Leaching device

Abstract

The utility model discloses a leaching device. The leaching device comprises a stirring assembly and a leaching tank body, the stirring assembly comprises a stirring part, and the rotating axis of the stirring part extends in the vertical direction; the leaching tank body comprises a concrete tank body and an anti-corrosion layer arranged on the inner wall of the concrete tank body, the anti-corrosion layer defines a leaching tank, the stirring part is located in the leaching tank, and the cross section, perpendicular to the vertical direction, of the leaching tank is polygonal. According to the leaching device, on the premise that the leaching effect is guaranteed, the leaching energy consumption can be reduced, the service life is long, and the leaching device is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrometallurgy, in particular to a leaching device. Background Art

[0002] In recent years, the types of salt raw materials have been increasing continuously, many improvements have been made in the leaching process, and the design of leaching systems has gradually become diversified. However, the energy consumption of the leaching system has been remaining high, and there are still many deficiencies in the matching of high-specific-gravity raw material leaching and leaching equipment.

[0003] In the field of hydrometallurgy, the leaching tanks used for atmospheric leaching are mostly circular leaching tanks. During the leaching process, usually 4 baffles are arranged in the circular leaching tank to realize the change of the fluid flow direction in the leaching tank.

[0004] Due to the condition of full baffles, the energy consumption of leaching is relatively high. At the same time, the baffles are easily damaged by impact during long-term use, the maintenance cycle is long, and it affects production. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a leaching device, which can reduce the leaching energy consumption, has a long service life and is not easily damaged on the premise of ensuring the leaching effect.

[0006] The leaching device according to the embodiment of the utility model includes a stirring assembly and a leaching tank body. The stirring assembly includes a stirring part, and the rotation axis of the stirring part extends in the up-and-down direction; the leaching tank body includes a concrete tank body and an anti-corrosion layer arranged on the inner wall of the concrete tank body. The anti-corrosion layer defines a leaching tank, the stirring part is located in the leaching tank, and the cross-section of the leaching tank perpendicular to the up-and-down direction is polygonal.

[0007] For the leaching device according to the embodiment of the utility model, on the one hand, by setting the cross-section of the leaching tank of the leaching tank body perpendicular to the up-and-down direction as polygonal, on the premise of ensuring the leaching effect, the generation of radial flow is reduced, the energy loss is reduced, and thus the leaching energy consumption can be reduced; on the other hand, due to the cancellation of the baffle, the mixing blind area in the leaching tank is also reduced, which is beneficial to increasing the degree of full mixing of substances in the tank, and at the same time avoids the problem that the baffle is easily damaged, has a long service life, can reduce the number of inspections, and is beneficial to improving production efficiency; on the other hand, the leaching tank body includes a concrete tank body and an anti-corrosion layer arranged on the inner wall of the concrete tank body, and has better durability and corrosion resistance.

[0008] In some embodiments, the cross-section of the leaching tank perpendicular to the up-and-down direction is a regular octagon.

[0009] In some embodiments, a feed port, a discharge port and an overflow pipe body are provided on the side wall of the leaching tank body, and the installation height of the discharge port is lower than that of the feed port; the overflow pipe body has an overflow pipe, the feed port is communicated with the leaching tank, the discharge port is communicated with the leaching tank through the overflow pipe, the overflow pipe body has a lower communication port, the overflow pipe is communicated with the leaching tank through the lower communication port, and in the up-down direction, the lower communication port is lower than the discharge port.

[0010] In some embodiments, the overflow pipe body has an upper communication port, the overflow pipe is communicated with the leaching tank through the upper communication port, and the upper communication port is higher than the feed port.

[0011] In some embodiments, the overflow pipe body protrudes from the inner side wall of the leaching tank body.

[0012] In some embodiments, the leaching device includes an air inlet pipe, at least a part of the air inlet pipe is arranged in the overflow pipe and is used for introducing gas into the overflow pipe, and the air outlet of the air inlet pipe faces downward.

