A kind of sound wave counterflow extraction combines membrane separation technology peel tea extract equipment and process

Abstract

The present application relates to the technical field of peel product production extraction, in particular to a peel tea extract production equipment and process combining ultrasonic backflow extraction and membrane separation technology, comprising an extraction unit, a plurality of ultrasonic generators and a membrane filtration assembly, the rear end of the extraction unit being connected with a residue discharge assembly, the residue discharge assembly comprising a residue discharge tank, a residue extrusion structure and a dredging structure; the residue extrusion structure comprising a residue extrusion cylinder and a residue extrusion auger arranged in the residue extrusion cylinder, the middle part of the residue extrusion cylinder being a conical shrink cover, the outer wall of the shrink cover being provided with a plurality of water outlet holes; the dredging structure comprising a rotating cover, a plurality of movable plates and a plurality of push plates fixed to the inner wall of the rotating cover. The present application can directly extrude the peel residue to collect and recycle the excess solvent and reduce solvent waste by setting the residue extrusion structure when the residue extrusion auger discharges the residue upward. The present application can continuously dredge the water outlet holes to avoid residue blocking the water outlet holes and failing to discharge the excess solvent by setting the dredging structure when the residue is extruded.

Description

Technical Field

[0001] This invention belongs to the field of fruit peel product production and extraction technology, specifically a fruit peel tea extract preparation equipment and process using acoustic countercurrent extraction combined with membrane separation technology. Background Technology

[0002] Fruit peel tea extract is a concentrated beverage extracted from fruit peels. Due to its rich nutritional content, including vitamins and dietary fiber, and its strong fruity flavor, it is widely used in medicine, food, and tea industries. The extraction of fruit peel tea extract typically employs ultrasonic countercurrent extraction, where the fruit peel raw material and the corresponding solvent flow relative to each other, maintaining a maximum concentration gradient between the solid and liquid phases to improve extraction efficiency and reduce solvent usage. Ultrasonic extraction is also used to assist extraction. After extraction, the extract is filtered through an ultrafiltration membrane to separate impurities such as pectin and cellulose.

[0003] For example, the invention with publication number CN117531270B, in the field of plant extraction equipment technology, discloses an ultrasonic countercurrent extraction equipment slag removal device. This device has a rotating component inside a first housing, an anti-clogging component inside a second housing, and a filter component and a slag removal unit inside a fourth housing. The slag removal unit is located on one side of the first filter screen. A motor is installed in the fourth housing, and the motor's output shaft is fixedly connected to a second rotating shaft. Multiple sets of stirring blades are fixedly connected to the outside of the second rotating shaft. In use, the larger plant extraction slag is scooped up by the spiral plate of the rotating component, and then the plant extract flows into the fourth housing. The filter component retains the smaller extraction fragments, while the stirring blades fixed to the outside of the second rotating shaft agitate the plant extract, preventing the plant extraction slag from adhering to the inner wall of the fourth housing.

[0004] Based on the above cases and actual situations, we have identified the following problems: During countercurrent extraction, the fruit peel material and solvent are usually in continuous relative flow. After the fruit peel material is extracted by the solvent, the residue needs to be collected at the end of the fruit peel material's movement. However, during the extraction process, the end of the fruit peel material's movement is usually the solvent inlet. At the same time, the fruit peel material is in constant contact with the solvent within the extraction section. Therefore, the fruit peel residue inevitably carries solvent as it passes through the end. If the fruit peel residue is directly sent to the residue bin for collection, the excess solvent carried by the fruit peel residue will not only affect subsequent residue processing but also waste solvent. Summary of the Invention

[0005] The purpose of this invention is to provide a fruit peel tea extract preparation equipment and process using acoustic countercurrent extraction combined with membrane separation technology. By setting up a slag extrusion structure, excess solvent in the residue is directly squeezed out and collected for recycling during slag discharge. In addition, a dredging structure is used to dredge the slag extrusion structure to avoid the inability to effectively squeeze out excess solvent, thereby solving the above-mentioned problems of the prior art.

[0006] To achieve the above objectives, the present invention provides a fruit peel tea extract preparation device using ultrasonic countercurrent extraction combined with membrane separation technology, comprising an extraction section for countercurrent extraction of fruit peel, several ultrasonic generators for auxiliary extraction disposed on the side wall of the extraction section, and a membrane filtration assembly disposed on the right side of the extraction section for filtering the extract. The rear end of the extraction section is connected to a slag discharge assembly for collecting fruit peel residue and residual solvent. The slag discharge assembly includes a slag discharge box, a slag squeezing structure disposed on the front side of the slag discharge box, and a dredging structure disposed in the middle of the slag squeezing structure. The slag extrusion structure includes a slag extrusion cylinder and a slag extrusion auger disposed inside the slag extrusion cylinder. The slag extrusion cylinder is vertically upward and has a frustum-shaped shrink hood in the middle. The outer wall of the shrink hood is regularly provided with several water outlet holes. The unblocking structure includes a rotating cover sleeved outside the shrink cover, several movable plates regularly arranged outside the shrink cover, and several push plates fixed to the inner wall of the rotating cover. The outer wall of the shrink cover is provided with three outrigger plates from top to bottom. The shrink cover is divided into sections by the three outrigger plates. Several movable plates are regularly arranged on the three sections of the outer wall of the shrink cover, and several movable plates on the same side are slidably connected to the outrigger plates above them. Several unblocking rods are provided on the inner side wall of the movable plates, corresponding one-to-one with the positions of several water outlets.

