Subcritical extraction device and extraction method for producing plant-derived seasoning

Abstract

The invention relates to the technical field of subcritical extraction devices, in particular to a subcritical extraction device for plant source seasoning production, which comprises an extraction tank, a separation tank, a water separation tank and a heating box, the extraction tank is connected with the separation tank through a conveying pipe, and a liquid storage cavity and a heating cavity are formed in the separation tank; a supporting seat is fixedly mounted at the bottom of the separation tank, a sealing cavity is formed in the supporting seat, the heating box is connected with the heating cavity through a liquid inlet pipe and a liquid outlet pipe, a water pump is arranged in the heating box, and a rotating assembly is arranged on the separation tank; and an exhaust pipe is fixedly arranged on the separation tank, and the lower inner wall of the heating cavity is connected with a first annular sealing plate through a plurality of supporting springs. According to the subcritical extraction device, an extraction solvent can be heated, gasified and quickly discharged from the exhaust pipe, so that the extraction solvent can be quickly discharged, the extraction efficiency of the plant seasoning oil is relatively high, and the subcritical extraction device is favorably used.

Description

Technical Field

[0001] The invention relates to the technical field of subcritical extraction devices, in particular to a subcritical extraction device and an extraction method for producing plant-based seasonings. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, the technology related to subcritical extraction devices is also constantly improving. Subcritical fluid extraction is a new type of extraction and separation technology. It uses subcritical fluid as an extractant to extract materials based on the principle that like dissolves like in organic matter, and then separates the extractant from the target product through a reduced pressure evaporation process, thereby extracting the target product from the natural product.

[0003] At present, plant-based seasonings need to go through multiple processing steps during production and processing, including extraction using a subcritical extraction device. However, the subcritical extraction device currently used cannot quickly discharge the extraction solvent when extracting plant seasoning oils, and the extraction efficiency of plant seasoning oils is low, which is not conducive to the use of subcritical extraction devices. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: when the subcritical extraction device currently used is used to extract the plant seasoning oil, the extraction solvent cannot be quickly discharged, the extraction efficiency of the plant seasoning oil is low, and it is not conducive to the use of the subcritical extraction device. The subcritical extraction device and extraction method for the production of plant-based seasonings are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A subcritical extraction device for producing plant-based seasonings, comprising an extraction tank, a separation tank, a water separation tank and a heating box, wherein the extraction tank is connected to the separation tank via a delivery pipe, a liquid storage chamber and a heating chamber are provided in the separation tank, a support seat is fixedly installed at the bottom of the separation tank, a sealing chamber is provided in the support seat, the heating box is connected to the heating chamber via a liquid inlet pipe and a liquid discharge pipe, a water pump is provided in the heating box, and a rotating assembly is provided on the separation tank;

[0007] An exhaust pipe is fixedly arranged on the separation tank, a first annular sealing plate is connected to the lower inner wall of the heating chamber via a plurality of supporting springs, a plurality of supporting blocks are fixedly connected to the lower inner wall of the heating chamber, an ear plate is fixedly connected to the lower surface of the first annular sealing plate, and a sliding assembly is arranged on the ear plate;

[0008] A second annular sealing plate is slidably connected in the sealing cavity, a bending strip is fixedly connected to the upper surface of the second annular sealing plate, a sealing strip is fixedly connected to the bending strip, the sealing strip is slidably connected to the liquid inlet pipe and the liquid discharge pipe, two through holes are provided on the sealing strip, a heating hollow shell is fixedly connected to the heating box, and the sealing cavity is connected to the heating hollow shell through a fixed tube.

[0009] As a preferred solution, the sliding assembly includes a sliding rod slidably mounted on the ear plate, the sliding rod is sleeved with a first spring, one end of the first spring is fixedly connected to the sliding rod, the other end of the first spring is fixedly connected to the ear plate, and one end of the sliding rod is fixedly connected to an extrusion block.

[0010] As a preferred solution, the cross-section of the extrusion block is an isosceles trapezoid, a plurality of blocks are fixedly connected to one side surface of the sealing strip, a slot is provided at one end of each block, and a through opening is provided on one side of the heating chamber.

