Deep fluorine removal system for high-fluorine mine water

Abstract

The utility model relates to the technical field of fluorine removal of high-fluorine mine water, and particularly discloses a deep fluorine removal system for high-fluorine mine water. The air floatation and defluorination integrated device is arranged on one side of the raw water treatment assembly and is communicated with the raw water treatment assembly; the dosing assembly is communicated with the air flotation and defluorination integrated device; one end of the water purification tank is communicated with the raw water treatment assembly and the air flotation defluorination integrated device; and the sludge treatment assembly is communicated with the bottom of the air flotation and defluorination integrated device. According to the deep defluorination system for the high-fluorine mine water, the defluorination efficiency of the high-fluorine mine water is improved, the operation cost is reduced, and meanwhile, the stability of the treatment effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to high fluorine mine water defluorination technical field especially is facing a depth defluorination system of high fluorine mine water. BACKGROUND

[0002] High fluorine mine water is a kind of underground water containing high concentration fluoride, and long-term drinking or contacting high fluorine water can cause adverse effects on human health, such as dental fluorosis, fluorosis, etc. The traditional mine water treatment process is often difficult to effectively remove fluoride in water, especially for high fluorine mine water, the processing difficulty is greater. Therefore, developing an efficient, economic, environmentally friendly deep defluorination system is of great significance to ensure the safe use of mine water resources. At present, although there are some defluorination technologies and equipment in the market, there are still many deficiencies in the deep defluorination system for high fluorine mine water, such as low processing efficiency, high operation cost, unstable treatment effect and other problems.

[0003] Therefore, how to solve the problems of low processing efficiency, high operation cost and unstable treatment effect of the deep defluorination system for high fluorine mine water has become a technical problem urgently to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0004] In view of this, the utility model provides a depth defluorination system for high fluorine mine water in view of the deficiencies of the prior art, aiming at solving the problems of low processing efficiency, high operation cost and unstable treatment effect of the deep defluorination system for high fluorine mine water.

[0005] The utility model provides a depth defluorination system for high fluorine mine water, comprising:

[0006] Raw water treatment component;

[0007] Air floatation defluorination integrated device is arranged at one side of the raw water treatment component, and is communicated with the raw water treatment component;

[0008] Dosing component is communicated with the air floatation defluorination integrated device;

[0009] Water purification tank, one end of the water purification tank is communicated with the raw water treatment component, the air floatation defluorination integrated device;

[0010] Sludge treatment component is communicated with the bottom of the air floatation defluorination integrated device.

[0011] Further, the raw water treatment component comprises:

[0012] Raw water conditioning tank;

[0013] The raw water mixer is arranged in the raw water adjusting pool and fixedly installed on the inner side wall of the raw water adjusting pool close to the raw water inlet.

[0014] The raw water lifting pump has one end extending into the raw water adjusting pool and the other end communicating with the clean water pool.

[0015] Further, the gas flotation and fluorine removal integrated device comprises:

[0016] The micro-nano bubble generator;

[0017] The gas-liquid separation tank has one end communicating with the micro-nano bubble generator;

[0018] The raw water fluorine removal tank has one end communicating with the other end of the gas-liquid separation tank and one end of the raw water lifting pump, and the other end of the raw water fluorine removal tank communicates with the clean water pool and the micro-nano bubble generator.

[0019] Further, the gas flotation and fluorine removal integrated device further comprises:

[0020] The defluorination tank, flocculation tank, gas flotation tank and scum tank are arranged in the raw water fluorine removal tank, and the defluorination tank, flocculation tank, gas flotation tank and scum tank are sequentially communicated along the raw water flow direction, and the bottom of the defluorination tank, flocculation tank and gas flotation tank is provided with a vent pipe;

[0021] The scum scraper is arranged on the top of the scum tank and used for scraping the scum on the surface of the scum tank, and the side of the scum scraper away from the gas flotation tank is provided with a scum discharge pipe.

