A sedimentation and filtration integrated water treatment device

Abstract

The utility model relates to a kind of integrated water treatment device of sedimentation filtration, including the sedimentation tank and clear liquid tank of abutment arrangement, the water inlet is provided in the side of the sedimentation tank away from the clear liquid tank, the other side is provided with filter box, the filter box middle part is provided with baffle, inside is isolated as the filter tank and buffer tank of upper end through arrangement, the filter tank is located in the sedimentation tank, lower end opening is arranged, the buffer tank is located in clear liquid tank, lower end is closed arrangement, the filter box top is matched with cover;Filter tank is provided with filter core subassembly;The buffer tank bottom is connected with drain pipe by infusion pipeline, the clear liquid tank bottom is provided with outlet pipe, the infusion pipe is also connected with backwashing pipe;Electromagnetic valve is all provided on drain pipe and backwashing pipe.The utility model has the advantages of small floor area, less filler demand, and good backflushing effect.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an integrated sedimentation and filtration water treatment device. Background Technology

[0002] Sedimentation tanks are crucial components in water treatment plants, separating sludge into solids and water. A filtration system is installed at the rear of the sedimentation tank to remove suspended solids. Supernatant flows from the surface of the sedimentation tank into the filtration system, while water enters from the top, passes through the filter to remove suspended solids, and then flows out from the bottom. The filtration system consists of a filter layer at the top and a support layer at the bottom. Regular backwashing is required; backwash water flows from bottom to top, and the wastewater containing impurities flows to a sludge tank or equalization tank.

[0003] The current shortcomings are as follows:

[0004] (1) Sedimentation tanks and filtration devices are set up separately, which takes up a large area; (2) The filter packing of the filtration device (taking sand filter as an example) contains a large amount of support layer gravel in addition to the filter layer. The amount of packing is large, the workload of replacing the packing is large, and the cost is high; (3) The backwashing of sand filter adopts the bottom-up method. The backwashing water pressure is not easy to control. If the pressure is too high, it will easily disturb the packing and even flush some of the packing out of the sand filter. If the backwashing pressure is insufficient, the impurities in the filter media are not easily carried out with the backwashing water, which affects the backwashing effect, thereby shortening the packing replacement cycle and increasing the cost. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide an integrated sedimentation and filtration water treatment device with small footprint, low packing requirements, and good backwashing effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An integrated sedimentation and filtration water treatment device includes a sedimentation tank and a clarified liquid tank adjacent to each other. The sedimentation tank has an inlet on one side away from the clarified liquid tank and a filter box on the other side. A partition is installed in the middle of the filter box, dividing its interior into a filter tank and a buffer tank that are connected at the top. The filter tank is located inside the sedimentation tank and has an open bottom. The buffer tank is located inside the clarified liquid tank and has a closed bottom. The top of the filter box is fitted with a cover. A filter element assembly is installed inside the filter tank. The bottom of the buffer tank is connected to a drain pipe via a delivery pipe. The bottom of the clarified liquid tank has an outlet pipe, and the delivery pipe is also connected to a backwash pipe. Solenoid valves are installed on both the drain pipe and the backwash pipe.

[0008] During operation, the wastewater to be treated flows into the sedimentation tank through the inlet, where cement separation is completed. The supernatant overflows into the buffer tank through the filter box and is then discharged into the clear water tank for further treatment. During filtration, the filter cartridges work from bottom to top. Due to the weight of the suspended solids, they are trapped on the bottom surface of the sand filter or automatically settle to the bottom of the sedimentation tank, resulting in better filtration and reducing the thickness and amount of filter media. Since the sludge discharge frequency of the sedimentation tank is generally much higher than the backwashing frequency of the filter, no additional sludge discharge is required when backwashing the sedimentation tank after sludge discharge. Backwash water is introduced into the backwash pipe, flows into the filter cartridges by gravity after passing through the buffer tank, and is discharged into the sedimentation tank from the bottom. The backwash water does not need to be discharged to the sludge tank or equalization tank for further treatment, saving sludge tank or equalization tank capacity and reducing secondary treatment costs. Backwashing water flows from top to bottom, backwashing the filter cartridge assembly and the deposits at the bottom of the filter box. This method offers higher backwashing efficiency and easier cleaning. By controlling the height of the backwash water within the filter box, the backwashing pressure and intensity can be controlled, effectively protecting the filter cartridge structure and avoiding the loss of packing material and damage to the packing gradation caused by the current bottom-to-top backwashing method, which requires high-pressure water. The integrated sedimentation and filtration water treatment device provided in this solution integrates the filtration device within the sedimentation tank. Compared to a separate filtration device, this reduces the equipment's footprint. Furthermore, the use of sedimentation followed by filtration and a bottom-inlet, top-outlet filtration method ensures efficient and stable backwashing.

