Glucose mother liquor treatment system
Through nanofiltration and continuous chromatography separation technology in the glucose mother liquor treatment system, the problem of large amount of inorganic acid is solved, efficient deacidification of glucose mother liquor and recycling of resources is achieved, and the economic benefits of glucose production are improved.
Patent Information
- Application Number
- CN202421943368.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-08-12
AI Technical Summary
During the existing glucose mother liquor treatment, the amount of inorganic acid is used and difficult to effectively remove, resulting in a large amount of acid and alkali wastewater generation, affecting economic benefits and resource utilization.
The glucose mother liquor treatment system is adopted, including the first nanofiltration unit, the hydrolysis unit and the continuous chromatography separation unit. Through primary nanofiltration, acid hydrolysis and secondary nanofiltration treatment, the glucose mother liquor is efficiently deacidized and the formation of acid and alkali wastewater is reduced.
It improves the recovery rate of glucose mother liquor, reduces the generation of acid and alkali wastewater, improves the economic benefits of glucose production enterprises, and realizes efficient utilization of resources.
Smart Images
Figure CN223268668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glucose mother liquor processing equipment, in particular to a glucose mother liquor processing system. Background Art
[0002] Industrial production of crystalline glucose typically uses starch (corn, potatoes) as raw material, employing a dual-enzyme hydrolysis sugar-making process. After liquefaction and saccharification, glucose is produced, which is then refined, purified, crystallized, separated, and dried. During the crystallization process, every one million tons of crystallized glucose produces approximately 200,000 tons of glucose mother liquor. This dark, viscous liquid contains 70% to 80% solids and a pH of 4.0 to 4.5. In addition to a large amount of glucose, this mother liquor also contains small amounts of other substances, such as disaccharides and polysaccharides. These substances can severely affect the recrystallization of the glucose components in the mother liquor, or even render the resulting glucose product substandard. Consequently, its utilization is limited, and existing treatment methods, mostly relying on export, have low economic value. Consequently, the development of new glucose mother liquor treatment technologies is urgent.
[0003] Xiong Wangang et al. used membrane separation + continuous hydrolysis technology to purify crystallized glucose mother liquor. The process flow is as follows: Figure 1 As shown in the figure, in this treatment process, first, the crystallized glucose mother liquor treated by membrane separation is separated into a dialysate and a concentrated phase. The concentrated phase contains oligosaccharides, and the main substance of the nanofiltration dialysate is glucose, with a content of about 13% to 15%, which can be further incorporated into production for repeated use after four-effect concentration; and the separated nanofiltration concentrated phase contains about 18% to 20% reducing sugars (2 to 5 sugars, nanofiltration retention rate > 88%), of which the glucose content is 1.5% to 2.0% (the monosaccharide retention rate of nanofiltration is 12%). After hydrolysis treatment, the glucose content can reach 16.1%, the oligosaccharide hydrolysis rate reaches 80%, and the Dx value reaches 96%. In this process, the hydrolysis of oligosaccharides is the key node to ensure the recycling of glucose mother liquor. To this end, the specific process adopted by Xiong Wangang et al. is: add hydrochloric acid to adjust the pH to 2.0-3.0, pump it into a plate heat exchanger and heat it to 100-105°C, and keep the continuous hydrolysis tank warm for 8-15 minutes for hydrolysis. When the glucose content reaches the maximum value, the sample is taken to measure the total sugar, maltose content, DX value, transmittance, and sugar spectrum analysis, and then sent to the decolorization process for reuse. In this process, inorganic acid needs to be added during the hydrolysis of oligosaccharides, but the process does not treat the inorganic acid generated in the process. Therefore, how to effectively remove the inorganic acid in the hydrolyzate and avoid the large-scale generation of acid-base wastewater has become a new technical problem. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a glucose mother liquor treatment system, which reuses the glucose mother liquor through a green and environmentally friendly process, can effectively improve the economic benefits of glucose production enterprises, and avoid the large-scale generation of acid and alkaline wastewater.
