Vertical flow modular folded plate flocculator for water purification plant

Abstract

The utility model provides a kind of vertical flow modularization folded plate flocculation tank of water purification plant, including flocculation tank body, at least two groups of modularization folded plate components and at least two groups of buttress. Flocculation tank body is vertical flow structure, and perforated sludge discharge pipe is arranged in width direction at bottom portion;Modularization folded plate component is spaced apart and installed in pool body along vertical flow direction, and it contains folded plate piece, L-shaped connecting plate and lining plate, L-shaped connecting plate two ends are connected folded plate piece and lining plate respectively, and lining plate is connected pool body wall body by bolt;Buttress corresponding component is equipped with pool bottom portion, and pressure relief hole with rubber sheet is opened, and it is enclosed with folded plate piece to form raw water closed unit. The present application improves installation efficiency and quality by modularization prefabrication, and pressure relief hole prevents water pressure impact, and modularization design is convenient for maintenance, staggered arrangement folded plate piece optimizes flocculation effect, and it is suitable for raw water treatment of water purification plant, and can prolong equipment life, reduce operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of flocculation sedimentation tanks in water purification plants, and in particular to a vertical flow modular folded plate flocculation tank for water purification plants. Background Technology

[0002] Flocculation sedimentation tanks are core facilities in water treatment plants for raw water purification. They involve adding flocculants to the raw water and using baffles to guide the water flow, allowing particulate matter in the raw water to collide fully with the flocculants and form settleable flocs, thus purifying the water. Vertical flow baffle flocculation tanks are widely used in water treatment plants due to their optimized water flow path and high flocculation efficiency.

[0003] However, existing vertical flow baffle flocculation tanks have significant defects in baffle installation and structural design: Firstly, baffle installation adopts an on-site, one-by-one operation mode, requiring unpacking and inspection of the appearance of each baffle, inventory of components, manual positioning and layout to determine the baffle position, and finally anchoring the template support to the tank wall and welding or anchoring each baffle to the support one by one. During this process, the operating space inside the tank is limited, each baffle needs to be hoisted multiple times, and the installation quality depends entirely on the skill level of the on-site workers, easily leading to problems such as uneven baffle spacing and weak welding. Firstly, the system is inefficient and has poor quality stability. Secondly, after the folding plates are installed, the gaps between the plates are extremely small, leaving no space for maintenance. If the folding plates are damaged or fall off during later operation, the surrounding structure must be completely disassembled for maintenance, resulting in high maintenance costs and difficulties. Thirdly, the bottom of the tank lacks a protective structure against water pressure impact. When the inlet water pressure increases suddenly, the folding plates are easily deformed by the water flow, shortening their service life. In addition, some folding plates and connecting parts are made of ordinary steel, which is prone to corrosion in the humid water environment of the water purification plant, further reducing the overall operational stability and durability of the flocculation tank. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vertical flow modular baffle flocculation tank for water purification plants, aiming to solve the core technical problems of existing vertical flow baffle flocculation tanks for water purification plants: the baffles rely on on-site installation one by one, which is inefficient and difficult to standardize and control the quality; there is a lack of effective water pressure impact protection structure, making the baffles susceptible to impact damage; subsequent maintenance is difficult and costly due to insufficient operating space; and the corrosion resistance of some component materials is insufficient, affecting the overall service life of the equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A vertical flow modular folded plate flocculation tank for a water purification plant includes a flocculation tank body, at least two sets of modular folded plate components, and at least two sets of supports. The connection and positional relationships of the various structures are as follows: Overall structural layout: The flocculation tank has a vertical flow structure, with perforated sludge discharge pipes at its bottom along the width direction. These pipes are used to promptly discharge sludge generated during flocculation, preventing sludge accumulation from affecting the water flow path and flocculation effect. Modular folding plate components are installed at intervals inside the flocculation tank along the vertical flow direction, replacing the traditional single-plate installation method with a modular design. Support piers are set at the bottom of the flocculation tank corresponding to the modular folding plate components, providing support for the components and optimizing the water flow path.

