Three-in-one stevioside production device

Abstract

The utility model discloses a three-in-one stevioside production device which comprises a dissolving tank, a crystallizing, filtering and drying three-in-one system and a mother liquor tank which are communicated with one another, the crystallizing, filtering and drying three-in-one system comprises a crystallizing, filtering and drying machine, a filtering mechanism arranged in the crystallizing, filtering and drying machine, and a lifting mechanism, a drying mechanism and a crystallizing mechanism which are connected with the crystallizing, filtering and drying machine; a mother liquor port at the bottom of the crystallization filtering dryer is communicated with a mother liquor tank through a mother liquor valve and a pipeline. The device integrates various processes of crystallization, filtration and drying, so that the risk in the solvent transfer process is reduced, the equipment investment is reduced, and the production safety of stevioside is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of stevioside production devices, in particular to a three-in-one stevioside production device. Background Art

[0002] Stevioside, also known as stevioside or steviol glycoside, is a glycoside extracted from the leaves of Stevia rebaudiana, a plant of the Asteraceae family. Stevia is native to Paraguay and Brazil. It has the characteristics of high sweetness and low calorie. Its sweetness is 200-300 times that of sucrose, and its calorific value is only 1 / 300 of that of sucrose.

[0003] In the production process of stevioside, solvents are needed to purify the crude mixed glycosides. During the purification process, the solvents need to go through production processes such as dissolution, crystallization, filtration, and drying. During the above process, the solvent is transported in multiple devices, and the safety risk increases. Therefore, how to reduce the transportation of solvents in multiple devices and reduce the risk is a problem that technicians in this field need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a three-in-one stevioside production device is provided, which integrates multiple processes of crystallization, filtration and drying, reduces the risk in the solvent transportation process, reduces equipment investment, and ensures the production safety of stevioside.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A three-in-one stevioside production device comprises a dissolving tank, a three-in-one crystallization filtering and drying system, and a mother liquid tank which are connected; the three-in-one crystallization filtering and drying system comprises a crystallization filtering and drying machine, a filtering mechanism arranged in the crystallization filtering and drying machine, and a lifting mechanism, a drying mechanism, and a crystallization mechanism connected to the crystallization filtering and drying machine; the crystallization mechanism comprises an ice water pipeline connected to a jacket of the crystallization filtering and drying machine through an ice water valve and a pipeline; the filtering mechanism comprises a filter screen arranged at the bottom of the crystallization filtering and drying machine and a liftable stirring rod arranged above the filter screen, the liftable stirring rod being connected to a reduction motor through a lifting shaft; the lifting mechanism comprises a hydraulic cylinder arranged at the top of the crystallization filtering and drying machine, the top end of the piston rod of the hydraulic cylinder is fixedly connected to a support frame, and the reduction motor is arranged on the support frame; the drying mechanism comprises a steam pipeline connected to the jacket of the crystallization filtering and drying machine through a steam valve and a pipeline; the mother liquid port at the bottom of the crystallization filtering and drying machine is connected to the mother liquid tank through a mother liquid valve and a pipeline.

[0007] Preferably, the dissolving tank is connected to the crystallization filter dryer through a pipeline, a valve and a feed pump.

[0008] Preferably, a temperature sensor is provided in the crystallization filter dryer, and the temperature sensor is interlocked with the ice water valve.

[0009] Preferably, the crystallization filter dryer is connected to a nitrogen backflush tank, the nitrogen backflush tank is connected to a nitrogen pipeline via a nitrogen valve, and the nitrogen valve and the mother liquor valve are interlocked with a temperature sensor.

[0010] Preferably, the mother liquid tank is provided with a weighing sensor, and the weighing sensor is interlocked with the steam valve.

[0011] Preferably, the air outlet at the top of the crystallization filter-dryer is sequentially connected to a first cooler, a solvent recovery tank, and a vacuum pump, and the vacuum pump is interlocked with a weighing sensor.

[0012] Preferably, the gas outlet of the solvent recovery tank is also connected to the second cooler, and the liquid outlet of the second cooler is connected to the solvent recovery tank.

