A fully automatic liquid-liquid extractor

Abstract

The utility model relates to liquid-liquid extraction technical field especially, relate to a kind of full-automatic liquid-liquid extractor.It includes base, extraction component and cleaning component;Extraction component includes sample storage tank, extraction bottle and the oscillation structure of driving the extraction bottle reciprocating motion along vertical direction;The sample inlet of the extraction bottle is communicated with the sample storage tank by sample inlet tube and first pressure pump;The cleaning component includes cleaning tank and filter tank, and further include the liquid inlet tube of communicating the cleaning liquid inlet and cleaning tank, the liquid outlet tube of communicating the cleaning liquid outlet and filter tank, the back liquid pipe of communicating the cleaning tank and filter tank, and for driving the second pressure pump of cleaning liquid flow between cleaning tank, extraction bottle and filter tank;The sample inlet tube, liquid inlet tube and liquid outlet tube all include universal bamboo joint hose part.The utility model can realize the whole process of sample supply, oscillation, cleaning in extraction work, especially suitable for carrying out water petroleum hydrocarbon sample extraction.

Description

Technical Field

[0001] This utility model relates to the field of liquid-liquid extraction technology, and in particular to a fully automatic liquid-liquid extraction instrument. Background Technology

[0002] Extraction refers to the process of transferring a compound from one solvent to another by utilizing the difference in solubility or partition coefficient between two immiscible (or slightly soluble) solvents. Through repeated extractions, the majority of the compound is extracted. Extraction is also known as solvent extraction or liquid-liquid extraction (to distinguish it from solid-liquid extraction, i.e., leaching), and is commonly used in the petroleum refining industry. It is a mass transfer separation process that uses a liquid extractant to treat immiscible two- or multi-component solutions to achieve component separation. It is a widely used unit operation.

[0003] Liquid-liquid extraction commonly employs a separatory funnel for sample extraction and separation. During the extraction process, the required volumes of sample and extraction solvent are pre-measured using a graduated cylinder and transferred separately to the separatory funnel. After shaking and extraction for a certain time, the mixture is allowed to stand until the two phases separate, and the lower organic phase is collected. Specifically, when extracting petroleum hydrocarbon samples from water, multiple extractions are often necessary due to the large sample volume. Existing liquid-liquid extraction devices suffer from several drawbacks: the separatory funnel must be removed and replaced for each batch of sample extraction; leakage occurs at the lower stopper when the separatory funnel is inverted and shaken; and when the same sample is extracted multiple times, the steps of removing the separatory funnel, adding solvent, replacing it, separating the layers, and collecting the extract must be repeated continuously.

[0004] Patent document CN223221007U discloses a liquid-liquid extraction device, comprising: a support base with a drive mechanism embedded therein; a platform plate positioned above the support base and connected to the drive mechanism for reciprocating motion; a support frame fixedly positioned above the platform plate, with its orientation parallel to the reciprocating motion direction of the platform plate, the support frame having a tilting beam rotatably connected to the support frame at both ends; and an extraction container fixedly connected to the tilting beam, the extraction container having a tail pipe connected to its inner cavity, the tail pipe having a switching valve. During extraction, the two phases separate vertically, but this prior art uses a horizontal reciprocating motion to oscillate. This motion method is insufficient to effectively "turn up" the bottom liquid and fully mix it with the upper liquid, mainly causing the two phases to slide horizontally as a whole. The shearing and tearing effects between the interfaces are weak, failing to form a large number of tiny droplets, thus significantly reducing mass transfer efficiency and resulting in low extraction efficiency. Utility Model Content

[0005] This invention aims to solve the above problems by providing a fully automatic liquid-liquid extraction instrument with high extraction efficiency.

