Mixing equipment with forward and reverse mixing flow

Abstract

The present invention discloses a stirring device with forward and reverse cross-mixing flow, comprising a kettle, a driving assembly arranged on the kettle, and a stirring assembly arranged in the kettle, wherein the driving assembly is used to drive the stirring assembly to perform a stirring action, and the stirring assembly comprises a movable stirrer and a fixed stirrer, wherein the movable stirrer is linked with the driving assembly and driven by the driving assembly to rotate and stir; the fixed stirrer is fixed in the kettle; the material is stirred inside the kettle by the movable stirrer and the fixed stirrer, and the blades of the fixed stirrer and the movable stirrer face in opposite directions. The present invention only needs to use one driving device to realize forward and reverse cross-mixing flow, which can achieve a good stirring effect and save energy.

Description

Technical Field

[0001] The invention relates to stirring equipment, in particular to stirring equipment with forward and reverse cross-mixing flow. Background Art

[0002] At present, in the production of petroleum, fine chemicals, biopharmaceuticals and other products, high-viscosity materials are gradually increasing. Many high-molecular polymers and microbial polysaccharides show high viscosity, and most materials are non-Newtonian fluids. In the production process of many polymers, the viscosity of the material will also change, so the requirements for stirring are higher, and stirring is required to adapt to the various processes of viscosity change. When the viscosity of the material gradually increases, due to the influence of viscosity, the flow is in a laminar state, and the range of stirring action gradually decreases. The high-viscosity liquid is still stationary or flows very slowly at the place where the impeller leaves, so it is difficult to form an overall circulation flow of the solution in the kettle. There are weak areas or dead areas in the kettle, which are very unfavorable for the mixing, dispersion, heat transfer and reaction of materials. For ordinary stirring, simply increasing the stirring speed has little effect, because too high a speed will also form a channel flow inside the high-viscosity liquid, and the liquid will remain motionless at the place where the stirring paddle is left. In the process of high-viscosity microbial fermentation, the microorganisms need to be introduced into the air. After the gas is introduced, a "hole" phenomenon will form in the tank. In order to increase the stirring range, for working conditions with high-viscosity liquids, ribbon-type, screw-type stirring paddles or pan-energy stirring paddles are usually used. However, there are still problems such as insufficient stirring effect and excessive energy consumption.

[0003] The main problem facing the existing mixing equipment for high-viscosity material systems is how to meet process requirements and how to improve efficiency. That is, the mixing equipment needs to minimize the power consumption under the conditions of fluid mixing and mass transfer that can meet the process requirements. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a stirring device with forward and reverse cross-flow, which can achieve forward and reverse cross-flow with one driving device, thereby achieving a good stirring effect and saving energy.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stirring device with forward and reverse cross-flow, comprising a kettle body, a driving component arranged on the kettle body, and a stirring component arranged in the kettle body, wherein the driving component is used to drive the stirring component to perform a stirring action, and the stirring component comprises a movable agitator and a fixed agitator, wherein the movable agitator is linked with the driving component and driven by the driving component to rotate and stir; the fixed agitator is fixed in the kettle body; the material is stirred inside the kettle body by the movable agitator and the fixed agitator, and the blades of the fixed agitator and the movable agitator face in opposite directions.

[0006] As a further improvement of the present invention, the stirring assembly also includes a first stirring shaft and a second stirring shaft, the first stirring shaft is linked to the driving assembly and is fixedly connected to the movable agitator; when the driving assembly drives the first stirring shaft to rotate, the first stirring shaft drives the movable agitator to rotate; the second stirring shaft is fixed in the kettle body, and the fixed agitator is installed on the second stirring shaft.

[0007] As a further improvement of the present invention, the number of the fixed agitators and the number of the movable agitators are both multiple, and the multiple fixed agitators and the multiple movable agitators are staggered in the up and down directions.

[0008] As a further improvement of the present invention, one end of the second stirring shaft is fixedly connected to the bottom of the kettle body, and the other end is rotatably connected to the movable stirrer.

[0009] As a further improvement of the present invention, one end of the second stirring shaft connected to the movable stirrer is assembled with the movable stirrer via a bearing.

[0010] As a further improvement of the present invention, one or more of the movable agitators close to the driving assembly are fixedly connected to the first agitator shaft; and the remaining movable agitators are rotatably connected to the second agitator shaft.

