Vertical flow type foldable insert folding plate flocculation tank and its installation method and application

Abstract

The application provides a vertical flow type foldable insert folding plate flocculation tank and a mounting method and application thereof. The flocculation tank comprises: guide rails, which are vertically fixedly mounted on side walls and partition walls of the flocculation tank and arranged in pairs; a plurality of folding plate assemblies, which are slidably mounted between the paired guide rails in the front and middle sections of the flocculation tank, and the included angles between adjacent folding plate units in the folding plate assemblies are adjustable; and a plurality of straight plate units, which are slidably mounted between the paired guide rails in the rear section of the flocculation tank. One application is to adjust the flocculation effect of the flocculation tank by adjusting the included angles between adjacent folding plate units in the folding plate assemblies, and the other application is to expand the flocculation tank by moving the water distribution flower partition wall backward and to expand the water purification scale by rearranging the folding plate assemblies. The foldable insert mounting is adopted, so that the folding plate assemblies are quickly mounted and dismounted, the maintenance is facilitated, the flocculation tank is conveniently reconstructed and expanded, the included angles between the folding plate units are adjustable, different water inflow and water quality can be adapted, and the engineering investment and construction period are saved.

Description

Technical Field

[0001] This invention relates to the field of folded plate flocculation tank technology, specifically to a vertical flow type foldable insertable folded plate flocculation tank and its installation method and application. Background Technology

[0002] Currently, flocculation is one of the most crucial process units in water purification plants. Common flocculation processes include baffle flocculation, baffle flocculation, grid (mesh) flocculation, and mechanical flocculation. Among these, baffle flocculation has gained widespread market recognition and has been increasingly widely used in recent years due to its advantages such as good flocculation effect, high reaction efficiency, and no need for mechanical equipment. Baffle flocculation can be further divided into "horizontal flow" baffles and "vertical flow" baffles. "Horizontal flow" baffles often use concrete or brick-concrete structures, which are cumbersome and slow to construct; "vertical flow" baffles often use stainless steel structures, which are hoisted as a whole and then welded, resulting in faster construction and increasingly widespread application. However, in practical applications, "vertical flow" baffles still have the following problems: (1) To ensure the quality of the folded plate, the factory as a whole processing method is adopted. However, since the folded plate is an irregular structure with a large volume, it is inconvenient to transport as a whole and the transfer cost is high. If the steel plate is welded on site, there will be problems such as long construction period and difficulty in ensuring quality. (2) During installation, the stainless steel folding plate is hoisted into the flocculation tank as a whole and then welded and fixed. The construction is still relatively troublesome, the cycle is still long, and the cost is high. (3) The welding construction quality is unstable and the welding effect is not guaranteed. There are a series of problems such as deformation of the welded plate, weak welding and low precision, which seriously affect the appearance and durability. (4) The folded plate flocculation tank is divided into three sections, from front to back: the relative folded plate section (i.e., the front section), the parallel folded plate section (i.e., the middle section), and the straight plate section (i.e., the rear section). The spacing between the folded plates is often small. Especially for folded plate sections of small scale, if they are damaged during use, they cannot be repaired at all. They need to be dismantled and treated on a large scale, which is a lot of work and difficult to maintain and repair. (5) Due to the use of welding process, the folding plates are usually not adjustable or reusable, and their adaptability and reusability are limited. When the raw water quality changes and the turbulence of the water flow needs to be adjusted, the existing fixed welded folding plates obviously cannot meet the new requirements. When the scale of water purification changes and the spacing of the folding plates needs to be adjusted, the existing fixed welded folding plates obviously cannot meet the requirements. If the modification is forced, the existing folding plates can only be dismantled and rebuilt, which is costly, time-consuming and complicated.

[0003] Solving the above problems and proposing a folded plate flocculation tank with advantages such as overall factory processing, intensive transportation, convenient on-site installation, and guaranteed quality, and with an adjustable folded plate structure, has important practical significance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a vertical flow foldable insertable baffle flocculation tank, its installation method, and its application.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a vertical flow foldable insertable baffle flocculation tank, comprising: The guide rails are vertically fixedly installed on the side wall and partition wall of the flocculation tank, and are arranged in pairs; Several folding plate assemblies are slidably installed between pairs of guide rails in the front and middle sections of the flocculation tank, and the included angle between adjacent folding plate units inside the folding plate assembly is adjustable to achieve foldable insertion; Several straight plate units are slidably installed between pairs of guide rails in the rear section of the flocculation tank.

