A highly efficient decalcification equipment for nickel-cobalt high calcium leaching solution

Abstract

The present invention relates to the field of calcium ion separation in nickel-cobalt leachate, and provides a high-efficiency calcium removal device for nickel-cobalt high-calcium leachate, including a base; a main body shell, which is vertically arranged on the upper part of the base, and both upper and lower ends are opened; a machine cover, which is installed on the main body shell, and the upper port of the main body shell is closed in the machine cover; a split film falling mechanism, which is arranged on the machine cover; and a frame, which is fixedly arranged inside the main body shell. The present invention integrates water cooling and air cooling technology to achieve efficient synchronous cooling of the leachate, shorten the calcium crystallization process, and does not need to rely on precipitation crystallization equipment with large tank storage. Moreover, this process supports online operation, which not only greatly reduces the cost of calcium reduction of the leachate, but also eliminates the precipitant filtering step, effectively avoids the risk of secondary pollution, and achieves the dual optimization of environmental protection and economy.

Description

Technical Field

[0001] The invention relates to the field of calcium ion separation in nickel-cobalt leaching solution, and in particular to a high-efficiency calcium removal device for nickel-cobalt high-calcium leaching solution. Background Art

[0002] Nickel and cobalt are important metal elements in the preparation of precursor materials. During the leaching process of nickel-cobalt ore, due to the high abundance of calcium in the earth's crust (content is about 4-5%), the leaching solution often contains a large amount of calcium sulfate.

[0003] As the temperature decreases, the calcium sulfate originally dissolved in the leachate will gradually reach a supersaturated state and crystallize out. These crystals will not only form thick scale on the outer wall of the heating coil in the evaporation and concentration section, seriously affecting production efficiency, but will also deposit on the electrode plates, conveying pipelines and filter cloths, leading to pipeline blockage, reduced filtration efficiency, and increased electrolytic cell voltage. These problems not only increase production costs, but may also interrupt the entire production process, seriously affecting the company's economic benefits and product quality.

[0004] At present, all wet process manufacturers do not have a unified and efficient way to solve the problem of decalcification of high-calcium nickel-cobalt leachate. Most of them are properly inhibited through the leaching process, including fluoride decalcification, extraction decalcification, resin adsorption decalcification, seed decalcification, etc. These methods have their own advantages and disadvantages, but in actual applications, there are often problems such as large consumption of precipitants, long reaction time, high cost, and poor filtration performance, which are difficult to apply on a large scale in industrial applications, especially the fluoride decalcification method. Although the decalcification effect is good, the generated calcium fluoride precipitate has poor filtration performance, and the use of fluoride may have a certain impact on the environment. Some adopt the method of adding a liquid tank to cache the high-calcium leachate during the leachate transmission, and concentrate on reducing the temperature to reduce the calcium content. However, this type of treatment method is inefficient and has the problem of reducing the input-output ratio due to the increase of large-capacity product tank storage.

[0005] In view of this, it is particularly important to develop an efficient, economical and environmentally friendly decalcification equipment for nickel-cobalt high calcium leaching solution. The equipment should be able to reduce production costs and environmental pollution while ensuring decalcification efficiency, and meet the needs of large-scale industrial production. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a high-efficiency calcium removal device for nickel-cobalt high-calcium leaching solution.

[0007] The technical implementation scheme of the present invention is as follows: a high-efficiency decalcification device for nickel-cobalt high-calcium leaching solution, comprising a base; a main body shell, which is vertically arranged on the upper part of the base, and has openings at both ends; a machine cover, which is installed on the main body shell, and the upper port of the main body shell is sealed inside the machine cover; a split-flow falling film mechanism, which is arranged on the machine cover; a frame, which is fixedly arranged inside the main body shell; a liquid cooling part, which is installed on the inner side of the frame, and is composed of a box-shaped channel and a plurality of evenly distributed fins, and the left and right sides of the liquid cooling part are provided with circulation pipes, and the two circulation pipes are both connected from the inner wall of the main body shell on the same side. Passing outward, the fins of the liquid cooling component separate a number of falling film chambers in the frame, the frame and the interior of the liquid cooling component are both hollow, and the internal spaces of the two are interconnected; an air inlet pipe is passed through the base, and an air duct is provided on the base, and the air inlet pipe is connected with the internal space of the base through the air duct; an air collecting hood is symmetrically arranged on the top of the machine cover, its interior is connected with the internal space of the machine cover, and an exhaust port is provided on the top; a receiving bucket is fixedly arranged in the lower part of the base; a slag discharge pipe is horizontally and transversely passed through one side of the lower part of the receiving bucket, and one end of the slag discharge pipe passes outward from the base.

