Fluorine-containing wastewater treatment system
By designing a fluorine-containing wastewater treatment system containing lime addition and fluorine-depleting agent, the problem of high cost and poor effect of fluorine-containing wastewater treatment in the prior art is solved, online treatment and efficient fluorine removal are achieved, pollution is reduced and wastewater quality is ensured.
Patent Information
- Application Number
- CN202422028718.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The prior art relies on large sewage treatment stations when treating fluorine-containing wastewater, resulting in the concentration of fluorine wastewater being diluted and the fluorine-depleting agent being diluted, resulting in high treatment costs and poor results. At the same time, the treatment volume of the sewage treatment station is limited, resulting in on-site accumulation.
A fluorine-containing wastewater treatment system is designed, including a first reaction device and a second reaction device. Through the addition of lime and the use of defluorinated fluoride, two reactions are realized, and the wastewater meets the standards through filtration and pH adjustment.
Online treatment is realized, which avoids wastewater handling and on-site accumulation, improves treatment effect, reduces pollution, and ensures the quality of wastewater discharged from the outside.
Smart Images
Figure CN222989968U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wastewater treatment, in particular to a treatment system for fluoride-containing wastewater. Background Art
[0002] As the country attaches more and more importance to water resources, all walks of life have become stricter with the treatment of wastewater generated in industrial production. The fluoride concentration in water directly affects the human living environment.
[0003] At present, the treatment of fluoride-containing wastewater relies on large sewage treatment stations. Enterprises collect fluoride-containing wastewater in barrels and then transport it to the sewage treatment station. Since the sewage treatment station treats the production wastewater as a whole without separately distinguishing the wastewater containing fluoride ions, the concentration of fluoride wastewater is diluted, while the defluorinating agent is added according to the original concentration, resulting in the dilution of the defluorinating agent as well, causing high treatment costs and poor treatment effects. At the same time, the daily treatment capacity of the sewage treatment station is limited, leading to on-site accumulation.
[0004] Therefore, there is an urgent need for a treatment system for fluoride-containing wastewater to solve the above technical problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a treatment system for fluoride-containing wastewater, which can achieve on-line treatment, avoid wastewater transportation, prevent on-site accumulation, improve treatment effect and reduce pollution.
[0006] To achieve the above object, the utility model adopts the following technical solutions:
[0007] A treatment system for fluoride-containing wastewater, comprising:
[0008] A first reaction device, the first reaction device includes a first reaction tank and a lime adding device. The first reaction tank is connected to the wastewater source, and the lime adding device is configured to apply lime to the first reaction tank;
[0009] A second reaction device, the second reaction device includes a second reaction tank, a defluorination device and a PH adjustment device. The second reaction tank is connected to the first reaction tank. The defluorination device is configured to apply a defluorinating agent to the second reaction tank, and the PH adjustment device is used to adjust the PH value of the liquid in the second reaction tank;
[0010] A first filtration device, both ends of the first filtration device are respectively connected to the first reaction tank and the second reaction tank;
[0011] A second filtration device, the second filtration device is connected to the drain pipe of the second reaction tank.
[0012] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the lime addition device includes a lime milk tank and a lime metering pump. The two ends of the lime metering pump are respectively communicated with the first reaction tank and the lime milk tank.
[0013] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the lime addition device further includes a liquid level gauge, which is arranged on the lime milk tank and is used to monitor the liquid level height of the lime milk in the lime milk tank.
[0014] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the lime addition device further includes a liquid level switch, which is arranged on the lime milk tank and is used to remotely monitor the liquid level height of the lime milk in the lime milk tank.
[0015] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the treatment system for fluorine-containing wastewater further includes a first fluoride ion tester and a first pipeline. The first fluoride ion tester is arranged between the first filtration device and the second reaction tank. The two ends of the first pipeline are respectively connected to the first reaction tank and the pipeline downstream of the first fluoride ion tester, so that unqualified wastewater can flow back to the first reaction tank.
