A reaction tank structure with a shaft-core through-type agitator blade for oxygen supply

Abstract

This utility model discloses a reaction tank structure with a shaft-core through-type stirring impeller for oxygen supply, relating to the fields of hydrometallurgy and stirring technology. It includes: a reaction tank body, with a hollow shaft nested in the middle of the tank body; a turbine impeller is fixedly sleeved in the middle of the hollow shaft; and a radial flow impeller is connected to the bottom end of the hollow shaft. The radial flow impeller includes a hollow disk, with multiple hollow oxygen supply blades fixed at equal intervals on the sidewall of the hollow disk. Multiple air holes are opened on the side of the hollow oxygen supply blades facing away from the direction of rotation. This utility model uses the radial flow impeller to spray bubbles near the bottom of the tank, generating a radial jet. The bubbles are immediately sheared and broken up at high speed upon exiting through the micro-holes, preventing bubble merging and deposition. The turbine impeller generates a large-scale circulating axial flow in the upper part of the liquid layer, rapidly entraining and evenly distributing the refined bubbles throughout the entire liquid volume, resulting in uniform oxygen distribution.

Description

Technical Field

[0001] This utility model relates to the fields of hydrometallurgy and stirring technology, specifically to a reaction tank structure with a shaft-core through-type stirring impeller for oxygen supply. Background Technology

[0002] Iron removal is a common process in modern industrial production, widely used in slurry treatment, hydrometallurgy, and other fields. The iron removal process primarily involves maintaining the slurry at approximately 80°C in a stirred tank for a continuous reaction over 4 hours, resulting in the precipitation of iron and the production of sulfuric acid. Traditional iron removal processes typically involve introducing oxygen into the slurry, using a chemical reaction to precipitate iron ions, thereby removing iron. This process is usually carried out in a stirred tank, where the rotation of the agitator blades promotes gas-liquid mass transfer and chemical reactions.

[0003] In traditional iron removal processes, the oxygen supply system of the stirred tank typically employs a single-pipe top-inlet method. Specifically, a main pipe is inserted vertically from the top of the tank, extending approximately 50mm below the agitator blades to release oxygen. This single-pipe top-inlet method results in oxygen being concentrated in the central area of ​​the tank, while the peripheral areas form dead zones of gas-liquid contact, which, in actual measurements, occupy up to 30% of the tank volume. This uneven oxygen distribution severely impacts iron removal efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a reaction tank structure with a shaft-core through-type agitator blade for oxygen supply, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reaction tank structure with a shaft-core through-type stirring impeller for oxygen supply, comprising:

[0006] The reaction tank has a hollow shaft nested in the middle, a turbine propeller fixedly connected to the middle of the hollow shaft, a radial flow propeller connected to the bottom end of the hollow shaft, and an external oxygen supply main pipe rotatably connected to the top wall of the reaction tank at the upper end of the hollow shaft.

[0007] A speed reducer is installed on the top of the reaction tank, and the output end of the speed reducer is connected to the hollow shaft for transmission.

[0008] The radial flow propeller includes a hollow disk, and multiple hollow oxygen supply blades are fixed at equal intervals on the side wall of the hollow disk. Multiple air holes are opened on the side of the hollow oxygen supply blades facing away from the direction of rotation, and the density of the multiple air holes is distributed along the length of the hollow oxygen supply blades in a gradient distribution.

[0009] Furthermore, the density of the pores distributed near the hollow shaft of the hollow oxygen supply blade is higher than that distributed at the edge of the hollow oxygen supply blade. This design allows oxygen to be released more densely in areas with faster material flow, based on the flow characteristics of the material during the stirring process. This better meets the oxygen demand at different locations during the reaction process and further improves the oxygen supply effect.