[0006] Based on the above technical solution, both the straight plate unit and the folding plate assembly can be detachably inserted into the flocculation tank via guide rails. Furthermore, the included angle between adjacent folding plate units inside the folding plate assembly is adjustable (i.e., foldable), allowing several folding plate assemblies to adapt to different influent flow rates and raw water qualities for flocculation. Based on the detachable and foldable insertion installation method, the straight plate unit and folding plate assembly in the flocculation sedimentation tank can be quickly replaced, adapting to changes in water purification scale, and with low construction costs.

[0007] Furthermore, the folding plate assembly includes several folding plate units, which are connected by hinges; one row of hinge shafts is the first hinge shaft, with sliders formed at both ends of the first hinge shaft, and the other row of hinge shafts is the second hinge shaft, with limit caps formed at both ends of the second hinge shaft.

[0008] Furthermore, a groove is formed inside the guide rail along its length, and the slider is inserted into the groove and can slide along the groove; a support rod is slidably installed in the groove, the support rod is supported between two adjacent sliders, and the length of the support rod is adjustable; by adjusting the length of the support rod inside the guide rail, the included angle between adjacent folding plate units can be adjusted.

[0009] Furthermore, the support rod includes a sleeve rod and an extension rod, which are connected by threads or pins to adjust the length of the support rod.

[0010] Furthermore, each folding plate unit has several sleeves formed at both its upper and lower ends along the transverse direction, and the sleeves between adjacent folding plate units are connected by a first hinge or a second hinge.

[0011] Furthermore, the folding plate assembly also includes an upper end plate, the lower end of which is connected to the adjacent folding plate unit via a first hinge pin, and first sliding plates are formed on both sides of the upper end plate, which are engaged in a sliding groove and can slide along the groove; or, the folding plate assembly also includes a lower end plate, the upper end of which is connected to the adjacent folding plate unit via a first hinge pin, and first sliding plates are formed on both sides of the upper end plate, which are engaged in a sliding groove and can slide along the groove.

[0012] Furthermore, a second sliding plate is formed on both sides of the straight plate unit. The second sliding plate is inserted into the slide groove and can slide along the slide groove.

[0013] Secondly, the present invention provides an installation method for a vertical flow foldable insertable baffle flocculation tank, comprising the following steps: According to the design spacing, guide rails are installed in pairs on the side wall and partition wall of the flocculation tank; Adjust the included angle between adjacent folding plate units inside the folding plate assembly to achieve the designed angle; Insert the folding plate assembly, adjusted to the design angle, into the paired guide rails in the front and middle sections of the flocculation tank; Insert the straight plate unit into the paired guide rails in the rear section of the flocculation tank.

[0014] Thirdly, the present invention provides an application of a vertical flow foldable insertable baffle flocculation tank, wherein the application involves adjusting the flocculation effect of the flocculation tank according to the following method: Several baffle assemblies are removed from the paired guide rails in the front and middle sections of the flocculation tank. After adjusting the included angle between adjacent baffle units inside the baffle assembly, they are reinstalled to change the spacing between the baffle assemblies and the water flow velocity, thereby achieving different G values ​​(velocity gradient) and GT values ​​(velocity gradient × hydraulic residence time) to adjust the flocculation effect.

[0015] Fourthly, the present invention provides an application of a vertical flow foldable insertable baffle flocculation tank, wherein the application is to expand the scale of water purification according to the following method: The guide rails, several folding plate assemblies, and several straight plate units were removed. The water distribution partition wall of the current flocculation tank was moved into the original sedimentation tank. Guide rails were installed in pairs on the side walls and partition walls of the original flocculation tank and the side walls and expansion partition walls of the original sedimentation tank-to-flocculation tank according to the design spacing. Several folding plate assemblies and several straight plate units were reinstalled to form a new flocculation tank with a larger flocculation scale. The retained part of the original sedimentation tank was optimized.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: (1) The folding plate assembly can be manufactured in a standardized manner, with stable and reliable quality; the folding plate assembly can be folded and transported in an intensive manner, greatly reducing the difficulty and cost of transportation; the folding plate assembly can be inserted and installed on site without welding, making installation convenient and quick, and ensuring installation quality; the folding plate assembly can be quickly removed from the guide rail, making it convenient for inspection and maintenance, and also easy to recycle and reuse. (2) By changing the angle between adjacent folding plate units, the flow velocity of the peak or trough of the relative folding plate can be adjusted to a certain extent, thereby changing the turbulence characteristics and G value of the water flow, thus improving the flocculation effect and enhancing the ability and resilience of the flocculation tank to adapt to different influent flow rates and water quality. (3) By converting part of the original sedimentation tank into a flocculation tank, and by extending the length of the baffle and adjusting the installation spacing of the baffle (without adding any baffle), the effective volume of the flocculation reaction can be effectively increased, the treatment scale can be improved in situ, and the project investment and construction period can be greatly reduced without expansion. Attached Figure Description

