A dtb crystallizer

Abstract

This utility model relates to the field of crystallizers and discloses a DTB crystallizer. It solves the problem that during the crystallization process, some large crystals fall due to gravity settling or fluctuations in the circulating flow rate. Since the agitator is located below, the fallen crystals easily enter the gaps between the agitator blades and the guide tube, or between the blades and the bushing. When the crystal particle size exceeds the gap size, or when the agitation speed is too low, causing a decrease in the fluidity of the crystal slurry, the crystals easily get stuck in the gaps, affecting production efficiency. The DTB crystallizer includes a shell, a motor located below the shell, and a rotating shaft fixedly connected to the motor output end. The movement of a first guide rod within a "V"-shaped second guide groove drives the rotating rod and agitator blades to move downwards as a whole. Simultaneously, the interaction between push rods and connecting rods of varying heights effectively shakes off the crystals stuck between the blades due to the combined effect of the changing spacing and the downward movement of the blades.

Description

Technical Field

[0001] This utility model relates to the field of crystallizers, specifically a DTB crystallizer. Background Technology

[0002] In the field of industrial crystallization, DTB crystallizers are widely used due to their ability to efficiently produce uniform crystals. The placement of the agitator at the bottom of the device is a necessary choice based on its core working principle. One type of DTB crystallizer relies on a "bottom-in, top-out" circulation of the crystal slurry to achieve uniform crystallization. With the agitator positioned at the bottom, it can directly act on the mixture of raw material liquid and circulating mother liquor at the bottom of the guide tube. The upward thrust generated by the rotating propeller blades forces the crystal slurry to rise along the guide tube to the liquid surface to complete vacuum flash crystallization. If the agitator is moved upwards, it will not be able to effectively drive the circulation of the bottom liquid, disrupting the crystallization balance.

[0003] However, this design has a potential for crystal jamming. During crystallization, some of the grown crystals may fall due to gravity settling or fluctuations in the circulation rate. Since the agitator is located below, these fallen crystals can easily enter the gaps between the agitator blades and the guide tube, or between the blades and the bushing. When the crystal particle size exceeds the gap size, or when the agitator speed is too low, causing a decrease in the fluidity of the crystal slurry, the crystals can easily become stuck in the gaps.

[0004] Crystal jamming directly worsens the mixing effect: On the one hand, jammed crystals hinder the normal rotation of the blades, reduce the circulating thrust, slow down the upward flow rate of the crystal slurry, cause uneven mixing, increase the difference in local supersaturation, and lead to an increase in fine crystals and uneven particle size; on the other hand, jamming increases the mixing load, which may lead to motor overload and unstable speed, further disrupting the crystallization cycle and forming a vicious cycle of "jamming-mixing failure-abnormal crystallization", affecting product quality and production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a DTB crystallizer, which solves the problems affecting product quality and production efficiency when used in operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a DTB crystallizer, comprising a housing, a motor disposed below the housing, a rotating shaft fixedly connected to the output end of the motor, stirring blades disposed above the rotating shaft, a reciprocating mechanism disposed inside the rotating shaft, and an elastic mechanism disposed inside the reciprocating mechanism.

[0007] The inner side of the rotating shaft is provided with a first groove, and the reciprocating mechanism includes a rotating rod provided inside the first groove. The outer side of the rotating shaft is provided with a support cylinder that is fixedly connected to the outer shell. The inner wall of the support cylinder is provided with a first guide groove. One end of the first guide groove is connected to a second guide groove. The inner side of the second guide groove is provided with a first guide rod that is fixedly connected to the rotating rod.

[0008] Preferably, the inner side of the first groove fits against the outer side of the lower end of the rotating rod, and the lower end of the rotating rod has a cuboid shape, while the upper end of the rotating rod has a cylindrical shape.

[0009] Preferably, the central axis of the support cylinder is parallel to the central axis of the outer shell, and the outer surface of the support cylinder is in contact with the rotating shaft.

[0010] Preferably, the first guide groove has a horizontal arc shape, and the first guide groove and the first guide rod are fitted with a clearance fit.

[0011] Preferably, the second guide groove has a "V" shaped appearance, and the second guide groove and the first guide rod are fitted with a clearance fit.

[0012] Preferably, the elastic mechanism includes a push rod fixedly connected to the bottom surface of the first groove, a first hole is provided inside the rotating rod, an elastic rubber pad is fixedly connected to the upper end of the first hole, a second hole is connected to the outside of the first hole, and a connecting rod fixedly connected to the push rod is provided inside the second hole, and the connecting rod is fixedly connected to the stirring blade.