[0007] In this setup, considering that the fruit peel material and solvent are typically in continuous relative flow during countercurrent extraction, residue needs to be collected at the end of the peel material's movement after solvent extraction. However, this end is usually the solvent inlet, so the residue inevitably carries solvent with it. Directly sending the residue into the residue bin for collection would not only affect subsequent residue processing but also waste solvent. Therefore, this equipment incorporates a slag-squeezing structure to directly squeeze out excess solvent from the residue during discharge, collecting and reusing it. A clearing structure further unclogs the slag-squeezing structure to prevent blockage of the outlet holes and ensure effective extraction of excess solvent.

[0008] In the technical solution of the present invention, the extraction part is provided with an upward-facing inlet on the front side, the extraction part is provided with an upward-facing outlet pipe on the front side behind the inlet, the extraction part is provided with a downward-facing inlet pipe on the rear side, and the outlet pipe is connected to the opening of the membrane filtration assembly.

[0009] In this setup, by setting up an outlet pipe and an inlet pipe, the solvent flows in the opposite direction to the movement of the fruit peel raw material, forming countercurrent extraction. This maintains the solid and liquid phases at the maximum concentration gradient, thereby improving extraction efficiency and reducing solvent consumption.

[0010] In the technical solution of the present invention, the slag discharge box is divided into a front liquid discharge chamber and a rear residue chamber by a vertically fixed partition plate. The front wall of the liquid discharge chamber is provided with a connecting port, which connects the extraction part and the bottom of the slag squeezing cylinder. The lowest point of the shrink hood is higher than the highest point of the extraction part. An outer cylinder cover is connected above the liquid discharge chamber. The slag squeezing cylinder is vertically upward and its upper half is located inside the outer cylinder cover.

[0011] In this setup, by setting the lowest point of the shrink hood higher than the highest point of the extraction section, solvent leakage from the shrink hood at the beginning can be prevented, thus avoiding the inability to perform countercurrent extraction. The outer casing facilitates the collection of fruit peel residue after pressing.

[0012] In the technical solution of the present invention, a drain port is connected to the rear side of the bottom surface of the drain chamber, a servo motor is fixed to the middle of the outer bottom surface of the drain chamber, the output shaft of the servo motor passes through the bottom surface of the drain chamber and the bottom surface of the slag extrusion cylinder in sequence and is coaxially fixedly connected to the slag extrusion auger, and the top surface of the slag extrusion auger is rotatably connected to the inner top surface of the outer cylinder cover.

[0013] In this setup, a servo motor is used to drive the auger to rotate and move the fruit peel residue during slag discharge.

[0014] In the technical solution of the present invention, the bottom surface of the slag extrusion cylinder is closed and the top surface is open. A slag discharge space is left between the top surface of the slag extrusion cylinder and the inner top surface of the outer cylinder cover. A plurality of slag pushing plates are arranged in a ring-shaped regular arrangement between the top surface of the slag extrusion cylinder and the inner top surface of the outer cylinder cover. The plurality of slag pushing plates are fixedly connected to the rod wall of the slag extrusion auger. An inclined baffle is provided between the top of the slag extrusion cylinder and the outer cylinder cover. The top surface of the residue chamber is connected to a slag inlet channel. The top surface of the slag inlet channel is connected to the inside of the outer cylinder cover, and the connection point corresponds to the position of the baffle.

[0015] In this setup, by installing a slag pusher plate and a baffle, when the fruit peel residue moves to the top of the outer cylinder cover during slag discharge, it slides out of the slag extrusion cylinder under the pusher plate, and enters the residue chamber for centralized collection and treatment through the slag inlet channel under the action of the baffle and gravity.

[0016] In the technical solution of the present invention, a transmission rod is provided on the rear side of the slag extrusion cylinder. The upper and lower ends of the transmission rod are respectively coaxially fixed with a second driving tooth and a first driven tooth. The central shaft of the slag extrusion auger is coaxially fixed with a first driving tooth near the bottom. The first driving tooth meshes with the first driven tooth. The top of the rotating cover is rotatably connected to the inner wall of the outer cylinder cover. The outer wall of the rotating cover is coaxially fixed with a second driven tooth near the top. The second driven tooth meshes with the second driving tooth. A protective cover is fixed near the bottom of the discharge chamber. The first driving tooth and the first driven tooth are arranged inside the protective cover. The outer top surface of the protective cover is inclined with a high center and a low periphery.