[0006] Structure and installation of the modular folding plate assembly: The modular folding plate assembly includes at least two folding plate pieces, at least two L-shaped connecting plates, and two liner plates. One end of the L-shaped connecting plate is fixedly connected to the folding plate piece, and the other end is fixedly connected to the liner plate, thus achieving a stable connection between the folding plate piece and the liner plate. The two liner plates are respectively anchored to the side walls of the flocculation tank with bolts, ensuring that the modular folding plate assembly is fixed as a whole within the flocculation tank, preventing displacement caused by water flow impact.

[0007] The L-shaped connecting plate is welded to the folding plate at one end and to the liner at the other end. The welding position of the L-shaped connecting plate and the folding plate can be adjusted according to the actual size of the flocculation tank, improving structural versatility. Bolt holes are provided on both sides of the liner along the water inlet direction. After the bolts pass through the bolt holes, they are anchored to the wall of the flocculation tank. A rubber gasket is sandwiched between the liner and the wall of the flocculation tank, which not only enhances the sealing performance but also prevents direct wear between the liner and the wall. In addition, adjacent folding plates in the modular folding plate assembly are arranged at intervals and staggered, causing the water flow to tumble up and down between the folding plates, prolonging the water residence time and improving the collision efficiency between particles and flocculant.

[0008] Structure and protective function of the support: The support is set corresponding to the modular folded plate assembly, and there is a folded plate piece set at an interval between the support and the modular folded plate assembly. The support and the folded plate piece together form a closed unit for raw water, avoiding short-circuiting of water flow and ensuring sufficient flocculation of raw water. The support is a continuous reinforced concrete partition structure that extends along the width of the flocculation tank. Its top surface is in contact with the bottom surface of the corresponding folded plate piece in the modular folded plate assembly, providing stable support for the folded plate piece and preventing sagging deformation.

[0009] At least two pressure relief holes are provided on the support, equidistantly distributed along the length of the support. A rubber sheet is installed on the side of each pressure relief hole closest to the water outlet direction. The rubber sheet is fixed to the support by detachable expansion bolts, and its area is larger than the diameter of the pressure relief hole. When the water pressure suddenly increases, the water flow pushes open the rubber sheet and releases pressure through the pressure relief hole, protecting the modular folding plate assembly. Under normal water pressure, the rubber sheet adheres to the pressure relief hole, ensuring that the water flows along a preset path.

[0010] Materials of perforated sludge discharge pipes and components: The perforated sludge discharge pipes have several sludge discharge holes evenly distributed along the length of the pipes to ensure uniform sludge collection. One end of the perforated sludge discharge pipe extends to the outside of the flocculation tank and connects to the sludge treatment equipment, eliminating the need for manual cleaning and reducing operation and maintenance costs. The folding plates, L-shaped connecting plates, and lining plates are all made of stainless steel, offering excellent corrosion resistance and strength. The rubber gaskets for the lining plates are made of nitrile rubber, providing aging resistance, strong sealing, and adaptability to humid aquatic environments.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. Modular folding plate components can be prefabricated in the factory. The connection quality between the L-shaped connecting plate and the folding plate and the liner is controlled by standardized welding process, avoiding the uncertainty of on-site welding operations (such as insufficient welding strength, weld corrosion, etc.). During on-site installation, the modular folding plate components only need to be hoisted into the flocculation tank as a whole by hoisting equipment, and then the liner is anchored to the wall with bolts. There is no need to install individual folding plates one by one. Moreover, the positioning accuracy and connection strength of the folding plates can be standardized and controlled through factory prefabrication, which significantly improves the quality stability.

[0012] 2. The pressure relief holes on the support and the rubber sheet form a dynamic pressure regulation mechanism, which can quickly release pressure when the water pressure increases suddenly, avoiding the modular folding plate assembly from being deformed by impact; at the same time, the support provides stable support for the folding plate, preventing the folding plate from sagging under long-term stress. Combined with the corrosion resistance of 304 stainless steel, the overall service life of the equipment is extended compared with traditional structures.

[0013] 3. The modular folding plate assembly is anchored to the wall with bolts. If the assembly is damaged in the future, the entire modular folding plate assembly can be lifted out for inspection or replacement simply by removing the bolts, without dismantling the surrounding structure. The rubber sheet is fixed with detachable expansion bolts, which makes it easy to replace the aged rubber sheet separately without damaging the support body, making maintenance and operation convenient.

