Device for recovering rebaudioside M from stevioside crystallization mother liquor

Abstract

The utility model discloses a device for recovering rebaudioside M from stevioside crystallization mother liquor, and relates to the technical field of stevioside production. Inlets of a first macroporous adsorption resin column and a second macroporous adsorption resin column are respectively communicated with a stevioside mother liquor tank and an ethanol solution tank; outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively communicated with a desorption solution tank, an outlet of the desorption solution tank is communicated with a first concentration tank, an outlet of the first concentration tank is communicated with a first crystallization tank, an outlet of the first crystallization tank is communicated with a first filter, and the first filter is communicated with a rebaudioside M tank. The rebaudioside M is recycled, so that the waste of raw materials is reduced, the pollution to the environment is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stevioside production, in particular to a device for recovering rebaudioside M from stevioside crystallization mother liquor. Background Art

[0002] Chinese patent CN107404919A discloses a sweetener composition, in which a certain proportion of RD and RM are added to RA as active ingredients. The final sweetness quality is close to that of an excellent natural sweetener of edible sugar. Chinese patent CN109219355A discloses a rebaudioside M improved sweetener, which makes the sweetener property closer to the sweetness of sucrose.

[0003] In summary, the use of rebaudioside D and rebaudioside M as sweetness modifiers has been widely verified. However, the components of the biological transformation stevioside crystallization mother liquor are complex, and most stevioside manufacturers in my country only use macroporous adsorption resins to preliminarily extract STV and RA. However, the adsorbed stevioside mother liquor sugar (mother liquor sugar after extracting STV and RA) contains rebaudioside M. At present, there is no good treatment method, and the mother liquor sugar is often directly discharged as waste. This causes a huge waste of resources and also causes environmental pollution. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a device for recovering rebaudioside M from stevioside crystallization mother liquor is provided to recover rebaudioside M, thereby reducing the waste of raw materials and the pollution to the environment.

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

[0006] A device for recovering rebaudioside M from a stevioside crystallization mother liquor comprises a first macroporous adsorption resin column and a second macroporous adsorption resin column connected in series, wherein the inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a stevioside mother liquor tank and an ethanol solution tank through pipelines;

[0007] The outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to the analysis liquid tank through pipelines, the outlet of the analysis liquid tank is connected to the first concentration tank through a pipeline, the outlet of the first concentration tank is connected to the first crystallization tank through a pipeline, the outlet of the first crystallization tank is connected to the first filter through a pipeline, the liquid phase outlet of the first filter is connected to the first mother liquid tank, and the solid phase outlet of the first filter is connected to the rebaudioside M tank.

[0008] As an improved technical solution, the inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are connected to purified water tanks through pipes, and the outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are connected to first flushing water tanks through pipes.

[0009] As an improved technical solution, the outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a second flushing water tank through a pipeline, and the outlet of the second flushing water tank is connected to the purified water tank through a pipeline.

[0010] As an improved technical solution, the inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to an alkali solution tank through pipelines.

[0011] As an improved technical solution, the outlet of the first mother liquid tank is connected to the second concentration tank through a pipeline, the outlet of the second concentration tank is connected to the second crystallization tank through a pipeline, the inlet of the second crystallization tank is connected to the alcohol liquid tank through a pipeline, the outlet of the second crystallization tank is connected to the second filter through a pipeline, the liquid phase outlet of the second filter is connected to the second mother liquid tank, and the solid phase outlet of the second filter is connected to the rebaudioside D tank.

[0012] As an improved technical solution, the outlet of the Rebaudioside D tank is connected to a first dryer, and the outlet of the first dryer is connected to a Rebaudioside D finished product tank.

[0013] As a preferred technical solution, the outlet of the second mother liquid tank is connected to the first crystallization tank through a pipeline.

[0014] As a preferred technical solution, the outlet of the Rebaudioside M tank is connected to a second dryer, and the outlet of the second dryer is connected to a Rebaudioside M finished product tank.