[0017] In this configuration, a transmission rod is installed so that when the slag-extruding auger rotates, the rotating cover is driven to rotate through the sequential transmission of the first driving tooth, the first driven tooth, the transmission rod, the second driving tooth, and the second driven tooth. A protective cover is installed to prevent excess solvent carrying fruit peel residue from affecting the transmission of the first driving tooth and the first driven tooth. The top surface of the protective cover is inclined, with a higher center and lower periphery, to prevent excess solvent from remaining above the protective cover.

[0018] In the technical solution of the present invention, the outer wall of the rotating cover and the shrinking cover have the same inclination angle, the movable plate is inclined along the generatrix of the shrinking cover, a locking block is fixed on the top surface of the movable plate, sliders are fixed on the left and right sides of the locking block, the bottom surface of the extension plate is provided with locking block grooves corresponding to a plurality of the locking blocks, and sliding grooves are provided in the groove walls on the left and right sides of the locking block grooves.

[0019] In this setup, by setting the outer wall inclination angles of the rotating cover and the contraction cover to be the same, the vertical distance between the rotating cover and the contraction cover is ensured to be the same, thereby ensuring that all push plates can contact the movable plate. By setting the movable plate to be inclined along the generatrix of the contraction cover, the movable plate can fit against the outer wall of the contraction cover when pushed by the push plates without obstructing the unclogging rod from entering the outlet hole. By setting the sliding groove and the locking block groove, the sliding of the locking block is limited, preventing the locking block from shaking and thus preventing the unclogging rod from entering the outlet hole.

[0020] In the technical solution of the present invention, the water outlet is inclined with the inner side higher and the outer side lower, the chute is arranged parallel to the water outlet, and the unblocking rod is arranged parallel to the water outlet.

[0021] In this design, the water outlet is inclined with the inner side higher than the outer side to prevent excess solvent flowing out from the top from entering the lower water outlet and flowing back into the slag extrusion cylinder, thus affecting the extrusion efficiency. By setting the chute, water outlet, and unblocking rod to be parallel, the sliding of the movable plate is matched with the inclination angle of the water outlet, ensuring that the movable plate can drive the unblocking rod into the water outlet.

[0022] In the technical solution of the present invention, a sliding rod is fixed between the front and rear inner sidewalls of the slide groove, the sliding rod passes through the corresponding slider and the two are slidably connected, and a spring is sleeved on the sidewall portion of the sliding rod located between the rear sidewall of the slide groove and the corresponding slider.

[0023] In this setup, a spring is used so that when the rotating cover drives the push plate to rotate until it separates from the movable plate, the compressed spring will push the movable plate to slide downwards along the slide rod and reset. At this time, the water outlet is fully open, and excess solvent can flow out along the water outlet.

[0024] On the other hand, the present invention also provides a process for preparing fruit peel tea extract using acoustic countercurrent extraction combined with membrane separation technology, and the fruit peel tea extract preparation equipment using the above-mentioned acoustic countercurrent extraction combined with membrane separation technology includes the following steps: S1. The solvent is pumped into the extraction section through the inlet pipe until the extraction section is completely filled. Then, the fruit peel raw material is continuously fed into the extraction section through the feed port. At the same time, the pump of the outlet pipe is started. At this time, the solvent is continuously introduced into the inlet pipe, so that the fruit peel raw material moves from front to back and the solvent moves from back to front. Under the action of the pump of the outlet pipe, the solvent enters the membrane filtration module for filtration and separation to obtain high-purity solvent. Then, the solvent is concentrated and freeze-dried. S2. During the continuous extraction of fruit peel tea extract, when the fruit peel residue enters the slag squeezing cylinder through the connecting port, the servo motor is started to drive the slag squeezing auger to rotate and push the fruit peel residue upward through the shrink hood. As the volume of the shrink hood gradually decreases, the fruit peel residue can be squeezed to discharge excess solvent. The excess solvent is discharged from the bottom of the draining chamber for collection and reuse. When the fruit peel residue moves to the top of the outer cylinder cover, it slides out of the slag squeezing cylinder under the push of the slag pusher plate, and enters the residue chamber through the slag inlet channel for centralized collection and treatment under the action of baffle and gravity. S3. When the slag squeezing auger rotates, it drives the first active tooth to rotate synchronously, and drives the rotating cover to rotate through the sequential transmission of the first driven tooth, the transmission rod, the second active tooth and the second driven tooth. When the rotating cover drives the push plate to rotate to contact the movable plate, it pushes the movable plate to slide upward along the slide rod so that the unblocking rod enters the corresponding water outlet hole for unblocking. S4. When the rotating cover drives the push plate to rotate until it separates from the movable plate, the compressed spring will push the movable plate to slide downward along the slide rod and reset. At this time, the water outlet is fully open and excess solvent can flow out along the water outlet.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting up a slag-squeezing structure, when fruit peel residue enters the slag-squeezing cylinder through the connecting port, the servo motor is started to drive the slag-squeezing auger to rotate and push the fruit peel residue upward through the shrink hood. As the volume of the shrink hood gradually decreases, the fruit peel residue can be squeezed and excess solvent is discharged from the water outlet. The excess solvent is discharged from the bottom of the drain chamber for collection and reuse, which achieves the technical effect of reducing solvent waste. When the fruit peel residue moves to the top of the outer cylinder cover, it slides out of the slag-squeezing cylinder under the push of the slag-pushing plate, and enters the residue chamber for centralized collection and treatment through the slag inlet channel under the action of the baffle and gravity.