[0008] Optionally, the diverter falling film mechanism includes a main pipe, which is horizontally arranged in the machine cover, and its left and right ends are closed; a liquid inlet pipe, which is vertically penetrated in a relatively central position on one side of the upper part of the main pipe; diverter branches, which are evenly and symmetrically arranged on the front and rear sides of the main pipe, and the number of which is consistent with the number of the falling film chambers, and the diverter branches are arranged in a one-to-one correspondence with the falling film chambers in upper and lower positions. One end of the diverter branch is closed, and a plurality of drainage holes are arranged at intervals in the lower part; the flow of the leachate is from the The liquid inlet pipe discharges into the main pipe, and flows from the main pipe to the branch pipe, and flows downward from the drainage hole of the branch pipe; the guide pipe is arranged at the lower part of the branch pipe; the diffuser cone block is installed at the lower part of the guide pipe, and the liquid discharged downward from the branch pipe falls evenly on the top of the diffuser cone block. Under the guidance of the geometric shape of the diffuser cone block, the liquid sliding down along the surface of the diffuser cone block can be evenly dispersed to the cavity surface of the falling film cavity, and then flows downward along the cavity surface in the falling film cavity.

[0009] Optionally, the connection interfaces between the base and the main shell, and between the main shell and the machine cover, all adopt a labyrinth sealing structure with a quick-release and quick-install design to achieve tight and flexible assembly.

[0010] Optionally, it further includes an air storage tank, which is arranged on the main body housing. There are two of them, respectively arranged on the front and rear sides of the main body housing. Air inlet holes and air outlet holes are opened on the left and right sides of its top; an air inlet pipe, which is installed on the upper part of the air collection hood. There are two independent air inlet pipes arranged at the upper end of the air collection hood, and each is reliably docked with the air inlet hole of the corresponding one of the container boxes; a baffle plate, which is installed at one end of the air storage tank close to the air inlet hole. The whole is in an "L" shape. A C-shaped plate is transversely and staggeredly arranged in the air storage tank. Among them, one of the C-shaped plates relatively close to the air inlet hole is connected to the baffle plate. One side of the C-shaped plate relatively far from the baffle plate partitions the internal space of the air storage tank. A ventilation hole is opened on one side wall of this C-shaped plate. A continuously turning air flow path is formed in the air storage tank through the baffle plate and the C-shaped plate; a separation plate, which is installed on the C-shaped plate relatively far from the baffle plate. A number of air holes are evenly opened on it. The separation plate is inclined. Its lower end is close to the ventilation hole. The separation plate divides the space separated by the C-shaped plate into upper and lower parts; an exhaust pipe, which is vertically installed at the air outlet hole of the air storage tank; a demister, which is installed in the lower part of the exhaust pipe; a liquid flow pipe, which is arranged at the bottom of the air storage tank and is located below the separation plate.

[0011] Optionally, the bottom of the air storage tank is inclined, and its lowest end is arranged close to the liquid flow pipe. Liquid flow holes are opened at the lower parts of the C-shaped plates.

[0012] Optionally, it further includes a top cover, which is slidably arranged at the air outlet hole to close the air outlet hole; a spring, which is installed under the top cover. The number of springs is not less than three, and they are evenly spaced on the top cover. The other end of the spring is connected to the air storage tank.

[0013] Optionally, it further includes a housing, which is fixedly arranged on the machine cover; an input pipe, which is arranged at one end of the housing; a mixing tank, which is fixedly arranged at the other end of the housing. Its upper part is closed by the housing; a liquid distribution pipe, which is installed on the input pipe and is communicated with the input pipe. It has not less than three pipelines, and the liquid distribution pipe has not less than three liquid outlet ports. One end of the liquid outlet port of the liquid distribution pipe penetrates into the mixing tank. The liquid discharged from the liquid outlet port forms a convection in the mixing tank. The lower part of the mixing tank is connected and communicated with the upper end pipe orifice of the liquid inlet pipe; a flow dividing block, which is arranged in the mixing tank.

[0014] Optionally, it further includes a vibration module, which is installed on the side wall of the frame. A maintenance window is opened on the main body housing corresponding to the installation area; a protective shell, which is assembled at the maintenance window to protect the vibration module.

[0015] Optionally, a temperature detector is also included, which is installed on the main pipe and the slag discharge pipe, and its detection probes are inserted into the interior of the pipe to accurately measure the temperature inside the pipe.

[0016] Optionally, it also includes a ventilation pipe, which is arranged in the air duct and connected to the air inlet pipe; a guide plate, which is provided in multiple pieces and is integrated and multi-directionally arranged in the ventilation pipe, and the multiple guide plates are arranged in various directions to guide the airflow penetrating into the air inlet pipe.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention integrates water cooling and air cooling technologies to achieve efficient and synchronous cooling of the leachate, shortening the calcium crystallization process. Moreover, this process supports online operation and does not rely on precipitation and crystallization equipment with large tank storage. It not only greatly reduces the cost of calcium reduction in the leachate, but also eliminates the precipitant filtration step, effectively avoiding the risk of secondary pollution, and achieving dual optimization of environmental protection and economy.

