Adjustable crystallizer for fatty acid production

Abstract

The application discloses a kind of adjustable crystallizer for fatty acid preparation, it is related to fatty acid preparation technical field, including crystallization kettle and kettle cover, be equipped with stirring shaft on kettle cover, the outside wall of crystallization kettle is equipped with jacket layer, guiding rod is fixed in crystallization kettle, sliding ball and attachment cylinder are on guiding rod, the outer surface of ball is equipped with attachment plate, gas pipe is equipped in crystallization kettle, gas pipe is imported heat exchange gas medium, the port of each gas pipe is located below corresponding attachment plate, this adjustable crystallizer for fatty acid preparation, by setting bubble heat exchange mode, so that it is not necessary to set too much modeling pipeline in mixed solution, so that the problem of crystal attachment is not generated, it is convenient to recycle, bubble is directly present in mixed solution, so there is no other isolation material, can be more efficient heat exchange, and can reduce heat exchange loss generated by pipeline in heat exchange process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fatty acid preparation, in particular to an adjustable crystallizer for fatty acid preparation. BACKGROUND

[0002] The basic principle of fatty acid production is to hydrolyze oil and fat under specific conditions, and the hydrolysis product is a complex mixture containing oil and fat, glycerol, fatty acid and other mixtures, etc. The common method in fatty acid production is condensation crystallization, which utilizes the relationship between the solubility of unsaturated fatty acid and temperature. Generally, the solubility in solution decreases with the decrease of temperature, and the fatty acid is supersaturated and crystallizes.

[0003] The most common reaction container is a cooling kettle, which is composed of a kettle body and a jacket surrounding the kettle body. The top of the kettle body is a kettle cover, which is generally provided with a stirring shaft and a motor. The kettle body carries the mixture solution, and low-temperature medium is introduced into the jacket to exchange heat with the kettle body, so that the crystals are precipitated. Because the jacket is around the kettle body, the main heat exchange area is the side wall of the kettle body, and the middle area of the kettle body is higher than the surrounding area, which leads to the precipitation of crystals mainly on the inner side wall of the kettle body. The low heat exchange efficiency also leads to low crystallization efficiency. In the prior art, a pipe is arranged in the kettle body, and a heat exchange medium is introduced into the pipe. However, the crystals are easy to adhere to the kettle body and the pipe wall when they are precipitated. The inner side wall of the kettle body is relatively wide and simple in structure, and easy to clean. However, the pipe is generally spirally arranged in the entire cavity, which is not conducive to cleaning the crystals on the pipe after production, and is inconvenient for subsequent use. Therefore, we propose an adjustable crystallizer for fatty acid preparation. SUMMARY

[0004] In order to solve the above technical problems existing in the prior art, the present application provides an adjustable crystallizer for fatty acid preparation.

[0005] In order to achieve the above object, the present application provides the following technical scheme: A kind of adjustable crystallizer for fatty acid preparation, including crystallization kettle and kettle cover, the stirring shaft is equipped on the kettle cover, the outside wall of the crystallization kettle is equipped with jacket layer, the inner bottom wall surface of the crystallization kettle is fixed with several vertical guide rods, guide rod is evenly distributed in the crystallization kettle, the ball and the attachment cylinder are slid on the guide rod, the attachment cylinder is integrated with the ball and is located below the ball, the outer surface of the ball is equipped with attachment plate, the annular surface of the contact place of attachment plate and ball contains the ball center, attachment plate is downward umbrella surface, the lower surface of attachment plate and ball and attachment cylinder form the attachment body of bubble, the overall average density of attachment plate and attachment cylinder and ball is higher than the average density of mixed solution in the crystallization kettle, the gas pipe is arranged in the crystallization kettle, and the gas pipe is connected with the attachment plate outside the kettle, the gas pipe is connected with heat exchange gas medium, and the port of each gas pipe is located below the corresponding attachment plate.

[0006] Preferably, the inner bottom wall of the crystallization kettle is also fixed with a bearing seat corresponding to the guide rod, the bearing seat is used to bear the attachment plate, the bearing seat is annular and coaxially arranged with the corresponding guide rod, the bearing seat is provided with an electric coil vertically arranged in the axial direction, the attachment cylinder and / or the attachment plate is provided with an adsorbent capable of being magnetically adsorbed, the side wall of the bearing seat is provided with a liquid discharge hole, the vertical position of the liquid discharge hole is lower than the port of the corresponding gas pipe, the guide rod is embedded with a sensor for detecting the position of the attachment cylinder, and the sensor sends a signal to energize the electric coil when the attachment plate is seated on the bearing seat.

