Defluorination device for organic fluorine-containing wastewater

Abstract

The utility model relates to a fluorine removal device for organic fluorine-containing wastewater, which comprises air flotation equipment, and the air flotation equipment comprises a water inlet pipe, a mixing box, a PH (potential of hydrogen) adjusting box, a flocculant dosing box, a dissolved air water releaser, an air flotation chamber, a sludge outlet tank, a clear water tank and a water outlet pipe; the water inlet pipe is connected to the mixing box, the mixing box is connected to the PH adjusting box, the PH adjusting box is connected to the flocculating agent dosing box, the flocculating agent dosing box is connected to the air flotation chamber, the air-dissolved water releaser is connected to the air flotation chamber, the mud outlet groove is formed in one side of the air flotation chamber, the clear water groove is connected to the air flotation chamber, and the water outlet pipe is connected to the clear water groove; the fluorine removal agent dispensing tank is connected to the mixing box; the PH regulator dispensing tank is connected to the PH regulating box; the flocculating agent dispensing tank is connected to the flocculating agent feeding box; and the mud scraping plate is arranged above the air floatation chamber. And an air floating type fluorine removal process is adopted, so that long hydraulic retention time is not needed, the occupied area of facilities is small, and the investment cost is low.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of deep fluorine removal processes, in particular to a fluorine removal device for organic fluorine-containing wastewater. BACKGROUND

[0002] Fluorine-containing wastewater usually needs to be defluorinated by a pretreatment system before entering a biochemical treatment system. The pretreatment defluorination can only remove free inorganic fluorine, but the fluorine-containing wastewater of an organic chemical enterprise is usually organic fluorine, which cannot be effectively removed during the pretreatment defluorination, and the fluorine ion cannot be measured by using the selective electrode method. When the wastewater is subjected to anaerobic biochemical treatment, the organic matter is broken under the action of the biochemical bacteria, the organic fluorine is removed, and becomes inorganic fluorine. This is the reason why the influent fluorine ion concentration is greatly increased than the effluent fluorine ion concentration in the sewage treatment. The better the anaerobic treatment effect is, the more obvious the increase of the effluent fluorine ion concentration is, and the influent fluorine ion concentration is usually 2.5 times of the effluent fluorine ion concentration. Based on the above reasons, the wastewater after the biochemical treatment also needs to be deeply defluorinated, so that the fluorine ion concentration can reach the standard for discharge. Most enterprises do not fully consider the above problems when designing the sewage treatment facilities, and the deep defluorination process facilities are not arranged at the end, so that the effluent fluorine ion concentration is not up to the standard. With the improvement of the discharge standard, the deep defluorination at the end is particularly important.

[0003] There are various methods for treating fluorine-containing wastewater at home and abroad at present, mainly including chemical precipitation method, adsorption method, coagulation sedimentation method, electrocoagulation method, ion exchange resin method, reverse osmosis method, liquid membrane method, electrodialysis method, etc. The commonly used methods are the chemical precipitation method, the adsorption method and the coagulation sedimentation method.

[0004] The precipitation method: the chemical precipitation method is the most commonly used method for treating fluorine-containing wastewater, and is particularly common in the pretreatment of high-concentration fluorine-containing wastewater. The precipitation method needs to add chemicals to form fluoride precipitate, and the fluorine ion is removed through the solid separation of the precipitate. The commonly used chemicals include lime, calcium carbide slag, calcium phosphate salt, dolomite or alum, etc. The treatment efficiency depends on the solid-liquid separation effect, therefore, the precipitation method needs sufficient precipitation time, and needs sufficient pool capacity. The precipitation facilities occupy a large area and have high construction cost. The defluorination chemicals used usually have large specific gravity, and need to be used in excess, which greatly increases the quantity of hazardous waste disposal. If light defluorination chemicals are used, the flocculent fluoride is not easy to precipitate (the supernatant liquid contains a small amount of nitrogen gas, and the denitrifying bacteria exist in the sludge in the secondary sedimentation tank. Under the condition of no hydraulic disturbance, the fluoride will completely precipitate only when the precipitation time is greater than the nitrogen overflow time), which leads to the effluent containing sludge.