[0005] In order to achieve the above technical effects, the present invention adopts the following technical solutions:
[0006] A glucose mother liquor processing system comprises: a first nanofiltration unit, a hydrolysis unit, a continuous chromatographic separation unit and a second acid-resistant nanofiltration unit which are connected in sequence according to the processing steps, wherein the first nanofiltration unit is used to perform a primary nanofiltration treatment on the glucose mother liquor and send the generated concentrated liquid I to the hydrolysis unit, the hydrolysis unit is used to perform acid hydrolysis on the concentrated liquid I and send the generated hydrolyzate to the continuous chromatographic separation unit, the continuous chromatographic separation unit performs deacidification treatment on the hydrolyzate, and the acid generated during the deacidification treatment of the continuous chromatographic separation system is sent to the second acid-resistant nanofiltration unit for secondary nanofiltration treatment.
[0007] Furthermore, the first nanofiltration unit performs a primary nanofiltration treatment on the glucose mother liquor and produces a dialysate I and a concentrated solution I. The dialysate I can be reused and preferably transported to the glucose production process for use; the concentrated solution I is transported to the hydrolysis unit for hydrolysis treatment.
[0008] Preferably, the first nanofiltration unit includes at least a first storage tank and a first nanofiltration separation component. A first circulation loop is formed between the first storage tank and the first nanofiltration separation component. The first nanofiltration separation component is used to perform nanofiltration treatment on the glucose mother liquor and produce dialysate I and concentrated liquid I. The first storage tank is used to store the input glucose mother liquor or the concentrated liquid I produced after the glucose mother liquor is separated by the first nanofiltration separation component. The first circulation loop is set so that the concentrated liquid I can flow back to the first storage tank. The first circulation loop is also provided with a valve, a delivery pump and a heat exchange component.
[0009] Furthermore, the hydrolysis unit comprises at least one hydrolysis tank, which is used for carrying out the hydrolysis reaction and is connected to the continuous chromatography separation unit via a hydrolyzate output pipeline.
[0010] Preferably, the hydrolysis unit further comprises at least one second storage tank, which is used to store the concentrated liquid I output by the first nanofiltration unit.
[0011] Furthermore, the continuous chromatographic separation unit includes a hydrolyzate feeding zone, a secondary separation zone, a top water zone, an acid washing zone, and a sugar washing zone, wherein:
[0012] The sugar washing area includes 2 to 3 resin columns connected in series, and the sugar washing area processes to produce a sugar-containing solution I;
[0013] The hydrolyzate feed zone is connected to the hydrolyzate output pipeline, and the hydrolyzate feed zone includes at least 2 to 3 resin columns connected in series. The hydrolyzate feed zone is used to process the acid-containing hydrolyzate input from the hydrolysis unit and produce a sugar-containing solution II;
[0014] The secondary separation zone includes at least 2 to 3 resin columns connected in series. The sugar-containing solution I and the sugar-containing solution II are mixed and then input into the secondary separation zone for treatment. The sugar solution A separated in the secondary separation zone can be reused.
[0015] The top water zone includes at least one resin column, and the effluent from the secondary separation is fed into the top water zone through a reverse column feed, and the recycled water generated in the top water zone is output via a recycled water pipeline;
[0016] The acid washing area includes at least 3 to 5 resin columns connected in series. The output end of the recycled water pipeline is directly or indirectly connected to the input end of the acid washing area. The acid liquid A produced at the output end of the acid washing area is transported to the second acid-resistant nanofiltration unit for treatment.
[0017] Preferably, the top water zone includes a resin column and a replacement column, and the resin column and the replacement column can be used alternately.
[0018] Preferably, the continuous chromatographic separation unit further comprises at least one third pure water storage tank, and the third pure water storage tank is arranged before the acid washing zone.
[0019] Furthermore, the second acid-resistant nanofiltration unit includes at least a fourth storage tank and a second nanofiltration separation component, and a second circulation loop is formed between the fourth storage tank and the second nanofiltration separation component. The second circulation loop is also provided with a valve, a delivery pump and a heat exchange component.
