is located on the base plate 11 below the pretreatment tank 21, the bromine reduction filter section, and the adsorption tank 22. The pre-storage section consists of multiple sealed tanks and connecting pipes. Through the pre-storage section, the effluent from the pretreatment tank 21, the inlet and outlet of the bromine reduction filter section, and the inlet of the adsorption tank 22 can be interconnected, creating a continuous and controllable filtration path. The pre-storage section can buffer the water flow at each stage, balancing fluctuations in water pressure and flow rate, preventing sudden changes in raw water turbidity and bromine content from impacting subsequent treatment stages, and ensuring the overall stability of the device operation. The pretreatment tank 21 has an inlet end 23 at the top. The inlet end 23 uses a pipe structure with a sealed joint, which can connect to an external water supply pipe to introduce the raw water to be treated into the pretreatment tank 21. A valve can also be installed at the inlet end 23 to control the inlet flow rate and start / stop operation. The bottom of the adsorption tank 22 is equipped with a water outlet 24, which is also equipped with a sealing joint. Drinking water that meets the standards after multi-stage treatment by the device is delivered to subsequent water storage equipment or water supply pipeline through the water outlet 24 to meet actual water demand.

[0022] Both the pretreatment tank 21 and the adsorption tank 22 are equipped with filter sleeves 31. The filter sleeves 31 are made of food-grade corrosion-resistant material, with smooth inner walls and dimensions adapted to the tank's internal cavity, providing stable installation space for the filtration section while preventing wear or contamination caused by direct contact between the filter media and the tank. The filter sleeves 31 house the filtration section, which is used to stage and intercept suspended solids, organic matter, and residual bromine in the water. The filtration section in the pretreatment tank 21 focuses on intercepting large suspended solids and colloids, reducing the contamination load on the subsequent bromine reduction filtration section; the filtration section in the adsorption tank 22 focuses on adsorbing residual bromine ions and treatment byproducts, further improving the effluent quality. Pressure regulating components extend into the filter sleeves 31 on both the pretreatment tank 21 and the adsorption tank 22, and are in close contact with the top of the filtration section. This allows them to adjust the compaction of the filtration section through their own movement, and also compensate for any wear and subsidence that occurs during long-term use, maintaining the filtration effect while preventing short-circuiting of the water flow due to loose filter media, thus improving filter media utilization.

[0023] The filtration unit consists of multiple filter layers 25, each with a sheet-like structure, stacked sequentially along the axial extension direction of the filter sleeve 31, forming a complete laminated structure. This laminated structure increases the contact area between the filter media and the water flow, allowing the water to fully pass through each filter layer 25, improving the interception and adsorption effects. Furthermore, each filter layer 25 can be independently disassembled and installed, facilitating the replacement of severely worn layers during subsequent maintenance, thus reducing operating costs. The multiple PP cotton pretreatment layers in the pretreatment tank 21 follow the principle of "the upper pore size is larger than the lower pore size," and the multiple modified activated carbon adsorption layers in the adsorption tank 22 follow the principle of "the upper particle size is larger than the lower particle size." Both form a progressive filtration gradient. The PP cotton pretreatment layers, through the pore size gradient, first intercept larger impurities in the upper layer, and then intercept smaller impurities in the lower layer. The modified activated carbon adsorption layers, through the particle size gradient, ensure smooth water flow in the upper layer and enhance adsorption effect in the lower layer, preventing impurities from directly clogging the deep filter media, extending the service life of the overall filtration section, and ensuring the stability of filtration efficiency.

[0024] The filter layer 25 inside the filter sleeve 31 on the pretreatment tank 21 is a PP cotton pretreatment layer. This PP cotton pretreatment layer is made of high-density PP cotton material with uniform pore size, good mechanical strength and water resistance, and can withstand the pressure of the pressure regulating component without easily breaking. Its core function is to perform preliminary filtration on the raw water entering the pretreatment tank 21. It intercepts large particulate suspended solids, colloids, silt and other impurities in the raw water through a pore size gradient. The upper large-pore filter layer blocks larger impurities, while the lower small-pore filter layer intercepts fine particles, reducing the amount of such impurities entering the subsequent bromine reduction filtration section. This prevents the surface of the bromine reduction semi-permeable membrane composite layer 703 from being rapidly fouled, ensuring the membrane flux and bromine reduction effect of the bromine reduction filtration section. At the same time, the material characteristics of the PP cotton pretreatment layer are adapted to the operating conditions of the pretreatment tank 21. It is not likely to react with substances in the raw water and will not introduce additional impurities, ensuring that the pretreated water quality meets the inlet water requirements of the bromine reduction filtration section.

[0025] The filter layer 25 inside the filter sleeve 31 on the adsorption tank 22 is a modified activated carbon adsorption layer. This adsorption layer is made of modified coconut shell activated carbon, which has a rich microporous structure and active sites on its surface, resulting in a large adsorption capacity and a fast adsorption rate. Its main function is to perform deep adsorption on the product water after the debromination filtration section. Effective adsorption is achieved through a particle size gradient—the upper large-particle adsorption layer provides a smooth channel for water flow, while the lower small-particle adsorption layer, with its larger specific surface area, specifically removes residual bromide ions, small-molecule organic matter, odor substances, and a small amount of byproducts generated during the debromination process, further improving the purity and taste of the effluent. The modified activated carbon adsorption layer is compatible with the filter sleeve 31 of the adsorption tank 22 and can maintain a stable shape under the pressure of the pressure regulating component, avoiding water flow impact that could cause the filter media to loosen and delaminate. At the same time, its adsorption characteristics can synergize with the membrane separation function of the debromination filtration section, ensuring that the drinking water discharged through the outlet 24 meets the requirements.

[0026] like Figures 2 to 4 , Figure 7As shown, the core of the pressure regulating component includes a rotating component 41 and an extruding component 32. The extruding component 32 is placed inside the filter sleeve 31 and contacts the top of the filter layer 25, used to directly apply pressure to adjust the compaction of the filter media. The rotating component 41 adopts a ring structure and is installed at the top edge of the filter sleeve 31. It is rotatably connected to the filter sleeve 31 through a bearing. The bearing reduces the frictional resistance between the rotating component 41 and the filter sleeve 31, ensuring smooth rotation and preventing relative wear between them. Three sets of evenly distributed sliding rods 33 are vertically fixed on the extruding component 32. The sliding rods 33 are made of high-strength metal rods, extending upward through the reserved through hole at the top of the filter sleeve 31 to the top of the filter sleeve 31. A reasonable gap is reserved between the inner wall of the through hole and the sliding rod 33, which does not affect the lifting and lowering movement of the sliding rod 33 and limits its lateral displacement. The top of the multiple sliding rods 33 is fixed with a connecting ring 42 by welding. The connecting ring 42 has a ring structure, which can link the sliding rods 33 into a whole, ensuring that the extruder 32 is subjected to uniform force when it is raised and lowered, and avoiding uneven compaction of the filter layer 25 due to force on one side.

