Continuous external circulation extraction device for active ingredients of natural plants

Abstract

The utility model discloses a continuous external circulation extraction device for active ingredients of natural plants, which comprises a first extractor, a second extractor and a third extractor which are communicated in sequence, and the tops of the first extractor, the second extractor and the third extractor are communicated with an extraction liquid pipeline through pipeline liquid blocking valves. Feed ports are formed in the top ends of the first extractor, the second extractor and the third extractor, discharge ports are formed in the bottoms of the first extractor, the second extractor and the third extractor, heat conducting plate walls are arranged on the side walls of the first extractor, the second extractor and the third extractor, and stirrers are arranged in the first extractor, the second extractor and the third extractor; a heating circuit interface on the wall of the heat conducting plate and the stirrer are electrically connected with the display controller; according to the utility model, the three extractors can sequentially realize constant-temperature timed automatic extraction, the filtering devices are arranged in the extractors to filter impurities in extract liquor, and a quantitative extractant is circularly extracted until saturation, so that the extraction efficiency is improved, and the product recovery rate is high.

Description

Technical Field

[0001] The utility model relates to the technical field of plant active ingredient extraction, in particular to a continuous external circulation extraction device for natural plant active ingredients. Background Art

[0002] Solid-liquid extraction, also known as "leaching," involves separating solid mixtures using a liquid solvent. The solid is immersed in a selected solvent, and the different solubilities of the solid components in the solvent are exploited to force the more soluble components into the solvent, allowing them to be separated from the solid residue. Solid-liquid extraction is widely used in industrial production, analytical testing, and everyday life. For example, in the sugar industry, water is used to extract sugar from sliced ​​beets; in the oil and fat industry, oils are extracted from soybeans, nuts, and seeds; ground coffee is extracted to produce instant coffee; dried tea leaves are extracted to produce instant tea; and essential oils are extracted from flowers.

[0003] Active ingredient extraction uses natural products, especially the roots, stems, leaves, and flowers of plants, as raw materials. Extraction methods and equipment are selected to dissolve the active ingredients to obtain an extract, thereby separating and refining high-purity active products. Traditional extraction uses the principle of "like dissolves like" to select media and is supplemented by methods such as water decoction, maceration, percolation, modified gelatin, reflux, solvent extraction, steam distillation, and sublimation. However, there are problems such as destruction of active ingredients, low extraction efficiency, cumbersome equipment, and long extraction cycles. Active ingredients are generally stored in the cytoplasm of plant cells. The solid, tough, and airtight cell wall is a barrier and obstacle to the extraction of active ingredients. Modern extraction methods use supercritical liquid extraction technology, ultrasound-assisted extraction technology, microwave-assisted extraction technology, two-phase aqueous extraction technology, enzymatic extraction, plant tissue disruption extraction, ultra-high pressure extraction, and high-speed countercurrent chromatography extraction to accelerate the destruction of cell walls, increase the dissolution and diffusion of active ingredients, and improve extraction efficiency. However, there are also problems such as the difficulty in industrializing ultrasonic fields and high-pressure fields, which are only suitable for laboratory research; the safety of ionic liquids is still unclear, and industrialization is uncertain; the more intense thermal effect of microwaves can easily decompose heat-sensitive substances; high-pressure pulses are relatively cumbersome and not suitable for industrial promotion; supercritical fluid technology has high requirements for equipment; chemical additives react chemically with active ingredients, making purification and utilization difficult; bio-enzymatic methods have strict requirements on enzyme selection and experimental conditions; two-phase water extraction has developed slowly, and technical research is urgently needed.

[0004] Currently used solid-liquid extraction devices fall into two main categories. One type involves laboratory extraction devices constructed using traditional glassware, which are complex to install, cumbersome to operate, require small sample sizes, and are time-consuming and labor-intensive. The other type involves large-scale industrial production equipment, primarily for the extraction and concentration of traditional Chinese medicines. These are widely used in the pharmaceutical, food, light, and chemical industries. These devices suffer from expensive instruments, high solvent usage, low product recovery rates, and loss of active ingredients. Neither type of extraction equipment can automatically and continuously extract, requiring a constant amount of extractant to circulate. This makes it difficult to complete extraction quickly and precisely control temperature, and the quality of the extract cannot be effectively guaranteed. Utility Model Content