[0011] As a preferred solution, a closing plate is slidably connected to the support seat, the closing plate and the fixed tube are slidably connected, a fixing sleeve is fixedly connected to the closing plate, and the fixing sleeve is connected to the sliding rod via a bending rod.

[0012] As a preferred solution, a plurality of second springs are fixedly provided on the upper inner wall of the sealing cavity, and each of the second springs is fixedly connected to the second annular sealing plate.

[0013] As a preferred embodiment, the rotating assembly includes a rotating shaft rotatably mounted on the separation tank, a cam being fixedly connected to the rotating shaft, and a plurality of bending rods arranged in a circular array being slidably connected to the support seat, and an arc block and a rake bar being fixedly mounted at both ends of each bending rod.

[0014] As a preferred solution, each of the bending rods is sleeved with a third spring, one end of the third spring is fixedly connected to the bending rod, the other end of the third spring is fixedly connected to the support seat, a plurality of airbags are fixedly connected to the inner wall of the support seat, and each of the airbags is provided with two one-way valves.

[0015] As a preferred solution, a fixed shell and two discharge pipes are fixedly connected to the water diversion tank, the fixed shell is connected to the heating hollow shell through an air supply pipe, one of the discharge pipes is connected to the fixed shell through a bending pipe, and one of the discharge pipes is fixedly connected to a filter residue net.

[0016] As a preferred solution, a rectangular plate is fixedly connected inside the bending tube, a sealing scraper is connected to the rectangular plate via a return spring, a sealing block is fixedly connected to one end of the sealing scraper, and a gas release valve is provided on the bending tube.

[0017] The extraction method of the subcritical extraction device for producing plant-based seasonings comprises the following steps:

[0018] S1: Putting the plant-based seasoning raw materials and the extraction solvent into the extraction tank and performing extraction;

[0019] S2: After the extraction is completed, the pump transports the mixed liquid in the extraction tank to the liquid storage chamber of the separation tank through the delivery pipe, and the mixed liquid is heated by the hot water in the heating chamber;

[0020] S3: The servo motor drives the rotating shaft to rotate, and the hot water inside the heating chamber can be replaced multiple times, so that the hot water in the heating chamber always maintains a high temperature, and the gasification and discharge speed of the extraction solvent is accelerated;

[0021] S4: When the extraction solvent is completely removed, the pump pumps the mixed liquid in the separation tank into the water separation tank, and the hot air in the heated hollow shell is transported to the fixed shell through the air supply pipe. The fixed shell and the water separation tank exchange heat, and finally the oil is discharged through one of the discharge pipes.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. During the rotation of the cam, the rake bar will move back and forth in the heating chamber. The mixed solution can be stirred during the movement of the rake bar, so that the hot water in the heating chamber can evenly heat the mixed solution, which is beneficial to the heating and vaporization of the extraction solvent and its rapid discharge from the exhaust pipe, thereby enabling the extraction solvent to be quickly discharged, resulting in a higher extraction efficiency for the plant seasoning oil, which is beneficial to the use of the subcritical extraction device;

[0024] 2. The hot water inside the heating chamber can be automatically replaced multiple times so that the hot water in the heating chamber always maintains a high temperature, so as to better heat the extraction solvent, which is conducive to the rapid discharge of the extraction solvent and has a higher extraction efficiency for plant seasoning oil;

[0025] 3. The heating box, the fixed shell, the water separation tank and the separation tank all have good thermal conductivity. The air in the heated hollow shell also maintains a relatively high temperature. After the low-temperature air is discharged into the heated hollow shell through the fixed pipe, the hot air in the heated hollow shell is transported to the fixed shell through the air delivery pipe. The fixed shell and the water separation tank perform heat exchange to heat the mixed liquid in the water separation tank, so as to increase the speed of oil-water separation, which is beneficial to improve the production efficiency of vegetable seasoning oil.