[0013] In some embodiments, the leaching device includes a gas inlet pipe and a steam inlet pipe, the gas inlet pipe is used for introducing reaction gas into the leaching tank, the steam inlet pipe is used for introducing high-temperature steam into the leaching tank, and the outlet ends of the gas inlet pipe and the steam inlet pipe are both located at the lower part of the leaching tank.

[0014] In some embodiments, the gas inlet pipe includes an outlet pipe section, at least a part of the outlet pipe section is located directly below the stirring part, and a plurality of air outlet holes are arranged on the outer peripheral wall of the outlet pipe section.

[0015] In some embodiments, in the horizontal direction, the arrangement density of the air outlet holes near the middle of the leaching tank is greater than that of the air outlet holes far from the middle of the leaching tank.

[0016] In some embodiments, the orientation direction of the air outlet holes is arranged at a set angle with the up-down direction.

[0017] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a first three-dimensional structural schematic diagram of a leaching tank body in the leaching device according to an embodiment of the present utility model;

[0020] Figure 2 Structural schematic diagram of the leaching device according to an embodiment of the present utility model;

[0021] Figure 3 Second three-dimensional structural schematic diagram of the leaching tank body in the leaching device according to an embodiment of the present utility model;

[0022] Figure 4 Top view of the leaching tank body in the leaching device according to an embodiment of the present utility model;

[0023] Figure 5 is Figure 4 Sectional view taken along line B-B in;

[0024] Figure 6 is Figure 4 Sectional view taken along line C-C in;

[0025] Figure 7 Structural schematic diagram of the gas inlet pipe in an embodiment of the present utility model;

[0026] Figure 8 Top view of the leaching device according to an embodiment of the present utility model;

[0027] Figure 9 Structural schematic diagram of the cover body in an embodiment of the present utility model.

[0028] Reference numerals:

[0029] Leaching device 100;

[0030] Stirring assembly 10; Rotation axis F;

[0031] Leaching tank body 20;

[0032] Concrete tank body 201; Anticorrosion layer 202; Fiberglass layer 2021; Acid-resistant brick layer 2022;

[0033] Leaching tank 203; Feed inlet 204; Discharge outlet 205; Overflow pipe body 206;

[0034] Overflow pipeline 2061; Lower connection port 2062; Upper connection port 2063; Leg 207;

[0035] Inclined surface 208;

[0036] Air inlet pipe 30;

[0037] Gas inlet pipe 40;

[0038] Outlet pipe section 401; Air outlet hole 402; Installation pipe section 403; Connecting flange 404;

[0039] Half flange 405;

[0040] Steam inlet pipe 50;

[0041] Cover plate 60;

[0042] First cover part 601; Second cover part 602; Third cover part 603;

[0043] Mounting bracket 70;

[0044] First mounting frame 801; Second mounting frame 802; First exhaust pipe 901; Second exhaust pipe 902. Detailed implementation manners

[0045] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0046] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the description and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "attached to" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] The term "and / or" in the present utility model only describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present utility model generally represents an "or" relationship between the front and rear associated objects.

[0049] In the embodiments of the present utility model, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present utility model shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only illustrative and should not constitute any limitation to the present utility model.

[0050] The "plurality" appearing in the present utility model means two or more (including two).

[0051] The following will describe the leaching device 100 of the present utility model in conjunction with Figures 1 to 9 to describe the leaching device 100 of the present utility model.

[0052] As Figures 1 to 5 shown, the leaching device 100 according to an embodiment of the present utility model includes a stirring assembly 10 and a leaching tank body 20. The stirring assembly 10 includes a stirring part, and the rotation axis F of the stirring part extends in the vertical direction; the leaching tank body 20 includes a concrete tank body 201 and an anti-corrosion layer 202 provided on the inner wall of the concrete tank body 201. The anti-corrosion layer 202 defines a leaching tank 203. The stirring part is located in the leaching tank 203, and the cross-section of the leaching tank 203 perpendicular to the vertical direction is polygonal.

[0053] Specifically, the stirring part is used to stir the fluid in the leaching tank 203 so that the substances (such as solid-liquid-gas three phases) in the leaching tank 203 react and mix sufficiently.

