Purification device of rebaudioside B

Abstract

The utility model discloses a purification device of rebaudioside B. The purification device comprises a dissolving tank, an electrodialyzer, a reverse osmosis membrane component, a settling tank, a plate and frame filter, a first drying tank and a first product tank, and the electrodialyzer is also sequentially communicated with a nanofiltration membrane assembly, a second drying tank and a second product tank. The device takes the stevia mother liquor sugar as a raw material, rebaudioside B and other stevioside except the rebaudioside B in the stevia mother liquor sugar are recovered through electrodialysis, membrane concentration and acidification treatment, and the utilization rate and the economic value of the stevia mother liquor sugar are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stevioside production, in particular to a rebaudioside B purification device. Background Art

[0002] Rebaudioside B is an active ingredient isolated from stevia. It is 150 times sweeter than sucrose. In addition to being a sweetener, studies have found that rebaudioside B also has the effects of regulating blood sugar and blood lipids, relieving constipation, and promoting metabolism. It can be used as an auxiliary treatment for diseases such as diabetes and hyperlipidemia. It is a steviol glycoside compound with great application potential.

[0003] Currently, the production of rebaudioside A or other stevia sugars produces a portion of stevia mother liquor. This mother liquor has a low total glycoside content, a poor taste, and low economic value. Direct sales of this mother liquor do not generate significant returns for the company. Rebaudioside B is significantly enriched in this mother liquor, so recovering rebaudioside B from this mother liquor is a challenge for those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in view of the deficiencies in the existing technology, a device for recovering rebaudioside B is provided. The device uses stevia mother liquor sugar as raw material, and recovers rebaudioside B and other steviol glycosides except rebaudioside B in stevia mother liquor sugar through electrodialysis, membrane concentration and acid precipitation treatment, thereby greatly improving the utilization rate and economic value of stevia mother liquor sugar.

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

[0006] A rebaudioside B purification device comprises a dissolution tank, an electrodialyzer, a reverse osmosis membrane assembly, a precipitation tank, a plate and frame filter, a first drying tank, and a first product tank; the electrodialyzer is also sequentially connected to a nanofiltration membrane assembly, a second drying tank, and a second product tank.

[0007] Preferably, the dissolving tank is provided with a mother liquor sugar addition port, and the dissolving tank is also connected to a pure water storage tank and an alkali solution storage tank.

[0008] Preferably, a first pH sensor is provided in the dissolving tank, a first electric valve is provided on the connecting pipe between the dissolving tank and the alkali solution storage tank, and the first pH sensor and the first electric valve are interlocked.

[0009] Preferably, the permeate outlet of the reverse osmosis membrane assembly is connected to the dissolution tank.

[0010] Preferably, the precipitation tank is also connected to an acid liquid storage tank.

[0011] Preferably, a second pH sensor is provided in the precipitation tank, a second electric valve is provided on the connecting pipe between the precipitation tank and the acid storage tank, and the second pH sensor and the second electric valve are interlocked.

[0012] Preferably, the precipitation tank is further provided with a jacket, and the jacket is provided with a heat exchange medium inlet and a heat exchange medium outlet, respectively.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] The utility model provides a rebaudioside B purification device, comprising a dissolution tank, an electrodialyzer, a reverse osmosis membrane assembly, a precipitation tank, a plate and frame filter, a first drying tank, and a first product tank; the electrodialyzer is also sequentially connected to a nanofiltration membrane assembly, a second drying tank, and a second product tank. The dissolution tank is provided with a mother liquor sugar addition port and is also connected to a pure water storage tank. This device uses stevia mother liquor sugar as raw material and utilizes a combination of electrodialysis, acid precipitation, and membrane concentration to recover rebaudioside B and other steviol glycosides from the mother liquor sugar, thereby increasing the economic value of the mother liquor sugar.

[0015] In this device, a dissolving tank is connected to an alkali solution storage tank. A first pH sensor is installed in the dissolving tank, and a first electric valve is installed on the connecting pipe between the dissolving tank and the alkali solution storage tank. The first pH sensor and the first electric valve are interlocked. This arrangement can accurately adjust the pH of the mother sugar solution.

[0016] In this device, the permeate outlet of the reverse osmosis membrane assembly is connected to the dissolution tank. The permeate from the reverse osmosis process is reused in the mother liquor sugar dissolution process, achieving waste liquid reuse and further reducing energy consumption.

[0017] In this device, the precipitation tank is also connected to an acid storage tank. A second pH sensor is installed in the precipitation tank, and a second electric valve is installed on the connecting pipe between the precipitation tank and the acid storage tank. The second pH sensor and the second electric valve are interlocked. This arrangement allows for precise control of the pH of the solution in the precipitation tank, facilitating the precipitation of rebaudioside B.

