High-efficiency multistage defluorination device for industrial wastewater

Abstract

The utility model relates to an efficient multistage defluorination device for industrial wastewater, and belongs to the technical field of industrial wastewater treatment, the efficient multistage defluorination device comprises a coagulative precipitation system, a first mixed reaction system, a first precipitation tank, a second mixed reaction system and a second precipitation tank are arranged in the coagulative precipitation system, and the water inlet end of the coagulative precipitation system is communicated with the first mixed reaction system; the water outlet end of the first mixed reaction system is communicated with the water inlet end of the first sedimentation tank, the water outlet end of the first sedimentation tank is communicated with the water inlet end of the second mixed reaction system, the water outlet end of the second mixed reaction system is communicated with the water inlet end of the second sedimentation tank, and the size of the first sedimentation tank is smaller than that of the second sedimentation tank; the water outlet end of the coagulating sedimentation system is communicated with the second sedimentation tank. The defluorination device has the effects of improving the medication efficiency and reducing the occupied space of the defluorination device.

Description

Technical Field

[0001] The present application relates to the technical field of industrial wastewater treatment, and in particular to a high-efficiency multi-stage defluorination device for industrial wastewater. Background Art

[0002] Fluoride removal is a critical step in modern industrial wastewater treatment. Excessive fluoride concentrations not only severely harm the ecological environment but also threaten human health. Therefore, fluoride ions in wastewater must be effectively removed to meet stringent discharge standards.

[0003] Due to the high fluoride concentration in wastewater during treatment, the reaction time and conditions in traditional single treatment systems are limited, making it difficult for the chemical reaction to reach the optimal state. The reaction between the defluoridation agent and fluoride ions may be incomplete, resulting in low agent utilization efficiency and the need to increase the agent dosage.

[0004] Therefore, the industry has proposed an improvement plan of using multiple sets of sedimentation devices in parallel. The design of multiple sets of devices helps to improve the overall processing capacity of the system. However, the multiple sets of sedimentation devices in the existing technology are usually just simple parallel connection of multiple standard sedimentation tanks, which takes up a lot of space. Utility Model Content

[0005] In order to improve the efficiency of drug use and reduce the space occupied by the defluorination device, the present application provides a high-efficiency multi-stage defluorination device for industrial wastewater.

[0006] The present application provides an efficient multi-stage defluorination device for industrial wastewater using the following technical solutions:

[0007] A high-efficiency multi-stage defluorination device for industrial wastewater includes a coagulation and sedimentation system. A first mixing reaction system, a first sedimentation tank, a second mixing reaction system and a second sedimentation tank are provided in the coagulation and sedimentation system. The water inlet of the coagulation and sedimentation system is connected to the first mixing reaction system, the water outlet of the first mixing reaction system is connected to the water inlet of the first sedimentation tank, the water outlet of the first sedimentation tank is connected to the water inlet of the second mixing reaction system, the water outlet of the second mixing reaction system is connected to the water inlet of the second sedimentation tank, the size of the first sedimentation tank is smaller than that of the second sedimentation tank, and the water outlet of the coagulation and sedimentation system is connected to the second sedimentation tank.

[0008] By adopting the above technical solution, the wastewater first passes through the first mixed reaction system for flocculation, then flows to the first sedimentation tank for sedimentation, then passes through the second mixed reaction system for flocculation, then flows to the second sedimentation tank for sedimentation, and finally is discharged from the second sedimentation tank to complete the filtration.

[0009] Since the first sedimentation tank is small in size, it plays a role of pre-precipitation, quickly precipitating large particles or heavy sediments. At the same time, some precipitated particles enter the second mixed reaction system and utilize the principle of "seed effect" to promote the rapid condensation into larger particles in the second mixed reaction system, which helps to accelerate the reaction and improve the precipitation efficiency. The two-stage precipitation setting also ensures that the defluoridating agent and the wastewater have sufficient chemical reaction time, thereby improving the efficiency of the drug use. At the same time, since the first sedimentation tank is smaller than the standard sedimentation tank size and all systems are integrated in a coagulation and sedimentation system, the space occupied by the defluoridation device is greatly reduced.

