Crystallization kettle for stevioside production

Abstract

The utility model provides a crystallization kettle for stevioside production, which belongs to the technical field of stevioside production and comprises a shell and a crystallization component arranged on the inner wall of the shell, the crystallization component comprises a mounting plate, a driving shaft, a mounting frame, a spiral table, a flow guide shell, a metal net, a heating shell and a spray head, the mounting plate is embedded in the inner wall of the shell close to the top, and the driving shaft is arranged on the mounting frame. The driving shaft is rotationally embedded in the center of the inner wall of the mounting plate, the mounting frame is fixedly arranged on the outer wall of the driving shaft, the outer wall of the mounting frame is fixedly sleeved with the spiral table, and the spiral table is matched with the shell. Through the crystallization assembly, a solution containing stevioside can uniformly drop onto a spiral table, the solution slowly descends through the spiral table and is attached to the inner wall of the shell, crystals are efficiently scraped through rotation of the spiral table, and the situation that a large number of crystals are attached to the inner wall of the shell, so that the heat conduction efficiency is reduced is avoided; and finally, part of crystals and charring are caused.

Description

Technical Field

[0001] The utility model belongs to the technical field of steviol glycoside production, and particularly relates to a crystallization kettle for steviol glycoside production. Background Art

[0002] The production of steviol glycosides (also known as stevioside) primarily involves the extraction and refining of glycosides from the leaves of the Stevia rebaudiana plant, a member of the Asteraceae family. Raw material processing: The dried stevia is crushed for subsequent extraction. Impurities and substandard leaves are removed to ensure the purity of the raw material. Extraction method: Steviosides are typically extracted using either water extraction or alcohol extraction. The appropriate extraction method is selected based on product requirements. The water extraction method involves soaking the crushed stevia leaves in water and filtering and concentrating them to obtain a steviol glycoside extract; the alcohol extraction method uses organic solvents such as ethanol for extraction. Refining process: The extract undergoes further refining processes such as filtration, concentration, and crystallization to obtain a high-purity steviol glycoside product. This process may involve the use of ion exchange, activated carbon decolorization, and other technologies to remove impurities and improve the purity and quality of the product.

[0003] In order to reduce energy consumption, existing clean kettles stir the solution at high speed to avoid crystal accumulation and adhesion, which reduces heat conduction efficiency. However, some crystals may burn due to direct contact with the inner wall of the reactor. Moreover, a large number of crystals may cause some stirring structures to become stuck, ultimately requiring frequent maintenance and parts replacement. Utility Model Content

[0004] The purpose of the utility model is to provide a crystallization kettle for the production of steviol glycosides, aiming to solve the problems raised by the background technology.

[0005] A crystallization kettle for producing steviol glycosides, comprising:

[0006] shell;

[0007] A crystallization component is arranged on the inner wall of the shell, wherein: the crystallization component includes a mounting plate, a drive shaft, a mounting frame, a spiral table, a guide shell, a metal mesh, a heating shell and a nozzle; the mounting plate is embedded in the inner wall of the shell near the top; the drive shaft is rotatably embedded in the center of the inner wall of the mounting plate; the mounting frame is fixedly arranged on the outer wall of the drive shaft; the spiral table is fixedly sleeved on the outer wall of the mounting frame; the spiral table and the shell match each other; the guide shell is embedded in the inner wall of the shell near the bottom; the metal mesh is embedded in the inclined surface opening of the guide shell; the heating shell is embedded at the bottom of the inner wall of the shell; and the nozzle is embedded at the bottom of the outer wall of the mounting plate.

[0008] Furthermore, the outer wall of the shell is provided with a heating jacket.

[0009] Furthermore, a scraper is fixedly provided on the outer wall of the bottom end of the driving shaft.

[0010] Furthermore, the scraper and the heating shell match each other.

[0011] Furthermore, a driving motor is fixedly mounted on the top of the outer wall of the housing.