[0010] Furthermore, the diameter of the pores at the root of the hollow oxygen supply blade is smaller than that at the tip of the hollow oxygen supply blade. When oxygen is released from the pores, the smaller pores at the root can generate finer bubbles. These finer bubbles are more easily sheared and dispersed during the stirring process, thereby increasing the gas-liquid contact area, further improving the oxygen transfer efficiency, and promoting the reaction. The larger pores at the tip can release relatively large-volume bubbles. These bubbles can drive more liquid flow during their ascent, helping to break the liquid stratification phenomenon in the reaction tank, so that oxygen can be more evenly distributed throughout the reaction tank, further improving the uniformity of oxygen supply.

[0011] Furthermore, the inner cavity of the hollow oxygen supply blade is connected to the inner cavity of the hollow disk, and the inner cavity of the hollow disk is connected to the inner cavity of the hollow shaft, forming a complete oxygen supply channel. This ensures that oxygen can be smoothly transferred from the external oxygen supply main pipeline through the hollow shaft and hollow disk to each hollow oxygen supply blade, and then released from the air holes.

[0012] Furthermore, a rotary joint is connected between the top end of the hollow shaft and the external oxygen supply main pipe. The rotary joint can ensure a sealed connection between the external oxygen supply main pipe and the hollow shaft while the hollow shaft is rotating, effectively preventing oxygen leakage.

[0013] Furthermore, a protective cover is provided on the top of the reaction tank. The hollow shaft rotates through the protective cover. The shaft body of the hollow shaft inside the protective cover is fixedly sleeved with a first bevel gear. The output end of the reducer extends into the protective cover and is connected to a second bevel gear. The second bevel gear meshes with the first bevel gear. Through the meshing transmission of the bevel gears, the power of the reducer can be smoothly and efficiently transmitted to the hollow shaft. The protective cover can effectively protect the hollow shaft, bevel gears and other transmission components from the influence of the external environment.

[0014] Furthermore, the hollow disc and hollow oxygen supply blades are made of stainless steel. Stainless steel has high strength and can withstand greater stirring force and material impact force, ensuring that the hollow disc and hollow oxygen supply blades maintain structural stability during long-term operation and will not experience deformation or damage.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. Through the combination of components such as hollow shaft, turbine propeller, and radial flow propeller, the radial flow propeller sprays bubbles near the bottom of the tank and generates a radial jet. Once the bubbles are sprayed through the micropores, they are sheared and broken at high speed to prevent the bubbles from merging and depositing. The turbine propeller generates a large circulation axial flow in the upper part of the liquid layer, which quickly entrains the refined bubbles and distributes them evenly throughout the liquid volume, so that the oxygen is evenly distributed.

[0017] 2. The density of multiple pores is distributed along the longitudinal gradient of the hollow oxygen supply blade, which enables oxygen to be released evenly from different positions of the hollow oxygen supply blade during the stirring process, so as to fully contact the reactants, improve the utilization rate of oxygen, and thus enhance the reaction efficiency.

[0018] 3. The diameter of the pores at the root of the hollow oxygen supply blade is smaller than that at the tip. When oxygen is released from the pores, the smaller pores at the root can generate finer bubbles. These finer bubbles are more easily sheared and dispersed during stirring, thereby increasing the gas-liquid contact area, further improving the oxygen transfer efficiency, and promoting the reaction. The larger pores at the tip can release relatively larger bubbles. These bubbles can drive more liquid flow during their ascent, helping to break the liquid stratification in the reaction tank, allowing oxygen to be more evenly distributed throughout the reaction tank, and further improving the uniformity of oxygen supply. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram showing the connection between the hollow shaft and the turbine propeller and the radial flow propeller of this utility model.

