Sun-shading and algae-preventing device for intermediate sedimentation tank in sewage treatment plant

Abstract

The application discloses a sunshade algae-preventing device for an intermediate sedimentation tank in a sewage treatment plant, which is composed of a plurality of modular sunshade net boards covering the annular water surface of the intermediate sedimentation tank. The sunshade net boards are composed of a group of standardized telescopic frame components capable of being independently adjusted in length and quickly installed, U-shaped fastening buckles and sunshade nets, and form customized seamless coverage of the annular area of the tank surface. The telescopic frame is capable of being infinitely adjusted in length through a built-in screw mechanism, so as to adapt to different tank diameters, and the both ends of the telescopic frame are respectively provided with a tank body fixing seat fixed to the tank wall and an elastic baffle fixing claw clamped with a scum baffle. The sunshade net is quickly clamped and fixed through the U-shaped fastening buckles distributed on the frame, and the splicing sides of adjacent net boards are tightly connected and sealed through magnetic attraction components. The application realizes full coverage and high sealing sunshade of the annular area of the sedimentation tank, inhibits the growth of algae from the root, and has the advantages of quick installation, strong adaptability, convenient maintenance and stable structure.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a shading and algae prevention facility for intermediate sedimentation tanks in wastewater treatment. Background Technology

[0002] Wastewater treatment plants often face the problem of excessive algae growth in intermediate sedimentation tanks during the summer. High temperatures and ample sunlight create ideal conditions for algae growth, causing them to adhere to sludge scrapers, effluent channels, and other surfaces, severely impacting the appearance of the tank surface and hindering normal operation. Algae growth triggers a series of problems: clogging of effluent weirs and siphon return pipes, affecting sludge return concentration; significantly increasing manual cleaning and maintenance costs; corrosion of concrete tank walls, accelerating structural aging; and decaying algae affecting effluent quality, color, and disinfection effectiveness, further increasing treatment costs.

[0003] Currently, the main approach relies on frequent manual dredging and cleaning, but this method is labor-intensive, poses safety hazards, and only addresses the symptoms, not the root cause. Therefore, there is an urgent need for a low-cost, easy-to-maintain solution that can fundamentally inhibit algae growth.

[0004] Chinese patent CN222293867U discloses a wastewater treatment tank. By installing columns at the four corners of a rectangular tank, with suspended steel wire ropes installed on adjacent columns, and connecting them to a shade net, the tank is physically covered, thereby reducing algae growth on the tank surface.

[0005] While the aforementioned patent can inhibit algae growth, the current technical solution is not comprehensive and has the following drawbacks: For circular pools, algae only grow in the outer ring area, and the device cannot effectively cover them. In harsh climates, wind and snow can severely damage the shade net's normal function. Even with the four corner posts raising the shade net, ample sunlight in summer allows for oblique penetration into the pool, still promoting algae growth. Frequent manual cleaning of the pool and replacement of the shade net are necessary, which is time-consuming, labor-intensive, and increases operating costs.

[0006] To solve the above problems, there is an urgent need for a shading and algae prevention technology for intermediate sedimentation tanks in wastewater treatment plants. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention proposes a shading and algae prevention device for intermediate sedimentation tanks in wastewater treatment plants. This device utilizes a standardized, retractable frame assembly with independently adjustable length and quick installation, along with U-shaped fixing clips and a shading net, to form a customized, seamless coverage of the annular area of ​​the tank surface. This completely blocks the photosynthetic environment for green algae, effectively inhibiting algae growth and solving a series of operational and maintenance problems caused by algae growth. Simultaneously, it prevents windy and snowy weather from affecting the normal operation of the shading device.

[0008] The present invention provides a shading and algae prevention device for an intermediate sedimentation tank in a sewage treatment plant, which consists of several shading net panels (1) covering an annular pool formed by a scum baffle and the sedimentation tank wall. The shading net panel (1) is composed of a U-shaped fixing buckle (2), a fixing frame (3), a length adjustment mechanism (4), a pool body fixing seat (5), a shading net (8), a baffle fixing claw (9), a frame connector (13), and a fixing net clip (14). The U-shaped fixing buckle (2) includes a U-shaped fixing plate (2.1), a rubber plate (2.2), a fastening bolt (2.3), and a fixing threaded hole (2.4). A fixing threaded hole (2.4) that engages with the fastening bolt (2.3) is opened in the middle of the fixing plates on both sides of the U-shaped fixing plate (2.1). A rubber plate (2.2) is set at the top and bottom of the U-shaped groove of the U-shaped fixing plate (2.1). The U-shaped fixing buckle (2) is fixed to the inner side of the telescopic frame (10) as a whole.