[0022] Further, the gas flotation and fluorine removal integrated device further comprises:

[0023] The sludge tank has a plurality of sludge tanks, and the plurality of sludge tanks are uniformly arranged on the bottom of the scum tank, and each sludge tank is provided with a sludge discharge pipe.

[0024] Further, the dosing assembly comprises:

[0025] The defluorination agent dosing device, coagulant dosing device and PAM dosing device have one end communicating with the raw water fluorine removal tank, and the other end of the defluorination agent dosing device, coagulant dosing device and PAM dosing device communicates with the medicament storage tank, and is respectively used for adding defluorination agent, coagulant and PAM into the raw water fluorine removal tank.

[0026] Further, the fluoride removal agent dosing device, coagulant dosing device and PAM dosing device are respectively provided with first, second and third pressure transmitters on the pipelines connected with the raw water fluoride removal tank.

[0027] Further, the fluoride removal agent dosing device, coagulant dosing device and PAM dosing device are respectively provided with first, second and third flow meters on the pipelines connected with the raw water fluoride removal tank.

[0028] Further, the sludge treatment assembly comprises:

[0029] a sludge collection tank connected with the raw water fluoride removal tank;

[0030] a sludge conditioning tank connected with the sludge conditioning tank and used for chemically or physically conditioning the sludge;

[0031] a plate-and-frame filter press arranged downstream of the sludge conditioning tank and used for pressure filtering the conditioned sludge;

[0032] a sludge cake conveying device arranged downstream of the plate-and-frame filter press and used for conveying and treating the pressure-filtered sludge cake.

[0033] Further, the clean water tank is connected with an external discharge tank at an end far from the raw water fluoride removal tank.

[0034] Compared with the prior art, the present application has the following advantages:

[0035] (1) The pollutants in wastewater that are difficult to be treated by the sedimentation method can be effectively removed, and the pollutants in wastewater that can be treated by the sedimentation method can also be effectively removed.

[0036] (2) The surface load of the air flotation tank can be more than 12 m 3 / (m 2 ·h), the residence time of the water flow in the tank is only 10 to 20 minutes, and the depth of the tank is about 2 meters. Therefore, the land occupation area is only 1 / 2 to 1 / 8 of that of the sedimentation method, and the tank volume is only 1 / 4 to 1 / 8 of that of the sedimentation method.

[0037] (3) The water content of the scum is relatively low, generally below 96%. Compared with the same dry weight of sludge produced by the sedimentation method, the volume is reduced by 2 to 10 times. This simplifies the sludge disposal process and saves the sludge disposal cost. In addition, the air flotation surface is more convenient for removing sludge than the sedimentation tank bottom.

[0038] (4) The air flotation tank not only has the function of removing suspended solids, but also has the functions of pre-aeration, decolorization and reducing chemical oxygen demand (COD). The effluent and the sludge both contain a certain amount of oxygen, which is beneficial to subsequent treatment, and the sludge is not easy to deteriorate.

[0039] (5) The reagent used in the air floatation method is less than that in the precipitation method. When the flocculant is used as the destabilizing agent, the air floatation method does not need to form the alunite with large size, and thus the reaction time is short. BRIEF DESCRIPTION OF DRAWINGS

[0040] Fig. 1 It is the overall structure schematic view of the depth defluorination system for high-fluorine mine water of the utility model;

[0041] Fig. 2 It is the structure schematic view of the air floatation defluorination integrated device of the depth defluorination system for high-fluorine mine water of the utility model.

