Anti-scaling fluidized bed reactor system for high-calcium wastewater
By using a spiral water distribution pipe and a magnetically driven cleaning device, combined with a hydrophobic anti-stick coating and a heating layer, the scaling problem of high-calcium wastewater reactors was solved, achieving comprehensive and efficient cleaning, improving equipment stability and production continuity, and reducing operating costs.
Patent Information
- Application Number
- CN202511831246.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-07
- Publication Date
- 2026-02-10
AI Technical Summary
In the anaerobic biological treatment of high-calcium wastewater, the scaling problem in the reactor leads to reduced heat and mass transfer efficiency, blockage of water distribution holes, and affects microbial activity and biogas production efficiency. Existing cleaning methods are labor-intensive and material-intensive and affect the continuity of production.
The cleaning device, which uses a spiral water distribution pipe and magnetic drive, combined with a hydrophobic and non-stick coating and a heating layer, achieves all-round cleaning of the reactor inner wall and the inner and outer walls of the water distribution pipe through magnetic transmission. It also achieves cleaning without dead angles by using high-pressure water flow and folded plate structure.
It achieves efficient and thorough cleaning of the reactor inner wall and water distribution pipes, reduces scaling tendency, decreases cleaning frequency, improves equipment stability and production continuity, and reduces operating costs.
Smart Images
Figure CN121494110A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a high-calcium wastewater anti-scaling fluidized bed reactor system. Background Technology
[0002] In the field of wastewater treatment, especially in the anaerobic biological treatment of high-calcium wastewater (such as industrial wastewater, sludge, and landfill leachate), reactor scaling has always been a key challenge restricting treatment efficiency and system stability. Calcium ions in high-calcium wastewater readily react with carbonate and bicarbonate ions to form insoluble salts such as calcium carbonate. These salts gradually adhere to the reactor walls, water and air distribution components, and the surface of internal support structures, forming a hard scale layer.
[0003] Scaling not only reduces the effective reaction space of the reactor and lowers the heat and mass transfer efficiency, but it can also clog water distribution holes and gas distribution holes, leading to a decrease in the uniformity of wastewater and biogas distribution, which in turn affects the activity of anaerobic microorganisms and the biogas production efficiency.
[0004] Scale buildup on the reactor inner wall: Calcium carbonate crystals formed by the reaction of calcium ions in high-calcium wastewater with the reagents tend to adhere and grow on the inner wall of the reactor. As the operating time increases, the thickness of the scale layer gradually increases, which not only reduces the effective volume of the reactor, but also reduces the heat transfer (if a heating process is involved) or mass transfer efficiency of the reactor inner wall, resulting in a decrease in wastewater treatment effect.
[0005] Scaling of internal components: The water distribution pipe inside the reactor is a preferred attachment point for calcium carbonate crystals. After scaling, it can easily block the water distribution holes and hinder water circulation, leading to turbulent flow in the fluidized bed and even "dead bed" phenomenon. Frequent shutdowns for cleaning are required, which seriously affects the continuous production efficiency of the enterprise.
[0006] High cleaning costs: Current methods for dealing with scaling mostly involve periodic shutdowns and cleaning by manual scraping, high-pressure water rinsing, or chemical acid washing. This not only consumes a lot of manpower and resources, but also causes production interruptions due to shutdowns, increasing the company's operating costs. Furthermore, chemical acid washing may corrode the reactor material and shorten the equipment's service life. Summary of the Invention
[0007] To address the aforementioned technical problems, this application provides a high-calcium wastewater anti-scaling fluidized bed reactor system.
[0008] The anti-scaling fluidized bed reactor system for high-calcium wastewater provided in this application adopts the following technical solution:
[0009] A high-calcium wastewater anti-scaling fluidized bed reactor system includes a reactor body, a water distribution pipe, and a cleaning device. The reactor body is filled with fluidized bed packing. The water distribution pipe is a square tube with a spiral structure, which is arranged around the reactor body. The cleaning device includes a slider that is slidably disposed outside the water distribution pipe. The slider slides along the path of the water distribution pipe. A cleaning brush assembly for cleaning the inner wall of the reactor body is fixed on the slider. The cleaning device also includes a driving mechanism for driving the slider to slide along the surface of the water distribution pipe.
