Integrated high turbidity tunnel construction wastewater three-stage purification filter device

Abstract

The utility model discloses an integrated high turbidity tunnel construction wastewater three -stage purification filter device relates to wastewater treatment technical field, including the adjustment sedimentation tank, integrated clarification system, fibre carousel filter tank and sludge pool, the adjustment sedimentation tank is used for the predeposition of wastewater, integrated clarification system and the adjustment sedimentation tank are linked, fibre carousel filter tank and integrated clarification system are connected, one end of fibre carousel filter tank and clarification tank are linked, the other end of fibre carousel filter tank is linked with the pool of reuse water and sludge pool, its advantage lies in: the device can pass through the three -stage processing flow of adjustment sedimentation, high -efficient clarification and depth filtration, can realize to tunnel construction wastewater layer -by -layer purification, provides strong guarantee for the water resource recycling of construction site, the device can realize multistage treatment to wastewater, effectively improves wastewater recovery rate, can realize multistage decontamination, miscellaneous operation to wastewater, is convenient for the popularization and the use of product.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater. Background Technology

[0002] Large amounts of wastewater are often generated during tunnel construction. Direct discharge not only pollutes the environment but also wastes water resources. Therefore, the purification and filtration of tunnel construction wastewater has received increasing attention. However, tunnel construction wastewater is characterized by high suspended solids content (SS≤3000mg / L), high turbidity, and large fluctuations in water volume. Traditional wastewater treatment methods, such as sedimentation, often result in substandard water quality after treatment and cannot effectively recycle the sludge generated.

[0003] To address this, we propose an integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of substandard wastewater treatment quality and inability to effectively recycle wastewater from sludge, and to provide an integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater, in order to overcome the defects of the prior art, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides an integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater, including an equalization sedimentation tank, an integrated clarification system, a fiber disc filter, and a sludge tank.

[0007] The regulating sedimentation tank is used for pre-sedimentation of wastewater. The regulating sedimentation tank is equipped with a wastewater lifting device and a sludge lifting device. The sludge inside the regulating sedimentation tank is transported to the sludge tank through the sludge lifting device.

[0008] The integrated clarification system is connected to the regulating sedimentation tank. The integrated clarification system includes a coagulation tank, a flocculation tank, a clarification tank, and a media return tank. The coagulation tank is connected to the regulating sedimentation tank through a wastewater lifting device.

[0009] The fiber disc filter is connected to the integrated clarification system. One end of the fiber disc filter is connected to the clarification tank, and the other end of the fiber disc filter is connected to the recycled water tank and the sludge tank.

[0010] Preferably, the regulating sedimentation tank is installed using a reinforced concrete structure and underground. A pH dosing system is provided at the regulating sedimentation tank to adjust the pH value of the wastewater inside the sedimentation tank, thereby enabling the adjustment of the pH value of the wastewater inside the sedimentation tank and laying the foundation for subsequent wastewater treatment.

[0011] Preferably, wastewater from the coagulation tank flows into the flocculation tank, and wastewater from the flocculation tank flows into the clarification tank. A central sludge hopper is provided at the bottom of the clarification tank, and sludge from the central sludge hopper is transported to the media return tank. Sludge from the bottom of the media return tank is transported to the sludge tank, and wastewater from the upper layer of the media return tank is transported to the flocculation tank. This achieves connection between the coagulation tank, flocculation tank, clarification tank, and media return tank in the integrated clarification system, ensuring the normal operation of wastewater treatment.

[0012] Preferably, a PAC dosing system is provided at the coagulation tank. The PAC dosing system removes suspended solids and colloids inside the coagulation tank through its charge neutralization, adsorption, and bridging effects, laying the foundation for removing suspended solids and colloids from the wastewater in the coagulation tank.

[0013] Preferably, the flocculation tank is equipped with an anion PAM dosing system. The PAM dosing system promotes the formation of large flocs from positively charged particles inside the flocculation tank through its adsorption and bridging effect. This facilitates the rapid formation of flocs from positively charged impurities in the wastewater, laying the foundation for the normal removal of impurities from the wastewater.

[0014] Preferably, the fiber disc filter adopts a reinforced concrete structure and is installed underground. The central tube of the fiber disc filter is made of 304 stainless steel, and the filter cloth of the fiber disc filter is made of fiber filter cloth to ensure the filtration function of the fiber disc filter and achieve the filtration treatment of wastewater.

[0015] Preferably, the sludge produced by the fiber disc filter is transferred to a sludge tank, and the water treated by the fiber disc filter is transported to a reclaimed water tank, ensuring the flow direction of the water treated by the fiber disc filter and ensuring the flow direction of the sludge from the fiber disc filter.