[0054] Exemplarily, the upper end of the leaching tank 203 is open, and a cover plate 60 is provided on the upper end opening of the leaching tank 203. The shape of the cover plate 60 can match the shape of the cross-section of the leaching tank 203 perpendicular to the vertical direction. An installation bracket 70 is provided on the cover plate 60. The stirring assembly 10 includes a stirring part and a driving part. The driving part is connected to the stirring part for driving the stirring part to rotate, and the driving part is installed on the installation bracket 70. Exemplarily, the installation bracket 70 can be integrally welded with H-shaped steel (i.e., steel with an H-shaped cross-section), and has high structural strength.

[0055] Reference may be made to Figure 1 、 Figure 3 and Figure 4 , the leaching tank body 20 includes a concrete tank body 201 and an anti-corrosion layer 202 provided on the inner wall of the concrete tank body 201. In this way, the leaching tank body 20 has better weather resistance, better corrosion resistance, longer service life and lower manufacturing cost. Exemplarily, the anti-corrosion layer 202 may include a fiberglass layer 2021, a mortar layer, and an acid-resistant brick layer 2022 arranged in sequence from outside to inside. It has good durability and good corrosion resistance effect.

[0056] In the related art, the cross-section of the leaching tank is circular, and a plurality of baffles are provided on the circumferential side walls of the leaching tank. In the presence of the baffles, the tangential flow formed by the fluid in the stirring part will form a radial flow after hitting the baffles, resulting in a large amount of energy loss, and a mixing blind area will exist in the part of the baffle close to the inner wall of the leaching tank.

[0057] In the present application, the leaching tank 203 is a polygonal cross section perpendicular to the up and down directions, that is, the present application directly changes the shape of the cross section of the leaching tank 203, improves the leaching tank with a circular cross section into a leaching tank with a polygonal cross section, and cancels the setting of the baffle, and the circumferential wall surface of the leaching tank 203 is a plurality of faces connected in sequence along the circumference and arranged at a set angle. When the fluid moves under the drive of the stirring part, turbulence will be formed at the junction of adjacent faces (or the corner of the leaching tank 203), so that the solid materials in the leaching tank 203 are in a suspended state as much as possible, reducing the problem of solid materials sinking to the bottom; at the same time, the generation of radial flow is reduced, and the energy loss of the stirring assembly 10 is reduced without affecting the overall kinetic energy in the leaching tank 203. In addition, due to the cancellation of the baffle, the mixing blind area in the leaching tank 203 is also reduced, which is conducive to increasing the degree of full mixing of the materials in the tank, while avoiding the problem that the baffle is easily damaged, and the service life is long, which can reduce the number of maintenance times and is conducive to improving production efficiency.

[0058] According to the leaching device 100 of the embodiment of the utility model, on the one hand, by setting the cross-section of the leaching tank 203 of the leaching tank body 20 perpendicular to the up and down direction to a polygon, the generation of radial flow is reduced and the energy loss is reduced while ensuring the leaching effect, thereby reducing the leaching energy consumption; on the other hand, due to the cancellation of the baffle, the mixing blind area in the leaching tank 203 is also reduced, which is beneficial to increase the degree of sufficient mixing of the substances in the tank, and at the same time avoids the problem of easy damage to the baffle, has a long service life, can reduce the number of maintenance times, and is beneficial to improve production efficiency; on the other hand, the leaching tank body 20 includes a concrete tank body 201 and an anti-corrosion layer 202 arranged on the inner wall of the concrete tank body 201, which has better durability and better corrosion resistance.

[0059] According to some embodiments of the present invention, reference can be made to Figure 1 , Figure 3 and Figure 4 The cross section of the leaching tank 203 perpendicular to the up and down directions is a regular octagon.

[0060] According to fluid simulation analysis, the leaching tank 203 with a regular octagonal cross section has better fluid distribution uniformity and is less likely to have local material accumulation problems; at the same time, the manufacturing difficulty of the leaching tank 203 is also relatively low.

