Rapid organic matter extraction device of ultrasonic reinforced composite Soxhlet extractor

Abstract

An extraction bottle is arranged at the top of a distillation bottle of the device, a condensation pipe is installed at the top of the extraction bottle, a connecting pipe and a siphon pipe are arranged on the two sides of the extraction bottle and a connecting pipe, the section of the middle of the extraction bottle is rectangular, and a fluorescent scanner is arranged on one side of the extraction bottle; a supporting plate is arranged in an inner cavity of the extraction bottle, an ultrasonic generator and a sample extraction bag are sequentially arranged on the top surface of the supporting plate, a filter plate is arranged on the inner wall of the extraction bottle and above the sample extraction bag, the filter plate comprises a central plate block and an edge plate block, and a first cleaning block and a second cleaning block are symmetrically arranged on the bottom surface of the edge plate block; filter cloth with the tail ends connected with the side face of the center plate is arranged on the side faces of the first sweeping block and the second sweeping block, a waterproof driving motor with two output ends is arranged on the top face of the center plate, and the waterproof driving motor is in winding connection with the tail end of a traction rope connected with the second sweeping block through a roller shaft at the output end. According to the device, the possibility that impurities are mixed in a distillation finished product of the Soxhlet extractor is reduced, and the organic matter extraction quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of organic matter extraction, in particular to an ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device. Background Art

[0002] Currently, a variety of devices and equipment are available for extracting persistent organic pollutants from soil, including Soxhlet extractors, ultrasonic extractors, and rapid solvent extraction devices. Among these, Soxhlet extraction is a classic method widely used for extracting organic matter from soil samples. This device is relatively simple in structure and operation, and can fully extract organic matter from soil through multiple cycles of reflux. However, due to the need to control the reflux rate, multiple refluxes are required to achieve a good extraction effect, resulting in a long extraction process. Furthermore, a large amount of solvent is required during the extraction process, increasing costs and the environmental burden.

[0003] Chinese patent document CN219072129U discloses a Soxhlet extractor capable of reducing extract contamination. This extractor utilizes a filtering mechanism to address the problem of solid sediment or particulate dirt depositing at the bottom of the extraction tube during use, causing direct contact between the extract and the solid sediment or particulate dirt, leading to re-contamination of the extract. Furthermore, Chinese patent document CN207785998U discloses a Soxhlet extractor capable of preventing gas overflow, comprising a Soxhlet extractor equipped with an extraction flask, a steam pipe, a siphon tube, and an extraction tube. The extraction tube is connected to a condenser above which a gas filter tank is connected at its open end above the condenser. By adding a gas filter tank capable of adsorbing toxic gases to conventional Soxhlet extraction equipment, the filter tank serves to adsorb and remove toxic gases, thereby reducing the risk of toxic gases to the environment and operators.

[0004] However, the existing Soxhlet extractor fails to filter and intercept the liquid inlet of the siphon tube during operation, causing some solid particles in the extraction package to flow back into the distillation flask along with the solvent, resulting in impurities being mixed into the distilled product, seriously affecting the quality of organic matter extraction. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device. The device overcomes the defects of traditional Soxhlet extractors in organic matter extraction, improves the efficiency of organic matter extraction operations, saves costs, avoids environmental impact, reduces the possibility of impurities being mixed into the distilled product of the Soxhlet extractor, and improves the quality of organic matter extraction.