[0016] Preferably, a cationic PAM dosing system is installed at the sludge tank. The cationic PAM dosing system binds the tiny suspended particles and colloidal substances in the sludge tank into dense flocs through its charge neutralization and adsorption effects, thereby realizing the cationic PAM dosing to the sludge tank and laying the foundation for subsequent plate and frame dewatering of the sludge.

[0017] Preferably, the sludge tank is equipped with a plate and frame dewatering structure. The wastewater in the sludge tank after plate and frame dewatering is transported to the equalization sedimentation tank, and the sludge in the sludge tank after plate and frame dewatering is transported to the sludge shed. This ensures the destination of the concentrated sludge and wastewater after plate and frame dewatering in the sludge tank and lays the foundation for the subsequent treatment of the concentrated sludge and wastewater after plate and frame dewatering.

[0018] Preferably, the recycled water tank adopts a reinforced concrete structure and is installed underground. The recycled water tank is equipped with an overflow outlet for discharging excess water to ensure the normal use of the recycled water tank and lay the foundation for the storage of treated water.

[0019] The beneficial effects are:

[0020] This device can purify tunnel construction wastewater through a three-stage treatment process of sedimentation, high-efficiency clarification and deep filtration. The effluent quality strictly meets the construction reuse water quality standards in the "Urban Wastewater Reuse for Urban Miscellaneous Water Use" standard, providing a strong guarantee for the recycling of water resources at the construction site.

[0021] This device can perform multi-stage treatment of wastewater, effectively improve the wastewater recovery rate, and perform multi-stage decontamination and impurity removal operations on wastewater, effectively ensuring the purification quality of wastewater and facilitating the promotion and use of the product. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of the present invention.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Equalization sedimentation tank; 2. Coagulation tank; 3. Flocculation tank; 4. Clarification tank; 5. Fiber disc filter; 6. Reclaimed water tank; 7. Media return tank; 8. Sludge tank; 9. Sludge shed; 10. pH dosing system; 11. PAC dosing system; 12. Anion PAM dosing system; 13. Cation PAM dosing system. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] See Figure 1As shown, this utility model provides an integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater, including an equalization sedimentation tank 1, an integrated clarification system, a fiber disc filter 5, and a sludge tank 8. The equalization sedimentation tank 1 is used for pre-sedimentation of wastewater. The equalization sedimentation tank 1 is equipped with a wastewater lifting device and a sludge lifting device. The equalization sedimentation tank 1 is installed with a reinforced concrete structure and underground installation. A pH dosing system 10 is installed at the equalization sedimentation tank 1 to adjust the pH value of the wastewater inside the equalization sedimentation tank 1, thereby laying the foundation for subsequent wastewater treatment. The sludge inside the equalization sedimentation tank 1 is transported to the sludge tank 8 through the sludge lifting device. The integrated clarification system is connected to the equalization sedimentation tank 1. The integrated clarification system includes a coagulation tank 2, a flocculation tank 3, a clarification tank 4, and a media return tank 7. The coagulation tank 2 is connected to the equalization sedimentation tank 1 through the wastewater lifting device. The wastewater inside the coagulation tank 2 flows into the flocculation tank 3. Two PAC dosing systems 11 are installed. The PAC dosing system 11 removes suspended solids and colloids inside the coagulation tank 2 through its charge neutralization, adsorption and bridging effect, laying the foundation for the removal of suspended solids and colloids in the wastewater in the coagulation tank 2. The wastewater inside the flocculation tank 3 flows into the clarification tank 4. The flocculation tank 3 is equipped with an anion PAM dosing system 12. The PAM dosing system 12 promotes the formation of large flocs of positively charged particles inside the flocculation tank 3 through its adsorption and bridging effect, which facilitates the rapid formation of flocs of positively charged impurities in the wastewater in the flocculation tank 3, laying the foundation for the normal removal of impurities from the wastewater. The bottom of the clarification tank 4 is equipped with a central sludge hopper. The sludge inside the central sludge hopper is transported to the media return tank 7. The sludge at the bottom of the media return tank 7 is transported to the sludge tank 8. The wastewater on the upper layer of the media return tank 7 is transported to the flocculation tank 3. This realizes the connection between the treatment structures of the coagulation tank 2, flocculation tank 3, clarification tank 4 and media return tank 7 in the integrated clarification system, ensuring the normal operation of wastewater treatment.The fiber disc filter 5 is connected to the integrated clarification system. The fiber disc filter 5 adopts a reinforced concrete structure and is installed underground. The central pipe of the fiber disc filter 5 is made of 304 stainless steel. The filter cloth of the fiber disc filter 5 is made of fiber filter cloth to ensure its filtration function and achieve wastewater filtration treatment. One end of the fiber disc filter 5 is connected to the clarification tank 4, and the other end is connected to the reclaimed water tank 6 and the sludge tank 8. The sludge produced by the fiber disc filter 5 is transferred to the sludge tank 8, and the treated water is transported to the reclaimed water tank 6. A cationic PAM dosing system 13 is installed in the sludge tank 8. The cationic PAM dosing system 13 binds the tiny suspended particles and colloidal substances in the sludge tank 8 into dense flocs through charge neutralization and adsorption, realizing cationic PAM dosing to the sludge tank 8, thus treating the sludge. The subsequent plate and frame dewatering lays the foundation. Plate and frame dewatering structures are installed in sludge tank 8. Wastewater from sludge tank 8 after plate and frame dewatering is transported to equalization sedimentation tank 1, and sludge from sludge tank 8 after plate and frame dewatering is transported to sludge shed 9. This ensures the destination of the concentrated sludge and wastewater after plate and frame dewatering in sludge tank 8, laying the foundation for subsequent treatment of the concentrated sludge and wastewater. The recycled water tank 6 adopts a reinforced concrete structure and is buried underground. The recycled water tank 6 is equipped with an overflow outlet for discharging excess water, ensuring its normal use and laying the foundation for the storage of treated water. This also ensures the flow direction of treated water and sludge from the fiber disc filter 5.

