A device for removing iron and impurities from raw materials used in nickel chloride production.

Abstract

This utility model discloses a device for removing iron and impurities from raw materials used in nickel chloride production, comprising a reaction tank, a mixing and aeration assembly, and a flow guide. A motor and an air inlet pipe are installed on the top surface of the reaction tank. The air inlet pipe is connected to an external air pump to guide airflow into the mixing and aeration assembly. The mixing and aeration assembly is fixedly installed inside the reaction tank. The assembly includes a mixing tank and a core cylinder rotatably installed inside the mixing tank. Several parallel flywheels are arranged on the surface of the core cylinder. An inlet hole is opened on the surface of the mixing tank, allowing the raw material liquid to enter the mixing tank under negative pressure and form a high-density aeration mixture with the high-speed rotating components. This utility model can generate strong disturbance, microbubble dispersion, and high dissolved oxygen density in the reaction liquid, improving the Fe... 2+ It boasts a high oxidation rate and iron removal efficiency, a compact overall structure, and stable operation, making it suitable for iron and impurity removal in continuous nickel chloride production.

Description

Technical Field

[0001] This utility model relates to the technical field of nickel chloride production equipment, specifically to a device for removing iron and impurities from raw materials used in nickel chloride production. Background Technology

[0002] Nickel chloride production typically requires the dissolution and purification of nickel hydroxide, nickel carbonate, or recycled nickel as raw materials. These raw material liquids generally contain iron impurities in various forms. To improve the purity of nickel chloride products and meet the stringent iron content requirements of subsequent battery materials, electroplating solutions, or chemical catalytic systems, production lines generally require aeration oxidation to remove Fe. 2+ Oxidized to Fe 3+ Then, iron removal is carried out in conjunction with a precipitant. Therefore, the aeration efficiency directly determines the oxidation reaction rate and is a key factor in the nickel chloride iron and impurity removal process.

[0003] In existing technologies, iron and impurity removal processes generally employ static aerators or bottom-bubbling aeration devices as the primary gas supply method. Typical structural forms include: several microporous aeration discs, aeration stones, or perforated aeration pipes are installed at the bottom of the reaction tank, and air is released from the bottom through an external air pump, allowing bubbles to rise naturally to complete aeration; some devices use coarse bubble aeration heads, releasing a large number of bubbles through larger orifices to enhance liquid agitation; some factories also use bottom annular aeration pipes, straight pipe air distributors, and other structures to increase the gas coverage area. These traditional aerators are all "static" structures, where bubble formation depends entirely on the inlet pressure and the natural resistance of the liquid, and they lack the ability to actively shear the liquid, break bubbles, or enhance gas-liquid mixing.

[0004] However, in the nickel chloride iron removal production environment, the above-mentioned static aeration structure generally has the following shortcomings:

[0005] First, static aerators produce large, unevenly distributed bubbles with limited gas-liquid contact area, resulting in insufficient dissolved oxygen efficiency. 2+ The oxidation rate is relatively slow, and the iron removal reaction time is long.

[0006] Secondly, because bubbles tend to converge and quickly float to the surface of the liquid in an undisturbed upward path, the gas utilization rate is low, and the deep liquid cannot be fully oxygenated, resulting in uneven oxygen concentration distribution in the reaction tank and affecting the iron removal quality.

[0007] Third, existing static aeration devices rely entirely on the buoyancy effect of the airflow itself and do not have the ability to enhance fluid shearing or cavitation, making it difficult to meet the requirements of "high-intensity aeration and high dissolved oxygen density" in the industrial-scale nickel chloride iron removal process.

