High-density sedimentation tank with sludge monitoring function

Abstract

The utility model belongs to the technical field of sewage treatment devices, and particularly relates to a high-density sedimentation tank with a sludge monitoring function. Comprising a water inlet area, a mixing tank, a flocculation tank, a sedimentation tank and a water outlet channel which are sequentially communicated, and further comprises an equipment room and a sampling room which are adjacent to the sedimentation tank, and a sludge discharge pump is arranged in the equipment room; the interior of the settling pond is divided into a buffer area and an inclined plate settling area through a guide wall, multiple layers of sampling pipes are upwards distributed at intervals from the pond bottom in the height direction of the buffer area, the water inlet end of each sampling pipe penetrates through the guide wall and extends into the inclined plate settling area, and the water outlet end of each sampling pipe extends into the sampling chamber. By arranging a plurality of layers of sampling pipes in the sedimentation tank, the real-time monitoring of the sludge sedimentation states of different sludge layers is realized, a data basis is provided for accurate setting of sludge discharge time and dynamic adjustment of the dosage, and the sludge treatment efficiency and precision are improved; meanwhile, the dosage can be flexibly adjusted according to the actual water quality, agent waste is avoided, it is ensured that effluent reaches the standard, and the operation cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment devices, specifically relating to a high-density sedimentation tank with sludge monitoring function. Background Technology

[0002] In the field of wastewater treatment, high-density sedimentation tanks are widely used as efficient water treatment equipment to remove suspended solids, colloids, and some dissolved pollutants from wastewater. Traditional high-density sedimentation tanks typically include an inlet zone, mixing tank, flocculation tank, sedimentation tank, and effluent channel. By adding coagulants (such as PAC) and flocculants (such as PAM) to the wastewater, suspended solids and colloidal particles in the wastewater form larger flocs, thus achieving sludge-water separation in the sedimentation tank. The supernatant is discharged through the effluent channel, while the settled sludge is discharged externally via a sludge pump. However, because the sedimentation tank is relatively deep, and the upper layer is usually equipped with structures such as inclined plate packing to enhance the sedimentation effect, these structures obstruct the operator's view to some extent, making it difficult to directly observe the state of the sludge and the depth of the sludge layer. Therefore, in actual operation, the setting of the sludge discharge time often relies on experience and calculations, making it difficult to precisely adjust according to the actual sedimentation situation of the sludge. This may not only lead to waste of reagents or unstable treatment effects, but also increase operating costs and the risk of effluent quality exceeding standards. Utility Model Content

[0003] To address the shortcomings of the existing technology, the present invention aims to provide a high-density sedimentation tank with sludge monitoring function. By arranging multiple sampling tubes in the sedimentation tank, the sedimentation state of sludge in different sludge layers can be monitored in real time, providing data for precise setting of sludge discharge time and dynamic adjustment of chemical dosage, thereby improving sludge treatment efficiency and accuracy. At the same time, the dosage can be flexibly adjusted according to the actual water quality, avoiding chemical waste, ensuring that the effluent meets the standards, and reducing operating costs.

[0004] This utility model is achieved using the following technical solution:

[0005] The high-density sedimentation tank with sludge monitoring function includes an inlet zone, a mixing tank, a flocculation tank, a sedimentation tank, and an outlet channel connected in sequence. It also includes an equipment room and a sampling room adjacent to the sedimentation tank. The sampling room is located above the equipment room and is equipped with a sludge discharge pump. The inlet of the sludge discharge pump is connected to a conical sludge hopper at the bottom of the sedimentation tank. The sedimentation tank is divided into a buffer zone and an inclined plate sedimentation zone by a guide wall. Multiple layers of sampling tubes are arranged at intervals from the bottom of the tank upward along the height direction of the buffer zone. The inlet end of each sampling tube extends through the guide wall into the inclined plate sedimentation zone, and the outlet end extends to the sampling room. The vertical spacing between each layer of sampling tubes is 0.7-1.2m, and the vertical distance from the bottom of the sedimentation tank to the bottom of the lowest layer of sampling tubes is more than 0.5m. The horizontal spacing between each layer of sampling tubes is more than 0.4m.