[0011] As a further improvement of the present invention, a plurality of the fixed agitators and a plurality of movable agitators arranged alternately in the up and down directions are installed on the second agitator shaft.

[0012] As a further improvement of the present invention, the movable agitator rotatably connected to the second agitator shaft is mounted to the second agitator shaft via a bearing.

[0013] Beneficial effects of the present invention:

[0014] 1. It has efficient mixing and energy-saving effects, and also helps to reduce costs;

[0015] 2. Under the same motor power conditions, it can have better stirring effect;

[0016] 3. Under the same stirring effect, a smaller motor power can be used to achieve energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the stirring assembly of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection structure between the first stirring shaft and the movable stirrer of the present invention;

[0020] Figure 4 This is another schematic diagram of the connection structure between the first stirring shaft and the movable stirrer of the present invention.

[0021] Reference numerals: 1, kettle body; 2, driving assembly; 3, stirring assembly; 31, movable stirrer; 32, fixed stirrer; 33, first stirring shaft; 34, second stirring shaft. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the embodiments given in the accompanying drawings.

[0023] Reference Figure 1-4 As shown,

[0024] A stirring device with forward and reverse cross-flow comprises a kettle body 1, a driving component 2 arranged on the kettle body 1, and a stirring component 3 arranged in the kettle body 1, wherein the driving component 2 is used to drive the stirring component 3 to perform a stirring action, and is characterized in that the stirring component 3 comprises a movable stirrer 31 and a fixed stirrer 32, the movable stirrer 31 is linked with the driving component 2, and is driven by the driving component 2 to rotate and stir; the fixed stirrer 32 is fixed in the kettle body 1; the material is stirred inside the kettle body 1 by the movable stirrer 31 and the fixed stirrer 32, and the blades of the fixed stirrer 32 and the movable stirrer 31 are in opposite directions.

[0025] The driving assembly 2 is composed of a motor and mounting components around it. The motor is mounted on the kettle body 1 through the mounting components and is linked with the movable stirrer 31. Specifically, power can be transmitted through the cooperation of a rotating shaft and a coupling.

[0026] In the above scheme, when the driving component 2 is working, the movable stirrer 31 is driven to rotate and perform stirring action, and cooperates with the fixed stirrer 32, when the movable stirrer 31 is stirring, a relative positive and negative mixing effect can be generated between the two, and positive and negative mixing can be achieved through a driving component 2 (i.e., a motor), which has efficient stirring and mixing effects and energy-saving effects, and also helps to reduce costs. It can also be known that under the same motor power conditions, a better stirring effect can be achieved, and under the same stirring effect, a smaller motor power can be used to achieve energy-saving effects.

[0027] Furthermore, the stirring assembly 3 also includes a first stirring shaft 33 and a second stirring shaft 34. The first stirring shaft 33 is linked to the driving assembly 2 and is fixedly connected to the movable agitator 31. When the driving assembly 2 drives the first stirring shaft 33 to rotate, the first stirring shaft 33 drives the movable agitator 31 to rotate. The second stirring shaft 34 is fixed in the kettle body 1, and the fixed agitator 32 is installed on the second stirring shaft 34.

[0028] The stirring assembly 3 further divides the stirring shaft into a first stirring shaft 33 linked to the driving assembly 2 and a second stirring shaft 34 that is fixed. The fixed stirrer 32 is fixedly installed on the second stirring shaft 34, which can achieve a fixing effect and form a positive and negative cross-flow mixing with the first stirring shaft 33. This fixing method has a simple structure and is easy to install. As shown in the figure, it is best that there is a gap between the first stirring shaft 33 and the second stirring shaft 34, and the two are separated.

[0029] During the stirring process, the kettle body 1 is fixed, wherein the second stirring shaft 34 is fixed in the kettle body 1 and can be in a fixed state together with the kettle body 1 , the first stirring shaft 33 and the second stirring shaft 34 are distributed up and down, and the first stirring shaft 33 and the second stirring shaft 34 are preferably coaxially arranged.

[0030] In a further configuration, the number of the fixed agitators 32 and the number of the movable agitators 31 are both multiple, and the multiple fixed agitators 32 and the multiple movable agitators 31 are alternately arranged in the up and down direction.