[0006] In order to solve the above technical problems, the present invention provides an ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device, comprising a distillation flask, the top of the distillation flask is connected to an extraction flask through a pipe, the top of the extraction flask is installed with a condenser, the extraction flask and the pipe are respectively provided with a connecting pipe and a siphon tube communicating with the inner cavity, the middle cross-section of the extraction flask is rectangular and a fluorescent scanner is provided on one side, the inner cavity of the extraction flask is provided with a support plate with a built-in through hole, the top surface of the support plate is provided with an ultrasonic generator, the top surface of the ultrasonic generator is provided with a sample extraction bag, and the inner wall of the extraction flask is provided with a through hole above the sample extraction bag. The filter plate includes a central plate and an edge plate located outside the periphery of the central plate. The bottom surface of the edge plate is provided with a symmetrically arranged first cleaning block and a second cleaning block through a reset spring. The sides of the first cleaning block and the second cleaning block are provided with filter cloths whose tail ends are connected to the side of the central plate. The side of the second cleaning block is provided with a traction rope. The first cleaning block and the second cleaning block are both slidably fitted on the bottom surface of the edge plate. The top surface of the central plate is provided with a waterproof drive motor with two output ends, and the two output ends of the waterproof drive motor are connected to rollers, and the two rollers are wrapped around the tail end of the traction rope.

[0007] Furthermore, the sample in the sample extraction package is combined with the fluorescent probe of the fluorescence scanner to form a fluorescent complex, and the sample extraction package is composed of two or three adjacent surrounding thin slice grids.

[0008] Furthermore, the interface between the siphon tube and the extraction bottle is located above the filter plate, and the filter hole size of the filter plate is smaller than the size of the built-in through hole of the support plate.

[0009] Furthermore, the inner wall of the extraction bottle is connected to the waterproof drive motor through a handle, and the waterproof drive motor is fixedly connected to the top surface of the center plate through a short rod. The bottom surface of the handle near the tail end is fixedly connected to a bracket, and the traction rope passes through the top of the edge plate and is wrapped around the surface of the bracket.

[0010] Furthermore, a microwave heater is provided on the outer surface of the distillation flask, and the fluorescence scanner is connected to the microwave heater signal.

[0011] Furthermore, the length of the first cleaning block matches the side length of the central plate, the length of the second cleaning block matches the side length of the edge plate, a guide rod is provided on the lower part of the surface of one side of the edge plate close to the central plate, and the width of the filter cloth matches the side length of the central plate, and the filter cloth is wrapped around the surface of the guide rod.

[0012] Furthermore, when the waterproof drive motor is reeled in, the traction rope drives the edge plate to rise through the second cleaning block until the edge plate is flush with the bottom surface of the center plate, and the first cleaning block and the second cleaning block are located at the outer edge of the edge plate.

[0013] Furthermore, the thickness of the central plate is greater than that of the edge plate, the central plate protrudes from the surface of the edge plate and is fixedly sleeved with a hoop, the bottom of the hoop is connected to a protective filter, and the bottom of the protective filter is fixedly connected to the top of the edge plate.

[0014] Furthermore, the inner circle of the protective filter is larger than the outer circle of the central plate, and the filtering size of the protective filter is not larger than the filtering size of the filter cloth. Since the ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device of the present invention adopts the above-mentioned technical solution, that is, the top of the distillation flask of the device is connected to the extraction flask through a connecting pipe, the top of the extraction flask is installed with a condenser, the extraction flask and the connecting pipe are respectively provided with a connecting pipe and a siphon tube connecting the inner cavity, the middle cross-section of the extraction flask is rectangular and a fluorescent scanner is provided on one side, the inner cavity of the extraction flask is provided with a support plate with a built-in through hole, the top surface of the support plate is sequentially provided with an ultrasonic generator and a sample extraction package, the inner wall of the extraction flask is provided with a filter plate above the sample extraction package, the filter plate includes a central plate and an edge plate, the bottom surface of the edge plate is provided with a symmetrically arranged first cleaning block and a second cleaning block, the side surfaces of the first cleaning block and the second cleaning block are provided with a filter cloth with a tail end connected to the side surface of the central plate, the top surface of the central plate is provided with two output ends of a waterproof drive motor, and the waterproof drive motor is wound around the tail end of the traction rope connected to the second cleaning block through the roller at the output end. The device overcomes the defects of traditional Soxhlet extractors for organic matter extraction, improves the efficiency of organic matter extraction operations, saves costs, avoids environmental impact, reduces the possibility of impurities being mixed into the finished product of the Soxhlet extractor distillation, and improves the quality of organic matter extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 Schematic diagram of the ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device of the present invention; Figure 2 This is a schematic diagram of the support plate, ultrasonic generator, and sample extraction package in the device; Figure 3 This is a schematic diagram of the filter plate arrangement in this device; Figure 4 A schematic diagram of the central plate and edge plate settings in this device; Figure 5 This is a schematic diagram of the filter cloth arrangement in this device; Figure 6 for Figure 5 A magnified schematic diagram of the middle part A; Figure 7 This is a schematic diagram of the edge plate descending relative to the center plate in this device; Figure 8 This is a schematic diagram of the arrangement of the hoop and protective filter in this device; Figure 9 This is a schematic diagram of the protective filter in this device descending along with the edge plate; Figure 10 This is a schematic diagram of the protective filter in this device before and after use; Figure 11 This is a schematic diagram of the process of the first cleaning block in this device cleaning the bottom surface of the edge plate. DETAILED DESCRIPTION

