A perforated folded plate for a sedimentation basin and a sedimentation basin with an inclined installation of the perforated folded plate

Abstract

The utility model belongs to water treatment technical field, specifically discloses a perforated folded plate for sedimentation tank and the sedimentation tank of oblique installation perforated folded plate. The perforated folded plate is the plate -like structure of undulating extension and includes at least three folded plate tops of undulating top end and three folded plate bottoms of undulating bottom end, and the folded plate top of perforated folded plate is adjacent to the folded plate bottom and is provided with a plurality of folded plate holes on or close to the folded plate top. The water inlet and the water outlet of the sedimentation tank are separately arranged in the lower part and the upper part of the pool body, a folded plate support is fixed above the water inlet in the pool body, a plurality of aforementioned perforated folded plates are obliquely arranged on the folded plate support in the pool body, the folded plate top of the perforated folded plate faces upwards and the folded plate bottom faces downwards. The perforated folded plate top of the utility model is provided with the folded plate hole, and the sewage can flow upwards through the folded plate hole, which not only can increase the sedimentation area, but also can realize automatic sludge discharge, has the characteristics of simple structure, wide application range, high sedimentation efficiency and automatic sludge discharge.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to a perforated baffle plate for sedimentation tanks with simple structure, wide applicability, high sedimentation efficiency, and automatic sludge discharge, and a sedimentation tank with the perforated baffle plate installed at an incline. Background Technology

[0002] In water treatment processes, the process by which suspended particles in water separate from the water under the influence of gravity is called sedimentation. When the density of the particles is greater than that of water, the particles sink; conversely, when the density of the particles is less than that of water, the particles float.

[0003] Analysis of particle settling processes in horizontal flow sedimentation tanks and the principle of ideal sedimentation shows that the removal rate of suspended particles is only related to the sedimentation area of ​​the tank, and not to the tank depth. Under the condition of a fixed sedimentation tank volume, the shallower the tank, the larger the sedimentation area, and the higher the removal rate of suspended particles; this is the "shallow tank sedimentation principle." Although the sedimentation tank can be divided into several layers, its processing capacity is several times that of the original sedimentation tank, but discharging sludge in such layers is somewhat difficult. To solve the sludge discharge problem, numerous horizontal baffles can be replaced with inclined baffles, with reserved sludge discharge areas, thus creating the common inclined plate sedimentation tank. Replacing the inclined plates with tubular components (forming hexagonal or quadrilateral cross-sections) results in an inclined tube sedimentation tank.

[0004] Because inclined plate (tube) sedimentation tanks must be installed at an angle, there is always some space in the tank where the inclined plates (tubes) cannot be installed, especially in circular tanks where the effective installation space is even smaller. Moreover, since there are no openings on the inclined plates (tubes), sewage cannot pass through them and therefore cannot flow between different layers of inclined plates (tubes). Furthermore, since the inclined plates (tubes) are mostly installed in parallel, there is a certain degree of short-circuiting, and the solid-liquid separation effects cannot be superimposed, resulting in low sedimentation efficiency.

[0005] To address the issue of low treatment efficiency, existing technologies combine traditional baffled flocculation tanks with inclined plate sedimentation tanks to form a complementary solution. The baffled flocculation tank uses a high-speed rotating flow to mix water and adsorbent, removing suspended grease and large particles; while the inclined plate sedimentation tank utilizes inclined plates to promote the settling of suspended solids, removing organic matter and fine suspended solids, thereby improving treatment efficiency. Furthermore, integrating the baffle and inclined plate zones into a single unit reduces floor space. However, the need to install two separate units and coordinate water flow paths increases design and construction complexity, resulting in a more complex overall structure. Additionally, the inclined plates are prone to clogging, and the baffle zone requires regular cleaning, leading to higher maintenance costs. Moreover, treatment efficiency may decrease with changes in water volume or high organic matter content. In addition, there are adjustable electro-baffled sedimentators: current is passed through the electro-baffles, using an electric field to adsorb suspended solids. The baffle angle and current intensity can be adjusted to adapt to different water qualities, and a sludge discharge hopper at the bottom enables gravity-flow sludge removal. While electric field adsorption can remove most organic matter and heavy metals, achieving an efficiency more than three times that of ordinary inclined tube sedimentators, and requires no water pump with gravity-flow inlet and outlet water, resulting in low energy consumption, and with adjustable angle and current of the electric baffles suitable for scenarios with large fluctuations in water quality, the initial investment is high due to the need for a power supply and control system. Active solutions also lead to higher application costs. Furthermore, the electrodes require regular cleaning to prevent corrosion and scaling, thus demanding higher maintenance requirements.