[0006] The technical solution of this utility model is to provide a fully automatic liquid-liquid extraction instrument, including a base, an extraction component and a cleaning component disposed on the base; the extraction component includes a sample storage box, an extraction bottle, and an oscillating structure for driving the extraction bottle to reciprocate vertically; the extraction bottle is provided with a sample inlet, an extraction port, a cleaning liquid inlet and a cleaning liquid outlet; the sample inlet is connected to the sample storage box through a sample inlet tube and a first pressure pump, and the sample inlet is provided with a solenoid valve; the cleaning component includes a cleaning box and a filter box, the cleaning box, the extraction bottle and the filter box are connected through a circulation pipeline, the circulation pipeline includes an inlet pipe connecting the cleaning liquid inlet and the cleaning box, an outlet pipe connecting the cleaning liquid outlet and the filter box, a return pipe connecting the cleaning box and the filter box, and a second pressure pump for driving the cleaning liquid to flow between the cleaning box, the extraction bottle and the filter box; the sample inlet tube, the inlet tube and the outlet tube all include a universal flexible tube.

[0007] As a preferred embodiment of this utility model, the base is provided with a first support; the oscillation structure includes a vertical guide portion disposed on the first support, a slider slidably disposed on the vertical guide portion, and a lifting component for driving the slider to slide along the vertical guide portion, and the extraction bottle is connected to the slider.

[0008] As a preferred embodiment of this invention, at least two first supports are provided, and the two opposite sides of the extraction bottle are respectively connected to sliders slidably disposed on the two first supports.

[0009] As a preferred embodiment of this invention, the extraction bottle is provided with horizontal connecting shafts on its two opposite sides, and the two connecting shafts are rotatably connected to the two sliders respectively.

[0010] As a preferred embodiment of this utility model, the vertical guide portion is a vertical sliding hole; the slider includes abutting portions that abut against two sides opposite to the first bracket, and a connecting portion that passes through the vertical sliding hole to connect the two abutting portions, and the connecting shaft is rotatably connected to both abutting portions.

[0011] As a preferred embodiment of this utility model, each of the connecting shafts is hollow inside to form a conduit portion. One end of the conduit portion of one connecting shaft is connected to the cleaning fluid inlet, and the other end is connected to the inlet pipe through a rotary joint. One end of the conduit portion of the other connecting shaft is connected to the cleaning fluid outlet, and the other end is connected to the outlet pipe through a rotary joint.

[0012] As a preferred embodiment of this utility model, both the inlet pipe and the outlet pipe further include a rigid pipe section, one end of which is connected to the universal bamboo joint flexible hose section, and the other end is connected to the conduit section through the rotary joint; the base is also provided with a second bracket, and the rigid pipe section is slidably disposed on the second bracket in the vertical direction.

[0013] As a preferred embodiment of this invention, it further includes a driving component for driving the connecting shaft to rotate.

[0014] As a preferred embodiment of this invention, the base is provided with an extract collection tank.

[0015] As a preferred embodiment of this invention, the sample storage box is connected to the cleaning box and the filter box, respectively.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model provides a liquid-liquid extraction instrument, which facilitates continuous sample extraction by setting a sample storage box connected to the extraction bottle, improves extraction efficiency by driving the extraction bottle to reciprocate vertically, facilitates post-extraction cleaning by setting a cleaning component connected to the extraction bottle, and ensures communication between the extraction bottle, sample storage box, and cleaning component while adapting to the movement of the extraction bottle. This realizes the entire process of sample supply, shaking, and cleaning during extraction, and is especially suitable for extracting petroleum hydrocarbon samples from water.