[0010] Optionally, the first mixed reaction system includes a first defluorinating agent mixing tank, a first regulating mixing tank and a first reaction tank, the first defluorinating agent mixing tank is connected to the water inlet of the coagulation and sedimentation system, the water outlet of the first defluorinating agent mixing tank is connected to the water inlet of the first regulating mixing tank, the water outlet of the first regulating mixing tank is connected to the water inlet of the first reaction tank, and the water outlet of the first reaction tank is connected to the water inlet of the first sedimentation tank;

[0011] The second mixed reaction system includes a second defluorinating agent mixing tank, a second regulating mixing tank and a second reaction tank. The second defluorinating agent mixing tank is connected to the water outlet of the first sedimentation tank, the water outlet of the second defluorinating agent mixing tank is connected to the water inlet of the second regulating mixing tank, the water outlet of the second regulating mixing tank is connected to the water inlet of the second reaction tank, and the water outlet of the second reaction tank is connected to the water inlet of the second sedimentation tank.

[0012] By adopting the above technical solution, the wastewater enters the first defluoridation agent mixing tank, the defluoridation agent contacts the fluoride ions in the water and begins to react initially, prompting the fluoride to react with the defluoridation agent to form a preliminary precipitation precursor;

[0013] The wastewater then flows into the first regulating and mixing tank, where the defluoridation agent and fluoride react more completely, promoting defluoridation and improving sedimentation efficiency. Then, in the first reaction tank, sufficient reaction and better mixing occur, forming stable, larger sediment particles. The wastewater is then discharged into the first sedimentation tank for pre-precipitation. The wastewater then passes through the second defluoridation agent mixing tank, the second regulating and mixing tank, and the second reaction tank for reaction and purification, before finally being discharged from the second sedimentation tank after complete sedimentation. This not only fully defluorinates the wastewater, but also integrates multiple tanks into the coagulation and sedimentation system, unlike traditional single tanks connected sequentially, reducing the space occupied by the defluoridation equipment.

[0014] Optionally, the coagulation and sedimentation system is divided into the first defluoridating agent mixing tank, the first regulating mixing tank, the first reaction tank, the first sedimentation tank, the second defluoridating agent mixing tank, the second regulating mixing tank, the second reaction tank and the second sedimentation tank by multiple partitions.

[0015] By adopting the above technical solution, partitions are used to quickly form multiple pools, which facilitates production and fully utilizes the space of the coagulation and sedimentation system, which is conducive to increasing the processing capacity.

[0016] Optionally, a mixing barrel and a first stirrer are provided in both the first reaction tank and the second reaction tank, and the first stirrer is located in the mixing barrel.

[0017] By adopting the above technical solution, the function of the mixing barrel is to guide the liquid flow from the first regulating mixing tank into the first reaction tank and the liquid flow from the second regulating mixing tank into the second reaction tank, so that after entering the first reaction tank and the second reaction tank, the liquid flow passes through the area of the mixing barrel, is concentrated, and cooperates with the first mixer to ensure that the wastewater entering the first reaction tank and the second reaction is fully mixed with the reactants in the mixing barrel, thereby promoting the uniformity of the reaction and improving the precipitation effect.

[0018] Optionally, a second mixer is provided in each of the first defluorinating agent mixing tank, the first regulating mixing tank, the second defluorinating agent mixing tank and the second regulating mixing tank.

[0019] By adopting the above technical solution, the second mixer can play the role of evenly distributing the defluorination agent and the alkali solution, thereby ensuring the high efficiency and reliability of the entire defluorination process.

[0020] Optionally, auxiliary sedimentation inclined plates are provided in both the first sedimentation tank and the second sedimentation tank.

[0021] By adopting this technical solution, the inclined arrangement of the auxiliary sedimentation inclined plates significantly increases the effective settling area of the first and second sedimentation tanks. This increased settling area allows more suspended solids to come into contact with the inclined plates and settle on their surfaces, thereby accelerating the sedimentation process.

