A continuous separation and purification apparatus for crude fatty acids

Abstract

The present application relates to fatty acid production equipment technical field, specifically to a kind of crude grade fatty acid's continuous separation and purification equipment, including tank body, agitator, the tank body outside is equipped with interlayer, the agitator rotation is installed on tank body, motor is equipped on the tank body, the motor is connected with agitator, the agitator includes spindle, stirring paddle, anchor bracket, scraper, the spindle rotation is installed on tank body, and spindle is connected with motor, the anchor bracket is installed on spindle, the spindle both sides are equipped with multiple stirring paddle.The present application is adjusted by being provided with adjusting part, when motor reverses, the inclination angle of stirring paddle can be adjusted, so as to adjust the inclination angle of stirring paddle according to crude grade fatty acid crystallization stage, and when crystallization equipment is normally working, motor is forward, and the inclination angle of stirring paddle is kept unchanged, so that crystallization equipment can respond in real time different crystallization stage to the dynamic optimization demand of stirring flow field, effectively improve product purity, yield and production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fatty acid production equipment, in particular to a continuous separation and purification equipment for crude grade fatty acid. BACKGROUND

[0002] The continuous separation and purification of crude grade fatty acid is a key process in chemical production, and the crystallization step is crucial for the purity and yield of the final product. As the core equipment of this step, the performance of the internal stirring device of the crystallizer directly determines the crystallization efficiency and quality. A good stirring system needs to ensure uniform temperature and concentration of the material in the tank, provide a stable environment for crystal growth, prevent crystal settling and caking, and avoid crystal breakage or secondary nucleation caused by excessive shear force.

[0003] Currently, industrial crystallizers widely use anchor, paddle or spiral ribbon stirrers. The stirring paddles of these stirrers are usually rigidly fixed to the stirring shaft by bolts. When the process requirements change (such as handling materials of different viscosities or expecting to obtain crystal products of different particle size distributions), the angle of the stirring paddles needs to be adjusted to optimize the flow field. However, the existing fixed structure makes it almost impossible to adjust the angle, and even if it is possible, it requires tedious individual adjustment of each stirring paddle, which has very low practicality. To address the above problems of disassembly and adjustment inconvenience, some improvement schemes are proposed in the prior art. For example, Chinese patent application CN202421983795.8 discloses a fatty acid crystallization device, which realizes rapid disassembly and synchronous angle adjustment of multiple stirring paddles through the setting of an adjustment assembly, while retaining the flexibility of individual adjustment, effectively improving the maintenance efficiency.

[0004] In actual production, in the face of different process stages, operators usually try to optimize the crystallization process by changing the stirring speed. However, simply changing the speed has fundamental limitations, as it can only change the "intensity" of stirring, but not the "flow pattern". Increasing the speed will inevitably intensify the fluid shear force and crystal collision energy, which can easily lead to crystal breakage and secondary nucleation. Reducing the speed may reduce the shear force, but it may also weaken the axial circulation ability below the critical point, leading to crystal settling and caking. However, the adjustment method of the Chinese patent needs to be performed manually in a stopped state, and cannot respond to the dynamic optimization requirements of the stirring flow field in different crystallization stages in real time without stopping and interrupting continuous production. Moreover, relying solely on changing the speed cannot achieve the essential optimization of the flow pattern, resulting in reduced purity, yield and production efficiency of the fatty acid crystallization product.

[0005] Therefore, in order to improve the purity, yield and production efficiency of the fatty acid crystallization product, a continuous separation and purification equipment for crude grade fatty acid is proposed. SUMMARY

