Iron removal oxidation device with heat exchange function

Abstract

The utility model provides an iron removal oxidation device with a heat exchange function. The iron removal oxidation device comprises a tank body, a stirring device is arranged in the tank body, an aeration system is further arranged in the tank body, a cooling jacket is arranged on the outer side of the tank body, a sedimentation system is arranged at the bottom of the tank body, and a solution online Fe < 3 + > detector is connected to the side wall of the tank body. By means of the accurate stirring system and the cooling jacket, it is ensured that ore dissolving liquid makes full contact with oxidizing gas, the optimal reaction temperature is maintained, and therefore oxidation of Fe < + > is accelerated. The microporous aeration disc enhances the contact area between gas and the ore dissolving liquid, and improves the oxidation rate. Meanwhile, the sedimentation system effectively accelerates the separation of sediments and reduces the interference of impurities. And through Fe < + > concentration monitoring and backflow adjustment, accurate control over the ore dissolving liquid is achieved, and the quality of a final product is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing equipment technology, and in particular to an iron removal and oxidation device with heat exchange function. Background Technology

[0002] In many industrial production processes, such as fine chemicals, high-end materials preparation, and certain mineral processing industries, iron impurities in raw materials can have a serious negative impact on product quality. The presence of iron impurities can not only cause the product to turn yellow or darken, reducing its whiteness, but also affect its physicochemical properties in some cases, such as reducing the material's stability, conductivity, or catalytic activity.

[0003] Traditional iron removal methods often have several limitations. Some physical methods, such as magnetic separation, are ineffective at removing weakly magnetic or non-magnetic iron compounds, making it difficult to achieve deep iron removal and meet production requirements for extremely low iron content. Chemical precipitation, in practical applications, suffers from unstable iron removal efficiency due to interference from solution pH, temperature, and other impurity ions, and it is difficult to precisely control the residual iron content. During the reaction that generates the molten ore solution in the previous step, the temperature of the solution is very high. Furthermore, the oxidation of Fe²⁺ for iron removal is usually accompanied by an exothermic reaction, leading to an increase in the molten ore solution temperature. However, subsequent process steps often have strict requirements on the temperature of the molten ore solution. Excessively high temperatures may trigger side reactions, affecting the crystal morphology, particle size distribution, purity, and stability of the product. Traditional temperature control methods typically require additional complex cooling equipment and cumbersome process flows, which not only increases equipment investment and operating costs but also occupies a significant amount of production space and reduces production efficiency. Therefore, developing a novel device and method that can efficiently oxidize Fe2+ for deep iron removal and effectively control the temperature of the molten mineral solution has significant practical implications and industrial application value. Utility Model Content

[0004] The purpose of this invention is to provide an iron removal oxidation device with heat exchange function. By optimizing the stirring, aeration, temperature control, and sedimentation separation processes in the oxidation reaction, the efficiency of iron ion oxidation is improved, and the rapid separation and sedimentation of precipitates are ensured, thereby improving production efficiency and reducing equipment maintenance costs.

[0005] According to the purpose of this utility model, this utility model provides an iron removal and oxidation device with heat exchange function, including a tank, an internal stirring device, an internal aeration system, a cooling jacket on the outside of the tank, a settling system at the bottom of the tank, and an online Fe solution connection on the side wall of the tank. 3+ Detector.

[0006] Furthermore, the tank body has a hollow cylindrical structure, and the bottom of the tank body has a conical structure.

[0007] Furthermore, the top of the tank is provided with a feed inlet and a vent, and the bottom of the tank is provided with a discharge outlet and a sludge discharge outlet.

[0008] Furthermore, the tank body is provided with an overflow port on its side wall, and the solution is Fe online. 3+ The detector is connected to the overflow port.

[0009] Furthermore, the stirring device includes a stirring shaft and stirring blades, the stirring blades are distributed in multiple layers, and the surface of the stirring blades is densely covered with vertical steel nails.

[0010] Furthermore, the stirring blades are detachably connected to the stirring shaft.

[0011] Furthermore, the aeration system includes an aeration disc, an air supply pipeline, and a gas source. The surface of the aeration disc has tiny air holes, and the aeration disc is connected to the gas source through the air supply pipeline.