[0012] Furthermore, the output end of the driving motor is fixedly arranged on the top outer wall of the driving shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Through the crystallization component, the solution containing steviol glycosides can be evenly dripped onto the spiral table. The spiral table allows the solution to slowly descend and adhere along the inner wall of the shell. The rotation of the spiral table is used to efficiently scrape the crystals, avoiding a large amount of crystals adhering to the inner wall of the shell, resulting in reduced heat conduction efficiency and ultimately causing some crystals to burn. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a partial half-section perspective view of the present utility model;

[0018] Figure 3 It is a three-dimensional diagram of the spiral table of the present invention.

[0019] In the figure: 1. Outer shell; 2. Heating jacket; 3. Driving motor; 4. Mounting plate; 5. Driving shaft; 6. Mounting frame; 7. Spiral table; 8. Guide shell; 9. Metal mesh; 10. Heating shell; 11. Scraper; 12. Nozzle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0023] See also Figure 1-3 , the technical solutions provided in this embodiment are as follows:

[0024] A crystallization kettle for producing steviol glycosides, comprising:

[0025] Shell 1;

[0026] The crystallization component is arranged on the inner wall of the shell 1, wherein: the crystallization component includes a mounting plate 4, a drive shaft 5, a mounting frame 6, a spiral table 7, a guide shell 8, a metal mesh 9, a heating shell 10 and a nozzle 12. The mounting plate 4 is embedded in the inner wall of the shell 1 near the top, the drive shaft 5 is rotatably embedded in the center of the inner wall of the mounting plate 4, the mounting frame 6 is fixedly arranged on the outer wall of the drive shaft 5, the spiral table 7 is fixedly sleeved on the outer wall of the mounting frame 6, the spiral table 7 and the shell 1 match each other, the guide shell 8 is embedded in the inner wall of the shell 1 near the bottom, the metal mesh 9 is embedded in the inclined surface opening of the guide shell 8, the heating shell 10 is embedded at the bottom of the inner wall of the shell 1, and the nozzle 12 is embedded at the bottom of the outer wall of the mounting plate 4.

[0027] In a specific embodiment of the present invention, the crystallization component can be used to uniformly drip the solution containing steviol glycosides onto the spiral platform 7. The solution is slowly dropped by the spiral platform 7 and adheres to the inner wall of the shell 1. The rotation of the spiral platform 7 is used to efficiently scrape the crystals, thereby avoiding a large amount of crystals adhering to the inner wall of the shell 1, which reduces the heat conduction efficiency and eventually causes some crystals to burn. The steviol glycoside solution is fully stirred by an external stirring device, and then the solution is pressurized and injected into the input end of the nozzle 12 using a valve, a pump group and a pipeline. The nozzle 12 injects the solution into the inner wall of the spiral platform 7, and the solution slowly flows along the inner wall of the spiral platform 7 and the shell 1. The heating sleeve 2 is started to heat the outer shell 1, and the solution is partially crystallized in the inner part of the outer shell 1. Then the driving motor 3 is started, so that the driving shaft 5 drives the mounting frame 6 and the spiral platform 7 to rotate, so as to scrape the inner wall of the outer shell 1. The crystals fall onto the guide shell 8 along the spiral platform 7, and the remaining solution drips into the inner part of the guide shell 8 through the metal mesh 9 and is collected. After collection, it is recycled, and the crystals fall into the inner part of the heating shell 10 to complete the final evaporation. The crystallized powder is discharged by means of valves and pipes. When the outer shell 1 is heated, water vapor is discharged through the external pipe to ensure the internal pressure balance of the outer shell 1. The driving shaft 5 is used to drive the scraper 11 to rotate, and then the crystal discharge and drying are accelerated.

[0028] Specifically, the outer wall of the housing 1 is covered with a heating jacket 2 .

[0029] In a specific embodiment of the present invention, the heating jacket 2 can provide a stable heat source.

[0030] Specifically, a scraper 11 is fixedly provided on the outer wall of the bottom end of the driving shaft 5 .

[0031] In a specific embodiment of the present invention, the scraper 11 can accelerate the drying of the crystals and the release of water vapor.