[0018] 2. In some embodiments, a connecting shaft is provided to facilitate the inversion of the extraction flask. When inverted, the heavy phase can be thrown to the top and the light phase to the bottom, forcing the two phases to penetrate each other, thereby improving mass transfer efficiency and extraction efficiency. Attached Figure Description

[0019] Figure 1 This is a top view of a fully automated liquid-liquid extraction instrument;

[0020] Figure 2 This is a schematic diagram of one embodiment of a fully automated liquid-liquid extraction instrument;

[0021] Figure 3 This is a schematic diagram of another embodiment of a fully automated liquid-liquid extraction instrument;

[0022] Figure 4 This is a structural diagram of another embodiment of a fully automated liquid-liquid extraction instrument;

[0023] Figure 5 This is a schematic diagram of the installation of the first support and slider in a fully automated liquid-liquid extraction instrument;

[0024] Figure 6 This is a schematic diagram of the slider in a fully automated liquid-liquid extraction instrument;

[0025] In the diagram: base 1, first support 11, second support 12, extract collection tank 13, sample storage box 21, extraction bottle 22, sample inlet 221, extraction port 222, cleaning solution inlet 223, cleaning solution outlet 224, connecting shaft 225, oscillation structure 23, vertical guide 231, slider 232, lifting component 233, cleaning box 31, filter box 32, universal bamboo joint flexible hose 41, rigid tube 42. Detailed Implementation

[0026] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] Example 1

[0028] A fully automated liquid-liquid extraction instrument, such as Figure 1 As shown in the top view, it includes a base 1, an extraction assembly and a cleaning assembly disposed on the base 1. The term "fully automatic" in this invention refers to the fact that the sample introduction, shaking, and cleaning operations of the extractor can be controlled by an electric mechanism.

[0029] The base 1 is used to mount the extraction component and the cleaning component, and integrates the extraction component and the cleaning component into one unit. In some embodiments, the bottom of the base 1 is provided with casters with a braking structure, which facilitates the movement of the extractor to the required location for operation. Such casters with braking structures can adopt existing technology, which will not be described in detail here.

[0030] The extraction assembly is the main structure of the extraction instrument, and it first includes the extraction flask 22, such as... Figure 2 As shown, the extraction bottle 22 has a sample inlet 221 at the top and an extraction port 222 at the bottom. In use, the sample enters the extraction bottle 22 through the sample inlet 221. After standing and allowing the sample to separate into layers, the extraction port 222 is opened to collect the extracted sample from the lower layer. In some embodiments, the base 1 has an extraction liquid collection tank 13 corresponding to the extraction port 222, used to collect the extraction liquid or to hold a container for collecting the extraction liquid.

[0031] To improve extraction efficiency, the extraction flask 22 is typically vibrated. Therefore, the extraction assembly also includes a vibrating structure 23 that drives the extraction flask 22 to reciprocate vertically. The movement of the extraction flask 22 in the stratification direction forces the two phases to interpenetrate, improving mass transfer efficiency. Figure 2 As shown, a vertical first bracket 11 is fixedly installed on the base 1 to assist in the installation of the oscillation structure 23. The oscillation structure 23 firstly includes a vertical guide portion 231 disposed on the first bracket 11, such as... Figure 5As shown, a vertical guide portion 231 is formed by opening a vertical through hole in the first bracket 11 along its length. The solid portions at both ends of the through hole along its length form stop portions that limit the movement distance. Next, a slider 232 is provided on the vertical guide portion 231, such as... Figure 5 and Figure 6 As shown, the slider 232 includes abutting portions that abut against two sides opposite to the first bracket 11, and connecting portions that pass through the vertical guide portion 231 to connect the two abutting portions. The two abutting portions are connected by two connecting portions, which are arranged vertically upwards and downwards. The distance between the two connecting portions is greater than the width of the vertical guide portion 231 to prevent the slider 232 from rotating. Based on this, the slider 232 can slide along the vertical guide portion 231 on the first bracket 11. Figure 2 As shown, the extraction bottle 22 is then connected to the contact portion of the slider 232, allowing the extraction bottle 22 to slide vertically along the vertical guide portion 231. Finally, the oscillation structure 23 also includes a lifting component 233, which can be a cylinder or hydraulic cylinder. Its main body is mounted on the base 1, and the extension and retraction direction of the piston rod is parallel to the length direction of the vertical guide portion 231. By connecting the contact portion of the slider 232 to the piston rod, the slider 232 can drive the extraction bottle 22 to reciprocate vertically under the action of the piston rod, thus completing the oscillation. In some embodiments, such as... Figure 2 As shown, at least two first supports 11 are provided, and the two opposite sides of the extraction bottle 22 are respectively connected to the sliders 232 that are slidably provided on the two first supports 11, thereby improving the stability of the reciprocating movement of the extraction bottle 22.

