An inner guide cone for a medium pressure crystallizer

Abstract

This utility model relates to the field of crystallization tank technology in the chemical and pharmaceutical industries, specifically to an inner guide tube for a medium-pressure crystallization tank. It includes a crystallization tank body and an inner guide tube disposed inside the crystallization tank body. The inner guide tube consists of an inner cylinder and an outer cylinder. A support plate is disposed between the inner cylinder and the outer cylinder. Several support plates are equidistantly distributed in a circular pattern between the inner and outer cylinders, with an angle α between adjacent support plates. In this utility model, the guide plates inside the inner guide tube and the outer cylinder both employ a special structural design, allowing the guide plates and the inner and outer cylinders to be reliably welded together as a single component to jointly bear the operating pressure of the crystallization tank. The structure of the guide plate enables smooth fluid flow inside the inner guide tube, achieving good heat exchange.

Description

Technical Field

[0001] This utility model relates to the field of crystallizer technology in chemical and pharmaceutical industries, specifically to an inner guide tube for a medium-pressure crystallizer. Background Technology

[0002] Crystallizers are essential equipment in chemical and pharmaceutical production. They use heat transfer to evaporate some of the solvent or lower the temperature of the mother liquor, bringing it to a supersaturated state. This allows the solute to crystallize within the crystallizer, forming crystals of a specific size. To ensure uniform temperature or concentration within the crystallizer, and thus uniform and controllable supersaturation, a W-shaped lower head, an internal guide tube, and an axial-flow agitator are typically used in combination.

[0003] The inner guide tube generally adopts a hollow structure. In addition to cooperating with the W-shaped lower end cap and axial flow agitator to form a suitable flow pattern for the fluid inside the crystallizer, the cavity sandwiched in the middle is filled with a heat transfer medium or a cold medium, which together with the outer jacket provides a heat exchange surface for the heat exchange of the material inside the crystallizer.

[0004] Currently, the operating pressure inside the crystallizer is generally atmospheric or low pressure (≤0.6MPa). The inner guide tube consists of an inner cylinder, an outer cylinder, and upper and lower semi-circular tubes for sealing. A guide plate to prevent short circuits is generally installed between the inner and outer cylinders. The guide plate is welded to one side of the inner or outer cylinder, while the other side is not welded. The material of the inner guide tube is the same as that of the crystallizer's inner container, generally low alloy steel, austenitic stainless steel, duplex stainless steel, non-ferrous metals, or other metallic materials.

[0005] Currently, crystallizers used in the chemical and pharmaceutical industries are developing towards higher specifications and parameters. The operating pressure of crystallizers is continuously increasing, with some crystallizers reaching 2.5 MPa or higher, falling within the medium pressure range (1.6 MPa-10 MPa). The pressure-bearing capacity of the original internal guide tubes is generally below 0.6 MPa. When the operating pressure of the crystallizer increases, exceeding the pressure-bearing limit of the internal guide tube will cause plastic deformation failure of the internal guide tube.

[0006] Therefore, an internal guide tube for medium-pressure crystallizers is proposed to solve the problems mentioned above. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides an inner guide tube for medium-pressure crystallizers, which can solve the problem of insufficient pressure-bearing capacity of the inner guide tube under the operating pressure of medium-pressure crystallizers, enabling the inner guide tube to be used safely in medium-pressure crystallizers.

[0008] To achieve the above objectives, the present invention provides the following technical solution: including a crystallization tank and an inner guide tube disposed inside the crystallization tank, the inner guide tube being composed of an inner tube and an outer tube;

[0009] A support plate is provided between the inner cylinder and the outer cylinder. There are several support plates, and the several support plates are distributed at equal intervals.

[0010] Preferably, a plurality of the support plates are distributed in a circular pattern at equal intervals between the inner cylinder and the outer cylinder, the support plates are perpendicular to the inner cylinder and the outer cylinder, and the angle between two adjacent support plates is α.

[0011] Preferably, one end of the support plate is inserted into the inner wall of the outer cylinder, and the contact surface between the support plate and the outer cylinder is fixed by welding.

[0012] Preferably, the other end surface of the support plate is connected to the outer wall of the inner cylinder, and the connection between the support plate and the inner cylinder is fixed by welding.

[0013] Preferably, a guide plate is provided between two adjacent support plates, and the guide plate is distributed in a staggered ring shape.

[0014] Preferably, a second guide plate is provided between the support plate and the outer cylinder, and there are at least two second guide plates, with the other second guide plate located between the support plate and the inner cylinder.

[0015] Compared with the prior art, this utility model provides an inner guide tube for a medium-pressure crystallizer, which has the following beneficial effects:

[0016] 1. The guide plate inside the inner guide tube and the outer cylinder both adopt a special structural design, which allows the guide plate and the inner and outer cylinders to be reliably welded together as a whole component to jointly bear the operating pressure of the crystallizer.

[0017] 2. The structure of the guide plate allows the fluid inside the inner guide tube to flow smoothly, thus achieving a good heat exchange effect. Attached Figure Description

[0018] Figure 1 This is a side sectional view of the present invention.

[0019] Figure 2 This is a schematic diagram of the support plate in the welding state of this utility model;

[0020] Figure 3 This is a schematic diagram of the unfolded structure of this utility model;

[0021] Figure 4 This is a top view of the internal guide tube structure of this utility model;

[0022] Figure 5 This is a side sectional view of the crystallization tank of this utility model.

[0023] In the diagram: 2. Inner cylinder; 3. Outer cylinder; 4. Support plate; 5. Guide plate one; 6. Guide plate two. Detailed Implementation

[0024] 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.

[0025] Example:

[0026] Please see Figure 1 - Figure 5 An inner guide tube for a medium-pressure crystallizer in this embodiment includes a crystallizer body and an inner guide tube disposed inside the crystallizer body. The inner guide tube is composed of an inner tube 2 and an outer tube 3.