[0019] 2. The present invention sets specific structures and components to guide the liquid to flow downward on the surface of the liquid cooling part in the form of a liquid film, thereby increasing the contact area between the cooling part and the leaching liquid. At the same time, the surface of the liquid cooling part is continuously flushed by the flowing liquid, effectively avoiding the scaling of the decalcification equipment, ensuring the use effect of the equipment, and reducing the cleaning frequency.

[0020] 3. The present invention sets a liquid flow mixing mechanism at the liquid inlet pipe of the equipment, which can dynamically control the leachate introduced into the equipment to a certain extent without external power, thereby achieving instantaneous and uniform mixing of materials, avoiding uneven distribution of components, and ensuring the homogeneity of the product. Liquid flow mixing can effectively reduce the phenomenon of local overheating, making the temperature of the liquid discharged from all branch pipes more uniform, which is conducive to maintaining the most suitable temperature range for calcium salt crystallization and improving calcium removal efficiency.

[0021] 4. The present invention uses a separation mechanism provided at the air outlet of the air-cooling airflow of the equipment to accurately capture and recover tiny droplets discharged with the airflow, thereby greatly reducing the loss of leachate caused by airflow carryover. Through the refined gas-liquid separation mechanism, it not only improves resource utilization and reduces material waste, but also maintains the cleanliness of the working environment, avoids potential environmental pollution problems, and further optimizes the closed cycle efficiency of the entire equipment.

[0022] 5. The present invention monitors the temperature of the liquid inlet and outlet of the equipment online by arranging thermometers at the liquid inlet and outlet pipes, and links the thermometer with the power pump and fan of the liquid circulation component to achieve real-time adjustment of the liquid inlet and outlet volume of the liquid cooling component and the air volume of the air duct according to the feedback temperature information, thereby stably controlling the temperature range in the equipment to be optimal, reducing production energy consumption and reducing labor input. Brief Description of the Drawings

[0023] Figure 1 This is a three-dimensional structure schematic diagram of the present invention.

[0024] Figure 2 This is a three-dimensional structure schematic diagram of the present invention with the mixing mechanism and the separation mechanism hidden.

[0025] Figure 3 This is an exploded view of the present invention with the mixing mechanism and the separation mechanism hidden.

[0026] Figure 4 This is a three-dimensional structure schematic diagram of the liquid cooling mechanism and the shunt falling film mechanism of the present invention.

[0027] Figure 5 This is a cross-sectional view of the shunt branch pipe, the diversion pipe and the diffuser cone block of the present invention.

[0028] Figure 6 This is a three-dimensional structure schematic diagram of components such as the receiving hopper, the slag discharge pipe and the ventilation pipe of the present invention.

[0029] Figure 7 This is a three-dimensional structure schematic diagram of the ventilation pipe and the deflector of the present invention.

[0030] Figure 8 This is the first cross-sectional view of the separation mechanism of the present invention.

[0031] Fig. 9 This is a three-dimensional structure schematic diagram of the rightmost C-shaped plate and the separation plate of the present invention.

[0032] Fig.10 This is the second cross-sectional view of the separation mechanism of the present invention.

[0033] Fig.11 This is a cross-sectional view of the exhaust pipe and the demister of the present invention.

[0034] Fig.12 This is an exploded view of the mixing mechanism of the present invention.

[0035] Fig.13 This is a top view of some components of the mixing mechanism of the present invention.

[0036] In the reference numerals:

[0037] 1. Base, 2. Main body housing, 3. Machine cover, 4. Frame, 41. Liquid cooling part, 42. Falling film chamber, 5. Air inlet pipe, 51. Air duct, 52. Air collecting hood, 6. Receiving hopper, 61. Slag discharge pipe;

[0038] 7. Liquid inlet pipe, 71. Main pipe, 72. Shunt branch pipe, 73. Diversion pipe, 74. Diffuser cone block;

[0039] 8. gas container, 81. air inlet pipe, 82. baffle plate, 83. shaped plate, 84. separation plate, 85. exhaust pipe, 86. liquid flow hole, 87. demister, 88. liquid flow pipe;

[0040] 9. cover shell, 91. inlet pipe, 92. mixing tank, 93. liquid dispensing pipe, 94. diverter block;

[0041] 10. Top cover, 101. Spring;

[0042] 11. Vibration module;

[0043] 111. Protective shell;

[0044] 12. Thermometer;