[0006] The present application aims to provide a continuous separation and purification device for crude fatty acids, in order to improve the purity, yield and production efficiency of the fatty acid crystalline product, by adjusting the inclination angle of the stirring paddle when the motor is reversed, so that the inclination angle of the stirring paddle can be adjusted according to the crystallization stage of the crude fatty acid, and when the motor is running normally, the inclination angle of the stirring paddle remains unchanged, so that the crystallization device can respond in real time to the dynamic optimization requirements of the stirring flow field at different crystallization stages, effectively improving the purity, yield and production efficiency of the product.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A continuous separation and purification device for crude fatty acids, comprising a tank body, a stirrer, a partition layer provided on the outside of the tank body, the stirrer being rotatably installed on the tank body, a motor provided on the tank body, the motor being connected to the stirrer, the stirrer comprising a main shaft, a stirring paddle, an anchor frame and a scraper, the main shaft being rotatably installed on the tank body and connected to the motor, the anchor frame being installed on the main shaft, a plurality of stirring paddles being provided on both sides of the main shaft, the stirring paddles on both sides of the main shaft being centrally symmetrical, both ends of the stirring paddles being rotatably installed on the main shaft and the anchor frame, an adjusting member being provided on the tank body, the adjusting member being controlled to reciprocatingly rotate the stirring paddle by reversing the motor, and the scraper being provided on the anchor frame.

[0009] By providing the adjusting member, the inclination angle of the stirring paddle can be adjusted when the motor is reversed, so that the inclination angle of the stirring paddle can be adjusted according to the crystallization stage of the crude fatty acid, and when the motor is running normally, the inclination angle of the stirring paddle remains unchanged, so that the crystallization device can respond in real time to the dynamic optimization requirements of the stirring flow field at different crystallization stages, effectively improving the purity, yield and production efficiency of the product.

[0010] Preferably, the adjusting member comprises a connecting shaft and an adjusting shaft, the connecting shaft being rotatably installed on the tank body and connected to the motor, the connecting shaft being unidirectionally connected to the main shaft, the main shaft being unidirectionally connected to the tank body, the unidirectional connection direction of the main shaft being opposite to that of the connecting shaft, the adjusting shaft being slidably connected to the main shaft and sleeved in the main shaft, the adjusting shaft being connected to the connecting shaft through reciprocating threads, a plurality of adjusting grooves being formed in the adjusting shaft and decreasing in width in a vertically upward direction, and an adjusting plate being provided on the stirring paddle and located in the adjusting groove.

[0011] By connecting the main shaft and the connecting shaft in one-way rotation, connecting the main shaft and the tank in one-way rotation, and connecting the main shaft in one-way rotation in the opposite direction of the connecting shaft, when the motor rotates forward, the main shaft can rotate synchronously, at this time the adjusting shaft and the connecting shaft will not produce relative rotation displacement, while the motor reverses, the main shaft cannot rotate, and the connecting shaft cannot drive the main shaft to rotate, at this time the adjusting shaft and the connecting shaft produce relative rotation displacement, and then the connecting shaft drives the adjusting shaft to move up and down through the reciprocating thread, and the adjusting groove width changes in the vertical direction, when the adjusting plate is located in the part with small width, the rotation angle of the stirring paddle is small, and when the adjusting plate is located in the part with large width, the rotation angle of the stirring paddle is large, so that the crystallization equipment can change the inclination angle of the stirring paddle in real time to meet the dynamic optimization demand of the stirring flow field in different crystallization stages, thereby effectively improving the product purity, yield and production efficiency, and the adjusting mode is simple in structure, and the motor remains coaxial with the main shaft, thereby avoiding the connection shaft from being stuck due to uneven load.

[0012] Preferably, a boss is arranged inside the adjusting groove, and the adjusting plate and the boss are provided with inclined surfaces that match each other, the boss width increases in the vertical upward direction, the stirring paddle is slidingly installed on the main shaft and the anchor frame in the axial direction, a sliding seat is slidingly installed on the anchor frame, and the scraper is rotationally connected to the sliding seat by a torsional spring, and the scraper abuts against the stirring paddle.

[0013] By arranging the boss, when the adjusting shaft moves up and down, the stirring paddle can be extruded by the inclined surface to extend axially and push the scraper to extend, so that the stirring paddle does not make the scraper adhere to the inner wall of the tank when the stirring paddle is in the initial stage of crystallization of coarse fatty acid and the inner wall of the crystallizer is not adhered with fatty acid, thereby reducing the rotation resistance of the stirrer and the wear of the scraper, improving the service life of the scraper, and reducing the energy consumption of the crystallizer.