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

[0016] The utility model discloses a device for recovering rebaudioside M from stevioside crystallization mother liquor, comprising a first macroporous adsorption resin column and a second macroporous adsorption resin column which are connected in series, wherein the inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a stevioside mother liquor tank and an ethanol solution tank through pipelines; the outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a decomposition liquid tank through pipelines, the outlets of the decomposition liquid tank are connected to a first concentration tank through pipelines, the outlet of the first concentration tank is connected to a first crystallization tank through pipelines, the outlet of the first crystallization tank is connected to a first filter through pipelines, the liquid phase outlet of the first filter is connected to a first mother liquor tank, and the solid phase outlet of the first filter is connected to a rebaudioside M tank. The stevioside mother liquor after bioconversion enters the first macroporous adsorption resin column and the second macroporous adsorption resin column connected in series. When the effluent of the first macroporous adsorption resin column is sweet, the feeding is stopped, and then an ethanol solution is introduced to analyze the first macroporous adsorption resin column. The obtained analytical solution enters the first concentration tank and is concentrated until a mist appears. The concentration is stopped, and the feed liquid is transferred to the first crystallization tank, and stirring and cooling are started to crystallize and filter to obtain rebaudioside M crystals. One of the first macroporous adsorption resin column and the second macroporous adsorption resin column is an adsorption column, and the other is a recovery column. When the second batch of feeding is carried out, the recovery column of the previous batch is used as the adsorption column, and the adsorption column of the previous batch is used as the recovery column for series feeding and replacement. By recycling rebaudioside M again, the waste of raw materials is reduced, the pollution to the environment is reduced, and the economic benefits are improved.

[0017] The inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column of the utility model are respectively connected to a purified water tank through pipelines, and the outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a first flushing water tank through pipelines. The resin column after adsorption is flushed with purified water to remove most of the impurities, thereby improving the purity of the obtained rebaudioside M product. In addition, the flushing water can be combined with the permeate after the mother liquor is adsorbed for protein production.

[0018] The outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to the second flushing water tank through pipelines, and the outlet of the second flushing water tank is connected to the purified water tank through a pipeline. The resin column after analysis is flushed with purified water, and the relatively clean flushing water can be used to flush the resin column after adsorption of the stevioside mother liquor after biological conversion, which saves water resources, reduces production costs, and saves the trouble of sewage treatment, which is environmentally friendly.

[0019] The inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to an alkali solution tank through pipelines. Impurities such as pigments and proteins adsorbed on the first macroporous adsorption resin column and the second macroporous adsorption resin column are removed by alkali washing, thereby improving the purity of the product.

[0020] The outlet of the first mother liquid tank is connected to the second concentration tank through a pipeline, the outlet of the second concentration tank is connected to the second crystallization tank through a pipeline, the inlet of the second crystallization tank is connected to the alcohol liquid tank through a pipeline, the outlet of the second crystallization tank is connected to the second filter through a pipeline, the liquid phase outlet of the second filter is connected to the second mother liquid tank, and the solid phase outlet of the second filter is connected to the rebaudioside D tank. The mother liquor after the crystallization of rebaudioside M is re-concentrated until it appears misty, and then transferred to the second concentration tank, and methanol or ethanol solution is added to the second concentration tank for dissolution, and then cooled again for crystallization and filtration to obtain crystals of rebaudioside D, and the stevioside mother liquor after bioconversion is fully recovered, thereby improving the economic value of the product.

[0021] The outlet of the rebaudioside D tank is connected to a first dryer, the outlet of the first dryer is connected to a rebaudioside D finished product tank, the outlet of the rebaudioside M tank is connected to a second dryer, the outlet of the second dryer is connected to a rebaudioside M finished product tank. By drying the filtered rebaudioside D crystals and rebaudioside M crystals respectively, a rebaudioside D finished product and a rebaudioside M finished product with higher purity are obtained, thereby improving the quality of the products.