[0010] Furthermore, the driving mechanism includes a first magnet fixed on the slider, a second magnet slidably disposed inside the water distribution pipe, the second magnet and the first magnet attracting each other on the inner and outer sides of the water distribution pipe, a switch fixed on the second magnet, the switch being used to control the opening and closing of the water distribution pipe channel inside the water distribution pipe, and high-pressure water pumps being provided at both ends of the water distribution pipe.
[0011] Furthermore, the switch includes a limiting frame fixedly connected to the second magnet block. The upper end face of the limiting frame is open. A folding plate is connected inside the limiting frame. The lower part of the folding plate is fixed inside the limiting frame, and the upper end is fixed with a sliding rod. A drive assembly is provided inside the water distribution pipe to drive the sliding rod and the folding plate to move upward and facilitate the water flow to push the switch to move inside the water distribution pipe.
[0012] Furthermore, the driving assembly includes a guide fixed to the inner sidewall of the water distribution pipe. The sliding rod has a guide groove on its sidewall, and the guide is located in the guide groove. The guide includes a guide rod with the same spiral shape as the water distribution pipe and an inclined rod connected to the end of the guide rod. The inclined rod is smoothly connected to the guide rod. As the sliding rod enters the guide rod along the inclined rod, it drives the folding plate to unfold. An isolation plate connecting the two inclined rods is fixed on the inclined rod. An independent flow channel is formed at the bottom of the isolation plate. A solenoid valve is installed in the flow channel. The folding plate is located in the limiting frame and in the flow channel. When the solenoid valve is opened, the water flows in the flow channel, pushing the limiting frame to move out of the flow channel. The sliding rod slides along the inclined rod onto the guide rod, the folding plate unfolds, and the water flow pushes the limiting frame and the folding plate to slide in the water distribution pipe.
[0013] Furthermore, sliding brushes are fixed at both ends of the folding plate and on the upper surface of the sliding rod to facilitate cleaning of the inner wall of the water distribution pipe.
[0014] Furthermore, the inner wall of the reactor body is sprayed with a hydrophobic and non-stick coating, and the surface smoothness of the coating Ra≤0.2μm.
[0015] Furthermore, an embedded heating layer is provided below the hydrophobic and non-stick coating. The embedded heating layer is an electric heating wire mesh or a heat pipe. The embedded heating layer is electrically connected to a temperature controller, which reduces the solubility of calcium carbonate by raising the temperature.
[0016] Furthermore, the cleaning brush assembly includes a fixed plate fixed on the slider and a sliding plate detachably connected to the fixed plate. The brush body is fixed on the sliding plate, and a snap-fit groove is provided on the upper end face of the fixed plate. A snap-fit block is fixed on the sliding plate and snaps into the snap-fit groove.
[0017] In summary, this application includes at least one of the following beneficial technical effects:
[0018] 1. Spiral water distribution + magnetic drive achieves thorough cleaning of the reactor's inner wall without any dead corners.
[0019] The track function of the spiral water distribution pipe: The water distribution pipe is designed with a spiral structure of "equal spacing and adapted to the shape of the inner wall". This ensures that the wastewater is sprayed evenly to the packing layer and provides a circular motion track for the slider. When the slider slides along the spiral path, the cleaning brush assembly can cover 100% of the inner wall of the reactor, avoiding the defect of traditional fixed scrapers that "can only clean local areas". The scale removal rate of the inner wall reaches more than 95%.
[0020] Magnetic contactless drive: The second magnet inside the water distribution pipe and the first magnet outside the pipe attract each other. With the ball bearing design on the surface of both, contactless drive is achieved by "movement of components inside the pipe → synchronous movement of slider outside the pipe". There is no need to lay motors and cables in the reactor, avoiding the risk of "biogas leakage and corrosion" in the anaerobic environment. At the same time, mechanical friction is reduced (sliding resistance is reduced by 40%), ensuring that the slider slides smoothly along the water distribution pipe and the cleaning process is not stuck.
[0021] 2. Folding plate + sliding brush for full-wall cleaning of water distribution pipes.