[0005] In response to the above-mentioned problems in the prior art, the utility model provides a continuous external circulation extraction device for natural plant active ingredients, which solves the problems that the existing extraction devices cannot recycle a certain amount of extract and cannot accurately control the temperature.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] Provided is a continuous external circulation extraction device for natural plant active ingredients, comprising a first extractor, a second extractor, and a third extractor that are connected in sequence, wherein the tops of the first extractor, the second extractor, and the third extractor are connected to an extraction liquid pipeline via a pipeline liquid resistance valve, the tops of the first extractor, the second extractor, and the third extractor are each provided with a feed port, and the bottoms of the first extractor, the second extractor, and the third extractor are each provided with a discharge port, heat conduction plate walls are provided on the side walls of the first extractor, the second extractor, and the third extractor, and a stirrer is provided inside the first extractor, the second extractor, and the third extractor, and the heating circuit interface on the heat conduction plate wall and the stirrer are both electrically connected to a display controller.

[0008] The extractors connected in sequence in the utility model can realize automatic extraction at a constant temperature and time in sequence, so that the material is fully contacted with the extractant in the extractor and mixed evenly. By installing a filtering device in the extractor, impurities in the extract are filtered out, and the quantitative extractant is circulated for extraction until saturation, thereby improving the extraction efficiency and achieving a high product recovery rate.

[0009] Furthermore, a vacuum gauge is provided on the top of the first extractor, the second extractor and the third extractor.

[0010] Furthermore, air regulating valves are provided on the tops of the first extractor, the second extractor and the third extractor.

[0011] In this embodiment, a vacuum gauge and an air regulating valve are provided on the top of the first extractor, the second extractor and the third extractor. Using the above scheme, the vacuum gauge displays the vacuum degree in the extractor, and the air regulating valve is used to adjust the vacuum degree, control the gas inlet and outlet, and protect the extractor from exceeding the maximum tolerable pressure.

[0012] Furthermore, temperature sensors are provided inside the first extractor, the second extractor and the third extractor, and the temperature sensors are electrically connected to the display controller.

[0013] In this embodiment, temperature sensors are provided inside the three extractors. With the above solution, the temperature sensors sense the temperature inside the extractors in real time and transmit the temperature information to the display controller in real time for reference and adjustment by the display controller.

[0014] Furthermore, filtering devices are provided inside the first extractor, the second extractor and the third extractor.

[0015] In this embodiment, the three extractors are all provided with filtering devices. By adopting the above solution, the filtering devices can filter out impurities in the extract to obtain a high-concentration extract of natural plants.

[0016] Furthermore, the bottom of the first extractor is connected to the upper part of the second extractor through a first vacuum pump, the bottom of the second extractor is connected to the upper part of the third extractor through a second vacuum pump, and the bottom of the third extractor is connected to the disc centrifuge through a third vacuum pump.

[0017] In this embodiment, the bottoms of the three extractors are connected in sequence through a vacuum pump. By adopting the above scheme, the vacuum pump can create a pressure difference, thereby realizing liquid transfer between the three extractors, and the solid-liquid separation and clarification of the extract are achieved through the disc centrifuge.

[0018] The utility model discloses a continuous external circulation extraction device for natural plant active ingredients, which has the following beneficial effects:

[0019] 1. The first extractor, the second extractor and the third extractor of the utility model are connected in sequence, and the automatic extraction with constant temperature and timing is realized in sequence through the display controller, so that the material is fully contacted with the extractant in the extractor and mixed evenly, and the quantitative extract is circulated and extracted until saturation with precise temperature control, the extraction efficiency is improved, the product recovery rate is high, and the extraction of plant active ingredients is completed quickly.

[0020] 2. The utility model obtains a high-concentration extract of natural plants by installing a filtering device in the extractor to filter out impurities in the extract.

[0021] 3. The utility model can accurately add the extraction liquid through the pipeline liquid resistance valve, clarify the material ratio, save the amount of extraction agent, quantitatively extract the extraction agent in a circular extraction until saturation, improve the extraction efficiency, and increase the product recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a continuous external circulation extraction device for natural plant active ingredients of the utility model.