[0017] Figure 1 This is a plan view of a vertical flow foldable insertable baffle flocculation tank. Figure 2 A schematic diagram of the vertical cross-section of a vertical flow foldable insertable baffle flocculation tank; Figure 3 Here are schematic diagrams of the first and second hinge shafts; where Figure 3 (a) is a front view of the first hinge axis. Figure 3 (b) is a side view of the first hinge axis; where Figure 3 (c) is a schematic diagram of the second hinge shaft; Figure 4 This is a schematic diagram of the structure of the first hinge shaft mating with the guide rail; where Figure 4 (a) is a schematic diagram of the guide rail structure, in which Figure 4 (b) is a schematic diagram of the cooperation between the slider and the guide rail; Figure 5 This is a schematic diagram of the support rod structure; Figure 6 This is a structural schematic diagram of a folded plate unit; Figure 7 This is a schematic diagram of the upper and lower end plates of the folding plate unit; where... Figure 7 (a) is the upper plate. Figure 7 (b) is the lower end plate; Figure 8 This is a structural diagram of a straight-plate unit; Figure 9 This is a schematic diagram of a folding plate assembly; where... Figure 9 (a) without the upper and lower end plates. Figure 9 (b) with an upper end plate, Figure 9 (c) is with a lower end plate; Figure 10 This is a schematic diagram of the expansion and renovation of the flocculation tank.

[0018] In the diagram: 1-Folding plate unit; 2-Hoop sleeve; 3-First hinge shaft; 4-Slider; 5-Second hinge shaft; 6-Limiting end cap; 7-Guide rail; 8-Expansion bolt; 9-Slide groove; 10-Sleeve rod; 11-Screw rod; 12-Upper end plate; 13-Lower end plate; 14-First sliding plate; 15-Straight plate unit; 16-Second sliding plate; 21-Flocculant tank side wall; 22-Flocculant tank partition wall; 23-Water distribution splash partition wall; 24-Extension partition wall; 25-Reconstructed water distribution splash partition wall. Detailed Implementation

[0019] Existing methods typically employ overall hoisting and welding, but these methods suffer from a series of problems, including high construction difficulty, complex processes, unstable quality, difficulty in inspection and maintenance, and inability to adjust or reuse.

[0020] Chinese utility model patent CN213012125U designs a device for adjusting the spacing of baffles as a whole. While reducing the spacing of some baffles to accommodate low flow rates, it also causes the spacing of other baffles to increase. Although the baffle G-value (velocity gradient) is improved in some sections, it leads to a worse G-value in other sections, resulting in an inability to effectively improve the overall flocculation effect of the flocculation tank. In addition, the design is complex and fails to achieve the goals of foldable and compact transportation, convenient installation, easy expansion and renovation, or recycling and reuse.

[0021] Chinese utility model patent CN216497655U designs a device for adjusting the tilt angle of the overall baffles. After adjustment, the overall volume utilization rate is lower, the peak and valley flow velocities are no longer distinct, the flocculation conditions are uncontrollable, and the overall effect is worse. Furthermore, the design has a complex structure and a chaotic arrangement of relative and parallel baffles, making it impossible to accurately measure and evaluate the flocculation effect using parameters. Well-flocculated flocs at the front end may be broken up at the rear end, resulting in poor flocculation. It also fails to achieve the goals of foldable, intensive transportation, convenient installation, and ease of expansion, renovation, or recycling.

[0022] To this end, the present invention innovatively proposes a folding insert-type folding plate assembly and its flocculation tank, and designs a complete set of components that can well achieve the aforementioned goals of overall factory processing, intensive transportation, convenient on-site installation, guaranteed quality, and adjustable and reusable folding plates. Moreover, it is very suitable for adjusting the flocculation effect and flocculation scale of the flocculation tank, completely breaking the traditional folding plate installation method, and has extremely high engineering application prospects and great economic value.

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings.

[0024] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Example 1; Please see Figure 1-9 This embodiment provides a vertical flow foldable insertable baffle flocculation tank, comprising: The guide rails 7 are vertically fixed on the side wall 21 and the partition wall 22 of the flocculation tank, and are arranged in pairs; Several folding plate assemblies are slidably installed between pairs of guide rails 7 in the front and middle sections of the flocculation tank, and the included angle between adjacent folding plate units 1 inside the folding plate assembly is adjustable to achieve foldable insertion; Several straight plate units 15 are slidably installed between pairs of guide rails 7 in the rear section of the flocculation tank.

[0026] Based on the above technical solution, both the straight plate unit 15 and the folding plate assembly can be detachably inserted into the flocculation tank via the guide rail 7. Furthermore, the included angle between adjacent folding plate units 1 inside the folding plate assembly is adjustable (i.e., foldable), allowing several folding plate assemblies to adapt to the flocculation of different raw water qualities. Based on the detachable insertion and foldable installation method, the straight plate unit 15 and the folding plate assembly in the flocculation sedimentation tank can be quickly replaced, adapting to changes in the scale of water purification, and with low construction costs.

