Semicircular pipe bent blade turbine disc stirrer

Abstract

The utility model discloses a semicircular pipe bent blade turbine disc stirrer which is low in energy consumption, small in power change along with ventilation and good in gas dispersion and gas-liquid mass transfer capacity. The semicircular pipe bent blade turbine disc stirrer comprises a shaft sleeve 3, blades 5 and a disc 6, the shaft sleeve 3 is vertically and upwards arranged in the center of the disc 6, a shaft hole 4 connected with a stirring shaft is formed in the center of the shaft sleeve 3 and penetrates through the whole shaft sleeve 3 and the disc 6, a screw hole 1 and a key groove 2 are formed in the two sides of the inner wall of the shaft sleeve 3 respectively, and the screw hole 1 is perpendicular to the opening direction of the shaft hole 4. The stirrer is fixed on a stirring shaft through a bolt, the key groove 2 is a concave key groove and corresponds to a key protrusion on the stirring shaft, the shaft sleeve 3 is fixedly connected with the disc 6, the blades 5 are fixed on the disc 6 in the circumferential direction, and the blades 5 are of a semicircular bent pipe structure.

Description

Technical Field

[0001] The utility model relates to a stirrer, more specifically to a semi-circular tube curved blade turbine disc stirrer. Background Art

[0002] As a key component of the stirring equipment, the structure of the agitator will directly determine the mixing effect of the stirred reactor. According to the flow pattern generated by the agitator, it can be divided into radial flow agitators, axial flow agitators and mixed flow agitators. The disc turbine agitator is a type of turbine agitator commonly used in gas-liquid mixing, which has the characteristics of high circulation efficiency and large shear force. The stirring power of the traditional turbine disc turbine agitator will drop significantly during ventilation, which will not only affect its performance, but also has the risk of burning out the motor after the ventilation is stopped; and for some disc turbine agitators with relatively low stirring power, they will also generate high energy consumption when running at high load or for a long time, and cannot achieve a more ideal gas-liquid mixing effect. Therefore, the development of a new type of disc turbine agitator that is more energy-saving, efficient and reasonable is of great significance to improving industrial production efficiency and reducing industrial production costs. Summary of the Invention

[0003] The utility model aims to provide a semi-circular tube curved blade turbine disc stirrer, which has low energy consumption, little change in power with ventilation, and good gas dispersion and gas-liquid mass transfer capabilities.

[0004] The utility model is realized through the following technical solutions:

[0005] The utility model discloses a semicircular tube curved blade turbine disc agitator, comprising a shaft sleeve 3, blades 5 and a disc 6. The shaft sleeve 3 is vertically upwardly provided at the center of the disc 6. The shaft sleeve 3 is provided with an axial hole 4 for connecting the stirring shaft at the center. The axial hole 4 runs through the entire shaft sleeve 3 and the disc 6. A screw hole 1 and a key groove 2 are respectively provided on both sides of the inner wall of the shaft sleeve 3. The screw hole 1 is perpendicular to the opening direction of the axial hole 4. The agitator is fixed to the stirring shaft by bolts. The key groove 2 is a concave key groove corresponding to the key convex on the stirring shaft. The shaft sleeve 3 and the disc 6 are fixedly connected. The disc 6 is fixed with blades 5 along the circumferential direction. The blade 5 is in the shape of a semicircular curved tube structure.

[0006] The above-mentioned semi-circular tube curved blade turbine disc agitator of the present invention has a further technical solution that the semi-circular tube curved blades 5 are evenly distributed on the disc 6, the disc 6 and the semi-circular tube curved blades 5 are inlaid and welded, the blade part is on the disc, and the angle between the blades is 60°; the bending direction of the semi-circular tube curved blades 5 is along the rotation direction of the impeller, and each blade is bent inward, and the bending angle is 30°.

[0007] A further technical solution of the semi-circular tube curved blade turbine disc agitator of the present invention may be that the number of the semi-circular tube curved blades 5 is 6.

[0008] A further technical solution of the semi-circular tube curved blade turbine disc agitator of the present invention may be that the shaft sleeve 3 and the disc 6 are connected by welding, and the connection is processed with a rounded corner.

[0009] A further technical solution of the semi-circular tube curved blade turbine disc agitator of the present invention is that the agitator diameter is 0.3-0.5 times the inner diameter of the mixing tank. A further technical solution is that the agitator diameter is 0.31 times the inner diameter of the mixing tank, and the ratio of blade height, disc diameter, and blade diameter is 1:2.7:4.6.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The blades of the semi-circular tube curved blade turbine disc agitator of the present invention are of a semi-tube structure, and the bending direction of the blades is the direction of rotation of the blades, which reduces the pressure on the back of the blades, ensures the radial displacement and circulation efficiency of the impeller, makes the stirring power consumption low, and the stirring power changes less with ventilation, and the impeller performance is not easily damaged; the diameter of the circular tube is large, and the cross-section of the impeller is large, which can, to a certain extent, press the bubbles into the bottom of the reactor, break the rising bubbles for a second time, make the gas diffuse more evenly, and reduce the formation of dead zones. The agitator of the present invention has high stirring efficiency and reasonable structure. According to the results of numerical simulation analysis and experimental verification, the mass transfer effect of the semi-circular tube curved blade turbine disc agitator of the present invention under unit power is 24% higher than that of the traditional straight blade turbine disc agitator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 This is the main view of the utility model;

[0015] In the figure: 1-screw hole, 2-keyway, 3-sleeve, 4-shaft hole, 5-blade, 6-disc. DETAILED DESCRIPTION

[0016] like Figure 1 、 2 3, the present invention will be further described below with reference to the specific drawings.