[0014] Preferably, a clamping groove is formed in the sliding seat, the clamping groove includes a guide portion and a limiting portion, the limiting portion is M-shaped, the bottom surfaces of the guide portion and the limiting portion gradually increase, the highest part of the limiting portion and the lowest part of the guide portion are communicated, and the highest part of the limiting portion and the lowest part of the guide portion are on the same straight line, the lowest part of the limiting portion and the highest part of the guide portion are communicated, a limiting rod is elastically connected to the anchor frame, and the elastic force direction of the limiting rod is toward the bottom surface of the guide portion and the highest part of the limiting portion.

[0015] The elastic connecting rod is elastically connected to the anchor frame, and the elastic force direction of the elastic connecting rod is towards the bottom surface of the guide part and the highest part of the limiting part, when the scraper is pushed out by the stirring paddle, because the highest part of the limiting part is greater than the lowest part of the guide part, the elastic connecting rod can only move along the guide part and move to the lowest part of the limiting part, when the stirring paddle retracts once, the scraper is reset by the elastic force of the torsion spring and the liquid pressure, and at this time the elastic connecting rod swings to the highest part of the limiting part under the action of the spring elastic force, so that the elastic connecting rod enters the middle part of the limiting groove, and because the limiting part is M-shaped, the elastic connecting rod cannot swing at this time, thereby limiting the reset of the scraper, and when the stirring paddle pushes the rod scraper out again, the elastic connecting rod is separated from the middle part of the limiting part, so that it swings to the highest part of the limiting part under the action of the elastic force, and when the scraper retracts again, the elastic connecting rod can retreat to the lowest part of the guide part, at this time the elastic connecting rod cannot limit the reset of the scraper, through the above mode, the crystallizer can control the stretching and contraction of the scraper at different stages according to different products, thereby effectively improving the practicability of the equipment.

[0016] Preferably, an extrusion spring is connected between the lower end of the adjusting shaft and the main shaft, and the elastic force direction of the extrusion spring is opposite to the gravity direction of the adjusting shaft.

[0017] An extrusion spring is connected between the lower end of the adjusting shaft and the main shaft, and the gravity direction of the extrusion spring is opposite to the gravity direction of the adjusting shaft, so that the extrusion spring pushes the adjusting shaft to move upward, and the adjusting shaft extrudes the connecting shaft upward, thereby avoiding that the stirring paddle is extruded by the liquid thrust to move upward and collide with the reciprocating thread, thereby affecting the service life of the equipment, and also avoiding that the fluctuation of water flow reduces the extrusion force of the stirring paddle on the adjusting shaft, causing the adjusting shaft to move up and down and collide, thereby improving the service life of the equipment.

[0018] Preferably, the stirring paddle is divided into a long part and a short part, the length of the long part is greater than the length of the short part, and the long part is located above the stirring paddle.

[0019] The long part and the short part are provided, and the long part is located above the stirring paddle, so that the center of gravity of the stirring paddle is located in the direction of the long part, and when the stirrer is not rotating, the stirring paddle can rotate under the action of gravity in the direction of the force received by the stirring paddle, so that when the stirrer rotates, the stirring paddle will not rotate, thereby avoiding that the stirring paddle rotates and collides with the adjusting shaft during the starting process of the stirrer, causing the stirring paddle to be easily damaged by stress fatigue due to impact load.

[0020] Preferably, two stirring paddles symmetrically arranged along the center of the main shaft are installed in the same adjusting groove, and a connecting hole and a connecting pin are respectively arranged on the two stirring paddles symmetrically arranged along the center of the main shaft, and the connecting pin is sleeved in the connecting hole.

[0021] Two stirring paddles which are symmetrical to the center of the main shaft are connected with the connecting pin through the connecting hole, so that the problem that the stirring paddles are pressed against the side wall of the main shaft at one end of the main shaft, the two ends of the stirring paddles are subjected to bending moments, and the stirring paddles are prone to stress fatigue and damage is avoided, and the service life of the equipment is effectively improved.

[0022] Preferably, a sealing sleeve is connected between the stirring paddle and the main shaft, and the middle part of the sealing sleeve has a larger diameter than the two ends.