[0007] Preferably, the upper end of the guide rod is fixed with a pressure rod abutting against the attachment plate, so that the attachment plate is inclined when the attachment plate rises to the liquid level position of the mixed solution.

[0008] Preferably, the attachment plate, the attachment cylinder, the ball, the guide rod and the bearing seat are all made of heat insulation material.

[0009] Preferably, the upper surface of the attachment plate is provided with a plurality of convex ribs evenly distributed along the circumference, the convex ribs are variable-diameter spiral, and the spiral diameter increases from the axial direction of the attachment plate to the periphery.

[0010] Preferably, the surface of the guide rod is provided with a spiral guide strip, and the inner surface of the ball is provided with a spiral groove matched with the spiral guide strip.

[0011] Preferably, the convex ribs and the spiral guide strip have the same direction of rotation.

[0012] Preferably, the inner surface of the ball is provided with an expansion groove at both ends of the spiral groove.

[0013] Preferably, when the attachment plate is in the maximum inclination state of contacting the pressure rod, the contact point of the pressure rod and the attachment plate and the plane of the attachment plate axis are upwardly inclined.

[0014] Compared with the prior art, the adjustable crystallizer for fatty acid preparation has the following beneficial effects:

[0015] (1) The present application sets the bubble heat exchange mode, so that it is not necessary to set too many shaped pipelines in the mixed solution, thereby avoiding the problem of crystal adhesion and facilitating recycling.

[0016] (2) The present application sets the adhesion plate and the like, can delay the floating rate of the bubbles, thereby prolonging the heat exchange process of the heat exchange medium in the bubbles, and because the bubbles exist directly in the mixed solution, there is no other isolation material, the heat exchange can be more efficient, and the heat exchange loss caused by the pipeline in the heat exchange process can be reduced.

[0017] (3) The up-and-down movement of the adhesion plate in the present application can clean the guide rod, thereby effectively avoiding the adhesion of the crystals.

[0018] (4) The present application can adapt to mixed solutions with different densities by adjusting the size of the bubbles, thereby improving the applicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application, in which:

[0020] Figure 1 is a sectional view of the internal structure of the crystallization kettle;

[0021] Figure 2 is a top view structural schematic diagram of Figure 1 ;

[0022] Figure 3 is a half-sectional structure of the crystallization kettle and the jacket layer and a structural schematic diagram at the guide rod;

[0023] Figure 4 is an enlarged schematic diagram of the A zone structure in Figure 3 ;

[0024] Figure 5 is a state change diagram of the adhesion plate in the bubble floating process;

[0025] Figure 6 is a bubble overflow state process diagram when the adhesion plate is inclined;

[0026] Figure 7 is a structural schematic diagram of the spiral guide strip and the protruding rib;

[0027] Figure 8 is a top view of the adhesion plate in Figure 7 ;

[0028] Figure 9 This is a schematic diagram of the planar unfolded structure of the inner surface of a sphere.

[0029] In the diagram: 1-Crystallization vessel; 2-Vessel cover; 3-Stirring shaft; 4-Jacket layer; 5-Guide rod; 6-Sphere; 7-Attachment cylinder; 8-Attachment plate; 9-Bearing seat; 10-Electrified coil; 11-Drainage hole; 12-Gas pipe; 13-Sensor; 14-Pressure rod; 15-Protruding rib; 16-Spiral guide bar; 17-Spiral groove; 18-Expansion groove. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a technical solution: an adjustable crystallizer for fatty acid preparation, comprising an annular crystallization vessel 1, a vessel cover connected to the top of the crystallization vessel 1, the two being openable and closable, a stirring shaft 3 disposed at the center of the vessel cover 2 with the axis of the stirring shaft 3 coinciding with the axis of the vessel cover 2, the vessel cover 2 also having a feed inlet and a motor, the motor shaft being driven to rotate the stirring shaft 3 for stirring, a jacket layer 4 being annularly surrounding the outer wall of the crystallization vessel 1, the jacket layer 4 having an air inlet and an air outlet, a low-temperature heat exchange medium, which can be gas or liquid, being introduced into the jacket layer;