[0006] Therefore, in order to enhance the sedimentation effect of the sedimentation tank, increase the effective installation space of the baffle plate in the sedimentation tank, and have a certain filtration function, this utility model proposes a sedimentation tank with a perforated baffle plate and an inclined installation of the perforated baffle plate. Utility Model Content

[0007] To address the problems mentioned in the background section, this utility model provides a perforated baffle plate for sedimentation tanks that is simple in structure, widely applicable, has high sedimentation efficiency, and can automatically discharge sludge. It also provides a sedimentation tank with the perforated baffle plate installed at an angle.

[0008] The perforated folding plate for sedimentation tank of this utility model is implemented as follows: the perforated folding plate has an undulating plate-like structure, the perforated folding plate includes at least three folding plate tops at the top of the undulation and three folding plate bottoms at the bottom of the undulation, the folding plate tops and folding plate bottoms of the perforated folding plate are arranged adjacent to each other, and a number of folding plate holes are arranged at intervals on or near the folding plate tops of the perforated folding plate.

[0009] Furthermore, the perforated folding plate is an M-shaped folding plate, a corrugated folding plate, or an irregularly shaped folding plate.

[0010] Furthermore, the top of the folded plate is a flat surface, an arc surface, or a fold line, and the folded plate hole is provided on the top of the folded plate that is a flat surface or an arc surface, or the folded plate hole is provided on the perforated folded plate near the top of the folded plate that is a fold line, and the folded plate hole is spaced apart along the extension direction of the top of the folded plate.

[0011] Furthermore, the diameter of the folding plate hole is 1mm to 40mm.

[0012] Furthermore, the perforated folding plate is made of metal or plastic material.

[0013] The sedimentation tank with inclined perforated folding plates of this utility model is implemented as follows: it includes a tank body, an inlet, an outlet, and a sludge discharge port. The inlet is located at the lower part of the tank body, the outlet is located at the upper part of the tank body, and the sludge discharge port is located at the bottom of the tank body. A folding plate support is fixedly installed above the inlet in the tank body. Several perforated folding plates are inclinedly installed on the folding plate support in the tank body. The top of the perforated folding plates in the tank body faces upward and the bottom of the perforated folding plates faces downward.

[0014] Furthermore, the perforated holes of adjacent perforated plates in the pool body are staggered, and the perforated plate support is a grid plate or a flat plate with several through holes.

[0015] Furthermore, a mud guide plate is provided on the lower end face of the inclined perforated folding plate near the pool wall, and a mud discharge channel is provided between the mud guide plate and the pool wall. A mud leakage hole connected to the mud discharge channel is provided on the folding plate support.

[0016] Furthermore, an overflow weir is provided in the pool body above the top of the folding plate or at the outlet.

[0017] Furthermore, the perforated folding plate installed on the folding plate support inside the pool has an inclination angle of 30° to 70°.

