Forward osmosis concentration system for plant extract
By setting up the concentration equipment, the first liquid tank and the second liquid tank in the positive permeation concentration system of the plant extract, a circulation circuit is formed, which solves the problems of high salt pollution and component loss caused by insufficient precision of the positive permeation membrane, and achieves high-quality and general-quality extraction concentrate production, and saves production energy consumption.
Patent Information
- Application Number
- CN202421500832.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing positive permeability membrane extraction and concentration devices are prone to high salt contamination and loss of active ingredients or aroma components due to insufficient membrane accuracy.
A positive penetration concentration system for plant extracts was designed. Through the setting of the concentration equipment, the first liquid tank and the second liquid tank, two different concentrations of plant extracts were used to form a circulation loop to avoid high salt pollution and component losses, and to achieve high-quality and general-quality extraction concentrate production.
It effectively avoids high salt pollution and component losses caused by insufficient precision of the positive permeability membrane, and can produce high-quality and general-quality plant extraction concentrates at one time, and saves more than 30% of production energy consumption.
Smart Images
Figure CN222724035U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plant extraction, and in particular relates to a forward osmosis concentration system for plant extracts. Background Art
[0002] At present, the concentration of the extracted solution obtained after plants are extracted is generally low, and generally needs to be concentrated before further processing into powder or concentrated liquid products of plant extracts.
[0003] Existing concentration methods are generally divided into equilibrium concentration (including evaporation concentration, freeze concentration, etc.) and non-equilibrium concentration (mainly membrane concentration). Equilibrium concentration generally utilizes the equilibrium relationship between the two phases under the combined action of temperature, air pressure or vapor pressure to complete the concentration process through heat transfer, which will be accompanied by changes in the temperature and vacuum degree of the environment in which the material is located. It will have an impact on the temperature and pressure sensitive components in the product, and may also cause changes in the proportions of components such as aromas with different volatilities, ultimately leading to the loss and change of the effective ingredients and aroma of the product. Non-equilibrium concentration uses a solid semipermeable membrane to separate solutes and solvents, solutes of different sizes, etc. through pressure difference or potential difference. It usually needs to be carried out under higher pressure or voltage, which poses certain safety hazards and has high energy consumption.
[0004] Forward osmosis concentration is a new type of membrane separation technology. It mainly uses the osmotic pressure difference caused by the different concentrations of salt solutes in the solutions on both sides of the membrane to allow the solvent on the low salt concentration side to penetrate through the membrane and achieve solute concentration. If a solute that is easily separated from the solvent is selected to prepare a hypertonic solution, it can also be used for solvent purification. Since this technology does not require changes in the temperature or pressure of the target solution, it is usually carried out at normal pressure or lower pressure, and has broad development prospects. At present, it has a promising prospect and is developing rapidly in the fields of seawater desalination, sewage and garbage treatment, food and drug preparation, etc.
[0005] However, the existing devices using forward osmosis membranes for extraction and concentration have deviations in the permeability accuracy of the forward osmosis membranes themselves. If hypertonic solutions such as saline are directly used as hypertonic solutions for concentrated solution production, this may result in: (1) salt ions in the hypertonic solution entering the hypotonic solution, causing the plant extract to be contaminated; (2) some low-molecular-weight active ingredients, aroma components, etc. in the hypotonic solution are transferred to the hypertonic solution, resulting in changes in the active ingredients or aroma. Utility Model Content
[0006] In view of this, in order to overcome the defects of the prior art, the utility model provides an improved forward osmosis concentration system for plant extracts, which can effectively avoid high salt pollution or loss of low molecular weight effective ingredients and aroma components caused by insufficient precision of forward osmosis membranes.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] The purpose of the utility model is to provide a forward osmosis concentration system for plant extracts, including a concentration device, a first liquid tank, a second liquid tank and a forward osmosis membrane group, wherein a first circulation loop is formed between the forward osmosis membrane group and the first liquid tank, and a second circulation loop is formed between the second liquid tank and the forward osmosis membrane group, the concentration device includes a first inlet, and the second liquid tank includes a second inlet, the first inlet is used to pass a plant extract of a first concentration into the concentration device, and the second inlet is used to pass a plant extract of a second concentration into the second liquid tank, the osmotic pressure of the plant extract of the first concentration is greater than the osmotic pressure of the plant extract of the second concentration, and the first concentration is greater than the second concentration. In some embodiments of the utility model, the concentration device is an MVR falling film vacuum concentration device, which is used to concentrate the ordinary quality plant extract (plant extract of the first concentration) passed therein to Brix (sugar content) ≥ 30%, and then enter the forward osmosis membrane group as a hypertonic solution. High-quality plant extract (plant extract of the second concentration) is passed into the second liquid tank and enters the forward osmosis membrane group as a hypotonic solution.