[0032] The guide rod 5 is fixed to the inner bottom wall of the crystallizing vessel 1 with its axis vertically upward. The outer surface of the sphere 6 is spherical, and a through hole adapted to the guide rod 5 is opened through the axis for sliding. The two are fitted with a gap for easy sliding, but the gap should not be too large to avoid shaking. The attachment cylinder 7 is an annular cylindrical body with open ends. One end is fixed below the sphere. The attachment cylinder 7 is coaxial with the guide rod 5, and a large gap is set between the two to avoid contact between the two and thus cause large static friction. The attachment plate 8 is a downward-opening trumpet shape, that is, an open umbrella shape. The contact surface between the attachment plate 8 and the sphere 6 is a concave spherical surface adapted to slide with the sphere 6. The center of the sphere 6 is in the area formed by the concave spherical surface of the contact with the attachment plate 8, so that the sphere 6 will not detach from the attachment plate 8, but can slide on a curved surface. The overall average density of the sphere 6, the attachment cylinder 7 and the attachment plate 8 is greater than the density of the mixture, so that the whole can sink.

[0033] A one-way valve is installed at the end of the gas pipe 12, and a heat exchange gas medium is introduced into the mixture through the gas pipe 12. This heat exchange gas medium is preferably an inert gas, which does not react with the mixture and is insoluble; nitrogen is preferred. The number of gas pipes 12 corresponds to the guide rods 5, and the inlet of the gas pipe 12 is located directly below the coverage area of ​​the attachment plate 8. After entering through the gas pipe 12, the heat exchange gas medium forms bubbles in the mixture, and heat exchange is achieved through these bubbles. The gas pipes 12 are evenly arranged along the guide rods 5 on the bottom wall of the crystallizing vessel 1, thus covering the entire crystallizing vessel 1. The bubbles can float upwards, filling the entire internal cavity of the crystallizing vessel 1. The bubbles rise immediately after formation and contact the lower surface of the attachment plate 8. Because the attachment plate 8 is inverted funnel-shaped, the bubbles will concentrate towards the axis of the attachment plate 8, facilitating the stable upward floating of the attachment plate 8. The attachment cylinder 7 is designed to separate the edges of the bubbles from the guide rods 5 to prevent the bubbles from being pulled apart and stopped during their upward movement. The overall average density of the sphere 6, attachment cylinder 7, and attachment plate 8 is greater than the density of the mixture, but not too great, to prevent the buoyancy generated by the bubbles from being insufficient to push the whole upward. The function of the sphere 6, attachment cylinder 7, and attachment plate 8 is to slow down the rising rate of the bubbles, allowing them sufficient time to exchange heat with the mixture. The rising allows the crystallizer to be filled vertically, and the bubble heat exchange does not have various curved pipes, so no crystals will adhere to the pipes. The guide rod 5 is pushed down by the up and down sliding of the sphere 6 before the crystals form large attached crystal blocks, so no adhesion will form. When the bubbles push the attachment plate 8 to the surface of the mixture, because the mixture is not calm during the stirring process, the lower side wall edge of the attachment plate 8 will not form a completely closed state with the liquid surface. Local air leakage causes the attachment plate 8 to tilt due to unbalanced force, so all the bubbles overflow. The gas outlet is set on the lid 2 for reflux.

[0034] After all the bubbles have overflowed, the attachment plate 8, the sphere 6, and the attachment cylinder 7 sink as a whole. Because the attachment plate 8 is tilted, its vertical cross-sectional area is reduced, which reduces the resistance to sinking and causes it to descend rapidly, allowing the bubbles to rise again. The size of the bubbles can be controlled by the ventilation time.