[0018] This utility model has the following beneficial effects:

[0019] 1. The perforated baffle plate of this utility model, with its perforated holes at the top, allows wastewater to flow upwards layer by layer through the inclined perforated baffle plate in the sedimentation tank, forming a three-dimensional sedimentation path. This avoids short-circuit effects and increases the turbulence of the water flow, promoting collision and aggregation between suspended particles and improving particle settling performance. Furthermore, the inclined perforated baffle plate arrangement within the tank, with the top of the baffle plate facing upwards and the bottom downwards, is similar to that of an inclined plate sedimentation tank, utilizing the "shallow pool sedimentation principle." This not only increases the sedimentation area but also shortens the particle settling distance, significantly reducing sedimentation time and thus greatly improving sedimentation efficiency. In particular, the staggered arrangement of the perforated holes of adjacent baffle plates guides the water flow to form a three-dimensional vortex, extending the floc residence time and further enhancing the turbulence effect of the water flow, thus strengthening the sedimentation process.

[0020] 2. The perforated folding plate of this utility model has an interval between the top and bottom of the folding plate and the design of the folding plate holes, which makes it more adaptable to sewage with different water quality characteristics (such as different turbidity, suspended solids particle size distribution, etc.), thus broadening the applicable scenarios of sedimentation tanks. It can be used for both domestic sewage and industrial wastewater treatment.

[0021] 3. The perforated baffle plate of this utility model has a certain aperture range (e.g., 1mm to 40mm). When water flows through the baffle plate, it can intercept and filter some of the larger suspended particles in the sewage. The intercepted and filtered sludge settles at the bottom of the next layer of perforated baffle plate and settles under the action of gravity, thus realizing automatic sludge discharge in the filtration process. Therefore, backwashing is not required or the frequency of backwashing is reduced. In particular, a sludge guide plate structure is provided on the lower side of the inclined perforated baffle plate in the tank. Under the action of gravity, the settled sludge slides down the inclined surface of the perforated baffle plate to the sludge guide plate, collects at the bottom through the sludge guide plate, and is finally automatically discharged from the sewage outlet located near the bottom of the sludge guide plate on the side wall of the tank. Therefore, no additional complex sludge discharge equipment and frequent manual operation are required, realizing the automatic sludge discharge function and reducing operation and maintenance costs.

[0022] 4. The perforated folded plate of this utility model not only has a simple structural design and its undulating plate-like form is easy to process and manufacture, but also can adapt to irregular pools such as circles and rectangles through three-dimensional arrangement, eliminating the installation dead angles of traditional inclined plates (pipes), expanding the effective installation area, and thus enhancing its applicability. Especially in the installation process of sedimentation tanks, compared with the complex structure of traditional folded plates and inclined plates, its installation process is much simpler, eliminating the need to install multiple sets of equipment separately and coordinate complex water flow paths, greatly reducing design and construction difficulty, improving installation efficiency, and reducing construction cycle and cost.

[0023] In summary, this utility model, through the structural optimization design of the perforated folding plate, the innovative interlayer flow of the perforated folding plate in the sedimentation tank, the self-flowing sludge discharge of the sludge guide plate, and the three-dimensional compact layout, breaks through the bottleneck of sedimentation technology with zero energy consumption, low maintenance, and high adaptability. It is especially suitable for sewage treatment scenarios with limited land and large fluctuations in water quality, and its comprehensive performance and economy are significantly better than existing solutions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the irregular folded plate structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the irregular folding plate installation structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the M-shaped folding plate structure of this utility model;

[0027] Figure 4This is a schematic diagram of the M-shaped folding plate installation structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the corrugated folded plate structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the corrugated folding plate installation structure of this utility model;

[0030] Figure 7 This is a schematic diagram of the sedimentation tank structure of this utility model;

[0031] In the diagram: 1-Perforated folding plate, 11-Top of folding plate, 12-Bottom of folding plate, 13-Folding plate hole, 2-Pool body, 3-Inlet, 4-Outlet, 5-Folding plate support, 6-Sludge guide plate, 7-Drain outlet, 8-Overflow weir. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0033] like Figure 1 As shown, the perforated folding plate for sedimentation tank of this utility model has a plate-like structure that extends in an undulating manner. The perforated folding plate 1 includes at least three folding plate tops 11 at the top of the undulation and three folding plate bottoms 12 at the bottom of the undulation. The folding plate tops 11 and folding plate bottoms 12 of the perforated folding plate 1 are arranged adjacent to each other. A plurality of folding plate holes 13 are provided at intervals on or near the folding plate tops 11 of the perforated folding plate 1.