[0022] Optionally, a baffle is provided in the second sedimentation tank.

[0023] By adopting the above technical solution, the baffle plays a role in buffering the water flow, prolonging the residence time of the water in the second sedimentation tank, ensuring that suspended matter has sufficient time to settle, thereby improving the overall treatment efficiency.

[0024] Optionally, a water collecting weir is provided at the water outlet of the second sedimentation tank.

[0025] By adopting the above technical solution, the upper layer of clean water on the pool surface is slowly and evenly collected through the water collection trough in the water collection weir, which can reduce the disturbance of the settled sludge layer in the second sedimentation tank, maintain the stability of the sediment in the second sedimentation tank, and prevent suspended solids from entering the clean water again.

[0026] Optionally, a flow detection component is provided at the water inlet of the first defluoridating agent mixing tank, a fluoride ion detection component is provided at the water inlet of the first defluoridating agent mixing tank and the water outlet of the second sedimentation tank, the first reaction tank and the second reaction tank are both provided with a pH detection component, and the first sedimentation tank and the second sedimentation tank are both provided with a sludge interface meter.

[0027] By adopting the above technical solution, the flow detection component, fluoride ion detection component, and pH value detection component are used to detect water inflow, and the pH value is tested twice in the subsequent operation process to calculate the amount of defluoridating agent and alkali solution used, thereby reducing the waste of raw materials. At the same time, the sludge interface meter is used to monitor the sludge accumulation in the sedimentation tank, optimize the sludge discharge operation, improve the efficiency of the sedimentation tank, and protect the equipment to ensure that it operates in the best condition.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. Due to the small size of the first sedimentation tank, it plays a role of pre-precipitation, quickly precipitating large particles or heavy sediments. At the same time, some precipitated particles enter the second mixed reaction system. Utilizing the principle of "seed effect", they are promoted to quickly condense into larger particles in the second mixed reaction system, which helps to accelerate the reaction and improve the precipitation efficiency. The two-stage precipitation setting also ensures that the defluoridating agent and wastewater have sufficient chemical reaction time, thereby improving the drug application efficiency. At the same time, because the first sedimentation tank is smaller than the standard sedimentation tank size and all systems are integrated in a coagulation and sedimentation system, the space occupied by the defluoridation device is greatly reduced;

[0030] 2. Multiple tanks are integrated into the coagulation and sedimentation system, unlike the traditional single tanks that are connected in sequence, which reduces the space occupied by the defluorination equipment;

[0031] 3. The function of the mixing barrel is to guide the liquid flow from the first regulating mixing tank into the first reaction tank and the liquid flow from the second regulating mixing tank into the second reaction tank, so that after entering the first reaction tank and the second reaction tank, the liquid flow passes through the area of the mixing barrel, concentrates the liquid flow, and cooperates with the first mixer to ensure that the wastewater entering the first reaction tank and the second reaction is fully mixed with the reactants in the mixing barrel, promotes the uniformity of the reaction, and thus improves the precipitation effect;

[0032] 4. The flow detection component, fluoride ion detection component, and pH value detection component are used to detect water inlet, and the pH value is tested twice in the subsequent operation process to calculate the amount of defluoridating agent and alkali solution to reduce the waste of raw materials. At the same time, the sludge interface meter is used to monitor the sludge accumulation in the sedimentation tank, optimize the sludge discharge operation, improve the efficiency of the sedimentation tank, and protect the equipment to ensure that it operates in the best condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0034] Figure 2 It is a structural schematic diagram of an embodiment of the present application used to reflect the auxiliary sedimentation slope, mixing barrel and water collection weir.

