Suspension clarification air flotation water treatment system

Abstract

The utility model discloses a suspension clarification air flotation water treatment system which comprises a rotational flow air flotation clarification mechanism and a U-shaped siphon filtering mechanism, the output end of the rotational flow air flotation clarification mechanism is connected with the U-shaped siphon filtering mechanism, the U-shaped siphon filtering mechanism comprises a water inlet end connected to the rotational flow air flotation clarification mechanism, the water inlet end is connected with a PAC adding device, and the water inlet end is connected with a water outlet of the U-shaped siphon filtering mechanism. The output end of the U-shaped siphon filter mechanism is connected to a clean water tank through a NaClO dosing end, and the clean water tank is provided with a water supply pipe connected to the PAC dosing equipment and the NaClO dosing end; both the rotational flow air flotation clarification mechanism and the U-shaped siphon filtering mechanism are provided with sludge discharge ports; the functions of efficiently purifying water quality, reducing energy consumption, perfecting sludge treatment and improving the automation degree are achieved, various pollutants such as organic matters, heavy metal ions and microorganisms in water are effectively removed through the synergistic effect of rotational flow air flotation clarification and U-shaped siphon filtration, and the treated water quality meets strict environmental protection standards and production and living requirements.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a suspension clarification flotation water treatment system. Background Technology

[0002] Water treatment is of paramount importance in today's society, encompassing various aspects such as industrial production, municipal water supply, and wastewater treatment. Wastewater treatment focuses on purifying urban sewage and industrial wastewater to meet discharge standards before release, thereby reducing harm to the aquatic environment.

[0003] However, existing water treatment systems have many shortcomings, and their treatment efficiency and water purification effects need to be improved:

[0004] Insufficient flocculation effect: The flocculation chamber design of traditional air flotation systems is simple and the water mixing efficiency is low, resulting in insufficient contact between flocculant and sewage, and the formed flocs are loose and have poor settling performance; for example, in the air flotation device disclosed in patent CN105174421A, the flocculation reaction zone lacks an effective hydraulic disturbance device, making it difficult to achieve uniform mixing and affecting the subsequent air flotation separation efficiency.

[0005] Backwashing relies on external water sources: Traditional filtration units (such as sand filters) need to be backwashed regularly to restore filtration capacity, but the backwashing process usually requires a large amount of clean water, resulting in water waste.

[0006] Low level of automation: Traditional systems rely heavily on manual operation for chemical dosing control, backwash triggering, and sludge discharge, making precise control difficult. For example, a case study of a municipal waterworks shows that PAC dosage needs to be adjusted based on experience, easily leading to waste or unstable treatment results.

[0007] Therefore, improvements are needed. Utility Model Content

[0008] The purpose of this invention is to provide a suspended clarification flotation water treatment system to overcome the shortcomings of the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] This application discloses a suspended clarification flotation water treatment system, including a cyclone flotation clarification mechanism and a U-shaped siphon filter mechanism. The output end of the cyclone flotation clarification mechanism is connected to the U-shaped siphon filter mechanism, and the system includes an inlet end connected to the cyclone flotation clarification mechanism. A PAC dosing device is connected to the inlet end. The output end of the U-shaped siphon filter mechanism is connected to a clear water tank through a NaClO dosing end. The clear water tank is provided with a water supply pipe connected to the PAC dosing device and the NaClO dosing end. Both the cyclone flotation clarification mechanism and the U-shaped siphon filter mechanism are provided with sludge discharge ports, which are connected to a sludge treatment mechanism.

[0011] Preferably, the cyclone flotation clarification mechanism includes a clarification tank, which is equipped with a pre-sedimentation chamber and a flocculation chamber. The pre-sedimentation chamber is connected to an inlet pipe, one end of which is connected to a distribution tank and the other end is connected to the pre-sedimentation chamber. The flocculation chamber is equipped with a turbulence device, and the output end of the flocculation chamber is connected to an activated sludge suspension zone. The activated sludge suspension zone is equipped with a sludge discharge mechanism.

[0012] Preferably, the bottom of the pre-settling chamber is provided with an activated sludge suspension zone, and a sludge discharge pipe is provided on the activated sludge suspension zone. The sludge discharge pipe is connected to a guide sludge discharge port, and the guide sludge discharge port is connected to the sludge discharge port. The bottom of the activated sludge suspension zone is provided with a vent pipe, and the output end of the vent pipe is connected to the sludge discharge port.