[0012] Furthermore, the cooling jacket is equipped with a spiral coil inside, a cooling water inlet is provided at the bottom of the cooling jacket, and a cooling water outlet is provided at the top of the cooling jacket. The cooling water inlet and the cooling water outlet are respectively connected to a cooling medium circulation pipeline.

[0013] Furthermore, the settling system includes a settling wedge assembly and an electromagnetic vibrator. The settling wedge assembly is made of polyvinyl chloride and has an inclination angle of 60°. The electromagnetic vibrator is fixed to the bottom of the tank.

[0014] Furthermore, the sedimentation system is connected to two centrifugal filters via solenoid valves, and the centrifugal filters are connected to the online discharge system via solenoid valves. 3+ Connect the detector.

[0015] This invention significantly improves reaction efficiency and stability by optimizing the oxidation reaction process. A precise stirring system and cooling jacket ensure full contact between the molten mineral solution and the oxidizing gas, maintaining the optimal reaction temperature and thus accelerating the oxidation of Fe2+. Microporous aeration discs enhance the contact area between the gas and the molten mineral solution, increasing the oxidation rate. Simultaneously, the sedimentation system effectively accelerates the separation of precipitates and reduces impurity interference. Precise control of the molten mineral solution is achieved through Fe3+ concentration monitoring and reflux adjustment, ensuring the quality of the final product. This device is easy to operate and maintain, possesses high efficiency and stable production performance, strong adaptability, and can significantly improve the efficiency of the iron ion oxidation process and product quality. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the tank body according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the stirring device according to an embodiment of the present invention;

[0020] Figure 4 This is a top view of the stirring device according to an embodiment of the present invention;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the stirring device according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the aeration system according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the cooling jacket according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the sedimentation system according to an embodiment of the present invention.

[0025] In the diagram, 1-tank body, 11-feed inlet, 12-vent, 13-discharge outlet, 14-overflow outlet, 15-1 # Online Fe 3+ Detector;

[0026] 2-Stirring device, 21-Stirring shaft, 22-Stirring blades, 23-Drive motor, 24-Vertical steel nail;

[0027] 3-Aeration system, 31-Aeration disc, 32-Air supply pipeline, 33-Gas source, 34-Aeration disc support;

[0028] 4-Cooling jacket, 41-Flow guide structure, 42-Cooling water inlet, 43-Cooling water outlet;

[0029] 5-Settling system, 51-Settling wedge assembly, 52-Electromagnetic vibrator, 53-Sludge discharge port, 54-2 # Online Fe 3+Detector. Detailed Implementation

[0030] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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; 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 based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1-8 As shown:

[0035] An iron removal and oxidation device with heat exchange function includes a tank 1. The tank 1 has a hollow internal structure to contain the molten mineral solution and to facilitate oxidation and cooling reactions. The tank 1 is made of a material that is resistant to acids and alkalis, high temperatures, and has good mechanical strength, such as fiberglass or stainless steel lined with anti-corrosion material. The tank 1 is designed to be cylindrical with a conical bottom to facilitate the collection and discharge of sediment.

[0036] The volume of tank 1 is designed according to the actual production scale and processing capacity, ranging from 1 to 100 cubic meters. Its inner wall undergoes a special smoothing treatment to reduce the resistance and wall adhesion of the molten mineral solution during the flow process.

[0037] The top of tank 1 is equipped with a feed inlet 11 for inputting a molten mineral solution containing Fe2+. The feed inlet 11 is connected to a molten mineral solution conveying pipeline and is equipped with a No. 1 flow regulating solenoid valve F1 to regulate the feed flow rate. The initial feed flow rate is precisely set to 0.42 m³ / h using a PLC control system. 3 / h;

[0038] The top of the tank 1 is provided with an exhaust port 12, which is connected to the exhaust gas treatment device to ensure that the discharged gas meets the emission standards.