[0045] 13. Ventilation duct, 131. Guide plate. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The present invention discloses a highly efficient calcium removal device for nickel-cobalt high calcium leaching solution, such as Figure 1-6As shown, it includes a base 1, a main body shell 2 is clamped on the inner side of the upper part of the base 1, and the main body shell 2 is vertically arranged on the upper part of the base 1, and both the upper and lower ends thereof are opened; a cover 3 is clamped on the upper part of the main body shell 2, and the cover 3 completely seals the upper port of the main body shell 2. In order to ensure that the device can effectively maintain a stable temperature during operation, the base 1, the main body shell 2 and the cover 3 are all made of materials with good thermal insulation performance. At the same time, in order to achieve rapid maintenance and assembly operations and reduce the disassembly and assembly time during equipment maintenance, a labyrinth sealing structure with a quick-disassembly and quick-assembly design is adopted in the connection area between the base 1 and the main body shell 2, and between the main body shell 2 and the cover 3. The sealing structure at the connection is characterized by its multi-level staggered paths, which effectively blocks the intrusion of external dust and moisture, and prevents the liquid inside the device from penetrating out of the device through the gap at the connection. By docking the three in sequence according to the preset installation method, a tight and flexible assembly is achieved, so that a vertically through square processing cavity is formed inside the base 1, the main body shell 2 and the cover 3;

[0049] like Figure 3 and Figure 4 As shown, a liquid cooling component is installed in the main shell 2, and the liquid cooling component includes a frame 4 and a liquid cooling part 41 vertically installed in the frame 4. The liquid cooling part 41 has a box-shaped channel and a plurality of evenly distributed fins connected to the box-shaped channel. The fins are spaced apart from each other to form a plurality of vacancies with moderate sizes and gaps. These vacancies are neatly arranged and surrounded by the frame 4 to form a plurality of falling film cavities 42 that allow liquid to flow through. The cavity surface of the falling film cavity 42 is relatively smooth, and when the liquid flows through, it is less affected by the medium and shape of the liquid itself. The liquid cooling element 41 and the inner wall of the frame 4 are both made of thin metal sheets with good thermal conductivity. The special shape of the liquid cooling element 41 increases the contact area with the liquid. The liquid cooling element 41 and the frame 4 are both hollow, and the frame 4 is connected to the space inside the liquid cooling element 41. The left and right sides of the liquid cooling element 41 are installed and connected with circulation pipes. The circulation pipes are used to connect to external liquid cooling circulation equipment, so that the external cooling liquid enters the liquid cooling element 41 and fills the internal space of the liquid cooling element 41 and the frame 4, so as to realize the continuous flow and circulation of the cooling liquid.

[0050] like Figure 1-5 As shown, the cover 3 is provided with a split-flow falling film mechanism, which is mainly used to introduce the external leaching liquid that needs to be decalcified into the equipment and evenly disperse the material so that the material can flow from top to bottom through the liquid cooling part 41, and in this process, the leaching liquid is fully in contact with the surface of the liquid cooling part 41;

[0051] Among them, the diversion falling film mechanism includes a main pipe 71 which is horizontally arranged in the machine cover 3 and is closed at both ends. A liquid inlet pipe 7 is vertically arranged in the center of one side of the top of the main pipe 71. The liquid inlet pipe 7 is connected to the inside of the main pipe 71. The liquid inlet pipe 7 connects the leaching liquid that needs to be decalcified outside the equipment to the main pipe 71 through the delivery pump body. A number of diversion branches 72 are arranged on the front and back sides of the main pipe 71. The number of the diversion branches 72 is consistent with the falling film cavity 42, and they are configured in a one-to-one correspondence between the upper and lower positions. One end of the diversion branch pipe 72 is closed, and a number of drainage holes are arranged at intervals in the lower part. The size and number of the drainage holes are controlled to adjust the flow rate. The flow rate and flow rate of the liquid during discharge are controlled. The liquid discharge amount of the branch pipe 72 should be slightly less than the input flow rate of the liquid inlet pipe 7. The liquid entering the main pipe 71 at the initial stage of processing will fill the branch pipe 72 in a relatively short time. The lower part of the branch pipe 72 is provided with a frame-shaped guide pipe 73, and the lower part of the guide pipe 73 is fixedly connected with a diffuser cone block 74. The diffuser cone block 74 is designed as a cone with a small top and a large bottom. The inclination angles of the four cone surfaces are set to the angle of maximizing the reduction of fluid resistance, and the reduction amount of the liquid flow barrier area at the connection point between the guide pipes 73 is not more than 3% of the main cross-sectional area of ​​the guide pipe 73, so as to avoid The connection parts are not required to block the liquid flow, so as to ensure the high efficiency of fluid circulation. The liquid discharged downward from the drainage hole of the branch pipe 72 evenly falls on the top of the diffuser cone block 74. The guide pipe 73 acts on the liquid when it is discharged to block the splashing liquid, so that the liquid can only flow out after passing through the surface of the diffuser cone block 74. Under the guidance of the geometric shape of the diffuser cone block 74, the liquid is dispersed in four directions at the edge. The diffuser cone blocks 74 occupy specific relative positions in the predetermined layout or array, so as to ensure that the falling film formed on the diffuser cone block 74 interacts with the falling film cavity 42, so as to ensure that the liquid falling from the surface of the diffuser cone block 74 can The liquid is evenly dispersed on the surface of the falling film cavity 42, and the flow rate of the leached liquid discharged from the drain hole is controlled, without the assistance of other power components, so that the liquid passing through the surface of the diffuser cone block 74 forms a liquid film surface when it is separated from the diffuser cone block 74, and then flows downward along the cavity surface in the falling film cavity 42, so that the liquid is spread as much as possible in the falling film cavity 42, and is fully in contact with the liquid cooling part 41 filled with cooling liquid and the frame 4. In this case, the leached liquid is quickly cooled down, and the solubility of calcium ions in the leached liquid is changed by lowering the temperature or the crystallization of calcium salt substances is promoted, thereby achieving the purpose of cooling and decalcifying the leached liquid;