[0008] In summary, existing static aeration structures are insufficient to meet the requirements of high dissolved oxygen, high mixing efficiency, and continuous and stable aeration in the iron removal process of nickel chloride feedstock. There is an urgent need for a novel aeration structure capable of generating high-speed turbulence within the liquid, dispersing microbubbles, enhancing cavitation, and circulating discharge, in order to improve gas utilization efficiency, accelerate the oxidation reaction, and enhance the stability and processing efficiency of the entire iron and impurity removal process. This invention is proposed based on the aforementioned technological status and problems. Utility Model Content

[0009] This invention aims to solve the technical problems in existing nickel chloride production processes, such as low static aeration efficiency, insufficient dissolved oxygen, inadequate gas-liquid mixing, and slow iron ion oxidation reaction rate. It proposes a device for removing iron and impurities from nickel chloride production raw materials, which can generate high-speed turbulence, disperse microbubbles, and circulate them out within the liquid. By combining high-speed rotating components with an airflow introduction structure, it achieves enhanced aeration, increased dissolved oxygen, and promoted Fe production. 2+ Rapid oxidation is used to improve the efficiency of iron and impurity removal.

[0010] This utility model provides a device for removing iron and impurities from raw materials used in nickel chloride production, comprising a reaction tank, a mixing and aeration assembly, and a flow guide. The reaction tank contains the iron-containing raw material liquid and forms the main space for the aeration reaction. The mixing and aeration assembly is located inside the reaction tank and achieves aeration and enhanced mixing of the raw material liquid through a high-speed rotating structure and an airflow introduction structure. The flow guide stably discharges the mixed liquid in a swirling manner, thus forming a continuous circulating aeration process. In practical applications, this structure can significantly improve the dispersion of bubbles in the liquid, increase the mass transfer rate of oxygen in the solution, and make the iron removal oxidation reaction more complete and faster.

[0011] In a preferred embodiment, the present invention is further configured as follows: a motor and an air inlet pipe are installed on the top surface of the reaction tank, the air inlet pipe is connected to an external air pump, and is used to continuously introduce airflow into the interior of the mixing aeration component; the mixing aeration component is fixedly installed inside the reaction tank, including a mixing tank and a core cylinder rotatably installed inside the mixing tank; the surface of the core cylinder is provided with several parallel flywheel discs; the top of the guide is connected to the bottom surface of the mixing tank, and is used to guide the mixed liquid formed inside the mixing aeration component out through a swirling path.

[0012] Specifically, it creates a high-density aeration environment in the raw material liquid under strong shear, high flow rate and multi-stage disturbance, thereby improving dissolved oxygen efficiency and accelerating the iron ion oxidation reaction.

[0013] In a preferred embodiment, the present invention is further configured such that: the surface of the mixing tank is provided with a plurality of liquid inlet holes, and the mixing tank is arranged below the liquid surface in the inner cavity of the reaction tank. The raw material liquid inside the reaction tank automatically enters the mixing tank through the liquid inlet holes under the negative pressure suction force formed in the mixing zone.

[0014] Specifically, it enables the raw material liquid to continuously enter the mixing zone without additional external force, improving mixing efficiency and ensuring a continuous and stable gas-liquid exchange process.

[0015] In a preferred embodiment, the present invention is further configured such that: the top end of the core tube is fixedly connected to the output end of the motor, the core tube is in the shape of a thin disc, and its outer surface is smooth and glossy, so as to reduce the fluid friction resistance during high-speed rotation and make the radial flow field formed by rotation more uniform.

[0016] Specifically, it enables the core cylinder to generate a stable accelerated liquid flow during high-speed operation, thereby increasing the intensity of liquid disturbance and enhancing the bubble breaking effect.

[0017] In a preferred embodiment, the present invention is further configured such that: the surface of the core cylinder has a plurality of through holes located between adjacent flywheel discs, so that the liquid flow inside the mixing tank enters the inner side of the core cylinder through the through holes under the action of the low-pressure zone, and is again subjected to the disturbance and shearing of the high-speed rotating component.

[0018] Specifically, it further enhances the degree of gas-liquid mixing, realizes a multi-stage bubble breaking and re-bubble formation cycle, and improves oxygen mass transfer efficiency.

[0019] In a preferred embodiment, the present invention is further configured such that: a dynamic seal is fitted onto the outer surface of the core cylinder, and the core cylinder forms a rotatable connection with the bottom surface of the inner cavity of the mixing tank, so as to maintain the sealing of the inside of the mixing tank, so that the liquid will not leak out when rotating at high speed, while maintaining the pressure stability in the mixing zone.