[0026] 4. When the high-temperature gas is transported to the interior of the fixed shell through the air supply pipe, the gas inside the fixed shell will be discharged into the interior of the bent tube and push the sealing block to move. The sealing scraper will slide relative to the rectangular plate. During the movement of the sealing scraper close to the surface of the filter residue net, the debris on the filter residue net can be scraped off to avoid serious blockage of the filter residue net, so as to facilitate the smooth outflow of the subsequent oil and facilitate the use of the extraction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the front structure of the subcritical extraction device for producing plant-based seasonings proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the back structure of the subcritical extraction device for producing plant-based seasonings proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the partial internal structure of the subcritical extraction device for producing plant-based seasonings proposed by the present invention;

[0030] Figure 4 It is a schematic diagram of the front internal structure of the separation tank in the present invention;

[0031] Figure 5 It is a schematic diagram of the internal structure of the separation tank in the present invention when viewed from above;

[0032] Figure 6 for Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part;

[0033] Figure 7 It is a schematic diagram of the front internal structure of the bending pipe and the discharge pipe in the present invention;

[0034] Figure 8 It is a bottom view schematic diagram of the internal structure of the bending pipe and the discharge pipe in the present invention;

[0035] Fig. 9 It is a schematic diagram of the front structure of the sealing strip and the bending strip in the present invention;

[0036] Fig.10 This is a schematic diagram of the side structure of the subcritical extraction device for producing plant-based seasonings proposed by the present invention.

[0037] In the figure: 1 extraction tank, 2 separation tank, 3 heating box, 4 heating hollow shell, 5 water distribution tank, 6 liquid inlet pipe, 7 liquid discharge pipe, 8 support seat, 9 bending rod, 10 third spring, 11 fixed shell, 12 bending pipe, 13 discharge pipe, 14 fixed pipe, 15 cam, 16 rotating shaft, 17 arc block, 18 liquid storage chamber, 19 rake, 20 heating chamber, 21 air bag, 22 first annular sealing plate, 23 gas release valve, 24 sealing block, 25 rectangular plate, 26 sealing scraper, 27 card block, 28 through hole, 29 second spring, 30 bending strip, 31 filter residue net, 32 closing plate, 33 fixed sleeve, 34 sealing strip, 35 sealing chamber, 36 bending rod, 37 through port, 38 extrusion block, 39 ear plate, 40 slide rod, 41 support block, 42 ​​first spring, 43 second annular sealing plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Reference Figure 1-Figure 10 A subcritical extraction device for producing plant-based seasonings includes an extraction tank 1, a separation tank 2, a water separation tank 5 and a heating box 3. The extraction tank 1 is connected to the separation tank 2 through a delivery pipe. A liquid storage chamber 18 and a heating chamber 20 are provided in the separation tank 2. A support seat 8 is fixedly installed at the bottom of the separation tank 2. A sealing chamber 35 is provided in the support seat 8. The heating box 3 is connected to the heating chamber 20 through a liquid inlet pipe 6 and a liquid discharge pipe 7. A water pump is provided in the heating box 3. A rotating component is provided on the separation tank 2. An exhaust pipe is fixedly provided on the separation tank 2. The lower inner wall of the heating chamber 20 is connected to a first annular sealing plate 22 through a plurality of supporting springs. A plurality of supporting blocks 41 are fixedly connected to the lower inner wall of the heating chamber 20. An ear plate 39 is fixedly connected to the lower surface of the first annular sealing plate 22. A sliding component is provided on the ear plate 39.

[0040] A second annular sealing plate 43 is slidably connected in the sealing cavity 35, a bending strip 30 is fixedly connected to the upper surface of the second annular sealing plate 43, a sealing strip 34 is fixedly connected to the bending strip 30, the sealing strip 34 is slidably connected to the liquid inlet pipe 6 and the liquid discharge pipe 7, two through holes 28 are provided on the sealing strip 34, a heating hollow shell 4 is fixedly connected to the heating box 3, and the sealing cavity 35 is connected to the heating hollow shell 4 through a fixed tube 14.