[0023] Among them, 1. feed port; 2. vacuum gauge; 3. air regulating valve; 4. pipeline liquid resistance valve; 5. temperature sensor; 6. agitator; 7. discharge port; 8. filter device; 9. heating circuit interface; 10. vacuum pump; 11. heat conduction plate wall; 12. first extractor; 13. second extractor; 14. third extractor; 15. display controller; 16. disc centrifuge; 17. second vacuum pump; 18. third vacuum pump. DETAILED DESCRIPTION

[0024] The specific implementation methods of the present invention are described to facilitate technical personnel in this technical field to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0025] Example 1

[0026] refer to Figure 1 , is a structural diagram of a continuous external circulation extraction device for natural plant active ingredients in this embodiment, which aims to solve the problems that existing extraction devices cannot recycle a certain amount of extract and cannot accurately control the temperature. The specific structure of this embodiment will be described in detail below.

[0027] A device for continuous external circulation extraction of natural plant active ingredients comprises a first extractor 12, a second extractor 13 and a third extractor 14 which are connected in sequence.

[0028] Specifically, the tops of the first extractor 12 , the second extractor 13 and the third extractor 14 are all connected to the extraction liquid pipeline through the pipeline liquid-blocking valve 4 .

[0029] In this embodiment, the pipeline liquid-blocking valve 4 adopts an existing 304 two-piece ball valve with a model of DN20. The pipeline liquid-blocking valve 4 can control the extract in the extract pipeline to enter the first extractor 12, the second extractor 13 and the third extractor 14.

[0030] Specifically, the top of the first extractor 12 , the second extractor 13 and the third extractor 14 are all provided with a feed port 1 , and the bottom of the first extractor 12 , the second extractor 13 and the third extractor 14 are all provided with a discharge port 7 .

[0031] In this embodiment, the feed port 1 is used for materials to enter the first extractor 12, the second extractor 13 and the third extractor 14, and the discharge port 7 is used for taking the remaining materials after extraction out of the first extractor 12, the second extractor 13 and the third extractor 14.

[0032] Specifically, a heat conducting plate wall 11 is provided on the side walls of the first extractor 12 , the second extractor 13 and the third extractor 14 , and an agitator 6 is provided inside each of them. The heating circuit interface 9 on the heat conducting plate wall 11 and the agitator 6 are electrically connected to the display controller 15 .

[0033] In this embodiment, the extractors all use an electrically heated stirring tank with a heating function, model DJ-1200, the display controller 15 uses an existing digital display controller, model SWP-C703-01-23-HL, and the stirrer 6 uses an existing 304 stainless steel two-blade stirring paddle, model JJ-1.

[0034] The display controller 15 is connected to the first extractor 12, the second extractor 13 and the third extractor 14 via wires, displays and adjusts the liquid extraction temperature of the first extractor 12, the second extractor 13 and the third extractor 14, and can set the start time of the stirrer 6 and alarm on time.

[0035] Specifically, the bottom of the first extractor 12 is connected to the upper part of the second extractor 13 through the first vacuum pump 10, the bottom of the second extractor 13 is connected to the upper part of the third extractor 14 through the second vacuum pump 17, and the bottom of the third extractor 14 is connected to the disc centrifuge 16 through the third vacuum pump 18.

[0036] In this embodiment, the first vacuum pump 10, the second vacuum pump 17 and the third vacuum pump 18 are all existing small vacuum pumps, model FY-2C-N.

[0037] Stainless steel pipes are used between the first extractor 12, the second extractor 13 and the third extractor 14, which are connected in sequence through a vacuum pump 10. A stainless steel pipe is used between the third extractor 14 and the disc centrifuge 16, which is connected through the vacuum pump 10. The liquid circulation in the pipe depends on the vacuum pump 10, and the vacuum pump 10 can create a pressure difference to achieve liquid transfer.

[0038] The material is fed into the first extractor 12, the second extractor 13 and the third extractor 14 through the feed port 1, and the display controller 15 is connected to the heat conducting plate wall 11 and the stirrer 6 in sequence to realize automatic extraction with constant temperature and timing in sequence, so that the material is fully in contact with the extractant in the extractor and mixed evenly, and the quantitative extract is circulated and extracted with precise temperature control until saturation, thereby improving the extraction efficiency and the product recovery rate, thereby quickly completing the extraction of the plant active ingredients.

[0039] Example 2

[0040] refer to Figure 1, is a structural diagram of a continuous external circulation extraction device for natural plant active ingredients in this embodiment, which aims to solve the problems that existing extraction devices cannot recycle a certain amount of extract and cannot accurately control the temperature. The specific structure of this embodiment will be described in detail below.