[0027] Specifically, the folding plate assembly includes several folding plate units 1, which are connected by hinges. One row of hinge shafts is the first hinge shaft 3, with sliders 4 formed at both ends of the first hinge shaft 3. The other row of hinge shafts is the second hinge shaft 5, with limit caps 6 formed at both ends of the second hinge shaft 5. Each folding plate unit 1 has several sleeves 2 formed laterally at both its upper and lower ends. The sleeves 2 between adjacent folding plate units 1 are connected by the first hinge shaft 3 or the second hinge shaft 5. The hinge shaft that slides in cooperation with the slide groove 9 is the first hinge shaft 3. Laterally refers to the width direction along the flocculation tank. The limit caps 6 prevent the second hinge shaft 5 from dislodging from the sleeves 2, ensuring stable connection and effective rotation of adjacent folding plate units 1.

[0028] Specifically, a groove 9 is formed inside the guide rail 7 along its length (i.e., vertically). The slider 4 is inserted into the groove 9 and can slide along it. A support rod is slidably installed in the groove 9, and the support rod can also slide along it. The support rod is supported between two adjacent sliders 4, and its length is adjustable. Adjusting the length of the support rod inside the guide rail 7 adjusts the included angle between adjacent folding plate units 1. To ensure that the support rod is always kept in the groove 9, the groove 9 is an irregularly shaped groove, i.e., the internal dimension is larger than the external dimension, such as an equilateral trapezoid or a "convex" shape. The specific shape can be determined according to actual needs.

[0029] Specifically, the support rod includes a sleeve rod 10 and an extension rod. The sleeve rod 10 and the extension rod are connected by a threaded connection or a pin connection to adjust the length of the support rod. When a threaded connection is used, the extension rod is a screw 11. One end of the sleeve rod 10 has an internal long threaded hole that mates with the screw 11. The end of the screw 11 may have an enlarged head to facilitate support of the slider 4. When a pin connection is used, the extension rod has a pin hole. Several pin holes are arranged on the sleeve rod 10 at intervals corresponding to different design angles between adjacent folding plate units 1. The sleeve rod 10 and the extension rod are connected by pins, screws, or other connectors. In addition, the length of the support rod can also be adjusted using other known methods.

[0030] Specifically, the folding plate assembly also includes an upper end plate 12, the lower end of which is connected to the adjacent folding plate unit 1 via a first hinge pin 3. First sliding plates 14 are formed on both sides of the upper end plate 12. The first sliding plates 14 are inserted into the sliding groove 9 and can slide along the sliding groove 9. Alternatively, the folding plate assembly also includes a lower end plate 13, the upper end of which is connected to the adjacent folding plate unit 1 via a first hinge pin 3. First sliding plates 14 are formed on both sides of the upper end plate 12. The first sliding plates 14 are inserted into the sliding groove 9 and can slide along the sliding groove 9.

[0031] It should be noted that different flocculation tanks will have different water depths, and the water depth of the flocculation tank often cannot perfectly match the vertical height of the standard baffle plate. Therefore, there must be a height adaptation process at the upper or lower end of the baffle plate assembly. Setting upper and lower end plates at the upper or lower end of the standard baffle plate assembly can accommodate different water depths and different upper and lower orifice / weir heights. In some cases, although end plates are not required at the upper or lower end of the baffle plate assembly, their ends are not constrained by guide rail 7. In this case, the uppermost or lowermost baffle plate unit can be fixedly connected to its adjacent baffle plate unit by welding or other methods. During maintenance, the number of baffle plate units replaced according to the design angle is small, resulting in lower costs.

[0032] Specifically, the straight plate unit 15 has second sliding plates 16 formed on both sides, which are inserted into the slide groove 9 and can slide along the slide groove 9. Both the folding plate unit 1 and the straight plate unit 15 are symmetrical structures.

