A continuous counter-current extraction apparatus for the extraction of natural flavours

Abstract

The utility model belongs to the field of spice extraction, especially a kind of continuous countercurrent extraction device of natural spice extraction, in view of the low solid-liquid mixing efficiency in the prior art, and volatile component serious problem of dispersing, present and propose the following scheme, it includes herringbone's extraction pipe, the bottom fixed sleeve of extraction pipe is equipped with condenser pipe, one end of extraction pipe is fixedly connected with the feeding tank of intercommunication, the other end of extraction pipe is fixedly connected with the outlet slag pipe of intercommunication, the lower fixed mounting of outlet slag pipe is equipped with collection tank, in the utility model, through motor drive gear rack meshing, reciprocating movement is promoted piston, dynamic extrusion is carried out to spice, so that the particle size of spice is less than 2mm, prevent the non-uniformity of particle size during transfer and produce accumulation, improve solid-liquid mixing efficiency, furthermore, through the cooling water of 15-25 ℃ from condenser pipe circulation, through pipe wall exchange heat, maintain the temperature constant in extraction pipe, prevent heat-sensitive component volatilization.

Description

Technical Field

[0001] This utility model relates to the field of fragrance extraction, and in particular to a continuous countercurrent extraction device for extracting natural fragrances. Background Technology

[0002] Currently, countercurrent extraction equipment for spices mainly adopts two types of technical solutions. Single-stage countercurrent extraction devices, using a single extraction chamber with a spiral feeding structure, can achieve basic mass transfer, but are limited by insufficient residence time, resulting in an extraction rate of less than 40% for active ingredients in raw materials with dense cell walls. Furthermore, solvent consumption is as high as 8-10 times the mass of the raw material. Multi-stage series extraction devices, while improving the extraction rate by transferring material between multiple independent extraction units, have the following drawbacks:

[0003] Low solid-liquid mixing efficiency: Due to the uneven particle size distribution of the fragrance raw materials, material accumulation is easily formed during multi-stage transfer, resulting in local mass transfer dead zones;

[0004] Significant loss of volatile components: Low-boiling-point components such as essential oils are easily vaporized and lost during open feeding and inter-stage conveying processes.

[0005] To address this, a continuous countercurrent extraction device for extracting natural fragrances is proposed. Utility Model Content

[0006] The purpose of this invention is to solve the problems of low solid-liquid mixing efficiency and serious loss of volatile components in the existing technology, and to propose a continuous countercurrent extraction device for extracting natural fragrances.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A continuous countercurrent extraction device for extracting natural spices includes: a herringbone-shaped extraction tube, a condenser tube fixedly fitted at the bottom of the extraction tube, a feed box fixedly connected to one end of the extraction tube, a slag discharge pipe fixedly connected to the other end of the extraction tube, and a collection box fixedly installed below the slag discharge pipe. The herringbone-shaped extraction tube is composed of two inclined and connected tube sections, with an inclination angle of 30°-45° between the two tube sections.

[0009] The third motor is fixedly connected to one end of the extraction tube. The output shaft of the third motor is fixedly connected to the second auger. The top of the feed box is fixedly connected to the first motor. The output shaft of the first motor is fixedly connected to the first auger. The outer circumferences of the first and second augers are adapted to the inner wall of the extraction tube.

[0010] A push rod is slidably installed on one side of the feed box. A piston is fixedly connected to one end of the push rod, and a rack is fixedly connected to one side of the push rod. A feed pipe and an electric gate valve are fixedly connected to the top of the feed box. A second motor is fixedly connected to one side of the feed box. A gear is fixedly connected to one end of the output shaft of the second motor. The gear meshes with the rack. The outer circumference of the piston is adapted to the inner wall of the feed box.

[0011] In one possible design, the pitch of the second auger gradually decreases at the end near the third motor, and the first and second augers have liquid-permeable holes with a diameter of 0.5-3mm on their spirals.

[0012] In one possible design, a connecting infusion tube is fixedly connected to the outer circumference of the extraction tube.

[0013] In one possible design, a discharge pipe is fixedly connected to one side of the extraction tube.

[0014] In one possible design, an inlet pipe and an outlet pipe are fixedly connected to the outer circumference of the condenser tube.

[0015] In one possible design, the piston is wrapped with a fluororubber layer with a thickness of 3-5 mm on its outer circumference.

[0016] In one possible design, the piston is wrapped with a fluororubber layer with a thickness of 3-5 mm on its outer circumference.

[0017] In this application, firstly, the fragrance enters the feed box from the feed pipe. After the electric gate valve closes, the second motor drives the gear rack to mesh and push the piston to move back and forth along the feed box pipe, repeatedly squeezing the fragrance and dynamically squeezing and crushing it so that the raw material particle size is less than 2mm, increasing the contact area with the extract and improving the extraction speed.

[0018] Step 2: The electric gate valve is opened, and the second motor drives the gear rack to mesh. The piston sends the crushed spices into the first screw conveyor and slowly descends at a speed of 5-15 rpm, making them contact the extract in the opposite direction.