[0027] A support plate 4 is provided between the inner cylinder 2 and the outer cylinder 3. There are several support plates 4, and the several support plates 4 are distributed at equal intervals.

[0028] Among them, by placing the stable inner guide tube inside the crystallization tank and supporting it through the connection of multiple support plates 4 between the inner tube 2 and the outer tube 3, it has a stronger support effect and improves its support strength during use compared to the traditional inner guide tube.

[0029] By setting multiple support plates 4 and distributing them evenly, the inner wall of the inner cylinder 2 can be provided with uniform support when it is subjected to force. This effectively prevents excessive force at a certain point, resulting in uneven force distribution, incomplete force distribution of the device, and affects its overall support strength, thereby improving the support strength of the inner guide cylinder during use.

[0030] Several support plates 4 are distributed in a circular pattern at equal intervals between the inner cylinder 2 and the outer cylinder 3. The support plates 4 are perpendicular to the inner cylinder 2 and the outer cylinder 3, and the angle between two adjacent support plates 4 is α.

[0031] By setting the distribution state of the support plate 4 to be perpendicular to the inner cylinder 2 and the outer cylinder 3, it satisfies the stability of the force transmission between the outer cylinder 3 and the inner cylinder 2, so that the force on the inner cylinder 2 is transmitted vertically. In the vertical state of the inner cylinder 2 itself, the force can be dispersed over a certain length before being transmitted to the outer cylinder 3, thereby increasing the transmission range of the inner cylinder 2, the outer cylinder 3 and the support plate 4 when in contact with the force, thus achieving the effect of dispersing and transmitting the force for a longer time and over a longer distance, improving the load-bearing strength of the inner guide cylinder, and further improving the pressure-bearing performance of the inner guide cylinder;

[0032] By setting the included angle α between two adjacent support plates 4 to 20°, the gap between the two adjacent support plates 4 is ensured to meet the effect of force support, ensuring that the force can be transmitted to multiple support plates 4 in a timely manner at the same time. Furthermore, the force-bearing range is increased, the support strength is guaranteed, and the included angle α is set differently according to the number and thickness of the support plates 4 to meet various usage methods.

[0033] One end of the support plate 4 is inserted into the inner wall of the outer cylinder 3, and the contact surface between the support plate 4 and the outer cylinder 3 is fixed by welding.

[0034] The other end of the support plate 4 is connected to the outer wall of the inner cylinder 2, and the connection between the support plate 4 and the inner cylinder 2 is fixed by welding.

[0035] By fully welding the support plate 4 to the outer cylinder 3 and the support plate 4 to the inner cylinder 2, the tightness of the connection between the two ends of the support plate 4 and the inner cylinder 2 and the outer cylinder 3 is ensured, so that it can have stable strength support when transmitting force and supporting. By grinding the welded parts, the smoothness of its overall surface is ensured, and a certain point protrusion is prevented from causing excessive force concentration.

[0036] Furthermore, by continuously and fully welding the support plate 4 to the inner cylinder 2 and the outer cylinder 3, and using a welding process of single-sided bevel and full penetration on the back side, the tightness of the connection is ensured.

[0037] A guide plate 5 is provided between two adjacent support plates 4, and the guide plate 5 is distributed in a staggered ring shape.

[0038] A second guide plate 6 is provided between the support plate 4 and the outer cylinder 3. There are at least two guide plates 6, and the other guide plate 6 is located between the support plate 4 and the inner cylinder 2.

[0039] Furthermore, the structural shapes of the first guide plate 5 and the second guide plate 6 are set to similar inclined or arc-shaped structures to ensure smooth flow of fluid inside the guide tube.

[0040] By using the same welding method and post-weld treatment to guide plate 5 and guide plate 6, guide plate 5 and guide plate 6 are connected and fixed to inner cylinder 2, outer cylinder 3 and support plate 4, which can further provide support for support plate 4 and ensure the overall connection strength of the device.

[0041] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0042] 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. An inner guide tube for a medium-pressure crystallizer, characterized in that: It includes a crystallization tank and an inner guide tube disposed inside the crystallization tank, the inner guide tube being composed of an inner tube (2) and an outer tube (3); A support plate (4) is provided between the inner cylinder (2) and the outer cylinder (3). There are several support plates (4), and the several support plates (4) are distributed at equal intervals.

2. The inner guide tube for a medium-pressure crystallizer according to claim 1, characterized in that: Several support plates (4) are distributed in a circular pattern at equal intervals between the inner cylinder (2) and the outer cylinder (3). The support plates (4) are perpendicular to the inner cylinder (2) and the outer cylinder (3), and the angle between two adjacent support plates (4) is α.

3. The inner guide tube for a medium-pressure crystallizer according to claim 2, characterized in that: One end of the support plate (4) is inserted into the inner wall of the outer cylinder (3), and the contact surface between the support plate (4) and the outer cylinder (3) is fixed by welding.

4. The inner guide tube for a medium-pressure crystallizer according to claim 1, characterized in that: The other end surface of the support plate (4) is connected to the outer wall of the inner cylinder (2), and the connection between the support plate (4) and the inner cylinder (2) is fixed by welding.

5. The inner guide tube for a medium-pressure crystallizer according to claim 1, characterized in that: A guide plate (5) is provided between two adjacent support plates (4), and the guide plate (5) is distributed in a staggered ring.

6. The inner guide tube for a medium-pressure crystallizer according to claim 5, characterized in that: A second guide plate (6) is provided between the support plate (4) and the outer cylinder (3). There are at least two second guide plates (6), and the other second guide plate (6) is located between the support plate (4) and the inner cylinder (2).

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