[0016] Implementation example Figures 1 to 4 As shown, the ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device of the present invention includes a distillation flask 1, the top of the distillation flask 1 is connected to an extraction flask 2 through a connecting pipe, the top of the extraction flask 2 is installed with a condenser 6, the extraction flask 2 and the connecting pipe are respectively provided with a connecting pipe 3 and a siphon 5 connecting the inner cavity, the middle cross-section of the extraction flask 2 is rectangular and a fluorescent scanner 4 is provided on one side, the inner cavity of the extraction flask 2 is provided with a support plate 9 with a built-in through hole, the top surface of the support plate 9 is provided with an ultrasonic generator 8, the top surface of the ultrasonic generator 8 is provided with a sample extraction package 7, the inner wall of the extraction flask 2 is provided with a filter plate 10 above the sample extraction package 7, and the filter plate 10 includes a central plate 101 The edge plate 102 is located outside the periphery of the center plate 101. The bottom surface of the edge plate 102 is provided with a symmetrically arranged first cleaning block 11 and second cleaning block 12 via a return spring 18. The sides of the first and second cleaning blocks 11 and 12 are provided with filter cloth 17, the tail ends of which are connected to the side of the center plate 101. The side of the second cleaning block 12 is provided with a traction rope 16. The first and second cleaning blocks 11 and 12 both slide and fit on the bottom surface of the edge plate 102. The top surface of the center plate 101 is provided with a waterproof drive motor 15 with two output ends. Both output ends of the waterproof drive motor 15 are connected to rollers, and the two rollers are wound around the tail ends of the traction rope 16. The filter cloth 17 is in the shape of a cross and can be fixed to the first and second cleaning blocks 11, 12, and edge plate 102 by gluing or other means. The first and second cleaning blocks 11 and 12 are respectively connected by the filter cloth 17 and the return spring 18, which serves to support and restrain the edge plate 102.

[0017] During distillation, the solvent in the distillation flask 1 evaporates due to heat, and the gas enters the condenser 6 through the connecting pipe 3. After condensation treatment, the vaporized solvent liquefies and drips on the bottom of the extraction flask 2, soaking and dissolving the sample in the sample extraction package 7, and performing cavitation effect through the ultrasonic generator 8, which can accelerate the release of organic matter and improve the extraction speed. After the liquid level in the extraction flask 2 rises to the inlet height of the siphon 5, the siphon 5 will return the soaked and dissolved liquid to the distillation flask 1. As the heating operation continues, the solvent will continue to condense in the form of gas. After the above-mentioned cycle operation, the combination of Soxhlet extraction and ultrasonic extraction method can be realized, which is highly efficient and specific. It can be optimized for specific types of organic matter, such as fats, oils, pesticide residues, environmental pollutants, etc., so that this device has broad application prospects and potential in the field of organic matter extraction.