[0039] A discharge port 13 is located at the bottom of tank 1 near the apex of the cone. This port is used to discharge the treated and appropriately heated molten mineral solution. The discharge port 13 is configured as a spray nozzle, allowing the mixed solution to be evenly sprayed out through the nozzles to prevent disturbance of the sediment at the bottom of the tank. The discharge port 13 is connected to a flow regulating solenoid valve F2 (No. 2) to adjust the flow rate of the mixed solution. Initially, a low flow rate is set to prevent disturbance of the sediment. A sludge discharge port is also located on the side of tank 1 near the bottom to periodically discharge precipitated iron-containing impurities.

[0040] The tank body 1 has an overflow port 14 on its side wall, and the overflow port 14 is connected to the No. 1 online Fe 3+ The detector 15 and centrifugal pump Q1 are used to prepare for subsequent reflux. The Fe 1 online monitoring system is used. 3+ Detector 15, if Fe 3+ If the concentration is below 100 ppm, it should be transferred to the mineral dissolving solution storage tank; if it is above 100 ppm, it should be transferred through 1 # Centrifugal pump Q1 returns the molten ore to the feed inlet 11, at which point adjustment 1... # The flow regulating solenoid valve F1 regulates the flow rate into the feed inlet 11.

[0041] like Figure 2 and Figure 3 As shown, a stirring device 2 is installed inside the tank 1. The stirring device 2 is located on the central axis of the tank 1 and includes a stirring shaft 21 and stirring blades 22. The stirring shaft 21 is made of high-strength alloy steel, and its top is connected to a variable frequency drive motor 23, which can adjust the stirring speed according to the actual process requirements. The drive motor can be precisely adjusted within the range of 0-600 rpm, and the drive motor 23 can drive the stirring shaft 21 to rotate at an adjustable speed.

[0042] A stirring blade 22 is fixed on the stirring shaft 21. The stirring blade 22 adopts a multi-layer design, generally 3-6 layers, with 4-8 blades in each layer. In this embodiment, the stirring blade 22 adopts a three-layer structure, with 4 blades in each layer, and is installed at a specific angle. Vertical steel nails 24 with a diameter of 5mm are evenly distributed on the upper and lower surfaces of the stirring blade 22. This design generates strong axial and radial flow during stirring, creating a complex turbulent state in the molten mineral solution within the tank. This ensures sufficient contact between Fe2+ in the molten mineral solution and the oxidizing gas, accelerating the oxidation reaction and preventing localized overheating. The stirring blade 22 and the stirring shaft 21 are detachably connected by bolts and nuts. Using high-strength bolts allows for easy replacement of stirring blades of different shapes and specifications as needed to adapt to different molten mineral solution properties and processing requirements.

[0043] The tank 1 is equipped with an aeration system 3, which includes an aeration disc 31, an air supply pipe 32, and a gas source 33. The aeration disc 31 is installed at the center of the bottom of the tank 1. The aeration disc 31 is disc-shaped and has numerous tiny pores distributed on its surface. The aeration disc 31 is made of ceramic or stainless steel, and its surface is uniformly covered with a large number of micropores with a diameter between 0.1-0.5 mm. This allows the introduced oxidizing gas to be dispersed into tiny bubbles, increasing the contact area between the gas and the molten mineral solution, and ensuring that the pores are fine and resistant to acid and alkali corrosion.

[0044] The aeration disc 31 is connected to an air compressor as a gas source 33 via an air supply pipe 32. The air supply pipe 32 is made of corrosion-resistant plastic or metal, and its diameter is selected appropriately according to the gas flow rate and tank size. Generally, the main pipe diameter is between 5-20 cm, and the branch pipe diameter is between 1-5 cm. The air supply pipe 32 is equipped with a precise No. 3 flow regulating solenoid valve F3, with an initial air flow rate set to 5 m³ / h. 3 The pressure is 0.3 MPa per hour, ensuring that microbubbles are uniformly and stably dispersed in the molten mineral solution. These microbubbles escape from the pores of the aeration disc 31, forming microbubbles that are uniformly dispersed in the molten mineral solution and react with Fe2+ to form ferric hydroxide precipitate. The aeration disc support 34 is located at the bottom of the aeration disc 31, and the aeration disc 31 is fixed inside the tank 1 by the aeration disc support 34. The aeration disc support 34 is made of stainless steel and is welded to the tank 1 on all four sides.