[0019] The third step is that the fragrance falls into the second screw conveyor after passing through the bend of the extraction tube. The second screw conveyor rises slowly at a speed of 5-15 rpm to mix thoroughly with the extract.

[0020] In the fourth step, the second screw conveyor slowly rises and approaches the slag outlet pipe, the screw pitch narrows, and the fragrance is squeezed, forcing the extract in the fragrance to flow back down into the tube through the liquid permeation hole, thus achieving solid-liquid dynamic separation and solvent circulation.

[0021] The fifth step involves extruding and dehydrating the spice residue, which is then transported to the slag discharge pipe via a second auger. The moisture content of the residue is reduced to below 5%, and it is discharged into the collection box through the pipe opening.

[0022] The sixth step involves the extract entering the extraction tube from the infusion tube, flowing against the direction of fragrance transport, and exiting from the discharge tube to obtain a high-concentration essential oil mixture.

[0023] Step 7: Cooling water at 15-25℃ enters from the inlet pipe of the condenser and exits from the outlet pipe. It exchanges heat through the pipe wall to maintain the temperature of the extraction tube at 15-25℃ and prevent the heat-sensitive components from volatilizing.

[0024] In this utility model, the continuous countercurrent extraction device for extracting natural spices, through the coordinated use of components such as an electric gate valve, a first motor, a feed box, a piston, a rack, a second motor, and gears, can drive the motor to engage the rack and gears, pushing the piston to move back and forth along the feed box pipe, repeatedly squeezing the spices, dynamically squeezing and crushing the spices, so that the spice particle size is less than 2mm, preventing the accumulation of uneven particle size during the transfer process, improving the solid-liquid mixing efficiency, and increasing production efficiency;

[0025] In this utility model, the continuous countercurrent extraction device for extracting natural fragrances uses components such as a condenser tube, a water inlet tube, a condenser tube, and a water outlet tube. Cooling water at 15-25°C enters from the water inlet tube of the condenser tube and exits from the water outlet tube. Heat is exchanged through the tube wall to maintain the temperature of the extraction tube at 15-25°C, preventing the volatilization of heat-sensitive components and increasing the yield.

[0026] In this invention, a motor drives a gear rack to mesh, which in turn pushes a piston to reciprocate and dynamically compress and crush the fragrance, making the fragrance particle size less than 2mm. This prevents uneven particle size and accumulation during the transfer process, and improves the solid-liquid mixing efficiency. In addition, cooling water at 15-25℃ circulates from the condenser tube, and heat is exchanged through the tube wall to maintain a constant temperature inside the extraction tube, preventing the volatilization of heat-sensitive components. Attached Figure Description

[0027] Figure 1 This is a first-view cross-sectional structural schematic diagram of a continuous countercurrent extraction device for extracting natural fragrances proposed in this utility model.

[0028] Figure 2 This is a schematic diagram of the first perspective structure of a continuous countercurrent extraction device for extracting natural fragrances proposed in this utility model.

[0029] Figure 3 This is a second-perspective structural schematic diagram of a continuous countercurrent extraction device for extracting natural fragrances proposed in this utility model.

[0030] Figure 4 This is a schematic diagram of the first internal view of a continuous countercurrent extraction device for extracting natural fragrances proposed in this utility model.

[0031] In the diagram: 1. Feed pipe; 2. Electric gate valve; 3. First motor; 4. Feed box; 5. Water inlet pipe; 6. Push rod; 601. Piston; 602. Rack; 7. Second motor; 8. Gear; 9. First auger; 10. Condenser; 11. Second auger; 12. Water outlet pipe; 13. Extraction pipe; 14. Infusion pipe; 15. Third motor; 16. Slag outlet pipe; 17. Collection box; 18. Discharge pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0033] Reference Figures 1-4 An extraction device includes: a herringbone-shaped extraction tube 13, a condenser tube 10 fixedly sleeved at the bottom of the extraction tube 13, a feed box 4 fixedly connected to one end of the extraction tube 13, a slag discharge tube 16 fixedly connected to the other end of the extraction tube 13, and a collection box 17 fixedly installed below the slag discharge tube 16. The herringbone-shaped extraction tube 13 is composed of two inclined and connected tube sections, with an inclination angle of 30°-45° between the two tube sections, which prolongs the countercurrent contact time between the extract and the fragrance and improves the extraction efficiency.

[0034] In this invention, a third motor 15 is fixedly connected to one end of the extraction tube 13, and a second auger 11 is fixedly connected to one end of the output shaft of the third motor 15. A first motor 3 is fixedly connected to the top of the feed box 4, and a first auger 9 is fixedly connected to one end of the output shaft of the first motor 3. The outer circumference of the first auger 9 and the second auger 11 are adapted to the inner wall of the extraction tube 13. The motor drives the auger to rotate and transport the fragrance.

