Stirring kettle

Abstract

The utility model relates to the field of chemical equipment, in particular to a stirring kettle, which is characterized in that a blind cavity (102) protruding outwards along the central axis direction of a kettle body is arranged at the central position of the bottom of the kettle body (1) of the stirring kettle, and the blind cavity is connected with an inner cavity of the kettle body. The stirring kettle further comprises a stirring module, the stirring module comprises a stirring shaft (105) vertically arranged in the center of the kettle body and a driving device (104) which is arranged at the top of the kettle body and is in transmission connection with the stirring shaft, and the bottom end of the stirring shaft is connected with a stirring extension device extending into the blind cavity. In the working process, the driving device in the stirring module drives the stirring shaft to rotate, so that the stirring extension device is driven to rotate, and reaction materials in the blind cavity are stirred. Through the installed stirring extension device, the stirring range of the stirring kettle is expanded, and solid materials deposited in the blind cavity at the bottom of the kettle can be stirred, so that the output rate and purity of reaction products can be improved while material waste is avoided.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a stirring kettle. Background Art

[0002] In industrial production, especially in the field of chemical production, stirred tanks are widely used in stirring process flows. In addition to mixing materials evenly, they also have the functions of enhancing heat and mass transfer, accelerating reactions in stirred tanks and making them react fully. They can be applied to solid-liquid reactions, liquid-liquid reactions, gas-liquid reactions and gas-liquid-solid three-phase reactions.

[0003] In the production of catalysts, a stirred tank is required as a container for material mixing and reaction. The stirring device in the stirred tank usually uses a cantilevered stirring shaft, the upper part of which is fixed in the top structure of the stirred tank, and the lower part is suspended in the stirred tank. The lower part is also provided with stirring paddles extending oppositely in the axial direction of the stirring shaft. The bottom of the stirred tank in the prior art is usually a tapered structure. Therefore, in order to avoid damage caused by collision between the stirring paddle and the wall of the stirred tank, the length of the stirring shaft can only be set at a certain height from the bottom of the stirred tank. When the stirring shaft set in this way performs a solid-liquid reaction in the stirred tank to produce a catalyst, the dense solid reaction material will be deposited at the bottom and difficult to be stirred, resulting in insufficient reaction and waste of solid reaction material. When producing solid catalysts, the solid reaction material deposited at the bottom will also affect the purity of the final output catalyst.

[0004] Therefore, a stirring tank with a stirring range large enough to stir the solids deposited at the bottom of the stirring tank can be stirred up and fully participate in the reaction. Utility Model Content

[0005] The utility model aims to overcome the problem that the stirring device in the stirring kettle in the prior art is difficult to stir the solid reaction deposited at the bottom of the stirring kettle.

[0006] In order to facilitate the insertion of materials, the bottom of the stirring tank used in industrial production is provided with a cavity located in the middle of the bottom of the stirring tank, which is smaller in diameter than the stirring tank and extends downward independently. This cavity is called a blind cavity, and a bottom valve is installed at the bottom of the blind cavity. Through the blind cavity, materials can be put in and taken out from the bottom of the stirring tank. Especially for gas-phase reactants, adding materials through the bottom blind cavity can better prevent material waste during the addition process. However, in the actual reaction process, since the diameter of the blind cavity structure is smaller than the diameter of the stirring tank, the height of the stirring paddle in the stirring tank must be slightly higher than the bottom of the stirring tank. The solid reaction materials with high density are easily deposited in the blind cavity structure without being stirred, thereby increasing the reaction time. The deposited solid materials that have not reacted completely will also affect the quality of the output catalyst product.

[0007] Therefore, in order to achieve the purpose of the utility model, the utility model provides a stirring kettle, wherein a blind cavity protruding outward along the central axis of the kettle body is arranged at the center of the bottom of the kettle body, and the blind cavity is connected to the inner cavity of the kettle body. The stirring kettle also includes a stirring module, which includes a stirring shaft vertically arranged at the center of the kettle body and a driving device arranged at the top of the kettle body and connected to the stirring shaft, and the bottom end of the stirring shaft is connected to a stirring extension device extending into the blind cavity.