[0052] Under the action of the cooling liquid circulating in the liquid cooling part 41, the temperature of the outer surface of the liquid cooling part 41 is relatively balanced, the cooling effect on the leachate is relatively uniform, and the crystal size of the calcium ions or calcium salt substances precipitated in the leachate is relatively uniform. Under the guidance of the diffuser cone block 74, the leachate is in the state of a liquid film and contacts the surface of the liquid cooling part 41. Although such a distribution state is conducive to reducing the possibility of scaling, slight scaling may still occur. In the face of this situation, a vibration module 11 can be installed on the outer wall of the frame 4. After the decalcification equipment has been running for a period of time, the vibration module 11 is started, and the vibration generated acts on the scale layer, the cavity wall and the water body. Due to the different responses of the three to the vibration frequency, asynchronous vibration and high-speed relative motion are generated, and relative shear force is generated on the surface of the liquid cooling part 41 and the frame 4, so that the scaling layer is fatigued and loosened, thereby achieving the purpose of descaling. In order to facilitate the maintenance and inspection of the vibration module 11, an inspection window is opened on the main shell 2 corresponding to its installation area, and a detachable protective shell 111 is installed at the inspection window to protect the vibration module 11.

[0053] Among them, Figure 6 As shown, a receiving bucket 6 is fixedly provided inside the base 1. The receiving bucket 6 closes the space inside the base 1. That is to say, the mixed slag liquid falling from the machine cover 3 and the main shell 2 will fall into the receiving bucket 6. A slag discharge pipe 61 is horizontally penetrated on one side wall of the lower part of the receiving bucket 6. The slag discharge pipe 61 is used to connect to the pump body or the discharging equipment to discharge the liquid in the decalcification equipment, and can also directly centrifuge the discharged liquid for subsequent treatment. An air duct 51 communicating with the outside is provided on the upper part of the base 1. An air inlet pipe 5 is installed in one end of the air duct 51. The air inlet pipe 5 is used to connect to the external wind making equipment to introduce the low-temperature airflow into the equipment. , an air collecting hood 52 for discharging the airflow from the device is provided on the top of the cover 3, and two air collecting hoods 52 are provided, which are symmetrically arranged on the top of the cover 3, and an exhaust port is provided on the top of the air collecting hood 52; specifically, when the device is running, a low-temperature airflow is introduced from the air inlet pipe 5, and then, this airflow will flow upward and pass through the falling film cavity 42. In the falling film cavity 42, this airflow will entrain the heat released during the cooling treatment of the liquid and discharge it upward from the exhaust port on the top of the air collecting hood 52. While this step is being carried out, the cold airflow will cool the liquid in the falling film cavity 42 to a certain extent, and cooperate with the water cooling components to reduce the calcium crystallization process;

[0054] Among them Figure 6 and Figure 7As shown, in order to prevent the airflow provided by the air inlet pipe 5 from short-circuiting or generating local vortices in the process of entering the equipment, resulting in uneven distribution of the cooling airflow entering the equipment and reduced air supply efficiency, a ventilation pipe 13 is also provided in the air duct 51, and the ventilation pipe 13 is connected to the air inlet pipe 5 through the air duct 51; a plurality of guide plates 131 are integrated in multiple directions on the ventilation pipe 13, and the plurality of guide plates 131 are arranged in various directions to guide the airflow penetrating into the air inlet pipe 5. When the airflow enters the interior of the equipment through the path separated by the guide plates 131 in the ventilation pipe 13, the guide plates 131 finely divide and guide the airflow, so that the distribution of the airflow entering the interior of the equipment is more dispersed and uniform, thereby avoiding the situation where the local airflow is too strong or too weak.

