High-fluorine wastewater recovery device

Abstract

The utility model relates to the technical field of high-fluorine wastewater recovery devices, and particularly discloses a high-fluorine wastewater recovery device which comprises a chemical sedimentation tank, a flocculation sedimentation tank, a stirrer, a water pump and a transmission pump, the flocculation sedimentation tank is arranged on one side of the chemical sedimentation tank, a first conical bottom is arranged at the bottom of the chemical sedimentation tank, and a second conical bottom is arranged at the lower end of the flocculation sedimentation tank; the water pump is arranged between the chemical sedimentation tank and the flocculation sedimentation tank, an inlet of the water pump is provided with a drainage mechanism which is respectively communicated with the middle part and the bottom of the chemical sedimentation tank, and an outlet of the water pump is provided with a water conveying mechanism which is respectively communicated with the upper part of the flocculation sedimentation tank and the first conical bottom; stirrers are arranged at the upper ends of the chemical sedimentation tank and the flocculation sedimentation tank, the lower ends of the corresponding stirrers respectively extend to the middle lower parts of the chemical sedimentation tank and the flocculation sedimentation tank, a transmission pump is arranged on one side of the flocculation sedimentation tank, an inlet of the transmission pump is communicated with the second conical bottom through a pipeline, and an output pipe is arranged at an outlet of the transmission pump.

Description

Technical Field

[0001] This utility model relates to the technical field of high-fluoride wastewater recovery devices, specifically to a high-fluoride wastewater recovery device. Background Technology

[0002] With the rapid development of the photovoltaic new energy field, the resource utilization of various enterprises is gradually gaining attention. Photovoltaic companies use hydrofluoric acid for pickling, etching and other processes. The acidic wastewater from photovoltaic production is characterized by high fluoride content and few impurities. The fluoride content accounts for more than 90% of the total fluoride content in the wastewater, with a concentration of several thousand mg / L. This generates a large amount of fluoride-containing wastewater that needs to be treated to meet standards. In addition, the treatment also generates sludge of low-component fluorite. If this fluoride cannot be recycled, it will cause a great waste of resources. Therefore, it would be very meaningful to realize the recycling and reuse of high-quality fluorite in the production of hydrofluoric acid, forming a circular hydrofluoric acid industrial chain. Moreover, it can also save resources and make full use of resources.

[0003] Therefore, a high-fluoride wastewater recovery device is needed to address the technical problem described above. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the above-mentioned technology and provide a high-fluoride wastewater recovery device.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is a high-fluoride wastewater recovery device, comprising:

[0006] The system includes a chemical sedimentation tank, a flocculation sedimentation tank, an agitator, a water pump, and a transfer pump. The flocculation sedimentation tank is located on one side of the chemical sedimentation tank. The bottom of the chemical sedimentation tank has a first conical bottom, and the lower end of the flocculation sedimentation tank has a second conical bottom. The water pump is located between the chemical sedimentation tank and the flocculation sedimentation tank. The inlet of the water pump has a drainage mechanism that is connected to the middle and bottom of the chemical sedimentation tank. The outlet of the water pump has a water delivery mechanism that is connected to the upper part of the flocculation sedimentation tank and the first conical bottom. Both the chemical sedimentation tank and the flocculation sedimentation tank have agitators at their upper ends, and the lower ends of the agitators extend to the lower middle part of the chemical sedimentation tank and the flocculation sedimentation tank, respectively. A transfer pump is located on one side of the flocculation sedimentation tank. The inlet of the transfer pump is connected to the second conical bottom through a pipe, and the outlet of the transfer pump has an output pipe.

[0007] The flocculation sedimentation tank is provided with a lower drainage pipe at the bottom and a bottom drainage pipe at the lower end of the second cone-shaped bottom. Both the lower drainage pipe and the bottom drainage pipe are provided with a first automatic valve.

[0008] The first cone-shaped part is provided with a slag discharge pipe at its lower end, and the slag discharge pipe is provided with a fourth automatic valve.

[0009] It also includes measuring instruments.