[0035] In particular, the push rod 6 is slidably installed on one side of the feed box 4. One end of the push rod 6 is fixedly connected to the piston 601, and the other side of the push rod 6 is fixedly connected to the rack 602. The top of the feed box 4 is fixedly connected to the feed pipe 1 and the electric gate valve 2. The other side of the feed box 4 is fixedly connected to the second motor 7. One end of the output shaft of the second motor 7 is fixedly connected to the gear 8. The gear 8 meshes with the rack 602. The outer circumference of the piston 601 is adapted to the inner wall of the feed box 4. The second motor 7 drives the gear 8 to mesh with the rack 602, pushing the piston 601 to move back and forth along the feed box 4 pipe, repeatedly squeezing the fragrance, dynamically squeezing and crushing the fragrance so that the fragrance particle size is less than 2mm, preventing uneven particle size and accumulation during the transfer process, improving the solid-liquid mixing efficiency, and increasing production efficiency.

[0036] It should be noted that the screw pitch of the second screw 11 gradually decreases at the end near the third motor 15. The screws of the first screw 9 and the second screw 11 are provided with liquid permeation holes with a diameter of 0.5-3mm. As the second screw 11 slowly rises and approaches the slag outlet pipe 16, the screw pitch decreases, squeezing the fragrance and forcing the extract in the fragrance to flow back down into the tube along the liquid permeation holes, thus realizing solid-liquid dynamic separation and solvent circulation.

[0037] This application can be used in the field of spice extraction as well as in other fields applicable to this application. Example 2

[0038] refer to Figures 1-4 Based on Example 1, an improved continuous countercurrent extraction device for natural fragrance extraction is applied to the field of fragrance extraction. A liquid infusion pipe 14 is fixedly connected to the outer circumference of the extraction tube 13, and a discharge pipe 18 is fixedly connected to one side of the extraction tube 13. The extract enters the extraction tube 13 from the liquid infusion pipe 14 and is discharged from the discharge pipe 18 against the direction of fragrance transport, thereby obtaining a high-concentration essential oil mixture.

[0039] In this invention, an inlet pipe 5 and an outlet pipe 12 are fixedly connected to the outer circumference of the condenser tube 10. Cooling water at 15-25°C enters from the inlet pipe 5 of the condenser tube 10 and exits from the outlet pipe 12, realizing the circulation of cold water. Heat is exchanged through the pipe wall to maintain the temperature of the extraction tube 13 at 15-25°C and prevent the evaporation of heat-sensitive components.

[0040] In particular, the outer circumference of piston 601 is wrapped with a fluororubber layer with a thickness of 3-5mm;

[0041] It should be noted that multiple support legs are fixedly connected to the outer wall of the extraction tube 13, and rubber shock-absorbing pads are glued to the bottom of each support leg to reduce equipment vibration and improve the stability of equipment operation.

[0042] However, as is well known to those skilled in the art, the working principles and wiring methods of the electric gate valve 2, the first motor 3, the second motor 7 and the third motor 15 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous countercurrent extraction apparatus for extracting natural fragrances, characterized in that, include: The extraction tube (13) is shaped like a herringbone. A condenser tube (10) is fixedly fitted at the bottom of the extraction tube (13). One end of the extraction tube (13) is fixedly connected to a feed box (4), and the other end of the extraction tube (13) is fixedly connected to a slag discharge pipe (16). A collection box (17) is fixedly installed below the slag discharge pipe (16). The extraction tube (13) is shaped like a herringbone. It consists of two inclined and connected tubes. The inclination angle between the two tubes is 30°-45°. The third motor (15) is fixedly connected to one end of the extraction tube (13). The output shaft of the third motor (15) is fixedly connected to the second auger (11). The top of the feed box (4) is fixedly connected to the first motor (3). The output shaft of the first motor (3) is fixedly connected to the first auger (9). The outer circumference of the first auger (9) and the second auger (11) are adapted to the inner wall of the extraction tube (13). A push rod (6) is slidably inserted through one side of the feed box (4). A piston (601) is fixedly connected to one end of the push rod (6). A rack (602) is fixedly connected to one side of the push rod (6). A feed pipe (1) and an electric gate valve (2) are fixedly connected to the top of the feed box (4). A second motor (7) is fixedly connected to one side of the feed box (4). A gear (8) is fixedly connected to one end of the output shaft of the second motor (7). The gear (8) meshes with the rack (602). The outer circumference of the piston (601) is adapted to the inner wall of the feed box (4).

2. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The pitch of the second auger (11) near the end of the third motor (15) gradually decreases, and the first auger (9) and the second auger (11) are provided with liquid permeable holes with a diameter of 0.5-3mm.

3. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The extraction tube (13) is fixedly connected to a communicating infusion tube (14) on its outer circumference.

4. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The extraction tube (13) is fixedly connected to a discharge tube (18) on one side.

5. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The condenser tube (10) is fixedly connected to an inlet pipe (5) and an outlet pipe (12) on its outer circumference.

6. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The piston (601) is wrapped with a fluororubber layer with a thickness of 3-5 mm on the outer circumference.

7. The continuous countercurrent extraction apparatus for extracting natural fragrances according to claim 1, characterized in that, The outer wall of the extraction tube (13) is fixedly connected with multiple support legs, and the bottom of each support leg is glued with a rubber shock-absorbing pad.

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