[0055] Among them, Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the main pipe 71 and the slag discharge pipe 61 are both installed with a thermometer 12, and the detection probes thereof are all inserted into the interior of the pipe so as to accurately measure the temperature of the liquid inside the pipe. The purpose of setting the thermometer 12 is to measure the temperature of the leachate entering the equipment when the equipment is working, so as to monitor the temperature of the liquid inlet and outlet of the equipment online. By linking the thermometer 12 with the power pump and the wind making equipment of the liquid circulation part, the liquid inlet and outlet volume in the liquid cooling part 41 and the air inlet volume in the equipment are adjusted in real time according to the crystallization of the calcium salt and the feedback temperature information, so as to reduce the energy consumption of the equipment and stably control the temperature range in the equipment at the optimal level.

[0056] like Figure 1 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown in the figure, to prevent a large amount of liquid droplets from being entrained by the air flow and discharged from the equipment, air storage tanks 8 are provided on both the front and rear sides of the main body housing 2. Air inlet holes and air outlet holes are opened on the left and right sides at the top of the air storage tank 8; an intake pipe 81 is provided at the exhaust port of the air collecting hood 52, and the independent intake pipes 81 provided at the upper ends of the two air collecting hoods 52 are respectively docked with the air inlet hole of a corresponding air storage tank 8 through a sealed and adjustable connection mechanism. A baffle plate 82 is provided inside the air storage tank 8 near the air inlet hole, and the overall shape of the baffle plate 82 is "L". C-shaped plates 83 are transversely arranged in a staggered manner inside the air storage tank 8. Inside the air storage tank 8, one C-shaped plate 83 relatively close to the air inlet hole is connected to the baffle plate 82, and one side of the C-shaped plate 83 relatively far from the baffle plate 82 divides a section of exhaust space inside the air storage tank 8, and a ventilation notch is opened on one side wall of this C-shaped plate 83. A separation plate 84 is provided in the separated exhaust space, and the separation plate 84 is inclined, with its lower end close to the ventilation notch. The separation plate 84 divides the exhaust space into upper and lower parts. An exhaust pipe 85 is installed at the air outlet hole of the air storage tank 8, and the lower part of the exhaust pipe 85 vertically extends into the upper space separated by the separation plate 84. Demisters 87 are provided on the inner side lower part of the exhaust pipe 85. Before the air flow is discharged from the equipment through the exhaust pipe 85, it will pass through the demister 87. A number of staggered filamentous fibers are filled inside the demister 87 to form a relatively dense liquid capture area. The liquid droplets carried in the air flow will be intercepted by the fibers of the demister 87, thereby preventing liquid droplets from being entrained in the externally exhausted air flow, ensuring that the gas discharged from the air storage tank 8 is purer, further reducing the loss of the leaching solution. The bottom of the air storage tank 8 is inclined, and a liquid flow pipe 88 is provided at the plane of its lowest end. The liquid flow pipe 88 is located below the separation plate 84. Liquid flow holes 86 allowing the liquid to flow out are opened at the lower parts of the C-shaped plates 83. The liquid at the bottom of the air storage tank will flow along the inclined surface towards the liquid flow pipe 88, and is arranged at the bottom of the air storage tank 8, at the position below the separation plate 84;

[0057] Specifically, a continuously turning air flow path is formed inside the air storage tank 8 by the baffle plate 82 and the C-shaped plates 83. After being discharged from the equipment, the air flow flows in the zigzag channel. During the flowing process, the air flow continuously changes direction, thereby increasing the contact area and time between the gas and the liquid, and realizing effective separation by utilizing the density difference between the gas and the liquid. And in the zigzag channel, the liquid particles in the gas will hit the channel wall due to inertia, and then be captured and flow down along the wall surface. They are collected towards the liquid flow pipe 88 through the inclined surface at the bottom of the air storage tank 8 and the opened liquid flow holes 86. Even if some liquid droplets reach the exhaust pipe 85 along with the air flow, they will be intercepted by the demister 87. Under the multiple gas-liquid separation processes, the effective separation of gas and liquid is finally realized, and the separated liquid will be discharged through the liquid flow pipe 88 for reuse.

[0058] Such as Figure 1 and Figure 8As shown, it also includes a top cover 10 slidably arranged at the air outlet of the air box 8, the top cover 10 closes the air outlet of the air box 8, and no less than three springs 101 are evenly spaced and installed at the lower part of the top cover 10, and the other ends of the springs 101 are connected to the air box 8. When the springs 101 are not affected by external forces, the top cover 10 will completely close the air outlet of the air box 8. At this time, external debris cannot enter the air box 8 through the air outlet, avoiding potential pollution problems. When the air flow is discharged from the air box 8, it is pushed by a large air pressure, and the top cover 10 will be pushed upward, the air outlet is opened, and the air flow is discharged smoothly from the air outlet. In this process, the springs 101 are in a stretched stress state, which plays a role of buffering and supporting. Once the air flow is disconnected, the top cover 10 is quickly reset under the elastic force of the springs 101, and returns to its original position, ready for the next air flow discharge.