[0020] Specifically, it makes the high-speed flow field inside the mixing tank more concentrated, improving cavitation formation conditions and gas-liquid exchange efficiency.

[0021] In a preferred embodiment, the present invention is further configured such that: the flow guide includes an outer cylinder and a spiral blade disk fixedly installed inside the outer cylinder, the spiral blade disk guiding the mixed liquid flow so that it is stably discharged from the reaction zone in a spiral path to form a circulation.

[0022] Specifically, this ensures that the liquid after mixing and aeration can circulate continuously, improves the uniformity of aeration in the system, and accelerates the oxidation and precipitation reaction of iron ions.

[0023] The beneficial effects achieved by this utility model are as follows:

[0024] 1. In this invention, the high-speed rotation of the core cylinder driven by the motor and the flywheel creates disturbance, causing the raw material liquid inside the mixing tank to generate a large number of micro-scale cavitation bubbles under strong shear and low-pressure conditions. These bubbles are then fully mixed with the airflow introduced through the air inlet pipe, significantly improving the exchange efficiency of the gas-liquid interface. In the process of removing iron and impurities from nickel chloride raw materials, this high-density aeration environment can rapidly increase the dissolved oxygen content of the solution, promoting the removal of Fe... 2+ Accelerate oxidation to Fe 3+This significantly shortens the iron removal reaction time, improves the iron removal effect, and solves the problems of insufficient dissolved oxygen, uneven bubble distribution, and long reaction time in traditional aeration methods.

[0025] 2. In this invention, the mixing tank is equipped with a liquid inlet, allowing the liquid inside the reaction tank to automatically enter the mixing zone under negative pressure. The flywheel disc on the surface of the core cylinder and the internal through-holes together form a multi-stage fluid breaking path, enabling the liquid to undergo multiple suction, shearing, bubble breaking, and re-bubbling within the mixing tank and core cylinder. Simultaneously, a spiral blade disc is arranged inside the guide to stably guide the mixed liquid flow, enabling continuous circulation of the aerated treatment liquid. This circulating aeration structure improves gas utilization, enhances overall mixing uniformity, and effectively promotes the continuous progress of the oxidation precipitation reaction, giving the device advantages such as high aeration efficiency, stable operation, compact structure, and adaptability to continuous iron removal processes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of a reaction vessel according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of a hybrid aeration component and a secondary aeration component according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of a hybrid aeration component according to an embodiment of the present invention.

[0030] Figure label:

[0031] 100. Reaction vessel; 110. Motor; 120. Inlet pipe;

[0032] 200. Mixing aeration component; 210. Mixing tank; 220. Core cylinder; 230. Flywheel disc; 211. Liquid inlet;

[0033] 300. Drainage device. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0035] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0036] The following describes, with reference to the accompanying drawings, some embodiments of a nickel chloride production raw material iron and impurity removal device.

[0037] Combination Figures 1-4 As shown, this utility model provides an iron and impurity removal device for nickel chloride production raw materials, including a reaction tank 100, a mixing and aeration assembly 200, and a flow guide 300. The overall structure achieves enhanced aeration, mixing, and iron removal treatment of the nickel chloride raw material liquid through power drive, gas-liquid mixing, and cyclone discharge.

[0038] In this embodiment, a motor 110 and an air inlet pipe 120 are installed on the top surface of the reaction tank 100. The air inlet pipe 120 is connected to an external air pump and is used to continuously introduce airflow into the interior of the mixing and aeration assembly 200 during device operation. The reaction tank 100 is a closed pressure-bearing structure, and its interior is used to contain iron-containing nickel chloride raw material liquid, which can provide a stable fluid environment for the aeration and mixing process.

[0039] The mixing aeration assembly 200 is fixedly installed in the inner cavity of the reaction tank 100. The mixing aeration assembly 200 includes a mixing tank 210 and a core cylinder 220 rotatably installed inside the mixing tank 210. In this embodiment, the mixing tank 210 is located below the liquid surface inside the reaction tank 100, and its upper surface has several evenly distributed liquid inlet holes 211, so that the raw material liquid inside the reaction tank 100 can enter the inner cavity of the mixing tank 210 through the liquid inlet holes 211, thereby generating fluid exchange and disturbance with the high-speed rotating components inside the mixing tank 210, and improving the gas-liquid mixing efficiency.