[0023] The sealing sleeve is connected between the stirring paddle and the main shaft, so that liquid cannot enter the inside of the main shaft and contaminate the product and affect the product quality, and the middle part of the sealing sleeve has a larger diameter than the two ends, so that the deformation amount of the sealing sleeve is reserved, the deformation amount of the sealing sleeve during the expansion and rotation of the stirring paddle is reduced, and the service life of the sealing sleeve is effectively improved.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1. By arranging the adjusting member, the inclination angle of the stirring paddle can be adjusted when the motor is reversed, so that the inclination angle of the stirring paddle can be adjusted according to the rough fatty acid crystallization stage, and when the crystallization equipment is working normally, the motor is reversed to keep the inclination angle of the stirring paddle unchanged, so that the crystallization equipment can respond to the dynamic optimization requirements of the stirring flow field in different crystallization stages in real time, and the product purity, yield and production efficiency are effectively improved.

[0026] 2. The adjusting member can control the inclination angle adjustment of the stirring paddle by reversing the motor, and the structure is simple and the cost is low, and the adjusting member can ensure that the motor shaft and the main shaft are coaxial, so that the connecting shaft is not blocked by uneven load.

[0027] 3. When the adjusting member adjusts the inclination angle of the stirring paddle, it can also control the expansion and contraction of the scraper, so that when the stirring paddle is in the initial stage of rough fatty acid crystallization and the inner wall of the crystallizer is not adhered with fatty acid, the scraper will not be attached to the inner wall of the tank, thereby reducing the rotating resistance of the stirrer and the wear of the scraper, which can improve the service life of the scraper and reduce the use of the crystallizer. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0029] Figure 2 It is a partial structure sectional view of the present application;

[0030] Figure 3 It is Figure 2 the local enlarged view of A in the middle;

[0031] Figure 4 It is Figure 2 the local enlarged view of B in the middle;

[0032] Figure 5 Structure diagram of adjusting shaft of the application;

[0033] Figure 6 Structure diagram of sliding seat and scraper cooperation;

[0034] Figure 7 Structure diagram of Figure 6 Local enlarged view at C;

[0035] Figure 8 Structure diagram of two stirring paddles of the application in central symmetry cooperation.

[0036] In the figure: 1, tank body; 2, stirrer; 21, main shaft; 22, stirring paddle; 221, long part; 222, short part; 23, anchor bracket; 24, scraper; 3, partition layer; 4, motor; 5, adjusting part; 51, connecting shaft; 52, adjusting shaft; 53, adjusting groove; 54, adjusting plate; 6, boss; 7, inclined surface; 8, sliding seat; 9, clamping groove; 91, guide part; 92, limiting part; 10, limiting rod; 11, return spring; 12, extrusion spring; 13, connecting hole; 14, connecting pin; 15, sealing sleeve; 16, mounting hole. DETAILED DESCRIPTION

[0037] The application provides a continuous separation and purification equipment for crude fatty acid, and the technical scheme is as follows: Figures 1 to 8 The application provides a continuous separation and purification equipment for crude fatty acid, and the technical scheme is as follows:

[0038] Figures 1 to 3 、 Figure 5 、 Figure 6 、 Figure 7 ​The utility model relates to a crystallization equipment, including jar body 1, be equipped with agitator 2 on jar body 1, and agitator 2 includes spindle 21, stirring paddle 22, anchor bracket 23, scraper 24, is equipped with interlayer 3 on jar body 1, spindle 21 unidirectional rotation is installed on jar body 1, and anchor bracket 23 is bolted on spindle 21, and scraper 24 is equipped with on anchor bracket 23, and a plurality of stirring paddles 22 are equipped with on the both sides of spindle 21, and the stirring paddle 22 centrosymmetry of both sides of spindle 21, and the both ends of stirring paddle 22 are rotatably installed on spindle 21 and anchor bracket 23, and stirring paddle 22 is inclined to the axial direction and radial direction of spindle 21, and jar body 1 is equipped with adjusting part 5, and adjusting part 5 includes connecting shaft 51, adjusting shaft 52, connecting shaft 51 is unidirectional rotation with spindle 21, and the unidirectional rotation direction of spindle 21 is opposite with the unidirectional rotation direction of connecting shaft 51, and connecting shaft 51 positive rotation (S direction in the figure indicates) drives spindle 21 to rotate, and adjusting shaft 52 is slidably installed in the inside of spindle 21, and adjusting shaft 52 is connected through reciprocating thread and connecting shaft 51, and a plurality of adjusting grooves 53 are set up on adjusting shaft 52, and adjusting plate 54 is equipped with on stirring paddle 22, and adjusting plate 54 is located in adjusting groove 53, and the width of adjusting groove 53 decreases along the vertical upward direction, and jar body 1 is installed with motor 4, and motor 4 is connected with connecting shaft 51, when motor 4 positive rotation, drive spindle 21 positive rotation, at this time, agitator 2 rotates and stirs the material crystallization, and when motor 4 reverses, at this time, spindle 21 cannot rotate, and connecting shaft 51 will not interfere with spindle 21, make spindle 21 and connecting shaft 51 generate relative rotation displacement, through reciprocating thread, drive adjusting shaft 52 to move up and down, when adjusting shaft 52 moves down, the width of adjusting groove 53 decreases, at this time, the rotation amplitude of adjusting plate 54 in adjusting groove 53 decreases, at this time, when motor 4 positive rotation, stirring paddle 22 rotates and sticks on the side wall of adjusting groove 53 by water flow resistance, and because adjusting groove 53 restricts the swing amplitude of stirring paddle 22, thereby makes the inclination angle of stirring paddle 22 increase, conversely, when adjusting shaft 52 moves down, the inclination angle of stirring paddle 22 decreases, in this way, through setting adjusting part 5, can adjust the inclination angle of stirring paddle 22 when motor 4 reverses, thereby can adjust the inclination angle of stirring paddle 22 according to the crystallization stage of coarse grade fatty acid, and when the crystallization equipment works normally, motor 4 positive rotation keeps the inclination angle of stirring paddle 22 unchanged, makes the crystallization equipment can respond the dynamic optimization demand of stirring flow field in different crystallization stages in real time, effectively promotes product purity, yield and production efficiency, and adjusting part 5 structure is simple, and motor 4 keeps coaxial with spindle 21, in this way avoids that connecting shaft 51 is stuck by uneven load, sets up displacement sensor in the inside of spindle 21, can observe the moving distance of adjusting shaft 52 through displacement sensor, thereby quickly confirms the inclination angle of stirring paddle 22.The adjusting groove 53 is internally provided with a boss 6, the adjusting plate 54 and the boss 6 are provided with mutually matched inclined surfaces 7, the boss 6 is increased in width along the vertical upward direction, the stirring paddle 22 is slidingly installed on the main shaft 21 and the anchor bracket 23 along the axial direction, the anchor bracket 23 is slidingly installed with a sliding seat 8, the scraper 24 is in abutment with the stirring paddle 22, when the adjusting shaft 52 moves downward, the boss 6 extrudes the stirring paddle 22 through the inclined surface 7, thereby pushing out the stirring paddle 22, and further extruding the scraper 24, thereby pushing the sliding seat 8 to extend out, so that the sliding plate is attached to the inner wall of the tank body 1, and the crystal adhered to the inner wall of the tank body 1 is scraped off, preventing the crystal from adhering to affect the heat exchange of the crystallizer, the scraper 24 is rotatably connected to the sliding seat 8 through a torsion spring, when the stirring paddle 22 extends out by different lengths, the scraper 24 can be attached to the inner wall of the tank body 1, by controlling the extension and retraction of the scraper 24, the stirring paddle 22 will not make the scraper 24 attached to the inner wall of the tank body 1 when the crystallizer inner wall is not adhered with fatty acid in the initial stage of coarse fatty acid crystallization, thereby reducing the rotating resistance of the stirrer 2 and reducing the wear of the scraper 24, which can not only improve the service life of the scraper 24, but also reduce the energy consumption of the crystallizer.

