A kind of PH biregulation handles high hardness water body's precipitator

Abstract

The utility model relates to a kind of PH double-regulation processing high-hardness water body's precipitator, belong to sewage treatment technical field, including treatment pond, inlet pipe, outlet pipe, first mixing zone, second mixing zone, precipitation zone and outlet area are sequentially provided with intercommunication in treatment pond first stirring zone, second stirring zone, first mixing zone, second mixing zone, the first stirring zone and the second stirring zone are respectively connected with acidic reagent dosing system and alkaline reagent dosing system, horizontal partition is fixed in first mixing zone, water guide pipe is fixed on horizontal partition, vertical mixing cylinder is equipped in second mixing zone, the outlet of water guide pipe is equipped with the tapered flow guide disc, the lower circular array of flow guide disc has multiple distribution medicine pipe.The utility model first passes into acid liquor in first stirring zone to carry out PH regulation, then carries out PH regulation by lye in second stirring zone, acid liquor can destroy the stable state of some substances in water, improve the processing effect under alkaline condition;And flocculating agent and wastewater mixing are more uniform.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sedimentation device for treating high-hardness water with dual pH adjustment. Background Technology

[0002] Traditional sedimentation tanks adjust the pH to alkaline by adding alkaline agents when treating high-hardness water. However, some substances are stable in alkaline water, and directly adding alkaline agents to adjust the pH affects the sedimentation effect. Furthermore, when adding flocculants, they are added directly to the mixing zone, resulting in insufficient mixing between the flocculant and the water, which affects the subsequent sedimentation effect. Utility Model Content

[0003] Therefore, it is necessary to provide a sedimentation device for treating high-hardness water by adjusting the pH value, addressing the existing technical problems.

[0004] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows: A sedimentation device for treating high-hardness water with dual pH adjustment includes a treatment tank. An inlet pipe and an outlet pipe are respectively installed on opposite sides of the treatment tank. Within the treatment tank between the inlet and outlet pipes, there are sequentially connected first stirring zone, second stirring zone, first mixing zone, second mixing zone, sedimentation zone, and effluent zone. A sludge scraper is installed in the sedimentation zone. Agitators are installed in each of the first stirring zone, second stirring zone, first mixing zone, and second mixing zone. An acidic reagent dosing system and an alkaline reagent dosing system are respectively connected to the first stirring zone. A horizontal partition plate is fixed in the first mixing zone, and a water guide pipe is fixed on the horizontal partition plate. A vertical mixing cylinder is installed in the second mixing zone. The outlet of the water guide pipe is located in the lower part of the mixing cylinder, and the outlet height is lower than the inlet height. A conical guide plate is installed above the outlet of the water guide pipe, and multiple distribution pipes are arranged in a circular array below the guide plate. The agitator in the second mixing zone is located in the upper part of the mixing cylinder and is a lifting agitator. The distribution pipes are connected to a flocculant dosing system for adding chemicals to the first and second mixing zones.

[0005] The distribution tube is L-shaped, with an outlet slope at the outlet. There are four distribution tubes, and a cross-shaped delivery tube is fixed at the top of the distribution tube. The delivery tube is connected to a liquid guide tube, which is connected to the flocculant dosing system. The liquid sprayed from the distribution tube can accelerate the mixing of the liquid below the guide plate.

[0006] The lower part of the mixing cylinder is funnel-shaped, and a support column is fixed to the bottom of the mixing cylinder. The support column is fixed to the bottom of the treatment tank, which facilitates the installation and fixation of the mixing cylinder.

[0007] Both the first and second mixing zones are equipped with pH sensors, which are connected to a PLC controller. The PLC controller is connected to both the acidic and alkaline reagent dosing systems, allowing for precise adjustment of the wastewater pH value in both mixing zones.

[0008] A pipe mixer is connected to the inlet pipe, and the acid reagent dosing system is also connected to the pipe mixer to facilitate rapid mixing of acid and wastewater.