[0008] Preferably, a bottom valve that can be switched between an open state and a closed state is provided at the bottom of the blind cavity.

[0009] Preferably, the stirring module further comprises at least one stirring paddle arranged in the radial direction of the stirring shaft.

[0010] Preferably, the stirring extension device includes a hoop portion and a stirring portion. The hoop portion is connected to the bottom end of the stirring shaft and includes at least two hoop petals and a connecting plate connected to each other. The stirring portion includes a connecting blade, a pressing plate and a stirring blade, wherein the stirring blade at least partially extends into the blind cavity, the upper end of the connecting blade is connected to the hoop portion through the connecting plate, and the lower end is connected to the stirring blade through the pressing plate.

[0011] Preferably, the clamp part also includes a first screw, a plurality of clamp petals are arranged around the stirring shaft, and adjacent clamp petals are detachably connected by the first screw, so that the clamp petals can be tightened and clamped on the stirring shaft by tightening the first screw 7.

[0012] Preferably, the connecting plates correspond to the hoop petals one by one, and each connecting plate is connected to the hoop petals and the connecting blades through a first bolt, a flat washer and a spring washer, respectively.

[0013] Preferably, the upper end of the connecting blade has a cylindrical outer contour, and the lower end is a cross-shaped blade. When the stirring extension device is installed on the stirring shaft, the end of the stirring shaft abuts against the upper end of the connecting blade.

[0014] Preferably, the pressing plate is detachably connected between the connecting blade and the stirring blade.

[0015] Preferably, the size of the stirring blade is set so that it can extend into the blind cavity without contacting the inner wall of the blind cavity.

[0016] Preferably, the hoop portion, the stirring portion and the stirring shaft are coaxially arranged with each other.

[0017] When the stirring kettle in the above technical solution is working, the driving device in the stirring module drives the stirring shaft to rotate and stirs the contents in the stirring kettle. The stirring extension device installed at one end of the bottom of the stirring shaft can extend into the blind cavity and rotate under the drive of the stirring shaft, thereby stirring the reaction materials in the blind cavity. By installing the stirring module with the stirring extension device, the stirring range of the stirring kettle is expanded, and the solid materials deposited in the blind cavity at the bottom of the kettle can be stirred, thereby preventing the deposition of solid reaction materials, avoiding material waste and improving the yield and purity of the reaction product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0019] Figure 2 This is a schematic diagram of the axonometric structure of an embodiment of the utility model;

[0020] Figure 3 It is a front view structural schematic diagram of an embodiment of the utility model;

[0021] Figure 4 It is a side view structural schematic diagram of an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of a stirring blade in one embodiment of the utility model.

[0024] Description of Reference Numerals

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] 1. Clamp petal; 101. Kettle body; 102. Blind cavity; 103. Bottom valve; 104. Driving device; 105. Stirring shaft; 106. Stirring paddle; 2. First bolt; 3. Flat washer; 4. Spring washer; 5. Connecting plate; 6. Connecting blade; 7. First screw; 8. Second bolt; 9. First nut; 10. Pressing plate; 11. Stirring blade. DETAILED DESCRIPTION

[0027] In the present utility model, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0028] The utility model provides a stirring kettle, such as Figure 1 As shown, a blind cavity 102 protruding outward along the central axis of the kettle body 101 is provided at the bottom center of the kettle body 101 of the stirring kettle, and the blind cavity 102 is connected to the inner cavity of the kettle body 101. The stirring kettle also includes a stirring module, which includes a stirring shaft 105 vertically arranged at the center of the kettle body 101 and a driving device 104 arranged at the top of the kettle body 101 and connected to the stirring shaft 105 by transmission, and the bottom end of the stirring shaft 105 is connected to a stirring extension device extending into the blind cavity 102.