[0039] See Figures 1 to 7The sliding seat 8 is provided with a clamping groove 9, the clamping groove 9 comprises a guide part 91 and a limiting part 92, the limiting part 92 is in M shape, the height of the bottom surface of the guide part 91 and the limiting part 92 gradually increases, the highest part of the limiting part 92 communicates with the lowest part of the guide part 91, and the highest part of the limiting part 92 and the lowest part of the guide part 91 are on the same straight line, the lowest part of the limiting part 92 communicates with the highest part of the guide part 91, the anchor bracket 23 is provided with a mounting hole 16, the mounting hole 16 is internally provided with a limiting rod 10, the limiting rod 10 is rotatably installed on the anchor bracket 23, and a return spring 11 is adhered between the limiting rod 10 and the anchor bracket 23; since the return spring 11 is adhered between the limiting rod 10 and the anchor bracket 23, the elastic force of the return spring 11 pushes the limiting rod 10 to be attached to the bottom surface of the guide part 91, when the sliding seat 8 is extended, since the highest part of the limiting part 92 communicates with the lowest part of the guide part 91, the limiting rod 10 is blocked from entering the limiting groove, so that the limiting rod 10 moves along the guide part 91 to the lowest part of the limiting part 92, when the adjusting shaft 52 moves upward, since the radial direction of the stirring paddle 22 is inclined, the stirring paddle 22 is pushed to shrink under the water flow resistance, at this time, the scraper 24 also shrinks under the water flow resistance, and since the elastic force of the return spring 11 on the limiting rod 10 is directed to the highest part of the limiting part 92, the limiting rod 10 swings to the highest part of the limiting part 92, and since the limiting part 92 is in M shape, when the limiting rod 10 moves to the middle part of the limiting groove, the limiting rod 10 is limited from swinging by the limiting groove, and the sliding seat 8 is limited from being retracted by the limiting rod 10, at this time, the scraper 24 can be attached to the inner wall of the tank body 1, and when the sliding seat 8 is extended again, the limiting rod 10 is separated from the middle part of the limiting part 92 and swings to the highest part of the limiting part 92, at this time, when the sliding seat 8 is retracted again, the limiting rod 10 can enter the lowest part of the guide part 91 along the highest part of the limiting part 92, at this time, the limiting rod 10 cannot limit the movement of the sliding seat 8, so that the scraper 24 completely shrinks, and the scraper 24 can completely shrink without being attached to the inner wall of the tank body 1, in this way, the crystallizer can control the extension and shrinkage of the scraper 24 in different stages according to different products, so that the practicability of the equipment is effectively improved.

[0040] Please refer to Figures 1 to 8, the lower end of the adjusting shaft 52 is connected with the main shaft 21, and the extrusion spring 12 is connected between the lower end of the adjusting shaft 52 and the main shaft 21, and the elastic force direction of the extrusion spring 12 is opposite to the gravity direction of the adjusting shaft 52; the lower end of the adjusting shaft 52 is connected with the main shaft 21, and the extrusion spring 12 is connected between the lower end of the adjusting shaft 52 and the main shaft 21, and the extrusion spring 12 is opposite to the gravity direction of the adjusting shaft 52, so that the extrusion spring 12 pushes the adjusting shaft 52 to move upward, and the adjusting shaft 52 extrudes the connecting shaft 51 upward, thereby avoiding that the stirring paddle 22 is extruded by the liquid thrust to move upward and collide with the reciprocating thread, thereby affecting the service life of the equipment, and also avoiding that the water flow fluctuation causes the extrusion force of the stirring paddle 22 on the adjusting shaft 52 to decrease, causing the adjusting shaft 52 to move up and down and produce vibration and impact, thereby improving the service life of the equipment; the stirring paddle 22 is divided into a long part 221 and a short part 222, the length of the long part 221 is greater than the length of the short part 222, and the long part 221 is located above the stirring paddle 22; the long part 221 and the short part 222 are arranged, and the long part 221 is located above the stirring paddle 22, so that the center of gravity of the stirring paddle 22 is located in the direction of the long part 221, and when the stirrer 2 is not rotating, the stirring paddle 22 can rotate in the direction of the force under the action of gravity, so that when the stirrer 2 rotates, the stirring paddle 22 will not rotate, thereby avoiding that the stirring paddle 22 rotates and collides with the adjusting shaft 52 during the starting process of the stirrer 2, causing the stirring paddle 22 to be impacted by the load and also produce stress fatigue damage; the two stirring paddles 22 symmetrically arranged along the center of the main shaft 21 are installed in the same adjusting groove 53, and the two stirring paddles 22 are respectively provided with a connecting hole 13 and a connecting pin 14, and the connecting pin 14 is sleeved in the connecting hole 13; the connecting hole 13 and the connecting pin 14 are connected with each other, avoiding that the stirring paddle 22 is extruded on one end of the main shaft 21, causing the stirring paddle 22 to be subjected to bending moment at both ends, thereby causing the stirring paddle 22 to be easily damaged by stress fatigue, thereby effectively improving the service life of the equipment; the sealing sleeve 15 is connected between the stirring paddle 22 and the main shaft 21, the diameter of the middle part of the sealing sleeve 15 is greater than the diameter of both ends; the sealing sleeve 15 is connected between the stirring paddle 22 and the main shaft 21, which can avoid that the liquid enters the inside of the main shaft 21 and cannot be cleaned, thereby causing the product to be contaminated and affecting the product quality, and the diameter of the middle part of the sealing sleeve 15 is greater than the diameter of both ends, reserving the deformation amount of the sealing sleeve 15, reducing the deformation amount of the sealing sleeve 15 during the expansion and rotation of the stirring paddle 22, and effectively improving the service life of the sealing sleeve 15.

