Fluorine removal equipment for non-ferrous metal smelting

Abstract

The utility model discloses fluoride removal equipment for non-ferrous metal metallurgy. The fluoride removal equipment comprises a regulating tank, a reaction tank, a sedimentation tank, a sludge tank and an activation tank, a rotating rod is arranged at the top of the reaction tank and extends into the reaction tank, one end of the rotating rod is in transmission connection with an output shaft of the driving motor, a plurality of stirring rods are arranged on the outer surface of the rotating rod, a plurality of stirring blades are arranged on the outer surfaces of the stirring rods, a cleaning device is arranged at the bottom of the reaction tank, and a fluorine ion detector is arranged in the reaction tank. The bottom of the reaction tank is provided with a defluorination device and a waste acid outlet, the top of the reaction tank is provided with a defluorination agent outlet and a waste acid inlet, and the defluorination device comprises a defluorination agent dosing pump and a defluorination agent liquid storage tank. According to the utility model, the defluorination efficiency can be accelerated by utilizing the stirring rod. And the addition amount of the fluorine removal agent is accurately controlled through the fluorine ion detector. The service life of the reaction tank is prolonged by arranging the cleaning device. And the fluorine removal agent can be effectively recovered by arranging the activating tank, so that the cyclic utilization rate of the fluorine removal agent is improved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, and in particular to a defluorination device for non-ferrous metal smelting. Background Technology

[0002] Non-ferrous metal smelting processes generate large amounts of waste acid. Existing treatment processes include lime neutralization, stripping defluorination, membrane concentration, and sulfide precipitation. Direct reuse of wastewater causes significant corrosion to equipment and affects safe production. Therefore, defluorination is necessary to meet emission requirements.

[0003] In existing technologies, most wastewater defluorination processes after non-ferrous metal smelting utilize defluorinating agents. While existing defluorination equipment for non-ferrous metal smelting can remove fluoride from the wastewater, it often suffers from low removal efficiency, poor removal effect, and complex operation. Furthermore, defluorinating agents are typically chemicals such as lime, which remove fluoride ions by reacting with them to form calcium fluoride precipitate. However, controlling the dosage of lime and similar agents is difficult, and long-term use leads to the formation of large amounts of deposits or precipitates in the reaction tank, which can affect the reaction time and defluorination efficiency, ultimately reducing the overall defluorination efficiency. Utility Model Content

[0004] This utility model discloses a non-ferrous metal smelting defluorination equipment that addresses the shortcomings of existing structures by researching and improving upon them, thereby achieving better practical value.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A defluorination device for non-ferrous metal smelting includes an equalization tank, a reaction tank, a sedimentation tank, a sludge tank, and an activation tank.

[0007] The equalization tank, reaction tank, and sedimentation tank are connected in sequence. The reaction tank is also connected to the sludge tank and the activation tank. A rotating rod is installed at the top of the reaction tank, extending into the reaction tank and extending out of the reaction tank at one end, which is connected to the output shaft of the drive motor. Multiple stirring rods and stirring blades are installed on the outer surface of the rotating rod. A cleaning device is installed at the bottom of the reaction tank. A fluoride ion detector is installed inside the reaction tank. A defluorination device and a waste acid outlet are installed at the bottom of the reaction tank, and a defluorinating agent outlet and a waste acid inlet are installed at the top. The defluorination device includes a defluorinating agent dosing pump and a defluorinating agent storage tank.

[0008] In some embodiments, the cleaning device includes a drive device located on the outer wall of the reaction tank and a limiting rod, a threaded rod, a moving shaft, a connector, a scraper, and an electric cylinder located at the bottom inner side of the reaction tank. The limiting rod is slidably connected to both sides of the reaction tank, and the two limiting rods horizontally position the threaded rod inside the threaded rod. One end of the threaded rod near the drive device is connected to the output shaft of the drive device. The moving shaft is sleeved on the threaded rod. An electric cylinder is connected to the upper end of the limiting rod. The electric cylinder is connected to both sides of the reaction tank. The scraper is connected to the moving shaft through the connector.

[0009] In some embodiments, the scraper is installed perpendicular to the threaded rod, and the bottom of the scraper has a beveled surface that abuts against the inner bottom surface of the reaction tank.

[0010] In some embodiments, a drain outlet is provided at the bottom side of the reaction tank, and the sludge tank is connected to the drain outlet via a drain pipe.