[0034] The perforated folding plate 1 is an M-shaped folding plate, a corrugated folding plate, or an irregularly shaped folding plate.

[0035] The top of the folded plate 11 is a flat surface, an arc surface, or a fold line. The folded plate hole 13 is provided on the flat or arc surface of the top of the folded plate 11, or the folded plate hole 13 is provided on the perforated folded plate 1 near the folded plate top 11. The folded plate hole 13 is provided at intervals along the extending direction of the top of the folded plate 11.

[0036] The diameter of the folding plate hole 13 is 1mm to 40mm.

[0037] The perforated folding plate 1 is made of metal or plastic material.

[0038] The sedimentation tank of this utility model with inclined perforated folding plates includes a tank body 2, an inlet 3, an outlet 4, and a sludge discharge port 7. The inlet 3 is located at the lower part of the tank body 2, the outlet 4 is located at the upper part of the tank body 2, and the sludge discharge port 7 is located at the bottom of the tank body 2. A folding plate support 5 is fixedly installed above the inlet 3 inside the tank body 2. A plurality of the aforementioned perforated folding plates 1 are inclinedly installed on the folding plate support 5 inside the tank body 2. The top 11 of the perforated folding plates 1 inclined inside the tank body 2 faces upward and the bottom 12 of the perforated folding plates faces downward.

[0039] The folding holes 13 of adjacent perforated folding plates 1 in the pool body 2 are staggered, and the folding plate support 5 is a grid plate or a flat plate with several through holes.

[0040] The perforated folding plate 1 of this utility model is inclined and has a mud guide plate 6 near the pool wall of the pool body 2. There is a mud discharge channel between the mud guide plate 6 and the pool wall of the pool body 2. The folding plate support 5 is provided with a mud leakage hole that connects to the mud discharge channel.

[0041] An overflow weir 8 is provided inside the pool body 2 above the top of the folding plate 11 or at the outlet 4.

[0042] The perforated folding plate 1 installed on the folding plate support 5 inside the pool body 2 has an inclination angle of 30°~70°.

[0043] The lower part of the pool body 2 is provided with an inverted cone-shaped sludge collection section, the water inlet 3 is provided on the side wall of the pool body 2 above the sludge collection section, and the sludge discharge port 7 is provided at the bottom end of the sludge collection section.

[0044] The water inlet 3 is a water distribution flower wall.

[0045] The working principle and process of this utility model:

[0046] like Figure 7As shown, during operation, sewage flowing into the tank 2 from the inlet 3 flows upward through the baffle support 5. Since the baffle assembly consists of multiple parallel and inclined perforated baffles 1, the sewage flows upward layer by layer through the inclined perforated baffles 1 in the tank 2, forming a three-dimensional sedimentation path. This increases the turbulence of the water flow and promotes the collision and aggregation of suspended particles. Furthermore, the staggered arrangement of the baffle holes 13 of adjacent perforated baffles 1 not only guides the water flow to form a three-dimensional vortex, prolonging the floc residence time and further enhancing the turbulence effect of the water flow, thus strengthening the sedimentation process, but also intercepts and filters some larger suspended particles in the sewage. The intercepted and filtered sludge... The sediment settles at the bottom of the next layer of perforated baffle plate 1 and settles under the action of gravity, thus realizing automatic sludge discharge in the filtration process; a sludge guide plate 6 is set on the lower end face of the specially inclined perforated baffle plate 1 near the pool wall of the pool body 2, and there is a sludge discharge channel between the sludge guide plate 6 and the pool wall of the pool body 2, so that the settled sludge slides down the inclined surface of the perforated baffle plate 1 under the action of gravity to the sludge discharge channel between the sludge guide plate 6 and the pool wall, and collects through the sludge leakage hole on the baffle plate support 5 into the inverted cone-shaped sludge collection part of the pool body 2, and is finally automatically discharged from the sewage outlet 7 at the bottom of the inverted cone-shaped sludge collection part; the clean water passing through the baffle plate assembly overflows the overflow weir 8 and finally flows out from the outlet 4, completing the sewage sedimentation and filtration.