[0033] The complete set of components includes guide rail 7, folding plate unit 1, upper and lower end plates, straight plate unit 15, first hinge shaft 3, second hinge shaft 5, telescopic support rod, etc., which can meet the needs of different vertical flow folding plate flocculation tanks. Guide rail 7 adopts a groove structure (slide groove 9), which can be vertically fixed to the wall (flocculation tank side wall 21 and flocculation tank partition wall 22) using expansion bolts, or it can be nested into the wall as a whole during wall construction; guide rail 7 can be made of carbon steel or stainless steel as needed; the slide groove 9 of guide rail 7 is used for the insertion installation of the folding plate assembly, and also serves as a limit to prevent the first hinge shaft 3 from shifting left or right; a support rod is designed between every two first hinge shafts 3 to limit the distance between the two first hinge shafts 3, thereby fixing adjacent folding plate units 1. The included angle between the plates is not specified, but the length of the support rod is designed to be freely adjustable. Different lengths correspond to different included angles of the folding plates. By adjusting the length of the support rod, the included angle of the folding plate assembly can be flexibly adjusted to achieve folding of the folding plate assembly. After each adjustment, the length of the support rod remains fixed, so that the folding plate assembly maintains the designed angle during operation, avoiding affecting the flocculation effect. In addition to the lower end plate 13 (which needs to contact the bottom of the flocculation tank), some inclined plate assemblies may lack support at the bottom. In this case, a baffle can be installed at the bottom of the guide rail 7 for load-bearing support of the bottommost folding plate unit 1. The folding plate unit is a planar structure with multiple segments of cylindrical coiled structures at the top and bottom ends, which serve as multiple sleeves 2 to facilitate the interlocking of two adjacent folding plate assemblies. Then, the first hinge shaft 3 or the second hinge shaft 5 is inserted into the sleeve 2 to form a foldable whole. The hinge shaft is divided into two types: the first hinge shaft 3 and the second hinge shaft 5. The main body of the first hinge shaft 3 is a small cylindrical tube, and the ends are flattened to form sliders 4, which are the parts that are inserted into the sliding grooves 9 inside the guide rail 7. The second hinge shaft 5 is similar to the first hinge shaft 3, except that its end is a round tubular limiting cap, corresponding to the size of the second hinge shaft 5. The upper end plate 12 and the lower end plate 13 are similar to the folding plate unit 1, but only one end has a multi-segment round tubular curled structure as multiple sleeves 2 for interlocking with adjacent folding plate units 1. Both sides have thickened strips as first sliding plates 14 for tightly fitting with the inner grooves 9 of the guide rail 7, improving rigidity and enhancing the stability of the system. The straight plate unit 15 has thickened strips on both sides as second sliding plates 16, which match the grooves 9 in the paired guide rails 7 of the straight plate section (rear section) of the folding plate flocculation tank.

[0034] The fundamental problem with traditional baffle flocculation tanks is the lack of an adjustable mechanism, resulting in poor adaptability to influent flow rates. Furthermore, the flocculation process has specific requirements for G-values ​​and GT-values. Therefore, making the flocculation process adjustable is key to solving this problem, i.e., improving the applicability of the baffle flocculation tank to different flow rates. The method employed in this invention, by adjusting the baffle angle, effectively addresses the issue of low flow rates.

[0035] In addition, the present invention also has the function of fine-tuning water quality; the G value and GT value usually have a certain range, while the existing design is usually a fixed value, and it is impossible to determine whether the flocculation effect is optimal. By fine-tuning the angle to achieve fine-tuning of the G value and GT value, a better adaptation effect can be achieved.

[0036] In summary, this invention can find the optimal G value by finely adjusting the angle between the baffle units, and adapt to different inlet water volumes by large adjustments to the angle. The specific adjustment angle can be determined based on design calculations.

[0037] Example 2; Please see Figure 1-9 This embodiment provides an installation method for a vertical flow foldable insertable baffle flocculation tank, including the following steps: According to the design spacing, guide rails 7 are installed in pairs on the side wall 21 and partition wall 22 of the flocculation tank; Adjust the included angle between adjacent folding plate units 1 inside the folding plate assembly to achieve the designed angle; Insert the folding plate assembly, adjusted to the design angle, into the paired guide rails 7 in the front and middle sections of the flocculation tank; Insert the straight plate unit 15 into the paired guide rails 7 in the rear section of the flocculation tank.

[0038] Specifically, for newly built flocculation tanks, the guide rails 7 can be directly embedded into the side wall 21 and partition wall 22 of the flocculation tank according to the design spacing; for renovated flocculation tanks, the guide rails 7 can be fixedly installed on the side wall 21 and partition wall 22 of the flocculation tank using expansion bolts 8.

[0039] Specifically, before installation, the folding plate unit 1 is assembled into a folding plate assembly according to the design requirements through the first hinge shaft 3 and the second hinge shaft 5. The two ends of the second hinge shaft 5 are sealed and limited by the limiting end caps 6. The folding spacing of the folding plate unit 1 is determined according to the width of the folding plate unit 1 and the design included angle between adjacent folding plate units 1, and the extension length of the screw 11 relative to the sleeve rod 10 is adjusted accordingly.