[0027] Near the edge of the filter sleeve 31, on the rotating component 41, a first connecting rod 43 and a second connecting rod 44 are respectively hinged via a rotating shaft. The two sets of connecting rods are arranged at a certain angle and can swing synchronously with the rotation of the rotating component 41. The end of the first connecting rod 43 away from the rotating component 41 is detachably connected to the connecting ring 42 via a bolted connection structure. This connection structure allows for a certain angle of relative rotation between the first connecting rod 43 and the connecting ring 42, adapting to the force transmission requirements when the rotating component 41 rotates, converting the rotational motion of the rotating component 41 into the lifting motion of the sliding rod 33, thereby driving the pressing component 32 to press or loosen the filter layer 25. The mounting frame 12 is located near the pretreatment tank 21 and the adsorption tank 22. A lifting rod 45 is horizontally installed on one side. The two ends of the lifting rod 45 are respectively hinged to the second connecting rod 44 on the two sets of rotating parts 41, so that the rotating parts 41 on the two tanks form a linkage structure. When one set of rotating parts 41 moves, the lifting rod 45 can drive the other set of rotating parts 41 to move synchronously, so as to realize the synchronous adjustment of the compaction of the filter layer 25 in the pretreatment tank 21 and the adsorption tank 22.

[0028] A support frame 34 is welded and fixed to the top of the filter sleeve 31 on one side corresponding to the rotating part 41. The support frame 34 adopts a triangular support structure, which has sufficient structural strength to withstand the driving force and reaction force generated by the electric cylinder 46 during operation, and avoids deformation. The electric cylinder 46 is fixedly installed on the support frame 34 by bolts. The electric cylinder 46 serves as the power source of the pressure regulating component and can provide stable driving force through telescopic movement, replacing manual adjustment and reducing the labor intensity of operation and maintenance. The shaft end of the electric cylinder 46 is connected to the first connecting rod 43 through a universal joint linkage structure. This linkage structure can adapt to the angular deviation between the electric cylinder 46 and the first connecting rod 43 to ensure stable power transmission. Moreover, the connection point between the electric cylinder 46 and the first connecting rod 43 is close to the end of the first connecting rod 43, which can drive the rotating part 41 to rotate with a smaller driving force through the lever arm amplification effect, reducing the energy consumption of the electric cylinder 46, while improving the smoothness of the operation of the extrusion part 32 and adapting to the filter media compaction requirements under different working conditions.

[0029] The bottom end face of the extruder 32 is in full contact with the filter layer 25 at the top of the filter section, which can evenly apply the pressure transmitted by the pressure regulating component to the filter layer 25 to adjust the compaction of the filter media. At the same time, the bottom of the extruder 32 is also equipped with multiple pressure sensors (the pressure sensors are conventional technical means and are not shown in the figure). When the extruder 32 is in contact with the filter layer 25, the pressure sensors can monitor the pressure value applied to the filter layer 25 by the extruder 32 in real time and feed the pressure data back to the device control system. The pressure data is compared with the preset pressure threshold (the optimal compaction pressure of the filter media adapted to different raw water conditions). Thus, the control system can automatically adjust the extension and retraction of the electric cylinder 46 to adjust the compaction force of the extruder 32, avoiding excessive pressure that leads to filter media caking and increased water flow resistance, or insufficient pressure that leads to loose filter media and insufficient filtration efficiency. This ensures that the filter media in the pretreatment tank 21 and the adsorption tank 22 are always in the optimal compaction state. This complements the linkage function of the lifting rod 45 and further improves the consistency and adjustment accuracy of the compaction of the filter media in the two tanks.

[0030] It should be noted that the aforementioned preset optimal compaction pressure threshold for the filter media is not a fixed value, but rather determined based on the specific circumstances of the actual application scenario. Specifically, it takes into account water quality parameters such as the turbidity range, bromide ion content, and suspended solids concentration of the raw water, as well as the inherent characteristics of the filter media, such as the thickness, particle size distribution, and porosity of the PP cotton pretreatment layer in pretreatment tank 21 and the modified activated carbon adsorption layer in adsorption tank 22. A suitable pressure range is determined through preliminary testing, and then the median or optimal test value within this range is set as the preset threshold. For different water supply scenarios (such as advanced municipal tap water treatment, groundwater purification, etc.), different batches of filter media, or different operating stages (newly put into use, mid-term use, near replacement period), the preset pressure threshold can be flexibly adjusted based on actual water quality monitoring data and the condition of the filter media. This ensures that the pressure regulation always matches the actual operating conditions, avoiding inaccurate adjustments due to a fixed threshold setting, and guaranteeing stable operation of the device in various scenarios.

[0031] The specific working steps of the adjustment component are as follows: Step 1: After the device is started, the control system calls the preset optimal compaction pressure threshold of the filter media based on the monitoring data such as raw water turbidity and bromine content. The electric cylinder 46 initially extends and retracts, causing the first connecting rod 43 to swing, which in turn drives the rotating part 41 to rotate. Through the connecting ring 42 and the sliding rod 33, the extrusion part 32 is driven to approach the filter layer 25 and initially compact it. Step 2: The pressure sensor at the bottom of the extrusion part 32 collects pressure data in real time and continuously transmits it to the control system. If the pressure value is lower than the preset threshold, the control system issues a command to make the electric cylinder 46 continue to extend and increase the clamping force; if the pressure value is higher than the preset threshold, the electric cylinder 46 retracts and decreases the clamping force. Step 3: When one set of electric cylinders 46 is activated, the corresponding rotating part 41 drives the lifting rod 45 to move through the second connecting rod 44, thereby pulling the other set of rotating parts 41 to rotate synchronously, so that the extrusion parts 32 in the pretreatment tank 21 and the adsorption tank 22 are raised and lowered synchronously, ensuring that the compaction pressure of the filter layer 25 in the two tanks remains consistent. Step 4: During the filtration process, if the filter media sinks due to wear and tear, the pressure sensor detects a pressure drop, and the control system automatically triggers the electric cylinder 46 to compensate for the pressure drop, driving the extrusion component 32 to move downward to compensate for the amount of compaction and maintain the stability of the filter media compaction. If the raw water conditions change, the filter media compaction can be dynamically adapted by updating the preset pressure threshold.

[0032] In this embodiment, the diameter of the extruder 32 is smaller than the inner diameter of the filter sleeve 31, with a fixed gap between them. The extruder 32 has an L-shaped cross-section, consisting of a horizontal pressure plate and a vertical surrounding edge. The horizontal pressure plate is used to adhere to the filter layer 25, while the vertical surrounding edge is parallel to and opposite to the inner wall of the filter sleeve 31. This gap is configured as an annular channel surrounding the outside of the extruder 32, providing a flow path for impurities that detach during filtration without affecting the lifting and lowering movement of the extruder 32 within the filter sleeve 31, thus preventing impurity accumulation from hindering the movement of the extruder 32.