[0005] Adsorption method: The adsorption method mainly involves passing fluoride-containing wastewater through equipment equipped with fluoride adsorbents or packing materials. Fluoride exchanges with other ions or groups on the adsorbent and remains on it, thus being removed. This is achieved through a contact bed, using ion exchange resins or packed beds for fluoride removal. The adsorbent is then regenerated to restore its exchange capacity. Typically, three or more adsorption units are required, resulting in a large initial investment cost. The adsorbent needs regeneration every three days, leading to frequent operation and a large backwash volume. The adsorbent needs to be replaced every two to three years (packing materials require even more frequent replacement), resulting in high costs. The removed fluoride adsorbent or packing material becomes hazardous waste, increasing disposal costs. Utility Model Content

[0006] In view of the above problems, this application provides a defluorination device for wastewater containing organic fluoride, which solves the problems of large footprint and high investment cost of existing defluorination processes using precipitation.

[0007] To achieve the above objectives, the inventors provide a defluorination device for wastewater containing organic fluoride, comprising:

[0008] The air flotation equipment includes an inlet pipe, a mixing tank, a pH adjustment tank, a flocculant dosing tank, a dissolved air water release device, an air flotation chamber, a sludge discharge tank, a clear water tank, and an outlet pipe.

[0009] The inlet pipe is connected to the mixing tank, the mixing tank is connected to the pH adjustment tank, the pH adjustment tank is connected to the flocculant dosing tank, the flocculant dosing tank is connected to the flotation chamber, the dissolved air water release device is connected to the flotation chamber, the sludge discharge tank is located on one side of the flotation chamber, the clear water tank is connected to the flotation chamber, and the outlet pipe is connected to the clear water tank.

[0010] A defluorinating agent preparation tank, wherein the defluorinating agent preparation tank is connected to a mixing tank;

[0011] A pH adjuster preparation tank, wherein the pH adjuster preparation tank is connected to the pH adjustment box;

[0012] A flocculant dosing tank, wherein the flocculant dosing tank is connected to the flocculant dosing tank;

[0013] A sludge scraper is positioned above the flotation chamber.

[0014] In some embodiments, a stirrer is also included, which is disposed within the mixing tank.

[0015] In some embodiments, the scraper is a chain scraper.

[0016] In some embodiments, it also includes:

[0017] A sludge receiving trough, which is connected to a sludge discharge trough;

[0018] a sludge lifting pump, one end of the sludge lifting pump being connected to a sludge receiving tank;

[0019] a sludge concentration tank, the other end of the sludge lifting pump being connected to the sludge concentration tank.

[0020] In some embodiments, further comprising:

[0021] a first metering pump, the first metering pump being arranged between a defluorination agent dosing tank and a mixing tank;

[0022] a second metering pump, the second metering pump being arranged between a PH adjusting agent dosing tank and a PH adjusting tank;

[0023] a third metering pump, the third metering pump being arranged between a flocculating agent dosing tank and a flocculating agent dosing tank.

[0024] In some embodiments, further comprising:

[0025] a wastewater lifting pump, the wastewater lifting pump being provided with a flow meter, one end of the wastewater lifting pump being connected to a water inlet pipe, the other end of the wastewater lifting pump being connected to a secondary sedimentation tank.

[0026] In some embodiments, the clean water tank is connected to the defluorination agent dosing tank, the PH adjusting agent dosing tank and the flocculating agent dosing tank.

[0027] In some embodiments, the clean water tank is connected to the dissolved air water releasing device.