[0013] Preferably, a stirring device is provided in the dissolving tank and the mother liquid tank.

[0014] Preferably, the crystallization filter-dryer is further provided with a discharge port above the filter screen, a discharge pipe is provided at the discharge port, and a discharge valve is provided on the discharge pipe.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model discloses a three-in-one stevioside production device, comprising a connected dissolving tank, a crystallization filtering and drying three-in-one system, and a mother liquid tank. The crystallization filtering and drying three-in-one system comprises a crystallization filtering and drying machine, a filtering mechanism arranged in the crystallization filtering and drying machine, and a crystallization mechanism, a drying mechanism and a lifting mechanism connected to the crystallization filtering and drying machine. The device realizes the integration of crystallization, filtration and drying of liquid feed, avoids the operation of solvent in multiple devices, reduces the risk in the process of solvent transportation, and reduces equipment investment.

[0017] The crystallization filter dryer of this device is equipped with a temperature sensor, which is interlocked with the ice water valve; the crystallization filter dryer is connected to a nitrogen backflush tank, which is connected to the nitrogen pipeline through a nitrogen valve, and the nitrogen valve, mother liquid valve and temperature sensor are interlocked; the mother liquid tank is equipped with a weighing sensor, which is interlocked with the steam valve; the air outlet at the top of the crystallization filter dryer is connected to the first cooler, solvent recovery tank and vacuum pump in sequence, and the vacuum pump is interlocked with the weighing sensor. The above settings can realize the automatic control of liquid crystallization, filtration and drying, improve the production efficiency of stevioside, save energy and reduce consumption, and increase production capacity.

[0018] The gas outlet of the solvent recovery tank of the device is also connected to the second cooler, and the liquid outlet of the second cooler is connected to the solvent recovery tank. The above arrangement can increase the solvent recovery efficiency and reduce the energy consumption of stevioside production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] In the figure, 1. dissolving tank; 2. crystallization filter dryer; 3. mother liquor tank; 4. ice water valve; 5. ice water pipeline; 6. filter; 7. liftable stirring rod; 8. lifting shaft; 9. reduction motor; 10. hydraulic cylinder; 11. support frame; 12. mother liquor valve; 13. steam valve; 14. steam pipeline; 15. temperature sensor; 16. nitrogen backflush tank; 17. nitrogen valve; 18. nitrogen pipeline; 19. weighing sensor; 20. first cooler; 21. solvent recovery tank; 22. vacuum pump; 23. second cooler; 24. stirring device; 25. discharge port; 26. discharge pipeline; 27. discharge valve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] like Figure 1 As shown, a three-in-one stevioside production device comprises a dissolving tank 1, a three-in-one crystallization filtering and drying system, and a mother liquid tank 3 which are connected; the three-in-one crystallization filtering and drying system comprises a crystallization filtering and drying machine 2, a filtering mechanism arranged in the crystallization filtering and drying machine 2, and a lifting mechanism, a drying mechanism, and a crystallization mechanism connected to the crystallization filtering and drying machine 2;

[0025] The crystallization mechanism includes an ice water pipeline 5 connected to the jacket of the crystallization filter dryer 2 through an ice water valve 4 and a pipeline. During crystallization, ice water is introduced into the jacket of the crystallization filter dryer 2 to cool and crystallize the feed liquid in the crystallization filter dryer 2.

[0026] The filtering mechanism includes a filter screen 6 arranged at the bottom of the crystallization filter dryer 2 and a liftable stirring rod 7 arranged above the filter screen 6, and the liftable stirring rod 7 is connected to the reduction motor 9 through a lifting shaft 8; the lifting mechanism includes a hydraulic cylinder 10 arranged at the top of the crystallization filter dryer 2, and the top end of the piston rod of the hydraulic cylinder 10 is fixedly connected to a support frame 11, and the reduction motor 9 is arranged on the support frame 11. The mother liquid port at the bottom of the crystallization filter dryer 2 is connected to the mother liquid tank 3 through a mother liquid valve 12 and a pipeline. During filtering, the mother liquid valve 12 is opened, the crystallized liquid is filtered through the filter screen 6, the mother liquid enters the mother liquid tank 3, the crystals are intercepted by the filter screen 6, and the liftable stirring rod 7 pushes the material downward under the joint action of the reduction motor 9, the lifting shaft 8, the support frame 11 and the hydraulic cylinder 10, and the crystals are continuously and evenly coated on the filter screen 6 by stirring, thereby improving the filtering efficiency.