[0016] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the treatment system for fluorine-containing wastewater further includes a second fluoride ion tester and a second pipeline. The second fluoride ion tester is arranged on the drain pipe of the second filtration device. The two ends of the second pipeline are respectively connected to the second reaction tank and the pipeline upstream of the second fluoride ion tester, so that unqualified wastewater can flow back to the second reaction tank.
[0017] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the first filtration device is a vertical paper belt filter press.
[0018] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the second filtration device is a bag filter.
[0019] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the treatment system for fluorine-containing wastewater further includes a pressure gauge, which is arranged at the drain outlet of the second filtration device and is used to detect the pressure of the discharged wastewater.
[0020] As a preferred technical solution of the above-mentioned treatment system for fluorine-containing wastewater, the treatment system for fluorine-containing wastewater further includes a flow meter, which is arranged at the drain outlet of the second filtration device and is used to detect the flow rate of the discharged wastewater.
[0021] Advantages of the present utility model:
[0022] The utility model provides a treatment system for fluorine-containing wastewater. The treatment system for fluorine-containing wastewater includes: a first reaction device, a second reaction device, a first filtration device, and a second filtration device. The first reaction device includes a first reaction tank and a lime addition device. The first reaction tank is connected to the wastewater source, and the lime addition device is configured to apply lime to the first reaction tank. The second reaction device includes a second reaction tank, a defluorination device, and a pH adjustment device. The second reaction tank is connected to the first reaction tank. The defluorination device is configured to apply a defluorinating agent to the second reaction tank, and the pH adjustment device is used to adjust the pH value of the liquid in the second reaction tank. Both ends of the first filtration device are respectively connected to the first reaction tank and the second reaction tank. The second filtration device is connected to the drain pipe of the second reaction tank. This treatment system is directly connected to the wastewater source to achieve on-line treatment, avoiding on-site accumulation. Moreover, the system conducts two reactions for defluorination of fluorine-containing wastewater to improve the treatment effect. At the same time, the two filtrations and pH adjustment can ensure that the discharged wastewater meets the standards and reduce pollution. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.
[0024] Figure 1 It is a schematic structural diagram of the treatment system for fluorine-containing wastewater provided by the embodiment of the present utility model.
[0025] In the figure:
[0026] 1. First reaction tank; 2. Second reaction tank; 3. First filtration device; 4. Second filtration device; 5. Lime milk tank; 6. Lime metering pump; 7. Liquid level gauge; 8. Liquid level switch; 9. First fluoride ion tester; 10. First pipeline; 11. Second fluoride ion tester; 12. Second pipeline; 13. Pressure gauge; 14. Flowmeter; 15. Defluorinating agent tank; 16. Defluorinating agent metering pump; 17. Hydrochloric acid tank; 18. Hydrochloric acid metering pump; 19. Stirring device; 20. Flow control valve; 21. Discharge pump; 22. Third pipeline; 23. Fourth pipeline; 24. pH meter; 25. Liquid level transmitter. Detailed Embodiments
[0027] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.
[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.
[0030] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.
[0031] As Figure 1 shown, the present utility model provides a treatment system for fluorine-containing wastewater. The treatment system for fluorine-containing wastewater includes: a first reaction device, a second reaction device, a first filtration device 3, and a second filtration device 4.
[0032] Specifically, the first reaction device includes a first reaction tank 1 and a lime addition device. The first reaction tank 1 is connected to the wastewater source, and the lime addition device is configured to apply lime to the first reaction tank 1; the second reaction device includes a second reaction tank 2, a defluorination device, and a pH adjustment device. The second reaction tank 2 is connected to the first reaction tank 1. The defluorination device is configured to apply a defluorinating agent to the second reaction tank 2, and the pH adjustment device is used to adjust the pH value of the liquid in the second reaction tank 2; both ends of the first filtration device 3 are respectively connected to the first reaction tank 1 and the second reaction tank 2; the second filtration device 4 is connected to the drain pipe of the second reaction tank 2. This treatment system is directly connected to the wastewater source to achieve on-line treatment, avoiding on-site accumulation; and this system conducts two reactions to remove fluorine from the fluorine-containing wastewater, improving the treatment effect. At the same time, the two filtrations and pH adjustment can ensure that the discharged wastewater meets the standards and reduce pollution.