[0028] Compared with the prior art, the above technical solution has the following advantages: the wastewater containing organic fluorine is sent into the mixing tank through the water inlet pipe, and the defluorination agent in the defluorination agent dosing tank is sent into the mixing tank, so that the wastewater and the defluorination agent are mixed and reacted, the wastewater in the mixing tank is sent into the PH adjusting tank after the mixing and reaction is completed, the PH adjusting agent is added into the PH adjusting tank from the PH adjusting agent dosing tank, so that the PH value of the wastewater in the PH adjusting tank is neutral; the wastewater in the PH adjusting tank is sent into the flocculating agent dosing tank, the flocculating agent is added into the flocculating agent dosing tank from the flocculating agent dosing tank, so that the impurities in the wastewater in the flocculating agent dosing tank are separated, and the flocculating agent dosing tank obtains flocculating alunite-shaped sludge; then the wastewater in the flocculating agent dosing tank enters the air flotation chamber, under the action of the dissolved air water releasing device, the sludge is lifted out of the water surface by the small bubbles, and is suspended on the water surface; the floating sludge is scraped into the sludge outlet tank by the sludge scraping plate, and the clean water after the sludge is removed enters the clean water tank, and the defluorination of the wastewater is completed. Compared with the defluorination process by the sedimentation method, the air flotation defluorination process does not need a long hydraulic retention time, and the air flotation defluorination process has a small facility area and low investment cost.

[0029] The above content related to the utility model is only a summary of the technical scheme of the present application. In order to enable those skilled in the art to more clearly understand the technical scheme of the present application, and then can be implemented according to the content recorded in the specification and drawings, and in order to let the above-mentioned purpose and other purposes, characteristics and advantages of the present application can be more easily understood, the following is described in combination with the specific embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and cannot be considered as a limitation of the present application.

[0031] In the drawings of the specification:

[0032] Figure 1 A structural schematic view of the defluorination device for organic fluorine-containing wastewater according to the specific embodiments;

[0033] Figure 2 Another structural schematic view of the defluorination device for organic fluorine-containing wastewater according to the specific embodiments;

[0034] Figure 3 Another process flow schematic view of the defluorination device for organic fluorine-containing wastewater according to the specific embodiments.

[0035] The reference signs involved in the above drawings are explained as follows:

[0036] 110, air flotation equipment,

[0037] 111, water inlet pipe,

[0038] 112, mixing box,

[0039] 113, PH adjusting box,

[0040] 114, flocculant dosing box,

[0041] 115, dissolved air water releaser,

[0042] 116, air flotation chamber,

[0043] 117, sludge outlet tank,

[0044] 118, clean water tank,

[0045] 119, water outlet pipe,

[0046] 120, defluorination agent dosing tank,

[0047] 130, PH adjusting agent dosing tank,

[0048] 140, flocculant dosing tank,

[0049] 150, a float sludge receiving tank. DETAILED DESCRIPTION

[0050] To make the possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved of the present application clear, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical schemes of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0051] In this article, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical scheme.

[0052] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0053] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally represents that the associated objects before and after are a "or" logical relationship.

[0054] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0055] In the present application, without more limitation, the "include", "contain", "have" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the existence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0056] In the present application, the expressions such as "greater than", "less than", "exceed" and the like are understood as not including the number itself; the expressions such as "above", "below", "within" and the like are understood as including the number itself. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is two or more (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0057] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] Please refer to Figure 1 The present embodiment provides a defluorination device for organic fluorine-containing wastewater, comprising:

[0060] The air flotation device 110 comprises a water inlet pipe 111, a mixing box 112, a PH adjusting box 113, a flocculant dosing box 114, a dissolved air water releaser 115, an air flotation chamber 116, a sludge outlet 117, a clear water tank 118 and a water outlet pipe 119.

[0061] The water inlet pipe 111 is connected to the mixing box 112, the mixing box 112 is connected to the PH adjusting box 113, the PH adjusting box is connected to the flocculant dosing box 114, the flocculant dosing box 114 is connected to the air flotation chamber 116, the dissolved air water release device 115 is connected to the air flotation chamber 116, the sludge outlet 117 is arranged on one side of the air flotation chamber 116, the clear water tank 118 is connected to the air flotation chamber 116, and the water outlet pipe 119 is connected to the clear water tank 118;

[0062] The defluorination agent dosing tank 120 is connected to the mixing box 112.

[0063] The PH adjusting agent dosing tank 130 is connected to the PH adjusting box 113.