[0006] The mixing tank and flocculation tank are each equipped with a stirring device, and a sludge scraper is installed in the inclined plate sedimentation zone.

[0007] The mixing tank is connected to a PAC dosing pipeline, and the flocculation tank is connected to a PAM dosing pipeline.

[0008] The upper part of the inclined plate sedimentation zone is provided with inclined plate packing.

[0009] A water collection trough is provided above the inclined plate packing, and the outlet of the water collection trough is connected to the water outlet channel.

[0010] The high-density sedimentation tank with sludge monitoring function is equipped with a sampling valve with graduation markings at the outlet end of each sampling tube in the sampling chamber.

[0011] The high-density sedimentation tank with sludge monitoring function operates on the following principle:

[0012] The incoming water to the high-density sedimentation tank first enters the inlet area, then flows sequentially through the mixing tank and flocculation tank. In the mixing tank, coagulant is added via the PAC dosing line, and in the flocculation tank, flocculant is added via the PAM dosing line, causing suspended solids and colloidal particles in the wastewater to form larger flocs. The formed flocs then enter the sedimentation tank, which is divided into a buffer zone and an inclined plate sedimentation zone by a guide wall. The inclined plate sedimentation zone is equipped with inclined plate packing to enhance the sedimentation effect, and also includes a sludge scraper to scrape the sludge from the bottom of the sedimentation tank into a conical sludge hopper below the sedimentation zone, preventing sludge accumulation. During sedimentation, the sludge falls along the inclined plate packing into the conical sludge hopper below the sedimentation zone, while the supernatant is collected in a collection trough above the inclined plate packing and discharged into the effluent channel. Simultaneously, multiple layers of sampling pipes are spaced upwards from the bottom of the tank along the height of the buffer zone, with each layer extending to a sampling chamber. Each sampling pipe outlet in the sampling chamber is equipped with a graduated sampling valve. Sampling tubes at different heights are distinguished by sampling valves with graduated markings at their outlets. Operators can accurately identify the samples collected from different height tubes based on the graduations on the sampling valves, thus enabling real-time collection of sludge samples from different sludge layers. Operators can dynamically adjust the dosage of chemicals and the sludge discharge time based on the sampling results to optimize sludge treatment. A sludge discharge pump located in the equipment room is responsible for discharging the settled sludge for further treatment, thereby completing the entire wastewater treatment process.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] (1) The high-density sedimentation tank with sludge monitoring function described in this utility model realizes real-time monitoring of the sedimentation state of sludge in different sludge layers by arranging multiple sampling tubes at intervals from the bottom of the tank upward along the height direction in the sedimentation tank. This provides data basis for the precise setting of sludge discharge time and the dynamic adjustment of chemical dosage, effectively improving the efficiency and accuracy of sludge treatment.

[0015] (2) By monitoring the sludge status in real time, the high-density sedimentation tank with sludge monitoring function described in this utility model can flexibly adjust the dosage according to the actual water quality, avoiding the waste of chemicals caused by excessive dosing, and ensuring the stable compliance of the effluent quality, thereby reducing operating costs while ensuring the treatment effect.

[0016] (3) The high-density sedimentation tank with sludge monitoring function described in this utility model makes the operation of the high-density sedimentation tank more intelligent and refined by introducing sludge monitoring function, which can better adapt to changes in water quality, improve the stability and reliability of the entire sewage treatment system, and provide a strong guarantee for the long-term stable operation of the sewage treatment plant. Attached Figure Description

[0017] Figure 1 This is a top view of the high-density sedimentation tank with sludge monitoring function described in this utility model.