[0011] In some embodiments, the system further includes a filtration tank and a filtered waste acid storage tank. The inlet of the activation tank is connected to the defluorinating agent outlet of the reaction tank. The inlet of the sedimentation tank is connected to the waste acid outlet of the reaction tank. The outlet of the sedimentation tank is connected to the inlet of the filtration tank. The waste acid outlet of the filtration tank is connected to the inlet of the filtered waste acid storage tank. The defluorinating agent outlets of the filtration tank and the activation tank are both connected to a defluorinating agent recycling pipeline. The defluorinating agent recycling pipeline is connected to the defluorination device of the adsorption reactor.

[0012] In some embodiments, the activation pool contains an activator.

[0013] In some embodiments, a controller is also included, which is electrically connected to the fluoride ion detector and the defluorinating agent dosing pump, respectively.

[0014] The present invention provides the following advantages:

[0015] By using a drive motor to rotate a rotating rod, which in turn drives the stirring rod and stirring blades, the waste acid and defluorinating agent in the reaction tank are stirred and mixed to remove fluoride, improving the contact efficiency between the waste acid and the defluorinating agent, thereby accelerating the defluorination process. A fluoride ion detector monitors the fluoride ion concentration, and a controller connected to the defluorinating agent dosing pump enables automatic control, eliminating the tedious manual addition of defluorinating agent and precisely controlling the amount added to avoid waste. A cleaning device removes stubborn particles from the bottom of the reaction tank, extending its service life, increasing the internal chemical reaction rate, and improving the reaction range. An activation tank effectively recovers the defluorinating agent, improving its recycling rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a defluorination device for non-ferrous metal smelting proposed in this utility model.

[0017] Figure 2 This is a partially enlarged view of the reaction tank of a defluorination equipment for non-ferrous metal smelting proposed in this utility model.

[0018] In the attached diagram: 10 Equalization tank, 20 Reaction tank, 30 Sedimentation tank, 40 Sludge tank, 41 Sewage discharge pipe, 50 Activation tank, 60 Rotating rod, 61 Stirring rod, 62 Stirring blade, 81 Defluoridant dosing pump, 82 Defluoridant storage tank, 91 Drive device, 92 Limiting rod, 93 Threaded rod, 94 Moving shaft, 95 Connecting parts, 96 Scraper, 97 Electric cylinder, 961 Beveled surface, 100 Filter tank, 110 Filtered acid storage tank, 120 Defluoridant reuse pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] like Figure 1-2As shown in the figure, the non-ferrous metal smelting defluorination equipment provided in this embodiment includes an equalization tank 10, a reaction tank 20, a sedimentation tank 30, a sludge tank 40, an activation tank 50, and a controller (not shown). The equalization tank 10, reaction tank 20, and sedimentation tank 30 are connected in sequence. The reaction tank 20 is also connected to the sludge tank 40 and the activation tank 50 respectively. A fluoride ion detector is installed inside the reaction tank 20. A defluorination device and a waste acid outlet are provided at the bottom of the reaction tank 20, and a defluorinating agent outlet and a waste acid inlet are provided at the top. The defluorination device includes a defluorinating agent dosing pump 81 and a defluorinating agent storage tank 82. The controller is electrically connected to the fluoride ion detector and the defluorinating agent dosing pump 81 respectively. The equalization tank 10 is connected to the waste acid inlet of the reaction tank 20. The equalization tank 10 is equipped with a pH meter and a heating element, used to adjust the pH of the waste acid and then heat the pH-adjusted waste acid. The heated waste acid is pumped into the reaction tank 20, where a defluorinating agent is added to the reaction tank 20 to react with fluoride ions, forming a sparingly soluble solid. A controller receives signals from the fluoride ion detector and controls the defluorinating agent dosing pump 81. The controller is input with a fluoride ion concentration range. If the fluoride ion concentration detected by the fluoride ion detector is lower than the set range, the controller activates the defluorinating agent dosing pump 81 to automatically add defluorinating agent to the reaction tank 20, replacing manual addition and precisely controlling the amount of defluorinating agent added, thus avoiding waste.