[0013] Preferably, the U-shaped siphon filter mechanism includes a second inlet pipe, the input end of which is connected to the vortex air flotation clarification mechanism, and the output end is connected to a filter media layer and a support layer through an inlet shaft. The bottom of the filter media layer and the support layer is connected to a connecting channel, and the connecting channel is connected to a clear water tank. The clear water tank is provided with an outlet pipe connected to the clear water pool.

[0014] Preferably, the U-shaped siphon filtration mechanism includes a siphon tube, one end of which is connected to the filter media layer, and the other end is connected to a siphon auxiliary mechanism that generates a suction effect. The siphon auxiliary mechanism draws water from above the filter media layer through the siphon tube, causing the clean water in the clean water tank to rinse the filter media layer in the opposite direction.

[0015] Preferably, the PAC dosing device includes a metering pump and a storage tank, wherein the storage tank dispenses the PAC into the inlet via the metering pump.

[0016] Preferably, the sludge treatment mechanism includes a sludge collection tank connected to the sludge discharge outlet, a sludge thickening tank connected to the sludge collection tank, and a filter press connected to the sludge thickening tank to perform solid-liquid separation of the sludge.

[0017] Preferably, the sludge thickening tank is equipped with a stirrer and a moisture content detection device, and the sludge is added after the moisture content meets the standard.

[0018] The beneficial effects of this utility model are:

[0019] (1) It has achieved the functions of efficient water purification, energy reduction, sludge treatment and automation improvement. It has brought about the synergistic effect of cyclone flotation clarification and U-shaped siphon filtration, which effectively removes a variety of pollutants such as organic matter, heavy metal ions and microorganisms from the water, so that the treated water quality meets the strict environmental protection standards and production and living needs.

[0020] (2) The filter media layer is flushed with clean water by the siphon auxiliary mechanism, which reduces the use of additional power equipment and reduces energy consumption and operating costs;

[0021] (3) By collecting, concentrating and pressing the sludge through sludge treatment facilities, solid-liquid separation can be achieved, reducing land occupation and secondary pollution, and facilitating the resource utilization of sludge.

[0022] (4) The overall system structure design facilitates automated control, reduces manual operation and monitoring, lowers labor costs, and improves the stability of treatment effect, thus solving the problems of low treatment efficiency, high energy consumption, imperfect sludge treatment and low degree of automation of traditional water treatment systems.

[0023] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of an embodiment of the suspended clarification flotation water treatment system of this utility model;

[0025] Figure 2 This is a schematic diagram of the planar structure of the swirl air flotation clarification mechanism according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the planar structure of the swirl air flotation clarification mechanism from another perspective of an embodiment of this utility model.

[0027] Figure 4 This is a top view of the U-shaped siphon filter mechanism according to an embodiment of the present invention;

[0028] Figure 5 This is a first-view planar structural schematic diagram of the U-shaped siphon filter mechanism according to an embodiment of the present invention;

[0029] Figure 6 This is a second-view planar structural schematic diagram of the U-shaped siphon filter mechanism according to an embodiment of the present invention;

[0030] Figure 7 This is a third-view planar structural schematic diagram of the U-shaped siphon filter mechanism according to an embodiment of the present invention;

[0031] In the diagram: 1. Inlet; 2. PAC dosing equipment; 3. Cyclone flotation clarification mechanism; 301. Inlet pipe one; 302. Reaction chamber; 303. Pre-sedimentation chamber; 304. Turbulence device; 305. Flocculation chamber; 306. Activated sludge suspension zone; 307. Sludge discharge pipe; 308. Guide sludge discharge port; 310. Vent pipe; 311. Sludge discharge port; 4. U-shaped siphon filter mechanism; 401. Inlet shaft; 402. Connecting channel; 403. Clear water tank; 404. Outlet pipe; 405. Inlet pipe two; 406. Siphon pipe; 407. Filter media layer; 408. Support layer; 5. Clear water tank; 6. Sludge treatment mechanism. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0033] See Figure 1 This utility model provides a suspended clarification flotation water treatment system, including a cyclone flotation clarification mechanism and a U-shaped siphon filter mechanism.

[0034] See Figure 2 , 3 The cyclone flotation clarification mechanism includes a clarification tank and a pre-settling chamber. The inlet pipe leads from the distribution tank into the pre-settling chamber. The distribution tank is used to evenly distribute the raw water to ensure a stable water flow into the pre-settling chamber. The pre-settling chamber can initially settle large particles of impurities.