[0061] According to the usage of the octagonal leaching tank 203 that has been put into use, compared with the circular leaching tank in the related art, where the diameter of the circular leaching tank is equal to the diameter of the inscribed circle of the cross-sectional shape of the octagonal leaching tank 203, the solution filling amount of the octagonal leaching tank 203 can be increased by 8%, and energy can be saved by 15% - 20%.

[0062] In some embodiments, the leaching device 100 of the present utility model is used for leaching cobalt and nickel in solid substances, and the specific gravity of the leaching raw materials is relatively heavy and prone to sinking to the bottom.

[0063] According to some embodiments of the present utility model, reference can be made to Figures 1 to 4 , the side wall of the leaching tank body 20 is provided with a feed port 204, a discharge port 205, and an overflow pipe body 206. The setting height of the discharge port 205 is lower than the setting height of the feed port 204. In this way, the fluid in the leaching tank 203 can be automatically discharged by using the height difference between the feed port 204 and the discharge port 205, and backflow is not likely to occur at the feed port 204.

[0064] Reference can be made to Figure 5 , the overflow pipe body 206 has an overflow pipe 2061. The feed port 204 is communicated with the leaching tank 203, the discharge port 205 is communicated with the leaching tank 203 through the overflow pipe 2061. The overflow pipe body 206 has a lower communication port 2062, and the overflow pipe 2061 is communicated with the leaching tank 203 through the lower communication port 2062. In the up and down direction, the lower communication port 2062 is lower than the discharge port 205. The lower communication port 2062 is provided at the lower part of the overflow pipe body 206.

[0065] More specifically, the height difference between the lower communication port 2062 and the feed port 204 is much larger than the height difference between the feed port 204 and the discharge port 205. Exemplarily, the lower communication port 2062 can be provided on the side wall of the overflow pipe body 206 facing the circumferential side wall of the leaching tank 203; or, the lower end opening of the overflow pipe body 206 is formed as the lower communication port 2062.

[0066] During the operation of the leaching device 100, the fluid enters the leaching tank 203 from the feed port 204, then enters the overflow pipe 2061 through the lower communication port 2062 of the overflow pipe body 206, and flows upward to reach the discharge port 205, thereby reducing the possibility of the fluid directly reaching the discharge port 205 from the feed port 204 and increasing the flow path of the fluid in the leaching tank 203. Therefore, it is beneficial to improve the reaction degree.

[0067] According to some embodiments of the present utility model, such as Figure 5As shown, the overflow pipe body 206 has an upper communication port 2063. The upper communication port 2063 is provided at the upper part of the overflow pipe body 206. For example, the upper communication port 2063 can be provided on the circumferential side wall of the overflow pipe body 206 facing the leaching tank 203; alternatively, the upper opening of the leaching tank body 20 forms the upper communication port 2063. The overflow pipe 2061 communicates with the leaching tank 203 through the upper communication port 2063. The upper communication port 2063 of the overflow pipe body 206 can be used for exhausting gas, which can reduce the possibility that the smooth discharge of fluid from the discharge port 205 is affected due to the accumulation of gas in the overflow pipe 2061.

[0068] The upper communication port 2063 is higher than the feed port 204, that is to say, the upper communication port 2063 is higher than the discharge port 205. In this way, the fluid in the leaching tank 203 is not easily introduced into the overflow pipe 2061 from the upper communication port 2063, and as much as possible, the fluid in the leaching tank 203 enters the overflow pipe 2061 from the lower communication port 2062, which is beneficial to increasing the flow path of the fluid. Since the fluid in the leaching tank 203 is continuously stirred, the liquid level may be higher than the feed port 204. Therefore, making the upper communication port 2063 higher than the feed port 204 can further reduce the possibility that the fluid enters the overflow pipe 2061 from the upper communication port 2063.

[0069] According to some embodiments of the present invention, as Figure 1 、 Figures 3 to 5 shown, the overflow pipe body 206 protrudes from the inner side wall of the leaching tank body 20.