[0009] The fixed frame (3) consists of two retractable frame sides (10), a fan-shaped inner frame (11) and a fan-shaped outer frame (12). The frame sides are connected and fixed together by the frame connector (13) and the U-shaped fixing buckles (2) at both ends of the retractable frame (10).

[0010] Furthermore, several U-shaped fixing buckles (2) and fixing mesh clips (14) are evenly arranged on the retractable frame (10), the fan-shaped inner frame (11) and the fan-shaped outer frame (12) on both sides, and are fixed together.

[0011] Furthermore, the shade net (8) is fixed together by the U-shaped fixing buckle (2) on the retractable frame (10) and the fixing net clip (14) set on the inner frame (11) and outer frame (12).

[0012] The edge of the shade net (8) is inserted between the upper and lower rubber plates (2.2) in the U-shaped groove of the U-shaped fixing plate (2.1). The shade net (8) is clamped and fixed by using fastening bolts (2.3) and fixing threaded through holes (2.4) to press against the upper rubber plate (2.2). The upper and lower fan-shaped edges of the shade net (8) are clamped and stretched on the fixing frame (3) by fixing net clips (14). The retractable frame (10) consists of two frame sections, upper and lower, with a length adjustment mechanism (4) in the middle. The length adjustment mechanism (4) includes an adjustment screw (4.1), an adjustment threaded hole (4.2), and a multi-faceted adjustment handle (4.3). An adjustment threaded hole (4.2) that engages with the adjustment screw (4.1) is provided at the center of the corresponding ends of the upper and lower frame sections. A multi-faceted adjustment handle (4.3) is provided in the middle section of the adjustment screw (4.1). A magnetic strip (6) is longitudinally provided on the outer side of the retractable frame (10) on one side of the fixed frame (3).

[0013] One end of the retractable frame (10) is provided with a baffle fixing claw (9) for fixing with the scum baffle, and the other end is provided with a pool body fixing seat (5) for fixing with the pool wall.

[0014] Furthermore, the sunshade net (1) is fixed to the pool wall using the pool body fixing seat (5) and the pool wall fixing bolts (7).

[0015] The baffle fixing claw (9) consists of a baffle (9.1), a slide (9.2), a telescopic claw (9.3), and a telescopic spring (9.4). A slide (9.2) is provided in the fixed end of the scum baffle of the retractable frame (10), and a baffle (9.1) is provided at its end. The telescopic claw (9.3) is embedded in the slide (9.2), and the two ends of the telescopic spring (9.4) are fixed to the retractable frame (10) and the fixed telescopic claw (9.3) respectively.

[0016] Compared with the prior art, the shading and algae prevention device for intermediate sedimentation tanks in wastewater treatment plants of the present invention has the following beneficial effects: 1. Strong on-site adaptability and high installation precision: The telescopic frame is infinitely adjustable and can perfectly adapt to sedimentation tanks of different diameters, ensuring tight coverage without any gaps.

[0017] 2. Modular design for easy assembly, disassembly and maintenance: All columns are standard parts and the shade net is a unitized sheet material. Local damage can be replaced individually, which greatly facilitates transportation, storage and later maintenance.

[0018] 3. Strong connection and good sealing: The U-shaped fixing buckle ensures that the sunshade net is wind-resistant, taut and does not loosen; the unique retractable frame magnetic closure design achieves a tight and quick seal at the beginning and end of the ring cover, effectively preventing light leakage.

[0019] 4. Stable structure and excellent durability: The main body is made of metal profiles, which have high strength, strong resistance to deformation, and excellent weather resistance and corrosion resistance.

[0020] 5. Significant overall benefits: After a one-time installation, it can achieve a long-term maintenance-free algae-blocking effect, completely eliminating the need for frequent manual cleaning, and offering both safety and economy. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The accompanying drawings are for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention.

[0022] Figure 1 This is a top-view schematic diagram illustrating the application effect of the present invention.

[0023] Figure 2 This is a schematic diagram of the sunshade mesh structure of the present invention.

[0024] Figure 3 This is a structural diagram of the U-shaped fixing buckle of the present invention.

[0025] Figure 4 This is a structural diagram of the fixing mesh clip of the present invention.

[0026] Figure 5 This is a schematic diagram showing the fixing relationship between the U-shaped fixing buckle and the frame connector of the present invention.

[0027] Figure 6 This is a schematic diagram of the retractable frame length adjustment mechanism of the present invention.