[0040] The top of the core cylinder 220 is fixedly connected to the output end of the motor 110, enabling the motor 110 to drive the core cylinder 220 to rotate at high speed. The core cylinder 220 has a thin, disc-shaped structure with a smooth outer surface to ensure reduced fluid resistance and the formation of a stable axial and radial flow field during high-speed rotation. Several flywheel discs 230 are spaced circumferentially along the surface of the core cylinder 220. These flywheel discs 230 are arranged in parallel and, during rotation, create shearing, suction, and localized negative pressure environments on the liquid, causing microbubble breakage, bubble dispersion, and localized cavitation within the mixing tank 210, thereby significantly increasing the aeration density of the raw material liquid.

[0041] In this embodiment, the surface of the core cylinder 220 is also provided with several through holes located between adjacent flywheel discs 230, allowing the liquid inside the mixing tank 210 to enter the inner side of the core cylinder 220 through the through holes under the action of rotational negative pressure, further enhancing the axial mixing capacity inside the core cylinder 220, thereby improving the gas-liquid contact area. A dynamic seal is fitted onto the outer surface of the core cylinder 220, forming a sealing fit with the rotating position of the bottom surface of the mixing tank 210's inner cavity, thereby preventing lateral leakage when the core cylinder 220 rotates at high speed and maintaining stable internal pressure and swirling effect inside the mixing tank 210.

[0042] The bottom of the mixing tank 210 is connected to the top of the guide device 300, allowing the high-speed mixed liquid flow generated in the mixing aeration assembly 200 to be directly introduced into the inner cavity of the guide device 300. The guide device 300 includes an outer cylinder and a spiral blade plate fixedly installed inside the outer cylinder. The spiral blade plate is used to stably discharge the swirling flow inside the mixing tank 210 along a spiral path, forming a continuous discharge flow, improving the axial conveying efficiency of the mixed liquid flow, reducing bubble bursting caused by turbulence, and ensuring that the aeration effect is maintained in the discharge channel.

[0043] In this embodiment, the operator first adds the iron-containing nickel chloride raw material liquid to be treated into the reaction tank 100, and then starts the external air pump, causing the airflow to enter the mixing and aeration assembly 200 through the air inlet pipe 120. After the motor 110 starts, the core cylinder 220 and the flywheel 230 rotate synchronously at high speed, forming a strong turbulent flow field, causing the raw material liquid to enter the mixing tank 210 through the liquid inlet 211 and mix with the microbubbles generated by the rotation of the core cylinder 220. When the mixed liquid flows through the bottom of the mixing tank 210 and enters the guide 300, it is stably discharged along the spiral path under the guidance of the spiral blade disk, making the distribution of bubbles in the raw material liquid more uniform, thereby achieving the purpose of enhancing aeration, mixing, and promoting the oxidation and sedimentation of iron impurities. After the aeration and mixing treatment is completed, the operator turns off the motor 110 and the air pump, and finally discharges the treated liquid through the outlet.

[0044] Working principle and usage process of this utility model:

[0045] In the iron and impurity removal process of nickel chloride production, Fe 2+ It needs to be oxidized to Fe under an aerated environment. 3+ Furthermore, it forms precipitates with additives, and the aeration efficiency directly determines the iron removal reaction rate. The high-turbulence zone formed by the high-speed rotation of the inner core cylinder 220 not only improves the dissolution efficiency of the airflow in the liquid but also accelerates the diffusion of oxygen in the solution, making the oxidation reaction more complete. After the gas-containing liquid flows into the inner core cylinder 220 through the through holes, it is dispersed again under the impetus of the axial flow field, further improving the dissolved oxygen content and bubble uniformity. The bottom of the mixing tank 210 is connected to the guide device 300. The mixed liquid flow is stably discharged along the spiral path under the guidance of the spiral blade disk in the guide device 300, ensuring that the aerated liquid can continuously circulate back to the reaction tank 100, so that oxygen is continuously replenished and the oxidation reaction of iron impurities continues, thereby forming a continuous and efficient aeration cycle.