[0035] After the raw water is mixed evenly with the addition of coagulant in the reaction chamber, it enters the pre-sedimentation chamber of the clarifier from the bottom through the inlet pipe. In the pre-sedimentation chamber, large particles of silt settle. After passing through the buffer, the water flows into the high-efficiency volumetric mesh flocculation chamber. The high-efficiency volumetric flocculation chamber is equipped with a mesh turbulence device. After the water flows through the turbulence device, a large number of micro vortices of different sizes are generated due to the inertial effect of the conversion of kinetic potential energy. The initial particles in the micro vortices come into contact and collide due to the inertial effect, thus causing volumetric flocculation in the entire reaction zone. As the initial particles rise along the water flow, they undergo multiple contact deformations to form dense flocculent particles, which then uniformly enter the high-volume-concentration active sludge suspension zone.

[0036] In one feasible embodiment, the activated sludge suspension zone is equipped with inclined tubes. After the activated sludge is separated by the inclined tubes, it slides down and forms a dense activated sludge suspension zone under the friction and squeezing rotation of the upper and lower circulation. It continuously adsorbs some organic matter and trace amounts of toxic heavy metal elements in the water. When it passes through the sedimentation zone of the inclined tubes, the mud and water are well separated due to the increased specific gravity of the flocs. The semi-finished clear water enters the water collection area, is collected by the water collection system, and is discharged into the filter pond through the main water collection channel.

[0037] In one feasible embodiment, the mud-water interface in the activated sludge suspension zone is controlled at about two-fifths of the height in the pool through the guide sludge discharge port. The sludge enters the sludge thickening chamber through the guide sludge discharge port, where part of the sludge settles and thickens. The clear water in the thickening chamber is transported to the water collection system through a forced water outlet pipe connected to the effluent channel.

[0038] The bottom of the pre-sedimentation chamber and the sludge thickening chamber are respectively equipped with sludge discharge pipes.

[0039] After the above optimization, the effluent turbidity of the cyclone flotation clarifier can be reduced from 3-5 NTU in the original hydraulic circulation clarifier to 0.6-1.5 NTU, significantly improving the clarification efficiency.

[0040] In one feasible embodiment, the turbulence device consists of motor-driven stirring blades, the blades being propeller-shaped.

[0041] See Figures 4-7 The U-shaped siphon filter mechanism includes an inlet pipe, a filter media layer, and a support layer. The clarified raw water enters the inlet shaft of the filter tank through the inlet pipe and then enters the filtration area below the baffle through the inlet shaft. After passing through the uniform particle filter media layer and the support layer from top to bottom, it enters the clear water tank through the connecting channel and is discharged to the clear water pool through the main outlet channel.

[0042] The filter media layer removes residual fine particles, microorganisms and other impurities in the water through interception and adsorption. The support layer supports the filter media layer and ensures that the water flows through evenly, improving the filtration effect and the stability of the filter media layer.

[0043] During the backwashing cycle, the increased filtration resistance causes the water level in the inlet shaft to rise. The siphon pipe, aided by the siphon auxiliary mechanism, forms a large siphon, drawing water from the filter bed. Clean effluent from the high-level clear water tank enters the uniform-grained quartz filter media layer through a connecting channel for backwashing, suspending the filter media and scrubbing the sand particles. The backwashing intensity is designed to remove sludge while preserving the filter membrane on the sand surface. The backwash water is collected in the sand washing tank and discharged outside the tank via the siphon pipe. The water level in the inlet shaft decreases due to the large siphon pumping, and the inlet siphon pipe stops receiving water under the action of the siphon auxiliary pipe system. This ensures effective sand washing, conserves water resources, and reduces wastewater discharge.

[0044] The siphon auxiliary mechanism uses a vacuum pump to generate negative pressure to start the siphon tube. The siphon tube draws water from above the filter media layer, causing the clean water in the clean water tank to backwash the filter media layer, removing impurities trapped in the filter media layer and restoring the filtration performance of the filter media layer. This process does not require additional power equipment, reducing energy consumption.

[0045] It also includes sludge treatment facilities, including:

[0046] Sludge collection pond: centrally collects sludge generated by the system for convenient subsequent unified treatment.

[0047] Sludge thickening tank: Through gravity settling and mechanical agitation, the water content of sludge is reduced, the volume of sludge is reduced, and it is easier to transport and process it later.

[0048] Filter press: Further separates the concentrated sludge into solid and liquid components, enabling the sludge to meet the standards for disposal or resource utilization, thereby reducing its impact on the environment.

[0049] Work process

[0050] Raw water input: High turbidity raw water enters the pre-sedimentation chamber of the vortex air flotation clarification mechanism through the inlet end, where large particles of impurities settle naturally. Then, the metering pump of the PAC dosing equipment adds flocculant to the inlet end according to the set amount. After the raw water and PAC are mixed, they enter the flocculation chamber. Then, the turbulence device is activated to form turbulence to enhance the mixing effect and improve the density of the flocs.