[0027] The drying mechanism includes a steam pipe 14 connected to the jacket of the crystallization filter dryer 2 through a steam valve 13 and a pipeline; during drying, steam is introduced into the jacket of the crystallization filter dryer 2 through the steam pipe 14 to heat and dry the crystals in the crystallization filter dryer 2.

[0028] Furthermore, in this embodiment, a temperature sensor 15 is provided in the crystallization filter dryer 2, and the temperature sensor 15 is interlocked with the ice water valve 4. The crystallization filter dryer 2 is connected to a nitrogen backflush tank 16, and the nitrogen backflush tank 16 is connected to a nitrogen pipeline 18 through a nitrogen valve 17. The nitrogen valve 17 and the mother liquor valve 12 are interlocked with the temperature sensor 15. The temperature sensor 15 can monitor the temperature of the feed liquid in the crystallization filter dryer 2 in real time. When the crystallization is completed when the feed liquid is cooled to room temperature, the temperature sensor 15 transmits a signal to an external control system (not shown in the figure), and the external control system automatically controls the closing of the ice water valve 4, and opens the nitrogen valve 17 and the mother liquor valve 12. Under the pressure of nitrogen, the mother liquor in the crystallization feed liquid is pressed into the mother liquor tank 3 through the bottom filter screen 6, and the crystals are intercepted by the filter screen 6.

[0029] Furthermore, in this embodiment, the mother liquid tank 3 is provided with a weighing sensor 19, and the weighing sensor 19 is interlocked with the steam valve 13. The air outlet at the top of the crystallization filter dryer 2 is sequentially connected with the first cooler 20, the solvent recovery tank 21, and the vacuum pump 22, and the vacuum pump 22 is interlocked with the weighing sensor 19. The weighing sensor 19 is used to detect the change in the weight of the mother liquid in the mother liquid tank 3. When there is no obvious change in the weight, it means that there is no large amount of mother liquid discharged from the crystallization filter dryer 2, and the drying process is entered. The external control system automatically controls the opening of the steam valve 13 and the vacuum pump 22, and the steam enters the jacket. Under stirring, the crystal is fully heated, and the vacuum system continuously collects the solvent volatilized in the crystal and cools it through the first cooler 20. The cooled liquid enters the solvent recovery tank 21 and is reused.

[0030] Furthermore, in this embodiment, the gas outlet of the solvent recovery tank 21 is also connected to the second cooler 23, and the liquid outlet of the second cooler 23 is connected to the solvent recovery tank 21. The gas not condensed by the first cooler 20 enters the second cooler 23 to be further cooled, and the cooled liquid enters the solvent recovery tank 21 again, and finally the non-condensable tail gas is sent to the tail gas treatment device.

[0031] Furthermore, in this embodiment, a stirring device 24 is provided in the dissolving tank 1 and the mother liquid tank 3 .

[0032] Furthermore, in this embodiment, the crystallization filter dryer 2 is further provided with a discharge port 25 above the filter screen 6, and a discharge pipe 26 is provided at the discharge port 25, and a discharge valve 27 is provided on the discharge pipe 26. After drying, the discharge valve 27 is opened, and the stirring is reversed to promote the discharge of the material.