[0022] Figure 3 This is a schematic diagram of the radial flow propeller of this utility model;

[0023] Figure 4 This is a schematic diagram of the appearance of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Reaction tank; 2. Hollow shaft; 3. Turbine propeller; 4. Radial flow propeller; 5. Reducer; 6. Hollow disc; 7. Hollow oxygen supply blade; 8. Air vent; 9. Rotary joint; 10. Protective cover; 11. First bevel gear; 12. Second bevel gear. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figures 1 to 4 The reactor structure shown is a shaft-core through-type agitator impeller oxygen supply system, comprising:

[0028] The reaction tank 1 has a hollow shaft 2 nested in the middle of the reaction tank 1. A turbine propeller 3 is fixedly sleeved in the middle of the hollow shaft 2. A radial flow propeller 4 is connected to the bottom end of the hollow shaft 2. An external oxygen supply main pipe is movably connected to the top wall of the reaction tank 1 through the upper end of the hollow shaft 2.

[0029] The reducer 5 is installed on the top of the reaction tank 1, and the output end of the reducer 5 is connected to the hollow shaft 2 for transmission.

[0030] The radial flow propeller 4 includes a hollow disk 6, and multiple hollow oxygen supply blades 7 are fixed at equal intervals on the side wall of the hollow disk 6. Multiple air holes 8 are opened on the side of the hollow oxygen supply blades 7 facing away from the direction of rotation, and the density of the multiple air holes 8 is distributed along the length of the hollow oxygen supply blades 7 in a gradient distribution.

[0031] The inner cavity of the hollow oxygen supply blade 7 is connected to the inner cavity of the hollow disk 6, and the inner cavity of the hollow disk 6 is connected to the inner cavity of the hollow shaft 2, forming a complete oxygen supply channel. This ensures that oxygen can be smoothly transferred from the external oxygen supply main pipeline through the hollow shaft 2 and the hollow disk 6 to each hollow oxygen supply blade 7, and then released from the air hole 8.

[0032] A rotary joint 9 is connected between the top of the hollow shaft 2 and the external oxygen supply main pipeline. The rotary joint 9 can ensure a sealed connection between the external oxygen supply main pipeline and the hollow shaft 2 while the hollow shaft 2 is rotating, effectively preventing oxygen leakage.

[0033] The top of the reaction tank 1 is provided with a protective cover 10. The hollow shaft 2 rotates through the protective cover 10. The shaft body of the hollow shaft 2 inside the protective cover 10 is fixedly sleeved with a first bevel gear 11. The output end of the reducer 5 extends into the protective cover 10 and is connected to a second bevel gear 12. The second bevel gear 12 meshes with the first bevel gear 11. Through the meshing transmission of the bevel gears, the power of the reducer 5 can be smoothly and efficiently transmitted to the hollow shaft 2. The protective cover 10 can effectively protect the hollow shaft 2, bevel gears and other transmission components from the influence of the external environment.

[0034] The hollow disc 6 and the hollow oxygen supply blade 7 are made of stainless steel. Stainless steel has high strength and can withstand greater stirring force and material impact force, ensuring that the hollow disc 6 and the hollow oxygen supply blade 7 maintain structural stability during long-term operation and will not have problems such as deformation or damage.

[0035] In this invention, the reducer 5 drives the hollow shaft 2 to rotate through the meshing of the second bevel gear 12 and the first bevel gear 11. The rotation of the hollow shaft 2 drives the turbine propeller 3 and the radial flow propeller 4 to rotate. Oxygen enters the hollow shaft 2 through the external oxygen supply main pipe and the rotary joint 9, and then is transmitted to each hollow oxygen supply blade 7 through the hollow disk 6. Finally, it is released from the air hole 8. The radial flow propeller 4 sprays bubbles near the bottom of the tank and generates a radial jet. The bubbles are sheared and broken at high speed as soon as they are sprayed through the microhole, preventing the bubbles from merging and depositing. The turbine propeller 3 generates a large circulating axial flow in the upper part of the liquid layer, which quickly entrains the refined bubbles and distributes them evenly throughout the liquid volume, so that the oxygen is evenly distributed.

[0036] like Figure 3 As shown, the density of pores 8 in the part of the hollow oxygen supply blade 7 near the hollow shaft 2 is higher than the density of pores 8 at the edge of the hollow oxygen supply blade 7.