[0041] The sliding assembly includes a sliding rod 40 slidably mounted on the ear plate 39, a first spring 42 is sleeved on the sliding rod 40, one end of the first spring 42 is fixedly connected to the sliding rod 40, and the other end of the first spring 42 is fixedly connected to the ear plate 39, one end of the sliding rod 40 is fixedly connected to an extrusion block 38, and the cross section of the extrusion block 38 is arranged in an isosceles trapezoid, a side surface of the sealing strip 34 is fixedly connected to a plurality of blocks 27, and a slot is provided at one end of each block 27, and a through opening 37 is provided on one side of the heating chamber 20 When the second annular sealing plate 43 moves up to a certain height, the surface of part of the block 27 will move against the arc surface of the extrusion block 38, thereby causing the slide bar 40 and the ear plate 39 to slide relative to each other, and then the end face of the block 27 will fit with the end face of the rubber material of the extrusion block 38. When the groove on the end face of the block 27 and one end of the rubber material of the extrusion block 38 are arranged face to face, the extrusion block 38 will move under the elastic force of the first spring 42 until one end of the rubber material of the extrusion block 38 is engaged with the groove.

[0042] A closing plate 32 is slidably connected to the support seat 8, and the closing plate 32 is slidably connected to the fixed tube 14. A fixing sleeve 33 is fixedly connected to the closing plate 32, and the fixing sleeve 33 is connected to the sliding rod 40 through a bending rod 36. A plurality of second springs 29 are fixedly provided on the upper inner wall of the sealing cavity 35, and each second spring 29 is fixedly connected to the second annular sealing plate 43. In the initial state, that is, when the extrusion block 38 is not in contact with the clamping block 27, the closing plate 32 is tightly attached to the inner wall of the support seat 8, and the air outlet of the sealing cavity 35 is completely sealed and blocked. At this time, the first spring 42 does not deform. When the clamping block 27 is engaged with the clamping groove, the first spring 42 is deformed, and the sliding rod 40 and the ear plate 39 slide relative to each other. Under the transmission action of the bending rod 36, the fixing sleeve 33 and the closing plate 32 will slide relative to the support seat 8. After the closing plate 32 moves, the rectangular hole on the closing plate 32 will move to the inside of the fixed tube 14.

[0043] The rotating assembly includes a rotating shaft 16 rotatably mounted on the separation tank 2, a cam 15 is fixedly connected to the rotating shaft 16, a plurality of bending rods 9 arranged in a ring array are slidably connected to the support seat 8, an arc block 17 and a rake bar 19 are fixedly mounted at both ends of each bending rod 9, a third spring 10 is sleeved on each bending rod 9, one end of the third spring 10 is fixedly connected to the bending rod 9, and the other end of the third spring 10 is fixedly connected to the support seat 8, a plurality of air bags 21 are fixedly connected to the inner wall of the support seat 8, and each air bag 21 is provided with two one-way valves. During the rotation of the cam 15, multiple one-way valves are The arc surface of each arc block 17 is squeezed and separated. When the arc block 17 is squeezed, the bending rod 9 will slide relative to the support seat 8, and the third spring 10 will be deformed. After the cam 15 is separated from the arc block 17, the arc block 17 will be reset under the elastic force of the third spring 10. During this process, the rake bar 19 will move back and forth in the heating chamber 20. The mixed solution can be stirred during the back and forth movement of the rake bar 19. During the back and forth movement of each arc block 17, it will squeeze and separate from the air bag 21 many times. After the air bag 21 is squeezed, the gas inside it will be discharged into the sealing chamber 35.