[0014] 4. The staggered arrangement of adjacent folding plates extends the water flow path, increases the residence time of water in the flocculation tank, and improves the collision efficiency between particles and flocculants in the raw water; the raw water closed unit formed by the supports and folding plates avoids short-circuiting of the water flow, ensuring that each part of the raw water can fully react. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the internal structure of a folded plate flocculation tank. Figure 2 This is a cross-sectional view of a folded plate flocculation tank. Figure 3 for Figure 1 Enlarged view of section A in the middle; Figure 4 for Figure 3 CC section view; Figure 5 for Figure 2 Enlarged view of section B; Figure 6 This is a structural diagram of the folding plate and connecting plate; The components include: 1. Flocculation tank body; 2. Baffle plate; 21. Baffle plate sheet; 22. L-shaped connecting plate; 3. Liner plate; 41. Bolt hole; 42. Bolt; 5. Perforated sludge discharge pipe; 6. Support; 7. Rubber sheet; 8. Detachable expansion bolt; 9. Pressure relief hole; 10. Baffle plate assembly; 11. Liner plate rubber gasket. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] 1. Factory prefabrication of modular folding plate assembly 10: Based on the design dimensions of the flocculation tank 1 (8m width, 5m height), modular folding plate components 10 are prefabricated in the factory.

[0018] 304 stainless steel sheet with a thickness of 3mm is used to process the folding plate 21, and 304 stainless steel sheet with a thickness of 5mm is used to process the L-shaped connecting plate 22 and the liner plate 3.

[0019] Carbon dioxide gas shielded welding is used for welding: First, weld one end of the L-shaped connecting plate 22 to the folding plate 21. Adjust the welding position (spacing 1.2m) according to the actual width of the flocculation tank 1. Then, weld the other end of the L-shaped connecting plate 22 to the liner plate 3. The welding current is controlled at 180-200A to ensure that the tensile strength of the weld is ≥500MPa.

[0020] The adjacent folding plates 21 of the modular folding plate assembly 10 are staggered at 150mm intervals (e.g. Figure 3 , 4 As shown), bolt holes 41 with a diameter of 19mm are opened on both sides of the liner plate 3 along the water inlet direction (for M18 bolts 42).

[0021] The prefabricated modular folding plate assembly 10 (single unit size 2m×5m) was transported to the construction site by a 30t heavy truck. During transportation, it was wrapped with foam cushioning pads to prevent the folding plate 21 from deforming or the weld joints from cracking.

[0022] 2. Foundation construction of flocculation tank 1 and support 6: A PC200 excavator was used to excavate the foundation pit of the flocculation tank to a depth of 300mm below the design elevation. A 100mm thick C15 concrete cushion layer was laid and cured for 3 days.

[0023] The steel reinforcement structure of the flocculation tank body 1 wall is constructed using HRB400E grade steel bars (16mm in diameter, 200mm in spacing) to ensure that the compressive strength of the wall is ≥30MPa.

[0024] Simultaneously construct the steel reinforcement structure of support pier 6: The steel reinforcement specifications of support pier 6 are consistent with the wall, with a designed height of 200mm and a width of 150mm, extending along the width direction of flocculation tank body 1. During binding, a pressure relief hole 9 channel with a diameter of 50mm is reserved (one every 500mm along the length of support pier 6). Figure 5 As shown.

[0025] Template construction: 18mm thick bamboo plywood was selected as the template for the walls of the flocculation tank 1 and the supports 6. The template was supported by Φ48×3.5mm steel pipe scaffolding (spacing 1.5m).

[0026] Concrete pouring: C30 commercial concrete is poured into the formwork using a SY5313THB470C-8 concrete pump truck. An immersion vibrator (50Hz frequency) is used for compaction (20-30 seconds per point) to prevent honeycombing and pitting. The formwork is removed after 7 days of curing, reaching 75% of the design strength. Construction of flocculation tank 1 and support 6 is then completed (e.g., ...). Figure 2 (As shown).