[0033] A reinforcing crossbar 35 is fixedly installed in the middle of the horizontal pressure plate of the extruder 32. The reinforcing crossbar 35 is made of high-strength metal, and its axis coincides with the central axis of the extruder 32, extending along the diameter of the extruder 32. Both ends are fixedly connected to the vertical perimeter of the extruder 32. The reinforcing crossbar 35 divides the horizontal pressure plate of the extruder 32 into two symmetrical cleaning zones, which correspond to the areas of the filter layer 25, facilitating targeted cleaning of impurities that have detached from the surface of the filter media. A drain notch 36 is provided on the vertical perimeter of the extruder 32 corresponding to the positions of the two cleaning zones. The drain notch 36 penetrates the vertical perimeter, connecting the cleaning zone to the outer annular channel, allowing impurities cleaned by the cleaning component to enter the annular channel through the drain notch 36. A cleaning component is fixedly installed in the middle of the reinforcing crossbar 35. The cleaning component can dynamically clean the surface of the filter layer 25, preventing impurities from adhering to the filter media surface and causing a decrease in filtration efficiency.

[0034] A collection section is provided on the side of the mounting bracket 12 near the filter sleeve 31 to collect impurities discharged from the filter sleeve 31, preventing impurities from scattering and polluting the surrounding environment. A drain port 37 is provided on the lower side wall of the filter sleeve 31 corresponding to the annular channel. The drain port 37 has a tubular structure and is vertically connected to the side wall of the filter sleeve 31. Its internal channel is completely connected to the annular channel, ensuring that impurities in the annular channel can flow smoothly into the drain port 37. The drain port 37 is connected to the collection section via a sealed collection pipe. The collection pipe is a corrosion-resistant flexible hose, adaptable to the spatial layout of the installation location, and its sealing design prevents sewage leakage.

[0035] The height of the drain outlet 37 is adapted to the initial position of the filter layer 25, forming a dynamically adjustable drain structure. When the filter section is not compressed, the filter layer 25 is in a naturally fluffy state, with a relatively high top that can block half of the drain outlet 37. At this time, the water flow velocity in the annular channel is slow, and only a small amount of suspended impurities can be discharged, reducing water loss during normal filtration. When the filter section is compressed, the height of the filter layer 25 decreases after compression, and it can only block one-third of the drain outlet 37. The effective flow area of ​​the drain outlet 37 increases, and with the cleaning action of the cleaning component, impurities detached from the cleaning area, along with some water flow, can be quickly discharged to the collection section, achieving efficient cleaning of impurities while preventing impurities from accumulating in the annular channel.

[0036] The cleaning assembly consists of a sealed housing 51 and a drive motor 52. The sealed housing 51 is made of waterproof and corrosion-resistant material and is bolted to the middle of the reinforcing crossbar 35. Its installation height is higher than the top of the filter layer 25 to avoid contact with the filter layer 25 and affecting the pressing action of the extruder 32. A sealing plate is horizontally arranged inside the sealed housing 51. The sealing plate is bonded to the inner wall of the sealed housing 51 with sealant, and the two together form a sealed cavity. The sealed cavity has good waterproof and dustproof performance and can prevent water flow and impurities from entering the interior. A swing cavity is formed between the lower part of the sealing plate and the upper surface of the reinforcing crossbar 35. The swing cavity provides sufficient space for the swinging action of the cleaning scraper 53, and the swing cavity is interconnected with the cleaning area, which facilitates the contact of the cleaning scraper 53 with the surface of the filter layer 25. The drive motor 52 is fixedly installed in the sealed cavity. The protective function of the sealed cavity can prevent the drive motor 52 from directly contacting water flow and impurities, prevent short circuits or component corrosion, and extend the service life of the drive motor 52. The output shaft end of the drive motor 52 extends into the swing cavity through the reserved through hole on the sealing plate. A sealing gasket is fitted at the through hole to further enhance the sealing effect and prevent water flow from seeping into the sealed cavity.

[0037] Each of the two cleaning zones is equipped with a corresponding cleaning scraper 53. The cleaning scraper 53 is made of wear-resistant plastic, and its length is adapted to the width of the cleaning zone. Its bottom end face can fully fit the surface of the filter layer 25, and can scrape and clean the impurities attached to the surface of the filter material. On both sides of the sealing shell 51, corresponding to the position of the swing cavity, there is a long strip swing groove. The length of the swing groove is adapted to the swing amplitude of the cleaning scraper 53, allowing the cleaning scraper 53 to swing in the groove without getting stuck. The end of the cleaning scraper 53 near the sealing shell 51 extends through the swing groove into the swing cavity, and this end is machined with a locking structure. The output shaft end of the drive motor 52 is fixedly fitted with a connector 54. The connector 54 has a block structure, and its side has a groove adapted to the locking groove of the cleaning scraper 53. The end of the cleaning scraper 53 is locked in the groove of the connector 54 through the locking groove, realizing a stable connection between the two. When the drive motor 52 is working, it can drive the cleaning scraper 53 to swing back and forth along the swing groove through the connector 54, thereby thoroughly scraping and cleaning the surface of the filter layer 25, scraping impurities down to the cleaning area, and preparing for subsequent sewage discharge.

[0038] The reinforcing crossbar 35 is horizontally arranged inside the extrusion part 32 and between two sets of oppositely arranged sliding bars 33, with its extension direction perpendicular to the arrangement direction of the sliding bars 33. The width of the reinforcing crossbar 35 is consistent with the width of the sliding bars 33. After assembly, the two end faces of the reinforcing crossbar 35 are flush with the corresponding sides of the sliding bars 33, forming a flat guide plane together. The guide plane is flush with the upper surface of the horizontal pressure plate of the extruder 32. When the cleaning assembly is working, the drive motor 52 drives the cleaning scraper 53 to swing back and forth along the swing groove through the connector 54 to scrape and clean the surface of the filter layer 25. The scraped-off impurities mix with the water flowing through the cleaning zone. The guide plane can guide both the water flow and the impurities at the same time. It can guide the water flow to flow smoothly along the plane and avoid the formation of eddies at the connection between the reinforcing crossbar 35 and the sliding rod 33, which would affect the removal of impurities. It can also provide a smooth path for the scraped-off impurities and guide the water flow mixed with impurities to gather towards the drain gap 36, so as to avoid the accumulation and retention of impurities at the connection. The drain opening 36 is opened from the guide plane toward the inner wall of the filter sleeve 31 and penetrates the vertical edge of the extrusion member 32, so that the water flow carrying impurities that converges through the guide plane can directly enter the annular channel through the drain opening 36, reducing the obstruction of impurities and water flow. Combined with the scraping action of the cleaning component, it forms an efficient cleaning-guiding-drainage link, improving the overall impurity cleaning efficiency.