[0059] like Figure 1 , Fig.12 and Fig.13 As shown, it also includes a cover shell 9 fixedly arranged on the organic cover 3, the cover shell 9 covers the liquid inlet pipe 7, an input pipe 91 is arranged at one end of the cover shell 9, and a mixing tank 92 is fixedly arranged at the other end of the cover shell 9, and its upper part is closed by the cover shell 9, the upper end of the liquid inlet pipe 7 penetrates into the mixing tank 92, and the upper end surface of the liquid inlet pipe 7 is at the same height as the bottom of the mixing tank 92, the main pipe 71 and the internal space of the mixing tank 92 are connected through the liquid inlet pipe 7, the input pipe 91 replaces the liquid inlet pipe 7 to access the leachate, the input pipe 91 is provided with a separatory pipe 93, the separatory pipe 93 is provided with no less than three pipelines, and correspondingly, the separatory pipe 93 is provided with no less than three liquid outlets, all of which penetrate into the mixing tank 92, and the mixing tank 92 is provided with a diverter block 94, one end of the diverter block 94 penetrates into the interior of the mixing tank 92, and the diverter block 94 is provided with two inlets Flow arc surface, two of the pipelines of the liquid distribution pipe 93 are arranged along the arc surface of the diverter block 94, and the liquid discharged from the pipe openings of these two pipelines will flow along the inner wall of the mixing tank 92, and the remaining pipe openings of the liquid distribution pipe 93 are facing the end face of one side of the diverter block. The liquid flow discharged from these pipelines will impact on the diverter block 94, and after impacting the diverter block 94, it will be splashed or dispersed in the mixing tank 92, so that the liquid discharged from each pipeline will be quickly mixed after impact and dispersion; through the liquid flow mixing mechanism set up, the leachate introduced into the equipment can be dynamically regulated to a certain extent without the need for an external stirring power, so as to achieve instantaneous uniform mixing of the material, avoid uneven distribution of components, ensure the homogeneity of the product, and the liquid flow mixing can effectively reduce the phenomenon of local overheating, so that the temperature of the liquid discharged from all diverter branches is more uniform. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution, comprising a base (1); It is characterized in that It also includes a main shell (2), which is vertically arranged on the upper part of the base (1) and has openings at both ends; a cover (3), which is installed on the main shell (2), and the upper end of the main shell (2) is sealed inside the cover (3); a split-flow falling film mechanism, which is arranged on the cover (3); a frame (4), which is fixedly arranged inside the main shell (2); a liquid cooling element (41), which is installed on the inner side of the frame (4), and is composed of a box-shaped channel and a plurality of evenly distributed fins. The left and right sides of the liquid cooling element (41) are both provided with circulation pipes, and the two circulation pipes both pass outward from the inner wall of the main shell (2) on the same side, and the fins of the liquid cooling element (41) are arranged inside the frame (4). A plurality of falling film chambers (42) are separated, the frame (4) and the liquid cooling part (41) are both hollow, and the internal spaces of the two are interconnected; an air inlet pipe (5) is passed through the base (1), and an air duct (51) is provided on the base (1), and the air inlet pipe (5) is connected with the internal space of the base (1) through the air duct (51); an air collecting hood (52) is symmetrically arranged on the top of the machine cover (3), and its interior is connected with the internal space of the machine cover (3), and an exhaust port is provided on the top; a receiving hopper (6) is fixedly arranged at the lower part of the base (1); a slag discharge pipe (61) is horizontally and transversely passed through one side of the lower part of the receiving hopper (6), and one end of the slag discharge pipe (61) passes out from the inside of the base (1).

2. A highly efficient decalcification equipment for nickel-cobalt high calcium leaching solution as claimed in claim 1, characterized in that: The diversion falling film mechanism comprises a main pipe (71) which is horizontally arranged in the machine cover (3), and both left and right ends of which are closed; a liquid inlet pipe (7) which is vertically arranged at a relatively central position on one side of the upper part of the main pipe (71); diversion branch pipes (72) which are evenly and symmetrically arranged on the front and rear sides of the main pipe (71), and the number of the diversion branch pipes (72) is consistent with the number of the falling film chambers (42). The diversion branch pipes (72) and the falling film chambers (42) are arranged in a one-to-one correspondence between the upper and lower positions. One end of the diversion branch pipe (72) is closed, and a plurality of drainage holes are arranged at intervals at the lower part; the liquid flow of the leachate is discharged from the liquid inlet pipe (7) into the main pipe. The liquid flows from the main pipe (71) into the branch pipe (72) and flows downward from the drainage hole of the branch pipe (72); the guide pipe (73) is arranged at the lower part of the branch pipe (72); the diffuser cone block (74) is installed at the lower part of the guide pipe (73); the liquid discharged downward from the branch pipe (72) evenly falls on the top of the diffuser cone block (74); under the guidance of the geometric shape of the diffuser cone block (74), the liquid sliding down along the surface of the diffuser cone block (74) can be evenly dispersed on the cavity surface of the falling film cavity (42), and then flows downward along the cavity surface in the falling film cavity (42).

3. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution as claimed in claim 2, characterized in that: The connection areas between the base (1) and the main body housing (2), and between the main body housing (2) and the machine cover (3) are all tightly and flexibly assembled by means of a labyrinth seal structure with a quick-disassembly and quick-assembly design.

4. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution as claimed in claim 3, characterized in that: It also includes an air storage tank (8) provided on the main body housing (2). There are two of them, respectively arranged on the front and rear sides of the main body housing (2). Air inlet holes and air outlet holes are provided on the left and right sides of the top thereof; an air inlet pipe (81) is installed on the upper part of the air collecting hood (52). Two independent air inlet pipes (81) provided at the upper end of the air collecting hood (52) are respectively and reliably docked with the air inlet holes of the corresponding air storage tank (8); a baffle plate (82) is installed at one end of the air storage tank (8) close to the air inlet hole. The whole is in an "L" shape. A C-shaped plate (83) is arranged horizontally and staggeredly in the air storage tank (8). Among them, one C-shaped plate (83) relatively close to the air inlet hole is connected to the baffle plate (82). One side of the C-shaped plate (83) relatively far from the baffle plate (82) partitions the internal space of the air storage tank (8). A ventilation hole is opened on one side wall of this C-shaped plate (83). A continuously turning air flow path is formed in the air storage tank (8) through the baffle plate (82) and the C-shaped plate (83); a separation plate (84) is installed on the C-shaped plate (83) relatively far from the baffle plate (82). A number of air holes are evenly opened thereon. The separation plate (84) is inclined. Its lower end is close to the ventilation hole. The separation plate (84) divides the space separated by the C-shaped plate (83) into upper and lower parts; an exhaust pipe (85) is vertically installed at the air outlet hole of the air storage tank (8); a demister (87) is installed in the lower part of the exhaust pipe (85); a liquid flow pipe (88) is arranged at the bottom of the air storage tank (8) and is located below the separation plate (84).

5. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution as claimed in claim 4, characterized in that: The bottom of the air storage tank (8) is inclined, and its lowest end is arranged close to the liquid flow pipe (88). Liquid flow holes (86) are opened at the lower parts of the C-shaped plates (83).

6. A highly efficient decalcification equipment for nickel-cobalt high calcium leaching solution as claimed in claim 5, characterized in that: It also includes a top cover (10) slidably arranged at the air outlet hole to close the air outlet hole; springs (101) are installed at the lower part of the top cover (10). The number of them is not less than three and they are evenly arranged at intervals on the top cover (10). The other ends thereof are connected to the air storage tank (8).

7. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution as claimed in claim 6, characterized in that: It also includes a cover shell (9) fixedly arranged on the machine cover (3); an input pipe (91) arranged at one end of the cover shell (9); a mixing tank (92) fixedly arranged at the other end of the machine cover (3), the upper part of which is closed by the cover shell (9); a liquid separator (93) installed on the input pipe (91) and connected to the input pipe (91), which is provided with no less than three pipelines, and the liquid separator (93) is provided with no less than three liquid outlets, one end of the liquid outlet of the liquid separator (93) penetrates into the mixing tank (92), and the liquid discharged from the liquid outlet forms convection in the mixing tank (92), and the lower part of the mixing tank (92) is connected and connected to the upper end of the liquid inlet pipe (7); and a diverter block (94) is arranged in the mixing tank (92).

8. The high-efficiency calcium removal equipment for nickel-cobalt high-calcium leaching solution according to claim 7, characterized in that: It also includes a vibration module (11) installed on the side wall of the frame (4), and an inspection window is opened on the main body shell (2) corresponding to the installation area; and a protective shell (111) is installed at the inspection window to protect the vibration module (11).

9. A highly efficient decalcification device for nickel-cobalt high calcium leaching solution as claimed in claim 8, characterized in that: It also includes a temperature detector (12) installed on the main pipe (71) and the slag discharge pipe (61), and its detection probes are inserted into the interior of the pipe so as to accurately measure the temperature inside the pipe.

10. The high-efficiency calcium removal equipment for nickel-cobalt high-calcium leaching solution according to claim 9, characterized in that: It also includes a ventilation pipe (13) arranged in the air duct (51) and connected to the air inlet pipe (5); a plurality of guide plates (131) which are integrated and multi-directionally arranged in the ventilation pipe (13); the plurality of guide plates (131) are arranged in various directions to guide the airflow penetrating into the air inlet pipe (5).

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