[0027] 3. Installation of rubber sheet 7 and perforated mud discharge pipe 5: Install rubber sheet 7: Select a 3mm thick nitrile rubber sheet 7 (70mm×70mm, area larger than the diameter of the pressure relief hole 9), and fix it to the side of the pressure relief hole 9 on the support 6 near the water outlet direction using M8 detachable expansion bolts 8 (e.g., Figure 5 As shown), tighten to a torque of 25-30 N·m to ensure that the rubber sheet 7 fits against the wall of the pressure relief hole 9.

[0028] Install perforated sludge discharge pipe 5: Select PE material perforated sludge discharge pipe 5 (diameter 110mm), lay it along the width direction of the bottom of the flocculation tank 1, and open sludge discharge holes with a diameter of 20mm in the pipe wall (one every 300mm along the length direction). One end of the perforated sludge discharge pipe 5 extends to the outside of the flocculation tank 1 and is connected to a sludge pump with a flow rate of 50m³ / h (e.g., Figure 1 (As shown).

[0029] 4. On-site installation of modular folding plate assembly 10: Lifting: A QY25V truck crane (rated lifting capacity 25t) was used to lift the modular folding plate assembly 10 into the flocculation tank 1. The position was manually adjusted to ensure that the top surface of the support 6 was in contact with the bottom surface of the folding plate pieces 21 spaced apart in the modular folding plate assembly 10. The modular folding plate assemblies 10 were arranged at 800mm intervals along the vertical flow direction of the flocculation tank 1 (5 sets in total). Figure 1 , Figure 2 As shown.

[0030] Anchoring: Place a 5mm thick nitrile rubber gasket 11 between the liner 3 and the wall of the flocculation tank 1. Mark the positions of the bolt holes 41 on the liner 3. Drill holes (19mm diameter, 80mm depth) using a Bosch GSB550 hand drill. Insert M18 bolts 42 through bolt holes 41 and anchor them to the wall. Tighten to a torque of 80-100 N·m to ensure a firm connection between the liner 3 and the wall. Figure 3 , 4 As shown in Figure 6.

[0031] 5. Debugging and Acceptance: Pressure test: Clean water is introduced into the flocculation tank 1, and the test pressure is 1.2 times the design working pressure (0.3MPa) (0.36MPa) for 24 hours. Observe the rubber sheet 7 of the pressure relief hole 9: it automatically opens to release pressure when the pressure exceeds 0.36MPa, and it fits the pressure relief hole 9 when the pressure is lower than 0.3MPa. The flocculation tank 1 has no leakage and the modular folding plate assembly 10 has no deformation.

[0032] Sludge discharge test: Inject simulated sludge with a concentration of 1% into the bottom of flocculation tank 1, start the sludge pump, and discharge more than 90% of the sludge within 30 minutes to confirm that the perforated sludge discharge pipe 5 is not blocked.

[0033] After passing the test, the vertical flow modular folding plate flocculation tank of the water purification plant was put into raw water flocculation treatment.