[0064] The flocculant dosing tank 140 is connected to the flocculant dosing box 114.

[0065] The sludge scraping plate is arranged above the air flotation chamber 116.

[0066] The wastewater containing organic fluorine is sent into the mixing box 112 through the water inlet pipe 111, and the defluorination agent in the defluorination agent dosing tank is sent into the mixing box 112, so that the wastewater and the defluorination agent are mixed and reacted, the wastewater in the mixing box 112 is sent into the PH adjusting box 113 after the mixing and reaction in the mixing box 112 is completed, the PH adjusting agent is added into the PH adjusting box 113 through the PH adjusting agent dosing tank, so that the PH value of the wastewater in the PH adjusting box 113 is neutral; the wastewater in the PH adjusting box 113 is sent into the flocculant dosing box 114, the flocculant is added into the flocculant dosing box 114 through the flocculant dosing tank 140, so that the impurities in the wastewater in the flocculant dosing box 114 are separated, and the flocculent alum flower-shaped sludge is obtained; then the wastewater in the flocculant dosing box 114 enters the air flotation chamber 116, under the action of the dissolved air water release device 115, the sludge is supported out of the water surface by the fine bubbles, and is suspended on the water surface; the floating sludge is scraped into the sludge outlet 117 by the sludge scraping plate, and the clear water after the sludge is removed enters the clear water tank 118, and the defluorination of the wastewater is completed. Compared with the defluorination process by the sedimentation method, a long hydraulic retention time is required, and no matter whether it is a horizontal flow sedimentation tank or a radial flow sedimentation tank, a large pool capacity is required, the facility occupies a large area, and the investment cost is high. By using the air flotation defluorination process, a long hydraulic retention time is not required, the facility occupies a small area, and the investment cost is low.

[0067] In some embodiments, a stirrer is further included, and the stirrer is arranged in the mixing box 112.

[0068] In order to make the fluoride removal agent in the mixing box 112 and the fluoride-containing wastewater fully mixed and reacted, a stirrer is arranged in the mixing box 112. When the wastewater and the fluoride removal agent are added into the mixing box 112, the stirrer is used for stirring, so that the wastewater and the fluoride removal agent are fully mixed and reacted.

[0069] In some embodiments, the mud scraping plate is a chain type mud scraping plate. By adopting the chain type mud scraping plate, the mud scraping plate is driven by the chain to scrape the mud on the water surface into the mud outlet groove 117, and then is sent back to the starting end, so that the mud on the water surface is continuously scraped into the mud outlet groove 117.

[0070] Please refer to Figures 2-3 In some embodiments, the mud scraping plate is a chain type mud scraping plate. By adopting the chain type mud scraping plate, the mud scraping plate is driven by the chain to scrape the mud on the water surface into the mud outlet groove 117, and then is sent back to the starting end, so that the mud on the water surface is continuously scraped into the mud outlet groove 117.

[0071] The floating mud receiving groove 150 is connected to the mud outlet groove 117.

[0072] The mud lifting pump is connected to the mud receiving groove at one end.

[0073] The mud thickening tank is connected to the other end of the mud lifting pump.

[0074] When the mud is scraped into the mud outlet groove 117, it flows into the floating mud receiving groove 150. The mud in the floating mud receiving groove 150 is lifted to the mud thickening tank by the mud lifting pump, so that the mud is prevented from accumulating in the mud outlet groove 117, and subsequent treatment of the mud is facilitated.

[0075] In some embodiments, the mud scraping plate is a chain type mud scraping plate. By adopting the chain type mud scraping plate, the mud scraping plate is driven by the chain to scrape the mud on the water surface into the mud outlet groove 117, and then is sent back to the starting end, so that the mud on the water surface is continuously scraped into the mud outlet groove 117.

[0076] The first metering pump is arranged between the fluoride removal agent dispensing groove 120 and the mixing box 112.

[0077] The second metering pump is arranged between the PH adjusting agent dispensing groove 130 and the PH adjusting box 113.

[0078] The third metering pump is arranged between the flocculating agent dispensing groove 140 and the flocculating agent dispensing box 114.