[0039] Two sets of drainage notches 36 are respectively set at both ends of the reinforcing crossbar 35, corresponding one-to-one with the two sets of cleaning zones formed by the reinforcing crossbar 35, ensuring that impurities in each cleaning zone can be discharged through the corresponding drainage notch 36. The width of the drainage notch 36 is adapted to the width of the cleaning zone, and its height extends from the guide plane to the bottom of the vertical perimeter of the extrusion part 32, which can maximize the efficiency of impurity flow and avoid impurity blockage due to insufficient notch size. At the same time, the two sets of drainage notches 36 are symmetrically distributed, which can make the impurities in the annular channel evenly distributed, avoiding the accumulation of impurities on one side and affecting the normal operation of the drainage port 37, and working with the collection part to achieve rapid and centralized collection of impurities.

[0040] In the embodiment: the guide plane is flush with the upper surface of the horizontal pressure plate of the extruder 32, which matches the water volume control logic of the cleaning operation. During the cleaning operation, the water volume in the filter sleeve 31 is less than the water volume during normal filtration, and is always kept at half the height of the annular channel above the extruder 32. This setting can minimize the resistance of the water flow to the movement of the cleaning scraper 53, avoid excessive water volume causing impurities to spread with the water flow, and ensure that the water flow can just fully carry the scraped impurities, taking into account both cleaning efficiency and water flow stability.

[0041] When the cleaning component is working, the drive motor 52 drives the cleaning scraper 53 to swing back and forth along the swing groove of the sealed housing 51 through the connector 54. The swing amplitude completely covers the two sets of cleaning zones, which can thoroughly scrape off the impurities attached to the surface of the filter layer 25. At the same time, the guide plane plays a two-way guiding role. On the one hand, it guides the water flow to flow smoothly and avoids the formation of vortices at the connection between the reinforcing crossbar 35 and the sliding bar 33, which would hinder the removal of impurities. On the other hand, it provides a directional flow path for the scraped impurities, guiding the impurity-containing water to flow towards the drain gap 36 for precise convergence. At the same time, during the drainage process, the kinetic energy of the water flow further drives the impurities to quickly pass through the drain gap 36 into the annular channel, forming a closed loop of "scraping-convergence-discharge", which structurally improves the efficiency of impurity cleaning.

[0042] Based on the collaborative concept of full-process anti-clogging, the drive motor 52 and the cleaning scraper 53 do not only operate during cleaning. During normal filtration, they also operate in a low-speed intermittent mode with a lower oscillation frequency than during cleaning. This lightweight operation effectively prevents impurities from prematurely adhering to and penetrating into the filter layer 25, continuously maintaining the filter media permeability, reducing the probability of filter media clogging, and extending the service life of the filter layer 25. No additional backwashing structure is required, simplifying the device's operation and maintenance process. It also achieves deep compatibility with the pressure regulating component's clamping action and the annular channel's drainage function. Through the complementary functions of each structure, a long-term "filtering while preventing clogging" effect is achieved, balancing device operational stability and filter media utilization, highlighting the systematic and forward-looking nature of the overall design.

[0043] Furthermore, a flared groove 55 is provided in the middle of the cleaning scraper 53. The flared groove 55 extends along the length of the cleaning scraper 53, with one end being wider and the other end narrower, forming a natural flare. The narrow end of the flared groove 55 is close to the connection end between the cleaning scraper 53 and the connector 54, while the wide end faces away from the connector 54, and the orientation of the flare is consistent with the side without the drain notch 36. When the cleaning scraper 53 swings back and forth to scrape away impurities, the flared groove 55 can divert the scraped impurities to both sides, guiding them to gather towards the drain notch 36, thus preventing impurities from accumulating below the cleaning scraper 53 and affecting the scraping effect. At the same time, the flared structure can reduce the retention of impurities in the groove, increase the impurity flow rate, and further cooperate with the drain notch 36 and the annular channel to form an efficient cleaning-drainage link.

[0044] like Figure 2 , Figures 4 to 6 As shown, the collection section is the key unit for the centralized collection of impurities in the device. The core includes a collection box 61 and multiple sets of first water pumps 62. The collection box 61 is made of high-strength corrosion-resistant plastic in one piece. The inside of the box is smooth and without dead corners, which facilitates the later cleaning of accumulated impurities and avoids rust or pollution caused by prolonged contact with sewage. An opening is reserved at the top of the box to receive the impurity-containing water flow transported by the pipeline. The side wall is equipped with a sealing interface and a connecting pipe adapter. Meanwhile, a drain port is provided at the bottom of the collection tank 61. When the impurity-laden water pumped by the first water pump 62 enters the collection tank 61, it can undergo natural sedimentation. The settled solid impurities (such as filter media particles and suspended solids in the raw water) will continuously accumulate at the bottom of the collection tank 61. By opening the valve of the drain port, the deposited impurities can be quickly discharged, and cleaning can be completed without disassembling the tank. A water outlet pipe is also provided on one side of the collection tank 61. The water outlet pipe is equipped with a filter screen and a flow control valve. It can be connected to the water inlet 23 of the pretreatment tank 21 through the water outlet pipe, so that the supernatant above the settled impurities can be discharged back into the pretreatment tank 21, thereby restarting the complete filtration process of "pretreatment-bromine reduction-adsorption", improving water resource utilization and reducing wastewater discharge.

[0045] A perforated plate 63 is vertically welded to the side of the mounting bracket 12 near the filter sleeve 31. The perforated plate 63 is made of thick metal sheet, possessing stable load-bearing capacity, and can support the weight of the collection box 61 and the first water pump 62 for a long time without deformation. Multiple sets of positioning holes 64 are evenly spaced on the perforated plate 63. The positioning holes 64 are circular through holes, and the diameter of the holes precisely matches the size of the positioning posts 65 on the collection box 61. Four sets of symmetrically distributed positioning posts 65 are integrally formed on the side of the collection box 61 near the perforated plate 63. The positioning posts 65 are smooth cylindrical protrusions. During assembly, the positioning posts 65 are simply inserted into the corresponding positioning holes 64 of the perforated plate 63 to quickly complete the positioning and installation of the collection box 61 without complicated tools. Moreover, the installation height and horizontal position of the collection box 61 can be adjusted by selecting different positions of the positioning holes 64 according to the site space layout. Disassembly can be performed by simply pulling it upwards, reducing the difficulty of maintenance operations.