[0044] A fixed shell 11 and two discharge pipes 13 are fixedly connected to the water distribution tank 5. The fixed shell 11 is connected to the heating hollow shell 4 through an air supply pipe. One of the discharge pipes 13 is connected to the fixed shell 11 through a bending pipe 12. One of the discharge pipes 13 is fixedly connected to a filter residue net 31. A rectangular plate 25 is fixedly connected inside the bending pipe 12. A sealing scraper 26 is connected to the rectangular plate 25 through a return spring. One end of the sealing scraper 26 is fixedly connected to a sealing block 24. A gas release valve 23 is provided on the bending pipe 12. In the initial state, the T-shaped sealing scraper 26 is located between the discharge pipe 13 and the bending pipe 12. The sealing strip 26 is disposed between the bent tubes 12 and the discharge tube 13 is sealed and blocked. When the high-temperature gas is transported to the inside of the fixed shell 11 through the air supply pipe, the gas inside the fixed shell 11 will be discharged into the inside of the bent tube 12 and push the sealing block 24 to move. The sealing scraper 26 will slide relative to the rectangular plate 25, and the reset spring will be deformed. During the movement of the sealing scraper 26 close to the surface of the filter residue net 31, the debris on the filter residue net 31 can be scraped off to avoid serious blockage of the filter residue net 31. When the moving distance of the sealing scraper 26 reaches the maximum, the gas release valve 23 opens and the gas is discharged.

[0045] The extraction method of the subcritical extraction device for producing plant-based seasonings comprises the following steps:

[0046] S1: Putting the plant-based seasoning raw materials and the extraction solvent into the extraction tank 1 and performing extraction;

[0047] S2: After the extraction is completed, the pump transports the mixed liquid in the extraction tank 1 to the liquid storage chamber 18 of the separation tank 2 through the delivery pipe, and the mixed liquid is heated by the hot water in the heating chamber 20;

[0048] S3: The servo motor drives the rotating shaft 16 to rotate, and the hot water inside the heating chamber 20 can be replaced multiple times, so that the hot water in the heating chamber 20 always maintains a high temperature, and the gasification and discharge speed of the extraction solvent is accelerated;

[0049] S4: When the extraction solvent is completely removed, the pump pumps the mixed liquid in the separation tank 2 into the water separation tank 5, and the hot air in the heated hollow shell 4 is transported to the inside of the fixed shell 11 through the air supply pipe. The fixed shell 11 and the water separation tank 5 perform heat exchange, and finally the oil is discharged through one of the discharge pipes 13.

[0050] In the present invention, when in use, the plant-based seasoning raw materials and the extraction solvent are put into the extraction tank 1 and after the extraction is completed, the pump transports the mixed liquid in the extraction tank 1 to the liquid storage chamber 18 of the separation tank 2 through the delivery pipe. At this time, a proper amount of hot water is stored in the heating chamber 20, and a proper amount of hot water is also stored in the heating box 3 and the hot water is electrically heated and heat-insulated. At the same time, the servo motor drives the rotating shaft 16 to rotate. During the rotation of the cam 15, the arc surface of each arc block 17 will be squeezed and separated for many times. When the arc block 17 is squeezed, the bending rod 9 will slide relative to the support seat 8, and the third spring 1 0 is deformed, and after the cam 15 is separated from the arc block 17, the arc block 17 will be reset under the elastic force of the third spring 10. During this process, the rake bar 19 will move back and forth in the heating chamber 20. The mixed solution can be stirred during the back and forth movement of the rake bar 19, so that the hot water in the heating chamber 20 can evenly heat the mixed solution, which is beneficial to the heating and vaporization of the extraction solvent and its rapid discharge from the exhaust pipe, thereby enabling the extraction solvent to be quickly discharged, and the extraction efficiency of the plant seasoning oil is high, which is beneficial to the use of the subcritical extraction device, and the sealing performance of the bending rod 9 when connected to the separation tank 2 is good.