[0040] Specifically, during installation, for the folding plate assembly with the lower end plate 13, the lower end plate 13 is first inserted into the flocculation tank, and the first sliding plates 14 on both sides of the lower end plate 13 are correspondingly inserted into the sliding grooves 9. At the same time, the sliders 4 at both ends of the first hinge shaft 3 at the upper end of the lower end plate 13 are also correspondingly inserted into the sliding grooves 9. Then, a support rod is placed above the sliders 4. Then, the first folding plate unit 1 and the second folding plate unit 1 are folded, and the next support rod is placed above the sliders 4 at both ends of the first hinge shaft 3 at the upper end of the second folding plate unit 1. This process is repeated until the current folding plate assembly is installed. The installation method for folding plate assemblies without the lower end plate 13 and folding plate assemblies with the upper end plate 12 is similar.

[0041] Specifically, when the straight plate unit 15 is inserted into the flocculation tank, the second slide plates 16 on both sides of it are inserted into the slide groove 9.

[0042] Example 3; Please see Figure 1-9 This embodiment provides an application of a vertical flow foldable insertable baffle flocculation tank. The application involves adjusting the flocculation effect of the flocculation tank according to the following method: removing several baffle components from the paired guide rails in the front and middle sections of the flocculation tank, adjusting the included angle between adjacent baffle units inside the baffle components, and then reinstalling them to change the spacing between the baffle components and the water flow velocity, thereby achieving the purpose of adapting to different water inflow scales and adjusting the flocculation effect.

[0043] There are two scenarios in this embodiment: One approach is to address situations where the actual operating scale is significantly smaller than the design scale, resulting in substantial deviations in peak / valley flow velocities, G-values, and GT-values ​​from the design values, leading to poor flocculation. In this case, the peak / valley flow velocities can be significantly altered by drastically reducing the angle of the baffle unit, thereby ensuring flocculation and enhancing the system's adaptability. Although the effective flocculation height and effective volume will decrease, the G-values ​​and GT-values ​​will meet the requirements for small-scale operations, thus ensuring flocculation. Another approach addresses the optimization of flocculation effects at the design scale. This involves fine-tuning the angle to ensure that the G-value and GT-value remain within a scientifically sound range (e.g., the G-value is typically between 30 and 60 seconds). -1 Further optimization of the G and GT values ​​(between 104 and 105) is needed to achieve better flocculation results.

[0044] Taking a 25,000-ton / day folding plate flocculation tank as an example, the original design was a "vertical flow" folding plate structure, using stainless steel, hoisted as a whole, and then welded. The angle of the folding plates was not adjustable, and it was designed in three sections: 1) The relative folding section adopts a 120° folding plate with a peak spacing of 0.30m. At the design scale (considering a variation coefficient of 1.05), the peak velocity is 0.25m / s, the valley spacing is 0.70m, the valley velocity is 0.109m / s, the head loss is 0.204m, the flocculation time T1 is 4.06min, and the G value is 90.15s. -1 The GT value is 2.19 × 10 4 ; 2) With a parallel folded plate section spacing of 0.520m, a flow velocity of 0.15m / s, a head loss of 0.165m, a flocculation time T2 of 5.18min, and a G value of 71.82s, the flocculation time is 5.18min. -1 The GT value is 2.23 × 10⁻⁶. 4 ; 3) The parallel straight plate section has a plate spacing of 0.750m, a flow velocity of 0.10m / s, a head loss of 0.025m, a flocculation time T3 of 7.30min, and a G value of 23.60s. -1 The GT value is 1.03 × 10⁻⁶. 4 ; 4) The total flocculation time was 16.54 min, and the G value was 62.08 s. -1 The GT value is 6.16 × 10 4 .

[0045] If the actual operating scale is only 70% of the designed scale, then: 1) The peak velocity of the relative folding section is 0.18 m / s, the valley velocity is 0.076 m / s, the head loss is 0.100 m, the flocculation time T1 is 5.92 min, and the G value is 52.52 s. -1 The GT value is 1.85 × 10⁻⁶. 4 ; 2) The flow velocity in the parallel folded section is 0.10 m / s, the head loss is 0.065 m, the flocculation time T2 is 7.89 min, and the G value is 36.43 s. -1 The GT value is 1.72 × 10⁻⁶. 4 ; 3) In the parallel straight section, the flow velocity is 0.07 m / s, the head loss is 0.012 m, the flocculation time T3 is 11.42 min, and the G value is 13.21 s. -1 The GT value is 0.91 × 10⁻⁶. 4 ; 4) The total flocculation time was 25.23 min, and the G value was 33.68 s. -1 The GT value is 5.10 × 10 4 .

[0046] Obviously, when the angle of the folding unit cannot be adjusted, the G value and GT value deviate significantly from the design scale (-46% and -17%, respectively).