[0032] Specifically, the scraper 11 and the heating shell 10 match each other.

[0033] In a specific embodiment of the present invention, the scraper 11 and the heating shell 10 match each other to avoid crystallization adhesion.

[0034] Specifically, a driving motor 3 is fixedly mounted on the top of the outer wall of the housing 1 .

[0035] In a specific embodiment of the present invention, the driving motor 3 can achieve high torque output.

[0036] Specifically, the output end of the driving motor 3 is fixedly arranged on the top outer wall of the driving shaft 5 .

[0037] In a specific embodiment of the present invention, the output end of the driving motor 3 is fixedly arranged on the outer wall of the top end of the driving shaft 5, so as to achieve stable power transmission.

[0038] Working principle:

[0039] Through the crystallization component, the solution containing steviol glycosides can be evenly dripped onto the spiral platform 7. The solution is slowly dropped through the spiral platform 7 and adhered to the inner wall of the shell 1. The rotation of the spiral platform 7 is used to efficiently scrape the crystals, avoiding a large amount of crystals adhering to the inner wall of the shell 1, which leads to a decrease in heat conduction efficiency and eventually causes some crystals to burn. The steviol glycoside solution is fully stirred by an external stirring device, and then the solution is pressurized and injected into the input end of the nozzle 12 using valves, pump groups and pipelines. The nozzle 12 injects the solution into the inner wall of the spiral platform 7, and the solution slowly flows along the inner wall of the spiral platform 7 and the shell 1. At this time, the heating jacket 2 is started to heat the shell 1, and the solution partially crystallizes inside the shell 1. Then the drive motor 3 is started, so that the drive shaft 5 drives the mounting frame 6 and the spiral platform 7 to rotate, so as to scrape the inner wall of the shell 1. The crystals fall onto the guide shell 8 along the spiral platform 7. The remaining solution drips into the inside of the guide shell 8 through the metal mesh 9 and is collected for recycling after collection. The crystals fall into the inside of the heating shell 10 to complete the final evaporation. The crystallized powder is discharged through the valve and pipeline. When the shell 1 is heated, water vapor is discharged through the external pipeline to ensure the internal pressure balance of the shell 1. The drive shaft 5 drives the scraper 11 to rotate, and then the crystal discharge and drying are accelerated.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A crystallization kettle for producing steviol glycosides, characterized in that: include, Housing (1); A crystallization component is arranged on the inner wall of the shell (1), wherein: the crystallization component includes a mounting plate (4), a driving shaft (5), a mounting frame (6), a spiral platform (7), a guide shell (8), a metal mesh (9), a heating shell (10) and a nozzle (12); the mounting plate (4) is embedded in the inner wall of the shell (1) near the top; the driving shaft (5) is rotatably embedded in the center of the inner wall of the mounting plate (4); the mounting frame (6) is fixedly arranged on the outer wall of the driving shaft (5); the spiral platform (7) is fixedly sleeved on the outer wall of the mounting frame (6); the spiral platform (7) and the shell (1) match each other; the guide shell (8) is embedded in the inner wall of the shell (1) near the bottom; the metal mesh (9) is embedded in the inclined surface opening of the guide shell (8); the heating shell (10) is embedded in the bottom of the inner wall of the shell (1); and the nozzle (12) is embedded in the bottom of the outer wall of the mounting plate (4).

2. A crystallization kettle for steviol glycoside production according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a heating jacket (2).

3. A crystallization kettle for steviol glycoside production according to claim 2, characterized in that: A scraper (11) is fixedly provided on the outer wall of the bottom end of the driving shaft (5).

4. A crystallization kettle for steviol glycoside production according to claim 3, characterized in that: The scraper (11) and the heating shell (10) match each other.

5. A crystallization kettle for producing steviol glycosides according to claim 4, characterized in that: A driving motor (3) is fixedly arranged on the top of the outer wall of the housing (1).

6. A crystallization kettle for steviol glycoside production according to claim 5, characterized in that: The output end of the driving motor (3) is fixedly arranged on the top outer wall of the driving shaft (5).

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