[0079] The fluoride removal agent is sent into the mixing box 112 by the first metering pump, the PH adjusting agent is sent into the PH adjusting box 113 by the second metering pump, and the flocculating agent is sent into the flocculating agent dispensing box 114 by the third metering pump, so that the required fluoride removal agent, PH adjusting agent and flocculating agent are respectively added into the mixing box 112, the PH adjusting box 113 and the flocculating agent dispensing box 114 in a metering ratio.

[0080] In some embodiments, the mud scraping plate is a chain type mud scraping plate. By adopting the chain type mud scraping plate, the mud scraping plate is driven by the chain to scrape the mud on the water surface into the mud outlet groove 117, and then is sent back to the starting end, so that the mud on the water surface is continuously scraped into the mud outlet groove 117.

[0081] The wastewater lifting pump is provided with a flow meter, one end of the wastewater lifting pump is connected to the water inlet pipe 111, and the other end of the wastewater lifting pump is connected to the secondary sedimentation tank.

[0082] The wastewater lifting pump is provided with a flow meter, one end of the wastewater lifting pump is connected to the water inlet pipe 111, and the other end of the wastewater lifting pump is connected to the secondary sedimentation tank.

[0083] Please refer to Figure 2 In some embodiments, the clean water tank 118 is connected to the defluorination agent dosing tank 120, the pH regulator dosing tank 130 and the flocculant dosing tank 140.

[0084] The clean water in the clean water tank 118 can be sent to the defluorination agent dosing tank 120, the pH regulator dosing tank 130 and the flocculant dosing tank 140, which is used as the water for dosing the defluorination agent, the pH regulator and the flocculant, without adding fresh water, thereby reducing the operation cost.

[0085] In some embodiments, the clean water tank 118 is connected to the dissolved air water releaser 115. The clean water in the clean water tank 118 can also be sent to the dissolved air water releaser 115 for use as the water for dissolving air, thereby further reducing the operation cost.

[0086] Please refer to Figure 3 In some embodiments, a defluorination device for organic fluorine-containing wastewater has the following working principle:

[0087] 1) Mixing reaction: the defluorination agent and the fluorine-containing wastewater are respectively pumped into the water inlet mixing tank 112 of the specially designed air flotation equipment 110 through the wastewater lifting pump provided with a flow meter and the metering pump, and the defluorination agent and the fluorine-containing wastewater are fully mixed and reacted through the mechanical stirrer, and the reaction time is generally not less than 30 min.

[0088] 2) Adjusting pH value: the wastewater after the mixing reaction in the mixing tank 112 enters the pH value adjusting tank, and the pH value of the mixed solution is neutralized by adding the pH regulator.

[0089] 3) Adding flocculant: the water outlet of the pH value adjusting tank enters the flocculant dosing tank 114, and the flocculant is added in proportion by the metering pump, so that the flocculation of the wastewater reaches the best state.

[0090] 4) Entering the dissolved air water release area of the air flotation equipment 110, under the action of the dissolved air water releaser 115, the sludge is carried out of the water surface by the small bubbles, and is suspended on the water surface.

[0091] 5) Sludge separation: the floating sludge is scraped into the sludge outlet groove 117 by the chain type sludge scraping plate, and flows into the sludge receiving groove by itself, and the sludge is lifted to the sludge concentration tank by the sludge lifting pump.

[0092] 6) The clean water flows to the external discharge tank by high difference, and is discharged up to the standard. The clean water can also be used as water for dispensing and water for dissolving gas.

[0093] The device has the following advantages:

[0094] 1) High fluorine removal efficiency: the lightweight fluorine removal agent is used in small amount, and the fluorine generated by the reaction of the fluorine removal agent with the free fluorine in the wastewater has a light specific gravity, usually in a suspended or semi-suspended state, which is very suitable for air flotation process. The sedimentation method needs a long static residence time to precipitate, and part of the suspended sludge cannot be precipitated under the condition of water disturbance.