[0026] 2. In this invention, by setting up a dredging structure, when the slag-squeezing auger rotates, it synchronously drives the first active tooth to rotate, and through the sequential transmission of the first driven tooth, the transmission rod, the second active tooth, and the second driven tooth, it drives the rotating cover to rotate. When the rotating cover drives the push plate to rotate until it contacts the movable plate, it pushes the movable plate to slide upward along the slide rod, so that the dredging rod enters the corresponding water outlet hole for dredging. When the rotating cover drives the push plate to rotate until it separates from the movable plate, the compressed spring will push the movable plate to reset, open the water outlet hole, and the excess solvent can flow out along the water outlet hole, avoiding the fruit peel residue from clogging the water outlet hole during squeezing and thus preventing the excess solvent from being effectively discharged. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the extraction component and the slag discharge component of the present invention; Figure 3 This is a schematic diagram of the interior of the slag discharge box in this invention; Figure 4 This is a schematic diagram of the interior of the slag extrusion cylinder in this invention; Figure 5 This is a cross-sectional view of the slag extrusion cylinder in this invention; Figure 6 This is a schematic diagram of the shrink shield in this invention; Figure 7 This is another schematic diagram of the shrink shield in this invention; Figure 8 This is a cross-sectional view of the partition plate in this invention; Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of the movable plate in this invention; Explanation of reference numerals in the attached figures: 100. Extraction section; 101. Feed inlet; 102. Liquid inlet pipe; 103. Liquid outlet pipe; 104. Ultrasonic generator; 200. Membrane filtration module; 300. Slag discharge assembly; 301. Slag discharge box; 302. Connecting port; 303. Liquid discharge chamber; 304. Residue chamber; 305. Slag inlet channel; 306. Protective cover; 310. Slag squeezing structure; 311. Outer cylinder cover; 312. Slag squeezing cylinder; 3121. Shrinkage cover; 3122. Outer extension plate; 3123. Water outlet; 313. Slag pusher plate; 314. Baffle; 315. Servo motor; 316. Slag squeezing Screw auger; 3161, first driving gear; 320, unblocking structure; 321, rotating cover; 3211, second driven gear; 322, movable plate; 3221, unblocking rod; 3222, locking block; 3223, slider; 323, push plate; 324, locking block groove; 325, sliding groove; 326, sliding rod; 327, spring; 328, transmission rod; 3281, first driven gear; 3282, second driving gear. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0029] Unless otherwise expressly stated, throughout this specification, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0030] Reference Figures 1-10 As shown, this embodiment provides a technical solution: A fruit peel tea extract preparation device combining ultrasonic countercurrent extraction and membrane separation technology includes an extraction section 100 for countercurrent extraction of fruit peel, several ultrasonic generators 104 disposed on the side wall of the extraction section 100, and a membrane filtration assembly 200 disposed on the right side of the extraction section 100 for filtering the extract. The extraction section 100 is generally tubular and has an internal auger for driving the movement of the fruit peel raw material.

[0031] Since the cells in the fruit peel usually contain cell walls, the cavitation effect generated by the ultrasonic generator 104 assists in extraction, improving extraction efficiency. Because the fruit peel raw material is usually pulverized before extraction, the solvent may inevitably carry fruit peel particles during countercurrent extraction. Simultaneously, impurities such as polysaccharides from the fruit peel may also enter the solvent in small amounts. To ensure the purity of the fruit peel tea extract, the solvent is generally filtered and separated using a membrane filtration assembly 200. The extraction unit 100, the ultrasonic generator 104, and the membrane filtration assembly 200 are all existing technologies in the field and will not be described in detail here. The solvent is usually food-grade deionized water, or food-grade deionized water mixed with a small amount of food-grade ethanol; the specific choice depends on the type of fruit peel and will not be elaborated upon here.

[0032] Additionally, the rear end of the extraction unit 100 is connected to a slag discharge assembly 300, which includes a slag discharge box 301, a slag squeezing structure 310 disposed on the front side of the slag discharge box 301, and a dredging structure 320 disposed in the middle of the slag squeezing structure 310. The slag discharge assembly 300 is used to collect fruit peel residue and residual solvent.