[0046] Specifically, after the external air pump starts supplying air, the air inlet pipe 120 continuously introduces the airflow into the mixing aeration assembly 200 arranged inside the reaction tank 100. The motor 110 starts and drives the core cylinder 220 and several flywheel discs 230 on its surface to rotate at high speed. The raw material liquid outside the mixing tank 210 is introduced into the mixing tank 210 through the liquid inlet hole 211 under the negative pressure suction. During the high-speed rotation, the flywheel disc 230 significantly increases its circumferential water flow velocity, causing the local static pressure to drop and generating a microscale cavitation effect in the area near the disc surface. This causes the water liquid to be torn into high-density microbubbles. The microbubbles are further broken into finer aeration particles in the high-speed turbulent field, and mixed with the airflow entering from the air inlet pipe 120 to form a strongly disturbed gas-liquid aeration mixed flow. This mixed flow enters the guide device 300 through the bottom of the mixing tank 210. Under the guidance of the spiral blade disc inside the guide device 300, it is stably discharged from the reaction area along the spiral path, forming a continuous and controllable swirling discharge. Throughout the process, the operator sequentially completes the following steps: adding iron-containing raw material liquid to the reaction tank 100, turning on the air pump and motor 110, maintaining the aeration and mixing treatment time, observing the clarity of the mixed flow at the discharge outlet or the reduction of iron impurities, and finally turning off the motor and air pump and discharging the treated liquid. This achieves enhanced iron removal and mixed aeration purification treatment of iron impurities in the raw materials for nickel chloride production.

[0047] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for removing iron and impurities from raw materials used in nickel chloride production, characterized in that, include: The reaction vessel (100), the mixing and aeration assembly (200), and the guide (300) are included. The top surface of the reaction tank (100) is provided with a motor (110) and an air inlet pipe (120), the air inlet pipe (120) being used to connect to an external air pump to introduce airflow into the interior of the mixing aeration assembly (200); The mixing aeration assembly (200) is fixedly installed inside the reaction tank (100). The mixing aeration assembly (200) includes a mixing tank (210) and a core cylinder (220) rotatably installed inside the mixing tank (210). The surface of the core cylinder (220) is provided with a plurality of parallel flywheel discs (230). The top end of the guide (300) is connected to the bottom surface of the mixing tank (210) for swirling out the mixed liquid flow inside the mixing aeration assembly (200).

2. The iron and impurity removal device for nickel chloride production raw materials according to claim 1, characterized in that, The surface of the mixing tank (210) is provided with a plurality of liquid inlet holes (211), and the mixing tank (210) is arranged below the liquid surface in the inner cavity of the reaction tank body (100). Liquid flow is introduced into the interior of the mixing tank (210) through the liquid inlet holes (211).

3. The iron and impurity removal device for nickel chloride production raw materials according to claim 1, characterized in that, The top end of the core cylinder (220) is fixedly connected to the output end of the motor (110). The core cylinder (220) is in the shape of a thin disc, and the surface of the core cylinder (220) is smooth and glossy.

4. The iron and impurity removal device for nickel chloride production raw materials according to claim 1, characterized in that, The core cylinder (220) has several through holes located between adjacent flywheel discs (230) on its surface, which are used to guide the liquid flow inside the mixing tank (210) into the inner side of the core cylinder (220).

5. The iron and impurity removal device for nickel chloride production raw materials according to claim 1, characterized in that, The core cylinder (220) is fitted with a dynamic seal on its surface, and the core cylinder (220) is rotatably connected to the bottom surface of the inner cavity of the mixing tank (210).

6. The iron and impurity removal device for nickel chloride production raw materials according to claim 1, characterized in that, The diverter (300) includes an outer cylinder and a spiral blade plate fixedly installed inside the outer cylinder for diverting the swirling flow of the mixed liquid.

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