[0042] In the figure: 110, raw water regulating tank; 120, raw water agitator; 130, raw water lifting pump; 210, micro-nano bubble generator; 220, gas-liquid separation tank; 230, raw water defluorination tank; 231, defluorination agent agitator; 232, coagulant agitator; 233, PAM agitator; 240, vent pipe; 250, slag scraper; 260, slag discharge pipe; 270, sludge discharge pipe; 310, defluorination agent dosing device; 320, coagulant dosing device; 330, PAM dosing device; 340, first pressure transmitter; 350, second pressure transmitter; 360, third pressure transmitter; 370, first flow meter; 380, second flow meter; 390, third flow meter; 400, drainage tank. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0045] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features defined with "first", "second", etc. can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Referring to Figs. 1-2 As shown in the drawings, the embodiment provides a deep defluorination system for high-fluorine mine water, comprising:

[0048] A raw water treatment assembly;

[0049] A gas float defluorination integrated device is arranged on one side of the raw water treatment assembly and is in communication with the raw water treatment assembly;

[0050] A dosing assembly is in communication with the gas float defluorination integrated device;

[0051] A clean water tank, one end of the clean water tank is in communication with the raw water treatment assembly and the gas float defluorination integrated device;

[0052] A sludge treatment assembly is in communication with the bottom of the gas float defluorination integrated device.

[0053] It can be understood that the deep defluorination system for high-fluorine mine water provided by the embodiment improves the defluorination efficiency of high-fluorine mine water, reduces the operation cost, and ensures the stability of the treatment effect. The raw water is preliminarily treated by the raw water treatment assembly, then deep defluorination is performed by the gas float defluorination integrated device, and the dosing assembly accurately adds reagents, thereby improving the defluorination effect. The design of the clean water tank further improves the quality of the treated water, and the sludge treatment assembly effectively treats the generated sludge, thereby avoiding secondary pollution. The whole system has compact structure and is easy to operate.

[0054] It can be understood that the embodiment has good removal effect on pollutants in wastewater that is difficult to treat by the sedimentation method; and for pollutants in wastewater that can be treated by the sedimentation method, a good removal effect is usually achieved. The surface load of the gas float tank can exceed 12 m 3 / (m 2·h), the residence time of the water flow in the tank is only 10 to 20 minutes, and the depth of the tank is about 2 meters. Therefore, the footprint is only 1 / 2 to 1 / 8 of that of the sedimentation method, and the tank volume is only 1 / 4 to 1 / 8 of that of the sedimentation method. The dross has a low water content, generally below 96%. Compared with the same dry weight of sludge produced by the sedimentation method, the volume is reduced by 2 to 10 times. This simplifies the sludge disposal process and saves sludge disposal costs. In addition, the gas flotation surface is more convenient than the sedimentation tank bottom for sludge discharge. In addition to the function of removing suspended solids, gas flotation can also play a role in pre-aeration, decolorization, and reduction of chemical oxygen demand (COD). The effluent and dross both contain a certain amount of oxygen, which is beneficial to subsequent treatment, and the sludge is not prone to deterioration. The gas flotation method uses less reagent than the sedimentation method. When using a flocculant as a destabilizing agent, the gas flotation method does not need to form large-sized alum flowers, so the reaction time required is shorter.

[0055] Specifically, the raw water treatment assembly comprises:

[0056] a raw water conditioning tank 110;

[0057] a raw water agitator 120 arranged inside the raw water conditioning tank 110, and the raw water agitator 120 is fixedly installed on the inner side wall of the raw water conditioning tank 110 close to the raw water inlet;

[0058] a raw water lifting pump 130, one end of which extends into the interior of the raw water conditioning tank 110, and the other end of the raw water lifting pump 130 is in communication with a clean water tank.

[0059] It can be understood that,

[0060] Specifically, the gas flotation and fluorine removal integrated device comprises:

[0061] a micro-nano bubble generator 210;

[0062] a gas-liquid separation tank 220, one end of which is in communication with the micro-nano bubble generator 210;

[0063] a raw water fluorine removal tank 230, one end of which is in communication with the other end of the gas-liquid separation tank 220 and one end of the raw water lifting pump 130, and the other end of the raw water fluorine removal tank 230 is in communication with the clean water tank and the micro-nano bubble generator 210.