[0010] As an improvement, the drainage mechanism includes a primary pipe, an upper secondary pipe, a lower secondary pipe, and a first tee pipe. One end of the primary pipe is connected to the inlet of the water pump, and the other end of the primary pipe is provided with a first tee pipe. The first tee pipe is provided with an upper secondary pipe and a lower secondary pipe, respectively. The other end of the upper secondary pipe is connected to the middle of the chemical precipitation tank, and the other end of the lower secondary pipe is connected to the bottom of the chemical precipitation tank. Both the upper secondary pipe and the lower secondary pipe are provided with a second automatic valve.

[0011] As an improvement, the water delivery mechanism includes a main pipe, an upper branch pipe, a lower branch pipe, and a second tee pipe. One end of the main pipe is connected to the outlet of the water pump, and the other end of the main pipe is provided with a second tee pipe. The second tee pipe is provided with an upper branch pipe and a lower branch pipe respectively. The other end of the upper branch pipe is connected to the upper end of the flocculation sedimentation tank, and the other end of the lower branch pipe is connected to the first conical bottom. Both the upper branch pipe and the lower branch pipe are provided with a third automatic valve.

[0012] As an improvement, the measuring instruments include a pH analyzer, a conductivity meter, and a fluoride ion analyzer, used to measure the liquid water quality in chemical precipitation tanks and flocculation sedimentation tanks.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] Lime or calcium chloride is added to the fluoride wastewater in the chemical precipitation tank to carry out a chemical reaction, thereby achieving chemical precipitation and separation of impurities. After the reaction is completed, the middle and upper liquid is pumped into the flocculation sedimentation tank, where a small amount of coagulant, flocculant and pH adjustment are added to carry out flocculation, forming calcium fluoride flocs. After sedimentation, the fluorite component is collected. The collected fluorite component is then dehydrated and dried to reach its utilization value, thus realizing the full utilization of resources.

[0015] This device is designed for sequential batch operation, is highly adaptable to changes in wastewater concentration, and employs precise dosing control for both waste liquid and reagents. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-fluoride wastewater recovery device according to this utility model.

[0017] As shown in the figure:

[0018] 100. Chemical sedimentation tank; 101. First conical bottom; 102. Slag discharge pipe; 103. Fourth automatic valve; 200. Flocculation sedimentation tank; 201. Second conical bottom; 202. Lower drain pipe; 203. Bottom drain pipe; 204. First automatic valve; 300. Agitator; 400. Water pump; 500. Transfer pump; 501. Output pipe; 601. Primary pipeline; 602. Upper secondary pipeline; 603. Lower secondary pipeline; 604. First tee pipe; 605. Second automatic valve; 701. Main pipe; 702. Upper branch pipe; 703. Lower branch pipe; 704. Second tee pipe; 705. Third automatic valve; 801. pH analyzer; 802. Conductivity meter; 803. Fluoride ion analyzer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Combined with appendix Figure 1 A high-fluoride wastewater recovery device, comprising:

[0021] Chemical sedimentation tank 100 is used for the preliminary treatment of high-fluoride wastewater. By adding lime or calcium chloride, a chemical reaction is carried out to cause the fluoride ions in the wastewater to react and form insoluble precipitates.

[0022] Flocculation sedimentation tank 200 is located on one side of chemical sedimentation tank 100 and is used to further treat the liquid that has undergone preliminary sedimentation. Flocculation is carried out by adding a small amount of coagulant, flocculant and pH adjustment to form calcium fluoride flocs.

[0023] Agitator 300: Agitators 300 are provided at the upper end of both the chemical precipitation tank 100 and the flocculation sedimentation tank 200. The lower ends of the agitators 300 extend to the lower part of the chemical precipitation tank 100 and the flocculation sedimentation tank 200, respectively, to ensure that the reagents and wastewater are fully mixed and to improve the precipitation and flocculation efficiency.

[0024] A water pump 400 is installed between a chemical sedimentation tank 100 and a flocculation sedimentation tank 200. The inlet of the water pump 400 is equipped with a drainage mechanism, which is connected to the middle and bottom of the chemical sedimentation tank 100 respectively. The outlet of the water pump 400 is equipped with a water delivery mechanism, which is connected to the upper part and the first conical bottom 101 of the flocculation sedimentation tank 200 respectively. The water delivery mechanism is responsible for pumping the liquid in the chemical sedimentation tank to the flocculation sedimentation tank and adjusting the water flow direction as needed to realize the circulation of wastewater.