[0029] When the stirring kettle is working, the driving device 104 in the stirring module drives the stirring shaft 105 to rotate and stir the contents in the stirring kettle. The stirring extension device installed at one end of the bottom of the stirring shaft 105 can extend into the blind cavity 102 and rotate under the drive of the stirring shaft 105, thereby stirring the reaction materials in the blind cavity 102. Through the stirring module equipped with the stirring extension device, the stirring range of the stirring kettle is expanded to be able to stir the solid materials deposited in the blind cavity 102 at the bottom of the kettle, thereby preventing the deposition of solid reaction materials, avoiding material waste and improving the yield and purity of the reaction product.

[0030] Preferably, a reducer is provided in the driving device 104 in the stirring module, and the speed of the driving device 104 can be adjusted by setting the gear ratio of the gears in the reducer, thereby adjusting the rotation speed of the stirring shaft 105 to adapt to various reactions requiring different stirring speeds.

[0031] Preferably, Figure 1 As shown, a bottom valve 103 that can be switched between an open state and a closed state is provided at the bottom of the blind cavity 102. Through the switchable bottom valve 103, the top of the kettle body 101 can be kept open, and the feeding and discharging operations can be performed through the bottom valve 103. For gaseous reaction materials, adding through the bottom valve 103 is also conducive to their full mixing and contact with other materials in the stirring kettle so that the reaction can be fully carried out.

[0032] Preferably, Figure 1As shown, the stirring module further includes at least one stirring paddle 106 arranged in the radial direction of the stirring shaft 105. By means of the at least one stirring paddle 106 arranged in the radial direction of the stirring shaft 105, the stirring shaft 105 can be driven when the stirring shaft 105 rotates, thereby stirring the reaction materials. Moreover, because the stirring paddle 106 is arranged in the radial direction of the stirring shaft 105, more reaction materials can be stirred when the stirring paddle 106 is driven to rotate, and more reaction materials in the stirring tank are driven to fully contact and participate in the reaction, thereby improving the reaction efficiency of the reaction materials in the stirring tank and the utilization rate of the reaction materials.

[0033] Preferably, Figure 2 As shown, the stirring extension device includes a hoop portion and a stirring portion. The hoop portion is connected to the bottom end of the stirring shaft 105, and includes at least two hoop petals 1 and a connecting plate 5 that are connected to each other. The stirring portion includes a connecting blade 6, a pressing plate 10 and a stirring blade 11, and the stirring blade 11 at least partially extends into the blind cavity 102. The upper end of the connecting blade 6 is connected to the hoop portion through the connecting plate 5, and the lower end is connected to the stirring blade 11 through the pressing plate 10. The interconnected hoop petals 1 of the hoop portion are surrounded by a circle, and the hoop is around the stirring shaft 105, so that the stirring extension device can be fixedly installed on the stirring shaft 105. When the stirring extension device is fixedly installed on the stirring shaft 105, the connecting blade 6, the pressing plate 10 and the stirring blade 11 in the stirring portion serve as an extension of the stirring shaft 105, and rotate with the rotation of the stirring shaft 105 to stir the part below the stirring shaft 105, thereby expanding the stirring range of the stirring module. The stirring blade 11 that can partially extend into the blind cavity 102 can also stir the reaction materials in the blind cavity 102 below the stirring shaft 105, thereby preventing the solid reaction materials from being deposited in the blind cavity 102 and not participating in the reaction. The stirring extension device can fully carry out the reaction in the stirring tank, thereby effectively shortening the reaction time, improving the utilization of the reaction materials, and improving the purity of the reaction products.

[0034] Preferably, Figure 2 , Figure 3 and Figure 4As shown, the hoop portion further includes a first screw 7, and a plurality of hoop petals 1 are arranged around the stirring shaft 105, and adjacent hoop petals 1 are detachably connected by the first screw 7, so that the hoop petals 1 can be tightened and clamped on the stirring shaft 105 by tightening the first screw 7. The first screw 7 detachably connects each hoop petal 1. When one of the hoop petals 1 fails and is damaged, the hoop portion can be quickly repaired and replaced by removing the first screw 7. When installing the stirring extension device, first loosen each first screw 7 to loosen the hoop portion to a diameter greater than the diameter of the end of the stirring shaft 105, then install the hoop portion on the end of the stirring shaft 105, and then tighten each first screw 7 to reduce the distance between each hoop petal 1, so that each hoop petal 1 generates radial pressure on the stirring shaft 105, thereby increasing the friction between each hoop petal 1 and the stirring shaft 105, so that the stirring extension device can stably clamp on the end of the stirring shaft 105.