[0064] It can be understood that the micro-nano bubbles generated by the micro-nano bubble generator 210 have a large specific surface area and can more effectively adsorb fluorine ions in water. The gas-liquid separation tank 220 is used to separate water containing micro-nano bubbles from raw water, further improving the fluorine removal efficiency. The raw water fluorine removal tank 230, as the core component of fluorine removal, removes fluorine ions from water through the dual action of chemical reaction and physical adsorption.

[0065] Specifically, the air flotation defluorination integrated device further comprises:

[0066] The defluorination tank, flocculation tank, air flotation tank and dregs tank are all arranged inside the raw water defluorination tank 230, and the defluorination tank, flocculation tank, air flotation tank and dregs tank are sequentially connected in the raw water flow direction, and the bottom of the defluorination tank, flocculation tank and air flotation tank is provided with a vent pipe 240;

[0067] The dregs scraper 250 is arranged at the top of the dregs tank and is used for scraping the dregs on the surface of the dregs tank, and the side of the dregs scraper 250 away from the air flotation tank is provided with a dregs discharge pipe 260.

[0068] In the embodiment, the defluorination tank and flocculation tank are further provided with a defluorination agent stirrer 231, coagulant stirrer 232 and PAM stirrer 233.

[0069] It can be understood that the defluorination tank is added with a defluorination agent for chemical reaction with fluorine ions in raw water to generate insoluble fluoride precipitate. The flocculation tank is added with a flocculant to make the small particles and fluoride precipitate in water coagulate into larger flocs, facilitating subsequent separation. The air flotation tank makes the flocs float to the water surface by the action of micro-bubbles to form dregs. The dregs tank collects the dregs and scrapes them by the dregs scraper 250 to avoid the interference of the dregs on the system operation. The vent pipe 240 is arranged to facilitate emptying and maintenance of the defluorination tank, flocculation tank and air flotation tank when needed. The design of the entire air flotation defluorination integrated device fully considers the balance between defluorination efficiency and operation simplicity to ensure efficient and stable operation of the system.

[0070] Specifically, the air flotation defluorination integrated device further comprises:

[0071] The sludge tank has a plurality of sludge tanks, and the plurality of sludge tanks are uniformly arranged at the bottom of the dregs tank, and each sludge tank is internally provided with a sludge discharge pipe 270.

[0072] It can be understood that the sludge tank is used for collecting and storing the sludge precipitated from the bottom of the dregs tank. The arrangement of the sludge discharge pipe 270 enables the sludge to be conveniently discharged from the system for further treatment or disposal, thereby avoiding the accumulation of sludge in the system and possible secondary pollution. By accurately controlling the discharge of sludge, the cleanliness and efficient operation of the system can be maintained. In addition, the arrangement of multiple sludge tanks also provides a larger sludge storage capacity, so that the system can periodically discharge and treat the sludge without interrupting the operation.

[0073] Specifically, the dosing assembly comprises:

[0074] In addition to the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330, one end of the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330 is connected to the raw water fluoride removal tank 230, and the other end of the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330 is connected to the medicament storage tank, respectively used for adding fluoride removal agent, coagulant and PAM into the raw water fluoride removal tank 230.

[0075] It can be understood that by setting the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330, the accurate addition of medicament is ensured. The fluoride removal agent is used to react with fluoride ions to generate insoluble fluoride precipitate; the coagulant promotes the coagulation of small particles and fluoride precipitate; PAM (polyacrylamide) as a flocculant can further enhance the stability and easy separability of the floc. By accurately controlling the amount and time of adding medicament, the defluorination effect and the operation efficiency of the system can be maximized. The setting of the medicament storage tank provides sufficient medicament storage space, ensuring the supply of medicament during continuous operation of the system.