[0035] See Figure 4 , Figure 5 and Figure 6 The support seat 9 is a hollow ring-shaped body with open ends and is coaxially arranged with the guide rod 5. It is used to form a relatively closed cavity with the attachment plate 8. An energized coil 10 is set in the support seat 9. The axis of the energized coil 10 is collinear with the axis of the guide rod. Furthermore, the part of the guide rod 5 that is fitted by the energized coil 10 can be provided with an iron core to enhance the magnetism. Adsorbents are set on the attachment plate 8 and / or the attachment cylinder 7. The adsorbents need to be evenly arranged in the circumference to facilitate the balance of the attraction force. The adsorbents are metal materials that can be adsorbed, such as iron, cobalt, and nickel, or magnetic materials such as permanent magnets. The magnetism generates attraction so that the attachment plate 8 can remain stable when bubbles are generated, and avoids the unevenness of the bubbles causing the attachment plate 8 to tilt or float prematurely. The drain hole 11 facilitates the discharge of the mixed liquid when the bubbles are generated and grow.

[0036] Sensor 13 is a distance sensor that detects the distance to the inner wall of the attachment cylinder 7. When the attachment cylinder 7 sinks to the position of sensor 13, it generates an electrical signal to control the energizing coil 10 to be energized, thereby generating attraction and then starting to ventilate. If sensor 13 is not used and timed ventilation is used, it may lead to inaccuracy, with ventilation occurring before the attachment plate 8 is reset, or after a long time since reset, but without ventilation. This is because the time for bubbles to rise is uncertain. Therefore, detection by sensor 13 can be more accurate and improve efficiency and stability.

[0037] Initially, current is directly applied to the energized coil 10 to generate attraction. Then, a heat exchange gas medium is introduced through the air pipe 12. As the bubbles grow, they gradually concentrate at the bottom center of the attachment plate 8. Part of the mixture inside the support seat 9 is discharged from the drain hole 11. When the bubbles reach a predetermined value (enough for the attachment plate 8 to slowly float), the current to the energized coil 10 is disconnected, and the attachment plate 8 floats with the bubbles. Figure 5 As shown, when the attachment plate 8 reaches the liquid level, it is in the same state as the bubble overflow described above. Then the attachment plate 8 sinks until the attachment cylinder 7 reaches the position of the sensor 13, and the next bubble replenishment and cycle is performed.

[0038] See Figure 5When bubbles overflow from the liquid surface, they are unstable, resulting in an unstable tilting state of the attachment plate 8. The tilting angle may be small, causing gas to remain at the lower center of the attachment plate 8, reaching an equilibrium state where the attachment plate 8 floats on the surface of the mixture. To avoid this, a pressure rod 14 is fixed to the upper side wall of the guide rod 5. The lower end of the pressure rod 14 abuts against the upper surface of the attachment plate 8 before it approaches the liquid. Due to the buoyancy of the bubbles, the pressure rod 14 causes localized stress on the attachment plate 8, leading to overall imbalance and tilting. This also causes the bubbles to shift. Figure 6 The solid-line bubble, when tilted to a certain angle, i.e. Figure 6 As shown, the lower edge of the right side of the cross-section of the attachment plate 8 is horizontal or lower on the left and higher on the right (the larger the tilt angle, the better; however, the larger the tilt angle, the larger the diameter of the matching sphere 6 needs to be, so a balance between the two is best). The bubbles are as follows... Figure 6 The dotted bubble-like structures in the middle begin to overflow without leaving any residue. Because the bubbles have completely overflowed, the tilted attachment plate 8 tilts and sinks directly.

[0039] To minimize the adhesion of crystals precipitated in the mixture, the attachment plate 8, attachment cylinder 7, sphere 6, guide rod 5, and bearing seat 9 are all made of heat-insulating material to reduce the impact of temperature.

[0040] See Figure 7 , Figure 8 and Figure 9 Because of the limitation of the guide rod 5, the stirring range of the stirring rod 3 will be reduced. Therefore, a protruding rib 15 is provided on the attachment plate 8. During the upward movement of the attachment plate 8, the protruding rib 15 will rotate in the mixture due to the variable diameter spiral setting, thereby driving the local stirring of the mixture and forming a spiral columnar flow from bottom to top. However, since the rotation of the protruding rib 15 is mainly due to the reaction force of the mixture, it is relatively limited. By providing a spiral guide strip 16 on the guide rod 5, which cooperates with the spiral groove 17 on the inner surface of the ball 6, the attachment plate 8 will rotate, thereby actively driving the mixture to flow.