[0033] Specifically, the slag extrusion structure 310 includes a slag extrusion cylinder 312 and a slag extrusion auger 316 disposed inside the slag extrusion cylinder 312. The slag extrusion cylinder 312 is vertically upward and has a truncated cone-shaped shrinkage hood 3121 in the middle. The outer wall of the shrinkage hood 3121 is regularly provided with several water outlet holes 3123. After the fruit peel residue enters the slag extrusion cylinder 312, the slag extrusion auger 316 will drive the fruit peel residue to rise to the shrinkage hood 3121. The shrinkage hood 3121 is a truncated cone shape that is narrow at the top and wide at the bottom. During the rising process of the fruit peel residue, the volume gradually decreases, which can squeeze the fruit peel residue and discharge excess solvent for recycling, thereby reducing solvent waste.

[0034] In addition, the unblocking structure 320 includes a rotating cover 321 sleeved outside the shrink cover 3121, a number of movable plates 322 regularly arranged outside the shrink cover 3121, and a number of push plates 323 fixed to the inner wall of the rotating cover 321. The outer wall of the shrink hood 3121 is provided with three extension plates 3122 from top to bottom. The shrink hood 3121 is divided into three sections by the three extension plates 3122. Several movable plates 322 are regularly arranged on the three sections of the outer wall of the shrink hood 3121. Several movable plates 322 on the same side are slidably connected to the extension plates 3122 above them. Several unblocking rods 3221 are provided on the inner wall of the movable plates 322, which correspond one-to-one with the positions of several water outlets 3123. The size of the water outlets 3123 and the size of the unblocking rods 3221 are matched. After the unblocking rods 3221 are inserted into the water outlets 3123, the inner end face of the unblocking rods 3221 is flush with the inner wall of the slag extrusion cylinder 312 to avoid collision between the slag extrusion auger 316 and the unblocking rods 3221.

[0035] When the shrink hood 3121 squeezes the fruit peel residue, the fruit peel residue may block the water outlet 3123. At this time, the rotating hood 321 rotates, which drives the push plate 323 to continuously push the various movable plates 322, thereby driving the unblocking rod 3221 into the water outlet 3123 to unblock it, so that the whole device can run continuously without interruption.

[0036] Please see Figure 1As shown, the extraction section 100 has an upward-facing inlet 101 at its front side, an upward-facing outlet pipe 103 at its rear side, and a downward-facing inlet pipe 102 at its rear end. The outlet pipe 103 is connected to the opening of the membrane filtration assembly 200. By setting the outlet pipe 103 and the inlet pipe 102, the solvent flow is opposite to the movement of the fruit peel raw material, forming countercurrent extraction. This maintains the solid and liquid phases at the maximum concentration gradient, thereby improving extraction efficiency and reducing solvent consumption. This is a conventional countercurrent extraction technology, which will not be elaborated here.

[0037] Please see Figures 2-3 As shown, the slag discharge box 301 is divided into a front drainage chamber 303 and a rear residue chamber 304 by a vertically fixed partition plate. The front wall of the drainage chamber 303 is provided with a connecting port 302, which connects the extraction section 100 and the bottom of the extrusion cylinder 312. The feeding auger in the extraction section 100 extends into the connecting port 302 to ensure that the fruit peel residue can enter the extrusion cylinder 312.

[0038] Specifically, the lowest point of the shrink shroud 3121 is higher than the highest point of the extraction section 100. When solvent is initially introduced, the extraction section 100 needs to be filled with solvent. The extrusion cylinder 312 is connected to the shrink shroud 3121. The high position of the shrink shroud 3121 prevents solvent from leaking directly outwards at the beginning, thus preventing countercurrent extraction. An outer cylinder cover 311 is connected above the drainage chamber 303. The extrusion cylinder 312 is vertically upwards, with its upper half located inside the outer cylinder cover 311. The outer cylinder cover 311 facilitates the collection of extruded fruit peel residue.

[0039] Please see Figures 4-5 As shown, the bottom surface of the drainage chamber 303 is connected to a drainage port on the rear side. The drainage port facilitates the discharge of excess solvent for collection and reuse.

[0040] Furthermore, a servo motor 315 is fixed to the middle of the outer bottom surface of the drainage chamber 303. The output shaft of the servo motor 315 passes through the bottom surface of the drainage chamber 303 and the bottom surface of the slag-squeezing cylinder 312, and is coaxially and fixedly connected to the slag-squeezing auger 316. The top surface of the slag-squeezing auger 316 is rotatably connected to the inner top surface of the outer cylinder cover 311. By setting the servo motor 315, during slag discharge, the servo motor 315 is started to drive the slag-squeezing auger 316 to rotate and push the fruit peel residue to move.