[0047] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A perforated baffle plate for a sedimentation tank, characterized in that: The perforated folding plate (1) has an undulating plate-like structure. The perforated folding plate (1) includes at least three folding plate tops (11) at the top of the undulation and three folding plate bottoms (12) at the bottom of the undulation. The folding plate tops (11) and folding plate bottoms (12) of the perforated folding plate (1) are arranged adjacent to each other. A number of folding plate holes (13) are arranged at intervals on or near the folding plate tops (11) of the perforated folding plate (1).

2. The perforated baffle plate for sedimentation tank according to claim 1, characterized in that: The perforated folding plate (1) is an M-shaped folding plate, a corrugated folding plate, or an irregular folding plate.

3. The perforated baffle plate for sedimentation tank according to claim 1, characterized in that: The top of the folded plate (11) is a flat surface, an arc surface or a fold line. The folded plate hole (13) is provided on the top of the folded plate (11) which is a flat surface or an arc surface, or the folded plate hole (13) is provided on the perforated folded plate (1) near the top of the folded plate (11) which is a fold line. The folded plate hole (13) is provided at intervals along the extension direction of the top of the folded plate (11).

4. The perforated baffle plate for sedimentation tank according to claim 1, characterized in that: The diameter of the folding plate hole (13) is 1mm to 40mm.

5. The perforated baffle plate for sedimentation tanks according to claim 1, 2, 3 or 4, characterized in that: The perforated folding plate (1) is made of metal or plastic material.

6. A sedimentation tank with an inclined perforated baffle plate, comprising a tank body (2), an inlet (3), an outlet (4), and a sludge discharge port (7), wherein the inlet (3) is located at the lower part of the tank body (2), the outlet (4) is located at the upper part of the tank body (2), and the sludge discharge port (7) is located at the bottom of the tank body (2); characterized in that: A folding plate bracket (5) is fixedly installed above the water inlet (3) inside the pool body (2). Several perforated folding plates (1) as described in any one of claims 1 to 5 are inclinedly installed on the folding plate bracket (5) inside the pool body (2). The top (11) of the perforated folding plate (1) inclined inside the pool body (2) faces upward and the bottom (12) faces downward.

7. The sedimentation tank with inclined perforated baffles according to claim 6, characterized in that: The folding holes (13) of adjacent perforated folding plates (1) in the pool body (2) are staggered, and the folding plate support (5) is a grid plate or a flat plate with several through holes.

8. The sedimentation tank with inclined perforated baffles according to claim 6, characterized in that: A mud guide plate (6) is provided on the lower end face of the perforated folding plate (1) which is inclined and close to the pool wall of the pool body (2). There is a mud discharge channel between the mud guide plate (6) and the pool wall of the pool body (2). A mud leakage hole connected to the mud discharge channel is provided on the folding plate support (5).

9. The sedimentation tank with inclined perforated baffles according to claim 6, characterized in that: An overflow weir (8) is provided inside the pool body (2) above the top of the folding plate (11) or at the outlet (4).

10. The sedimentation tank with inclined perforated baffles according to claim 6, 7, 8 or 9, characterized in that: The perforated folding plate (1) installed on the folding plate support (5) inside the pool body (2) has an inclination angle of 30°~70°.

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