[0028] Figure 7 This is a schematic diagram of the baffle fixing claw structure of the present invention.

[0029] Figure 8 This is a schematic diagram of the pool body fixing base and the pool body fixing according to the present invention.

[0030] Figure 9 This is a front view cross-sectional diagram of a sewage sedimentation tank with a sunshade net installed.

[0031] Reference numerals: 1. Shade net, 2. U-shaped fixing buckle, 2.1. U-shaped fixing plate, 2.2. Rubber plate, 2.3. Fastening bolt, 2.4. Fixing threaded hole, 3. Fixing frame, 4. Length adjustment mechanism, 4.1. Adjusting screw, 4.2. Adjusting threaded hole, 4.3. Multi-faceted adjusting handle, 5. Pool body fixing seat, 5.1. Fixing hole, 6. Magnetic strip, 7. Pool wall fixing bolt, 8. Shade net, 9. Baffle fixing claw, 9.1. Baffle platform, 9.2. Slide, 9.3. Telescopic claw, 9.4. Telescopic spring, 10. Telescopic frame, 11. Fan-shaped inner frame, 12. Fan-shaped outer frame, 13. Frame connector, 14. Fixing net clip. Detailed Implementation

[0032] The specific embodiments of the present invention are described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Unless otherwise specified, all materials used in the following examples are commercially available.

[0034] like Figure 1 , 2 As shown, this invention discloses a shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant. The device consists of a standardized, retractable frame assembly with independently adjustable length and quick installation, a U-shaped fixing clip, and a shading net. This shading net is installed in the annular area between the scum baffle and the inner edge of the intermediate sedimentation tank, forming a customized, seamless coverage of the annular area. By physically shading the annular water surface of the intermediate sedimentation tank, sunlight is blocked, inhibiting the photosynthesis and growth of green algae at its source. This solves various operational problems caused by algae growth, reduces maintenance costs, and ensures stable effluent quality.

[0035] A shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant consists of several shading net panels 1 covering an annular pool formed by a scum baffle and the sedimentation tank wall. The shading net panel 1 is composed of a U-shaped fixing buckle 2, a fixing frame 3, a length adjustment mechanism 4, a pool body fixing seat 5, a shading net 8, and a baffle fixing claw 9.

[0036] like Figure 2 , 3 As shown in Figures 4 and 5, the U-shaped fixing buckle 2 includes a U-shaped fixing plate 2.1, a rubber plate 2.2, a fastening bolt 2.3, and a fixing threaded hole 2.4. A fixing threaded hole 2.4, which engages with the fastening bolt 2.3, is opened in the middle of the fixing plates on both sides of the U-shaped fixing plate 2.1. A rubber plate 2.2 is placed at the top and bottom of the U-shaped groove of the U-shaped fixing plate 2.1. The U-shaped fixing buckle 2 is fixed to the inner side of the retractable frame 10 using a welding process. The U-shaped fixing plate 2.1 is preferably made of stainless steel. The U-shaped fixing buckle 2 has two functions: firstly, to fix the sunshade net 8; and secondly, to cooperate with the frame connector 13 to connect and fix the fixing frame 3.

[0037] The fixed frame 3 consists of two retractable frame sides 10, a fan-shaped inner frame side 11, and a fan-shaped outer frame side 12. The frames are connected and fixed together using frame connectors 13 and U-shaped fixing clips 2 at both ends of the retractable frame sides 10. The curvature of the fan-shaped inner frame side 11 and the fan-shaped outer frame side 12 matches the curvature of the scum baffle and the sedimentation tank wall, respectively. Several U-shaped fixing clips 2 and fixing net clips 14 are evenly arranged on the retractable frame sides 10, the fan-shaped inner frame side 11, and the fan-shaped outer frame side 12. The shade net 8 is fixed together using the U-shaped fixing clips 2 on the retractable frame side 10 and the fixing net clips 14 installed on the fan-shaped inner frame side 11 and the fan-shaped outer frame side 12. The two sides of the shade net 8 are inserted between the upper and lower rubber plates 2.2 in the U-shaped groove of the U-shaped fixing plate 2.1, and the shade net 8 is clamped and fixed by using fastening bolts 2.3 and fixing threaded through holes 2.4 to press down the upper rubber plate 2.2. The upper and lower fan-shaped edges of the shade net 8 are clamped and tightened onto the fixed frame 3 using fixing clips 14. U-shaped fixing buckles 2 and fixing clips 14 are used to secure the shade net 8, making maintenance and replacement easier. To achieve waterproof and corrosion-resistant effects, the telescopic frame 10 is preferably made of stainless steel square tubing, and the inner and outer fan-shaped frames 11 and 12 are preferably made of stainless steel round tubing. The U-shaped fixing plate 2.1 is fixed to the fixed frame 3 using stainless steel welding. The shade net 8 uses a high-light-blocking black polyethylene or polyester woven mesh.