[0032] Because the extraction flask 22 has a limited capacity, the amount of sample that can be extracted at one time is limited. When extracting a large number of samples, the operator needs to continuously add sample through the injection port 221, shake the extraction, and collect the sample through the extraction port 222, which presents a complex operational problem. Therefore, if Figure 1 As shown, the extraction assembly also includes a sample storage tank 21 for storing a large number of samples; the inlet 221 of the extraction bottle 22 is connected to the sample storage tank 21 via an injection tube and a first pressure pump; the inlet 221 is equipped with a solenoid valve. After each extraction, the extract and waste liquid are discharged sequentially, the solenoid valve and the first pressure pump are opened to directly inject the sample to be extracted from the sample storage tank 21 into the extraction bottle 22, and then the solenoid valve and the first pressure pump are closed. Agitation extraction can continue, saving the operator the trouble of removing the extraction bottle 22, adding the sample to the extraction bottle 22, and installing the extraction bottle 22.

[0033] Since the extraction bottle 22 reciprocates vertically and the sample storage box 21 is fixed on the base 1, the distance between the inlet 221 of the extraction bottle 22 and the outlet of the sample storage box 21 will change during vibration. Therefore, the inlet tube used to connect the extraction bottle 22 and the sample storage box 31 includes at least one section of universal bamboo-joint flexible hose 41. The universal bamboo-joint flexible hose 41 is a prior art technology and has the feature that its length and direction can be adjusted at will to adapt to different distances between the extraction bottle 22 and the sample storage box 31.

[0034] After extraction is complete, extraction flask 22 also needs to be cleaned, such as... Figure 1 and Figure 2 As shown, a cleaning liquid inlet 223 and a cleaning liquid outlet 224 are respectively provided on the left and right sides of the extraction bottle 22. Both the cleaning liquid inlet 223 and the cleaning liquid outlet 224 are equipped with solenoid valves. The cleaning assembly mounted on the base 1 includes a cleaning tank 31 and a filter tank 32. The cleaning tank 31 stores the cleaning liquid, such as pure water. The filter tank 32 can be activated carbon filtration, RO membrane filtration, etc. The cleaning tank 31, the extraction bottle 22, and the filter tank 32 are connected by a circulation pipeline. The circulation pipeline includes an inlet pipe connecting the cleaning liquid inlet 223 and the cleaning tank 31, an outlet pipe connecting the cleaning liquid outlet 224 and the filter tank 32, a return pipe connecting the cleaning tank 31 and the filter tank 32, and a second pressure pump for driving the cleaning liquid to flow between the cleaning tank 31, the extraction bottle 22, and the filter tank 32. In use, under the action of the second pressure pump, the cleaning solution enters the extraction bottle 22 from the cleaning tank 31 and then flows into the filter tank 32, completing one cleaning of the extraction bottle 22. After filtration by the filter tank 32, the relatively pure cleaning solution returns to the cleaning tank 31 for the next cleaning of the extraction bottle 22. In the embodiment where the filter tank 32 uses an RO membrane, the RO membrane filtration structure includes a pure water inlet, a clean water outlet, and a wastewater outlet. The liquid outlet pipe is connected to the raw water inlet, the liquid return pipe is connected to the clean water outlet, and the wastewater outlet is used to discharge wastewater. In this case, the cleaning tank 31 should also be equipped with a water replenishment port to replenish the pure water used for cleaning in a timely manner.