[0018] In addition, since the sample has been subjected to fluorescence treatment, after the sample in the sample extraction package 7 is transferred to the distillation flask 1, the content of the fluorescent component in the liquid flowing back in the siphon tube 5 will be reduced to a set threshold value (there may be a small amount of residue, but it is within the allowable experimental error range). At this time, the heating of the distillation flask 1 is stopped, the extraction operation is stopped, and the extraction end point can be automatically determined, thereby realizing automation and improving efficiency.

[0019] Preferably, the sample in the sample extraction package 7 is combined with the fluorescent probe of the fluorescence scanner 4 to form a fluorescent complex, and the sample extraction package 7 is composed of two or three adjacent surrounding thin sheet grids.

[0020] During the extraction operation, the sample in the sample extraction package 7 is subjected to fluorescence treatment, and its deuterated indicator can also be converted into a fluorescent derivative by a chemical method.

[0021] Preferably, the interface between the siphon tube 5 and the extraction bottle 2 is located above the filter plate 10 , and the filter pore size of the filter plate 10 is smaller than the size of the built-in through hole of the support plate 9 .

[0022] Preferably, the inner wall of the extraction bottle 2 is connected to the waterproof drive motor 15 through a handle 14, and the waterproof drive motor 15 is fixedly connected to the top surface of the center plate 101 through a short rod 104. The bottom surface of the handle 14 near the tail end is fixedly connected to the bracket 13, and the traction rope 16 passes through the top of the edge plate 102 and is wrapped around the surface of the bracket 13.

[0023] Preferably, a microwave heater 105 is provided on the outer surface of the distillation flask 1, and the fluorescence scanner 4 is signal-connected to the microwave heater 105. The microwave heater 105 is used to heat the distillation flask 1 to evaporate the solvent. The fluorescence scanner 4 and the microwave heater 105 are linked by signals to start and end the extraction operation.

[0024] Preferably, Figure 5 and Figure 6 As shown, the length of the first cleaning block 11 matches the side length of the central plate 101, the length of the second cleaning block 12 matches the side length of the edge plate 102, and a guide rod 103 is provided on the lower part of the surface of the side of the edge plate 102 close to the central plate 101, and the width of the filter cloth 17 matches the side length of the central plate 101, and the filter cloth 17 is wrapped around the surface of the guide rod 103.

[0025] Preferably, when the waterproof drive motor 15 is reeled in, the traction rope 16 drives the edge plate 102 to rise through the second cleaning block 12 until the edge plate 102 is flush with the bottom surface of the center plate 101, and the first cleaning block 11 and the second cleaning block 12 are located at the outer edge of the edge plate 102.

[0026] During the extraction process, due to the release of a small amount of solid particles in the sample extraction package 7 and the subsequent siphon backflow into the siphon tube 5, the extraction contamination is caused. The filter cloth 17 made of non-elastic material in the present device is in a stretched state when the first cleaning block 11 and the second cleaning block 12 are in the edge state.

[0027] When the filter plate 10 is not clogged, the soaking solution in the sample extraction package 7 below the filter plate 10 can be intercepted and filtered. During siphoning, the released solid particles can be intercepted to prevent possible blockage of the siphon tube 5 and subsequent extraction contamination.

[0028] When the filter plate 10 is clogged, the waterproof drive motor 15 rotates to release the traction rope 16 on the roller surface. Under the gravity of the edge plate 102, the edge plate 102 drops down automatically. At the same time, the filter cloth 17 is pulled by the guide rod 103 to block the gap space between the edge plate 102 and the surface of the center plate 101 caused by the drop of the edge plate 102, ensuring that the filtration space is maintained. As the edge plate 102 drops, the first cleaning block 11 and the second cleaning block 12 gradually approach each other under the pull of the filter cloth 17 (as shown in FIG. Figure 7 and Figure 11 As shown, in Figure 11 For ease of understanding, the gap between the edge plate 102 and the center plate 101 is enlarged), which can clean the blockage at the bottom of the edge plate 102. During the subsequent resetting and rising process of the edge plate 102, under the resetting action of the resetting spring 18, the first cleaning block 11 and the second cleaning block 12 are able to return to their original positions and play a corresponding pulling role on the filter cloth 17, waiting for the next round of cleaning operation.