[0046] The first water pump 62, as the power core of the sewage discharge process, generates negative pressure suction during operation to accelerate the flow of water containing impurities, ensuring that impurities are quickly discharged from the filter sleeve 31 and preventing accumulation and blockage. The base of the first water pump 62 adopts a thickened design, with multiple sets of positioning through holes 66 on the bottom. The diameter of the positioning through holes 66 is consistent with the positioning holes 64 on the snap-fit ​​plate 63. During assembly, the positioning bolts are passed through the positioning through holes 66 and inserted into the corresponding set of positioning holes 64 on the snap-fit ​​plate 63, thus firmly fixing the first water pump 62 to the snap-fit ​​plate 63. The tight fit between the positioning bolts and the holes effectively prevents the first water pump 62 from shifting due to vibration during operation, ensuring operational stability. The first water pump 62 is connected to the collection tank 61 and the sewage outlet 37 on the filter sleeve 31 through two corrosion-resistant sealing connecting pipes, respectively. The two ends of the connecting pipes are equipped with threaded sealing joints, which, when tightened with the interface, achieve a seamless seal, preventing sewage leakage and pollution of the surrounding environment. In operation, the first water pump 62 starts and creates negative pressure, which draws impurity-containing water from the drain port 37 of the filter sleeve 31 through the connecting pipe, and then transports the impurity-containing water to the collection box 61 for centralized collection through another connecting pipe, forming a complete sewage discharge link of "extraction-transportation-collection", ensuring that impurities are discharged in time and do not affect the normal operation of the filter.

[0047] like Figure 2 , Figure 9As shown, the bromine reduction filtration section, as the core bromine reduction unit of the device, includes a filter tank 701, a support frame 702, and a bromine reduction semi-permeable membrane composite layer 703. The filter tank 701 is made of food-grade corrosion-resistant material, with good sealing performance, capable of withstanding water pressure changes during water treatment, providing a stable sealed environment for the bromine reduction reaction. A first partition 704 is horizontally fixed inside the filter tank 701, with its edge sealed to the inner wall of the filter tank 701, dividing the interior of the filter tank 701 into upper and lower areas: the upper area is the filtration space, and the lower area is the product water collection area. The support frame 702 is vertically installed inside the filter tank 701, and its bottom is fixed to the first partition 704 with bolts to maintain vertical stability. The diameter of the support frame 702 is smaller than the internal diameter of the filter tank 701, with a uniform annular gap between them. This gap is the filtration space, providing sufficient space for the water flow to contact the bromine reduction semi-permeable membrane composite layer 703, ensuring that the water flow can fully pass over the membrane surface to complete the bromine reduction separation.

[0048] The bromine-reducing semi-permeable membrane composite layer 703 adopts a multi-layer composite membrane structure with selective permeability, allowing water molecules to pass through while retaining bromide ions, bromate, and some small organic molecules in the water, thus achieving the core bromine reduction function. This membrane layer is tightly fitted onto the outer surface of the support frame 702, directly contacting the water flow in the filtration space, increasing the contact area between the membrane and the water flow, and improving the bromine reduction separation efficiency. A drainage section 705 is provided at the center of the first partition 704. The drainage section 705 has a tubular structure, with its inlet port extending into the interior of the support frame 702 and its outlet port extending through the first partition 704 to the product water collection area. It is used to guide the qualified product water that has passed through the bromine-reducing semi-permeable membrane composite layer 703 to the product water collection area, and then transport it to the third pre-storage tank 15 through an external pipeline, realizing the separation of product water and concentrate, and avoiding product water contamination by concentrate.

[0049] The support frame 702 adopts a hollow frame structure made of high-strength engineering plastic, which provides sufficient structural strength while reducing resistance to water flow, facilitating the rapid collection of permeate to the drainage section 705. Multiple sets of reinforcing rings 706 are evenly spaced along the length of the support frame 702. These rings are fixedly connected to the inner wall of the support frame 702, enhancing its overall structural strength and resisting the continuous impact of water flow within the filtration space, preventing deformation or tilting and ensuring the stability of the membrane installation position. Furthermore, they provide uniform inner support to the bromine-reducing semi-permeable membrane composite layer 703 fitted on the outside, counteracting the inward force from the water flow pressure outside the membrane, preventing collapse and wrinkling due to excessive water pressure, maintaining the membrane's flatness and effective filtration area, and ensuring stable membrane flux.

[0050] The outer surface of the bromine-reducing semi-permeable membrane composite layer 703, which contacts the filtration space, is provided with continuous groove textures. The grooves extend along the axial direction of the support frame 702, with uniform depth and width distribution. This groove texture can increase the contact area between the membrane surface and the water flow, prolong the residence time of the water flow on the membrane surface, increase the probability of contact between bromine substances and membrane active sites, and enhance the bromine reduction effect. At the same time, the grooves can guide the water flow in a fixed direction, reduce the dead zone of water flow on the membrane surface, avoid the accumulation of impurities in local areas, reduce the membrane fouling rate, and further extend the service life of the bromine-reducing semi-permeable membrane composite layer 703.

[0051] The bromine reduction filtration section also includes a spiral baffle 707, which is made of a flexible and corrosion-resistant material and is spirally fitted onto the outside of the support frame 702, located inside the filtration space. The inner edge of the spiral baffle 707 is attached to the outer surface of the bromine reduction semi-permeable membrane composite layer 703, and the outer edge is attached to the inner wall of the filter tank 701, forming a continuous spiral flow channel partition. A second baffle 708 is also provided inside the filter tank 701. The second baffle 708 is horizontally fitted onto the upper part of the support frame 702 and is sealed to the inner wall of the filter tank 701. Through the cooperation of the spiral baffle 707, the first baffle 704, and the second baffle 708, a complete spiral channel is formed within the filtration space. This channel extends from the bottom to the top of the filter tank 701, with the bottom being the inlet and the top being the outlet. The spiral channel extends the flow path of water within the filtration space, increasing the contact time between the water and the bromine-reducing semi-permeable membrane composite layer 703, thereby improving the separation and removal effect of bromine substances. At the same time, the spiral flow channel can create a swirling flow of water, enhancing the scouring effect on the membrane surface and reducing the adhesion of impurities.

[0052] A Venturi tube 709 is installed at the inlet of the spiral channel. The Venturi tube 709 is a tapered and expanding tubular structure. When water flows through, the diameter of the tube first narrows and then expands, which can increase the flow velocity and turbulence of the water flow. On the one hand, it enhances the scouring force of the water flow on the surface of the bromine-reducing semi-permeable membrane composite layer 703, further reducing membrane fouling; on the other hand, it can allow bromine substances in the water to fully contact the membrane active sites, improving the bromine reduction reaction efficiency. A buffer tank 710 is installed on the upper surface of the second partition 708. The buffer tank 710 is located directly above the outlet of the spiral channel. A through groove is opened at its bottom, which is connected to the outlet of the spiral channel. It can temporarily buffer the concentrated water flowing out of the spiral channel, buffer the water pressure fluctuations, and avoid the pressure shock caused by direct discharge of concentrated water from affecting the overall operational stability of the device. A drain outlet is provided on the side wall of the buffer tank 710. The drain outlet is connected to the second pre-storage tank 14 through a pipeline, and the buffered concentrated water is transported to the second pre-storage tank 14 for subsequent treatment or recycling.