[0022] The outlet of the second mother liquid tank is connected to the first crystallization tank through a pipeline. The mother liquid after the crystallization of rebaudioside D is recycled again, which improves the yield of the product and improves the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0025] Wherein: 1. the first macroporous adsorption resin column; 2. the second macroporous adsorption resin column; 3. the stevioside mother liquor tank; 4. the ethanol solution tank; 5. the analytical liquid tank; 6. the first concentration tank; 7. the first crystallization tank; 8. the first filter; 9. the first mother liquor tank; 10. the rebaudioside M tank; 11. the purified water tank; 12. the first flushing water tank; 13. the second flushing water tank; 14. the alkali liquid tank; 15. the second concentration tank; 16. the alcohol liquid tank; 17. the second crystallization tank; 18. the second filter; 19. the second mother liquor tank; 20. the rebaudioside D tank; 21. the first dryer; 22. the rebaudioside D finished product tank; 23. the second dryer; 24. the rebaudioside M finished product tank. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1As shown, a device for recovering rebaudioside M from stevioside crystallization mother liquor comprises a first macroporous adsorption resin column 1 and a second macroporous adsorption resin column 2 connected in series, wherein the inlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are respectively connected to a stevioside mother liquor tank 3 and an ethanol solution tank 4 through pipelines; the outlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are respectively connected to a decomposition liquid tank 5 through pipelines, the outlet of the decomposition liquid tank 5 is connected to a first concentration tank 6 through a pipeline, the outlet of the first concentration tank 6 is connected to a first crystallization tank 7 through a pipeline, the outlet of the first crystallization tank 7 is connected to a first filter 8 through a pipeline, the liquid phase outlet of the first filter 8 is connected to a first mother liquor tank 9, and the solid phase outlet of the first filter 8 is connected to a rebaudioside M tank 10. The stevioside mother liquor after bioconversion enters the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 connected in series. When the effluent of the first macroporous adsorption resin column 1 is sweet, the feeding is stopped, and then the ethanol solution is introduced to analyze the first macroporous adsorption resin column 1. The obtained analytical solution enters the first concentration tank 6 and is concentrated until it appears misty. The concentration is stopped, and the feed liquid is transferred to the first crystallization tank 7. Stirring and cooling are started to crystallize and filter to obtain rebaudioside M crystals. One of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 is an adsorption column, and the other is a recovery column. When the second batch of feeding is carried out, the recovery column of the previous batch is used as the adsorption column, and the adsorption column of the previous batch is used as the recovery column for series feeding and replacement. By recycling rebaudioside M again, the waste of raw materials is reduced, the pollution to the environment is reduced, and the economic benefits are improved.

[0028] The inlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 of the utility model are respectively connected to a purified water tank 11 through pipelines, and the outlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are respectively connected to a first flushing water tank 12 through pipelines. The resin column after adsorption is flushed with purified water to remove most of the impurities, thereby improving the purity of the obtained rebaudioside M product. In addition, the flushing water can be combined with the permeate after the mother liquor is adsorbed for protein production.

[0029] The outlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are respectively connected to the second flushing water tank 13 through pipes, and the outlet of the second flushing water tank 13 is connected to the purified water tank 11 through a pipe. The resin column after analysis is flushed with purified water, and the relatively clean flushing water can be used to flush the resin column after adsorption of the stevioside mother liquor after biological conversion, which saves water resources, reduces production costs, and saves the trouble of sewage treatment, which is environmentally friendly.

[0030] The inlets of the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are respectively connected to an alkali liquid tank 14 through pipelines. Impurities such as pigments and proteins adsorbed on the first macroporous adsorption resin column 1 and the second macroporous adsorption resin column 2 are removed by alkali washing, thereby improving the purity of the product.