[0009] According to a preferred implementation aspect of the utility model, a first channel is arranged between the concentrating device and one end of the forward osmosis membrane group, a second channel is arranged between the other end of the forward osmosis membrane group and the top of the first liquid tank, and a third channel is arranged between the bottom of the first liquid tank and the second channel. The first channel, the forward osmosis membrane group, the second channel and the third channel together form the first circulation loop.
[0010] According to a preferred implementation aspect of the utility model, a fourth channel is provided between the bottom of the second liquid tank and one end of the forward osmosis membrane group, a fifth channel is provided between the other end of the forward osmosis membrane group and the top of the second liquid tank, and the second liquid tank, the fourth channel, the forward osmosis membrane group and the fifth channel together form the second circulation loop.
[0011] According to a preferred implementation aspect of the utility model, the second liquid tank also includes a third inlet, and the second inlet and the third inlet are both located at the top of the second liquid tank, and the third inlet is used to pass the plant extract flowing in the second circulation loop into the second liquid tank.
[0012] According to a preferred implementation aspect of the utility model, a first discharge channel is provided on the third channel, and the first discharge channel is used to discharge the plant extract of the third concentration to the outside.
[0013] According to a preferred implementation aspect of the utility model, a second discharge channel is provided on the fourth channel, and the second discharge channel is used for discharging the plant extract of the fourth concentration to the outside.
[0014] According to a preferred implementation aspect of the present utility model, the third concentration is equal to the fourth concentration, the third concentration is less than the first concentration, and the fourth concentration is greater than the second concentration.
[0015] According to a preferred implementation aspect of the utility model, the concentrating device includes a first outlet, the first liquid tank includes a second outlet, the second liquid tank includes a third outlet, the forward osmosis membrane group includes a fourth outlet and a fifth outlet, the first outlet is located at the bottom of the concentrating device, the second outlet is located at the bottom of the first liquid tank, and the third outlet is located at the bottom of the second liquid tank.
[0016] According to a preferred implementation aspect of the utility model, the first outlet leads to the first channel, the second outlet leads to the third channel, the third outlet leads to the fourth channel, the fourth outlet leads to the second channel, and the fifth outlet leads to the fifth channel.
[0017] According to a preferred implementation aspect of the utility model, a feed channel is provided on the top of the concentration device, and an extension channel is further provided between the third channel and the feed channel. In some embodiments of the utility model, the extension channel is provided to ensure that the plant extract flowing from the first feed liquid tank to the forward osmosis membrane group can be selected to pass through the concentration device again according to actual needs, so as to achieve the effect of controlling the concentration.
[0018] Compared with the prior art, the utility model is beneficial in that: the utility model is a forward osmosis concentration system for plant extracts, which uses the plant extracts that are directly concentrated by the concentration equipment as hypertonic liquid and the plant extracts that are not concentrated as hypotonic liquid through the arrangement of the concentration equipment, the first liquid tank and the second liquid tank, which can effectively avoid high salt pollution or loss of low molecular weight effective ingredients and aroma components caused by insufficient precision of the forward osmosis membrane, and can produce two products, high-quality plant extract concentrates and general-quality plant extract concentrates, at one time. In addition, compared with using vacuum concentration equipment alone to produce general-quality plant extracts and using forward osmosis concentration technology alone to produce high-quality plant extracts, the forward osmosis concentration system of the utility model can effectively save more than 30% of production energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.
[0020] Figure 1 This is a schematic diagram of the structure of the forward osmosis concentration system in the preferred embodiment of the utility model;
[0021] Wherein, the accompanying drawings are marked as follows:
[0022] Concentration equipment-1, first feed liquid tank-2, second feed liquid tank-3, forward osmosis membrane group-4, feed channel-51, first channel-52, second channel-53, third channel-54, fourth channel-55, fifth channel-56, extension channel-57, first discharge channel-61, second discharge channel-62. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.