[0025] A transfer pump 500 is provided on one side of the flocculation sedimentation tank 200. The inlet of the transfer pump 500 is connected to the second conical bottom 201 through a pipe, and the outlet of the transfer pump 500 is provided with an output pipe 501.

[0026] The chemical precipitation tank 100 is provided with a first conical bottom 101 at the bottom, and a slag discharge pipe 102 is provided at the lower end of the first conical bottom 101. A fourth automatic valve 103 is provided on the slag discharge pipe 102 for discharging the residue in the first conical bottom 101.

[0027] The flocculation sedimentation tank 200 is provided with a second conical bottom 201 at the lower end, and a lower drain pipe 202 is provided at the bottom of the flocculation sedimentation tank 200. A bottom drain pipe 203 is provided at the lower end of the second conical bottom 201. A first automatic valve 204 is provided on both the lower drain pipe 202 and the bottom drain pipe 203.

[0028] The sediment can be drained and fed into the on-site sludge treatment system;

[0029] It also includes measuring instruments.

[0030] The drainage mechanism includes a primary pipe 601, an upper secondary pipe 602, a lower secondary pipe 603, and a first tee pipe 604. One end of the primary pipe 601 is connected to the inlet of the water pump 400, and the other end of the primary pipe 601 is provided with the first tee pipe 604. The upper secondary pipe 602 and the lower secondary pipe 603 are respectively provided on the first tee pipe 604. The other end of the upper secondary pipe 602 is connected to the middle of the chemical precipitation tank 100, and the other end of the lower secondary pipe 603 is connected to the bottom of the chemical precipitation tank 100. A second automatic valve 605 is provided on both the upper secondary pipe 602 and the lower secondary pipe 603.

[0031] The water delivery mechanism includes a main pipe 701, an upper branch pipe 702, a lower branch pipe 703, and a second tee pipe 704. One end of the main pipe 701 is connected to the outlet of the water pump 400, and the other end of the main pipe 701 is provided with the second tee pipe 704. The second tee pipe 704 is provided with the upper branch pipe 702 and the lower branch pipe 703 respectively. The other end of the upper branch pipe 702 is connected to the upper end of the flocculation sedimentation tank 200, and the other end of the lower branch pipe 703 is connected to the first conical bottom 101. A third automatic valve 705 is provided on both the upper branch pipe 702 and the lower branch pipe 703.

[0032] The measuring instruments include a pH analyzer 801, a conductivity meter 802, and a fluoride ion analyzer 803, which are used to measure the liquid water quality in the chemical precipitation tank 100 and the flocculation sedimentation tank 200.

[0033] In its specific implementation, this invention utilizes the following working principle: applying a chemical method to react fluoride ions to generate fine fluorite particles, while simultaneously reacting soluble impurities to form easily precipitated substances. After the impurities are separated by precipitation, the fluorite components are collected. This invention can effectively recover fluorite components from high-fluoride wastewater, and after simple post-treatment, they can be used as raw materials for the production of hydrofluoric acid.

[0034] First, the fluoride-containing wastewater is transported to the chemical precipitation tank 100. Lime or calcium chloride is then added to the chemical precipitation tank 100 to carry out a chemical reaction. During this process, the mixture is stirred by the stirrer 300 to accelerate the chemical reaction and the formation of precipitate. The data of the liquid in the chemical precipitation tank 100 are measured by the pH analyzer 801 and the conductivity meter 802 to control the reaction process. After the reaction is completed, the liquid in the middle and upper part is pumped into the flocculation sedimentation tank 200 through the upper secondary pipeline 602 by the water pump 400. The sludge and a small amount of residual liquid are cleaned and discharged through the sludge discharge pipe 102 by the fluoride-added wastewater.

[0035] The liquid entering the flocculation sedimentation tank 200 is then mixed with a small amount of coagulant, flocculant, and pH adjustment for flocculation. During this process, the mixture can be accelerated by stirring with a stirrer 300 as needed to speed up the formation of calcium fluoride flocs. The reaction can be monitored by a pH analyzer 801 and a fluoride ion analyzer 803. After sedimentation, the fluorite component is collected. The collected fluorite component is then dehydrated and dried to achieve its utilization value.

