Stirring device of reaction kettle

Abstract

The utility model provides a reaction kettle stirring device which comprises a reaction kettle body, a main shaft and a motor, the main shaft comprises an upper shaft and a lower shaft which are connected through a ratchet coupling, a rotating speed difference exists between the upper shaft and the lower shaft, a first stirrer is arranged outside the upper shaft, a second stirrer is arranged outside the lower shaft, the first stirrer is located on the middle upper portion of a tank body, and the second stirrer is located on the middle lower portion of the tank body. The main shaft is of a horizontally-arranged straight rod structure, the second stirrers are located on the lower middle portion of the tank body and are of a special-shaped structure, and the multiple second stirrers are arranged on the main shaft in a surrounding mode. The main shaft comprises the upper shaft and the lower shaft, and the upper shaft and the lower shaft are connected through the ratchet coupling, so that the rotating speed difference exists between the upper shaft and the lower shaft, the rotating speed difference also exists between the first stirrer and the second stirrer, a non-uniform stirring form is formed, and the vortex form caused by the speed difference is changed; therefore, the liquid is mixed more sufficiently, and the stirring effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a stirring device for a reaction kettle. Background Art

[0002] Reactors are broadly understood as containers for physical or chemical reactions. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized. Reactors are widely used in the fields of petroleum, chemical industry, rubber, pesticides, dyes, medicine and food. They are pressure vessels used to complete processes such as vulcanization, nitration, hydrogenation, hydrocarbonization, polymerization, condensation, etc., such as reactors, reaction pots, decomposition pots, polymerization kettles, etc.; the materials are generally carbon manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloys and other composite materials.

[0003] The reactor is a comprehensive reaction vessel. The design of the reactor structure, function and accessories is based on the reaction conditions. From the initial feeding-reaction-discharging, the pre-set reaction steps can be completed with a high degree of automation, and the important parameters such as temperature, pressure, mechanical control (stirring, blasting, etc.), reactant / product concentration, etc. in the reaction process are strictly regulated. Its structure is generally composed of a kettle body, a transmission device, a stirring device, a heating device, a cooling device, and a sealing device. Corresponding auxiliary equipment: fractionation column, condenser, water separator, collection tank, filter, etc.

[0004] When the reactor is running, the various mixed materials usually added will have poor dissolution effect. When they cannot be effectively dissolved, the sediment will block the valve at the bottom of the reactor. In the long run, the accumulation at the bottom will become more and more difficult to dissolve effectively, affecting the stirring effect and the ratio of each agent. The stirring paddle currently used in the reactor is difficult to play the role of floating liquid, resulting in the inability to dissolve the mixed reactants at the bottom, and the mixing effect is average. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a reactor stirring device, which solves the problems of material accumulation at the bottom of the reactor and difficulty in mixing and dissolving in the prior art, thereby improving the stirring effect and enabling the reactor to produce a better mixed liquid in actual use.

[0006] According to an embodiment of the utility model, a reactor stirring device includes a reactor body, a main shaft arranged inside the reactor body, and a motor arranged on the top of the reactor body, the motor drives the main shaft to rotate axially, the main shaft includes an upper shaft and a lower shaft, the upper shaft and the lower shaft are connected by a ratchet coupling so that there is a speed difference between the two, a first agitator is arranged on the outside of the upper shaft, and a second agitator is arranged on the outside of the lower shaft, the first agitator is located in the upper and middle part of the tank body, and is a horizontally arranged straight rod structure, the second agitator is located in the lower and middle part of the tank body, and is a special-shaped structure, and a plurality of second agitators are arranged around the main shaft.

[0007] Furthermore, the first agitator includes two coaxially arranged straight rods, which are symmetrically arranged at the middle and upper part of the reactor body perpendicular to the main axis, and the length of the straight rod is less than the maximum distance between the agitating section and the main axis.

[0008] Furthermore, the second agitator includes a stirring section and a connecting section. The stirring section is bent and is arranged close to the inner side surface and inner bottom surface of the reactor body. The bottom end is connected to the main shaft, and the top end extends along the inner wall of the reactor body to the middle of the reactor body. The connecting section is connected and fixed to the top of the stirring section.

[0009] Furthermore, the motor is arranged on the top of the reactor body, the output shaft of the motor is arranged downward and coaxial with the reactor body, and the output shaft of the motor is detachably connected to the upper shaft by a coupling.

[0010] Furthermore, the bottom end of the lower shaft is rotatably connected to the reactor body, and a bracket is sleeved on the outside of the bottom end of the lower shaft. The top of the bracket is rotatably connected to the lower shaft through a bearing, and the bottom of the bracket is fixedly connected to the inner bottom surface of the reactor body.