[0029] In the initial state, the second cleaning block 12 is located at the edge of the edge plate 102 (eg Figure 4As shown), at this time, the waterproof drive motor 15 is in a tightened state, and the second cleaning block 12 is used to lift the edge plate 102; then the waterproof drive motor 15 begins to release, and the lifting effect of the second cleaning block 12 on the edge plate 102 begins to fail, and the edge plate 102 begins to fall by itself. During the falling process, the filter cloths 17 on the four sides of the edge plate 102 respectively pull the connected first cleaning block 11 and the second cleaning block 12. The working principle is as follows Figure 11 As shown, when the second cleaning blocks 12 move closer to each other, the waterproof drive motor 15 is reeling in. After the second cleaning block 12 moves to the side end of the edge plate 102, it continues to reel in, and the edge plate 102 can be pulled up. At this time, the filter cloth 17 is also in a tightened state.

[0030] Due to the size design of the first cleaning block 11 and the second cleaning block 12 , the first cleaning block 11 and the second cleaning block 12 can effectively clean the bottom of the filter plate 10 when they are close to each other.

[0031] When the edge plate 102 is subsequently reset, the waterproof drive motor 15 rotates in the opposite direction to perform a reeling operation, which can drive the edge plate 102 to move upward. During this process, the first cleaning block 11 and the second cleaning block 12 return to the edge of the edge plate 102 under the action of the reset spring 18 (because the two ends of the reset spring 18 are respectively connected to the bottom of the edge plate 102 and the side surface of the first cleaning block 11 and the second cleaning block 12 facing away from the filter cloth 17).

[0032] Preferably, Figure 7 、 Figure 8 and Figure 9 As shown, the thickness of the central panel 101 is greater than that of the edge panel 102. The central panel 101 protrudes from the surface of the edge panel 102 and is fixedly sleeved with a hoop 19. The bottom of the hoop 19 is connected to a protective filter 20, and the bottom of the protective filter 20 is fixedly connected to the top of the edge panel 102.

[0033] Preferably, the inner circle of the protective filter screen 20 is larger than the outer circle of the central plate 101 , and the filtering size of the protective filter screen 20 is not larger than the filtering size of the filter cloth 17 .

[0034] When the edge plate 102 descends, the intersections of the ends of the filter cloths 17 enclosed by the four rectangles are not constrained connections, so there may be gaps, resulting in poor filtering effects.

[0035] When the edge plate 102 descends, the protective filter screen 20 descends synchronously, which can play a corresponding enclosure role for the inner filter cloth 17, without affecting the lifting and lowering of the filter cloth 17, and can also maintain the gaps that may exist at the intersection of the filter cloth 17 in four directions, thereby ensuring the overall filtering effect of the filter plate 10, thereby avoiding the blockage of the siphon tube 5 and the subsequent extraction quality (such as Figure 9 and Figure 10 shown).

[0036] In summary, the present application generates a cavitation effect through an ultrasonic generator 8 to accelerate the release of organic matter, and automatically determines the extraction endpoint through changes in fluorescence intensity, triggering the cessation of heating, and changes the sample extraction package 7 from a classic extraction filter paper barrel to a closed grid, generally two or three surrounding thin slice grids, to increase the solvent contact area, thereby improving the extraction efficiency. In addition, the dynamic adjustment of the filter plate 10 is used to take into account the anti-blocking of the siphon tube 5, the extraction quality, and the continuous use of the filter plate 10. When the filter plate 10 is blocked, the upper and lower drop differences between the edge plate 102 and the center plate 101 can be used to drive the first cleaning block 11 and the second cleaning block 12 to clean the bottom of the edge plate 102. The protective filter screen 20 is used to fill the gap when the filter plate 10 is raised and lowered to ensure continuous filtration, reduce the possibility of impurities being mixed into the finished product of the Soxhlet extractor distillation, and improve the quality of organic matter extraction.