[0038] like Figure 2 , 6 As shown, the retractable frame 10 consists of upper and lower frame sections, with a length adjustment mechanism 4 located in the middle. The length adjustment mechanism 4 includes an adjusting screw 4.1, an adjusting threaded hole 4.2, and a multi-faceted adjusting handle 4.3. Adjusting threaded holes 4.2, engaging with the adjusting screw 4.1, are located at the center of corresponding ends of the upper and lower frame sections. A multi-faceted adjusting handle 4.3 is located in the middle section of the adjusting screw 4.1. A magnetic strip 6 is longitudinally arranged on the outer edge of one side of the retractable frame 10 on the fixed frame 3, enabling the two sunshade net panels 1 to be sealed through magnetic attraction between the magnet and the metal, thus completing the closed coverage of the entire annular pool area. By inserting both ends of the adjusting screw 4.1 into the adjusting threaded holes 4.2 of the two frame sections respectively, and rotating the multi-faceted adjusting handle 4.3 with a wrench, the two retractable frame sections 10 can be connected, and the length of the retractable frame 10 can be infinitely adjusted. The retractable frame design allows for applications in intermediate sedimentation tanks of various diameters.

[0039] like Figure 2 , 7As shown in Figures 8 and 9, one end of the retractable frame 10 is provided with a baffle fixing claw 9 for fixing to the scum baffle, and the other end is provided with a pool body fixing seat 5 for fixing to the pool wall. The sunshade net 1 is fixed to the pool wall using the pool body fixing seat 5 and the pool wall fixing bolts 7. The baffle fixing claw 9 consists of a baffle platform 9.1, a slide rail 9.2, a telescopic claw 9.3, and a telescopic spring 9.4. A slide rail 9.2 is provided inside the scum baffle fixing end of the retractable frame 10, and a baffle platform 9.1 is provided at its end. The telescopic claw 9.3 is embedded in the slide rail 9.2, and both ends of the telescopic spring 9.4 are fixed to the retractable frame 10 and the telescopic claw 9.3, respectively. When the baffle fixing claw 9 is opened and locked onto the scum baffle, under the action of the contraction force of the telescopic spring 9.4, the baffle fixing claw 9 locks the scum baffle firmly, which helps to improve the fixing strength between the sunshade net 1 and the scum baffle.

[0040] The present invention relates to an installation and operation method for a shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant: Step 1: Planning and Preparation Measure the inner and outer radii of the annular area between the scum baffle and the sedimentation tank wall in the intermediate sedimentation tank, calculate the circumference and divide it into N equal sector blocks, determine the required number and length of the telescopic frame 10, and adjust all telescopic frame 10 to the required length using the length adjustment mechanism 4. Calculate the inner and outer arc radius and length of the sector area at the inner and outer ends of the shading net, and prepare the required number, length, and arc of the inner sector frame 11 and outer sector frame 12 accordingly. Use the frame connector 13 and the U-shaped fixing buckles 2 at both ends of the telescopic frame 10 to connect and fix the telescopic frame 10 on both sides, the inner sector frame 11, and the outer sector frame 12 into a whole sector fixing frame 3.

[0041] Step 2: Secure the shade netting Embed the cut shade net 8 around its edges into the corresponding fixing clips 14 and the two rubber plates 2.2 in the U-shaped fixing buckle 2 on the fixing frame 3. Tighten the fastening bolts 2.3 on the U-shaped fixing buckle 2 with a tool, press the fixing clips 14 to firmly clamp and flatten the shade net 8, and complete the pre-installation of the shade net panel 1.

[0042] Step 3: Install and secure the shade netting. The pre-installed shade netting 1 is laid out on the annular pool between the scum baffle and the sedimentation tank wall. The shade netting 1 is then secured to the scum baffle using the baffle fixing claws 9, and finally fixed to the pool wall using the pool body fixing seat 5 and the pool wall fixing bolts 7. In this way, the entire set of shade netting 1 is laid out sequentially on the annular pool. The two shade netting 1 are sealed together by magnetic attraction between magnets and metal, thus completing the closed coverage of the entire annular pool area.