[0033] The process of producing stevioside using the above device is as follows:

[0034] The feed liquid in the dissolving tank 1 (the dissolving liquid of the crude mixed glycoside) enters the crystallization filter dryer 2 through the feed pump, the ice water valve 4 is opened, ice water is introduced into the jacket of the crystallization filter dryer 2, stirring is started, and the material enters the cooling crystallization link. After the temperature sensor 15 detects that the feed liquid in the crystallization filter dryer 2 is cooled to room temperature, the crystallization is completed, the ice water valve 4 is closed, the nitrogen valve 17 and the mother liquor valve 12 are opened, and under the pressure of nitrogen, the mother liquor in the feed liquid is pressed into the mother liquor tank 3 through the filter screen 6, and the crystals are intercepted by the filter screen 6. At this time, the crystals are continuously and evenly coated on the filter screen 6 by stirring to prevent the nitrogen from short-circuiting, thereby better squeezing out all the mother liquor. When the weighing sensor 19 detects that there is no significant change in the weight of the mother liquid tank 3, it means that there is no more large amount of mother liquid discharged from the crystallization filter dryer 2. The steam valve 13 and the vacuum pump 22 are opened to enter the drying stage. Steam enters the jacket of the crystallization filter dryer 2. The material is fully heated by stirring. The vacuum system continuously collects the solvent volatilized in the crystal and cools it down through the first cooler 20 and the second cooler 23. Finally, the non-condensable tail gas is sent to the tail gas treatment device, and the cooled solvent is reused. After the drying is completed, the stirring is reversed, the discharge valve is opened, and the material is transported out and enters the packaging system.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-in-one stevioside production device, characterized in that: It comprises a dissolving tank, a crystallization filtering and drying three-in-one system and a mother liquid tank which are connected; the crystallization filtering and drying three-in-one system comprises a crystallization filtering and drying machine, a filtering mechanism arranged in the crystallization filtering and drying machine, and a lifting mechanism, a drying mechanism and a crystallization mechanism connected to the crystallization filtering and drying machine; the crystallization mechanism comprises an ice water pipeline connected to the jacket of the crystallization filtering and drying machine through an ice water valve and a pipeline; the filtering mechanism comprises a filter screen arranged at the bottom of the crystallization filtering and drying machine and a liftable stirring rod arranged above the filter screen, and the liftable stirring rod is connected to the reduction motor through a lifting shaft; the lifting mechanism comprises a hydraulic cylinder arranged at the top of the crystallization filtering and drying machine, and the top end of the piston rod of the hydraulic cylinder is fixedly connected to a support frame, and the reduction motor is arranged on the support frame; the drying mechanism comprises a steam pipeline connected to the jacket of the crystallization filtering and drying machine through a steam valve and a pipeline; the mother liquid port at the bottom of the crystallization filtering and drying machine is connected to the mother liquid tank through a mother liquid valve and a pipeline.

2. A stevioside three-in-one production device according to claim 1, characterized in that: The dissolving tank is connected with the crystallization filter dryer through a pipeline, a valve and a feed pump.

3. The stevioside three-in-one production device according to claim 1, characterized in that: A temperature sensor is arranged inside the crystallization filter dryer, and the temperature sensor is interlocked with the ice water valve.

4. A three-in-one stevioside production device according to claim 3, characterized in that: The crystallization filter dryer is connected to a nitrogen backflush tank, and the nitrogen backflush tank is connected to a nitrogen pipeline via a nitrogen valve. The nitrogen valve and the mother liquor valve are interlocked with a temperature sensor.

5. The three-in-one stevioside production device according to claim 1, characterized in that: The mother liquid tank is provided with a weighing sensor, and the weighing sensor is interlocked with the steam valve.

6. The stevioside three-in-one production device according to claim 5, characterized in that: The air outlet at the top of the crystallization filter dryer is sequentially connected to a first cooler, a solvent recovery tank, and a vacuum pump, and the vacuum pump is interlocked with a weighing sensor.

7. The three-in-one stevioside production device according to claim 6, characterized in that: The gas outlet of the solvent recovery tank is also connected to the second cooler, and the liquid outlet of the second cooler is connected to the solvent recovery tank.

8. The stevioside three-in-one production device according to claim 1, characterized in that: The dissolving tank and the mother liquid tank are provided with stirring devices.

9. The three-in-one stevioside production device according to claim 1, characterized in that: The crystallization filter dryer is also provided with a discharge port above the filter screen, a discharge pipe is provided at the discharge port, and a discharge valve is provided on the discharge pipe.

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