[0031] The outlet of the first mother liquid tank 9 is connected to the second concentration tank 15 through a pipeline, the outlet of the second concentration tank 15 is connected to the second crystallization tank 17 through a pipeline, the inlet of the second crystallization tank 17 is connected to the alcohol liquid tank 16 through a pipeline, the outlet of the second crystallization tank 17 is connected to the second filter 18 through a pipeline, the liquid phase outlet of the second filter 18 is connected to the second mother liquid tank 19, and the solid phase outlet of the second filter 18 is connected to the rebaudioside D tank 20. The mother liquor after the crystallization of rebaudioside M is re-concentrated until it appears foggy, and then transferred to the second concentration tank 15, and methanol or ethanol solution is added to the second concentration tank 15 for dissolution, and then cooled again for crystallization and filtration to obtain crystals of rebaudioside D, and the stevioside mother liquor after biological conversion is fully recovered, thereby improving the economic value of the product.

[0032] The outlet of the rebaudioside D tank 20 is connected to the first dryer 21, the outlet of the first dryer 21 is connected to the rebaudioside D finished product tank 22, the outlet of the rebaudioside M tank 10 is connected to the second dryer 23, and the outlet of the second dryer 23 is connected to the rebaudioside M finished product tank 24. By drying the filtered rebaudioside D crystals and rebaudioside M crystals respectively, the rebaudioside D finished product and rebaudioside M finished product with higher purity are obtained, thereby improving the quality of the products.

[0033] The outlet of the second mother liquid tank 19 is connected to the first crystallization tank 7 through a pipeline. The mother liquid after the crystallization of rebaudioside D is recycled again, which improves the yield of the product and improves the economic benefit.

[0034] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A device for recovering rebaudioside M from stevioside crystallization mother liquor, characterized in that: It comprises a first macroporous adsorption resin column and a second macroporous adsorption resin column connected in series, wherein the inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a stevioside mother liquid tank and an ethanol solution tank through pipelines; The outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to the analysis liquid tank through pipelines, the outlet of the analysis liquid tank is connected to the first concentration tank through a pipeline, the outlet of the first concentration tank is connected to the first crystallization tank through a pipeline, the outlet of the first crystallization tank is connected to the first filter through a pipeline, the liquid phase outlet of the first filter is connected to the first mother liquid tank, and the solid phase outlet of the first filter is connected to the rebaudioside M tank.

2. The device for recovering rebaudioside M from a stevioside crystallization mother liquor according to claim 1, characterized in that: The inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are connected to a purified water tank through pipelines, and the outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are connected to a first flushing water tank through pipelines.

3. The device for recovering rebaudioside M from a stevioside crystallization mother liquor as claimed in claim 2, characterized in that: The outlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to a second flushing water tank through pipelines, and the outlet of the second flushing water tank is connected to the purified water tank through a pipeline.

4. The device for recovering rebaudioside M from a stevioside crystallization mother liquor according to claim 1, characterized in that: The inlets of the first macroporous adsorption resin column and the second macroporous adsorption resin column are respectively connected to an alkali solution tank through pipelines.

5. The device for recovering rebaudioside M from steviol glycoside crystallization mother liquor according to claim 1, characterized in that: The outlet of the first mother liquid tank is connected to the second concentration tank through a pipeline, the outlet of the second concentration tank is connected to the second crystallization tank through a pipeline, the inlet of the second crystallization tank is connected to the alcohol liquid tank through a pipeline, the outlet of the second crystallization tank is connected to the second filter through a pipeline, the liquid phase outlet of the second filter is connected to the second mother liquid tank, and the solid phase outlet of the second filter is connected to the rebaudioside D tank.

6. The device for recovering rebaudioside M from steviol glycoside crystallization mother liquor according to claim 5, characterized in that: The outlet of the rebaudioside D tank is connected to the first dryer, and the outlet of the first dryer is connected to the rebaudioside D finished product tank.

7. The device for recovering rebaudioside M from steviol glycoside crystallization mother liquor according to claim 5, characterized in that: The outlet of the second mother liquid tank is connected to the first crystallization tank through a pipeline.

8. The device for recovering rebaudioside M from steviol glycoside crystallization mother liquor according to claim 1, characterized in that: The outlet of the Rebaudioside M tank is connected to a second dryer, and the outlet of the second dryer is connected to a Rebaudioside M finished product tank.

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