[0053] On the inner edge of the spiral baffle 707, near the side close to the bromine-reducing semi-permeable membrane composite layer 703, multiple sets of turbulent breaking protrusions 711 are uniformly arranged. These protrusions are hemispherical or ellipsoidal in shape, with a diameter controlled at 3–6 mm and a height of 2–4 mm. The distance between the top of the protrusion and the surface of the bromine-reducing semi-permeable membrane composite layer 703 is maintained at 1–3 mm. When water flows along the spiral channel, the turbulent breaking protrusions 711 disrupt the laminar boundary layer of the water flow, creating a micro-turbulent state. This micro-turbulence further enhances the scouring effect on the membrane surface, effectively removing trace impurities and filter cake adhering to the membrane surface, and reducing the membrane fouling rate. Simultaneously, the hemispherical or ellipsoidal protrusion structure does not generate excessive water flow resistance, avoiding impact on the water flow efficiency within the spiral channel. This improves the anti-fouling effect while ensuring stable treatment flux of the device.

[0054] The pre-storage section, serving as the core of the device's water flow scheduling and buffering, consists of a first pre-storage tank 13, a second pre-storage tank 14, and a third pre-storage tank 15. All three tanks employ a sealed tank structure made of food-grade corrosion-resistant stainless steel, possessing excellent pressure-bearing capacity and anti-contamination capabilities to prevent secondary contamination of the water flow. All three tanks are fixedly installed on the base plate 11, with the first pre-storage tank 13 located between the second and third pre-storage tanks 14 and 15, forming a triangular distribution. This layout shortens the pipe connection distance between the tanks, reduces the residence time of water in the pipes, and facilitates pipe layout and subsequent maintenance. It also ensures smoother water flow throughout the entire filtration path, achieving efficient connection of water flow between pretreatment, bromine reduction, and adsorption stages.

[0055] The first pre-storage tank 13 is mainly used to buffer the pretreated water discharged from the pretreatment tank 21, balancing the difference between the effluent flow rate of the pretreatment tank 21 and the influent demand of the bromine reduction filtration section. This prevents sudden changes in raw water turbidity and flow rate from impacting the bromine reduction filtration section and ensures stable operation of the bromine reduction filtration section. The pretreatment tank 21 is connected to the top of the first pre-storage tank 13 through multiple sets of parallel conduits. The conduits are made of corrosion-resistant materials and equipped with valves to control the water flow rate and ensure that the water level in the first pre-storage tank 13 is maintained within a reasonable range. A second water pump 16 is fixedly installed on the base plate 11 at the position between the first pre-storage tank 13 and the filter tank 701. The second water pump 16 serves as the power source for the inlet water of the debromination filtration section. Its inlet port is connected to the bottom of the first pre-storage tank 13 through a conduit, and its outlet port is connected to the Venturi tube 709 on the filter tank 701 through a dedicated conduit. It can stably deliver the water flow buffered in the first pre-storage tank 13 to the spiral channel, providing continuous and stable water flow power for debromination filtration, while also improving the turbulence of the water flow in conjunction with the Venturi tube 709.

[0056] The second pre-storage tank 14 is used to buffer the concentrated water discharged from the bromine reduction filtration section, realizing the recycling and compliant discharge of the concentrated water, reducing water waste, and lowering operating costs. A filtration mechanism 17 is installed on the top of the second pre-storage tank 14. The principle of the filtration mechanism 17 is based on the "physical interception + adsorption synergy" method to treat the concentrated water. First, the sieving action of the filter membrane intercepts suspended impurities and tiny filter cake particles that fall off during the membrane separation process, preventing these impurities from clogging the bromine reduction semi-permeable membrane composite layer 703 after the concentrated water is returned. Then, through the adsorption performance of activated carbon, it specifically adsorbs residual bromide ions, small molecule brominated byproducts, and a small amount of organic matter that have not been completely removed from the concentrated water, further reducing the bromine content in the concentrated water and improving the concentrated water quality to meet the requirements for recirculation and reuse. For example, using a composite structure of filter membrane and activated carbon can further filter suspended impurities and some residual bromine in the concentrated water, improving the concentrated water quality. The inlet port of the filtration mechanism 17 is connected to the drain port on the buffer tank 710 through a conduit to receive the concentrated water discharged from the spiral channel and complete the secondary filtration.

[0057] The concentrated water treated by the filter mechanism 17 is temporarily stored in the second pre-storage tank 14. The second pre-storage tank 14 is connected to the first pre-storage tank 13 through a return pipe. The pipe is equipped with a control valve and an auxiliary water pump. According to the bromine content of the raw water and the quality of the concentrated water, the qualified concentrated water can be returned to the first pre-storage tank 13 to re-enter the bromine reduction process. At the same time, the bottom of the second pre-storage tank 14 is equipped with a discharge port. When the concentration of the concentrated water exceeds the set value, it can be directly discharged through the discharge port to avoid the accumulation of bromine substances caused by the circulation of concentrated water, which would affect the bromine reduction effect.

[0058] The third pre-storage tank 15 is used to buffer the qualified permeate water produced by the bromine reduction filtration section, balancing the permeate water rate of the bromine reduction filtration section with the inlet water rate of the adsorption tank 22, ensuring that the adsorption tank 22 can fully exert its deep adsorption function. The inlet port of the third pre-storage tank 15 is connected to the drain 705 on the filter tank 701 through a conduit, receiving the permeate water after it has permeated through the bromine reduction semi-permeable membrane composite layer 703. Since the permeate water has already undergone core bromine reduction treatment, the third pre-storage tank 15 only serves as a buffer and does not require additional filtration structure. The inside of the tank is smooth and without dead corners, making it easy to clean and maintain. The outlet port of the third pre-storage tank 15 is connected to the top of the adsorption tank 22 through multiple sets of conduits. The conduits are equipped with flow control valves, which can adjust the permeate water delivery rate according to the adsorption load of the filter media in the adsorption tank 22, allowing the permeate water to flow slowly through the modified activated carbon adsorption layer, fully removing residual bromine ions, odor substances, and by-products, ensuring that the final effluent water quality meets the standards, and providing a stable water source for subsequent water supply.

[0059] How to use the device: In use, open the valve between the pretreatment tank 21 and the inlet 23. The raw water to be treated enters the pretreatment tank 21 through the inlet 23, and the second water pump 16 is started at the same time. After the raw water passes through the PP cotton pretreatment layer to intercept large suspended solids and colloids, it flows into the first pre-storage tank 13 for buffering. Then, it is transported by the second water pump 16 to the Venturi tube 709 of the filter tank 701. The core bromine reduction is completed by contacting the bromine-reducing semi-permeable membrane composite layer 703 through the spiral channel.