[0047] If the solution of this invention is adopted, then: 1) Adjust the baffle angle to 90°, the peak spacing of the baffles is 0.217m, the peak velocity is 0.25m / s at 70% of the design scale, the valley spacing of the baffles is 0.783m, the valley velocity is 0.068m / s, the head loss is 0.178m, the flocculation time T1 is 5.82min, and the G value is 70.42s. -1 The GT value is 2.46 × 10 4 ; 2) The parallel folded plate section spacing is 0.424m, the flow velocity is 0.13m / s, the head loss is 0.065m, the flocculation time T2 is 7.64min, and the G value is 37.21s. -1The GT value is 1.71 × 10⁻⁶. 4 ; 3) The parallel straight plate section has a plate spacing of 0.750m, a flow velocity of 0.07m / s, a head loss of 0.012m, a flocculation time T3 of 11.05min, and a G value of 13.43s. -1 The GT value is 0.89 × 10 4 ; 4) The total flocculation time was 24.51 min, and the G value was 41.12 s. -1 The GT value is 6.05 × 10 4 .

[0048] Compared to the design scale, both the G-value and GT-value show small deviations (-34% and -1.8% respectively), indicating that the folding insert-type folding plate has better adaptability to water flow and water quality compared to the fixed folding plate.

[0049] Example 4; Please see Figure 1-10 This embodiment provides an application of a vertical flow foldable insertable baffle flocculation tank. This application expands the water purification scale according to the following method: the guide rails 7, several baffle components and several straight plate units 15 are removed; the water distribution partition wall 23 of the current flocculation tank is moved into the original sedimentation tank; the guide rails 7 are installed in pairs on the side walls and partition walls of the original flocculation tank and on the side walls and expansion partition walls 24 of the original sedimentation tank-to-flocculation tank according to the design spacing; several baffle components and several straight plate units 15 are reinstalled to form a new flocculation tank with a larger flocculation scale; the retained part of the original sedimentation tank is optimized, for example, it can be changed into a general side flow inclined plate sedimentation tank, a side flow herringbone-shaped inclined plate sedimentation tank, or a horizontal pipe sedimentation tank.

[0050] If Figure 1 For the original flocculation tank, please refer to Figure 10 , Figure 10 For based on Figure 1 The original flocculation tank shown is being expanded into a new flocculation tank. The original sidewall 21 and partition wall 22 of the flocculation tank remain unchanged. Part of the original sedimentation tank is converted into the new flocculation tank, and a partition wall 24 is added within the new flocculation tank. Simultaneously, the original water-splashing partition wall 23 is moved backward to form a modified water-splashing partition wall 25. Then, the spacing between the folding plate assembly and the straight plate unit is increased. Only the folding insert type folding plate provided by this invention can achieve rapid expansion and reconstruction of the flocculation tank.

[0051] Taking a 25,000-ton / day folding plate flocculation tank as an example, the original design was a "vertical flow" folding plate structure, using stainless steel, hoisted as a whole, and then welded. The angle of the folding plates was not adjustable, and it was designed in three sections: 1) The relative folding section adopts a 120° folding plate with a peak spacing of 0.30m. At the design scale (considering a variation coefficient of 1.05), the peak velocity is 0.25m / s, the valley spacing is 0.70m, the valley velocity is 0.109m / s, the head loss is 0.204m, the flocculation time T1 is 4.06min, and the G value is 90.15s. -1 The GT value is 2.19 × 10 4 ; 2) With a parallel folded plate section spacing of 0.520m, a flow velocity of 0.15m / s, a head loss of 0.165m, a flocculation time T2 of 5.18min, and a G value of 71.82s, the flocculation time is 5.18min. -1 The GT value is 2.23 × 10⁻⁶. 4 ; 3) The parallel straight plate section has a plate spacing of 0.750m, a flow velocity of 0.10m / s, a head loss of 0.025m, a flocculation time T3 of 7.30min, and a G value of 23.60s. -1 The GT value is 1.03 × 10⁻⁶. 4 ; 4) The total flocculation time was 16.54 min, and the G value was 62.08 s. -1 The GT value is 6.16 × 10 4 .

[0052] The project plans to expand the capacity by 25,000 tons / day, bringing the total capacity of the water plant to 50,000 tons / day. The original expansion plan involved replicating the existing 25,000 tons / day folded plate flocculation sedimentation tank, with an investment of approximately 8.15 million yuan. However, if a folded insert type folded plate and herringbone-shaped lateral flow inclined plate sedimentation tank (CN121668748B) is adopted, and the existing tank is upgraded using the aforementioned method, maintaining the same parameters such as flocculation time, G-value, and GT-value, the flocculation and sedimentation effect will fully reach the previous level. This would allow the existing 25,000 tons / day folded plate flocculation sedimentation tank to be directly converted into a 50,000 tons / day folded plate flocculation herringbone-shaped lateral flow inclined plate sedimentation tank, with a total investment of approximately 3.5 million yuan. This would significantly reduce project investment (saving approximately 57%) and would require no new land acquisition.