[0020] Preferably, the second nanofiltration separation component is used to separate the acid solution produced by the continuous chromatography separation unit and produce concentrated solution II and dialysate II. The concentrated solution II is transported to the hydrolysis unit for reuse, and the dialysate II is transported to the continuous chromatography separation unit for reuse.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] The utility model provides a glucose mother liquor processing system, comprising a first nanofiltration unit, a hydrolysis unit, a continuous chromatography separation unit, and a second acid-resistant nanofiltration unit, which are sequentially connected according to a processing step. During the processing of the glucose mother liquor, the first nanofiltration unit is used to perform a primary nanofiltration treatment on the glucose mother liquor and to feed the generated concentrated liquid I into the hydrolysis unit. The hydrolysis unit is used to perform acid hydrolysis on the concentrated liquid I and to feed the generated hydrolyzed liquid into the continuous chromatography separation unit. The continuous chromatography separation unit performs a deacidification treatment on the hydrolyzed liquid. The acid generated during the deacidification treatment of the continuous chromatography separation system is then fed into the second acid-resistant nanofiltration unit for a secondary nanofiltration treatment. The processing system has a reasonable process, solves the problems of large acid and alkali usage and high water consumption in the existing glucose mother liquor processing process, and can greatly improve the recovery rate of glucose. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A process flow chart of the references cited in the background technology of this utility model;
[0024] Figure 2 A process flow chart of a glucose mother liquor processing system provided by the utility model;
[0025] Figure 3 This is a schematic diagram of the overall structure of a glucose mother liquor processing system provided by the utility model;
[0026] The accompanying drawings are marked as: 11, first storage tank, 12, first nanofiltration separation component, 13, first circulation loop, 10a, valve, 10b, transfer pump, 10c, heat exchange component, 21, second storage tank, 22, hydrolysis tank, 221, hydrolyzate output pipeline, 31, third pure water storage tank, 32, hydrolyzate feed area, 33, secondary separation area, 34, top water area, 341, replacement column, 35, acid washing area, 36, sugar washing area, 41, fourth storage tank, 42, second circulation loop, 43, second nanofiltration separation component. DETAILED DESCRIPTION
[0027] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.
[0028] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "x direction", "y direction", "z direction", etc., indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing orientation or positional relationship in this utility model are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the drawings and according to specific circumstances.
[0029] See also Figure 2 The utility model provides a glucose mother liquor processing system, comprising: a first nanofiltration unit, a hydrolysis unit, a continuous chromatography separation unit and a second acid-resistant nanofiltration unit connected in sequence according to the processing steps. During the processing of the glucose mother liquor, the first nanofiltration unit is used to perform a primary nanofiltration treatment on the glucose mother liquor and send the generated concentrated liquid I to the hydrolysis unit. The hydrolysis unit is used to perform acid hydrolysis on the concentrated liquid I and send the generated hydrolyzate to the continuous chromatography separation unit. The continuous chromatography separation unit performs deacidification treatment on the hydrolyzate. The acid generated in the deacidification treatment process of the continuous chromatography separation system is sent to the second acid-resistant nanofiltration unit for secondary nanofiltration treatment.
[0030] See also Figure 3 In this embodiment, the first nanofiltration unit performs a primary nanofiltration treatment on the glucose mother liquor and produces a dialysate I and a concentrated solution I. The dialysate I can be reused, and the concentrated solution I is transported to the hydrolysis unit for hydrolysis treatment. Specifically, the first nanofiltration unit includes a first storage tank 11 and a first nanofiltration separation component 12. The first nanofiltration separation component 12 separates the glucose mother liquor using a nanofiltration membrane to produce a dialysate I and a concentrated solution I. The dialysate can be transported to the glucose production process for reuse, and the first storage tank 11 can be used to store the glucose mother liquor or the concentrated solution I obtained by separating the glucose mother liquor through the nanofiltration membrane. In order to achieve the reflux of the concentrated liquid I, a first circulation loop 13 is formed between the first storage tank 11 and the first nanofiltration separation component 12. The first circulation loop 13 is provided with a valve 10a, a delivery pump 10b and a heat exchange component 10c. The first circulation loop 13 is used to allow the generated concentrated liquid I to reflux to the first storage tank 11, and the concentrated liquid I refluxed to the first storage tank 11 is further transported to the next process, that is, the hydrolysis unit for treatment.