[0035] Explanation of the accompanying symbols: 1. Coagulation and sedimentation system; 11. Flow detection component; 12. pH detection component; 13. Fluoride ion detection component; 14. Sludge interface meter; 2. First mixing reaction system; 21. First defluoridant mixing tank; 22. First regulating mixing tank; 23. First reaction tank; 3. First sedimentation tank; 4. Second mixing reaction system; 41. Second defluoridant mixing tank; 42. Second regulating mixing tank; 43. Second reaction tank; 5. Second sedimentation tank; 51. Baffle; 52. Weir; 6. Mixing barrel; 61. First mixer; 7. Second mixer; 8. Auxiliary sedimentation inclined plate. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-2 This application is described in further detail.

[0037] The embodiments of the present application disclose a high-efficiency multi-stage defluorination device for industrial wastewater.

[0038] like Figure 1 and Figure 2 The high-efficiency multi-stage defluorination device for industrial wastewater includes a coagulation and sedimentation system 1, which is a rectangular box. The coagulation and sedimentation system 1 is separated into a first mixed reaction system 2, a first sedimentation tank 3, a second mixed reaction system 4, and a second sedimentation tank 5 by a number of partitions. The first mixed reaction system 2 includes a first defluoridating agent mixing tank 21, a first regulating mixing tank 22, and a first reaction tank 23. The second mixed reaction system 4 includes a second defluoridating agent mixing tank 41, a second regulating mixing tank 42, and a second reaction tank 43. The first defluoridating agent mixing tank 21, the first regulating mixing tank 22, the first reaction tank 23, the second defluoridating agent mixing tank 41, the second regulating mixing tank 42, and the second reaction tank 43 are all rectangular tanks. The volume of the first sedimentation tank 3 is 2 / 5 of the volume of the second sedimentation tank 5.

[0039] The length of the pool body formed by splicing the first defluorinating agent mixing tank 21 and the first regulating mixing tank 22 is the same as the length of the first reaction tank 23, and the length of the pool body formed by splicing the first reaction tank 23 and the first regulating mixing tank 22 is the same as the length of the pool body of the first sedimentation tank 3. The first defluorinating agent mixing tank 21 is connected to the water inlet of the coagulation and sedimentation system 1, and the water outlet end of the first defluorinating agent mixing tank 21 is connected to the water inlet end of the first regulating mixing tank 22. A mixing barrel 6 is installed at the center of the first reaction tank 23, and the bottom of the mixing barrel 6 is connected to the water outlet end of the first regulating mixing tank 22, and the water outlet end of the first reaction tank 23 is connected to the water inlet end of the first sedimentation tank 3. A first mixer 61 is installed in the first reaction tank 23, and the first mixer 61 is located in the mixing barrel 6. A second mixer 7 is installed in both the first defluorinating agent mixing tank 21 and the first regulating mixing tank 22. An auxiliary sedimentation inclined plate 8 is installed in the first sedimentation tank 3, and the bottom of the first sedimentation tank 3 protrudes downward.

[0040] The length of the pool body formed by splicing the second defluorinating agent mixing tank 41 and the second regulating mixing tank 42 is the same as the length of the second reaction tank 43, and the length of the pool body formed by splicing the second reaction tank 43 and the second regulating mixing tank 42 is the same as the length of the pool body of the second sedimentation tank 5. The water outlet of the first sedimentation tank 3 is connected to the water inlet of the second defluorinating agent mixing tank 41, and the water outlet of the second defluorinating agent mixing tank 41 is connected to the water inlet of the second regulating mixing tank 42. A mixing barrel 6 is installed at the center of the second reaction tank 43, and the bottom of the mixing barrel 6 is connected to the water outlet of the second regulating mixing tank 42, and the water outlet of the second reaction tank 43 is connected to the water inlet of the second sedimentation tank 5. A first mixer 61 is installed in the second reaction tank 43, and the first mixer 61 is located in the mixing barrel 6. A second mixer 7 is installed in both the second defluorinating agent mixing tank 41 and the second regulating mixing tank 42. A baffle 51 is installed at the water inlet end of the second sedimentation tank 5, and an auxiliary sedimentation inclined plate 8 is installed in the second sedimentation tank 5. The bottom of the second sedimentation tank 5 protrudes downward, and a water collecting weir 52 is installed on the top of the second sedimentation tank 5. The water collecting weir 52 is connected to the water outlet end of the coagulation sedimentation system 1.