[0053] There are numerous flocculation sedimentation tanks across the country, with nearly 200 county-level and above water plants in Hunan Province alone. The vast majority of these plants utilize traditional baffled flocculation sedimentation processes, and each plant has at least two production lines. In recent years, urban water supply demand has increased, and some rural areas also face water supply needs. Replacing traditional baffled flocculation sedimentation tanks with the solution of this invention would yield significant economic benefits. Combined with advantages such as land saving and shortened construction time, this invention is even more practically significant.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A vertical flow foldable insertable baffle flocculation tank, characterized in that: include: The guide rails are vertically fixedly installed on the side wall and partition wall of the flocculation tank, and are arranged in pairs; Several folding plate assemblies are slidably installed between pairs of guide rails in the front and middle sections of the flocculation tank, and the included angle between adjacent folding plate units inside the folding plate assembly is adjustable to achieve foldable insertion; Several straight plate units are slidably installed between pairs of guide rails in the rear section of the flocculation tank.

2. The vertical flow foldable insertable baffle flocculation tank according to claim 1, characterized in that: The folding plate assembly includes several folding plate units, which are connected by hinges; one row of hinge shafts is the first hinge shaft, and sliders are formed at both ends of the first hinge shaft; the other row of hinge shafts is the second hinge shaft, and limit caps are formed at both ends of the second hinge shaft.

3. The vertical flow foldable insertable baffle flocculation tank according to claim 2, characterized in that: The guide rail has a groove formed along its length. The slider is inserted into the groove and can slide along the groove. A support rod is slidably installed in the groove. The support rod is supported between two adjacent sliders, and the length of the support rod is adjustable. Adjusting the length of the support rod inside the guide rail adjusts the included angle between adjacent folding plate units.

4. The vertical flow foldable insertable baffle flocculation tank according to claim 3, characterized in that: The support rod includes a sleeve rod and an extension rod, which are connected by threads or pins to adjust the length of the support rod.

5. The vertical flow foldable insertable baffle flocculation tank according to claim 4, characterized in that: Each folding plate unit has several sleeves formed at both ends along the horizontal direction, and the sleeves between adjacent folding plate units are connected by a first hinge or a second hinge.

6. The vertical flow foldable insertable baffle flocculation tank according to claim 5, characterized in that: The folding plate assembly also includes an upper end plate, the lower end of which is connected to an adjacent folding plate unit via a first hinge pin. First sliding plates are formed on both sides of the upper end plate, and the first sliding plates are engaged in a sliding groove and can slide along the sliding groove. Alternatively, the folding plate assembly also includes a lower end plate, the upper end of which is connected to an adjacent folding plate unit via a first hinge pin. First sliding plates are formed on both sides of the upper end plate, and the first sliding plates are engaged in a sliding groove and can slide along the sliding groove.

7. The vertical flow foldable insertable baffle flocculation tank according to claim 3, characterized in that: The straight plate unit has a second sliding plate on both sides, which is inserted into the slide groove and can slide along the slide groove.

8. The installation method of the vertical flow foldable insertable baffle flocculation tank according to any one of claims 1-7, characterized in that: Includes the following steps: According to the design spacing, guide rails are installed in pairs on the side wall and partition wall of the flocculation tank; Adjust the included angle between adjacent folding plate units inside the folding plate assembly to achieve the designed angle; Insert the folding plate assembly, adjusted to the design angle, into the paired guide rails in the front and middle sections of the flocculation tank; Insert the straight plate unit into the paired guide rails in the rear section of the flocculation tank.

9. The application of the vertical flow foldable insertable baffle flocculation tank according to any one of claims 1-7, characterized in that: The application involves adjusting the influent volume and flocculation effect of the flocculation tank according to the following method: Several baffle assemblies are removed from the paired guide rails in the front and middle sections of the flocculation tank. After adjusting the included angle between adjacent baffle units inside the baffle assembly, they are reinstalled to change the spacing between the baffle assemblies and the water flow velocity, thereby adapting to different water intake scales and adjusting the flocculation effect.

10. The application of the vertical flow foldable insertable baffle flocculation tank according to any one of claims 1-7, characterized in that: The application is to expand the scale of water purification according to the following method: Remove the guide rails, several folding plate components and several straight plate units, move the water distribution partition wall of the current flocculation tank into the original sedimentation tank, install guide rails in pairs on the side walls and partition walls of the original flocculation tank and the side walls and partition walls of the original sedimentation tank expanded and modified flocculation tank according to the design spacing, and reinstall several folding plate components and several straight plate units to form a new flocculation tank with a larger flocculation scale. The original sedimentation tank was optimized.

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