[0031] As shown in the drawing, there are multiple movable agitators 31 and fixed agitators 32, which are arranged in a staggered manner in coordination with each other, and can provide the best forward and reverse cross-flow stirring effect, and make the stirring effect more uniform.

[0032] Preferably, one end of the second stirring shaft 34 is fixedly connected to the bottom of the kettle body 1, and the other end is rotatably connected to the movable stirrer 31.

[0033] The second stirring shaft 34 serves as a fixed shaft, one end of which is rotatably connected to the movable stirrer 31, which means that the two ends of the second stirring shaft 34 are stabilized by the kettle body 1 and the movable stirrer 31 respectively, which can avoid the problem of excessive swinging of the second stirring shaft 34 during the stirring process and make the stirring action more stable.

[0034] In fact, the first stirring shaft 33 and the second stirring shaft 34 are preferably arranged in the vertical direction, and the positions of the first stirring shaft 33 and the second stirring shaft 34 can be changed according to the position of the driving component 2. For example, if the driving component 2 is located at the bottom, the first stirring shaft 33 is also placed at the bottom. If the driving component 2 is located at the top, the first stirring shaft 33 is also located at the top.

[0035] The end of the second stirring shaft 34 connected to the movable stirrer 31 is preferably assembled with the movable stirrer 31 through a bearing.

[0036] Since the movable agitator 31 and the second agitator shaft 34 are movably connected and matched by means of bearings, the movable agitator 31 can rotate more smoothly and provide sufficient stability to the second agitator shaft 34.

[0037] In addition, it should be noted that Figure 3 and 4 As shown, one or more movable agitators 31 close to the driving assembly 2 are fixedly connected to the first agitator shaft 33 ; the remaining movable agitators 31 are rotatably connected to the second agitator shaft 34 .

[0038] Generally speaking, there can be several movable agitators 31 near the driving assembly 2, all of which are fixedly connected to the first agitator shaft 33, which can improve the strength under the driving action. Multiple movable agitators 31 can withstand greater torque when they are stressed together.

[0039] The staggered arrangement between the fixed agitators 32 and the movable agitators 31 mentioned above will be described in more detail below.

[0040] A plurality of fixed agitators 32 and a plurality of movable agitators 31 arranged alternately in the up-down direction are mounted on the second agitator shaft 34 .

[0041] Since the first stirring shaft 33 and the second stirring shaft 34 have different properties, the staggered arrangement can be performed on the second stirring shaft 34 , which is more convenient for installation.

[0042] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A stirring device with forward and reverse mixed flow, comprising a kettle, a driving assembly arranged on the kettle, and a stirring assembly arranged in the kettle, wherein the driving assembly is used to drive the stirring assembly to perform stirring action, characterized in that: The stirring assembly includes a movable stirrer and a fixed stirrer, wherein the movable stirrer is linked with the driving assembly and is driven by the driving assembly to rotate and stir; The fixed stirrer is fixed in the kettle body; the material in the kettle body is stirred by the movable stirrer and the fixed stirrer, and the blades of the fixed stirrer and the movable stirrer face in opposite directions; The stirring assembly further includes a first stirring shaft and a second stirring shaft, wherein the first stirring shaft is linked to the driving assembly and fixedly connected to the movable stirrer; when the driving assembly drives the first stirring shaft to rotate, the first stirring shaft drives the movable stirrer to rotate; the second stirring shaft is fixed in the kettle body, and the fixed stirrer is mounted on the second stirring shaft; The number of the fixed agitators and the number of the movable agitators are both multiple, and the multiple fixed agitators and the multiple movable agitators are staggered in the vertical direction; A plurality of fixed stirrers and a plurality of movable stirrers arranged alternately in the up and down directions are installed on the second stirring shaft.

2. The stirring device according to claim 1, characterized in that One end of the second stirring shaft is fixedly connected to the kettle body, and the other end is rotatably connected to the movable stirrer.

3. The stirring device according to claim 2, characterized in that One end of the second stirring shaft connected to the movable stirrer is assembled with the movable stirrer through a bearing.

4. The stirring device according to claim 1, characterized in that One or more movable agitators close to the driving assembly are fixedly connected to the first agitator shaft; the remaining movable agitators are rotatably connected to the second agitator shaft.

5. The stirring device according to claim 4, characterized in that: The movable stirrer rotatably connected to the second stirring shaft is installed with the second stirring shaft through a bearing.

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