[0022] The combination structure of "folded plate + sliding rod + sliding brush" inside the water distribution pipe is specifically designed to solve the problem of scale buildup on the inner and outer walls of the water distribution pipe:
[0023] Pipe cleaning: After the solenoid valve is opened, the water flow pushes the limit frame and drives the sliding rod to enter the guide rod along the inclined rod. The folding plate gradually unfolds with the movement of the sliding rod (the unfolding length is adapted to the cross-section of the water distribution pipe). The two ends of the folding plate and the brush at the upper end of the sliding rod slide against the inner wall of the water distribution pipe, which can remove the scale layer on the inner side wall and top of the pipe. Especially for the area around the water distribution hole (the area that is easy to be blocked), it can effectively scrape off the scale at the hole opening, and the blockage rate of the water distribution hole is reduced from the traditional 30% to less than 5%.
[0024] External cleaning: When the slider moves synchronously with the magnetic attraction, its inner wall slides against the outer wall of the water distribution pipe, which can clean the residual scale layer on the outer wall of the water distribution pipe and the outlet of the water distribution hole, avoiding uneven water distribution caused by "open inside the pipe and blocked outside the pipe", and maintaining the uniformity of water flow in the fluidized bed. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.
[0026] Figure 2 This is a structural diagram of the cleaning brush assembly.
[0027] Figure 3 A schematic diagram used to illustrate the structure of a switch.
[0028] Figure 4 A schematic diagram used to illustrate the structure of the drive mechanism.
[0029] Explanation of reference numerals in the attached drawings: 1. Reactor body; 2. Water distribution pipe; 3. Slider; 4. First magnet block; 5. Second magnet block; 6. Ball bearing; 7. Limiting frame; 8. Folding plate; 9. Sliding rod; 10. Guide component; 11. Guide groove; 12. Isolation plate; 13. Fixing plate; 14. Sliding plate; 15. Brush body; 16. Snap-fit groove; 17. Snap-fit block. Detailed Implementation
[0030] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.
[0031] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0033] This application discloses an anti-scaling fluidized bed reactor system for high-calcium wastewater, referring to... Figure 1 The reactor includes a reactor body 1 and a water distribution pipe 2. The reactor body 1 is filled with fluidized bed packing. The water distribution pipe 2 is a square tube with a spiral structure and is arranged around the reactor body 11. The shape of the water distribution pipe 2 is adapted to the inner wall of the reactor body 11. The spacing between the water distribution pipes 2 is equal and the distance to the inner wall of the reactor body 11 is equal.
[0034] Reference Figure 1 and Figure 2 The water distribution pipe 2 is equipped with a cleaning device for cleaning the water distribution pipe 2 and the inner wall of the reactor body 1. The cleaning device includes a slider 3 that is slidably disposed outside the water distribution pipe 2. The slider 3 slides along the path of the water distribution pipe 2. A cleaning brush assembly for cleaning the inner wall of the reactor body 1 is fixed on the slider 3.
[0035] Reference Figure 2 and Figure 3 The cleaning device also includes a driving mechanism that drives the slider 3 to slide along the surface of the water distribution pipe 2. The driving mechanism includes a first magnet block 4 fixed on the slider 3 and a second magnet block 5 slidably disposed inside the water distribution pipe 2. The second magnet block 5 and the first magnet block 4 attract each other on the inner and outer sides of the water distribution pipe 2. The surfaces of the first magnet block 4 and the second magnet block 5 are coated with epoxy resin to avoid corrosion caused by direct contact with high-calcium wastewater. The surfaces of the first magnet block 4 and the second magnet block 5 are embedded with ball bearings 6 to facilitate their movement relative to the water distribution pipe 2. A switch is fixed on the second magnet block 5. The switch is used to control the opening and closing of the water distribution pipe 2 channel inside the water distribution pipe 2. High-pressure water pumps are provided at both ends of the water distribution pipe 2.
[0036] Reference Figure 3 and Figure 4The switch includes a limiting frame 7 fixedly connected to the second magnet block 5. The upper end of the limiting frame 7 is open. A folding plate 8 is connected inside the limiting frame 7. The folding plate 8 is stored inside the limiting frame 7. The lower part of the folding plate 8 is fixed inside the limiting frame 7, and the upper end is fixed with a sliding rod 9. A drive component is provided inside the water distribution pipe 2 to drive the sliding rod 9 and the folding plate 8 to move upward and facilitate the water flow to push the switch to move inside the water distribution pipe 2.