[0028] Working principle: The regulating sedimentation tank 1 can be used as the pretreatment unit of the entire three-stage wastewater purification and filtration device. The regulating sedimentation tank 1 adopts a reinforced concrete structure and is installed underground. It can temporarily store and pre-sediment the tunnel sewage, remove a large amount of easily settled stone powder and silt, and reduce the transportation load of the subsequent treatment structure. It can be equipped with a sludge lifting device to transport the sludge in the sludge hopper to the sludge tank 8. It is also equipped with a wastewater lifting device to lift the wastewater in the regulating sedimentation tank 1 to the integrated clarification system. At the same time, the pH dosing system 10 next to the regulating sedimentation tank 1 can add pH adjusting agents to the regulating sedimentation tank 1 to adjust the pH of the regulating sedimentation tank 1, which is convenient for subsequent wastewater treatment.

[0029] Wastewater enters the integrated clarification system's coagulation tank 2. First, it enters coagulation tank 2, where PAC dosing system 11, located next to it, continuously adds PAC. The adsorption and bridging effect of PAC promotes the formation of large flocs from positively charged particles within the flocculation tank 3, thus removing most of the suspended solids and reducing the turbidity of the wastewater. Then, the wastewater from coagulation tank 2 flows into flocculation tank 3, where anion exchange PAM dosing system 12, located next to it, adds PAC. Adding anionic PAM allows the flocs to form larger flocs through adsorption, charge neutralization, and bridging. The wastewater then flows into clarifier 4, where the coagulated flocs settle into the central sludge hopper at the bottom. The sludge in the central sludge hopper is then pumped to media reaction tank 7. The sludge reacts in media reaction tank 7, which accelerates sludge concentration. The preliminarily concentrated sludge is then pumped to sludge tank 8, while the wastewater above media reaction tank 7 flows back into flocculation tank 3 for further wastewater treatment.

[0030] During this process, the wastewater from the upper layer of clarifier 4 flows into the fiber disc filter 5. The fiber disc filter 5 achieves deep filtration of the wastewater treated by the integrated clarification system, reducing suspended solids and turbidity, thus ultimately purifying the water. The water deeply filtered by the fiber disc filter 5 can then be stored and reused in the recycled water tank 6. The recycled water tank 6 is a reinforced concrete structure, buried underground, which can temporarily store the treated water for reuse in production; excess water is discharged. Similarly, the sludge generated in the fiber disc filter 5 is transported to the sludge tank 8, which is also a reinforced concrete structure, buried underground. The sludge is discharged from the temporary equalization sedimentation tank 1, the integrated clarification system, and the filter device in the fiber disc filter 5. After mixing, the sludge is dewatered by plate and frame dewatering. The sludge produced by plate and frame dewatering can be transported to the sludge shed 9 for centralized treatment, while the wastewater produced by plate and frame dewatering is transported to the equalization sedimentation tank 1 for further treatment. A cationic PAM dosing system 13 is set up next to the sludge tank 8. Cationic PAM can be added to the sludge tank 8 through the cationic PAM dosing system 13. The cationic PAM can bind the tiny suspended particles and colloidal substances in the sludge tank 8 into dense flocs, which facilitates the plate and frame dewatering operation of the sludge.