[0009] The sedimentation zone has a sludge tank at the bottom, connected to a sludge return pump and a sludge discharge pump. The sludge return pump is connected to a return pipe, the other end of which passes through a horizontal partition and extends into the first mixing zone. The top outlet of the return pipe is inclined towards the agitator in the first mixing zone. This increases the return of some sludge suspension, improving the treatment effect. Furthermore, spraying the returned sludge towards the agitator enhances mixing and prevents sludge from directly entering the water inlet pipe.

[0010] The flocculant dosing system is connected to a second liquid guide pipe. A dosing ring pipe is installed inside the upper part of the return pipe, and spray pipes are evenly fixed to the top of the dosing ring pipe. The dosing ring pipe is connected to the second liquid guide pipe. The newly added flocculant solution in the first mixing zone is first mixed with the sludge in the return pipe, and then stirred and mixed in the first mixing zone to enhance the mixing effect.

[0011] The advantages of this utility model compared with the prior art are: The system employs a two-stage pH adjustment mechanism. First, acid is introduced into the first mixing zone to adjust the pH. Then, alkaline solution is introduced into the second mixing zone to adjust the pH. The acid can disrupt the stable state of some substances in water, improving the treatment effect under alkaline conditions. Furthermore, the liquid in the first mixing zone enters the lower part of the mixing cylinder in the second mixing zone through a water guide pipe, then flows onto the guide plate for flow obstruction and distribution. After being distributed under the guide plate, it mixes with the evenly introduced flocculant, increasing the mixing effect. Finally, it is lifted to the top by the lifting agitator at the top of the mixing cylinder and overflows, increasing the residence time of the wastewater in the mixing zone and further enhancing the mixing effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Partial structural diagram; Figure 3 This is a schematic diagram of the top structure of the drug delivery tube; Figure 4 This is a schematic diagram of the top structure of the dosing ring tube; Figure 5 This is a schematic diagram of the main structure of the dosing ring; The numbers on the map are: 1. Inlet pipe; 2. Acidic agent dosing system; 3. Alkaline agent dosing system; 4. PLC controller; 5. pH sensor; 6. Agitator; 7. Flocculant dosing system; 8. Treatment tank; 9. Liquid guide pipe II; 10. Return pipe; 11. Water guide pipe; 12. Sludge return pump; 13. Sludge discharge pump; 14. Horizontal partition plate; 15. Outlet pipe; 16. Liquid guide pipe I; 17. Mixing cylinder; 18. Sludge scraper; 19. Inclined plate packing; 20. Pipe mixer; 21. Guide plate; 22. Distribution pipe; 23. Delivery pipe; 24. Spraying pipe; 25. Dosing ring pipe. Detailed Implementation

[0013] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0014] Example 1, Reference Figures 1 to 5 A sedimentation device for treating high-hardness water with dual pH adjustment includes a treatment tank 8. An inlet pipe 1 and an outlet pipe 15 are respectively installed on opposite sides of the treatment tank 8. Within the treatment tank 8 between the inlet pipe 1 and the outlet pipe 15, there are sequentially connected first stirring zone, second stirring zone, first mixing zone, second mixing zone, sedimentation zone, and effluent zone. A sludge scraper 18 is installed in the sedimentation zone. Agitators 6 are installed in the first stirring zone, second stirring zone, first mixing zone, and second mixing zone. An acidic reagent dosing system 2 and an alkaline reagent dosing system 3 are respectively connected to the first and second stirring zones. A horizontal partition plate 14 is fixed in the first mixing zone, and a water guide pipe 11 is fixed on the horizontal partition plate 14. A vertical mixing cylinder 17 is provided in the second mixing zone. The outlet of the water guide pipe 11 is located in the lower part of the mixing cylinder 17 and the outlet height is lower than the inlet height. A conical guide plate 21 is provided above the outlet of the water guide pipe 11. Multiple distribution pipes 22 are arranged in a circular array below the guide plate 21. The agitator 6 in the second mixing zone is located in the upper part of the mixing cylinder 17 and is a lifting agitator 6. The distribution pipes 22 are connected to a flocculant dosing system 7 for adding chemicals to the first mixing zone and the second mixing zone.