[0018] The precipitation tank of the device is also provided with a jacket, on which a heat exchange medium inlet and a heat exchange medium outlet are respectively provided. The above arrangement can effectively control the temperature of the precipitation process and facilitate the precipitation of rebaudioside B. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0021] In the figure, 1. dissolution tank; 2. electrodialyzer; 3. reverse osmosis membrane assembly; 4. sedimentation tank; 5. plate and frame filter; 6. first drying tank; 7. first product tank; 8. nanofiltration membrane assembly; 9. second drying tank; 10. second product tank; 11. mother liquor sugar addition port; 12. pure water storage tank; 13. alkali solution storage tank; 14. first pH sensor; 15. first electric valve; 16. acid storage tank; 17. second pH sensor; 18. second electric valve; 19. jacket; 20. heat exchange medium inlet; 21. heat exchange medium outlet. DETAILED DESCRIPTION

[0022] 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 them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Example

[0024] like Figure 1 As shown, a purification device for rebaudioside B includes a dissolution tank 1, an electrodialyzer 2, a reverse osmosis membrane assembly 3, a precipitation tank 4, a plate and frame filter 5, a first drying tank 6, and a first product tank 7; the electrodialyzer 2 is also connected to a nanofiltration membrane assembly 8, a second drying tank 9, and a second product tank 10 in sequence.

[0025] In this embodiment, the dissolving tank 1 is provided with a mother sugar addition port 11, and is also connected to a pure water storage tank 12 and an alkali liquid storage tank 13. During dissolution, the mother sugar and pure water are added to the dissolving tank 1 and stirred to dissolve. Then, alkali liquid is added to the dissolving tank 1 through the alkali liquid storage tank 13 to adjust the pH, thereby producing mother sugar, which is then separated using the electrodialyzer 2.

[0026] In this embodiment, a first pH sensor 14 is provided within the dissolution tank 1, and a first electric valve 15 is provided on the connecting pipe between the dissolution tank 1 and the alkali solution storage tank 13. The first pH sensor 14 and the first electric valve 15 are interlocked. The first pH sensor 14 can monitor the pH of the mother sugar solution in real time. When the pH reaches a set value, the first pH sensor 14 transmits a signal to an external control system (not shown), which automatically closes the first electric valve 15, achieving precise control of the pH of the mother sugar solution.

[0027] In this embodiment, the permeate outlet of the reverse osmosis membrane assembly 3 is connected to the dissolution tank 1, and the permeate in the reverse osmosis concentration process is reused in the mother liquor sugar dissolution process, thereby realizing the reuse of waste liquid.

[0028] In this embodiment, the precipitation tank 4 is also connected to an acid storage tank 16. A second pH sensor 17 is installed within the precipitation tank 4. A second electric valve 18 is installed on the connecting pipe between the precipitation tank 4 and the acid storage tank 16. The second pH sensor 17 and the second electric valve 18 are interlocked. The acid is used to adjust the pH of the retentate in the precipitation tank 4. The second pH sensor 17 monitors the pH of the retentate in real time. If the pH reaches a set value, it transmits a signal to an external control system, which closes the second electric valve 18 to achieve precise pH control.

[0029] In this embodiment, the precipitation tank 4 is further provided with a jacket 19, which is provided with a heat exchange medium inlet 20 and a heat exchange medium outlet 21. By introducing a heat exchange medium into the jacket 19 of the precipitation tank 4, the precipitation temperature is maintained and the precipitation efficiency of rebaudioside B is improved.

[0030] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rebaudioside B purification device, characterized in that: It includes a dissolution tank, an electrodialyzer, a reverse osmosis membrane assembly, a precipitation tank, a plate and frame filter, a first drying tank, and a first product tank; the electrodialyzer is also connected to a nanofiltration membrane assembly, a second drying tank, and a second product tank in sequence.

2. A rebaudioside B purification device according to claim 1, characterized in that: The dissolving tank is provided with a mother liquor sugar adding port, and the dissolving tank is also connected with a pure water storage tank and an alkali solution storage tank.

3. A rebaudioside B purification device according to claim 2, characterized in that: A first pH sensor is provided in the dissolving tank, and a first electric valve is provided on the connecting pipe between the dissolving tank and the alkali solution storage tank. The first pH sensor and the first electric valve are interlocked.

4. A rebaudioside B purification device according to claim 1, characterized in that: The permeate outlet of the reverse osmosis membrane assembly is communicated with the dissolution tank.

5. The rebaudioside B purification device according to claim 1, wherein: The precipitation tank is also connected to an acid liquid storage tank.

6. The rebaudioside B purification device according to claim 5, characterized in that: A second pH sensor is provided in the precipitation tank, a second electric valve is provided on the connecting pipe between the precipitation tank and the acid storage tank, and the second pH sensor and the second electric valve are interlocked.

7. The rebaudioside B purification device according to claim 1, wherein: The precipitation tank is further provided with a jacket, and a heat exchange medium inlet and a heat exchange medium outlet are respectively provided on the jacket.

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