Claims

1. An ultrasonically enhanced composite Soxhlet extractor for rapid organic matter extraction, comprising a distillation flask, the top of which is connected to an extraction flask via a connecting pipe, a condenser mounted on the top of the extraction flask, and a connecting pipe and a siphon connected to the inner cavity of the extraction flask and the connecting pipe, respectively. The invention is characterized in that: The middle cross-section of the extraction bottle is rectangular and a fluorescent scanner is provided on one side. The inner cavity of the extraction bottle is provided with a support plate with a built-in through hole, the top surface of the support plate is provided with an ultrasonic generator, the top surface of the ultrasonic generator is provided with a sample extraction package, and the inner wall of the extraction bottle is provided with a filter plate above the sample extraction package. The filter plate includes a central plate and an edge plate located outside the periphery of the central plate. The bottom surface of the edge plate is provided with a symmetrically arranged first cleaning block and a second cleaning block through a reset spring. The sides of the first cleaning block and the second cleaning block are provided with a filter cloth whose tail end is connected to the side of the central plate, and the side of the second cleaning block is provided with a traction rope. The first cleaning block and the second cleaning block are both slidably fitted on the bottom surface of the edge plate. The top surface of the central plate is provided with a waterproof drive motor with two output ends, and the two output ends of the waterproof drive motor are connected to rollers, and the two rollers are wrapped around the tail end of the traction rope.

2. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1, characterized in that: The sample in the sample extraction package is combined with the fluorescent probe of the fluorescence scanner to form a fluorescent complex, and the sample extraction package is composed of two or three adjacent surrounding thin slice grids.

3. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1 or 2, characterized in that: The interface position between the siphon tube and the extraction bottle is located above the filter plate, and the filter hole size of the filter plate is smaller than the size of the built-in through hole of the support plate.

4. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 3, characterized in that: The inner wall of the extraction bottle is connected to the waterproof drive motor through a handle, and the waterproof drive motor is fixedly connected to the top surface of the center plate through a short rod. The bottom surface of the handle near the tail end is fixedly connected to a bracket, and the traction rope passes through the top of the edge plate and is wrapped around the surface of the bracket.

5. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1, characterized in that: A microwave heater is provided on the outer surface of the distillation flask, and the fluorescence scanner is connected to the microwave heater signal.

6. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1, characterized in that: The length of the first cleaning block matches the side length of the central plate, the length of the second cleaning block matches the side length of the edge plate, a guide rod is provided on the lower part of the surface of the edge plate close to the central plate, and the width of the filter cloth matches the side length of the central plate, and the filter cloth is wrapped around the surface of the guide rod.

7. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1, characterized in that: When the waterproof drive motor is reeled in, the traction rope drives the edge plate to rise through the second cleaning block until the edge plate is flush with the bottom surface of the center plate, and the first cleaning block and the second cleaning block are located at the outer edge of the edge plate.

8. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 1, characterized in that: The thickness of the central plate is greater than that of the edge plate. The central plate protrudes from the surface of the edge plate and is fixedly sleeved with a hoop. The bottom of the hoop is connected to a protective filter screen, and the bottom of the protective filter screen is fixedly connected to the top of the edge plate.

9. The ultrasonic enhanced composite Soxhlet extractor rapid organic matter extraction device according to claim 8, characterized in that: The inner circle of the protective filter is larger than the outer circle of the central plate, and the filtering size of the protective filter is not larger than the filtering size of the filter cloth.

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