[0043] Effect verification The intermediate sedimentation tank of Xinjiang Kunlun New Water Source Hongqiao Water Treatment Co., Ltd. was technically improved using a shading and algae prevention device for the intermediate sedimentation tank of a sewage treatment plant according to the present invention, and was put into production operation for 6 months. Compared with the previous operation of the intermediate sedimentation tank without shading and algae prevention facilities, the intermediate sedimentation tank operation mode improved by this device has achieved outstanding results in terms of suspended solids (SS) in the effluent from the secondary sedimentation tank and manual cleaning, significantly reducing labor costs, ensuring that the effluent meets the discharge standards, improving production efficiency, and creating favorable conditions for building an unmanned plant area.

[0044] After applying this system, the annular water surface of the intermediate sedimentation tank is completely covered, effectively eliminating the environment for algae growth. The system is easy to install, with reliable interface sealing, achieving sustainable algae control. Manual harvesting is reduced to zero, and operating and maintenance costs are significantly lowered, resulting in long-term and economical algae control.

[0045] The above technical features constitute the preferred embodiment of the present invention, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant, characterized in that: The algae prevention device consists of several shade net panels (1) covering the annular pool formed by the scum baffle and the sedimentation tank wall. The shade net panel (1) consists of U-shaped fixing buckles (2), fixing frames (3), length adjustment mechanisms (4), pool body fixing seats (5), shade nets (8), baffle fixing claws (9), frame connectors (13), and fixing net clips (14). The U-shaped fixing buckle (2) includes a U-shaped fixing plate (2.1), a rubber plate (2.2), a fastening bolt (2.3), and a fixing threaded hole (2.4). A fixing threaded hole (2.4) that engages with the fastening bolt (2.3) is opened in the middle of the fixing plates on both sides of the U-shaped fixing plate (2.1). A rubber plate (2.2) is set at the top and bottom of the U-shaped groove of the U-shaped fixing plate (2.1). The U-shaped fixing buckle (2) is fixed to the inner side of the telescopic frame (10) as a whole. The fixed frame (3) consists of two retractable frame sides (10), a fan-shaped inner frame (11) and a fan-shaped outer frame (12). The frame sides are connected and fixed together by the frame connector (13) and the U-shaped fixing buckles (2) at both ends of the retractable frame (10). The retractable frame (10) consists of upper and lower frame sections, with a length adjustment mechanism (4) in the middle. The length adjustment mechanism (4) includes an adjustment screw (4.1), an adjustment threaded hole (4.2), and a multi-faceted adjustment handle (4.3). An adjustment threaded hole (4.2) that engages with the adjustment screw (4.1) is provided at the center of the corresponding ends of the upper and lower frame sections. A multi-faceted adjustment handle (4.3) is provided in the middle section of the adjustment screw (4.1). A magnetic strip (6) is longitudinally provided on the outer side of the retractable frame (10) on one side of the fixed frame (3). The shade net (8) is fixed together by the U-shaped fixing buckle (2) on the retractable frame (10) and the fixing net clip (14) set on the inner frame (11) and outer frame (12) of the fan shape; One end of the retractable frame (10) is provided with a baffle fixing claw (9) for fixing to the scum baffle, and the other end is provided with a pool body fixing seat (5) for fixing to the pool wall; the baffle fixing claw (9) is composed of a baffle (9.1), a slide (9.2), a telescopic claw (9.3) and a telescopic spring (9.4). A slide (9.2) is provided in the scum baffle fixing end of the retractable frame (10), a baffle (9.1) is provided at its end, the telescopic claw (9.3) is embedded in the slide (9.2), and the two ends of the telescopic spring (9.4) are fixed to the retractable frame (10) and the fixed telescopic claw (9.3) respectively.

2. The shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant according to claim 1, characterized in that: Several U-shaped fixing buckles (2) and fixing mesh clips (14) are evenly arranged on the retractable frame (10), the fan-shaped inner frame (11) and the fan-shaped outer frame (12) on both sides and fixed together.

3. The shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant according to claim 1, characterized in that: The edge of the shade net (8) is inserted between the upper and lower rubber plates (2.2) in the U-shaped groove of the U-shaped fixing plate (2.1). The shade net (8) is clamped and fixed by using fastening bolts (2.3) and fixing threaded through holes (2.4) to press the upper rubber plate (2.2). The upper and lower fan-shaped edges of the shade net (8) are clamped and stretched on the fixing frame (3) by fixing net clamps (14).

4. The shading and algae prevention device for an intermediate sedimentation tank in a wastewater treatment plant according to claim 1, characterized in that: The sunshade net (1) is fixed to the pool wall using the pool body fixing seat (5) and the pool wall fixing bolts (7).

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