Negative pressure extraction device for reducing loss of extract

Abstract

The utility model provides a kind of negative pressure extraction device reducing extract flow loss, belong to plant extraction technical field, including extraction tank, the extraction tank is connected with concentration tank by pipeline, the concentration tank top is sequentially connected with steam valve, primary cooler, condenser and oil-water separator by pipeline, oil phase outlet pipe and liquid phase outlet pipe are equipped on the oil-water separator, oil phase valve is installed on the oil phase outlet pipe, liquid phase valve is installed on the liquid phase outlet pipe, the top of oil-water separator is also connected with vacuum pump by pipeline, the vacuum pump is used to provide negative pressure environment.The scheme is added secondary cooler between primary cooler and condenser, and the volatile active ingredient that is not completely liquefied in primary condensation is effectively captured by secondary deep cooling of steam, to prevent it from entering vacuum system with gas phase and causing loss, significantly improve the effective component recovery rate and operation safety of plant extraction process.

Description

Technical Field

[0001] This utility model relates to the field of plant extraction technology, specifically to a negative pressure extraction device that reduces extract loss. Background Technology

[0002] Plant extraction refers to the selective separation or enrichment of one or more bioactive or functional components from parts of a plant, such as roots, stems, leaves, flowers, fruits, seeds, or the whole plant, using physical, chemical, or biological methods. The most widely used method in current plant extraction is the integrated "extraction-concentration" process, which includes extraction in an extraction tank, concentration in a concentration tank, cooling in a condensation system, and separation in a separator. To avoid the destruction of effective substances in the extract by high temperatures, low-temperature extraction using negative pressure to lower the solvent boiling point is often employed in practical applications. However, during negative pressure extraction, some uncondensed effective substances may enter the negative pressure system, resulting in yield loss. Furthermore, some plant extracts may contain substances with potential side effects, and leakage of these substances could pose health risks to operators. Utility Model Content

[0003] The purpose of this invention is to provide a negative pressure extraction device that reduces extract loss, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A negative pressure extraction device for reducing extract loss includes: an extraction tank, which is connected to a concentration tank via a pipeline; a steam valve, a primary cooler, a condenser, and an oil-water separator are sequentially connected to the top of the concentration tank via pipelines; the oil-water separator is provided with an oil phase outlet pipe and a liquid phase outlet pipe; an oil phase valve is installed on the oil phase outlet pipe; a liquid phase valve is installed on the liquid phase outlet pipe; and a vacuum pump is also connected to the top of the oil-water separator via a pipeline, the vacuum pump being used to provide a negative pressure environment.

[0006] It also includes a secondary cooler, the top of which is connected to a pipe between the primary cooler and the condenser, the lower part of which is connected to the primary cooler via a pipe, the bottom of which is connected to the top of the oil-water separator, the pipe between the oil-water separator and the liquid phase valve is connected to a return pipe via a tee, the return pipe is connected to the extraction tank, and a return valve is fixedly installed on the return pipe.

[0007] Preferably, a filter and a sight glass are connected in sequence on the pipe between the extraction tank and the concentration tank.

[0008] Preferably, a cooling valve is provided on the pipe between the bottom of the secondary cooler and the primary cooler;

[0009] Preferably, a vacuum valve is fixedly installed on the pipeline between the oil-water separator and the vacuum pump;

[0010] Preferably, a gas-liquid separator is provided between the steam valve and the primary cooler;

[0011] Preferably, the top of the extraction tank is connected to a pipeline between the steam valve and the gas-liquid separator via a steam pipe, and a pressure control valve is fixedly installed on the steam pipe.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] This solution adds a secondary cooler between the primary cooler and the condenser to deeply cool the steam, effectively capturing volatile active ingredients that were not fully liquefied in the primary condenser and preventing them from being lost into the vacuum system with the gas phase, thereby improving the extraction yield. Simultaneously, a reflux pipe with a return valve is installed at the oil-water separator outlet, allowing the liquid phase containing trace amounts of active ingredients or incompletely separated components to be returned to the extraction tank, achieving material recycling and reducing resource waste. This solution, by optimizing the condensation and reflux systems, significantly improves the recovery rate of active ingredients and operational safety in the plant extraction process. Attached Figure Description