[0015] During operation, wastewater, after pretreatment sedimentation and filtration, enters treatment tank 8 through inlet pipe 1. It then first enters the first mixing zone, where it mixes with acid solution added by acidic agent dosing system 2 to adjust the pH to 4.5-5.5, dissolving calcium and magnesium compounds. The wastewater then enters the second mixing zone, where it mixes with alkaline solution added by alkaline agent dosing system 3 to adjust the pH to 9.0-10.5, generating carbonate and hydroxide precipitates. Finally, the wastewater enters the first mixing zone, where it mixes with the flocculant added for the first time by flocculant dosing system 7, and then passes through the guide on horizontal partition plate 14. Water pipe 11 enters the lower part of mixing cylinder 17 and then flows onto guide plate 21 for diversion and diversion, increasing the residence time. It also mixes with the flocculant added for the second time by the flocculant dosing system 7, which is evenly distributed by distribution pipe 22, below the guide plate 21, increasing the mixing effect. Then the mixed liquid flows upward from the gap between the outside of guide plate 21 and the inner wall of mixing cylinder 17, is lifted upward by the agitator 6 at the top of mixing cylinder 17, and then overflows from the top of mixing cylinder 17. The wastewater then enters the sedimentation zone for sedimentation, and the clean water enters the effluent zone from the top of the sedimentation zone and is then discharged from the effluent pipe 15.

[0016] In Example 2, based on Example 1, the distribution pipe 22 is L-shaped, with an outlet slope at its outlet. There are four distribution pipes 22, and a cross-shaped delivery pipe 23 is fixed to the top of each pipe. The delivery pipe 23 is connected to a liquid guide pipe 16, which in turn connects to the flocculant dosing system 7. When the liquid is sprayed out, it can agitate the surrounding wastewater to form a vortex, increasing the mixing effect.

[0017] The lower part of the mixing cylinder 17 is funnel-shaped, and a support column is fixed to the bottom of the mixing cylinder 17, which is fixed to the bottom of the treatment tank 8. Inclined packing 19 is provided in the upper part of the sedimentation zone. The acidic reagent dosing system 2 can add acidic reagents such as HCl, and the alkaline reagent dosing system 3 can add alkaline reagents such as NaOH. All three systems—acidic reagent dosing system 2, alkaline reagent dosing system 3, and flocculant dosing system 7—include a metering pump, which is connected to a storage tank and a dosing pipe.

[0018] Both the first and second mixing zones are equipped with pH sensors 5, which are connected to a PLC controller 4. The PLC controller 4 is connected to both the acidic reagent dosing system 2 and the alkaline reagent dosing system 3. This allows for automatic control, reducing reagent consumption by more than 20%.

[0019] A pipe mixer 20 is connected to the inlet pipe 1, and an acid reagent dosing system 2 is connected to the pipe mixer 20. The acid solution can be initially mixed with the wastewater to increase the dissolution effect of calcium and magnesium compounds.

[0020] The bottom of the sedimentation zone is equipped with a sludge tank, which is connected to a sludge return pump 12 and a sludge discharge pump 13. The sludge return pump 12 is connected to a return pipe 10, the other end of which passes through a horizontal partition plate 14 and extends into the first mixing zone. The top outlet of the return pipe 10 is inclined towards the agitator 6 in the first mixing zone. The sludge return pump 12 can extract a portion of the sludge suspension and then return it to the first mixing zone through the return pipe 10.