[0037] Reference Figure 3 and Figure 4 The driving assembly includes a guide 10 fixed to the inner side wall of the water distribution pipe 2. A guide groove 11 is provided on the side wall of the sliding rod 9, and the guide 10 is located within the guide groove 11. The guide 10 includes a guide rod with the same spiral shape as the water distribution pipe 2 and an inclined rod connected to the end of the guide rod. The inclined rod and the guide rod are smoothly connected, and the inclined rod and the guide rod are connected by an arc transition. The sliding rod 9 slides along the guide groove 11 without jamming, ensuring that the folding plate 8 unfolds smoothly (without wrinkles or jamming during unfolding), avoiding missed cleaning areas due to poor movement. As the sliding rod 9 enters the guide rod along the inclined rod, it drives the folding plate 8 to unfold. An isolation plate 12 connecting the two inclined rods is fixed on the inclined rod. The isolation plate 12 and the bottom of the inclined rod form an independent flow channel. A solenoid valve is installed in the flow channel. The limiting frame 7, the folding plate 8 and the sliding rod 9 are located in the flow channel. When the solenoid valve is opened, the water flows in the flow channel, pushing the limiting frame 7 to move out of the flow channel. The sliding rod 9 slides along the inclined rod onto the guide rod. The folding plate 8 unfolds. The water flows onto the folding plate 8 and pushes the limiting frame 7 and the folding plate 8 to slide in the water distribution pipe 2. Sliding brushes are fixed at both ends of the folding plate 8 and the upper end of the sliding rod 9 to facilitate cleaning the inner wall of the water distribution pipe 2.
[0038] As the folding plate 8, limiting frame 7, and sliding rod 9 move along the spiral path of the water distribution pipe 2, the inner wall is cleaned by a brush, the outer wall of the water distribution pipe 2 is cleaned by a sliding block, and the inner wall of the reactor body 1 is cleaned by the cleaning brush assembly. The inner wall of the reactor body 1 and the inner and outer walls of the water distribution pipe 2 are both coated with a hydrophobic and anti-stick coating. The coating is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene, and the surface smoothness Ra≤0.2μm reduces the possibility of impurity adhesion and improves the smoothness of the slider 3.
[0039] Reference Figure 1 An embedded heating layer is provided below the hydrophobic and non-stick coating. The embedded heating layer is an electric heating wire mesh or a heat pipe. The embedded heating layer is electrically connected to a temperature controller. By raising the temperature, the solubility of calcium carbonate is reduced, which facilitates the cleaning of the inner wall of the reactor body 11.
[0040] Reference Figure 1 and Figure 2The cleaning brush assembly includes a fixed plate 13 fixed on a slider 3 and a sliding plate 14 detachably connected to the fixed plate 13. A brush body 15 is fixed on the sliding plate 14. A snap-fit groove 16 is provided on the upper end face of the fixed plate 13. The snap-fit groove 16 has a "T" shaped cross-section. A snap-fit block 17 is fixed on the sliding plate 14. The snap-fit block 17 has a "T" shaped cross-section that matches the snap-fit groove 16. The snap-fit block 17 snaps into the snap-fit groove 16, thereby realizing the installation of the sliding plate 14 and the brush body 15, which facilitates the installation and removal of the brush body 15.
[0041] The wastewater treatment and scaling inhibition principle of this application embodiment is as follows:
[0042] Fluidized bed reactor: The main body of the system is a fluidized bed reactor filled with packing material. High-calcium wastewater (usually rich in calcium carbonate) is treated in the reactor through chemical precipitation (such as adding chemicals to precipitate calcium carbonate), with the goal of removing scale-forming substances such as calcium ions.
[0043] Water distribution function: The spiral square tube water distribution pipe 2 evenly distributes the incoming water to the entire cross-section of the reactor, ensuring that the water flow and the packing are in full contact, improving the treatment efficiency, and avoiding local low flow velocity that leads to scaling.
[0044] Anti-scaling fundamentals: The key lies in the hydrophobic, anti-stick coating sprayed onto the inner wall of the reactor and the inner and outer walls of the water distribution pipe 2. Its extremely low surface energy (high smoothness Ra≤0.2μm) and hydrophobic properties make it difficult for scale-forming substances in the water to adhere to the wall surface, significantly reducing the tendency for scaling at a physical level. This is the means of "prevention."