[0051] During the back and forth movement of each arc block 17, it will squeeze and separate from the airbag 21 for many times. Each airbag 21 is connected to the sealed chamber 35, and the two one-way valves can prevent the gas in the sealed chamber 35 from flowing back into the airbag 21. After the airbag 21 is squeezed, the gas inside it will be discharged into the sealed chamber 35. The first annular sealing plate 22 has good sealing performance when connected to the inner wall of the separation tank 2. At this time, the first annular sealing plate 22 is located at the bottom of the heating chamber 20 under the gravity of the hot water, that is, the first annular sealing plate 22 is located at the bottom of the heating chamber 20. The lower surface of the arc-shaped sealing plate 22 fits with the upper end surface of the support block 41. At this time, the slide rod 40 is located on the opposite side of the through-hole 37. One end of the extrusion block 38 will penetrate the through-hole 37 under the elastic force of the first spring 42. As the number of times the cam 15 squeezes the arc-shaped block 17 increases, the gas in the sealing chamber 35 will continue to increase after the airbag 21 is squeezed multiple times. When the second annular sealing plate 43 is connected to the inner wall of the sealing chamber 35, the sealing performance is good, and the second annular sealing plate 43 will move upward in the sealing chamber 35.

[0052] As the sealing strip 34 moves upward along with the second annular sealing plate 43, the sealing strip 34 will slide relative to the liquid discharge pipe 7 and the liquid inlet pipe 6 at the same time. In the initial state, the upper through hole 28 is located inside the liquid inlet pipe 6, and the lower through hole 28 is located outside the liquid discharge pipe 7. The sealing strip 34 has good sealing performance when connected to the liquid inlet pipe 6 and the liquid discharge pipe 7. When the second annular sealing plate 43 moves upward to a certain height, the surface of part of the block 27 will move against the arc surface of the extrusion block 38, thereby causing the slide bar 40 and the ear plate 39 to slide relative to each other. The end face of the clamping block 27 will fit with the end face of the rubber material of the extrusion block 38. When the clamping groove of the end face of the clamping block 27 and one end of the rubber material of the extrusion block 38 are arranged face to face, the extrusion block 38 will move under the elastic force of the first spring 42 until one end of the rubber material of the extrusion block 38 is engaged with the clamping groove. At this time, the upper through hole 28 moves to the outside of the liquid inlet pipe 6, and the lower through hole 28 moves to the inside of the liquid discharge pipe 7, that is, the liquid inlet pipe 6 is in a closed state, and the liquid discharge pipe 7 is in a conducting state. The highest liquid level of the hot water in the heating box 3 is always located at the right end of the liquid discharge pipe 7 (as shown in the attached figure). Figure 1 As shown in the figure, the hot water in the heating chamber 20 will be discharged to the interior of the heating box 3 through the drain pipe 7.

[0053] In the initial state, that is, when the extrusion block 38 is not in contact with the clamping block 27, the closing plate 32 is tightly attached to the inner wall of the support seat 8, and the air outlet (not shown) of the sealing chamber 35 is completely sealed and blocked. At this time, the first spring 42 does not deform. When the clamping block 27 is engaged with the clamping groove, the first spring 42 is deformed, and the slide bar 40 and the ear plate 39 slide relative to each other. Since one end of the bending rod 36 is fixedly connected to the slide bar 40 and the other end is slidably connected to the fixed sleeve 33, under the transmission action of the bending rod 36, the fixed sleeve 33 and the closing plate 32 will slide relative to the support seat 8. After the closing plate 32 moves, the rectangular hole (not shown) on the closing plate 32 will move to the inside of the fixed tube 14, and the sealing performance of the closing plate 32 when connected to the fixed tube 14 is good. A one-way valve is provided on the fixed tube 14, and the air in the sealing chamber 35 can pass through the air outlet and the rectangular hole, and be transported from the fixed tube 14 to the inside of the heating hollow shell 4.