[0021] The flocculant dosing system 7 is connected to a liquid guide pipe 9. A dosing ring pipe 25 is installed inside the upper part of the return pipe 10. A spray pipe 24 is evenly fixed to the top of the dosing ring pipe 25. The dosing ring pipe 25 is connected to the liquid guide pipe 9. The dosing ring pipe 25 is fixed to the return pipe 10 by a support rod. The top of the spray pipe 24 has a funnel-shaped flow-limiting orifice.

[0022] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A sedimentation device for treating high-hardness water with dual pH adjustment, comprising a treatment tank (8), with an inlet pipe (1) and an outlet pipe (15) respectively arranged on opposite sides of the treatment tank (8), and the treatment tank (8) between the inlet pipe (1) and the outlet pipe (15) having a first stirring zone, a second stirring zone, a first mixing zone, a second mixing zone, a sedimentation zone and an outlet zone arranged sequentially and interconnectedly, with a sludge scraper (18) provided in the sedimentation zone, and a stirrer (6) provided in the first stirring zone, the second stirring zone, the first mixing zone and the second mixing zone, characterized in that: The first mixing zone and the second mixing zone are respectively connected to an acidic agent dosing system (2) and an alkaline agent dosing system (3). A horizontal partition plate (14) is fixed in the first mixing zone, and a water guide pipe (11) is fixed on the horizontal partition plate (14). A vertical mixing cylinder (17) is provided in the second mixing zone. The outlet of the water guide pipe (11) is located in the lower part of the mixing cylinder (17) and the outlet height is lower than the inlet height. A conical guide plate (21) is provided above the outlet of the water guide pipe (11). Multiple distribution pipes (22) are arranged in a circular array below the guide plate (21). The stirrer (6) in the second mixing zone is set in the upper part of the mixing cylinder (17) and is a lifting stirrer (6). The distribution pipes (22) are connected to a flocculant dosing system (7) that adds drugs to the first mixing zone and the second mixing zone.

2. The sedimentation device for treating high-hardness water with dual pH adjustment according to claim 1, characterized in that, The distribution tube (22) is L-shaped. The outlet of the distribution tube (22) is provided with an outlet slope. There are four distribution tubes (22). A cross-shaped delivery tube (23) is fixed at the top of the distribution tube (22). The delivery tube (23) is connected to a liquid guide tube (16). The liquid guide tube (16) is connected to the flocculant dosing system (7).

3. A sedimentation device for treating high-hardness water with dual pH adjustment according to claim 1, characterized in that, The lower part of the mixing cylinder (17) is funnel-shaped, and a support column is fixed at the bottom of the mixing cylinder (17). The support column is fixed at the bottom of the treatment tank (8).

4. A sedimentation device for treating high-hardness water with dual pH adjustment according to claim 1, characterized in that, A pH sensor (5) is installed in both the first and second mixing zones. The pH sensor (5) is connected to a PLC controller (4). The PLC controller (4) is connected to the acidic reagent dosing system (2) and the alkaline reagent dosing system (3).

5. A sedimentation device for treating high-hardness water with dual pH adjustment according to claim 1, characterized in that, A pipe mixer (20) is connected to the water inlet pipe (1), and an acidic agent dosing system (2) is connected to the pipe mixer (20).

6. A sedimentation device for treating high-hardness water with dual pH adjustment according to claim 1, characterized in that, The bottom of the sedimentation zone is provided with a sludge tank, which is connected to a sludge return pump (12) and a sludge discharge pump (13). The sludge return pump (12) is connected to a return pipe (10). The other end of the return pipe (10) passes through a horizontal partition plate (14) and extends into the first mixing zone. The top outlet of the return pipe (10) is inclined toward the agitator (6) in the first mixing zone.

7. A sedimentation device for treating high-hardness water with dual pH adjustment according to claim 6, characterized in that, The flocculant dosing system (7) is connected to the liquid guide pipe II (9), and the upper part of the return pipe (10) is provided with a dosing ring pipe (25). The top of the dosing ring pipe (25) is uniformly fixed with a spray pipe (24), and the dosing ring pipe (25) is connected to the liquid guide pipe II (9).

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