[0009] Preferably, the filtration assembly includes a stainless steel screen disposed at the bottom of the filtration tank, on which sand and gravel filler, filter media and gravel are disposed in sequence, and the height of the filter element is lower than the height of the partition.

[0010] In this way, the filter element assembly is prevented from entering the buffer pool while ensuring the filtration effect.

[0011] Preferably, the backwash pipe is connected to the outlet pipe via a T-junction, and a water pump is installed on the backwash pipe.

[0012] In this way, the filtered clear liquid can be used as backwashing liquid, which can reduce the amount of additional backwashing water used, save energy, and improve economic efficiency.

[0013] Preferably, the filter box and the cover are connected by bolts.

[0014] This avoids external environmental contamination of the internal water and filter elements during filtration and backwashing, and also facilitates replacement of the filter elements.

[0015] Preferably, the infusion tube is connected to the filter box through multiple branch pipes.

[0016] This ensures the rapid discharge of the filtered liquid.

[0017] In summary, this solution has the advantages of small footprint, low filler requirements, and good backflushing effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an integrated sedimentation and filtration water treatment device according to the present invention.

[0019] Figure 2 for Figure 1 A sectional view.

[0020] Figure 3 This is a schematic diagram of the internal structure of an integrated sedimentation and filtration water treatment device.

[0021] Figure 4 for Figure 3 A schematic diagram of the internal structure of the filter box. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] like Figure 1-4 As shown, an integrated sedimentation and filtration water treatment device includes a sedimentation tank 1 and a clear liquid tank 11 adjacent to each other. An inlet 12 is located on the side of the sedimentation tank away from the clear liquid tank, and a filter box 13 is located on the other side. A partition 14 is provided in the middle of the filter box, dividing the interior into a filter tank 15 and a buffer tank 16 that are connected at the upper end. The filter tank is located inside the sedimentation tank and has an open lower end. The buffer tank is located inside the clear liquid tank and has a closed lower end. A cover 17 is fitted on the top of the filter box. A filter element assembly is installed inside the filter tank. The bottom of the buffer tank is connected to a drain pipe 19 via a liquid delivery pipe 18. A water outlet pipe 2 is provided at the bottom of the clear liquid tank. The liquid delivery pipe is also connected to a backwash pipe 21. Solenoid valves 22 are installed on both the drain pipe and the backwash pipe.

[0024] During operation, the wastewater to be treated flows into the sedimentation tank through the inlet, where cement separation is completed. The supernatant overflows into the buffer tank through the filter box and is then discharged into the clear water tank for further treatment. During filtration, the filter cartridges work from bottom to top. Due to the weight of the suspended solids, they are trapped on the bottom surface of the sand filter or automatically settle to the bottom of the sedimentation tank, resulting in better filtration and reducing the thickness and amount of filter media. Since the sludge discharge frequency of the sedimentation tank is generally much higher than the backwashing frequency of the filter, no additional sludge discharge is required when backwashing the sedimentation tank after sludge discharge. Backwash water is introduced into the backwash pipe, flows into the filter cartridges by gravity after passing through the buffer tank, and is discharged into the sedimentation tank from the bottom. The backwash water does not need to be discharged to the sludge tank or equalization tank for further treatment, saving sludge tank or equalization tank capacity and reducing secondary treatment costs. Backwashing water flows from top to bottom, backwashing the filter cartridge assembly and the deposits at the bottom of the filter box. This method offers higher backwashing efficiency and easier cleaning. By controlling the height of the backwash water within the filter box, the backwashing pressure and intensity can be controlled, effectively protecting the filter cartridge structure and avoiding the loss of packing material and damage to the packing gradation caused by the high-pressure water required for bottom-to-top backwashing. The integrated sedimentation and filtration water treatment device provided in this solution integrates the filtration unit within the sedimentation tank and adopts a pre-sedimentation and post-filtration filtration method with bottom-inlet and top-outlet water flow, reducing the equipment's footprint and ensuring efficient and stable backwashing. Compared to a separate filtration unit, this integrated sedimentation and filtration water treatment device reduces the equipment's footprint and ensures efficient and stable backwashing.