[0013] Preferably, the central axis of the push rod is parallel to the central axis of the second hole, and multiple push rods are fixed on the bottom surface of the first groove, with each push rod having a different height.

[0014] Preferably, the outer side of the connecting rod fits into the inner side of the lower end of the first hole, and the connecting rod has a cuboid shape.

[0015] 1. This utility model proposes a DTB crystallizer, in which the movement of a first guide rod within a "V"-shaped second guide groove drives the rotating rod and stirring blades to move downwards as a whole; simultaneously, the interaction between push rods and connecting rods of varying heights causes the stirring blades to shift to different degrees, dynamically changing their spacing. This effectively dislodges crystals stuck between the blades through the combined effect of the spacing change and the downward movement of the blades, reducing the adverse effects of crystal accumulation on the stirring process and improving production efficiency.

[0016] 2. The DTB crystallizer proposed in this utility model allows the surrounding water flow to impact the exposed or loosened crystals as the stirring blades move downwards and change their spacing. This accelerates the detachment and dissolution of the crystals, further improving the cleaning efficiency of the stirring area. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2This is a schematic diagram of the external structure of the rotating rod of this utility model;

[0019] Figure 3 This is a front cross-sectional view of the rotating rod of this utility model.

[0020] Figure 4 This is a bottom view cross-sectional structural diagram of the support cylinder of this utility model;

[0021] Figure 5 This is a schematic diagram of the external structure of the first guide groove of this utility model.

[0022] In the diagram: 1. Outer shell; 2. Motor; 3. Rotating shaft; 4. Stirring blade; 5. Reciprocating mechanism; 6. Elastic mechanism; 7. First groove; 51. Rotating rod; 52. Support cylinder; 53. First guide groove; 54. Second guide groove; 55. First guide rod; 61. Push rod; 62. First hole; 63. Elastic rubber pad; 64. Second hole; 65. Connecting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 The present invention provides a technical solution: a DTB crystallizer, comprising a housing 1, a motor 2 disposed below the housing 1, a rotating shaft 3 fixedly connected to the output end of the motor 2, a stirring blade 4 disposed above the rotating shaft 3, a reciprocating mechanism 5 disposed inside the rotating shaft 3, and an elastic mechanism 6 disposed inside the reciprocating mechanism 5.

[0025] A first groove 7 is provided on the inner side of the rotating shaft 3. The reciprocating mechanism 5 includes a rotating rod 51 disposed on the inner side of the first groove 7. A support cylinder 52 fixedly connected to the outer shell 1 is provided on the outer side of the rotating shaft 3. A first guide groove 53 is provided on the inner wall of the support cylinder 52. One end of the first guide groove 53 is connected to a second guide groove 54. A first guide rod 55 fixedly connected to the rotating rod 51 is provided on the inner side of the second guide groove 54. The inner side of the first groove 7 fits against the outer side of the lower end of the rotating rod 51. The lower end of the rotating rod 51 has a cuboid shape, and the upper end of the rotating rod 51 has a cylindrical shape, so that the rotating rod 51 moves within the first groove 7. During operation, the device can only move up and down, not rotate. The central axis of the support cylinder 52 is parallel to the central axis of the outer shell 1, and the support cylinder 52 is in contact with the outer surface of the rotating shaft 3. The first guide groove 53 has a horizontal arc shape, and the first guide groove 53 and the first guide rod 55 are fitted with a clearance fit, so that the first guide rod 55 will not move up and down when rotating inside the first guide groove 53. The second guide groove 54 has a "V" shape, and the second guide groove 54 and the first guide rod 55 are fitted with a clearance fit, so that the first guide rod 55 will move up and down when moving inside the second guide groove 54.

[0026] The elastic mechanism 6 includes a push rod 61 fixedly connected to the bottom surface of the first groove 7. The rotating rod 51 has a first hole 62 inside. An elastic rubber pad 63 is fixedly connected to the upper end of the first hole 62. The outer side of the first hole 62 is connected to a second hole 64. The inner side of the second hole 64 is provided with a connecting rod 65 fixedly connected to the push rod 61. The connecting rod 65 is fixedly connected to the stirring blade 4. The central axis of the push rod 61 is parallel to the central axis of the second hole 64. Multiple push rods 61 are fixed to the bottom surface of the first groove 7, and the height of each push rod 61 is different, so that the connecting rod 65 will move upward to different degrees after contacting the push rod 61. The outer side of the connecting rod 65 fits against the inner side of the lower end of the first hole 62. The external structure of the connecting rod 65 is cuboid, so that the connecting rod 65 will not rotate when moving inside the second hole 64.