[0045] The gas source 33 can be air supplied by an air compressor, or it can be an oxygen-enriched air source or a pure oxygen source, depending on actual needs. The gas source 33 is equipped with precise 3 # The flow regulating solenoid valve F3 controls the flow rate and pressure of the gas, allowing the oxidizing gas to escape from the air holes of the aeration disc 31 at a suitable rate and state. It can precisely control the flow rate and pressure of the oxidizing gas to meet the oxidation requirements of Fe2 ore solutions of different concentrations.

[0046] A cooling jacket 4 is provided on the outer side of the tank body 1. The cooling jacket 4 is arranged around the outer wall of the tank body and fits tightly. It is made of layers of coils connected from the outside to the inside, forming a closed cooling channel between the cooling jacket 4 and the side wall of the tank body 1. The cooling jacket 4 is made of a metal material with good thermal conductivity, such as carbon steel or stainless steel, and its thickness is between 5-15 cm to ensure good heat transfer effect. In this embodiment, the cooling jacket 4 is made of copper alloy. The interior of the cooling jacket 4 is provided with spiral coils. The coils guide the cooling medium to flow in a spiral shape within the cooling jacket 4, prolonging the residence time of the cooling medium within the jacket and improving heat exchange efficiency.

[0047] The cooling jacket 4 has an internal guide structure 41 for guiding the flow of cooling water. The guide structure 41 consists of layers of coils connected from the outside to the inside, allowing the cooling water to circulate within the jacket 4 along a predetermined path. The bottom of the cooling jacket 4 has a cooling water inlet 42, and the top has a cooling water outlet 43. The cooling water inlet 42 and the cooling water outlet 43 are respectively connected to a cooling medium circulation pipeline. In this embodiment, the cooling water inlet 42 is connected to a cooling water pump to introduce circulating water, and the cooling water outlet 43 is connected to a cooling tower, forming a circulating cooling loop. The initial cooling water flow rate is set to 2 m / s². 3 The cooling rate is 1000 m / h, and the temperature is 20°C. Water, ethylene glycol aqueous solution, or other suitable coolant are used as the cooling medium, which is circulated in the cooling jacket and piping by a circulating pump.

[0048] The bottom of the tank 1 is equipped with a settling system 5, which includes a settling wedge assembly 51. The settling wedge assembly 51 is made of polyvinyl chloride and has an inclination angle of 60°, which facilitates the rapid settling of ferric hydroxide precipitate. The bottom of the tank 1 is conical, and two electromagnetic vibrators 52 are installed on the side of the bottom of the tank 1. The vibration frequency is set to 30Hz, which can vibrate the ferric hydroxide precipitate adsorbed at the bottom of the tank to the ferric hydroxide discharge port 53.

[0049] Ferric hydroxide discharge port 53 is connected to solenoid valves M3 (#3) and M4 (#4), which respectively supply power to vacuum filter BF1 (#1) and centrifugal filter BF2 (#2). These two systems operate alternately, and the subsequent filtrate passes through online Fe2. 3+ The detector 54 monitors the quality of the filtrate. The filtrate that passes the iron ion test enters the mineral solution storage tank through the No. 2 solenoid valve switch M2.

[0050] The sludge discharge port 53 of ferric hydroxide is connected to 3 # Solenoid valve switch M3 enters vacuum filter BF1 (No. 1) or via solenoid valve switch M4 (No. 4) enters centrifugal filter BF2 (No. 2), then through 5... # Solenoid valve switch M5 or 6 # Solenoid valve switch M6 is connected to online Fe 2# 3+If the iron ion tester (54) passes the test, the molten mineral solution enters the storage tank via solenoid valve M2 (2#). If it fails the test, it enters the storage tank via solenoid valve M2 (2#). # Centrifugal pump Q2 returns to sedimentation system 5 to continue sedimentation.

[0051] Among them, 3 # When the solenoid valve switch M) is open, 4 # Solenoid valve switches M4 and 6 # Solenoid valve switch M6 is closed, otherwise 4 is open. # When solenoid valve switch M4 is opened, 3 # Solenoid valve switches M3 and 5 # With solenoid valve switch M5 closed, vacuum filter BF1 (No. 1) and centrifugal filter BF2 (No. 2) are used alternately; ferric hydroxide product 55 is generated after filtration by the filters.