[0035] Preferably, Figure 2 and Figure 5 As shown, the connecting plates 5 correspond to the hoop petals 1 one by one, and each connecting plate 5 is connected to the hoop petals 1 and the connecting blades 6 through the first bolts 2, flat washers 3 and spring washers 4. When the hoop of the hoop part is installed at the end of the stirring shaft 105, the stirring part connected to it through the connecting plates 5 can be stably installed and rotate with the stirring shaft 105. By using the flat washers 3, the surface area of ​​the first bolts 2 in contact with the connection can be increased to enhance the locking effect. By using the spring washers 4, a pre-tightening force can be provided for the bolt connection to prevent the first bolts 2 from loosening during the stirring process.

[0036] Preferably, Figure 2 , Figure 3 and Figure 4As shown, the upper end of the connecting blade 6 has a cylindrical outer contour, and the lower end is a cross blade. When the stirring extension device is installed on the stirring shaft 105, the end of the stirring shaft 105 abuts against the upper end of the connecting blade 6. When the hoop part is completely clamped on the stirring shaft 105, the cylindrical outer contour of the upper end of the connecting blade 6 is the same as the diameter of the circle surrounded by the outside of each hoop petal 1, so that the connecting plate 5 will not be subjected to the tensile force in the radial direction of the connecting blade 6 and stretched due to the inconsistency of the shapes of each hoop petal 1 and the upper end of the connecting blade 6 when the stirring extension device is installed, which helps the connecting plate 5 to better cope with the interference of forces from all directions during the stirring process. The cross blade structure at the lower end of the connecting blade 6 is stable and not easy to bend under force. It can keep the connecting blade 6 and the stirring blade 11 connected to it still maintain their shape when subjected to force during the stirring process without being bent, thereby ensuring the stirring effect. The connecting blade 6 abutting against the end of the stirring shaft 105 increases the rigidity of the connection between the stirring extension device and the stirring shaft 105, and reduces the influence of forces from all directions on the connecting plate 5 during the stirring process by shortening the distance between the clamp petal 1 and the connecting blade 6, so that the stirring extension device can withstand a greater stirring speed without deformation, thereby ensuring the stable stirring process of the stirring kettle.

[0037] Preferably, Figure 2 and Figure 4 As shown, the pressing plate 10 is detachably connected between the connecting blade 6 and the stirring blade 11. The pressing plate 10 is detachably connected to the connecting blade 6 and the stirring blade 11 through the second bolt 8 and the first nut 9, so that the stirring blade 11 can be quickly and conveniently replaced when the stirring blade 11 is damaged. By using the pressing plate 10, the surface area of ​​the connecting blade 6 and the stirring blade 11 connected to the second bolt 8 and the first nut 9 can be increased, thereby enhancing the locking effect and preventing the stirring blade 11 from falling off. In addition, a flat washer 3 and a spring washer 4 can also be provided between the second bolt 8 and the first nut 9 and the connecting blade 6.

[0038] Preferably, the size of the stirring blade 11 is set so that it can extend into the blind cavity 102 without contacting the inner wall of the blind cavity 102. By means of the stirring blade 11 that can extend into the blind cavity 102, the reaction materials, especially the solid reaction materials, deposited in the blind cavity 102 can be stirred, so as to prevent the deposited solid reaction materials from not participating in the reaction due to the inability to contact with other materials, thereby causing the problem of insufficient reaction in the stirring tank, and the reaction materials being mixed in the output, resulting in a decrease in the quality of the output. The stirring blade 11 that does not contact the inner wall of the blind cavity 102 can also not contact the inner wall of the blind cavity 102 during the stirring process, thereby preventing the stirring blade 11 from being damaged due to collision with the inner wall of the blind cavity 102 during the stirring process.