[0070] In this way, when the fluid in the leaching tank 203 flows, it will impact the outer side wall of the overflow pipe body 206. That is to say, the overflow pipe body 206 can also play a role in increasing the turbulence degree of the local fluid in the leaching tank 203; at the same time, since the overflow pipe body 206 protrudes from the inner side wall of the leaching tank body 20, it is more convenient to install the overflow pipe body 206 on the leaching tank body 20. In some other embodiments, the overflow pipe body 206 can also be embedded in the inner side wall of the leaching tank body 20.

[0071] According to some embodiments of the present invention, reference can be made to Figure 5 and Figure 7 , the leaching device 100 includes an air inlet pipe 30. The air inlet pipe 30 is at least partially disposed in the overflow pipe 2061 and is used to introduce gas into the overflow pipe 2061, and the air outlet of the air inlet pipe 30 faces downward.

[0072] It should be noted that after the fluid enters the overflow pipe 2061, the flow velocity slows down and the flow power is small, and the solids in the fluid are likely to accumulate in the overflow pipe 2061. By providing an air inlet pipe 30 to introduce gas into the overflow pipe 2061, the rapidly flowing gas can increase the flow power of the fluid in the overflow pipe 2061, so that the fluid can carry enough solids to discharge from the discharge port 205 and the solids are not likely to accumulate in the overflow pipe 2061. The air outlet of the air inlet pipe 30 is arranged downward, which can reduce the impact degree of the gas on the cover plate 60, reduce the possibility that the gas leaves the overflow pipe 2061 too quickly, and enable the gas to fully agitate the fluid in the overflow pipe 2061. Exemplarily, the gas can be compressed air.

[0073] In some embodiments, the air inlet pipe 30 can be arranged in the gas inlet pipe 40 and communicated with the gas inlet pipe 40.

[0074] According to some embodiments of the present invention, as Figures 3 to 5 shown, the leaching device 100 includes a gas inlet pipe 40 and a steam inlet pipe 50. The gas inlet pipe 40 is used to introduce reaction gas into the leaching tank 203, and the steam inlet pipe 50 is used to introduce high-temperature steam into the leaching tank 203. The outlet ends of the gas inlet pipe 40 and the steam inlet pipe 50 are both located in the lower part of the leaching tank 203.

[0075] The gas inlet pipe 40 is used to introduce reaction gas into the leaching tank 203. For example, to carry out a gas-liquid-solid three-phase reaction, the reaction gas can be compressed air (containing oxygen). It can be understood that here, according to the different chemical reactions occurring in the leaching device 100, the reaction gas can correspond to different gases.

[0076] The steam inlet pipe 50 is used to introduce high-temperature steam into the leaching tank 203 to heat the fluid in the leaching tank 203, accelerate the reaction rate of the substances in the leaching tank 203, and ensure the reaction temperature in the leaching tank 203.

[0077] The outlet ends of the gas inlet pipe 40 and the steam inlet pipe 50 are both located in the lower part of the leaching tank 203. In this way, the moving paths of the reaction gas and the high-temperature steam in the leaching tank 203 can be extended as much as possible, and the contact time between the reaction gas and the high-temperature steam and the fluid can be extended as much as possible.

[0078] Exemplarily, the steam inlet pipe 50 can be installed on the first mounting bracket 801 through U-shaped bolts. The first mounting bracket 801 is installed on the circumferential side wall of the leaching tank 203, and the steam inlet pipe 50 passes through the cover plate 60. In this way, the installation difficulty of the steam inlet pipe 50 is small and the installation is stable.

[0079] According to some embodiments of the present invention, the gas inlet pipe 40 includes an air outlet pipe section 401 , which is at least partially located directly below the stirring part, and a plurality of air outlet holes 402 are provided on the outer peripheral wall of the air outlet pipe section 401 .

[0080] Here, by providing a plurality of gas outlet holes 402, the reaction gas can be discharged from the plurality of gas outlet holes 402, and the bubble size formed by the discharged reaction gas is small, which is conducive to increasing the contact area between the reaction gas and the fluid in the leaching tank 203, thereby improving the utilization rate of the reaction gas. The gas outlet pipe section 401 is at least partially located directly below the stirring part, so that the reaction gas is discharged from the gas outlet holes 402 and moves upward, and can contact the stirring part and be dispersed by the stirring part, thereby making the dispersion of the reaction gas uniform.