[0021] In some embodiments, a rotating rod 60 is provided at the top of the reaction tank 20. The rotating rod 60 extends into the reaction tank 20, with one end extending out of the reaction tank 20 and being connected to the output shaft of the drive motor 70. Multiple stirring rods 61 are provided on the outer surface of the rotating rod 60, and multiple stirring blades 62 are provided on the outer surface of the stirring rods 61. When the input defluorinating agent reaches the required dosage, the defluorinating agent dosing pump 81 is turned off to stop the input. Then, the drive motor 70 is turned on to drive the rotating rod 60 to rotate. At this time, the multiple stirring rods 61 and multiple stirring blades 62 will also rotate accordingly, stirring and mixing the waste acid and defluorinating agent in the reaction tank 20 to remove fluoride, thereby accelerating the defluorination efficiency.

[0022] In some embodiments, a cleaning device is provided at the bottom of the reaction tank 20. The cleaning device includes a drive device 91 located on the outer wall of the reaction tank 20 and a limiting rod 92, a threaded rod 93, a moving shaft 94, a connector 95, a scraper 96, and an electric cylinder 97 located at the bottom inner side of the reaction tank 20. The limiting rod 92 is slidably connected to both sides of the reaction tank 20, and the two limiting rods 92 horizontally position the threaded rod 93 inside the threaded rod 93. One end of the threaded rod 93 near the drive device 91 is connected to the output shaft of the drive device 91. The moving shaft 94 is sleeved on the threaded rod 93. The upper end of the limiting rod 92 is connected to the electric cylinder 97, which is connected to both sides of the reaction tank 20. The scraper 96 is connected to the moving shaft 94 through the connector 95. The scraper 96 is installed perpendicularly to the threaded rod 93, and the bottom of the scraper 96 has a beveled surface 961, which abuts against the inner bottom surface of the reaction tank 20. A drain outlet is provided at the bottom side of the reaction tank 20. The sludge tank 40 is connected to the drain outlet via a drain pipe 41. Therefore, the scraper 96 can be moved by the drive device 91 to remove the sediment at the bottom of the reaction tank 20 into the drain pipe 41 for discharge. In some embodiments, the shape of the beveled surface 961 can be set differently according to the bottom of the reaction tank 20 so that the scraper 96 abuts against the reaction tank 20. At the same time, the controller is also electrically connected to the drive device 91 and the electric cylinder 97 respectively. By controlling the drive device 91 and the electric cylinder 97 through the controller, the drive device 91 can drive the threaded rod 93 to rotate, and the electric cylinder 97 can cooperate with the limit rod 92 to drive the threaded rod 93 to move up and down, thereby driving the scraper 96 to move left and right and up and down, so as to achieve the purpose of cleaning different heights and different parts of the bottom of the reaction tank 20.

[0023] In some embodiments, the non-ferrous metal smelting defluorination equipment further includes a filter tank 100 and a filtered waste acid storage tank 110. The inlet of the activation tank 50 is connected to the defluorinating agent outlet of the reaction tank 20, the inlet of the sedimentation tank 30 is connected to the waste acid outlet of the reaction tank 20, the outlet of the sedimentation tank 30 is connected to the inlet of the filter tank 100, the waste acid outlet of the filter tank 100 is connected to the inlet of the filtered waste acid storage tank 110, and both the defluorinating agent outlets of the filter tank 100 and the activation tank 50 are connected to the defluorinating agent reuse pipeline 120. The defluorinating agent reuse pipeline 120 is connected to the defluorination device of the adsorption reactor. The activation tank 50 contains an activator.