[0033] Optionally, the lime addition device includes a lime milk tank 5 and a lime metering pump 6. Both ends of the lime metering pump 6 are respectively connected to the first reaction tank 1 and the lime milk tank 5. The lime metering pump 6 can pump the lime milk in the lime milk tank 5 to the first reaction tank 1 to generate solid precipitates. It should be noted that the volume of the lime milk tank 5 is 100L, and the lime metering pump 6 is a variable-frequency pump that can adjust the pumping speed. In this embodiment, the pumping speed of the lime metering pump 6 is 30L / h.
[0034] Furthermore, the lime addition device further includes a liquid level gauge 7. The liquid level gauge 7 is arranged in the lime milk tank 5 and is used to monitor the height of the lime milk in the lime milk tank 5, that is, the content of the lime milk.
[0035] Furthermore, the lime addition device further includes a liquid level switch 8. The liquid level switch 8 is arranged in the lime milk tank 5 and can realize remote monitoring, facilitating the technical staff to replenish the lime milk.
[0036] Optionally, the defluorination device includes a defluorinating agent tank 15 and a defluorinating agent metering pump 16. Both ends of the defluorinating agent metering pump 16 are respectively connected to the second reaction tank 2 and the defluorinating agent tank 15. The defluorinating agent metering pump 16 can pump the defluorinating agent in the defluorinating agent tank 15 to the second reaction tank 2 to remove fluoride ions. It should be noted that the volume of the defluorinating agent tank 15 is 1000L, and the defluorinating agent metering pump 16 is a variable-frequency pump that can adjust the pumping speed. In this embodiment, the pumping speed of the defluorinating agent metering pump 16 is 300L / h.
[0037] Furthermore, the defluorination device further includes a liquid level gauge 7 and a liquid level switch 8. The liquid level gauge 7 and the liquid level switch 8 are both arranged in the defluorinating agent tank 15 and are jointly used to monitor the height of the defluorinating agent in the defluorinating agent tank 15, that is, the content of the defluorinating agent, facilitating the technical staff to replenish the defluorinating agent in a timely manner.
[0038] Optionally, the pH adjustment device includes a hydrochloric acid tank 17 and a hydrochloric acid metering pump 18. The two ends of the hydrochloric acid metering pump 18 are respectively connected to the second reaction tank 2 and the hydrochloric acid tank 17. The hydrochloric acid metering pump 18 can pump the hydrochloric acid in the hydrochloric acid tank 17 to the second reaction tank 2 to adjust the pH value of the wastewater in the second reaction tank 2 and avoid polluting the environment with overly alkaline wastewater. It should be noted that the volume of the hydrochloric acid tank 17 is 30 L, and the hydrochloric acid metering pump 18 is a variable-frequency pump that can adjust the pumping speed. In this embodiment, the pumping speed of the hydrochloric acid metering pump 18 is 30 ml / min.
[0039] Further, the pH adjustment device further includes a liquid level gauge 7 and a liquid level switch 8. Both the liquid level gauge 7 and the liquid level switch 8 are arranged in the hydrochloric acid tank 17 and are jointly used to monitor the height of the hydrochloric acid in the hydrochloric acid tank 17, that is, the content of the hydrochloric acid, which is convenient for the staff to supplement hydrochloric acid in a timely manner.
[0040] Optionally, stirring devices 19 are arranged in the first reaction tank 1, the second reaction tank 2, the lime milk tank 5 and the defluorinating agent tank 15, which can fully stir the substances in the first reaction tank 1, the second reaction tank 2, the lime milk tank 5 and the defluorinating agent tank 15 to achieve the purpose of full mixing.
[0041] Optionally, the fluorine-containing wastewater treatment system further includes a first fluoride ion tester 9 and a first pipeline 10. The first fluoride ion tester 9 is arranged between the first filtering device 3 and the second reaction tank 2. The two ends of the first pipeline 10 are respectively connected to the first reaction tank 1 and the pipeline downstream of the first fluoride ion tester 9, and are used to return the unqualified wastewater to the first reaction tank 1. Specifically, the first fluoride ion tester 9 detects the fluoride ion concentration of the wastewater discharged from the first reaction tank 1. If the fluoride ion concentration exceeds the preset value, the wastewater returns to the first reaction tank 1 through the first pipeline 10 for re-treatment; if the fluoride ion concentration is within the preset value range, the wastewater enters the second reaction tank 2 for treatment.