[0081] Exemplarily, the gas inlet pipe 40 includes a mounting pipe section 403, which is passed through the side wall of the leaching tank 20 and one end of which is connected to the gas outlet pipe section 401. More specifically, one end of the gas outlet pipe section 401 is provided with a connecting flange 404, and one end of the mounting pipe section 403 is connected to the connecting flange 404 through two half flanges 405 to achieve the connection between the mounting pipe section 403 and the gas outlet pipe section 401.

[0082] More specifically, a second mounting frame 802 is provided at the bottom of the leaching tank 203, and the air outlet pipe section 401 is fixed to the second mounting frame 802 by U-shaped bolts to reduce the possibility of shaking of the air outlet pipe section 401 during use, which is conducive to the stable installation of the air outlet pipe section 401.

[0083] In some embodiments, the cross-sectional area of ​​the inlet end of the gas inlet pipe 40 may be larger than the sum of the cross-sectional areas of all the gas outlet holes 402 , so that gas can be discharged from all the gas outlet holes 402 as much as possible, and the gas discharge is more uniform.

[0084] In some embodiments, a plurality of gas inlet pipes 40 are provided, and some of the gas inlet pipes 40 are installed on the circumferential side wall of the leaching tank 203. The lower end opening of the gas inlet pipe 40 directly faces the leaching tank 203, and the lower end opening of the gas inlet pipe 40 is oriented in a direction from top to bottom and toward the middle of the leaching tank 203 in the horizontal direction. Exemplarily, the gas inlet pipe 40 includes a connected vertical pipe section and an inclined pipe section, the vertical pipe section extends in the up-down direction, one end of the inclined pipe section is connected to the vertical pipe section, and the other end of the inclined pipe section defines the lower end opening of the gas inlet pipe 40, and the vertical pipe section is passed through the cover plate 60. A first mounting frame 801 is provided on the circumferential side wall of the leaching tank 203, and the vertical pipe section is mounted on the first mounting frame 801 by U-shaped bolts to achieve stable installation of the gas inlet pipe 40.

[0085] According to some embodiments of the present utility model, in the horizontal direction, the arrangement density of the air outlet holes 402 near the middle of the leaching tank 203 is greater than that of the air outlet holes 402 far from the middle of the leaching tank 203.

[0086] That is to say, the total area of the air outlet holes 402 near the middle of the leaching tank 203 is larger, and the reaction gas will enter the middle of the leaching tank 203 as much as possible. In this way, it is beneficial to improve the utilization rate of the reaction gas, and as much reaction gas as possible can be dispersed by the stirring part arranged in the middle to further increase the dispersion uniformity of the reaction gas.

[0087] According to some embodiments of the present utility model, the orientation direction of the air outlet holes 402 is arranged at a set angle with the up-down direction. For example, the angle between the orientation direction of the air outlet holes 402 and the up-down direction is 90° (such as Figure 5 、 Figure 6 shown), 80°, 70°, etc. In this way, the flow direction of the reaction gas at the air outlet holes 402 is a horizontal flow direction or the flow velocity has a component velocity in the horizontal direction, so that the reaction gas can reach the outer end of the radial direction of the stirring part. The linear velocity at the outer end of the radial direction of the stirring part is relatively large, and the dispersion effect on the reaction gas is good, which is beneficial to further increasing the dispersion uniformity of the reaction gas.

[0088] In some embodiments, the side wall of the leaching tank body 20 is further provided with a first installation hole for installing a first drain pipe 901 and a gas inlet pipe 40, and the bottom of the leaching tank body 20 is further provided with a second installation hole for installing a second drain pipe 902. Among them, the first drain pipe 901 and the second drain pipe 902 are used to drain the fluid in the leaching tank 203.