[0041] Furthermore, the bottom of the slag extrusion cylinder 312 is closed, while the top is open, leaving a slag discharge space between the top surface of the slag extrusion cylinder 312 and the inner top surface of the outer cylinder cover 311. A series of slag pushing plates 313 are arranged in a ring-shaped pattern between the top surface of the slag extrusion cylinder 312 and the inner top surface of the outer cylinder cover 311, and these plates are fixedly connected to the rod wall of the slag extrusion auger 316. An inclined baffle 314 is provided between the top of the slag extrusion cylinder 312 and the outer cylinder cover 311. A slag inlet channel 305 is connected to the top surface of the residue chamber 304, and the top surface of the slag inlet channel 305 is connected to the interior of the outer cylinder cover 311, with the connection point corresponding to the position of the baffle 314.

[0042] By setting up a slag pusher plate 313 and a baffle plate 314, when the fruit peel residue moves to the top of the outer cylinder cover 311 during slag discharge, it slides out of the slag extrusion cylinder 312 under the push of the slag pusher plate 313, and enters the residue chamber 304 for centralized collection and treatment through the slag inlet channel 305 under the action of the baffle plate 314 and gravity.

[0043] Additionally, a transmission rod 328 is provided on the rear side of the slag extrusion cylinder 312. A second driving tooth 3282 and a first driven tooth 3281 are coaxially fixed at the upper and lower ends of the transmission rod 328, respectively. A first driving tooth 3161 is coaxially fixed near the bottom of the central shaft of the slag extrusion auger 316, and the first driving tooth 3161 meshes with the first driven tooth 3281. The top of the rotating cover 321 is rotatably connected to the inner wall of the outer cylinder cover 311. A second driven tooth 3211 is coaxially fixed near the top of the outer wall of the rotating cover 321, and the second driven tooth 3211 meshes with the second driving tooth 3282. By providing the transmission rod 328, when the slag extrusion auger 316 rotates, the rotating cover 321 can be driven to rotate through the sequential transmission of the first driving tooth 3161, the first driven tooth 3281, the transmission rod 328, the second driving tooth 3282, and the second driven tooth 3211.

[0044] Furthermore, a protective cover 306 is fixed to the bottom of the drainage chamber 303. The first driving tooth 3161 and the first driven tooth 3281 are disposed inside the protective cover 306. The outer top surface of the protective cover 306 is inclined with a higher center and a lower periphery. By setting the protective cover 306, the transmission of the first driving tooth 3161 and the first driven tooth 3281 is prevented from being affected by fruit peel residue carried by excess solvent. The inclined shape of the top surface of the protective cover 306, with a higher center and a lower periphery, can prevent excess solvent from remaining above the protective cover 306.

[0045] Please see Figures 6-10 As shown, the outer wall inclination angles of the rotating cover 321 and the shrinking cover 3121 are the same, ensuring that the vertical distance between the rotating cover 321 and the shrinking cover 3121 is the same, thereby ensuring that all push plates 323 can contact the movable plate 322.

[0046] In addition, the movable plate 322 is inclined along the generatrix of the shrinkage cover 3121. The generatrix is ​​the line segment connecting any point on the circumference of the bottom surface of the frustum and the corresponding point on the circumference of the bottom surface. All generatrixes, when extended, will intersect at the same point, which is the vertex of the original cone. This is the basic geometric knowledge of cones and frustums, which will not be elaborated here. This allows the movable plate 322 to fit against the outer wall of the shrinkage cover 3121 when pushed by the push plate 323 without blocking the unblocking rod 3221 from entering the water outlet 3123.

[0047] A locking block 3222 is fixed to the top surface of the movable plate 322, and sliders 3223 are fixed to the left and right sides of the locking block 3222. The bottom surface of the extended plate 3122 is provided with locking block grooves 324 corresponding to several locking blocks 3222. The front-to-back width of the locking block groove 324 is greater than the front-to-back width of the locking block 3222 so that the locking block 3222 can slide within the locking block groove 324. Sliding grooves 325 are provided in the groove walls on the left and right sides of the locking block groove 324. By setting the sliding grooves 325 and the locking block grooves 324, the sliding of the locking block 3222 is limited, preventing the locking block 3222 from shaking and failing to drive the unblocking rod 3221 into the water outlet 3123.

[0048] Specifically, the water outlet 3123 is inclined with the inner side higher than the outer side to prevent excess solvent flowing out from the top from entering the lower water outlet 3123 and flowing back into the slag extrusion cylinder 312, thus affecting the extrusion efficiency. The chute 325 is arranged parallel to the water outlet 3123, and the unblocking rod 3221 is also arranged parallel to the water outlet 3123. This ensures that the sliding of the movable plate 322 matches the inclination angle of the water outlet 3123, preventing the movable plate 322 from failing to drive the unblocking rod 3221 into the water outlet 3123.

[0049] In addition, a slide rod 326 is fixed between the front and rear inner walls of the slide groove 325. The slide rod 326 passes through the corresponding slider 3223 and the two are slidably connected. A spring 327 is sleeved on the side wall portion of the slide rod 326 between the rear wall of the slide groove 325 and the corresponding slider 3223. By setting the spring 327, when the rotating cover 321 drives the push plate 323 to rotate until it separates from the movable plate 322, the compressed spring 327 will push the movable plate 322 to slide downward along the slide rod 326 and reset. At this time, the water outlet 3123 is fully opened, and excess solvent can flow out along the water outlet 3123.