[0042] Further, flow control valves 20 are arranged on the first pipeline 10 and downstream of the connection of the first pipeline 10 to the second reaction tank 2, and different paths of the wastewater flow are realized through the cooperation of the two flow control valves 20.
[0043] Optionally, the fluorine-containing wastewater treatment system further includes a second fluoride ion tester 11 and a second pipeline 12. The second fluoride ion tester 11 is arranged on the drain pipe of the second filtering device 4. The two ends of the second pipeline 12 are respectively connected to the second reaction tank 2 and the pipeline upstream of the second fluoride ion tester 11, and are used to return the unqualified wastewater to the second reaction tank 2. Specifically, the second fluoride ion tester 11 detects the fluoride ion concentration of the wastewater discharged from the second reaction tank 2. If the fluoride ion concentration exceeds the preset value, the wastewater returns to the second reaction tank 2 through the second pipeline 12 for further treatment; if the fluoride ion concentration is within the preset range, the wastewater is discharged. It should be noted that the fluoride ion concentration must be less than 10 ppm to be discharged.
[0044] Furthermore, flow control valves 20 are arranged on both the second pipeline 12 and the downstream of the connection between the second pipeline 12 and the second filtering device 4, and different paths through which the wastewater flows are realized through the cooperation of the two flow control valves 20.
[0045] Optionally, the first filtering device 3 is a vertical paper belt filter press. The vertical paper belt filter press operates reliably. Through pressure filtration, the maximum filtration pressure is 0.8 MPa; it adopts various filter precision filter papers and filter materials, and has good filtration effect; it can realize automatic and multi-batch cyclic filtration; the filtration area and filtration volume are adjustable and suitable for different flow rates; the filter cake can be dried, and the moisture content of the filter cake can be controlled to reach 30%, improving the filtration effect; and it is suitable for the slag removal working condition with small flow rate and high solid content.
[0046] Optionally, the second filtering device 4 is a bag filter. In this embodiment, two bag filters are arranged in parallel in the fluorine-containing wastewater treatment system to improve the filtration effect. Of course, in some other embodiments, the number of the second filtering devices 4 is determined according to the actual situation and will not be elaborated here.
[0047] Optionally, the fluorine-containing wastewater treatment system further includes a pressure gauge 13. The pressure gauge 13 is arranged at the drain outlet of the second filtering device 4 and is used to measure the pressure of the discharged wastewater. It should be noted that a pressure gauge 13 is arranged between the second reaction tank 2 and the second filtering device 4 and is used to measure the pressure of the wastewater discharged from the second reaction tank 2.
[0048] Optionally, the fluorine-containing wastewater treatment system further includes a flow meter 14. The flow meter 14 is arranged at the drain outlet of the second filtering device 4 and is used to measure the flow rate of the discharged wastewater. It should be noted that a flow meter 14 is arranged between the first reaction tank 1 and the first filtering device 3 and is used to measure the flow rate of the wastewater discharged from the first reaction tank 1.
[0049] Optionally, a discharge pump 21 is provided between the first reaction tank 1 and the first filtering device 3 and between the second reaction tank 2 and the second filtering device 4, which improves the transportation efficiency of the wastewater. It should be noted that the discharge pump 21 is a variable-frequency pump that can adjust the discharge speed. In this embodiment, the discharge speed of the discharge pump 21 is 5000 L / h.