[0027] When raw materials need to be mixed, the starter motor 2 drives the rotating shaft 3 to rotate, which in turn drives the rotating rod 51 and the first guide rod 55 to rotate inside the first guide groove 53 and the second guide groove 54. Because the appearance structure of the first guide groove 53 is a horizontal arc shape and the first guide groove 53 and the first guide rod 55 are in a clearance fit, and the appearance structure of the second guide groove 54 is a "V" shape and the second guide groove 54 and the first guide rod 55 are in a clearance fit, the first guide rod 55 moves downward when it moves to the inside of the second guide groove 54, which drives the rotating rod 51 to move downward along the trajectory of the first groove 7, which in turn drives the elastic rubber pad 63, the connecting rod 65 and the stirring blade 4 to move downward. Because the height of each push rod 61 is not consistent, the connecting rod 65 will block after contacting the push rod 61 and move upward to different degrees, which changes the spacing of each stirring blade 4, causing the crystals stuck between the stirring blades 4 to fall off, reducing the adverse effects caused by the stirring blades 4 and improving production efficiency.

[0028] Furthermore, the spacing between each stirring blade 4 changes, and the stirring blade 4 moves downward, allowing the water flow to impact the crystals between the stirring blades 4, enabling the crystals to detach more quickly and improving production efficiency.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A DTB crystallizer comprising a shell (1), a motor (2) arranged below the shell (1), a rotating shaft (3) fixedly connected to the output end of the motor (2), and stirring blades (4) arranged above the rotating shaft (3), characterized in that: The inner side of the rotating shaft (3) is provided with a reciprocating mechanism (5), and the inner side of the reciprocating mechanism (5) is provided with an elastic mechanism (6); The inner side of the rotating shaft (3) is provided with a first groove (7), and the reciprocating mechanism (5) includes a rotating rod (51) provided inside the first groove (7). The outer side of the rotating shaft (3) is provided with a support cylinder (52) fixedly connected to the outer shell (1). The inner wall of the support cylinder (52) is provided with a first guide groove (53). One end of the first guide groove (53) is connected to a second guide groove (54). The inner side of the second guide groove (54) is provided with a first guide rod (55) fixedly connected to the rotating rod (51).

2. A DTB crystalliser according to claim 1, characterised in that: The inner side of the first groove (7) is in contact with the outer side of the lower end of the rotating rod (51), and the lower end of the rotating rod (51) has a cuboid shape, while the upper end of the rotating rod (51) has a cylindrical shape.

3. A DTB crystallizer according to claim 1, characterized in that: The central axis of the support cylinder (52) is parallel to the central axis of the outer shell (1), and the support cylinder (52) is in contact with the outer side of the rotating shaft (3).

4. A DTB crystallizer according to claim 1, characterized in that: The first guide groove (53) has a horizontal arc shape, and the first guide groove (53) and the first guide rod (55) are fitted with a clearance fit.

5. A DTB crystallizer according to claim 1, characterized in that: The second guide groove (54) has a "V" shaped appearance and the second guide groove (54) and the first guide rod (55) are fitted with a clearance fit.

6. A DTB crystallizer according to claim 1, characterized in that: The elastic mechanism (6) includes a push rod (61) fixedly connected to the bottom surface of the first groove (7). The rotating rod (51) has a first hole (62) inside. An elastic rubber pad (63) is fixedly connected to the upper end of the first hole (62). A second hole (64) is connected to the outside of the first hole (62). A connecting rod (65) fixedly connected to the push rod (61) is provided on the inside of the second hole (64). The connecting rod (65) is fixedly connected to the stirring blade (4).

7. A DTB crystalliser according to claim 6, characterised in that: The central axis of the push rod (61) is parallel to the central axis of the second hole (64), and multiple push rods (61) are fixed on the bottom surface of the first groove (7), and the height of each push rod (61) is not consistent.

8. A DTB crystalliser according to claim 6, characterised in that: The outer side of the connecting rod (65) is in contact with the inner side of the lower end of the first hole (62), and the external structure of the connecting rod (65) is a cuboid.

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