[0011] Furthermore, the bottom of the stirring section is bent upward near the main axis to avoid the area where the bracket is located.

[0012] Furthermore, an extension section is provided at the top of the stirring section, and the extension section extends upward from a connection point between the stirring section and the connection section, and the extension section is arranged close to the inner wall of the reactor body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The main shaft in the utility model includes an upper shaft and a lower shaft, and the upper shaft and the lower shaft are connected by a ratchet coupling, so that there is a speed difference between the two, so there is also a speed difference between the first agitator and the second agitator, thereby forming an uneven stirring form, and the vortex form caused by the speed difference changes, which makes the liquid mixed more fully, and the "impact" feeling of the liquid is stronger, thereby improving the stirring effect;

[0015] 2. The utility model includes a first agitator and a second agitator, wherein the first agitator is arranged in the middle and upper part of the reactor body. When rotating, the liquid inside the reactor evenly generates eddies that roll toward the inner wall and downward. At the same time, the second agitator arranged in the middle and lower part of the reactor body causes the internal liquid to generate eddies that roll toward the inner wall and upward. The two eddies collide on the inner wall and the middle part of the reactor body, and have better stirring and mixing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side schematic diagram of the internal structure of an embodiment of the utility model.

[0017] Figure 2 It is a schematic top view of the internal structure of an embodiment of the utility model.

[0018] Figure 3 It is a side schematic diagram of the main shaft, the first agitator and the second agitator in an embodiment of the utility model.

[0019] In the above drawings: 1, reactor body; 2, main shaft; 3, motor; 4, first agitator; 5, second agitator; 6, bracket; 21, upper shaft; 22, lower shaft; 23, ratchet coupling; 31, coupling; 51, stirring section; 52, connecting section; 53, extension section. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, the embodiment of the utility model proposes a stirring device for a reactor body 1, comprising a reactor body 1, a main shaft 2 arranged inside the reactor body 1, and a motor 3 arranged on the top of the reactor body 1, wherein the motor 3 drives the main shaft 2 to rotate axially.

[0022] like Figure 2 As shown, the main shaft 2 includes an upper shaft 21 and a lower shaft 22, and the upper shaft 21 and the lower shaft 22 are connected by a ratchet coupling 23, so that there is a speed difference between the two. Further, the motor 3 is arranged on the top of the reactor body 1, and the output shaft of the motor 3 is arranged downward and coaxial with the reactor body 1, and the output shaft of the motor 3 is detachably connected to the upper shaft 21 by a coupling 31. The rotation direction of the motor 3 is clockwise, and the motor 3 uses a variable frequency speed regulating motor 3, and its rotation speed is accelerated from slow to fast step by step. The bottom end of the lower shaft 22 is rotatably connected to the reactor body 1, and the outer part of the bottom end of the lower shaft 22 is also sleeved with a bracket 6, the top of the bracket 6 is rotatably connected to the lower shaft 22 through a bearing, and the bottom of the bracket 6 is fixedly connected to the inner bottom surface of the reactor body 1.

[0023] In the specific scheme of this embodiment, the upper shaft 21 is interference-fitted with the coupling 31 and with one end of the ratchet coupling 23, thereby achieving a stable connection and preventing swinging during rotation. Correspondingly, the top end of the lower shaft 22 is interference-fitted with the ratchet coupling 23, and the bottom end is connected to the bottom of the reactor through a sleeve, thereby rotating concentrically with the ratchet.

[0024] like Figure 3 As shown, a first agitator 4 is arranged on the outside of the upper shaft 21, and a second agitator 5 is arranged on the outside of the lower shaft 22. The first agitator 4 is located in the upper middle part of the tank body and is a horizontally arranged straight rod structure. The second agitator 5 is located in the lower middle part of the tank body and is a special-shaped structure, and three second agitators 5 are arranged around the main shaft 2.

[0025] The first agitator 4 includes two coaxially arranged straight rods, which are symmetrically arranged at the middle and upper part of the reactor body 1 perpendicular to the main axis 2, and the length of the straight rods is less than the maximum distance between the stirring section 51 and the main axis 2. Specifically, the first agitator 4 is a common stirring paddle currently on the market, which is welded with stainless steel angle steel, with a sleeve in the middle, and a set of M10 bolts in the middle of the sleeve. The first agitator 4 can be used to stir the liquid by rolling it downward toward the tank body.