[0017] The utility model discloses a semicircular tube curved blade turbine disc agitator, comprising a shaft sleeve 3, blades 5 and a disc 6. The shaft sleeve 3 is vertically upwardly provided at the center of the disc 6. The shaft sleeve 3 is provided with an axial hole 4 for connecting the stirring shaft at the center. The axial hole 4 runs through the entire shaft sleeve 3 and the disc 6. A screw hole 1 and a key groove 2 are respectively provided on both sides of the inner wall of the shaft sleeve 3. The screw hole 1 is perpendicular to the opening direction of the axial hole 4. The agitator is fixed to the stirring shaft by bolts. The key groove 2 is a concave key groove corresponding to the key convex on the stirring shaft. The shaft sleeve 3 and the disc 6 are fixedly connected. The disc 6 is fixed with blades 5 along the circumferential direction. The blade 5 is in the shape of a semicircular curved tube structure. The semicircular tube curved blades 5 are evenly distributed on the disc 6, and the disc 6 is inlaid and welded with the semicircular tube curved blades 5. The blade parts are on the disc, and the angle between the blades is 60°; the bending direction of the semicircular tube curved blades 5 is along the rotation direction of the impeller, and each blade is bent inwardly with a bending angle of 30°. This structure can reduce the pressure behind the blades and the shear force of the impeller when the impeller rotates, while ensuring the stirring efficiency, reducing the consumption of stirring power, and the stirring power changes less with the ventilation volume, and can show a better gas-liquid dispersion effect in gas-liquid stirring. At the same time, the diameter of the blade 5 is large, and the area of ​​the impeller cross section is larger after the blade is bent. In gas-liquid stirring, while shearing the bubbles, more rising gas can be effectively pressed into the bottom of the reactor, and then secondary crushing is performed and evenly dispersed inside the reactor, thereby improving the gas carrying capacity of the agitator and increasing the overall mass transfer effect; the number of the semicircular tube curved blades 5 is 6; the shaft sleeve 3 and the disc 6 The connection is made by welding, and the connection is processed with rounded corners; the diameter of the agitator is 0.31 times the inner diameter of the mixing tank, and the ratio of the blade height, disk diameter, and blade diameter is: 1:2.7:4.6.

[0018] In this embodiment, the inner diameter of the mechanical stirring tank used in the experiment is 700 mm, the height is 1000 mm, the actual liquid capacity is 270 L, the blade diameter is 0.31 times the inner diameter of the stirring tank, the blade height, disk diameter, and blade diameter ratio are: 1:2.7:4.6, and the blade thickness and disk thickness are both 3 mm.

[0019] The agitator of the utility model has high stirring efficiency and reasonable structure. According to the results of numerical simulation analysis and experimental verification, the mass transfer effect of the agitator of the utility model under unit power is 24% higher than that of the traditional straight-blade turbine disc agitator.

Claims

1. A semi-circular tube curved blade turbine disc stirrer, comprising a sleeve (3), blades (5) and a disc (6), wherein the sleeve (3) is vertically upwardly provided at the center of the disc (6), and a shaft hole (4) for connecting a stirring shaft is provided at the center of the sleeve (3), characterized in that: The shaft hole (4) passes through the entire shaft sleeve (3) and the disc (6). A screw hole (1) and a keyway (2) are respectively provided on both sides of the inner wall of the shaft sleeve (3). The screw hole (1) is perpendicular to the opening direction of the shaft hole (4). The agitator is fixed to the agitator shaft by bolts. The keyway (2) is a concave keyway corresponding to the key convex on the agitator shaft. The shaft sleeve (3) and the disc (6) are fixedly connected. The disc (6) is fixed with a blade (5) along the circumferential direction. The blade (5) is in the shape of a semicircular curved tube structure.

2. The semi-circular tube curved blade turbine disc agitator according to claim 1, characterized in that: The blades (5) are evenly distributed on the disk (6), and the disk (6) and the blades (5) are inlaid and welded. The blade parts are on the disk, and the angle between the blades is 60°; the bending direction of the blades (5) is along the rotation direction of the impeller, and each blade is bent inward with a bending angle of 30°.

3. The semi-circular tube curved blade turbine disc agitator according to claim 1, characterized in that: The number of the blades (5) is 6.

4. The semicircular tube curved blade turbine disc agitator according to claim 1, characterized in that: The shaft sleeve (3) and the disc (6) are connected by welding, and the connection portion thereof is processed with a rounded corner.

5. The semi-circular tube curved blade turbine disc agitator according to claim 1, characterized in that: The diameter of the stirrer is 0.3-0.5 times the inner diameter of the stirring tank.

6. The semi-circular tube curved blade turbine disc agitator according to claim 5, characterized in that: The diameter of the stirrer is 0.31 times the inner diameter of the stirring tank, and the ratio of the blade height, the disk diameter, and the blade diameter is 1:2.7:4.6.

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