[0039] In some embodiments, Figure 6As shown, when the diameter of the blind cavity 102 is smaller than the diameter of the stirring shaft 105, a stirring blade 11 whose lower end width is smaller than the upper end can be used, so that the stirring blade 11 can extend into the blind cavity 102 for stirring without touching the inner wall of the blind cavity 102 during the stirring process, thereby ensuring sufficient reaction in the stirring kettle.

[0040] Preferably, the stirring blade 11 is made of polytetrafluoroethylene. The stirring blade 11 supported by polytetrafluoroethylene is insoluble in various organic solvents, has an operating temperature range that can cover the chemical reactions that the stirring kettle is used for, and has corrosion resistance, so that the stirring kettle can be applied to a variety of chemical reactions and working conditions.

[0041] Preferably, the hoop portion, the stirring portion and the stirring shaft 105 are coaxially arranged with each other. The coaxial arrangement can make the center of gravity of the hoop portion, the stirring portion and the stirring shaft 105 located on the central axis of the stirring shaft 105, and the structures on the hoop portion and the stirring portion are symmetrical with the central axis of the stirring shaft 105, so as to ensure that when the stirring shaft 105 rotates, the stirring extension device installed thereon will not affect the center of gravity of the stirring shaft 105 and cause deflection.

[0042] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A stirred tank, characterized in that: include: A kettle body (101), wherein a blind cavity (102) protruding outwards along the central axis of the kettle body (101) is provided at the bottom center of the kettle body (101), and the blind cavity (102) is communicated with the inner cavity of the kettle body (101); and A stirring module, comprising a stirring shaft (105) vertically arranged at the center of the kettle body (101) and a driving device (104) arranged at the top of the kettle body (101) and connected to the stirring shaft (105) in a transmission manner, wherein the bottom end of the stirring shaft (105) is connected to a stirring extension device extending into the blind cavity (102).

2. A stirred tank as claimed in claim 1, characterized in that: A bottom valve (103) capable of switching between an open state and a closed state is arranged at the bottom of the blind cavity (102).

3. A stirred tank as claimed in claim 1, characterized in that: The stirring module further comprises at least one stirring paddle (106) arranged in the radial direction of the stirring shaft (105).

4. A stirred tank as claimed in claim 1, characterized in that: The stirring and extending device comprises: A hoop portion, which is connected to the bottom end of the stirring shaft (105) and comprises at least two hoop petals (1) and a connecting plate (5) connected to each other; and A stirring portion, comprising a connecting blade (6), a pressing plate (10) and a stirring blade (11) at least partially extending into the blind cavity (102), wherein the upper end of the connecting blade (6) is connected to the clamping hoop portion via the connecting plate (5), and the lower end is connected to the stirring blade (11) via the pressing plate (10).

5. A stirred tank as claimed in claim 4, characterized in that: The clamp portion further comprises a first screw (7), a plurality of the clamp petals (1) are arranged around the stirring shaft (105), and adjacent clamp petals (1) are detachably connected via the first screw (7), so that the clamp petals (1) can be tightened and clamped onto the stirring shaft (105) by tightening the first screw (7).

6. A stirred tank as claimed in claim 4, characterized in that: The connecting plates (5) correspond to the hoop petals (1) one by one, and each connecting plate (5) is connected to the hoop petals (1) and the connecting blades (6) respectively through a first bolt (2), a flat washer (3) and a spring washer (4).

7. A stirred tank as claimed in claim 4, characterized in that: The upper end of the connecting blade (6) has a cylindrical outer contour, and the lower end is a cross-shaped blade. When the stirring extension device is installed on the stirring shaft (105), the end of the stirring shaft (105) abuts against the upper end of the connecting blade (6).

8. A stirred tank as claimed in claim 4, characterized in that: The pressing plate (10) is detachably connected between the connecting blade (6) and the stirring blade (11).

9. A stirred tank as claimed in claim 4, characterized in that: The size of the stirring blade (11) is set so that it can extend into the blind cavity (102) without contacting the inner wall of the blind cavity (102).

10. A stirred tank as claimed in claim 4, characterized in that: The hoop portion, the stirring portion and the stirring shaft (105) are coaxially arranged with each other.

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