[0036] In addition, while recovering fluorite from wastewater, the supernatant can meet the discharge requirements and be discharged through the upper branch pipe 702, while the sludge drainage can enter the on-site sludge treatment system through the lower branch pipe 703.

[0037] This method is also applicable to the recycling of other wastewater that is cleaned using hydrofluoric acid.

[0038] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0041] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-fluorine wastewater recovery device characterized by comprising: It includes: Chemical precipitation tank (100), flocculation sedimentation tank (200), agitator (300), water pump (400) and transmission pump (500), the flocculation sedimentation tank (200) is arranged in chemical precipitation tank (100) one side, the bottom of the chemical precipitation tank (100) is equipped with first conical bottom (101), the lower end of the flocculation sedimentation tank (200) is equipped with second conical bottom (201), the water pump (400) is arranged between chemical precipitation tank (100) and flocculation sedimentation tank (200), the inlet of the water pump (400) is equipped with drainage mechanism, the drainage mechanism is equipped with respectively and the middle part and the bottom of chemical precipitation tank (100) are communicated, the outlet of the water pump (400) is equipped with water delivery mechanism, the water delivery mechanism is communicated with flocculation sedimentation tank (200) upper portion, first conical bottom (101) respectively, the upper end of the chemical precipitation tank (100) and flocculation sedimentation tank (200) is equipped with agitator (300), corresponding the lower end of the agitator (300) extends to the middle lower part of chemical precipitation tank (100), flocculation sedimentation tank (200) respectively, the side of the flocculation sedimentation tank (200) is equipped with transmission pump (500), the inlet of the transmission pump (500) is communicated with second conical bottom (201) through pipeline, the outlet of the transmission pump (500) is equipped with output pipe (501); The bottom of the flocculation sedimentation tank (200) is equipped with lower drain pipe (202), the lower end of the second conical bottom (201) is equipped with bottom drain pipe (203), the lower drain pipe (202) and the bottom drain pipe (203) are all equipped with first automatic valve (204) on them; The lower end of the first conical bottom (101) is equipped with slag discharge pipe (102), the slag discharge pipe (102) is equipped with fourth automatic valve (103) on it; It also includes measuring instruments.

2. The high-fluorine wastewater recovery device according to claim 1, wherein: The drainage mechanism includes a primary pipeline (601), an upper secondary pipeline (602), a lower secondary pipeline (603), and a first three-way pipe (604), one end of the primary pipeline (601) is communicated with the inlet of the water pump (400), the other end of the primary pipeline (601) is equipped with the first three-way pipe (604), the first three-way pipe (604) is respectively equipped with the upper secondary pipeline (602) and the lower secondary pipeline (603), the other end of the upper secondary pipeline (602) is communicated with the middle part of the chemical precipitation tank (100), the other end of the lower secondary pipeline (603) is communicated with the bottom of the chemical precipitation tank (100), the upper secondary pipeline (602) and the lower secondary pipeline (603) are both equipped with second automatic valves (605) on them.

3. The high-fluorine wastewater recovery device according to claim 1, wherein: The water feeding mechanism comprises a main pipe (701), an upper branch pipe (702), a lower branch pipe (703) and a second tee pipe (704), one end of the main pipe (701) is communicated with the outlet of the water pump (400), the other end of the main pipe (701) is provided with the second tee pipe (704), the upper branch pipe (702) and the lower branch pipe (703) are respectively arranged on the second tee pipe (704), the other end of the upper branch pipe (702) is communicated with the upper end of the flocculation and precipitation tank (200), the other end of the lower branch pipe (703) is communicated with the first conical bottom (101), the third automatic valve (705) is arranged on the upper branch pipe (702) and the lower branch pipe (703).

4. The high-fluorine wastewater recovery device according to claim 1, characterized in that: The measuring instrument comprises a PH analyzer (801), a conductivity meter (802) and a fluoride ion analyzer (803) for measuring the liquid water quality in the chemical precipitation tank (100) and the flocculation and precipitation tank (200).

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