[0035] Similarly, since the extraction bottle 22 reciprocates vertically, and the washing box 31 and the filter box 32 are fixed on the base 1, the distance between the extraction bottle 22 and the washing box 31 and the filter box 32 will change during vibration. Therefore, the inlet pipe and outlet pipe used to connect the extraction bottle 22 and the washing box 31 and the filter box 32 also include at least one section of universal bamboo joint flexible hose 41 to adapt to the different distances between the extraction bottle 22 and the washing box 31 and the filter box 32.

[0036] In some embodiments, the cleaning box 31, the sample storage box 21, and the filter box 32 are connected in sequence and equipped with a third pressure pump to clean the sample storage box 21 after all extraction is completed.

[0037] Example 2

[0038] This embodiment is basically the same as embodiment 1, except that in this embodiment, the extraction bottle 22 can be flipped.

[0039] like Figure 3 As shown, horizontal connecting shafts 225 are provided on opposite sides of the extraction flask 22. The two connecting shafts 225 are rotatably connected to the contact parts of the two sliders 232 via rotating bearings. Tilting the flask 22 throws the heavy phase to the top and the light phase to the bottom, forcing the two phases to penetrate each other, improving mass transfer efficiency and extraction efficiency.

[0040] Meanwhile, during the shaking extraction process, solvent evaporation and temperature rise may increase the pressure inside the extraction bottle 22. By flipping the extraction bottle 22 so that the extraction port 222 faces upward, the extraction port 222 can be opened and used as an exhaust port to release pressure.

[0041] In some embodiments, a drive component is also included for rotating the connecting shaft 225. The drive component can be a handle disposed on the connecting shaft 225, manually driving the extraction bottle 22 to rotate; or it can be a motor, electrically driving the extraction bottle 22 to rotate. In electrically driven embodiments, since the extraction bottle 22 also needs to move vertically, therefore... Figure 4 As shown, a cylinder with a piston rod that moves synchronously with the lifting component 233 will be added to the base 1. The motor body is mounted on the piston rod of the cylinder and is slidably connected to the vertical sliding part 231 of the first bracket 11. The connecting shaft 225 and the motor output shaft can be driven by a chain transmission structure.

[0042] In some embodiments, the connecting shaft 225, the cleaning fluid inlet 223, and the cleaning fluid outlet 224 can be integrated. For example... Figure 3 As shown, each connecting shaft 225 is hollow to form a conduit section. One end of the conduit section of one connecting shaft 225 is connected to the cleaning fluid inlet 223, and the other end is connected to the inlet pipe for communication with the cleaning tank 31 via a rotary joint. One end of the conduit section of the other connecting shaft 225 is connected to the cleaning fluid outlet 224, and the other end is connected to the outlet pipe for communication with the filter tank 32 via a rotary joint. Specifically, the inlet pipe sequentially includes the aforementioned universal bamboo-joint flexible hose section 41 and a rigid pipe section 42. The rigid pipe section 42 is equipped with a rotary joint, and the conduit section is connected to the rotary joint. Similarly, the outlet pipe sequentially includes the aforementioned universal bamboo-joint flexible hose section 41 and a rigid pipe section 42. The rigid pipe section 42 is equipped with a rotary joint, and the conduit section is connected to the rotary joint. The rotary joint is a commonly used pipe connection device in the prior art, which allows the connected pipes to rotate relative to each other.