[0076] Specifically, the first pressure transmitter 340, the second pressure transmitter 350 and the third pressure transmitter 360 are respectively arranged on the pipelines connected to the raw water fluoride removal tank 230 of the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330.

[0077] It can be understood that by setting the first pressure transmitter 340, the second pressure transmitter 350 and the third pressure transmitter 360, the pressure change in the medicament adding pipeline can be monitored in real time, so as to accurately control the flow of medicament. This accurate control method is crucial for improving the defluorination effect and stable operation of the system. The first pressure transmitter 340 monitors the pressure of the fluoride removal agent adding pipeline to ensure that the fluoride removal agent can be accurately added to the raw water fluoride removal tank 230 as needed; the second pressure transmitter 350 monitors the pressure of the coagulant adding pipeline to ensure that the amount of coagulant added matches the coagulation needs of small particles and fluoride precipitate in raw water; the third pressure transmitter 360 monitors the output pipeline pressure of the PAM dosing device 330 to ensure that the addition of PAM can further enhance the stability and easy separability of the floc. Through real-time monitoring and feedback of these pressure transmitters, the system can automatically adjust the amount of medicament to adapt to changes in water quality and treatment needs, thereby achieving efficient and stable defluorination effect.

[0078] Specifically, the first flow meter 370, the second flow meter 380 and the third flow meter 390 are respectively arranged on the pipelines connected to the raw water fluoride removal tank 230 of the fluoride removal agent dosing device 310, the coagulant dosing device 320 and the PAM dosing device 330.

[0079] It can be understood that by setting the first flow meter 370, the second flow meter 380 and the third flow meter 390, the addition amount of the medicament can be monitored to ensure that the addition of each medicament meets the preset treatment requirements. The first flow meter 370 monitors the addition amount of the defluorination agent to ensure the effectiveness of the defluorination process; the second flow meter 380 monitors the addition amount of the coagulant to optimize the flocculation effect; and the third flow meter 390 monitors the addition amount of PAM to ensure the stability and easy separation of the floc. These flow meters work together with pressure transmitters to not only provide real-time medicament addition data, but also provide a reliable basis for automatic adjustment of the system.

[0080] Specifically, the sludge treatment assembly comprises:

[0081] A sludge collection tank is connected to the raw water defluorination tank 230.

[0082] A sludge conditioning tank is connected to the sludge conditioning tank and is used for chemical or physical conditioning of the sludge.

[0083] A plate-and-frame filter press is arranged downstream of the sludge conditioning tank and is used for pressure filtration of the conditioned sludge.

[0084] A sludge cake conveying device is arranged downstream of the plate-and-frame filter press and is used for conveying and processing the pressure-filtered sludge cake.

[0085] It can be understood that the sludge collection tank is used to collect the sludge generated from the air flotation and defluorination integrated device. The sludge conditioning tank improves the dewatering performance of the sludge by chemical or physical conditioning, preparing for subsequent pressure filtration. The plate-and-frame filter press uses pressure to squeeze water out of the conditioned sludge, forming a sludge cake with low water content. The sludge cake conveying device conveys the pressure-filtered sludge cake for further processing or disposal. Through this series of sludge treatment steps, the volume and water content of the sludge are effectively reduced, the treatment and disposal cost of the sludge is reduced, and secondary pollution of the environment by the sludge is avoided.

[0086] Specifically, the clean water tank is connected to the raw water defluorination tank 230 at one end.

[0087] It can be understood that the clean water tank, as the last processing unit in the system, mainly functions to further purify the water quality to ensure that the treated water quality meets the discharge standards or reuse requirements. Through a series of complex physical, chemical and biological processes, the clean water tank can remove residual small particles, organic matter and other pollutants in the water, significantly improving the water quality. The effluent tank 400 is used to store and process the treated clean water, facilitating subsequent discharge or reuse. This not only improves the utilization rate of water resources, but also effectively protects the environment and avoids pollution of natural water bodies by sewage.