[0024] See also Figure 1 The forward osmosis concentration system of the plant extract of this embodiment includes a concentration device 1, a first liquid tank 2, a second liquid tank 3 and a forward osmosis membrane group 4, and the concentration device 1 is preferably an MVR falling film concentration device. Among them, a feed channel 51 is provided at the top of the concentration device 1, a first channel 52 is provided between the concentration device 1 and one end of the forward osmosis membrane group 4, a second channel 53 is provided between the other end of the forward osmosis membrane group 4 and the top of the first liquid tank 2, and a third channel 54 is provided between the bottom of the first liquid tank 2 and the second channel 53, so that the first channel 52, the forward osmosis membrane group 4, the second channel 53 and the third channel 54 form a first circulation loop. A fourth channel 55 is provided between the bottom of the second liquid tank 3 and one end of the forward osmosis membrane group 4, and a fifth channel 56 is provided between the other end of the forward osmosis membrane group 4 and the top of the second liquid tank 3, so that the second liquid tank 3, the fourth channel 55, the forward osmosis membrane group 4 and the fifth channel 56 form a second circulation loop.
[0025] Further, the top of the concentration device 1 is provided with a first inlet, and the bottom of the concentration device 1 is provided with a first outlet; the top of the first liquid tank 2 is provided with a fourth inlet, and the bottom of the first liquid tank 2 is provided with a second outlet; the top of the second liquid tank 3 is provided with a second inlet and a third inlet, and the bottom of the second liquid tank 3 is provided with a third outlet; the forward osmosis membrane group 4 includes a fourth outlet and a fifth outlet. The first outlet leads to the first channel 52, the second outlet leads to the third channel 54, the third outlet leads to the fourth channel 55, the fourth outlet leads to the second channel 53, and the fifth outlet leads to the fifth channel 56.
[0026] Specifically, a plant extract of a first concentration is introduced into the concentration device 1 through the feed channel 51 and the first inlet, and is concentrated to Brix ≥ 30% in the concentration device 1, so that the plant extract enters the first channel 52 from the first outlet as a hypertonic solution, and then enters the forward osmosis membrane group 4. Then, the plant extract enters the second channel 53 from the fourth outlet of the forward osmosis membrane group 4, and then enters the first feed liquid tank 2, and then enters the third channel 54 from the second outlet of the first feed liquid tank 2. The third channel 54 is connected to the first channel 52, so that the plant extract can circulate back and forth in the first circulation loop.
[0027] The second inlet of the second liquid tank 3 is used to introduce a plant extract of a second concentration into the second liquid tank 3, flow from the third outlet of the second liquid tank 3 to the fourth channel 55, enter the forward osmosis membrane group 4 as a hypotonic solution, and then enter the fifth channel 56 from the fifth outlet of the forward osmosis membrane group 4, and finally enter it from the third inlet of the second liquid tank 3, so as to realize back and forth circulation in the second circulation loop for continuous concentration.
[0028] In this embodiment, the osmotic pressure of the plant extract at the first concentration is greater than the osmotic pressure of the plant extract at the second concentration, and the first concentration is greater than the second concentration.
[0029] Furthermore, an extension channel 57 is provided between the third channel 54 and the feed channel 51, and the extension channel 57 is connected to the third channel 54 and the feed channel 51. The setting of the extension channel 57 allows the plant extract flowing from the first liquid tank 2 to the third channel 54 to enter the concentration device 1 through the extension channel 57 and the feed channel 51, and then be concentrated, and then circulate in the first circulation loop. This setting is to ensure that it can be selected according to actual needs whether the plant extract flowing from the first liquid tank 2 to the forward osmosis membrane group 4 passes through the concentration device 1 again to achieve the effect of controlling the concentration.
[0030] Furthermore, in the present embodiment, a first discharge channel 61 is provided on the third channel 54, and the first discharge channel 61 is used to discharge a plant extract of a third concentration; a second discharge channel 62 is provided on the fourth channel 55, and the second discharge channel 62 is used to discharge a plant extract of a fourth concentration. Moreover, the third concentration is equal to the fourth concentration, the third concentration is less than the first concentration, and the fourth concentration is greater than the second concentration. In the process of concentration in the forward osmosis concentration system of the present invention, a saccharimeter can be used for real-time sampling and detection, or an online monitoring method can be set to confirm the concentration of the plant extract in the first liquid tank 2 and the second liquid tank 3. When the concentrations of the two are equal, osmotic equilibrium is reached.