[0037] The diameter of the air hole 8 located at the root of the hollow oxygen supply blade 7 is smaller than the diameter of the air hole 8 located at the end of the hollow oxygen supply blade 7.

[0038] In this invention, the density of pores 8 distributed near the hollow shaft 2 of the hollow oxygen supply blade 7 is higher than that distributed at the edge of the hollow oxygen supply blade 7. This design allows oxygen to be released more densely in areas with faster material flow, based on the flow characteristics of the material during the stirring process. This better meets the oxygen demand at different locations during the reaction process and further improves the oxygen supply effect. The diameter of the pores 8 at the root of the hollow oxygen supply blade 7 is smaller than that at the end of the hollow oxygen supply blade 7. When oxygen is released from the pores 8, the smaller pores 8 at the root can generate finer bubbles. These finer bubbles are more easily sheared and dispersed during the stirring process, thereby increasing the gas-liquid contact area, further improving the oxygen transfer efficiency, and promoting the reaction. The larger pores 8 at the end can release relatively large-volume bubbles. These bubbles can drive more liquid flow during their ascent, helping to break the liquid stratification phenomenon in the reaction tank 1, allowing oxygen to be distributed more evenly throughout the reaction tank 1, and further improving the uniformity of oxygen supply.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reaction tank structure with an oxygen supply by a shaft core through type stirring blade, characterized by, include: The reaction tank (1) has a hollow shaft (2) nested in the middle. A turbine propeller (3) is fixedly sleeved in the middle of the hollow shaft (2). A radial flow propeller (4) is connected to the bottom end of the hollow shaft (2). An external oxygen supply main pipe is movably connected to the top wall of the reaction tank (1) through the upper end of the hollow shaft (2). A speed reducer (5) is installed on the top of the reaction tank (1), and the output end of the speed reducer (5) is connected to the hollow shaft (2) for transmission. The radial flow propeller (4) includes a hollow disk (6), and a plurality of hollow oxygen supply blades (7) are fixed at equal intervals on the side wall of the hollow disk (6). A plurality of air holes (8) are opened on the side of the hollow oxygen supply blades (7) facing away from the rotation direction. The density of the plurality of air holes (8) is distributed in a gradient along the length of the hollow oxygen supply blades (7).

2. The structure of a reaction tank with a shaft core through type of stirring blade and oxygen supply according to claim 1, characterized in that: The density of the pores (8) in the part of the hollow oxygen supply blade (7) near the hollow shaft (2) is higher than the density of the pores (8) in the edge of the hollow oxygen supply blade (7).

3. The structure of a shaft core through type stirring blade oxygen supply reaction tank according to claim 1, characterized in that: The diameter of the pores (8) at the root of the hollow oxygen supply blade (7) is smaller than the diameter of the pores (8) at the end of the hollow oxygen supply blade (7).

4. The structure of a reaction tank with oxygen supply by a shaft core through type of stirring blade according to claim 1, characterized in that: The inner cavity of the hollow oxygen supply blade (7) is connected to the inner cavity of the hollow disk (6), and the inner cavity of the hollow disk (6) is connected to the inner cavity of the hollow shaft (2).

5. The shaft core through type stirring blade oxygen supply reaction tank structure according to claim 1, characterized in that: A rotary joint (9) is connected between the top of the hollow shaft (2) and the external oxygen supply main pipe.

6. The shaft core through type stirring blade oxygen supply reaction tank structure according to claim 1, characterized in that: The top of the reaction tank (1) is provided with a protective cover (10). The hollow shaft (2) rotates through the protective cover (10). The shaft body of the hollow shaft (2) inside the protective cover (10) is fixedly sleeved with a first bevel gear (11). The output end of the reducer (5) extends into the protective cover (10) and is connected to a second bevel gear (12). The second bevel gear (12) meshes with the first bevel gear (11).

7. The reaction tank structure with a shaft-core through-type agitator blade for oxygen supply according to claim 1, characterized in that: The hollow disc (6) and the hollow oxygen supply blade (7) are made of stainless steel.

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