[0060] Based on the monitoring data of raw water turbidity and bromine content, the pressure regulating component is driven by electric cylinder 46 to adjust the compaction of the filter layer 25 in the pretreatment tank 21 and adsorption tank 22. Electric cylinder 46 drives rotating component 41 to rotate through a connecting rod structure, which in turn drives extrusion component 32 to rise and fall via first connecting rod 43, connecting ring 42 and sliding rod 33. The two sets of rotating components 41 are linked by lifting rod 45 to ensure that the compaction of the filter media in the two tanks is consistent.

[0061] The cleaning assembly is activated periodically. During cleaning, the water level inside the filter sleeve 31 is maintained at half the height of the annular channel. The drive motor 52 drives the cleaning scraper 53 to swing back and forth along the swing groove, scraping off impurities from the surface of the filter layer 25. Guided by the guide plane, the impurities flow with the water through the drain opening 36 into the annular channel, where they are pumped by the first water pump 62 through the drain port 37 to the collection box 61 for centralized collection. During normal filtration, the cleaning assembly can operate intermittently at low speed to prevent impurities from adhering and seeping in.

[0062] The concentrated water produced by the debromination filtration unit flows into the second pre-storage tank 14 through the buffer tank 710. After secondary treatment by the top filtration mechanism 17, if the water quality meets the standards, it is transported to the first pre-storage tank 13 for bromination reduction through the return pipe and auxiliary water pump; if the concentration of the concentrated water exceeds the standard, it is directly discharged by opening the bottom discharge port of the second pre-storage tank 14.

[0063] After bromine reduction, the produced water flows into the third pre-storage tank 15 through the drainage section 705 for buffering. Then, the flow control valve is adjusted according to the filter media load of the adsorption tank 22 to make the produced water slowly flow through the modified activated carbon adsorption layer, deeply removing residual bromine ions and odor substances. Finally, the drinking water that meets the standards is transported to the water storage equipment or water supply pipeline through the outlet 24 of the adsorption tank 22.

[0064] The pipeline connections and component assembly methods between the tanks (pretreatment tank 21, adsorption tank 22, filter tank 701 and each pre-storage tank) disclosed in this embodiment are all common mechanical connection methods in the field of water treatment equipment. As long as smooth water flow and stable structural assembly can be achieved, they can be implemented. In addition, the sensors mentioned in the article for monitoring parameters such as raw water turbidity, bromine content, and water flow pressure are all standard configurations in the water treatment field. Their installation positions and signal transmission methods comply with existing technical specifications, and no further details are provided for the sake of simplicity. Meanwhile, to ensure that the water flow in each stage flows stably along the preset path and meets the requirements of filtration, sewage discharge, circulation and other operating conditions, a booster pump is installed on all pipelines of the device. The selection and installation of each booster pump follow the existing power connection and equipment adaptation technology. The specific structural composition and working principle will not be described in detail in this article.

[0065] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments.

Claims

1. A drinking water debromine filtration device, comprising a base plate (11), characterized in that: A pretreatment tank (21), a bromine reduction filter section, and an adsorption tank (22) are provided above the base plate (11). A mounting frame (12) is provided on the base plate (11). The pretreatment tank (21) and the adsorption tank (22) are respectively mounted on the mounting frame (12). A pressure regulating component is provided above the base plate (11) for adaptively compressing the filter section and for adjusting the compaction of the filter media in the pretreatment tank (21) and the adsorption tank (22) in a linkage manner. The pressure regulating component enables a linkage structure to be formed between the pretreatment tank (21) and the adsorption tank (22). A pre-storage section is provided on the bottom plate (11). The water outlet of the pretreatment tank (21), the water inlet and outlet of the bromine reduction filtration section, and the water inlet of the adsorption tank (22) are interconnected through the pre-storage section to form a filtration path. An inlet end (23) is provided on the pretreatment tank (21), and an outlet end (24) is provided on the adsorption tank (22). Both the pretreatment tank (21) and the adsorption tank (22) are equipped with filter sleeves (31). The filter sleeves (31) are equipped with filter sections for graded interception of suspended solids, organic matter and residual bromine substances. The pressure regulating components are located in the filter sleeves (31) on the pretreatment tank (21) and the adsorption tank (22) respectively, and are in contact with the filter sections.

2. The drinking water debromine filtration device according to claim 1, characterized in that: The filter section includes multiple filter layers (25), which are arranged along the extension direction of the filter sleeve (31) and are bonded together to form a stacked structure. The filter layer (25) inside the filter sleeve (31) on the pretreatment tank (21) is a PP cotton pretreatment layer. Among multiple sets of PP cotton pretreatment layers, the pore size of the upper PP cotton pretreatment layer is larger than that of the lower PP cotton pretreatment layer. The filter layer (25) inside the filter sleeve (31) on the adsorption tank (22) is a modified activated carbon adsorption layer. Among multiple sets of modified activated carbon adsorption layers, the particle size of the upper modified activated carbon adsorption layer is larger than that of the lower modified activated carbon adsorption layer.

3. The drinking water debromine filtration device according to claim 1, characterized in that: The pressure regulating assembly includes a rotating component (41) and an extrusion component (32) disposed inside the filter sleeve (31). The rotating component (41) is mounted on the filter sleeve (31) and is rotatably connected to the filter sleeve (31). The extrusion component (32) is provided with multiple sets of sliding rods (33), which extend upward above the filter sleeve (31), and a connecting ring (42) is provided at the top of the multiple sets of sliding rods (33). The rotating part (41) is located near the edge of the filter sleeve (31). The rotating part (41) is provided with a first connecting rod (43) and a second connecting rod (44). The first connecting rod (43) is connected to the connecting ring (42) through a connecting structure. A lifting rod (45) is provided on one side of the mounting frame (12). The two ends of the lifting rod (45) are respectively connected to the second connecting rod (44) on the two sets of rotating parts (41), so that the rotating parts (41) form a linkage structure. The filter sleeve (31) is provided with a support frame (34) at the top, and an electric cylinder (46) is provided on the support frame (34). The shaft end of the electric cylinder (46) is connected to the first connecting rod (43) through a connecting rod structure, and the connection point on the first connecting rod (43) is close to the end of the first connecting rod (43).