[0041] A flow detection component 11, a pH detection component 12 and a fluoride ion detection component 13 are installed at the water inlet of the first defluoridating agent mixing tank 21, a fluoride ion detection component 13 is installed at the water outlet of the second sedimentation tank 5, a pH detection component 12 is installed in both the first reaction tank 23 and the second reaction tank 43, and a sludge interface meter 14 is installed in both the first sedimentation tank 3 and the second sedimentation tank 5.

[0042] The wastewater enters the first defluoridation agent mixing tank 21, where the defluoridation agent contacts the fluoride ions in the water and begins to react initially, causing the fluoride to react with the defluoridation agent to form a preliminary precipitation precursor.

[0043] The wastewater then flows into the first regulating mixing tank 22 to make the reaction between the defluoridating agent and the fluoride more complete, promote the defluoridation reaction and improve the precipitation efficiency. Then, it undergoes sufficient reaction and better mixing in the mixing barrel 6 of the first reaction tank 23, and forms stable and larger precipitation particles in the first reaction tank 23. It is then discharged into the first sedimentation tank 3 for pre-precipitation. Then, the wastewater passes through the second defluoridating agent mixing tank 41, the second regulating mixing tank 42 and the second reaction tank 43 in sequence for reaction purification, and is finally discharged after complete precipitation in the second sedimentation tank 5 to complete filtration.

[0044] Since the first sedimentation tank 3 is relatively small in size, it plays a role of pre-precipitation, quickly precipitating large particles or heavy sediments. At the same time, some of the precipitated particles enter the second mixed reaction system 4, and the principle of "seed effect" is used to promote the rapid condensation into larger particles in the second mixed reaction system 4, which helps to accelerate the reaction and improve the precipitation efficiency. The two-stage precipitation setting also ensures that the defluoridating agent and the wastewater have sufficient chemical reaction time, thereby improving the drug use efficiency. At the same time, since the first sedimentation tank 3 is smaller than the standard sedimentation tank size, and multiple tank bodies are integrated in the coagulation sedimentation system 1, the partition is used to quickly form multiple tank bodies for partitioning, which is convenient for production and makes full use of the space of the coagulation sedimentation system 1, which is conducive to increasing the processing capacity. Unlike traditional single tank bodies connected in sequence, the space occupied by the defluoridation equipment is reduced;

[0045] At the same time, the flow detection component 11, the fluoride ion detection component 13, and the pH detection component 12 perform water inlet detection, and detect the pH value twice in the subsequent operation process to calculate the amount of defluoridating agent and alkali solution used to reduce the waste of raw materials. At the same time, the sludge interface meter 14 is used to monitor the sludge accumulation in the sedimentation tank, optimize the sludge discharge operation, improve the efficiency of the sedimentation tank, and protect the equipment to ensure that it operates in the best condition.

[0046] The implementation principle of the embodiment of the present application is as follows: since the size of the first sedimentation tank 3 is small, it plays a role of pre-precipitation, quickly precipitating large particles or heavy sediments, and at the same time, some of the precipitated particles enter the second mixed reaction system 4, and utilize the principle of "seed effect" to promote rapid condensation into larger particles in the second mixed reaction system 4, which helps to accelerate the reaction and improve the precipitation efficiency. The two-stage precipitation setting also ensures that the defluoridating agent and the wastewater have sufficient chemical reaction time, thereby improving the drug use efficiency. At the same time, since the first sedimentation tank 3 is smaller than the standard sedimentation tank size and all systems are integrated in a coagulation and sedimentation system 1, the space occupied by the defluoridation device is greatly reduced.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An efficient multi-stage defluorination device for industrial wastewater, characterized by: The invention comprises a coagulation and sedimentation system (1), wherein a first mixed reaction system (2), a first sedimentation tank (3), a second mixed reaction system (4) and a second sedimentation tank (5) are arranged in the coagulation and sedimentation system (1), the water inlet end of the coagulation and sedimentation system (1) is connected to the first mixed reaction system (2), the water outlet end of the first mixed reaction system (2) is connected to the water inlet end of the first sedimentation tank (3), the water outlet end of the first sedimentation tank (3) is connected to the water inlet end of the second mixed reaction system (4), the water outlet end of the second mixed reaction system (4) is connected to the water inlet end of the second sedimentation tank (5), the size of the first sedimentation tank (3) is smaller than the size of the second sedimentation tank (5), and the water outlet end of the coagulation and sedimentation system (1) is connected to the second sedimentation tank (5).