[0050] The fruit peel tea extract preparation process of the present invention, which uses the above-mentioned fruit peel tea extract preparation equipment based on the acoustic countercurrent extraction combined with membrane separation technology, includes the following steps: S1. Solvent is pumped into the extraction section 100 through the inlet pipe 102 until the extraction section 100 is completely filled. Then, fruit peel raw material is continuously fed into the extraction section 100 through the feed port 101. At the same time, the pump of the outlet pipe 103 is started. At this time, the solvent is continuously introduced into the inlet pipe 102, causing the fruit peel raw material to move from front to back and the solvent to move from back to front, so that the two move in opposite directions, forming countercurrent extraction. Under the action of the pump of the outlet pipe 103, the solvent enters the membrane filtration module 200 for filtration and separation to obtain high-purity solvent. Then, the solvent is concentrated and freeze-dried. S2. During the continuous extraction of fruit peel tea extract, when the fruit peel residue enters the slag extrusion cylinder 312 through the connecting port 302, the servo motor 315 is started to drive the slag extrusion auger 316 to rotate and push the fruit peel residue upward through the shrink hood 3121. As the volume of the shrink hood 3121 gradually decreases, the fruit peel residue can be squeezed to discharge excess solvent. The excess solvent is discharged from the bottom of the discharge chamber 303 for collection and reuse. When the fruit peel residue moves to the top of the outer cylinder hood 311, it slides out of the slag extrusion cylinder 312 under the push of the slag pusher 313, and enters the residue chamber 304 for centralized collection and treatment through the slag inlet channel 305 under the action of the baffle 314 and gravity. S3. When the slag squeezing auger 316 rotates, it drives the first active tooth 3161 to rotate synchronously. Through the sequential transmission of the first driven tooth 3281, the transmission rod 328, the second active tooth 3282, and the second driven tooth 3211, it drives the rotating cover 321 to rotate. When the rotating cover 321 drives the push plate 323 to rotate until it contacts the movable plate 322, it pushes the movable plate 322 to slide upward along the slide rod 326, so that the unblocking rod 3221 enters the corresponding water outlet 3123 for unblocking. S4. When the rotating cover 321 drives the push plate 323 to rotate until it separates from the movable plate 322, the compressed spring 327 will push the movable plate 322 to slide downward along the slide rod 326 and reset. At this time, the water outlet 3123 is fully opened, and excess solvent can flow out along the water outlet 3123.

[0051] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A device for producing fruit peel tea extract using ultrasonic countercurrent extraction combined with membrane separation technology, comprising an extraction unit for countercurrent extraction of fruit peel, several ultrasonic generators for auxiliary extraction disposed on the side wall of the extraction unit, and a membrane filtration assembly disposed on the right side of the extraction unit for filtering the extract, characterized in that: The rear end of the extraction section is connected to a slag discharge assembly for collecting fruit peel residue and residual solvent. The slag discharge assembly includes a slag discharge box, a slag squeezing structure located on the front side inside the slag discharge box, and a dredging structure located in the middle of the slag squeezing structure. The slag extrusion structure includes a slag extrusion cylinder and a slag extrusion auger disposed inside the slag extrusion cylinder. The slag extrusion cylinder is vertically upward and has a frustum-shaped shrink hood in the middle. The outer wall of the shrink hood is regularly provided with several water outlet holes. The unblocking structure includes a rotating cover fitted outside the shrink cover, several movable plates regularly arranged outside the shrink cover, and several push plates fixed to the inner wall of the rotating cover. The outer wall of the shrink cover has three outriggers arranged from top to bottom. The shrink cover is divided into three sections by the three outriggers. Several movable plates are regularly arranged on the three sections of the outer wall of the shrink cover, and several movable plates on the same side are slidably connected to the outriggers above them. Several unblocking rods are provided on the inner wall of the movable plates, corresponding one-to-one with the positions of several water outlets.

2. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 1, characterized in that: The extraction section has an upward-facing inlet on its front side, an upward-facing outlet pipe on its front side behind the inlet, and a downward-facing inlet pipe on its rear side. The outlet pipe is connected to the opening of the membrane filtration assembly.

3. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 2, characterized in that: The slag discharge box is divided into a front discharge chamber and a rear residue chamber by a vertically fixed partition plate. The front wall of the discharge chamber has a connecting port, which connects the extraction part and the bottom of the slag squeezing cylinder. The lowest point of the shrink hood is higher than the highest point of the extraction part. An outer cylinder cover is connected above the discharge chamber. The slag squeezing cylinder is vertically upward and its upper half is located inside the outer cylinder cover.

4. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 3, characterized in that: The bottom surface of the drainage chamber is connected to the rear side of the drainage port. A servo motor is fixed to the middle of the outer bottom surface of the drainage chamber. The output shaft of the servo motor passes through the bottom surface of the drainage chamber and the bottom surface of the slag extrusion cylinder in sequence and is coaxially and fixedly connected to the slag extrusion auger. The top surface of the slag extrusion auger is rotatably connected to the inner top surface of the outer cylinder cover.

5. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 4, characterized in that: The bottom of the slag extrusion cylinder is closed and the top is open. A slag discharge space is left between the top surface of the slag extrusion cylinder and the inner top surface of the outer cylinder cover. A number of slag pushing plates are arranged in a ring between the top surface of the slag extrusion cylinder and the inner top surface of the outer cylinder cover. The number of slag pushing plates are fixedly connected to the rod wall of the slag extrusion auger. An inclined baffle is provided between the top of the slag extrusion cylinder and the outer cylinder cover. The top surface of the residue chamber is connected to a slag inlet channel. The top surface of the slag inlet channel is connected to the inside of the outer cylinder cover, and the connection point corresponds to the position of the baffle.

6. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 5, characterized in that: A transmission rod is provided on the rear side of the slag extrusion cylinder. The upper and lower ends of the transmission rod are respectively coaxially fixed with a second driving tooth and a first driven tooth. The central shaft of the slag extrusion auger is coaxially fixed with a first driving tooth near the bottom. The first driving tooth meshes with the first driven tooth. The top of the rotating cover is rotatably connected to the inner wall of the outer cylinder cover. The outer wall of the rotating cover is coaxially fixed with a second driven tooth near the top. The second driven tooth meshes with the second driving tooth. A protective cover is fixed near the bottom of the discharge chamber. The first driving tooth and the first driven tooth are arranged inside the protective cover. The outer top surface of the protective cover is inclined with a high center and a low periphery.

7. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 6, characterized in that: The rotating cover and the shrinking cover have the same inclination angle on their outer walls. The movable plate is inclined along the generatrix of the shrinking cover. A locking block is fixed on the top surface of the movable plate. Sliding blocks are fixed on the left and right sides of the locking block. The bottom surface of the extension plate is provided with locking block grooves that correspond one-to-one with the locking blocks. Sliding grooves are provided in the groove walls on the left and right sides of the locking block grooves.

8. The fruit peel tea extract preparation equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 7, characterized in that: The water outlet is inclined with the inner side higher than the outer side, the chute is arranged parallel to the water outlet, and the unblocking rod is arranged parallel to the water outlet.

9. The equipment for producing fruit peel tea extract using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 8, characterized in that: A sliding rod is fixed between the front and rear inner sidewalls of the slide groove. The sliding rod passes through the corresponding slider and the two are slidably connected. A spring is sleeved on the sidewall portion of the sliding rod located between the rear sidewall of the slide groove and the corresponding slider.

10. A process for producing fruit peel tea extract using acoustic countercurrent extraction combined with membrane separation technology, employing the fruit peel tea extract production equipment using the acoustic countercurrent extraction combined with membrane separation technology as described in claim 9, characterized in that... Includes the following steps: S1. Solvent is pumped into the extraction section through the inlet pipe until the extraction section is completely filled. Then, fruit peel raw material is continuously fed into the extraction section through the feed port. At the same time, the pump of the outlet pipe is started. At this time, the solvent is continuously introduced into the inlet pipe, causing the fruit peel raw material to move from front to back and the solvent to move from back to front, so that the two move in opposite directions, forming countercurrent extraction. Under the action of the pump of the outlet pipe, the solvent enters the membrane filtration module for filtration and separation to obtain high-purity solvent. Then, the solvent is concentrated and freeze-dried. S2. During the continuous extraction of fruit peel tea extract, when the fruit peel residue enters the slag squeezing cylinder through the connecting port, the servo motor is started to drive the slag squeezing auger to rotate and push the fruit peel residue upward through the shrink hood. As the volume of the shrink hood gradually decreases, the fruit peel residue can be squeezed to discharge excess solvent. The excess solvent is discharged from the bottom of the draining chamber for collection and reuse. When the fruit peel residue moves to the top of the outer cylinder cover, it slides out of the slag squeezing cylinder under the push of the slag pusher plate, and enters the residue chamber through the slag inlet channel for centralized collection and treatment under the action of baffle and gravity. S3. When the slag squeezing auger rotates, it drives the first active tooth to rotate synchronously, and drives the rotating cover to rotate through the sequential transmission of the first driven tooth, the transmission rod, the second active tooth and the second driven tooth. When the rotating cover drives the push plate to rotate to contact the movable plate, it pushes the movable plate to slide upward along the slide rod so that the unblocking rod enters the corresponding water outlet hole for unblocking. S4. When the rotating cover drives the push plate to rotate until it separates from the movable plate, the compressed spring will push the movable plate to slide downward along the slide rod and reset. At this time, the water outlet is fully open and excess solvent can flow out along the water outlet.

Images