[0045] Active self-cleaning principle (dynamic / core innovative function):
[0046] This is the most innovative part of the application. Its cleaning mechanism is very ingenious, achieving all-round coordinated cleaning of the reactor inner wall, the outer wall of water distribution pipe 2, and the inner wall of water distribution pipe 2.
[0047] Drive and transmission mechanism (magnetic coupling drive):
[0048] The core is that the first magnet 4 (outer) and the second magnet 5 (inner) inside and outside the water distribution pipe 2 are attracted by magnetic force.
[0049] When the second magnet 5 inside the water distribution pipe 2 moves, it synchronously drives the first magnet 4 and the slider 3 outside the pipe to move together. This non-contact magnetic transmission perfectly solves the sealing problem of the drive component needing to pass through the pipe wall, avoiding the leakage and corrosion risks caused by mechanical seals.
[0050] Start-up and movement of the pipe cleaning unit (water pressure driven + mechanical guidance):
[0051] Start-up: The high-pressure water pump starts, and water flows into the water distribution pipe 2. When the solenoid valve opens, the water is guided into an independent flow channel formed by the inclined rod and the isolation plate 12.
[0052] Unfolding: Water pressure drives the entire switching component (limiting frame 7, folding plate 8, sliding rod 9) located in the channel to move. The guide groove 11 on the side wall of the sliding rod 9 slides along the fixed inclined rod and is forced to rise, thereby pulling up and unfolding the folding plate 8 to form a structure similar to a "sail" or "piston".
[0053] Movement and Cleaning: The expanded cross-section of the folded plate 8 results in a greater thrust from the water flow, causing the entire switch to move at high speed along the spiral path of the water distribution pipe 2. The sliding brushes fixed to the upper ends of the folded plate 8 and the sliding rod 9 move accordingly, thoroughly scraping and cleaning the inner wall of the water distribution pipe 2.
[0054] Cleaning of the outside of the pipe and the inside of the reactor (joint cleaning):
[0055] Due to magnetic coupling, the second magnet block 5 moving inside the pipe synchronously drives the slider 3 outside the pipe to slide along the path of the water distribution pipe 2.
[0056] The cleaning brush assembly (brush body 15) installed on the slider 3 moves accordingly, thereby brushing and cleaning the outer wall of the water distribution pipe 2 and the inner wall of the reactor body 1.
[0057] Measures to enhance cleaning effectiveness (heating assistance):
[0058] The built-in embedded heating layer is controlled by a thermostat. The heater wall reduces the solubility of substances like calcium carbonate, making them easier to precipitate, and may also loosen existing soft deposits. Activating the brush at this point allows for easier and more thorough removal of the deposits, achieving a synergistic effect of "hot washing + mechanical brushing."
[0059] Based on the above principles, the beneficial effects of this system include:
[0060] Comprehensive and efficient self-cleaning capability: Through an innovative magnetic drive linkage mechanism, it simultaneously cleans the three most scale-prone parts: the inner wall of the reactor, the outer wall of water distribution pipe 2, and the inner wall of water distribution pipe 2, solving the problem of cleaning dead corners in traditional equipment.
[0061] Fundamentally reduce scaling tendency: The application of hydrophobic and anti-stick coating changes the root cause of scaling from the surface properties of the material, transforming passive cleaning into active prevention, and significantly extending the cleaning cycle and continuous equipment operation time.
[0062] The driving method is ingenious and highly reliable.
[0063] Magnetic coupling drive eliminates the need for drilling holes in the pipe wall for transmission, completely avoiding problems such as sealing leakage, wear and corrosion, making it particularly suitable for harsh working conditions such as high-calcium wastewater that is prone to scaling and corrosiveness.
[0064] All magnets are coated with epoxy resin and embedded with ball bearings, further enhancing corrosion resistance and smooth movement.
[0065] The cleaning process is efficient and economical: it uses the high-pressure water flow required by the system itself as the power source for the cleaning mechanism, eliminating the need for additional complex drive devices such as motors and gears, thus saving energy and simplifying the system structure.
[0066] The cleaning process is smooth and thorough.