[0041] Working principle: before operation, inject cold water in the interlayer 3, inject material to the inside of the tank 1, in the initial stage of crystallization, the angle of inclination needs to be reduced, through the motor 4 reverse control connecting shaft 51 reverse, make connecting shaft 51 and main shaft 21 relative rotation displacement, make connecting shaft 51 and adjusting shaft 52 relative rotation displacement, further make adjusting shaft 52 move down, at this time adjusting plate 54 swing in adjusting groove 53 inside amplitude increases, at this time stirring paddle 22 rotates under the action of gravity, thereby completing the angle adjustment of stirring paddle 22, at this time the axial circulation of agitator 2 is enhanced to eliminate gradient, ensure uniform heat transfer of liquid, when the motor 4 rotates, stirring paddle 22 is always attached to the inner wall of adjusting groove 53 under the action of water flow resistance, in the middle stage of crystallization, connecting shaft 51 reverses, control adjusting shaft 52 moves up, at this time adjusting plate 54 swing in adjusting groove 53 inside amplitude decreases, thereby increasing the angle of inclination of stirring paddle 22, reducing the axial circulation intensity of agitator 2, thereby reducing shear force to protect the crystal, while ensuring the radial circulation to be enhanced under the condition of constant speed, so that the liquid in the middle of tank 1 can flow to the tank wall, ensuring uniform heat transfer of liquid, while adjusting shaft 52 moves down, boss 6 extrudes stirring paddle 22, so that stirring paddle 22 pushes scraper 24 to extend, so that scraper 24 is attached to the tank wall to remove the adhered crystals, ensuring heat exchange of the crystallizer, in the late stage of crystallization, the motor 4 reverses, at this time the adjusting shaft 52 moves up, at this time the angle of inclination of stirring paddle 22 is reduced again, thereby ensuring the axial circulation of agitator 2 to be enhanced to prevent settling and caking, at this time boss 6 no longer extrudes stirring paddle 22, at this time stirring paddle 22 is reset under the action of water flow resistance, while scraper 24 is also reset under the action of water flow resistance, but since the limiting rod 10 enters the middle of the limiting part 92, thereby limiting the reset of the scraper 24, so that the scraper 24 still continues to clean the tank wall, after the crystallization of the coarse grade fatty acid is completed, the internal crystals and liquid are discharged, and then the motor 4 is controlled to reverse to move back and forth for one stroke, in the process of moving back and forth, the stirring paddle 22 is pushed out again and continues to extrude the scraper 24, thereby pushing the sliding seat 8 to move, at this time the limiting rod 10 swings to the highest position of the limiting part 92 under the action of the elastic force of the reset spring 11, when the stirring paddle 22 is retracted in the process of moving back and forth, the scraper 24 will also retract, and the limiting rod 10 can enter the guide part 91 along the limiting part 92 without limiting the reset of the scraper 24, at this time the stirring paddle 22 is in a small inclination state, and the scraper 24 is in a retracted state, at this time the next batch of product crystallization operation is surprising.

[0042] The above describes one specific embodiment of the present application in detail in combination with the drawings, but the present application is not limited to the above described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of these embodiments without departing from the principles and ideas of the present application should still fall within the protection scope of the present application.