[0031] In this embodiment, the working process of the forward osmosis concentration system of the plant extract is as follows:
[0032] After the ordinary quality plant extract is concentrated to Brix ≥ 30% by the concentration device 1, it enters the forward osmosis membrane group 4 as a hypertonic solution (plant extract of the first concentration); the high-quality plant extract (plant extract of the second concentration) is passed into the second liquid tank 3 and enters the forward osmosis membrane group 4 as a hypotonic solution. Under the combined effect of the osmotic pressure difference between the two and the external pressure, the concentration of the ordinary quality plant extract in the first circulation loop continues to decrease, and the concentration of the high-quality plant extract in the second circulation loop continues to increase. When the two reach osmotic equilibrium, two plant extract concentrates with a concentration of more than 15% are finally obtained. Among them, the first discharge channel 61 of the first liquid tank 2 flows out the ordinary quality plant extract concentrate, and the second discharge channel 62 of the second liquid tank 3 flows out the high-quality plant extract concentrate.
[0033] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A forward osmosis concentration system for plant extracts, characterized in that: It includes a concentrating device, a first liquid tank, a second liquid tank and a forward osmosis membrane group, a first circulation loop is formed between the forward osmosis membrane group and the first liquid tank, a second circulation loop is formed between the second liquid tank and the forward osmosis membrane group, the concentrating device includes a first inlet, the second liquid tank includes a second inlet, the first inlet is used to pass a plant extract of a first concentration into the concentrating device, the second inlet is used to pass a plant extract of a second concentration into the second liquid tank, the osmotic pressure of the plant extract of the first concentration is greater than the osmotic pressure of the plant extract of the second concentration, and the first concentration is greater than the second concentration.
2. The forward osmosis concentration system according to claim 1, characterized in that: A first channel is arranged between the concentrating device and one end of the forward osmosis membrane group, a second channel is arranged between the other end of the forward osmosis membrane group and the top of the first liquid tank, a third channel is arranged between the bottom of the first liquid tank and the second channel, and the first channel, the forward osmosis membrane group, the second channel and the third channel together form the first circulation loop.
3. The forward osmosis concentration system according to claim 2, characterized in that: A fourth channel is arranged between the bottom of the second liquid tank and one end of the forward osmosis membrane group, a fifth channel is arranged between the other end of the forward osmosis membrane group and the top of the second liquid tank, and the second liquid tank, the fourth channel, the forward osmosis membrane group and the fifth channel together form the second circulation loop.
4. The forward osmosis concentration system according to claim 3, characterized in that: The second liquid tank further includes a third inlet. The second inlet and the third inlet are both located at the top of the second liquid tank. The third inlet is used to pass the plant extract flowing in the second circulation loop into the second liquid tank.
5. The forward osmosis concentration system according to claim 3, characterized in that: The third channel is provided with a first discharge channel, and the first discharge channel is used for discharging the plant extract of the third concentration to the outside.
6. The forward osmosis concentration system according to claim 5, characterized in that: The fourth channel is provided with a second discharge channel, and the second discharge channel is used for discharging the plant extract with a fourth concentration outward.
7. The forward osmosis concentration system according to claim 6, characterized in that: The third concentration is equal to the fourth concentration, the third concentration is less than the first concentration, and the fourth concentration is greater than the second concentration.
8. The forward osmosis concentration system according to claim 4, characterized in that: The concentrating device includes a first outlet, the first liquid tank includes a second outlet, the second liquid tank includes a third outlet, the forward osmosis membrane group includes a fourth outlet and a fifth outlet, the first outlet is located at the bottom of the concentrating device, the second outlet is located at the bottom of the first liquid tank, and the third outlet is located at the bottom of the second liquid tank.
9. The forward osmosis concentration system according to claim 8, characterized in that: The first outlet leads to the first channel, the second outlet leads to the third channel, the third outlet leads to the fourth channel, the fourth outlet leads to the second channel, and the fifth outlet leads to the fifth channel.
10. The forward osmosis concentration system according to claim 2, characterized in that: A feed channel is arranged on the top of the concentration device, and an extension channel is arranged between the third channel and the feed channel.