[0031] In this embodiment, the hydrolysis unit includes a second storage tank 21 and a hydrolysis tank 22 located downstream of the second storage tank 21. The second storage tank 21 is used to store the concentrated solution I output by the first nanofiltration unit. The concentrated solution I can enter the hydrolysis tank 22 from the second storage tank 21 and react with the inorganic acid added to the hydrolysis tank 22. The hydrolysis tank 22 is connected to the continuous chromatography separation unit via a hydrolyzate output pipe 221. Since the polysaccharide is hydrolyzed to glucose in the hydrolysis tank 22 and a large amount of inorganic acid remains in the solution system, in order to efficiently and greenly separate the glucose and inorganic acid, the hydrolyzate is transported to the continuous chromatography separation unit via the hydrolyzate output pipe 221 for sugar-acid separation.
[0032] In order to achieve sugar and acid separation in the hydrolyzate, the continuous chromatographic separation unit includes a third pure water storage tank 31, a hydrolyzate feed zone 32, a secondary separation zone 33, a top water zone 34, an acid washing zone 35, and a sugar washing zone 36. The third pure water storage tank 31 stores pure water, and the downstream of the third pure water storage tank 31 is sequentially provided with an acid washing zone 35, a sugar washing zone 36, a hydrolyzate feed zone 32, a secondary separation zone 33, and a top water zone 34 in series. Specifically, the connection method is as follows:
[0033] The third pure water storage tank 31 is connected to the acid washing area 35 through a recycled water pipeline to supply recycled water to the acid washing area 35. The acid washing area 35 includes 4 resin columns connected in series to separate the inorganic acid in the solution to be treated. The acid solution A produced at the output end of the acid washing area 35 is transported to the second acid-resistant nanofiltration unit for treatment; the sugar washing area 36 includes 2 resin columns connected in series. The sugar-containing solution I is produced after treatment in the sugar washing area 36. The hydrolyzed liquid feeding area 32 is connected to the hydrolyzed liquid output pipeline 221. The material zone 32 includes two resin columns connected in series. The hydrolyzate feed zone 32 is used to treat the acid-containing hydrolyzate input from the hydrolysis unit and produce a sugar-containing liquid II. The secondary separation zone 33 includes two resin columns connected in series. The sugar-containing liquid I and the sugar-containing liquid II are mixed and input into the secondary separation zone 33 for secondary treatment. The sugar liquid A separated in the secondary separation zone 33 can be reused and is preferably transported to the first storage tank 11; and the effluent of the secondary separation zone 33 further enters the top water zone 34.
[0034] The top water zone 34 includes at least one resin column. The liquid flowing out of the secondary separation zone 33 is input into the top water zone 34 through a reverse column. The recycled water generated by the top water zone 34 is transported to the third pure water storage tank 31 via a recycled water pipeline. In this process, the recycling of pure water is realized. After the recycled water enters the recycled water pipeline, it can be further sent back to each chromatographic column of the continuous chromatographic separation unit. This process not only avoids the large-scale use of alkali for neutralization, but also effectively saves water resources.
[0035] In this embodiment, the top water area 34 is further equipped with a replacement column 341 .
[0036] In this embodiment, in order to process the acid liquid separated by the continuous chromatography separation unit, the second acid-resistant nanofiltration unit includes a fourth storage tank 41 and a second nanofiltration separation component 43. The fourth storage tank 41 is used to store the acid liquid. A second circulation loop 42 is formed between the fourth storage tank 41 and the second nanofiltration separation component 43. When the acid liquid flows in the second circulation loop 42, the acid liquid is processed. The second nanofiltration separation component 43 should use an acid-resistant nanofiltration membrane, and the second circulation loop 42 is also provided with a valve 10a, a delivery pump 10b and a heat exchange component 10c. During the treatment process, the second nanofiltration separation component 43 is used to separate the acid liquid produced by the continuous chromatography separation unit and produce a concentrated liquid II and a dialysate II. The concentrated liquid II is transported to the hydrolysis unit for reuse, and the dialysate II is transported to the third pure water storage tank 31 for reuse, so as to maximize the conservation of water resources.
[0037] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural components not described in detail in the present invention are well-known technologies. For example, the working principle and specific structure of the continuous chromatography separation unit used in the present technical solution will not be described in detail here.