[0052] In this embodiment, vacuum filter BF1 (1#) or centrifugal filter BF2 (2#) can be not only a vacuum filter, but also a centrifugal filter or a plate and frame filter.

[0053] When using this utility model:

[0054] Turn on the molten mineral transfer pump to deliver the solution containing Fe. 2+ The molten mineral solution is injected into tank 1, the stirring device is started, and the speed of the drive motor is adjusted to 50-300 rpm, so that the molten mineral solution quickly forms a three-dimensional circulation and uniform flow state in the tank. It is observed that the molten mineral solution is uniformly mixed and there is no obvious stratification.

[0055] Simultaneously with the oxidation reaction, the cooling medium circulation system is activated. A circulation pump draws the cooling medium in from the inlet of the cooling jacket. Inside the jacket, the cooling medium flows along a spiral guide plate, absorbing heat transferred from the molten mineral solution to the tank wall before exiting from the outlet. The high-temperature cooling medium then enters a heat exchanger for cooling before circulating back into the cooling jacket. Temperature and flow sensors monitor the cooling medium's temperature and flow rate in real time, feeding the signals back to the control system. The control system automatically adjusts the circulation pump's speed and the heat exchanger's cooling power according to a preset molten mineral solution temperature range, ensuring the molten mineral solution temperature remains within a suitable range for subsequent processing, typically between 20-40°C. This meets the temperature requirements of the subsequent oxidation and precipitation processes, preventing the oxidation reaction from spiraling out of control or altering the properties of the precipitate due to excessively high temperatures.

[0056] The aeration system is activated, and the air compressor operates. The air flow and pressure are precisely controlled via the #3 flow regulating solenoid valve F3, ensuring a stable rate of airflow into the molten mineral solution. Fe 2+ Under the combined effects of stirring and aeration, it undergoes an oxidation reaction with oxygen in the air to produce Fe. 3+This process leads to the formation of ferric hydroxide precipitate, which settles towards the conical region at the bottom of the tank under gravity. Through the transparent viewing window, it can be observed that the bubbles inside the tank are evenly dispersed, and the color of the molten mineral solution gradually changes from light green to brownish-yellow, indicating that the oxidation reaction is proceeding smoothly.

[0057] After the oxidation reaction has proceeded for a period of time, the molten ore solution flows out through the overflow port on the side wall, passing through the Fe 1 line. 3+ The detector detects that when Fe 3+ When the content is below 100ppm, it is directly connected to the molten mineral solution storage tank; if it is above 100ppm, the No. 1 centrifugal pump will start automatically and return the overflow liquid to the molten mineral solution inlet. At the same time, the No. 1 flow regulating solenoid valve will automatically regulate the flow rate into the inlet to realize the recycling of materials and ensure that the quality of the molten mineral solution that finally enters the storage tank meets the standards.

[0058] Ferric hydroxide precipitate in the molten ore solution settles via a settling wedge assembly. An electromagnetic vibrator is periodically activated to ensure the ferric hydroxide precipitate adsorbed at the bottom of the tank passes smoothly through the ferric hydroxide discharge port. When solenoid valve M3 (#3) is opened, the precipitate enters vacuum filter (#1), and the filtrate passes through online Fe2# filter. 3+ If the iron ion level is within acceptable limits, the No. 2 solenoid valve opens, and the filtrate enters the leaching solution storage tank. If the level is not within acceptable limits, the No. 2 centrifugal pump starts, returning the filtrate to the sedimentation system for further settling. The ferric hydroxide product generated by the filter is collected periodically to ensure the normal operation and treatment effect of the oxidation pond.

[0059] This invention features a highly efficient oxidation reaction promoting function. The stirring device is located at the center of the tank, and the stirring blades are multi-layered and uniquely designed, creating complex turbulence in the molten mineral solution. This ensures full contact between the molten mineral solution and the oxidizing gas, accelerating the oxidation reaction process, increasing the efficiency of Fe2+ to Fe3+ oxidation, shortening the reaction time, and improving overall production efficiency. The stirring blades are covered with vertical steel spikes, which, through revolution and rotation, effectively disperse air bubbles, ensuring full contact between Fe2+ in the molten mineral solution and the introduced air. This significantly increases the rate and extent of the oxidation reaction, guaranteeing its complete progress.