[0031] Finally, the device can perform primary wastewater purification and filtration operations, sequentially passing wastewater through equalization sedimentation tank 1, coagulation tank 2, flocculation tank 3, clarification tank 4, fiber disc filter 5, and reclaimed water tank 6; it can also perform secondary wastewater treatment operations, sequentially passing wastewater through equalization sedimentation tank 1, coagulation tank 2, flocculation tank 3, clarification tank 4, media return tank 7, clarification tank 4, fiber disc filter 5, and reclaimed water tank 6; and it can also perform tertiary wastewater treatment operations, sequentially passing wastewater through equalization sedimentation tank 1, coagulation tank 2, flocculation tank 3, clarification tank 4, media return tank 7, sludge tank 8, sedimentation tank 1, coagulation tank 2, flocculation tank 3, clarification tank 4, fiber disc filter 5, and reclaimed water tank 6. In this process, multi-stage impurity removal of wastewater can also be achieved.

[0032] The above are merely specific embodiments 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. An integrated three-stage purification and filtration device for high-turbidity tunnel construction wastewater, characterized in that: It comprises a regulating sedimentation tank (1), an integrated clarification system, a fiber rotating disc filter tank (5) and a sludge tank (8); The regulating sedimentation tank (1) is used for pre-deposition of wastewater, and is provided with a wastewater lifting device and a sludge lifting device; the sludge in the regulating sedimentation tank (1) is transported to the sludge tank (8) through the sludge lifting device; The integrated clarification system is connected with the regulating sedimentation tank (1), and comprises a coagulation tank (2), a flocculation tank (3), a clarification tank (4) and a medium reflux tank (7); the coagulation tank (2) is connected with the regulating sedimentation tank (1) through the wastewater lifting device; The fiber rotating disc filter tank (5) is connected with the integrated clarification system, one end of the fiber rotating disc filter tank (5) is connected with the clarification tank (4), and the other end of the fiber rotating disc filter tank (5) is connected with a reused water tank (6) and the sludge tank (8).

2. The integrated high turbidity tunnel construction wastewater three-stage purification filter device according to claim 1, characterized in that: The regulating sedimentation tank (1) is installed in a steel-concrete structure and in a buried mode, and is provided with a PH dosing system (10) for adjusting the PH value of wastewater in the regulating sedimentation tank (1).

3. The integrated high turbidity wastewater three-stage purification filter device for tunnel construction according to claim 1, characterized in that: Wastewater in the coagulation tank (2) flows into the flocculation tank (3), wastewater in the flocculation tank (3) flows into the clarification tank (4), the bottom end of the clarification tank (4) is provided with a central hopper, sludge in the central hopper is transported to the medium reflux tank (7), sludge at the bottom of the medium reflux tank (7) is transported to the sludge tank (8), and wastewater in the upper layer of the medium reflux tank (7) is transported to the flocculation tank (3).

4. The integrated high-turbidity tunnel construction wastewater three-stage purification filter device according to claim 3, characterized in that: The coagulation tank (2) is provided with a PAC dosing system (11), which removes suspended solids and colloids in the coagulation tank (2) through charge neutralization and adsorption bridging.

5. The integrated three-stage purification filter device for high-turbidity wastewater in tunnel construction according to claim 3, characterized in that: The flocculation tank (3) is provided with a negative PAM dosing system (12), which promotes the formation of large flocs of particles with positive charges in the flocculation tank (3) through adsorption bridging.

6. The integrated three-stage purification filter device for high-turbidity wastewater in tunnel construction according to claim 1, characterized in that: The fiber rotating disc filter tank (5) is installed in a steel-concrete structure and in a buried mode, the central pipe of the fiber rotating disc filter tank (5) is made of 304 stainless steel, and the filter cloth of the fiber rotating disc filter tank (5) is made of fiber filter cloth.

7. The integrated three-stage purification filter device for high-turbidity wastewater in tunnel construction according to claim 1, characterized in that: Sludge generated by the treatment of the fiber rotating disc filter tank (5) is transported to the sludge tank (8), and water treated by the fiber rotating disc filter tank (5) is transported to the reused water tank (6).

8. The integrated three-stage purification filter device for high-turbidity wastewater in tunnel construction according to claim 7, characterized in that: The sludge tank (8) is provided with a positive PAM dosing system (13), which connects small suspended particles and colloidal substances in the sludge tank (8) into dense flocs through charge neutralization and adsorption.

9. The integrated high turbidity wastewater three-stage purification filter device for tunnel construction according to claim 8, characterized in that: The sludge tank (8) is provided with a plate-frame dewatering structure, wastewater in the sludge tank (8) after plate-frame dewatering is transported to the regulating sedimentation tank (1), and sludge in the sludge tank (8) after plate-frame dewatering is transported to a sludge shed (9).

10. The integrated three-stage purification filter device for high-turbidity wastewater in tunnel construction according to claim 7, characterized in that: The reused water tank (6) is installed in a steel-concrete structure and in a buried mode, and is provided with an overflow for discharging excess water.

Images