[0018] Figure 2 for Figure 1 Full sectional view at point AA;

[0019] Figure 3 for Figure 1 Full sectional view at point BB;

[0020] Figure 4 for Figure 1 Full sectional view at point CC;

[0021] In the diagram: 1. Inlet area; 2. Mixing tank; 3. Flocculation tank; 4. Sedimentation tank; 5. Outlet channel; 6. Equipment room; 7. Sampling room; 8. Sludge pump; 9. Guide wall; 10. Buffer zone; 11. Inclined plate sedimentation zone; 12. Sampling pipe; 13. Agitator; 14. Sludge scraper; 15. PAC dosing line; 16. PAM dosing line; 17. Inclined plate packing; 18. Water collection tank; 19. Sampling valve. Detailed Implementation

[0022] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-4As shown, the high-density sedimentation tank with sludge monitoring function includes an inlet zone 1, a mixing tank 2, a flocculation tank 3, a sedimentation tank 4, and an outlet channel 5 connected in sequence. It also includes an equipment room 6 and a sampling room 7 adjacent to the sedimentation tank 4. The sampling room 7 is located above the equipment room 6. The equipment room 6 is equipped with a sludge discharge pump 8. The inlet of the sludge discharge pump 8 is connected to the conical sludge hopper at the bottom of the sedimentation tank 4. The sedimentation tank 4 is divided into a buffer zone 10 and an inclined plate sedimentation zone 11 by a guide wall 9. Four layers of sampling tubes 12 are arranged at intervals from the bottom of the tank upward along the height direction of the buffer zone 10. The inlet end of each sampling tube 12 extends through the guide wall 9 into the inclined plate sedimentation zone 11, and the outlet end extends into the sampling room 7. The vertical spacing of each layer of sampling tubes 12 is 0.7m, and the vertical distance from the bottom of the sedimentation tank 4 to the bottom of the lowest layer of sampling tubes 12 is 0.5m. The horizontal spacing of each layer of sampling tubes 12 is 0.4m.

[0025] The mixing tank 2 and the flocculation tank 3 are respectively equipped with a stirring device 13, and a sludge scraper 14 is provided in the inclined plate sedimentation zone 11.

[0026] The mixing tank 2 is connected to a PAC dosing pipeline 15, and the flocculation tank 3 is connected to a PAM dosing pipeline 16.

[0027] The upper part of the inclined plate sedimentation zone 11 is provided with inclined plate packing 17.

[0028] A water collection trough 18 is provided above the inclined plate packing 17, and the outlet of the water collection trough 18 is connected to the water outlet channel 5.

[0029] The high-density sedimentation tank with sludge monitoring function is equipped with a sampling valve 19 with scale markings at the outlet end of each sampling tube 12 in the sampling chamber 7.

[0030] The specific process during work is as follows:

[0031] Water from the high-density sedimentation tank 4 enters the inlet zone 1 via pipeline. The inlet zone 1 performs preliminary flow regulation and distribution of the water to ensure the stable operation of subsequent treatment units. Subsequently, the water enters the mixing tank 2. In the mixing tank 2, the PAC dosing pipeline adds PAC coagulant quantitatively according to a preset program. At the same time, the stirring device 13 in the mixing tank 2 starts to operate at high speed, quickly and thoroughly mixing the PAC coagulant with the water, causing the suspended solids and colloidal particles in the wastewater to begin a preliminary coagulation reaction, forming some tiny flocs.

[0032] After preliminary treatment in mixing tank 2, the wastewater enters flocculation tank 3. In flocculation tank 3, PAM flocculant is added according to the set dosage via the PAM dosing pipeline. At this time, the stirring device 13 in flocculation tank 3 is adjusted to a low stirring speed to slowly stir the wastewater and PAM flocculant, allowing the long-chain molecules of PAM flocculant to fully contact and entangle with the previously formed micro-flocs. This causes the micro-flocs to collide and combine with each other, gradually forming larger, denser flocs. These larger flocs have better sedimentation performance, preparing for the subsequent sedimentation and separation process.