[0026] Correspondingly, the second agitator 5 includes a stirring section 51 and a connecting section 52. The stirring section 51 is bent. The stirring section 51 is arranged close to the inner side and inner bottom of the reactor body 1. The bottom end is connected to the main shaft 2, and the top extends along the inner wall of the reactor body 1 to the middle of the reactor body 1. The connecting section 52 is connected and fixed to the top of the stirring section 51. Furthermore, the bottom of the stirring section 51 is bent upward near the main shaft 2 to avoid the area where the bracket 6 is located. An extension section 53 is also provided at the top of the stirring section 51. The extension section 53 extends upward from the connection point between the stirring section 51 and the connecting section 52, and the extension section 53 is arranged close to the inner wall of the reactor body 1. Specifically, the second agitator 5 is welded to a sleeve whose inner diameter is larger than the lower shaft 22, and the sleeve is fixedly connected to the lower shaft 22 with a clearance fit. The stirring section 51 of the second stirrer 5 which is close to the inner wall of the reactor can roll and stir the liquid toward the edge of the tank wall to achieve a centrifugal effect. When a large amount of mixed liquid, especially powder, is injected, the powder that is not mixed in time will not be concentrated at the bottom of the tank.

[0027] When the motor 3 is accelerated step by step, the first agitator 4 driven by the upper shaft 21 and the second agitator 5 driven by the lower shaft 22 rotate synchronously clockwise. The liquid inside the reactor evenly generates eddies that roll toward the tank wall and downward, thereby being fully stirred. When the motor 3 is decelerated, due to the action of the ratchet, a speed difference is generated between the first agitator 4 and the second agitator 5, and the speed of the lower part is higher than that of the upper part, thereby forming an uneven stirring form, and the eddy current form caused by the speed difference changes, which makes the liquid mixed more fully, and the "impact" feeling of the liquid is stronger, thereby improving the stirring effect. In addition, in the present embodiment, a clamping ring and a resin soft rubber ring are also provided between the bottom of the lower shaft 22 and the inner bottom surface of the reactor body 1, which can isolate the powder material deposited under the action of centrifugation or gravity on the side of the valve port of the root valve, thereby effectively reducing the occurrence of clogging of the root valve.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A reactor stirring device, comprising a reactor body, a main shaft arranged inside the reactor body, and a motor arranged on the top of the reactor body, wherein the motor drives the main shaft to rotate axially, and is characterized in that: The main shaft includes an upper shaft and a lower shaft, and the upper shaft and the lower shaft are connected by a ratchet coupling so that there is a rotation speed difference between the two. A first agitator is arranged on the outside of the upper shaft, and a second agitator is arranged on the outside of the lower shaft. The first agitator is located in the upper middle part of the tank body and is a horizontally arranged straight rod structure. The second agitator is located in the lower middle part of the tank body and is a special-shaped structure, and a plurality of second agitators are arranged around the main shaft.

2. A stirring device for a reaction kettle as claimed in claim 1, characterized in that: The second agitator includes a stirring section and a connecting section. The stirring section is bent and is arranged close to the inner side surface and inner bottom surface of the reactor body. The bottom end is connected to the main shaft, and the top end extends along the inner wall of the reactor body to the middle of the reactor body. The connecting section is connected and fixed to the top of the stirring section.

3. A stirring device for a reaction kettle as claimed in claim 2, characterized in that: The first agitator comprises two coaxially arranged straight rods, which are symmetrically arranged at the middle and upper part of the reactor body perpendicular to the main axis, and the length of the straight rods is less than the maximum distance between the agitating section and the main axis.

4. A stirring device for a reaction kettle as claimed in claim 1, characterized in that: The motor is arranged on the top of the reactor body, the output shaft of the motor is arranged downward and coaxial with the reactor body, and the output shaft of the motor is detachably connected to the upper shaft by a coupling.

5. A stirring device for a reaction kettle as claimed in claim 2, characterized in that: The bottom end of the lower shaft is rotatably connected to the reactor body, a bracket is sleeved outside the bottom end of the lower shaft, the top of the bracket is rotatably connected to the lower shaft through a bearing, and the bottom of the bracket is fixedly connected to the inner bottom surface of the reactor body.

6. A stirring device for a reaction kettle as claimed in claim 5, characterized in that: The bottom of the stirring section is bent upward near the main axis to avoid the area where the bracket is located.

7. A stirring device for a reaction kettle as claimed in claim 2, characterized in that: An extension section is also provided at the top of the stirring section. The extension section extends upward from a connection point between the stirring section and the connection section. The extension section is arranged close to the inner wall of the reactor body.

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