[0054] When most of the hot water in the heating chamber 20 is discharged into the interior of the heating box 3, since one end of each supporting spring is fixedly connected to the first annular sealing plate 22, and the other end is fixedly connected to the lower inner wall of the heating chamber 20, under the elastic force of the supporting spring, the first annular sealing plate 22 will move vertically upward, and one end of the rubber material of the extrusion block 38 will be deformed and disengaged from the card slot. During the movement of the extrusion block 38, it will move to the top of the through-hole 37. At this time, the rectangular hole is still arranged face to face with the air outlet. Without the limiting effect of the extrusion block 38, under the elastic force of the second spring 29, the second annular sealing plate 43 will move downward in the sealing chamber 35 After the sealing strip 34 moves down to the initial position, the liquid inlet pipe 6 is in a conducting state and the liquid discharge pipe 7 is in a closed state. Then, under the action of the water pump, the hot water inside the heating box 3 can be pumped into the heating chamber 20. The first annular sealing plate 22 will move down to the lowest point again under the gravity of the hot water, that is, it will contact the surface of the support block 41, and the closing plate 32 will seal and block the air outlet again. By repeating the above process, the hot water inside the heating chamber 20 can be replaced multiple times, so that the hot water in the heating chamber 20 can always maintain a higher temperature, so as to better heat the extraction solvent, which is conducive to the rapid discharge of the extraction solvent and has a higher extraction efficiency for the vegetable seasoning oil.

[0055] When the extraction solvent is completely removed, the pump pumps the mixed liquid in the separation tank 2 into the water separation tank 5. The thermal conductivity of the heating box 3, the fixed shell 11, the water separation tank 5 and the separation tank 2 are all good. The air in the heated hollow shell 4 is also kept at a relatively high temperature. After the low-temperature air is discharged into the heated hollow shell 4 through the fixed pipe 14, the hot air in the heated hollow shell 4 will be transported to the fixed shell 11 through the air supply pipe. The fixed shell 11 and the water separation tank 5 perform heat exchange to heat the mixed liquid in the water separation tank 5, so as to increase the speed of oil-water separation, which is beneficial to improving the production efficiency of vegetable seasoning oil.

[0056] A one-way valve is installed on the bending tube 12, and the sealing block 24 has good sealing performance when connected to the inner wall of the bending tube 12. When the high-temperature gas is transported to the inside of the fixed shell 11 through the air supply pipe, the gas inside the fixed shell 11 will be discharged into the inside of the bending tube 12 and push the sealing block 24 to move, and the sealing scraper 26 will slide relative to the rectangular plate 25. Since one end of the return spring is fixedly connected to the rectangular plate 25 and the other end is fixedly connected to the sealing scraper 26, the return spring is deformed. During the movement of the sealing scraper 26 close to the surface of the filter residue net 31, the debris on the filter residue net 31 can be scraped off to avoid serious blockage of the filter residue net 31, so as to facilitate the smooth outflow of the subsequent oil, which is beneficial to the use of the extraction device.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A subcritical extraction device for producing plant-based seasonings, characterized in that: The invention comprises an extraction tank (1), a separation tank (2), a water separation tank (5) and a heating box (3); the extraction tank (1) is connected to the separation tank (2) via a delivery pipe; a liquid storage chamber (18) and a heating chamber (20) are provided in the separation tank (2); a support seat (8) is fixedly mounted on the bottom of the separation tank (2); a sealing chamber (35) is provided in the support seat (8); the heating box (3) is connected to the heating chamber (20) via a liquid inlet pipe (6) and a liquid discharge pipe (7); a water pump is provided in the heating box (3); and a rotating assembly is provided on the separation tank (2); An exhaust pipe is fixedly arranged on the separation tank (2); a first annular sealing plate (22) is connected to the lower inner wall of the heating chamber (20) via a plurality of supporting springs; a plurality of supporting blocks (41) are fixedly connected to the lower inner wall of the heating chamber (20); an ear plate (39) is fixedly connected to the lower surface of the first annular sealing plate (22); and a sliding assembly is arranged on the ear plate (39); A second annular sealing plate (43) is slidably connected in the sealing cavity (35); a bending strip (30) is fixedly connected to the upper surface of the second annular sealing plate (43); a sealing strip (34) is fixedly connected to the bending strip (30); the sealing strip (34) is slidably connected to the liquid inlet pipe (6) and the liquid discharge pipe (7); two through holes (28) are provided on the sealing strip (34); a heating hollow shell (4) is fixedly connected to the heating box (3); and the sealing cavity (35) is connected to the heating hollow shell (4) via a fixed pipe (14).