[0014] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 01. Extraction tank; 02. Concentration tank; 03. Steam valve; 04. Primary cooler; 05. Condenser; 06. Oil-water separator; 07. Oil phase outlet pipe; 08. Liquid phase outlet pipe; 09. Steam pipe; 10. Pressure control valve; 11. Vacuum pump; 12. Secondary cooler; 13. Return pipe; 14. Return valve; 15. Filter; 16. Pipe sight glass; 17. Cooling valve; 18. Vacuum valve; 19. Gas-liquid separator; 20. Drain valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0020] Example 1

[0021] A negative pressure extraction device to reduce extract loss, such as Figure 1 As shown, the system includes an extraction tank 01, a concentration tank 02, a gas-liquid separator 19, a primary cooler 04, a condenser 05, and an oil-water separator 06 connected in sequence by pipes. A secondary condenser 05 is also connected in parallel between the primary cooler 04 and the condenser 05.

[0022] Specifically, the bottom of the extraction tank 01 has a valve for draining liquid. This valve is connected to the upper part of the concentration tank 02 through a pipe. A filter 15 and a sight glass 16 are fixedly installed on the pipe. The sight glass 16 is located between the filter 15 and the concentration tank 02. The filter 15 is used to filter the liquid extracted by the extraction tank 01 to prevent solid residue from entering the extraction tank 01. The sight glass 16 is used to observe the state of the liquid entering the extraction tank 01.

[0023] like Figure 1 As shown, the top of the concentration tank 02 is connected in sequence via pipes to a steam valve 03, a primary cooler 04, a condenser 05, and an oil-water separator 06. The gas evaporated from the concentration tank 02 enters the oil-water separator 06 after being cooled along the aforementioned connection path. A gas-liquid separator 19 is also fixedly installed on the pipe between the steam valve 03 and the primary cooler 04. The gas-liquid separator 19 is used to separate entrained droplets and to initially separate the liquid in the concentration tank 02 according to a temperature gradient during the evaporation process. The easily liquefied portion is liquefied and refluxed to obtain a higher purity target substance. The steam flowing out of the gas-liquid separator 19 enters the cooler for the next cooling step.

[0024] Furthermore, a valve (not shown in the figure) for discharging condensate is fixedly installed at the bottom of condenser 05. A secondary condenser 05 is also fixedly installed between the primary cooler 04 and condenser 05. The top of the secondary condenser 05 is connected to the pipe between the cooler and condenser 05 via a pipe. The lower part of the secondary cooler 12 is connected to the primary cooler 04 via a pipe, so that the steam entering the primary cooler 04 is divided into two parts. One part enters the condenser 05 directly, and the other part enters the secondary cooler 12 simultaneously for further cooling. The cooled steam then flows back to the primary cooler 04 and mixes with the steam there, thereby achieving overall cooling of the steam and preventing the loss of extract due to excessively high tail steam temperature. In addition, the bottom of the secondary condenser 05 is connected to the top of the oil-water separator 06. A drain valve 20 for controlling the discharge of condensate is installed on the pipe connecting the two, preventing condensate accumulation in the secondary cooler 12, facilitating direct discharge, and increasing fault tolerance. A cooling valve 17 is provided on the pipe connecting the lower part of the secondary cooler 12 and the primary cooler 04. The cooling valve 17 controls the switching on and off of the secondary cooler 12.

[0025] Based on density stratification, an oil phase outlet pipe is fixedly installed at the top of the oil-water separator 06, and a liquid phase outlet pipe is fixedly installed at the bottom of the oil-water separator 06. An oil phase valve and a liquid phase valve are respectively installed on the oil phase outlet pipe and the liquid phase outlet pipe. A vacuum pump 11 is also connected to the top of the oil-water separator 06 via a pipe, and a vacuum valve 18 is fixedly installed on this pipe. The vacuum pump 11 provides a negative pressure environment and drives the gas-liquid flow of the system. A return pipe 13 is connected between the oil-water separator 06 and the liquid phase valve via a tee. The return pipe 13 is connected to the top of the extraction tank 01, and a return valve 14 is fixedly installed on the return pipe 13. When water flow is required, the return valve 14 is opened to allow product return. Furthermore, the top of the extraction tank 01 is also connected to the pipe between the steam valve 03 and the gas-liquid separator 19 via a steam pipe 09, and a pressure control valve 10 is fixedly installed on the steam pipe 09.

