Continuous micro-extraction equipment with adjustable number of extraction units

Abstract

The utility model discloses continuous micro-extraction equipment with adjustable number of extraction units, which belongs to the technical field of extraction, and comprises n stages of micro-extraction units and an extraction execution system, preferably comprises a liquid level control system, the device comprises n micro-mixers, n clarifying tanks, a light-phase feeding storage tank, a heavy-phase feeding storage tank, a light-phase discharging storage tank, a heavy-phase discharging storage tank and a liquid pipeline, the continuous micro-extraction equipment with the adjustable number of the extraction units can avoid the emulsification phenomenon in the multi-stage extraction process, improves the extraction efficiency, is high in integration level and good in extraction effect, can realize self-sensing, self-decision, self-adaption and self-execution of the multi-stage continuous extraction process, automatically executes the multi-stage continuous extraction process, and improves the extraction efficiency. The height of an extraction phase interface is automatically sensed, the flow of the interstage pump is adaptively adjusted under the condition that the feeding flow changes, manual operation is not needed, the automation degree is high, and labor is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of extraction, specifically relates to a continuous microextraction equipment with adjustable extraction unit quantity. BACKGROUND

[0002] Extraction is a separation and purification technology based on the solubility difference between components, which selectively extracts target substances from raw materials by selecting appropriate solvents. The equipment used is simple, and the purification efficiency is high. Extraction technology has been widely used in chemical industry, medicine, food, environmental protection and other fields. However, when there are compounds with highly similar physicochemical properties in the system to be separated, the conventional single extraction process cannot achieve effective separation, and repeated extraction operation must be used to achieve the expected separation effect. However, this multi-stage extraction process not only significantly increases the operation steps and organic solvent consumption, but also leads to a series of technical bottlenecks such as limited separation efficiency and prolonged process cycle. In addition, if the extracted liquid and the raffinate have similar properties, there may be emulsification, and the extracted liquid and the raffinate are difficult to separate, which reduces the extraction efficiency, and the extracted liquid and the raffinate have a certain mutual solubility during the extraction process. Each extraction will cause the volume of the extracted liquid and the raffinate to change, and the operator can only adjust the dosage of the next stage by experience, which is time-consuming and laborious, and the operation fault tolerance is low.

[0003] The Chinese patent document with publication number CN215691835U discloses an extraction device, which includes a stirrer, a mixed mass transfer section, and a two-phase clarification section. The outlet end of the mixed mass transfer section is in communication with the middle part of the two-phase clarification section. The stirring end of the stirrer is located in the mixed mass transfer section. A grid is arranged near the position of the two-phase clarification section in the mixed mass transfer section. A light phase outlet is arranged at the upper part of the two-phase clarification section. A heavy phase outlet is arranged at the lower part of the two-phase clarification section.

[0004] The Chinese patent document with publication number CN215085025U discloses an extraction column, which includes a column body, a heavy liquid inlet and a light liquid outlet arranged at the top of the column body, a light liquid inlet and a heavy liquid outlet arranged at the bottom of the column body, a distributor and a wire mesh unit arranged inside the column body. The wire mesh unit is installed above the distributor.

[0005] The Chinese patent document with publication number CN221771582U discloses an extraction device. The liquid inside the extraction cylinder is divided into three layers of extracted liquid, raffinate, and a small amount of mixed liquid through the cooperation of the goose neck column, the mounting cavity, the electric push rod, and the liquid separation cylinder. The mixed liquid can be discharged through the connection pipe, water pump, and air pump, so that pure extracted liquid and raffinate can be obtained when the liquid outlet pipe is opened.

[0006] Although the above-mentioned prior art has made some improvements on the extraction equipment, it cannot solve the problem of emulsification in the multi-stage extraction process, and cannot realize the automatic control of the extraction process. Practical new content

[0007] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a continuous micro - extraction equipment of adjustable extraction unit quantity.

[0008] The specific technical scheme is as follows:

[0009] A continuous micro - extraction equipment of adjustable extraction unit quantity, including: n grade micro - extraction unit and extraction execution system, wherein n is integer, n is 2 at least;

[0010] In n grade micro - extraction unit, it contains n micro - mixers, n clarifying tanks, a light phase feed storage tank, a heavy phase feed storage tank, a light phase discharge storage tank, a heavy phase discharge storage tank and liquid pipeline;The clarifying tank side from bottom to top includes at least 3 openings for feeding and discharging, wherein the heavy phase discharge port is located at the lower end of the feed port, and the light phase discharge port is located at the upper end of the feed port;