[0050] Optionally, the treatment system for fluoride-containing wastewater further includes a third pipeline 22 and a fourth pipeline 23. The third pipeline 22 is arranged between the discharge pump 21 and the first fluoride ion tester 9. The two ends of the third pipeline 22 are connected to the water outlet of the discharge pump 21 and the first reaction tank 1. Flow control valves 20 are arranged on the third pipeline 22 and on the pipeline upstream of the first fluoride ion tester 9, and they can cooperate with each other to control the flow rate into the first filtering device 3; the fourth pipeline 23 is arranged between the discharge pump 21 and the second filtering device 4. The two ends of the third pipeline 22 are connected to the water outlet of the discharge pump 21 and the second reaction tank 2. A flow control valve 20 is arranged on the third pipeline 22, which can adjust the flow rate into the second filtering device 4.
[0051] Optionally, the first reaction tank 1 is provided with a pH meter 24 and a liquid level transmitter 25. The pH meter 24 is used to detect the pH value of the liquid in the first reaction tank 1, and the liquid level transmitter 25 is used to remotely monitor the height of the liquid in the first reaction tank 1; the second reaction tank 2 is provided with a pH meter 24, a liquid level transmitter 25 and a liquid level switch 8. The pH meter 24 is used to detect the pH value of the liquid in the second reaction tank 2, and the liquid level transmitter 25 and the liquid level switch 8 are jointly used to monitor the height of the liquid in the second reaction tank 2.
[0052] In addition, the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A system for treating fluorine-containing wastewater, characterized in that: include: A first reaction device, the first reaction device comprising a first reaction tank (1) and a lime adding device, the first reaction tank (1) being connected to a wastewater source, the lime adding device being configured to add lime to the first reaction tank (1); a second reaction device, the second reaction device comprising a second reaction tank (2), a defluorination device and a pH adjustment device, the second reaction tank (2) being connected to the first reaction tank (1), the defluorination device being configured to apply a defluorination agent to the second reaction tank (2), and the pH adjustment device being used to adjust the pH value of the liquid in the second reaction tank (2); A first filtering device (3), wherein two ends of the first filtering device (3) are respectively connected to the first reaction tank (1) and the second reaction tank (2); A second filtering device (4), wherein the second filtering device (4) is connected to a drainage pipe of the second reaction tank (2).
2. A fluorine-containing wastewater treatment system according to claim 1, characterized in that: The lime adding device comprises a lime milk tank (5) and a lime metering pump (6), and two ends of the lime metering pump (6) are respectively connected to the first reaction tank (1) and the lime milk tank (5).
3. A fluorine-containing wastewater treatment system according to claim 2, characterized in that: The lime adding device further comprises a liquid level meter (7), which is arranged in the lime milk tank (5) and is used to monitor the liquid level of the lime milk in the lime milk tank (5).
4. A fluorine-containing wastewater treatment system according to claim 2, characterized in that: The lime adding device further comprises a liquid level switch (8), which is arranged in the lime milk tank (5) and is used for remotely monitoring the liquid level of the lime milk in the lime milk tank (5).
5. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The fluorine-containing wastewater treatment system further comprises a first fluoride ion tester (9) and a first pipeline (10); the first fluoride ion tester (9) is arranged between the first filtering device (3) and the second reaction tank (2); two ends of the first pipeline (10) are respectively connected to the first reaction tank (1) and the pipeline downstream of the first fluoride ion tester (9), so that unqualified wastewater can flow back to the first reaction tank (1).
6. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The fluorine-containing wastewater treatment system further comprises a second fluoride ion tester (11) and a second pipeline (12). The second fluoride ion tester (11) is arranged in the drainage pipe of the second filtering device (4). The two ends of the second pipeline (12) are respectively connected to the second reaction tank (2) and the pipeline upstream of the second fluoride ion tester (11), so that unqualified wastewater can flow back to the second reaction tank (2).
7. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The first filtering device (3) is a vertical paper belt filter press.
8. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The second filtering device (4) is a bag filter.
9. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The fluorine-containing wastewater treatment system further comprises a pressure gauge (13), which is arranged at the drainage outlet of the second filtering device (4) and is used to detect the pressure of the discharged wastewater.
10. A fluorine-containing wastewater treatment system according to any one of claims 1 to 4, characterized in that: The fluorine-containing wastewater treatment system further comprises a flow meter (14), which is arranged at the drainage outlet of the second filtering device (4) and is used to detect the flow rate of the discharged wastewater.