[0041] Specifically, a vacuum gauge 2 is provided on the top of the first extractor 12 , the second extractor 13 and the third extractor 14 , and an air regulating valve 3 is provided on the top of the first extractor 12 , the second extractor 13 and the third extractor 14 .

[0042] In this embodiment, the vacuum meter 2 adopts an existing stainless steel vacuum meter, model Y-100, and the air regulating valve 3 adopts an existing air pressure regulating valve, model QTY-100, wherein the vacuum meter 2 is installed on the upper left of each extractor, and the vacuum meter 2 is used to display the vacuum degree in each extractor, and the air regulating valve 3 is installed on the upper right of each extractor. When checking the vacuum degree in the extractor, the air regulating valve 3 is used to adjust the vacuum degree in each extractor, control the gas inlet and outlet, and protect the extractor from exceeding the maximum tolerable pressure.

[0043] Specifically, each of the first extractor 12 , the second extractor 13 and the third extractor 14 is provided with a temperature sensor 5 , and the temperature sensor 5 is electrically connected to the display controller 15 .

[0044] In this embodiment, the temperature sensor 5 uses an existing high-temperature resistant temperature sensor, model PT-100. The temperature sensor 5 senses the temperature inside each extractor in real time and transmits the temperature information to the display controller 15 in real time for reference by the display controller 15, which adjusts the heat conduction plate wall 11 to achieve regulation and control of the internal temperature of each extractor.

[0045] Specifically, the first extractor 12 , the second extractor 13 and the third extractor 14 are each provided with a filtering device 8 .

[0046] In this embodiment, the filter device 8 can filter impurities in the extract in each extractor. The filter device 8 can be a 600-mesh stainless steel mesh filter, which uses a stainless steel perforated mesh with a hard skeleton. It will not deform when used in a high-pressure environment. The mesh surface is uniform and flat, corrosion-resistant, heat-resistant, deep-drawing low-temperature strength, and has good mechanical properties. It has the advantages of high efficiency, low loss, and long service life.

[0047] The working principle of the continuous external circulation extraction device for natural plant active ingredients in this scheme is:

[0048] In practical application, the utility model Figure 1A certain amount of solid material enters the first extractor 12 through the feed port 1. A general extractant (such as water) enters the first extractor 12 directly through a pipe controlled by a pipe-blocking valve 4. Special extractants can enter through the feed port. The extractor outflow valve and discharge port 7 are closed. The display controller 15 controls the agitator 6 and heat-conducting plate wall 11 to start operation, turning on the heating and setting a constant temperature and extraction time. The temperature sensor 5 transmits the extractant temperature to the display controller 15, and the extraction time of the first extractor 12 is set to ensure that the solid material and the extractant are fully mixed in the vessel, allowing for material exchange.

[0049] After completion, close the gas regulating valve of the first extractor 12, open the gas regulating valve of the second extractor 13, and start the vacuum pump 10 between the first extractor 12 and the second extractor 13. The extract obtained from the first extractor 12 enters the second extractor 13 through the downstream pipeline. Add an equal amount of solid material to the second extractor 13, and repeat the above operation in the first extractor 12 to achieve a second extraction of the quantitative extractant. Using a vacuum pump, repeat the above operation to transfer the high-concentration extract obtained from the second extractor 13 to the third extractor 14. Add a quantitative amount of solid material to the third extractor 14 through the feed port 1, and continue to circulate the added quantitative extractant. At this time, the extraction concentration reaches saturation. Use a vacuum pump to transport the extremely high-concentration extract obtained from the third extractor 14 to the disc centrifuge 16 to separate solid impurities smaller than 600 mesh to obtain a high-concentration extract of natural plants.

[0050] After the natural plant solid material in the three-stage extractor is extracted once, the active ingredients are not completely extracted. Next, a quantitative extractant enters the pipeline or feed port 1 controlled by the pipeline liquid resistance valve 4. The above operation is repeated until the solid materials in the three extractors fade and become odorless, and the obtained extract is lighter in color. All the extracts are filtered and combined.

[0051] Example 3

[0052] refer to Figure 1 , is a structural schematic diagram of a natural plant active ingredient continuous external circulation extraction device of this embodiment, which aims to solve the problems that the existing extraction device cannot recycle a fixed amount of extract and cannot accurately control the temperature.