2. The subcritical extraction device for producing plant-derived seasoning according to claim 1, characterized in that: The sliding assembly comprises a sliding rod (40) slidably mounted on the ear plate (39); a first spring (42) is sleeved on the sliding rod (40); one end of the first spring (42) is fixedly connected to the sliding rod (40); the other end of the first spring (42) is fixedly connected to the ear plate (39); and one end of the sliding rod (40) is fixedly connected to an extrusion block (38).

3. The subcritical extraction device for producing plant-derived seasoning according to claim 2, characterized in that: The cross section of the extrusion block (38) is arranged in an isosceles trapezoidal shape, a plurality of clamping blocks (27) are fixedly connected to a surface of one side of the sealing strip (34), a clamping groove is provided at one end of each clamping block (27), and a through opening (37) is provided on one side of the heating chamber (20).

4. The subcritical extraction device for producing plant-derived seasoning according to claim 2, characterized in that: A closing plate (32) is slidably connected to the support seat (8), the closing plate (32) and the fixed tube (14) are slidably connected, a fixing sleeve (33) is fixedly connected to the closing plate (32), and the fixing sleeve (33) is connected to the sliding rod (40) via a bending rod (36).

5. The subcritical extraction device for producing plant-derived seasoning according to claim 1, characterized in that: A plurality of second springs (29) are fixedly arranged on the upper inner wall of the sealing cavity (35), and each of the second springs (29) is fixedly connected to the second annular sealing plate (43).

6. The subcritical extraction device for producing plant-derived seasoning according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (16) rotatably mounted on the separation tank (2), a cam (15) being fixedly connected to the rotating shaft (16), a plurality of bending rods (9) arranged in a ring array being slidably connected to the support seat (8), and an arc block (17) and a rake bar (19) being fixedly mounted at both ends of each bending rod (9), respectively.

7. The subcritical extraction device for producing plant-derived seasoning according to claim 1, characterized in that: A third spring (10) is sleeved on each of the bending rods (9), one end of the third spring (10) is fixedly connected to the bending rod (9), and the other end of the third spring (10) is fixedly connected to the support seat (8). The inner wall of the support seat (8) is fixedly connected with a plurality of air bags (21), and each of the air bags (21) is provided with two one-way valves.

8. The subcritical extraction device for producing plant-derived seasoning according to claim 1, characterized in that: A fixed shell (11) and two discharge pipes (13) are fixedly connected to the water separation tank (5); the fixed shell (11) is connected to the heating hollow shell (4) via an air supply pipe; one of the discharge pipes (13) is connected to the fixed shell (11) via a bent pipe (12); and one of the discharge pipes (13) is fixedly connected to a filter residue net (31).

9. The subcritical extraction device for producing plant-derived seasoning according to claim 8, characterized in that: A rectangular plate (25) is fixedly connected inside the bending tube (12), a sealing scraper (26) is connected to the rectangular plate (25) via a return spring, one end of the sealing scraper (26) is fixedly connected to a sealing block (24), and a gas release valve (23) is provided on the bending tube (12).

10. An extraction method according to the subcritical extraction device for producing plant-based seasonings according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Putting the plant-based seasoning raw materials and the extraction solvent into the extraction tank (1) and performing extraction; S2: After the extraction is completed, the pump transports the mixed liquid in the extraction tank (1) to the liquid storage chamber (18) of the separation tank (2) through the transport pipe, and the mixed liquid is heated by the hot water in the heating chamber (20); S3: The servo motor drives the rotating shaft (16) to rotate, so that the hot water inside the heating chamber (20) can be replaced multiple times, so that the hot water in the heating chamber (20) always maintains a high temperature, thereby accelerating the gasification and discharge speed of the extraction solvent; S4: After the extraction solvent is completely removed, the pump pumps the mixed liquid in the separation tank (2) into the water separation tank (5), and the hot air in the heated hollow shell (4) is transported to the interior of the fixed shell (11) through the air supply pipe. The fixed shell (11) and the water separation tank (5) perform heat exchange, and finally the oil is discharged through one of the discharge pipes (13).

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