4. The drinking water debromine filtration device according to claim 3, characterized in that: The extruder (32) contacts the top of the filter section, and the diameter of the extruder (32) is smaller than the inner diameter of the filter sleeve (31). At the same time, the cross-section of the extruder (32) is L-shaped, and a gap is formed between the outer wall of the extruder (32) and the inner wall of the filter sleeve (31), and this gap is set as an annular channel. A reinforcing crossbar (35) is provided inside the extrusion part (32). The reinforcing crossbar (35) coincides with the central axis of the extrusion part (32). The reinforcing crossbar (35) divides the extrusion part (32) into two cleaning zones. A drain opening (36) is provided on the extrusion part (32). The cleaning zone is connected to the annular channel through the drain opening (36). A cleaning component is provided on the reinforcing crossbar (35). The mounting bracket (12) has a collection section on one side and a drain outlet (37) on one side of the filter sleeve (31). The drain outlet (37) is connected to the annular channel and is connected to the collection section through a collection pipe. When the filter section is not squeezed, it blocks half of the drain outlet (37). When the filter section is squeezed, it blocks one-third of the drain outlet (37).

5. A drinking water debromine filtration device according to claim 4, characterized in that: The cleaning assembly includes a sealed housing (51) and a drive motor (52). The sealed housing (51) is mounted on the reinforcing crossbar (35), and a sealing plate is provided inside the sealed housing (51). A sealing cavity is formed between the sealing plate and the sealed housing (51), and a swing cavity is formed between the sealing plate and the reinforcing crossbar (35). The drive motor (52) is mounted inside the sealing cavity, and the shaft end of the drive motor (52) extends into the swing cavity. A cleaning scraper (53) is provided in the cleaning area. Swing grooves are provided on both sides of the sealed housing (51). One end of the cleaning scraper (53) extends through the swing groove into the swing cavity. At the same time, a connector (54) is provided at the shaft end of the drive motor (52). One end of the cleaning scraper (53) is locked on the connector (54).

6. A drinking water debromine filtration device according to claim 5, characterized in that: The reinforcing crossbar (35) is located between two sets of opposing sliding bars (33). The width of the reinforcing crossbar (35) is equal to the width of the sliding bar (33), so that the sides of the reinforcing crossbar (35) and the sliding bar (33) are flush with each other and form a guide plane. The sewage discharge opening (36) is opened from the guide plane towards the outside. The two sets of drainage gaps (36) are located at both ends of the reinforcing crossbar (35); The cleaning scraper (53) has an flared groove (55) with one end wider than the other end, and the flared groove faces the side where no sewage outlet (36) is opened.

7. A drinking water debromine filtration device according to claim 4, characterized in that: The collection unit includes a collection box (61) and multiple sets of first water pumps (62). A snap-fit ​​plate (63) is provided on one side of the mounting bracket (12). Multiple sets of positioning holes (64) are provided on the snap-fit ​​plate (63). Multiple sets of positioning posts (65) are provided on one side of the collection box (61). The positioning posts (65) pass through the multiple sets of positioning holes (64), so that the collection box (61) is installed on the snap-fit ​​plate (63). The first water pump (62) has multiple sets of positioning through holes (66). The positioning bolt passes through the positioning through holes (66) and is locked in one of the positioning holes (64), so that the first water pump (62) is installed on the perforated plate (63). The first water pump (62) is connected to the collection box (61) and the drain port (37) on the filter sleeve (31) through the connecting pipe.

8. A drinking water debromine filtration device according to claim 1, characterized in that: The bromine reduction filtration section includes a filter tank (701), a support frame (702), and a bromine reduction semi-permeable membrane composite layer (703). A first partition (704) is provided inside the filter tank (701). The support frame (702) is located inside the filter tank (701) and installed on the first partition (704). The diameter of the support frame (702) is smaller than the internal diameter of the filter tank (701), so that a filtration space is formed between the support frame (702) and the inner wall of the filter tank (701). The bromine-reducing semi-permeable membrane composite layer (703) is sleeved on the outside of the support frame (702). The bromine-reducing semi-permeable membrane composite layer (703) is in contact with the filtration space. The first partition (704) is provided with a drain section (705) for draining the permeate after the bromine-reducing semi-permeable membrane composite layer (703) has passed through it. The drain section (705) is located at the center of the first partition (704) and inside the support frame (702). The support frame (702) is provided with multiple sets of reinforcing rings (706) to strengthen the structure of the support frame (702) and prevent it from being deformed by water flow impact. At the same time, it forms an inner support for the bromine-reducing semi-permeable membrane composite layer (703) and prevents the membrane layer from collapsing. The multiple sets of reinforcing rings (706) are arranged at equal intervals along the length direction of the support frame (702). The surface of the bromine-reducing semi-permeable membrane composite layer (703) that comes into contact with the filtration space is provided with a groove texture.

9. A drinking water debromine filtration device according to claim 8, characterized in that: The bromine reduction filtration section also includes a spiral baffle (707), which is sleeved on the support frame (702) and located in the filtration space. The spiral baffle (707) is in contact with the bromine reduction semi-permeable membrane composite layer (703) on the support frame (702) and the inner wall of the filter tank (701). The filter tank (701) is also provided with a second partition (708), which is sleeved on the support frame (702). The spiral partition (707) forms a spiral channel with the first partition (704) and the second partition (708) in the filter space. The bottom of the spiral channel is set as the water inlet and the top of the spiral channel is set as the water outlet. A Venturi tube (709) is installed at the inlet, and a buffer box (710) is installed on the second partition (708). The buffer box (710) is located at the outlet of the spiral channel and has a through groove to connect it with the spiral channel. A drain outlet is installed on the buffer box (710). Multiple sets of turbulent breaking bosses (711) are provided on the inner side of the spiral partition (707) near the bromine-reducing semi-permeable membrane composite layer (703). The turbulent breaking bosses (711) are hemispherical or ellipsoidal, with a diameter of 3–6 mm and a height of 2–4 mm. The distance between them and the surface of the bromine-reducing semi-permeable membrane composite layer (703) is 1–3 mm.

10. A drinking water debromine filtration device according to claim 9, characterized in that: The pre-storage unit includes a first pre-storage tank (13), a second pre-storage tank (14), and a third pre-storage tank (15), with the first pre-storage tank (13) located between the second pre-storage tank (14) and the third pre-storage tank (15); The first pre-storage tank (13) is used to buffer the water output from the pretreatment tank (21) and stably transport it to the debromination filtration section. The pretreatment tank (21) is connected to the first pre-storage tank (13) through multiple sets of conduits. A second water pump (16) is installed on the bottom plate (11). The second water pump (16) is connected to the venturi tube (709) on the pretreatment tank (21) and the filtration tank (701) respectively. The second pre-storage tank (14) is used to buffer the concentrated water from the bromine reduction filtration section and realize circulation and discharge. A filter mechanism (17) for filtering the concentrated water is provided on it. The filter mechanism (17) is connected to the drain outlet. At the same time, the second pre-storage tank (14) is connected to the first pre-storage tank (13) through a conduit. The third pre-storage tank (15) is used to buffer the water produced by the debromination filtration section and transport it to the adsorption tank (22). The third pre-storage tank (15) is connected to the drainage section (705) on the filter tank (701) and the adsorption tank (22) respectively.

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