[0051] Air flotation separation: Water flows through the guide plate to form a vortex and enters the active sludge suspension zone. The sludge floats to the water surface and is discharged by the sewage discharge mechanism through the sludge discharge port, reducing the turbidity of the clarified water.

[0052] The clarified water enters the filter media layer of the U-shaped siphon filter mechanism through the second inlet pipe. The quartz sand filter media traps the remaining suspended solids, and the clear water flows into the clear water tank through the support layer.

[0053] The outlet pipe of the clear water tank delivers qualified water to the clear water pool, while the NaClO dosing end automatically adds disinfectant according to the water flow rate.

[0054] When the internal environment reaches a preset threshold (such as when the differential pressure sensor detects the internal pressure difference), the siphon auxiliary mechanism is activated. The vacuum pump drives the siphon tube to form a negative pressure, and the clean water tank backwashes the filter media layer. The washing wastewater is discharged into the sludge treatment mechanism through the sludge discharge port.

[0055] The sludge discharge ports of the cyclone flotation clarification unit and the U-shaped siphon filter unit regularly discharge sludge into the sludge collection tank. The sludge enters the thickening tank, and after thickening, the sludge is transported to the filter press. After high-pressure filtration, it forms a sludge cake with a moisture content of ≤60%, which can be directly transported for disposal or utilized as a resource.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A suspended clarification flotation water treatment system, characterized in that: The system includes a cyclone flotation clarification mechanism and a U-shaped siphon filter mechanism. The output end of the cyclone flotation clarification mechanism is connected to the U-shaped siphon filter mechanism. The system also includes an inlet end connected to the cyclone flotation clarification mechanism, on which a PAC dosing device is connected. The output end of the U-shaped siphon filter mechanism is connected to a clear water tank via a NaClO dosing end. The clear water tank is equipped with a water supply pipe connected to the PAC dosing device and the NaClO dosing end. Both the cyclone flotation clarification mechanism and the U-shaped siphon filter mechanism are equipped with sludge discharge ports, which are connected to a sludge treatment mechanism.

2. The suspended clarification flotation water treatment system as described in claim 1, characterized in that: The cyclone flotation clarification mechanism includes a clarification tank, which is equipped with a pre-sedimentation chamber and a flocculation chamber. The pre-sedimentation chamber is connected to an inlet pipe, one end of which is connected to a distribution tank and the other end is connected to the pre-sedimentation chamber. The flocculation chamber is equipped with a turbulence device, and the output end of the flocculation chamber is connected to an activated sludge suspension zone. The activated sludge suspension zone is equipped with a sludge discharge mechanism.

3. The suspended clarification flotation water treatment system as described in claim 2, characterized in that: The pre-settling chamber has an activated sludge suspension zone at the bottom, and a sludge discharge pipe is provided on the activated sludge suspension zone. The sludge discharge pipe is connected to a guide sludge discharge port, and the guide sludge discharge port is connected to the sludge discharge port. The activated sludge suspension zone has a vent pipe at the bottom, and the output end of the vent pipe is connected to the sludge discharge port.

4. The suspended clarification flotation water treatment system as described in claim 1, characterized in that: The U-shaped siphon filter mechanism includes a second inlet pipe. The input end of the second inlet pipe is connected to the vortex air flotation clarification mechanism, and the output end is connected to a filter media layer and a support layer through an inlet shaft. The bottom of the filter media layer and the support layer is connected to a connecting channel, and the connecting channel is connected to a clear water tank. The clear water tank is equipped with an outlet pipe connected to the clear water pool.

5. The suspended clarification flotation water treatment system as described in claim 4, characterized in that: The U-shaped siphon filtration mechanism includes a siphon tube, one end of which is connected to the filter media layer, and the other end is connected to a siphon auxiliary mechanism that generates a suction effect. The siphon auxiliary mechanism draws water from above the filter media layer through the siphon tube, causing the clean water in the clean water tank to backwash the filter media layer.

6. The suspended clarification flotation water treatment system as described in claim 1, characterized in that: The PAC dosing device includes a metering pump and a storage tank, and the storage tank dispenses the chemicals to the inlet via the metering pump.

7. The suspended clarification flotation water treatment system as described in claim 1, characterized in that: The sludge treatment facility includes a sludge collection tank connected to the sludge discharge outlet, a sludge thickening tank connected to the sludge collection tank, and a filter press connected to the sludge thickening tank to perform solid-liquid separation of the sludge.

8. The suspended clarification flotation water treatment system as described in claim 7, characterized in that: The sludge thickening tank is equipped with a stirrer and a moisture content detection device. The sludge is added after the moisture content meets the standard.

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