Claims

1. A continuous separation and purification device for crude fatty acids, characterized in that, The device includes a tank (1) and a stirrer (2). A partition (3) is provided on the outside of the tank (1). The stirrer (2) is rotatably mounted on the tank (1). A motor (4) is provided on the tank (1), and the motor (4) is connected to the stirrer (2). The stirrer (2) includes a main shaft (21), a stirring paddle (22), an anchor frame (23), and a scraper (24). The main shaft (21) is rotatably mounted on the tank (1) and is connected to the motor (4). An anchor frame (23) is installed on the main shaft (21). Multiple stirring paddles (22) are provided on both sides of the main shaft (21). The stirring paddles (22) on both sides of the main shaft (21) are symmetrical. The two ends of the stirring paddles (22) are rotatably installed on the main shaft (21) and the anchor frame (23) respectively. An adjusting component (5) is provided on the tank body (1). The adjusting component (5) controls the stirring paddles (22) to rotate back and forth by the reverse rotation of the motor (4). The scraper (24) is set on the anchor frame (23). The adjusting component (5) includes a connecting shaft (51) and an adjusting shaft (52). The connecting shaft (51) is rotatably mounted on the tank (1). The connecting shaft (51) is connected to the motor (4). The connecting shaft (51) is unidirectionally rotatably connected to the main shaft (21). The main shaft (21) is unidirectionally rotatably connected to the tank (1), and the unidirectional rotatable connection direction of the main shaft (21) is opposite to that of the connecting shaft (51). The adjusting shaft (52) is slidably connected on the main shaft (21). The adjusting shaft (52) is sleeved inside the main shaft (21). The adjusting shaft (52) is connected to the connecting shaft (51) by a reciprocating thread. The adjusting shaft (52) has multiple adjusting grooves (53). The width of the adjusting grooves (53) decreases in the vertical upward direction. The stirring paddle (22) has an adjusting plate (54). The adjusting plate (54) is located inside the adjusting grooves (53). The adjusting groove (53) is provided with a boss (6) inside. The adjusting plate (54) and the boss (6) are provided with mutually cooperating inclined surfaces (7). The width of the boss (6) increases in the vertical upward direction. The stirring paddle (22) is slidably installed on the main shaft (21) and the anchor frame (23) in the axial direction. The anchor frame (23) is slidably installed with a sliding seat (8). The scraper (24) is rotatably connected to the sliding seat (8) through a torsion spring. The scraper (24) abuts against the stirring paddle (22). A compression spring (12) is connected between the lower end of the adjusting shaft (52) and the main shaft (21). The direction of the spring force of the compression spring (12) is opposite to the direction of gravity of the adjusting shaft (52).

2. The continuous separation and purification equipment for crude fatty acids according to claim 1, characterized in that, The sliding seat (8) is provided with a slot (9), which includes a guide part (91) and a limiting part (92). The limiting part (92) is M-shaped. The bottom heights of the guide part (91) and the limiting part (92) gradually increase. The highest point of the limiting part (92) is connected to the lowest point of the guide part (91), and the highest point of the limiting part (92) and the lowest point of the guide part (91) are on the same straight line. The lowest point of the limiting part (92) is connected to the highest point of the guide part (91). The anchor frame (23) is elastically connected with a limiting rod (10). The elastic force on the limiting rod (10) is directed towards the bottom surface of the guide part (91) and the highest point of the limiting part (92).

3. The continuous separation and purification equipment for crude fatty acids according to claim 1, characterized in that, The stirring paddle (22) is divided into a long part (221) and a short part (222). The length of the long part (221) is greater than the length of the short part (222). The long part (221) is located above the stirring paddle (22).

4. The continuous separation and purification equipment for crude fatty acids according to claim 1, characterized in that, Two agitators (22) symmetrical about the center of the main shaft (21) are installed in the same adjustment groove (53). The two agitators (22) symmetrical about the center of the main shaft (21) are respectively provided with connecting holes (13) and connecting pins (14), and the connecting pins (14) are sleeved inside the connecting holes (13).

5. The continuous separation and purification equipment for crude fatty acids according to claim 1, characterized in that, A sealing sleeve (15) is connected between the stirring paddle (22) and the main shaft (21), and the diameter of the middle part of the sealing sleeve (15) is larger than the diameter of both ends.

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