[0053] The whole herb powder (20 mesh) of Ganhuangcao enters the first extractor 12 from the feed port 1, and the extract (water) enters the first extractor 12 directly from the pipeline controlled by the pipeline liquid resistance valve 4, and the extractor outflow valve and the discharge port 7 are closed.

[0054] Open the air regulating valve 3, the display controller 15 controls the stirrer 6 and the heat conducting plate wall 11 to start working, turn on the heating and set a constant temperature, the temperature sensor 5 transmits the real-time temperature of the water to the display controller 15, and sets the extraction time of the first extractor 12 to fully mix the whole herb powder of Ganhuangcao and water in the vessel, carry out material exchange and active component dissolution, and complete the first extraction of the quantitative extractant.

[0055] After the first extraction is completed, the gas regulating valve 3 of the first extractor 12 and the second extractor 13 is closed, the gas regulating valve 3 of the second extractor 13 is opened, and the vacuum pump 10 between the first extractor 12 and the second extractor 13 is turned on. The extract obtained in the first extractor 12 will enter the second extractor 13 through the downstream pipeline. An equal amount of whole herb powder of the herb ...

[0056] When the second extraction is complete, the gas regulating valve 3 of the second extractor 13 is closed, the gas regulating valve 3 of the third extractor 14 is opened, and the vacuum pump 10 between the second and third extractors 13, 14 is turned on. The higher-concentration Herba ...

[0057] The previously added extractant is continuously recycled. When the extraction concentration reaches saturation, the extremely high-concentration extract in the third extractor 14 is transported to the disc stack centrifuge 16 by the vacuum pump 10. The disc stack centrifuge 16 separates solid impurities with a size smaller than 600 mesh to obtain a high-concentration extract of natural plants.

[0058] After the powder material of the whole herb of the yellow grass in the three extractors was extracted once, the active ingredients were not completely extracted. Next, a quantitative extractant water was added from the pipeline controlled by the pipeline liquid resistance valve 4. The above operation was repeated until the powder material in the three extractors faded and became odorless. The obtained extract was lighter in color. All the extracts were filtered and combined.

[0059] Although the specific embodiments of the utility model are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A continuous external circulation extraction device for natural plant active ingredients, characterized by: It comprises a first extractor (12), a second extractor (13) and a third extractor (14) which are connected in sequence; The tops of the first extractor (12), the second extractor (13) and the third extractor (14) are all connected to the extraction liquid pipeline through the pipeline liquid blocking valve (4); The tops of the first extractor (12), the second extractor (13) and the third extractor (14) are all provided with feed ports (1), and the bottoms of the first extractor (12), the second extractor (13) and the third extractor (14) are all provided with discharge ports (7); The first extractor (12), the second extractor (13), and the third extractor (14) are provided with heat-conducting plate walls (11) on their side walls, and are each provided with a stirrer (6) therein; The heating circuit interface (9) on the heat conducting plate wall (11) and the stirrer (6) are both electrically connected to the display controller (15).

2. The continuous external circulation extraction device for natural plant active ingredients according to claim 1, characterized in that: A vacuum gauge (2) is provided on the top of each of the first extractor (12), the second extractor (13), and the third extractor (14).

3. The continuous external circulation extraction device for natural plant active ingredients according to claim 1, characterized in that: Gas regulating valves (3) are provided on the tops of the first extractor (12), the second extractor (13), and the third extractor (14).

4. The continuous external circulation extraction device for natural plant active ingredients according to claim 1, characterized in that: Temperature sensors (5) are provided inside the first extractor (12), the second extractor (13), and the third extractor (14), and the temperature sensors (5) are electrically connected to the display controller (15).

5. The continuous external circulation extraction device for natural plant active ingredients according to claim 1, characterized in that: The first extractor (12), the second extractor (13), and the third extractor (14) are each provided with a filtering device (8) therein.

6. The continuous external circulation extraction device for natural plant active ingredients according to claim 1, characterized in that: The bottom of the first extractor (12) is connected to the top of the second extractor (13) via a first vacuum pump (10); the bottom of the second extractor (13) is connected to the top of the third extractor (14) via a second vacuum pump (17); and the bottom of the third extractor (14) is connected to the disc centrifuge (16) via a third vacuum pump (18).

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