2. The high-efficiency multi-stage defluorination device for industrial wastewater according to claim 1, characterized in that: The first mixed reaction system (2) comprises a first defluorinating agent mixing tank (21), a first regulating mixing tank (22) and a first reaction tank (23), wherein the first defluorinating agent mixing tank (21) is connected to the water inlet of the coagulation and sedimentation system (1), the water outlet of the first defluorinating agent mixing tank (21) is connected to the water inlet of the first regulating mixing tank (22), the water outlet of the first regulating mixing tank (22) is connected to the water inlet of the first reaction tank (23), and the water outlet of the first reaction tank (23) is connected to the water inlet of the first sedimentation tank (3); The second mixed reaction system (4) comprises a second defluorinating agent mixing tank (41), a second regulating mixing tank (42) and a second reaction tank (43), wherein the second defluorinating agent mixing tank (41) is connected to the water outlet of the first sedimentation tank (3), the water outlet of the second defluorinating agent mixing tank (41) is connected to the water inlet of the second regulating mixing tank (42), the water outlet of the second regulating mixing tank (42) is connected to the water inlet of the second reaction tank (43), and the water outlet of the second reaction tank (43) is connected to the water inlet of the second sedimentation tank (5).

3. The high-efficiency multi-stage defluorination device for industrial wastewater according to claim 2, characterized in that: The coagulation and sedimentation system (1) is divided into the first defluorination agent mixing tank (21), the first regulating mixing tank (22), the first reaction tank (23), the first sedimentation tank (3), the second defluorination agent mixing tank (41), the second regulating mixing tank (42), the second reaction tank (43) and the second sedimentation tank (5) by a plurality of partitions.

4. The high-efficiency multi-stage defluorination device for industrial wastewater according to claim 2, characterized in that: A mixing barrel (6) and a first stirrer (61) are provided in both the first reaction tank (23) and the second reaction tank (43), and the first stirrer (61) is located in the mixing barrel (6).

5. The high-efficiency multi-stage defluorination device for industrial wastewater according to claim 2, characterized in that: A second mixer (7) is provided in each of the first defluorinating agent mixing tank (21), the first regulating mixing tank (22), the second defluorinating agent mixing tank (41), and the second regulating mixing tank (42).

6. The high-efficiency multi-stage defluorination device for industrial wastewater according to any one of claims 1 to 5, characterized in that: Auxiliary sedimentation inclined plates (8) are provided in both the first sedimentation tank (3) and the second sedimentation tank (5).

7. The high-efficiency multi-stage defluorination device for industrial wastewater according to any one of claims 1 to 5, characterized in that: A baffle (51) is provided in the second sedimentation tank (5).

8. The high-efficiency multi-stage defluorination device for industrial wastewater according to any one of claims 1 to 5, characterized in that: A water collecting weir (52) is provided at the water outlet of the second sedimentation tank (5).

9. The high-efficiency multi-stage defluorination device for industrial wastewater according to any one of claims 2 to 5, characterized in that: A flow detection component (11) is provided at the water inlet of the first defluorinating agent mixing tank (21), a fluoride ion detection component (13) is provided at the water inlet of the first defluorinating agent mixing tank (21) and the water outlet of the second sedimentation tank (5), the first reaction tank (23) and the second reaction tank (43) are both provided with a pH detection component (12), and the first sedimentation tank (3) and the second sedimentation tank (5) are both provided with a sludge interface meter (14).

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