[0043] To improve the stability of the rotation of the conduit section relative to the rigid tube section 42, the base 1 is also provided with a second support 12. The rigid tube section 42 is slidably disposed on the second support 12 in the vertical direction. Specifically, a vertical sliding hole can be provided in the second support 12. The horizontal cross-section of the vertical sliding hole is T-shaped, including a wide part with a larger diameter and a narrow part with a smaller diameter. The body of the rigid tube section 42 passes through the wide part of the vertical sliding hole. A protrusion is also provided on the side wall of the rigid tube section 42. The protrusion is inserted into the narrow part of the vertical sliding hole to stop the rotation of the rigid tube section 42.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A fully automated liquid-liquid extraction apparatus, characterized in that: Includes a base (1), an extraction component and a cleaning component disposed on the base (1); The extraction assembly includes a sample storage box (21), an extraction bottle (22), and an oscillating structure (23) that drives the extraction bottle (22) to reciprocate in the vertical direction; the extraction bottle (22) is provided with a sample inlet (221), an extraction port (222), a cleaning solution inlet (223), and a cleaning solution outlet (224); the sample inlet (221) is connected to the sample storage box (21) through a sample inlet tube and a first pressure pump, and the sample inlet (221) is provided with a solenoid valve; The cleaning assembly includes a cleaning tank (31) and a filter tank (32). The cleaning tank (31), the extraction bottle (22), and the filter tank (32) are connected by a circulation pipe. The circulation pipe includes an inlet pipe connecting the cleaning liquid inlet (223) and the cleaning tank (31), an outlet pipe connecting the cleaning liquid outlet (224) and the filter tank (32), a return pipe connecting the cleaning tank (31) and the filter tank (32), and a second pressure pump for driving the cleaning liquid to flow between the cleaning tank (31), the extraction bottle (22), and the filter tank (32). The sample inlet tube, liquid inlet tube, and liquid outlet tube all include a universal bamboo-joint flexible hose section (41).

2. The fully automated liquid-liquid extraction apparatus according to claim 1, characterized in that: The base (1) is provided with a first support (11); the oscillation structure (23) includes a vertical guide (231) disposed on the first support (11), a slider (232) slidably disposed on the vertical guide (231), and a lifting member (233) for driving the slider (232) to slide along the vertical guide (231), and the extraction bottle (22) is connected to the slider (232).

3. The fully automated liquid-liquid extraction apparatus according to claim 2, characterized in that: At least two first supports (11) are provided, and the two opposite sides of the extraction bottle (22) are respectively connected to sliders (232) that are slidably disposed on the two first supports (11).

4. The fully automated liquid-liquid extraction apparatus according to claim 3, characterized in that: The extraction bottle (22) has horizontal connecting shafts (225) on its two opposite sides, and the two connecting shafts (225) are rotatably connected to the two sliders (232).

5. The fully automated liquid-liquid extraction apparatus according to claim 4, characterized in that: The vertical guide part (231) is a vertical sliding hole; the slider (232) includes abutting parts that abut against the two sides opposite to the first bracket (11) respectively, and a connecting part that passes through the vertical sliding hole to connect the two abutting parts, and the connecting shaft (225) is rotatably connected to both abutting parts.

6. The fully automated liquid-liquid extraction apparatus according to claim 5, characterized in that: The connecting shafts (225) are all hollow inside to form a conduit. One end of the conduit of one connecting shaft (225) is connected to the cleaning fluid inlet (223), and the other end is connected to the inlet pipe through a rotary joint. One end of the conduit of the other connecting shaft (225) is connected to the cleaning fluid outlet (224), and the other end is connected to the outlet pipe through a rotary joint.

7. The fully automated liquid-liquid extraction apparatus according to claim 6, characterized in that: Both the inlet pipe and the outlet pipe include a rigid pipe section (42), one end of which is connected to the universal bamboo joint hose section (41), and the other end is connected to the conduit section through the rotary joint; the base (1) is also provided with a second bracket (12), and the rigid pipe section (42) is slidably disposed on the second bracket (12) in the vertical direction.

8. The fully automated liquid-liquid extraction apparatus according to claim 4, characterized in that: It also includes a drive unit for driving the connecting shaft (225) to rotate.

9. The fully automated liquid-liquid extraction apparatus according to claim 1, characterized in that: The base (1) is provided with an extract collection tank (13).

10. The fully automated liquid-liquid extraction apparatus according to claim 1, characterized in that: The sample storage box (21) is connected to the cleaning box (31) and the filter box (32), respectively.

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