[0033] After the flocculation reaction is completed, the wastewater containing a large amount of flocs enters the sedimentation tank 4. The sedimentation tank 4 is divided into a buffer zone 10 and an inclined plate sedimentation zone 11 by a flow guide wall 9. The wastewater first enters the buffer zone 10, where the water flow velocity gradually decreases, which is conducive to further sedimentation of the flocs. Subsequently, the wastewater enters the inclined plate sedimentation zone 11. The inclined plate packing 17 installed in the inclined plate sedimentation zone 11 greatly increases the sedimentation area, allowing the flocs to settle more quickly onto the surface of the inclined plate packing 17 under gravity and slide down along the inclined plate packing 17 into the conical sludge hopper at the bottom of the sedimentation tank 4. Simultaneously, the sludge scraper 14 installed in the inclined plate sedimentation zone 11 continuously operates, promptly scraping the sludge at the bottom of the sedimentation tank 4 into the conical sludge hopper to prevent sludge accumulation.

[0034] During the sedimentation process, the supernatant after sedimentation and separation is located above the inclined plate packing 17 and is collected by the water collection tank 18 set above the inclined plate packing 17. The water collection tank 18 guides the collected supernatant to the effluent channel 5 and finally discharges it from the sedimentation tank 4, entering the subsequent deep treatment unit or directly discharging it after meeting the standards. At the same time, four layers of sampling tubes 12, arranged at intervals from the bottom of the tank upward along the height direction of the buffer zone 10, can collect sludge samples from different sludge layers in real time. By observing the sludge samples collected at different heights, operators can analyze the sludge sedimentation state, sludge concentration, and other information of different sludge layers and dynamically adjust the dosage of chemicals and the sludge discharge time. The sludge discharge pump 8 in the equipment room 6 is started according to the adjusted sludge discharge time interval, and the mud-water mixture accumulated in the conical sludge hopper is discharged through the pipeline to the subsequent sludge treatment unit for further treatment.

Claims

1. A high-density sedimentation tank with sludge monitoring function, characterized in that, The system includes an inlet zone (1), a mixing tank (2), a flocculation tank (3), a sedimentation tank (4), and an outlet channel (5) connected in sequence. It also includes an equipment room (6) and a sampling room (7) adjacent to the sedimentation tank (4). The sampling room (7) is located above the equipment room (6). A sludge pump (8) is installed in the equipment room (6), and the inlet of the sludge pump (8) is connected to a conical sludge hopper at the bottom of the sedimentation tank (4). The sedimentation tank (4) is divided into a buffer zone (10) and an inclined plate sedimentation zone (110) by a guide wall (9). 1) Multiple sampling tubes (12) are arranged at intervals from the bottom of the pool upward along the height direction of the buffer zone (10). The inlet end of each sampling tube (12) extends through the guide wall (9) into the inclined plate sedimentation zone (11), and the outlet end extends to the sampling chamber (7). The vertical spacing of each layer of sampling tubes (12) is 0.7-1.2m, and the vertical distance between the bottom sampling tube (12) and the bottom of the sedimentation tank (4) is more than 0.5m. The horizontal spacing of each layer of sampling tubes (12) is more than 0.4m.

2. The high-density sedimentation tank with sludge monitoring function according to claim 1, characterized in that, The mixing tank (2) and the flocculation tank (3) are respectively equipped with a stirring device (13), and a sludge scraper (14) is provided in the inclined plate sedimentation zone (11).

3. The high-density sedimentation tank with sludge monitoring function according to claim 1, characterized in that, The mixing tank (2) is connected to a PAC dosing line (15), and the flocculation tank (3) is connected to a PAM dosing line (16).

4. The high-density sedimentation tank with sludge monitoring function according to claim 1, characterized in that, The upper part of the inclined plate sedimentation zone (11) is provided with inclined plate packing (17).

5. The high-density sedimentation tank with sludge monitoring function according to claim 4, characterized in that, The inclined plate packing (17) is provided with a water collection tank (18) above it, and the outlet of the water collection tank (18) is connected to the water outlet channel (5).

6. The high-density sedimentation tank with sludge monitoring function according to claim 1, characterized in that, Each sampling tube (12) in the sampling chamber (7) is equipped with a sampling valve (19) with a scale marking at its outlet.

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