[0011] Extraction execution system includes n heavy phase pumps and n light phase pumps, and the 1st heavy phase pump is arranged on the liquid pipeline of the heavy phase feed storage tank and the 1st clarifying tank, the xth heavy phase pump is arranged on the liquid pipeline of the x-1th clarifying tank and the xth clarifying tank, and the nth clarifying tank is connected with the heavy phase discharge storage tank, wherein x is integer, n is equal to or greater than x and greater than 1;The nth light phase pump is arranged on the liquid pipeline of the light phase feed storage tank and the nth clarifying tank, the yth light phase pump is arranged on the liquid pipeline of the y+1th clarifying tank and the yth clarifying tank, and the 1st clarifying tank is connected with the light phase discharge storage tank, wherein y is integer, n is greater than y and greater than or equal to 1;

[0012] The pump-out pipeline of the zth heavy phase pump is connected with the pump-out pipeline of the zth light phase pump through the zth micro - mixer, and the zth micro - mixer is connected with the zth clarifying tank through the feed pipeline, wherein z is integer, n is greater than or equal to z and greater than or equal to 1.

[0013] Further, the number of micro - extraction units in the continuous micro - extraction equipment of adjustable extraction unit quantity can be adjusted as required, and optionally, n is greater than or equal to 3.

[0014] Preferably, the micro - mixer is T-shaped or Y-shaped tee structure.

[0015] Preferably, the clarifying tank is cylindrical, when the clarifying tank side from bottom to top includes >3 openings, the position of the heavy phase discharge port, the light phase discharge port or the feed port is switched according to the size of liquid flow or the extraction condition.

[0016] Preferably, the inner diameter of the micro - mixer is 0.5mm-1.0mm, the height of the clarifying tank is 15cm-20cm, and the clarifying tank opening size is 5mm-10mm.

[0017] Specifically, the zth micro-mixer is connected to the feed inlet of the zth clarifying tank through a feed pipeline, the heavy phase outlet of the nth clarifying tank is connected to a heavy phase outlet storage tank, and the light phase outlet of the first clarifying tank is connected to a light phase outlet storage tank.

[0018] Preferably, the continuous micro-extraction device with adjustable number of extraction units further comprises a liquid level control system, and the liquid level control system comprises an image acquisition module, a liquid level recognition module and a liquid level control module.

[0019] Further, the image acquisition module is used to collect images of the clarifying tanks, the images collected by the image acquisition module are transmitted to the liquid level recognition module, the liquid level recognition module performs preprocessing, edge recognition, liquid-liquid phase interface height calculation and gas-liquid phase interface height calculation on the images, and transmits the results to the liquid level control module, and the liquid level control module controls the flow rates of the heavy phase pump and the light phase pump based on the corresponding results, so as to realize closed-loop control of the continuous micro-extraction device with adjustable number of extraction units.

[0020] Specifically, remote communication is realized through a modbus TCP / IP protocol and an RS-485 to Ethernet server.

[0021] In the case that the liquid level control system is included, the working process of the continuous micro-extraction device with adjustable number of extraction units is as follows:

[0022] (1) Start-up stage: (a) starting the heavy phase pump through the extraction execution system, (b) automatically recognizing the liquid level height by the liquid level recognition system, (c) when the heavy phase height is greater than the height of the heavy phase outlet, the control system automatically starts the heavy phase pump of the previous unit, (d) until the heavy phase liquid flows into the heavy phase outlet storage tank, and the same operation is performed on the light phase liquid in sequence until the light phase liquid flows into the light phase outlet storage tank;

[0023] (2) Running stage: the liquid level control system ensures smooth running of the extraction process, the image acquisition module collects images, and the liquid level recognition module returns the phase interface height at regular time intervals, and during the running process, changes in the flow rate of the feed inlet or pump failure and the like will cause the phase interface height to deviate from the initial value, and the liquid level control module will automatically change the rotation speed of the corresponding pump of the previous unit / next unit according to the deviation;

[0024] (3) Shutdown stage: the heavy phase liquid and the light phase liquid are replaced with ethanol solvent, the pump is stopped after running at the original flow rate for 30-40 minutes, the remaining solvent in the device is emptied, and the extraction is completed.

[0025] Compared with the prior art, the continuous micro-extraction device with adjustable number of extraction units has the following advantages:

[0026] (1) The continuous micro-extraction device with adjustable number of extraction units can avoid the emulsification phenomenon in the multi-stage extraction process, improve the extraction efficiency, has high integration, and has good extraction effect.

[0027] The continuous micro-extraction equipment with adjustable extraction unit quantity can realize self-sensing, self-decision, self-adaptation and self-execution of a multi-stage continuous extraction process, automatically executes the multi-stage continuous extraction process, automatically senses the height of an extraction phase interface, adaptively adjusts inter-stage pump flow under the condition of feed flow variation, does not need manual operation, has high automation degree and saves labor. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structure diagram of the continuous countercurrent micro-extraction equipment with adjustable extraction unit quantity and a liquid level control system.