[0041] The protruding rib 15 and the spiral guide bar 16 rotate in the same direction, causing the flow of the mixture to diffuse outwards from the axis of the guide post 5, such as... Figure 9 As shown, it is the unfolded shape of the inner surface of the sphere 6. The expansion groove 18 is opened to reduce the contact surface between the inner surface of the sphere 6 and the spiral groove 17, thereby reducing static friction and reducing the resistance to motion.

[0042] In the description of this invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An adjustable crystallizer for fatty acid preparation, comprising a crystallization vessel (1) and a vessel cover (2), wherein a stirring shaft (3) is provided on the vessel cover (2), and a jacket layer (4) is provided on the outer wall of the crystallization vessel (1), characterized in that: The inner bottom wall surface of the crystallization vessel (1) is fixed with several vertically arranged guide rods (5). The guide rods (5) are evenly distributed inside the crystallization vessel (1). A sphere (6) and an attachment cylinder (7) slide on the guide rods (5). The attachment cylinder (7) is integral with the sphere (6) and located below the sphere (6). An attachment plate (8) is fitted on the outer surface of the sphere (6). The annular surface at the contact point between the attachment plate (8) and the sphere (6) includes the center of the sphere (6). The attachment plate (8) faces downward in an umbrella shape. (8) The lower surface of the sphere (6) and the attachment cylinder (7) form the attachment body of the bubble. The overall average density of the attachment plate (8), the attachment cylinder (7) and the sphere (6) is higher than the average density of the mixed liquid in the crystallization vessel (1). The crystallization vessel (1) is provided with a gas pipe (12) that is connected from outside the vessel to inside the vessel and corresponds to the attachment plate (8). The gas pipe (12) is connected to the heat exchange gas medium. The port of each gas pipe (12) is located below the corresponding attachment plate (8). Under the action of the bubble, the attachment plate (8) floats up. The inner bottom wall of the crystallization vessel (1) is also fixed with a support seat (9) corresponding to the guide rod (5). The support seat (9) is used to support the attachment plate (8). The support seat (9) is annular and coaxially arranged with the corresponding guide rod (5). The support seat (9) is provided with an axially vertically arranged energized coil (10). The attachment cylinder (7) and / or the attachment plate (8) are provided with an adsorbent that can be magnetically attracted. The side wall of the support seat (9) is provided with a drain hole (11). The drain hole (11) is lower than the port of the corresponding gas pipe (12) in the vertical direction. The guide rod (5) is embedded with a sensor (13) for detecting the position of the attachment cylinder (7). When the attachment plate (8) sits on the support seat (9), the sensor (13) sends a signal to energize the energized coil (10).

2. The adjustable crystallizer for fatty acid preparation according to claim 1, characterized in that: The upper end side wall of the guide rod (5) is fixed with a pressure rod (14) that abuts against the attachment plate (8), which tilts the attachment plate (8) when it rises to the position of the liquid surface of the mixture.

3. The adjustable crystallizer for fatty acid preparation according to claim 1, characterized in that: The attachment plate (8), attachment cylinder (7), sphere (6), guide rod (5) and bearing seat (9) are all made of heat-insulating material.

4. The adjustable crystallizer for fatty acid preparation according to claim 1, characterized in that: The upper surface of the attachment plate (8) is provided with several protruding ribs (15) evenly distributed along the circumference. The protruding ribs (15) are spiral-shaped with varying diameters, and the spiral diameter increases from the axial direction of the attachment plate (8) to the surrounding area.

5. The adjustable crystallizer for fatty acid preparation according to claim 4, characterized in that: The surface of the guide rod (5) is provided with a spiral guide strip (16), and the inner surface of the ball (6) is provided with a spiral groove (17) that is adapted to the spiral guide strip (16).

6. The adjustable crystallizer for fatty acid preparation according to claim 5, characterized in that: The protruding rib (15) has the same rotation direction as the spiral guide bar (16).

7. The adjustable crystallizer for fatty acid preparation according to claim 5, characterized in that: The inner surface of the sphere (6) is provided with expansion grooves (18) at both ends of the spiral groove (17).

8. The adjustable crystallizer for fatty acid preparation according to claim 2, characterized in that: When the attachment plate (8) is in the maximum tilt state of contacting the pressure bar (14), the contact point between the pressure bar (14) and the attachment plate (8) and the cross section of the plane containing the axis of the attachment plate (8) are tilted upward.

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