Claims
1. A glucose mother liquor processing system, characterized in that: include: A first nanofiltration unit, a hydrolysis unit, a continuous chromatography separation unit and a second acid-resistant nanofiltration unit are connected in sequence according to the treatment process, wherein the first nanofiltration unit is used to perform a primary nanofiltration treatment on the glucose mother liquor and send the generated concentrated liquid I to the hydrolysis unit, the hydrolysis unit is used to perform acid hydrolysis on the concentrated liquid I and send the generated hydrolyzate to the continuous chromatography separation unit, the continuous chromatography separation unit performs deacidification treatment on the hydrolyzate, and the acid generated by the continuous chromatography separation system during the deacidification treatment is sent to the second acid-resistant nanofiltration unit for secondary nanofiltration treatment.
2. A glucose mother solution processing system according to claim 1, characterized in that: The first nanofiltration unit performs a primary nanofiltration treatment on the glucose mother liquor and produces a dialysate I and a concentrated solution I. The dialysate I can be reused, and the concentrated solution I is further transported to the hydrolysis unit for hydrolysis treatment.
3. A glucose mother solution processing system according to claim 1, characterized in that: The first nanofiltration unit includes at least a first storage tank and a first nanofiltration separation component. A first circulation loop is formed between the first storage tank and the first nanofiltration separation component. The first nanofiltration separation component is used to perform nanofiltration treatment on the glucose mother liquor and produce dialysate I and concentrated liquid I. The first circulation loop is used to supply the concentrated liquid I back to the first storage tank. The first circulation loop is also provided with a valve, a delivery pump and a heat exchange component.
4. A glucose mother solution processing system according to claim 1, characterized in that: The hydrolysis unit comprises at least one hydrolysis tank, which is used for performing hydrolysis reaction and is connected to the continuous chromatography separation unit via a hydrolyzate output pipeline.
5. A glucose mother solution processing system according to claim 4, characterized in that: The hydrolysis unit also includes at least one second storage tank, which is used to store the concentrated liquid I output by the first nanofiltration unit.
6. A glucose mother solution processing system according to claim 1, characterized in that: The continuous chromatographic separation unit includes a hydrolyzate feeding zone, a secondary separation zone, a top water zone, an acid washing zone, and a sugar washing zone, wherein: The sugar washing area includes 2 to 3 resin columns connected in series, and the sugar washing area processes to produce a sugar-containing solution I; The hydrolyzate feed zone is connected to the hydrolyzate output pipeline, and the hydrolyzate feed zone includes at least 2 to 3 resin columns connected in series. The hydrolyzate feed zone is used to process the acid-containing hydrolyzate input from the hydrolysis unit and produce a sugar-containing solution II; The secondary separation zone includes at least 2 to 3 resin columns connected in series. The sugar-containing solution I and the sugar-containing solution II are mixed and then input into the secondary separation zone for treatment. The sugar solution A separated in the secondary separation zone can be reused. The top water zone includes at least one resin column, and the liquid flowing out of the secondary separation zone is input into the top water zone through a reverse feed column, and the recycled water generated in the top water zone is output through a recycled water pipeline; The acid washing area includes at least 3 to 5 resin columns connected in series. The output end of the recycled water pipeline is directly or indirectly connected to the input end of the acid washing area. The acid liquid A produced at the output end of the acid washing area is transported to the second acid-resistant nanofiltration unit for treatment.
7. A glucose mother solution processing system according to claim 6, characterized in that: The top water zone includes a resin column and a replacement column, and the resin column and the replacement column can be used alternately.
8. A glucose mother solution processing system according to claim 6, characterized in that: The continuous chromatographic separation unit further comprises at least one third pure water storage tank, which is arranged before the acid washing zone.
9. A glucose mother solution processing system according to claim 1, characterized in that: The second acid-resistant nanofiltration unit includes at least a fourth storage tank and a second nanofiltration separation component. A second circulation loop is formed between the fourth storage tank and the second nanofiltration separation component. The second circulation loop is also provided with a valve, a delivery pump and a heat exchange component.
10. A glucose mother solution processing system according to claim 9, characterized in that: The second nanofiltration separation component is used to separate the acid solution produced by the continuous chromatography separation unit and produce concentrated solution II and dialysate II. The concentrated solution II is transported to the hydrolysis unit for reuse, and the dialysate II is transported to the continuous chromatography separation unit for reuse.