[0029] The drawing number: 1 is a heavy phase feed storage tank, 2 is a heavy phase discharge storage tank, 3 is a light phase feed storage tank, 4 is a light phase discharge storage tank, 51 is a first heavy phase pump, 52 is a second heavy phase pump, 53 is a third heavy phase pump, 61 is a first light phase pump, 62 is a second light phase pump, 63 is a third light phase pump, 71 is a first micro-mixer, 72 is a second micro-mixer, 73 is a third micro-mixer, 81 is a first clarifying tank, 82 is a second clarifying tank, and 83 is a third clarifying tank. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment 1

[0033] As shown in the drawing, Figure 1 a continuous micro-extraction equipment with adjustable extraction unit quantity includes: n-stage micro-extraction units and an extraction execution system, wherein n is 3 (the same below);

[0034] The n-stage micro-extraction unit comprises n micro-mixers (T-shaped or Y-shaped three-way structure), n clarifying tanks (cylindrical), a light phase feed storage tank 3, a heavy phase feed storage tank 1, a light phase discharge storage tank 4, a heavy phase discharge storage tank 2 and liquid pipelines; the clarifying tank comprises at least three openings on the side surface from bottom to top for feeding and discharging, the middle opening is a feeding port, the heavy phase discharge port is located at the lower end of the feeding port, and the light phase discharge port is located at the upper end of the feeding port;

[0035] The extraction execution system comprises n heavy phase pumps and n light phase pumps, the first heavy phase pump 51 is arranged on the liquid pipeline between the heavy phase feed storage tank 1 and the first clarifying tank 81, the second heavy phase pump 52 is arranged on the liquid pipeline between the first clarifying tank 81 and the second clarifying tank 82, the third heavy phase pump 53 is arranged on the liquid pipeline between the second clarifying tank 82 and the third clarifying tank 83, and the heavy phase discharge port of the third clarifying tank 83 is connected with the heavy phase discharge storage tank 2; the first light phase pump 61 is arranged on the liquid pipeline between the first clarifying tank 81 and the second clarifying tank 82, the second light phase pump 62 is arranged on the liquid pipeline between the second clarifying tank 82 and the third clarifying tank 83, and the third light phase pump 63 is arranged on the liquid pipeline between the third clarifying tank 83 and the light phase feed storage tank; the light phase discharge port of the first clarifying tank 81 is connected with the light phase discharge storage tank 4.

[0036] The pump outlet pipeline of the first heavy phase pump 51 is connected with the pump outlet pipeline of the first light phase pump 61 through the first micro-mixer 71, the pump outlet pipeline of the second heavy phase pump 52 is connected with the pump outlet pipeline of the second light phase pump 62 through the second micro-mixer 72, the pump outlet pipeline of the third heavy phase pump 53 is connected with the pump outlet pipeline of the third light phase pump 63 through the third micro-mixer 73, the first micro-mixer 71 is connected to the feeding port of the first clarifying tank 81 through a feeding pipeline, the second micro-mixer 72 is connected to the feeding port of the second clarifying tank 82 through a feeding pipeline, and the third micro-mixer 73 is connected to the feeding port of the third clarifying tank 83 through a feeding pipeline.

[0037] The continuous micro-extraction equipment with adjustable number of extraction units further comprises a liquid level control system, the liquid level control system comprises an image acquisition module, a liquid level recognition module and a liquid level control module, the image acquisition module is used for collecting images of the clarifying tanks, the images collected by the image acquisition module are transmitted to the liquid level recognition module, the liquid level recognition module performs preprocessing, edge recognition, liquid-liquid phase interface height calculation and gas-liquid phase interface height calculation on the images, and transmits the results to the liquid level control module, the liquid level control module controls the flow of the heavy phase pump and the light phase pump based on the corresponding results, and realizes closed-loop control of the continuous micro-extraction equipment with adjustable number of extraction units.

[0038] Example 2

[0039] Taking a three-stage continuous countercurrent micro-extraction as an example, the working process of the continuous micro-extraction equipment with adjustable number of extraction units is as follows:

[0040] (1)Start-up phase: (a) The extraction execution system automatically opens the first heavy phase pump 51 to pump the heavy phase feed into the first micro-mixer 71, and after passing through the first micro-mixer 71, the heavy phase feed reaches the first clarifying tank 81; (b) The liquid level control system returns the heavy phase liquid level in real time; (c) After the heavy phase liquid level is higher than the heavy phase outlet of the first clarifying tank, the extraction execution system automatically opens the second heavy phase pump 52 to pump the heavy phase feed into the second micro-mixer 72, and after passing through the second micro-mixer 72, the heavy phase feed reaches the second clarifying tank 82; (d) The liquid level control system returns the heavy phase liquid level in real time; (e) After the heavy phase liquid level is higher than the heavy phase outlet of the second clarifying tank 82, the extraction execution system automatically opens the third heavy phase pump 53 to pump the heavy phase feed into the third micro-mixer 73, and after passing through the third micro-mixer 73, the heavy phase feed reaches the third clarifying tank 83; (f) The liquid level control system returns the heavy phase liquid level in real time; (g) After the heavy phase liquid level is higher than the heavy phase outlet of the third clarifying tank, the heavy phase feed automatically flows into the heavy phase outlet storage tank 2; (h) The extraction execution system automatically opens the third light phase pump 63 to pump the light phase feed into the third micro-mixer 73, and after passing through the third micro-mixer 73, the light phase feed reaches the third clarifying tank 83; (i) The liquid level control system returns the light phase liquid level in real time; (j) After the light phase liquid level is higher than the light phase outlet of the third clarifying tank 83, the extraction execution system automatically opens the second light phase pump 62 to pump the light phase feed into the second micro-mixer 72, and after passing through the second micro-mixer 72, the light phase feed reaches the second clarifying tank 82; (k) The liquid level control system returns the light phase liquid level in real time; (l) After the light phase liquid level is higher than the light phase outlet of the second clarifying tank 82, the extraction execution system automatically opens the first light phase pump 61 to pump the light phase feed into the first micro-mixer 71, and after passing through the micro-mixer, the light phase feed reaches the first clarifying tank 81; (m) The liquid level control system returns the light phase liquid level in real time; (n) After the light phase liquid level is higher than the light phase outlet of the first clarifying tank 81, the light phase feed automatically flows into the light phase outlet storage tank 4.

[0041] (2)Running phase: The liquid level control system ensures smooth running of the extraction process, the image acquisition module collects clarifying tank images, the liquid level recognition module returns the phase interface height at regular intervals, and the extraction execution system automatically increases the heavy phase inlet flow during the running process, the liquid-liquid phase interface height is slowly higher than the initial value, and the liquid level control module automatically increases the speed of the heavy phase pump of the previous unit.

[0042] (3)Shutdown phase: The heavy phase feed and the light phase feed are replaced with ethanol solvent, the pumps are stopped after running at the original flow rate for 30-40 min, and the remaining solvent in the equipment is emptied.

[0043] The above-described embodiments have been described in detail for the technical solution of the present application, and it should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the present application. Any modification, supplement or similar replacement made within the principle range of the present application should be included in the protection range of the present application.

Claims

1. A continuous microextraction apparatus with adjustable number of extraction cells, characterized in that, The application relates to a continuous micro-extraction device with adjustable extraction unit quantity. The n-stage micro-extraction unit comprises n micro-mixers, n clarifying tanks, a light-phase feed storage tank, a heavy-phase feed storage tank, a light-phase discharge storage tank, a heavy-phase discharge storage tank and liquid pipelines. The extraction execution system comprises n heavy-phase pumps and n light-phase pumps. The pump-out pipeline of the zth heavy-phase pump is connected to the pump-out pipeline of the zth light-phase pump through the zth micro-mixer, and the zth micro-mixer is connected to the feed inlet of the zth clarifying tank through a feed pipeline. The micro-mixer is a T-shaped or Y-shaped three-way structure.

2. The continuous microextraction apparatus with adjustable number of extraction cells according to claim 1, wherein, The clarifying tank is a cylindrical shape.

3. The continuous microextraction apparatus with adjustable number of extraction cells according to claim 1, wherein, The inner diameter of the micro-mixer is 0.5-1.0 mm, the height of the clarifying tank is 15-20 cm, and the opening size of the clarifying tank is 5-10 mm.

4. The continuous microextraction apparatus with adjustable number of extraction cells according to claim 1, wherein, The zth micro-mixer is connected to the feed inlet of the zth clarifying tank through a feed pipeline, the heavy-phase discharge inlet of the nth clarifying tank is connected to the heavy-phase discharge storage tank, and the light-phase discharge inlet of the first clarifying tank is connected to the light-phase discharge storage tank.

5. The continuous microextraction apparatus with adjustable number of extraction cells according to claim 1, wherein, The continuous micro-extraction device with adjustable extraction unit quantity further comprises a liquid level control system.

6. The continuous microextraction apparatus of claim 1, wherein, The image acquisition module is used for collecting clarifying tank images, the images collected by the image acquisition module are transmitted to the liquid level recognition module, the liquid level recognition module performs pretreatment, edge recognition, liquid-liquid phase interface height calculation and gas-liquid phase interface height calculation on the images, and transmits the results to the liquid level control module.

7. The continuous microextraction apparatus of claim 1, wherein, The liquid level control module controls the flow of the heavy-phase pump and the light-phase pump based on the corresponding results, and realizes closed-loop control of the continuous micro-extraction device with adjustable extraction unit quantity.

8. The continuous microextraction apparatus with adjustable number of extraction cells according to claim 7, wherein, ​

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