[0095] 2) Reduce facility investment cost: the air flotation type fluorine removal process of the device has small facility area and low investment cost. The sedimentation method fluorine removal process needs a long hydraulic residence time, and both the horizontal flow type sedimentation tank and the radial flow type sedimentation tank need a large tank capacity, so the facility area is large and the investment cost is high.

[0096] 3) Reduce operation cost: a large amount of fresh water is needed for backwashing when the adsorbent is regenerated, which will produce a large amount of backwashing wastewater, cause secondary pollution, and increase the cost of wastewater treatment; the device takes water from the equipment outlet for medicine preparation and gas dissolution, without adding fresh water, reducing the operation cost.

[0097] 4) Reduce sludge pressure filtration volume: the device completely separates sludge and water, and it is very difficult to discharge sludge from the bottom of the horizontal flow type sedimentation tank because of the poor rheological property of the sludge, so a track crane is usually installed on the pool surface, and a mortar pump is installed on the track crane to suck the sludge, which often sucks a large amount of clean water, increasing the burden of sludge pressure filtration; although the sludge discharge mode of the radial flow type sedimentation tank is better than that of the horizontal flow type sedimentation tank, the concentration of the discharged sludge is still lower than that of the air flotation type sludge scraping.

[0098] 5) Reduce the amount of hazardous waste: the sedimentation method uses fluorine removal chemicals with high specific gravity, which requires excessive use, greatly increasing the amount of hazardous waste; the adsorbent is replaced every two to three years (the frequency of replacing the filler is higher), and the replaced fluorine adsorbent or filler becomes hazardous waste, increasing the amount of waste; the device uses lightweight fluorine removal agent in small amount, and generates small amount of hazardous waste.

[0099] Finally, it should be noted that the above embodiments have been described in the specification and drawings of the application, but this does not limit the patent protection scope of the application. Any equivalent structure or equivalent process replacement or modification based on the essential concept of the application, using the content described in the specification and drawings of the application, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the application.

Claims

1. A device for removing fluorine from organic fluorine-containing wastewater, characterized by comprising: It comprises: a gas float device, which comprises a water inlet pipe, a mixing box, a PH adjusting box, a flocculant dosing box, a dissolved air water releaser, a gas float chamber, a sludge outlet tank, a clear water tank and a water outlet pipe; the water inlet pipe is connected to the mixing box, the mixing box is connected to the PH adjusting box, the PH adjusting box is connected to the flocculant dosing box, the flocculant dosing box is connected to the gas float chamber, the dissolved air water releaser is connected to the gas float chamber, the sludge outlet tank is arranged on one side of the gas float chamber, the clear water tank is connected to the gas float chamber, and the water outlet pipe is connected to the clear water tank; a defluorination agent dosing tank connected to the mixing box; a PH adjusting agent dosing tank connected to the PH adjusting box; a flocculant dosing tank connected to the flocculant dosing box; a mud scraping plate arranged above the gas float chamber.

2. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by It further comprises a stirrer arranged in the mixing box.

3. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by The mud scraping plate is a chain type mud scraping plate.

4. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by It further comprises: a floating sludge receiving tank connected to the sludge outlet tank; a sludge lifting pump, one end of which is connected to the sludge receiving tank; a sludge concentration tank connected to the other end of the sludge lifting pump.

5. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by It further comprises: a first metering pump arranged between the defluorination agent dosing tank and the mixing box; a second metering pump arranged between the PH adjusting agent dosing tank and the PH adjusting box; a third metering pump arranged between the flocculant dosing tank and the flocculant dosing box.

6. The device for removing fluorine from organic fluorine-containing wastewater according to claim 5, characterized by It further comprises: a wastewater lifting pump, which is provided with a flow meter, one end of which is connected to the water inlet pipe, and the other end of which is connected to the secondary sedimentation tank.

7. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by The clear water tank is connected to the defluorination agent dosing tank, the PH adjusting agent dosing tank and the flocculant dosing tank.

8. The device for removing fluorine from organic fluorine-containing wastewater according to claim 1, characterized by The clear water tank is connected to the dissolved air water releaser.

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