[0060] This invention features precise temperature control. The cooling jacket fits tightly against the outer wall of the tank, and its internal flow guiding structure allows the cooling water to circulate along a predetermined path. It can precisely adjust the flow rate and temperature of the cooling medium according to the temperature changes of the molten mineral solution, and stably control the temperature of the molten mineral solution within a predetermined range. This avoids the oxidation reaction and product quality being affected by excessively high or low temperatures, and provides a stable thermal environment for the oxidation process.

[0061] This invention features highly efficient sedimentation and separation. The sedimentation wedge assembly in the sedimentation system facilitates the settling of ferric hydroxide precipitate. The conical design at the bottom of the tank, combined with an electromagnetic vibrator, effectively prevents precipitate from adsorbing to the bottom, ensuring smooth entry of precipitate into the sludge discharge port, thus improving sedimentation and separation efficiency and reducing the impurity burden on subsequent processing steps. The ferric hydroxide sludge discharge port connects to different solenoid valves and filters, with filters #1 and #2 used alternately. This not only facilitates operation and maintenance but also further enhances the filtration effect, ensuring the iron ion content in the filtrate meets standards and improving the quality of the molten mineral solution entering the storage tank.

[0062] This invention features material recycling and quality control functions; the overflow port uses online Fe... 3+ The detector monitors the molten mineral solution in real time and determines whether to reflux it for further treatment based on the iron ion content. This ensures that the quality of the molten mineral solution entering the storage tank remains stable and meets standards, while avoiding material waste and achieving efficient resource utilization. The entire system is designed with each step—from molten mineral solution feeding, oxidation reaction, sedimentation and filtration to discharge—closely integrated to form a highly efficient closed-loop process. This ensures product quality while reducing losses in intermediate stages and lowering production costs.

[0063] This utility model features convenient equipment maintenance. The mixing blades and mixing shaft are detachably connected, facilitating the replacement of worn parts, reducing equipment maintenance difficulty and costs, minimizing downtime due to maintenance, and improving production continuity. The various systems, such as the aeration system and cooling jacket, have a reasonable structural design, and key components are easy to inspect, ensuring long-term stable operation of the equipment.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An iron removal and oxidation device with heat exchange function, characterized in that, The tank includes a stirring device and an aeration system inside. A cooling jacket is located on the outside of the tank, and a settling system is located at the bottom. An online Fe solution is connected to the side wall of the tank. 3+ Detector.

2. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The tank body has a hollow cylindrical structure, and the bottom of the tank body has a conical structure.

3. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The top of the tank is provided with a feed inlet and an exhaust outlet, and the bottom of the tank is provided with a discharge outlet and a sludge discharge outlet.

4. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The tank is provided with an overflow port on its side wall, and the solution is Fe online. 3+ The detector is connected to the overflow port.

5. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The stirring device includes a stirring shaft and stirring blades. The stirring blades are distributed in multiple layers, and the surface of the stirring blades is densely covered with vertical steel nails.

6. The iron removal and oxidation device with heat exchange function according to claim 5, characterized in that... The stirring blades are detachably connected to the stirring shaft.

7. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The aeration system includes an aeration disc, an air supply pipeline, and a gas source. The surface of the aeration disc has tiny air holes, and the aeration disc is connected to the gas source through the air supply pipeline.

8. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The cooling jacket is equipped with a spiral coil inside. The bottom of the cooling jacket is provided with a cooling water inlet, and the top of the cooling jacket is provided with a cooling water outlet. The cooling water inlet and the cooling water outlet are respectively connected to the cooling medium circulation pipeline.

9. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The settling system includes a settling wedge assembly and an electromagnetic vibrator. The settling wedge assembly is made of polyvinyl chloride and has an inclination angle of 60°. The electromagnetic vibrator is fixed to the bottom of the tank.

10. The iron removal and oxidation device with heat exchange function according to claim 1, characterized in that... The sedimentation system is connected to two centrifugal filters via solenoid valves, and the centrifugal filters are connected to the online discharge system via solenoid valves. 3+ Connect the detector.

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