[0024] Working principle: Waste acid passes through equalization tank 10, where its pH is adjusted and it is heated before being pumped to reaction tank 20. Simultaneously, a defluorinating agent is added to reaction tank 20 to react with fluoride ions, forming a sparingly soluble solid. A fluoride ion concentration range is input into the controller. If the fluoride ion concentration detected by the fluoride ion detector is lower than the set range, the controller activates the defluorinating agent dosing pump 81 to automatically add defluorinating agent to reaction tank 20. When the required dosage of defluorinating agent is reached, the controller shuts off the defluorinating agent dosing pump 81. At this point, the input of defluorinating agent and waste acid stops. Then, the drive motor 70 is activated, driving the rotating rod 60 to rotate. Multiple stirring rods 61 and multiple stirring blades 62 also rotate, stirring and mixing the waste acid and defluorinating agent in reaction tank 20 to remove fluoride, thereby accelerating the defluorination efficiency. The defluorinated waste acid is discharged into sedimentation tank 30 through the waste acid outlet at the bottom, and then passes through filter tank 100 to deeply remove residual defluorinating agent. The recovered defluorinating agent is reused, and the defluorinated waste acid is returned to the waste acid system for recycling. Most of the defluorinating agent overflows from the defluorinating agent outlet at the top of adsorption reactor 20 and is collected in activation tank 50. Activator is added to activation tank 50, and the activated defluorinating agent is returned for recycling. After deep enrichment of fluoride wastewater in activation tank 50, solid fluoride salts are obtained through natural crystallization at room temperature under supersaturation. The entire process can be automatically controlled to deeply remove fluoride from waste acid and improve the recycling rate of wastewater. All content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0025] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A defluorination device for non-ferrous metal smelting, characterized in that, It includes an equalization tank (10), a reaction tank (20), a sedimentation tank (30), a sludge tank (40), and an activation tank (50); The equalization tank (10), reaction tank (20), and sedimentation tank (30) are connected in sequence. The reaction tank (20) is also connected to the sludge tank (40) and the activation tank (50) respectively. A rotating rod (60) is provided on the top of the reaction tank (20). The rotating rod (60) extends into the reaction tank (20), and one end extends out of the reaction tank (20) and is connected to the output shaft of the drive motor (70). Multiple stirring rods (61) are provided on the outer surface of the rotating rod (60), and multiple stirring blades (62) are provided on the outer surface of the stirring rods (61). A cleaning device is provided at the bottom of the reaction tank (20). A fluoride ion detector is provided inside the reaction tank (20). A defluorination device and a waste acid outlet are provided at the bottom of the reaction tank (20), and a defluorinating agent outlet and a waste acid inlet are provided at the top. The defluorination device includes a defluorinating agent dosing pump (81) and a defluorinating agent storage tank (82).

2. The defluorination equipment for non-ferrous metal smelting according to claim 1, characterized in that, The cleaning device includes a drive unit (91) located on the outer wall of the reaction tank (20) and a limiting rod (92), a threaded rod (93), a moving shaft (94), a connector (95), a scraper (96), and an electric cylinder (97) located at the bottom of the inner side of the reaction tank (20). The limiting rod (92) is slidably connected to both sides of the reaction tank (20). The two limiting rods (92) horizontally position the threaded rod (93) inside the threaded rod (93). One end of the threaded rod (93) near the drive unit (91) is connected to the output shaft of the drive unit (91). The moving shaft (94) is sleeved on the threaded rod (93). The upper end of the limiting rod (92) is connected to the electric cylinder (97). The electric cylinder (97) is connected to both sides of the reaction tank (20). The scraper (96) is connected to the moving shaft (94) through the connector (95).

3. The defluorination equipment for non-ferrous metal smelting according to claim 2, characterized in that, The scraper (96) is installed perpendicularly to the threaded rod (93). The bottom of the scraper (96) is provided with a beveled surface (961), and the bottom beveled surface (961) of the scraper (96) abuts against the bottom inner side of the reaction tank (20).

4. The defluorination equipment for non-ferrous metal smelting according to claim 1, characterized in that, The reaction tank (20) has a drain outlet at the bottom of its side, and the sludge tank (40) is connected to the drain outlet through a drain pipe (41).

5. The defluorination equipment for non-ferrous metal smelting according to claim 1, characterized in that, It also includes a filter tank (100) and a filtered waste acid storage tank (110). The inlet of the activation tank (50) is connected to the defluorinating agent outlet of the reaction tank (20). The inlet of the sedimentation tank (30) is connected to the waste acid outlet of the reaction tank (20). The outlet of the sedimentation tank (30) is connected to the inlet of the filter tank. The waste acid outlet of the filter tank (100) is connected to the inlet of the filtered waste acid storage tank (110). The defluorinating agent outlets of the filter tank (100) and the activation tank (50) are both connected to the defluorinating agent recycling pipeline (120). The defluorinating agent recycling pipeline (120) is connected to the defluorination device of the adsorption reactor.

6. The defluorination equipment for non-ferrous metal smelting according to claim 1, characterized in that, The activation pool (50) contains an activator.

7. The defluorination equipment for non-ferrous metal smelting according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the fluoride ion detector and the defluorinating agent dosing pump (81), respectively.

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