[0089] In some embodiments, as can be referred to Figure 9 shown, the cover plate 60 includes a plurality of parts spliced with each other, and each part correspondingly covers a part of the upper opening of the leaching tank 203. In this way, the processing difficulty of the cover plate 60 can be reduced, and when the leaching device 100 is overhauled and maintained, the cover plate 60 can be disassembled separately, and the operation is more convenient. In a specific embodiment, the cover plate 60 includes a first cover part 601, a second cover part 602 and a third cover part 603 arranged in sequence along a direction. The first cover part 601 and the third cover part 603 are both trapezoidal, the second cover part 602 is rectangular, the first cover part 601 and the second cover part 602 are bolted, and the second cover part 602 and the third cover part 603 are bolted. The cover part is provided with a plurality of functional ports to flexibly meet different use requirements.

[0090] In some embodiments, legs 207 are connected to the bottom of the leaching tank body 20. Multiple leaching devices 100 can be used in series. That is, for three adjacent and sequentially arranged leaching devices 100, the heights of the legs 207 decrease in sequence. The feed port 204 of the leaching device 100 in the middle is connected to the discharge port 205 of the upstream leaching device 100, and the discharge port 205 of the leaching device 100 in the middle is connected to the feed port 204 of the downstream leaching device 100, so as to facilitate the fluid to flow through multiple leaching devices 100 in sequence and achieve continuous reaction.

[0091] In some embodiments, the circumferential side wall and the bottom wall of the leaching tank 203 are connected by an inclined surface 208. During the stirring process, when the fluid is pressed downward, the presence of the inclined surface 208 can change the direction of fluid movement, reduce the mixing blind area, and reduce the phenomenon of solid deposition.

[0092] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0093] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A leaching device, characterized in that: include: A stirring assembly, the stirring assembly comprising a stirring portion, wherein a rotation axis of the stirring portion extends in an up-down direction; The leaching tank body comprises a concrete tank body and an anti-corrosion layer arranged on the inner wall of the concrete tank body, the anti-corrosion layer defines a leaching tank, the stirring part is located in the leaching tank, and the cross-section of the leaching tank perpendicular to the up and down directions is polygonal.

2. The leaching device according to claim 1, characterized in that: The cross section of the leaching tank perpendicular to the up and down directions is a regular octagon.

3. The leaching device according to claim 1, characterized in that: The side wall of the leaching tank body is provided with a feed port, a discharge port and an overflow pipe body, and the setting height of the discharge port is lower than the setting height of the feed port; The overflow pipe body has an overflow pipe, the feed port is connected to the leaching tank, the discharge port is connected to the leaching tank through the overflow pipe, the overflow pipe body has a lower connecting port, the overflow pipe is connected to the leaching tank through the lower connecting port, and in the up and down direction, the lower connecting port is lower than the discharge port.

4. The leaching device according to claim 3, characterized in that: The overflow pipe body has an upper communicating port, the overflow pipe is communicated with the leaching tank through the upper communicating port, and the upper communicating port is higher than the feed port.

5. The leaching device according to claim 3, characterized in that: The overflow pipe body is arranged to protrude from the inner side wall of the leaching tank body.

6. The leaching device according to claim 4, characterized in that: It comprises an air inlet pipe, which is at least partially arranged in the overflow pipe and is used to introduce gas into the overflow pipe, and the air outlet of the air inlet pipe faces downward.

7. The leaching device according to claim 1, characterized in that: It comprises a gas inlet pipe and a steam inlet pipe, wherein the gas inlet pipe is used to introduce reaction gas into the leaching tank, and the steam inlet pipe is used to introduce high-temperature steam into the leaching tank, and the outlet ends of the gas inlet pipe and the steam inlet pipe are both located at the lower part of the leaching tank.

8. The leaching device according to claim 7, characterized in that: The gas inlet pipe comprises an air outlet pipe section, wherein at least a part of the air outlet pipe section is located directly below the stirring part, and a plurality of air outlet holes are arranged on the outer peripheral wall of the air outlet pipe section.

9. The leaching device according to claim 8, characterized in that: In the horizontal direction, the arrangement density of the gas outlet holes near the middle of the leaching tank is greater than the arrangement density of the gas outlet holes far from the middle of the leaching tank.

10. The leaching device according to claim 8, characterized in that: The direction of the air outlet is arranged at a set angle with the up-down direction.

Images