[0026] Temperature sensors are fixedly installed in the extraction tank, concentration tank, primary cooler, secondary cooler, and condenser, and are connected to an external PLC system for display. In addition, the vacuum pump is also connected to an external PLC system and controlled by the external PLC system. This method is a conventional operation in the field and will not be described in detail here.

[0027] The workflow of this method is as follows: During operation, the plant raw material is extracted in extraction tank 01 by solvent heating. The air pressure valve is opened, and the evaporated gas in extraction tank 01 enters the gas-liquid separator 19 and concentration pipe through steam pipe 09. After extraction, the air pressure valve is closed, and the drain valve at the bottom of extraction tank 01 is opened. Vacuum pump 11 creates negative pressure in the pipeline, driving the extract through filter 15 into concentration tank 02 for concentration. The steam generated during concentration sequentially passes through steam valve 03 and gas-liquid separator 19 into primary cooler 04 (cooling valve 17 can be opened to allow some steam to enter secondary cooler 12 for cooling, or directly into condenser, depending on process requirements). The cooled gas enters condenser 05 for condensation. The condensed liquid mixture enters oil-water separator 06 for phase separation. The oil phase is discharged and collected through oil phase valve, while the liquid phase is discharged through liquid phase valve. Simultaneously, according to the process, reflux valve 14 can be opened to return the liquid phase to extraction tank 01 for further extraction.

[0028] Example 2

[0029] The difference between it and Example 1 is that:

[0030] Condenser 05 is also fixedly connected to a secondary condenser (not shown in the figure), which allows high-boiling-point extracts to be condensed preferentially in condenser 05, while low-boiling-point extracts are condensed in the secondary condenser. This allows the product from condenser 05 to flow into the oil-water separator, while the product from the secondary condenser is discharged and collected.

[0031] The above-described preferred embodiments of the present invention are provided for guidance, but it will be apparent to those skilled in the art that such embodiments are provided merely by way of example. Many modifications, alterations, and alternatives will arise in the mind and spirit of the present invention without departing from its intent. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A negative pressure extraction device for reducing extract loss, comprising: An extraction tank (01) is connected to a concentration tank (02) via a pipe. The top of the concentration tank (02) is connected in sequence via a steam valve (03), a primary cooler (04), a condenser (05), and an oil-water separator (06). The oil-water separator (06) is provided with an oil phase outlet pipe and a liquid phase outlet pipe. An oil phase valve is installed on the oil phase outlet pipe, and a liquid phase valve is installed on the liquid phase outlet pipe. The top of the oil-water separator (06) is also connected via a pipe to a vacuum pump (11), which is used to provide a negative pressure environment. The feature is that it further includes a secondary cooler (12), the top of which is connected to a pipe between the primary cooler (04) and the condenser (05), the lower part of which is connected to the primary cooler (04) through a pipe, the bottom of which is connected to the top of the oil-water separator (06), the pipe between the oil-water separator (06) and the liquid phase valve is connected to a return pipe (13) through a tee, the return pipe (13) is connected to the extraction tank (01), and a return valve (14) is fixedly installed on the return pipe (13).

2. The negative pressure extraction device for reducing extract loss according to claim 1, characterized in that: A filter (15) and a pipe sight glass (16) are connected in sequence on the pipe between the extraction tank (01) and the concentration tank (02).

3. The negative pressure extraction device for reducing extract loss according to claim 1, characterized in that: A cooling valve (17) is provided on the pipe between the bottom of the secondary cooler (12) and the primary cooler (04).

4. The negative pressure extraction device for reducing extract loss according to claim 1, characterized in that: A vacuum valve (18) is fixedly installed on the pipeline between the oil-water separator (06) and the vacuum pump (11).

5. The negative pressure extraction device for reducing extract loss according to claim 1, characterized in that: A gas-liquid separator (19) is provided between the steam valve (03) and the primary cooler (04).

6. The negative pressure extraction device for reducing extract loss according to claim 5, characterized in that: The top of the extraction tank (01) is connected to the pipeline between the steam valve (03) and the gas-liquid separator (19) via a steam pipe (09), and a pressure control valve (10) is fixedly installed on the steam pipe (09).

Images