[0034] The working principle is as follows: When the vertical flow modular folding plate flocculation tank of this water purification plant is working, the raw water containing suspended particles, which has been pre-doped with flocculant and pre-mixed, is introduced into the vertical flow flocculation tank 1 through the water inlet system and flows from top to bottom along the height direction of the flocculation tank 1. During the flow of the raw water, it will flow through the modular folding plate components 10 arranged at intervals along the vertical flow direction of the flocculation tank 1. The adjacent and staggered folding plate pieces 21 in the modular folding plate components 10 cause the water flow to tumble up and down and form micro vortices, which not only prolongs the residence time of the raw water in the flocculation tank 1, but also promotes the full collision and aggregation of suspended particles in the raw water with flocculant to form settleable flocs. The modular structure, in which the folding plate pieces 21 are fixedly connected to the liner plate 3 by L-shaped connecting plates 22 and the liner plate 3 is anchored to the side walls of the flocculation tank 1 by bolts 42, ensures that the water flow guidance process is stable and without displacement. The modular folding plate assembly 10 is set on the support 6 at the bottom of the flocculation tank 1. On the one hand, together with the folding plate 21 set at intervals in the middle of the modular folding plate assembly 10, it forms a raw water closed unit to regulate the water flow and prevent short circuit. On the other hand, when the inlet water pressure increases suddenly, the rubber sheet 7 on the side of the pressure relief hole 9 on the support 6 near the outlet water direction will be pushed open by the water pressure, and the excess pressure will be released through the pressure relief hole 9. After the water pressure returns to normal, the rubber sheet 7 will return to its original position and fit the pressure relief hole 9 to protect the modular folding plate assembly 10. Finally, the flocs formed by the flocculation reaction settle to the bottom of the flocculation tank 1 because their density is greater than that of water. They are collected by the perforated sludge discharge pipe 5, which is laid along the width of the bottom of the flocculation tank 1 and has uniform sludge discharge holes in the pipe wall. The sludge is then transported to the outside of the flocculation tank 1 and connected to the sludge treatment equipment by the perforated sludge discharge pipe 5, thus realizing the efficient flocculation and purification of raw water.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vertical flow modular baffle flocculation tank for a water purification plant, characterized in that, The system includes a flocculation tank body (1), at least two sets of modular folding plate assemblies (10), and at least two sets of supports (6). The flocculation tank body (1) is a vertical flow structure, and its bottom is provided with a perforated sludge discharge pipe (5) along the width direction. The modular folding plate assemblies (10) are installed at intervals inside the flocculation tank body (1) along the vertical flow direction of the flocculation tank body (1). The modular folding plate assemblies (10) include at least two folding plate pieces (21), at least two L-shaped connecting plates (22), and two lining plates (3). One end of the L-shaped connecting plate (22) is fixedly connected to the folding plate piece (21), and the other end is fixedly connected to the lining plate (3). The two lining plates (3) are respectively anchored to the two side walls of the flocculation tank body (1) by bolts (42). The supports (6) are set at the bottom of the flocculation tank body (1) corresponding to the modular folding plate assemblies (10).

2. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, At least two pressure relief holes (9) are provided on the support (6), and a rubber sheet (7) is provided on the side of the pressure relief hole (9) near the water outlet direction.

3. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 2, characterized in that, The pressure relief holes (9) are equidistantly distributed along the length of the support (6); the rubber sheet (7) is fixed to the support (6) by a detachable expansion bolt (8), and the area of ​​the rubber sheet (7) is larger than the diameter of the pressure relief hole (9).

4. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, One end of the L-shaped connecting plate (22) is welded and fixed to the folding plate (21), and the other end is welded and fixed to the liner (3); the welding position of the L-shaped connecting plate (22) and the folding plate (21) can be adjusted according to the actual size of the flocculation tank (1).

5. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, Bolt holes (41) are provided on both sides of the liner (3) along the water inlet direction. The bolts (42) pass through the bolt holes (41) and are anchored to the wall of the flocculation tank (1). A liner rubber gasket (11) is sandwiched between the liner (3) and the wall of the flocculation tank (1).

6. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, The adjacent folding plates (21) in the modular folding plate assembly (10) are arranged at intervals to allow the water flow to tumble up and down between the folding plates (21).

7. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, The support (6) corresponds to a folded plate (21) that is spaced apart in the modular folded plate assembly (10), and the support (6) and the folded plate (21) together form the original water sealing unit.

8. The vertical flow modular baffle flocculation tank for a water purification plant as described in claim 7, characterized in that, The support (6) is a continuous reinforced concrete partition structure, and the support (6) extends along the width direction of the flocculation tank (1); the top surface of the support (6) is in contact with the bottom surface of the corresponding folded plate (21) in the modular folded plate assembly (10).

9. A vertical flow modular baffle flocculation tank for a water purification plant as described in claim 1, characterized in that, The perforated sludge discharge pipe (5) has several sludge discharge holes on its pipe wall, which are evenly distributed along the length of the perforated sludge discharge pipe (5); one end of the perforated sludge discharge pipe (5) extends to the outside of the flocculation tank (1) and is connected to the sludge treatment equipment.

10. A vertical flow modular baffle flocculation tank for a water purification plant as described in claim 5, characterized in that, The folding plate (21), L-shaped connecting plate (22) and liner (3) are all made of 304 stainless steel; the liner rubber gasket (11) is made of nitrile rubber.

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