[0025] Specifically, the sedimentation tank is a commonly used sedimentation tank in the field. The top of the side wall at the outlet end is provided with an opening for installing the filter box. The other sedimentation tanks require the same sludge removal, chemical dosing, and stirring devices as the current sedimentation tanks. These are common technical means used by those skilled in the art and are existing technologies that have not been described in detail in this document.

[0026] In implementation, the filter assembly includes a stainless steel screen 23 disposed at the bottom of the filter tank, on which sand and gravel filler 24, filter media 25, and crushed gravel 26 are arranged in sequence. The height of the filter element is lower than the height of the partition. In this way, while ensuring the filtration effect, the filter element assembly is prevented from entering the buffer tank.

[0027] Specifically, the filter media includes, but is not limited to, filtered quartz sand.

[0028] In practice, the backwash pipe is connected to the outlet pipe via a T-junction, and a water pump 27 is installed on the backwash pipe. This allows the filtered clear liquid to be used as the backwash fluid, reducing the amount of additional backwash water used, saving energy, and improving economic efficiency.

[0029] In practice, the filter box and the cover are connected by bolts. This prevents external environmental contamination of the internal water and filter element assembly during filtration and backwashing, prevents excessive backwash water from overflowing from the top, and facilitates replacement of the filter element assembly.

[0030] In practice, the infusion tube is connected to the filter box via multiple branch pipes 28. This ensures the rapid discharge of the filtered liquid.

[0031] Beneficial effects:

[0032] (1) By placing the filter box inside the sedimentation tank and integrating it with the sedimentation tank, the floor space can be reduced under the same treatment capacity conditions. The filter device does not have a large amount of supporting packing, which makes it easy to replace and reduces replacement costs.

[0033] (2) The filtration method of this integrated device is bottom inlet and top outlet. Due to the weight of the suspended solids, the suspended solids are more likely to be intercepted on the bottom surface of the filter device or automatically settled to the bottom of the sedimentation tank, resulting in better filtration effect. It can reduce the thickness and amount of filter media. The backwash water is from top to bottom, which is consistent with the direction of gravity of the impurities, resulting in better and more thorough backwashing effect.

[0034] (3) The backwash water first enters the buffer tank and then overflows into the sand filter device to avoid the backwash water impacting the packing. The sand filter device backwashes from top to bottom. The height of the backwash water can be adjusted according to the blockage of the packing to control the backwash pressure and backwash intensity.

[0035] (4) Backwash water enters the sedimentation tank, and impurities settle into the sedimentation tank and are discharged through sludge discharge. Compared with the existing backwash water entering the equalization tank or sludge tank, this can reduce wastewater repeated treatment, reduce operating costs, and reduce the load on the sludge tank.

[0036] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An integrated sedimentation and filtration water treatment device, comprising a sedimentation tank and a clarified liquid tank adjacent to each other, wherein an inlet is provided on the side of the sedimentation tank away from the clarified liquid tank, and a filter box is provided on the other side, characterized in that, The filter box has a partition in the middle, which divides the interior into a filter pool and a buffer pool that are connected at the top. The filter pool is located in the sedimentation tank and has an open bottom. The buffer pool is located in the clear liquid pool and has a closed bottom. The top of the filter box is fitted with a cover. A filter element assembly is installed in the filter pool. The bottom of the buffer pool is connected to a drain pipe through a liquid delivery pipe. The bottom of the clear liquid pool is provided with a water outlet pipe. The liquid delivery pipe is also connected to a backwash pipe. Solenoid valves are installed on both the drain pipe and the backwash pipe.

2. The integrated sedimentation and filtration water treatment device according to claim 1, characterized in that, The filter element assembly includes a stainless steel screen disposed at the bottom of the filter tank, on which sand and gravel filler, filter media and gravel are disposed in sequence, and the height of the filter element is lower than the height of the partition.

3. The integrated sedimentation and filtration water treatment device according to claim 2, characterized in that, The backwash pipe is connected to the outlet pipe via a T-junction, and a water pump is installed on the backwash pipe.

4. The integrated sedimentation and filtration water treatment device according to claim 1, characterized in that, The filter box and the cover are connected by bolts.

5. The integrated sedimentation and filtration water treatment device according to claim 1, characterized in that, The infusion tube is connected to the filter box through multiple branch pipes.

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