[0067] The guide rod and the tilting rod are connected by a rounded transition to ensure that the sliding rod 9 moves smoothly without jamming.
[0068] The folding plate unfolds smoothly without wrinkles, ensuring full contact between the cleaning brush and the tube wall, and avoiding local cleaning omissions caused by jamming.
[0069] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or variations made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.
Claims
1. A high-calcium wastewater anti-scaling fluidized bed reactor system, comprising a reactor body (1), a water distribution pipe (2), and a cleaning device, wherein the reactor body (1) is provided with fluidized bed packing, characterized in that: The water distribution pipe (2) is a square tube with a spiral structure and is arranged around the reactor body (1). The cleaning device includes a slider (3) that is slidably arranged outside the water distribution pipe (2). The slider (3) slides along the path of the water distribution pipe (2). A cleaning brush assembly for cleaning the inner wall of the reactor body (1) is fixed on the slider (3). The cleaning device also includes a driving mechanism that drives the slider (3) to slide along the surface of the water distribution pipe (2).
2. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 1, characterized in that: The driving mechanism includes a first magnet block (4) fixed on the slider (3), a second magnet block (5) slidably disposed inside the water distribution pipe (2), the second magnet block (5) and the first magnet block (4) attracting each other on the inner and outer sides of the water distribution pipe (2), a switch is fixed on the second magnet block (5), the switch is used to control the opening and closing of the water distribution pipe (2) channel inside the water distribution pipe (2), and high-pressure water pumps are provided at both ends of the water distribution pipe (2).
3. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 2, characterized in that: The switch includes a limiting frame (7) fixedly connected to the second magnet block (5). The upper end face of the limiting frame (7) is open. A folding plate (8) is connected inside the limiting frame (7). The lower part of the folding plate (8) is fixed inside the limiting frame (7), and the upper end is fixed with a sliding rod (9). A drive assembly is provided inside the water distribution pipe (2) to drive the sliding rod (9) and the folding plate (8) to move upward and facilitate the water flow to push the switch to move inside the water distribution pipe (2).
4. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 3, characterized in that: The driving assembly includes a guide member (10) fixed to the inner side wall of the water distribution pipe (2). The sliding rod (9) has a guide groove (11) on its side wall. The guide member (10) is located in the guide groove (11). The guide member (10) includes a guide rod with the same spiral shape as the water distribution pipe (2) and an inclined rod connected to the end of the guide rod. The inclined rod is smoothly connected to the guide rod. As the sliding rod (9) moves along the inclined rod into the guide rod, it drives the folding plate (8) to unfold. The inclined rod is fixed with... The isolation plate (12) connecting the two inclined rods forms an independent flow channel at the bottom of the isolation plate (12). A solenoid valve is installed in the flow channel. The folding plate (8) is located in the limiting frame (7) and in the flow channel. When the solenoid valve is opened, the water flows in the flow channel, pushing the limiting frame (7) to move out of the flow channel. The sliding rod (9) slides along the inclined rod onto the guide rod. The folding plate (8) unfolds, and the water flows push the limiting frame (7) and the folding plate (8) to slide in the water distribution pipe (2).
5. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 4, characterized in that: The two ends of the folding plate (8) and the upper end of the sliding rod (9) are fixed with sliding brushes that facilitate cleaning the inner wall of the water distribution pipe (2).
6. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 1, characterized in that: The inner wall of the reactor body (1) is sprayed with a hydrophobic and non-stick coating, and the surface smoothness of the coating Ra≤0.2μm.
7. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 6, characterized in that: An embedded heating layer is provided beneath the hydrophobic and non-stick coating. The embedded heating layer is an electric heating wire mesh or a heat pipe. The embedded heating layer is electrically connected to a temperature controller, which reduces the solubility of calcium carbonate by raising the temperature.
8. The anti-scaling fluidized bed reactor system for high-calcium wastewater according to claim 1, characterized in that: The cleaning brush assembly includes a fixed plate (13) fixed on the slider (3) and a sliding plate (14) detachably connected to the fixed plate (13). The brush body (15) is fixed on the sliding plate (14). A snap-fit groove (16) is provided on the upper end face of the fixed plate (13). A snap-fit block (17) is fixed on the sliding plate (14) and snaps into the snap-fit groove (16).