[0088] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A deep defluoridation system for high-fluoride mine water, characterized in that, include: Raw water treatment components; An integrated air flotation defluoridation device is installed on one side of the raw water treatment component and is connected to the raw water treatment component. The dosing assembly is connected to the integrated air flotation defluorination device. A water purification tank, one end of which is connected to both the raw water treatment component and the integrated air flotation defluorination device; The sludge treatment component is connected to the bottom of the integrated air flotation defluorination device.

2. The deep defluoridation system for high-fluoride mine water according to claim 1, characterized in that, The raw water treatment component includes: Raw water regulating tank; A raw water mixer is installed inside the raw water regulating tank, and the raw water mixer is fixedly installed on the inner wall of the raw water regulating tank near the raw water inlet. The raw water lift pump has one end inserted into the interior of the raw water regulating tank, and the other end of the raw water lift pump is connected to the purified water tank.

3. The deep defluoridation system for high-fluoride mine water according to claim 2, characterized in that, The integrated air flotation defluorination device includes: Micro-nano bubble generator; A gas-liquid separator, one end of which is connected to the micro-nano bubble generator; The raw water defluoridation tank is connected at one end to the other end of the gas-liquid separator and at one end of the raw water booster pump, and at the other end to the water purification tank and the micro-nano bubble generator.

4. The deep defluoridation system for high-fluoride mine water according to claim 3, characterized in that, The integrated air flotation defluorination device also includes: The defluoridation tank, flocculation tank, flotation tank and scum tank are all located inside the raw water defluoridation tank, and the defluoridation tank, flocculation tank, flotation tank and scum tank are connected in sequence along the raw water flow direction. The bottom of the defluoridation tank, flocculation tank and flotation tank are all equipped with vent pipes. A scum scraper is installed at the top of the scum pool to scrape off the scum on the surface of the scum pool, and a scum discharge pipe is provided on the side of the scum scraper away from the flotation pool.

5. The deep defluoridation system for high-fluoride mine water according to claim 4, characterized in that, The integrated air flotation defluorination device also includes: The sludge tanks are arranged in a plurality of them, and the plurality of sludge tanks are evenly arranged at the bottom of the scum tank, and each of the sludge tanks is provided with a sludge discharge pipe inside.

6. The deep defluoridation system for high-fluoride mine water according to claim 5, characterized in that, The dosing assembly includes: The system includes a defluoridator dosing device, a coagulant dosing device, and a PAM dosing device. One end of each of these devices is connected to the raw water defluoridation tank, and the other end is connected to a reagent storage tank. These devices are used to add defluoridator, coagulant, and PAM to the raw water defluoridation tank, respectively.

7. The deep defluoridation system for high-fluoride mine water according to claim 6, characterized in that, The defluoridator dosing device, coagulant dosing device, and PAM dosing device are connected to the raw water defluoridation tank by a first pressure transmitter, a second pressure transmitter, and a third pressure transmitter, respectively.

8. The deep defluoridation system for high-fluoride mine water according to claim 7, characterized in that, The pipelines connecting the defluoridator dosing device, the coagulant dosing device, and the PAM dosing device to the raw water defluoridation tank are also equipped with a first flow meter, a second flow meter, and a third flow meter, respectively.

9. The deep defluoridation system for high-fluoride mine water according to claim 8, characterized in that, The sludge treatment assembly includes: The sludge collection tank is connected to the raw water defluoridation tank. A sludge conditioning tank, connected to the sludge conditioning tank, is used for chemical or physical conditioning of sludge; A plate and frame filter press is located downstream of the sludge conditioning tank and is used to filter the conditioned sludge. A cake conveying device is located downstream of the plate and frame filter press and is used to convey and process the filtered cake.

10. The deep defluoridation system for high-fluoride mine water according to claim 9, characterized in that, The end of the water purification tank away from the raw water defluoridation tank is connected to an external drainage tank.

Images