Eluent spray dryer in anthocyanin extraction and anthocyanin preparation method

Abstract

The invention relates to the technical field of spray dryers, discloses an eluent spray dryer in anthocyanin extraction and an anthocyanin preparation method, and solves the problem that anthocyanin particles are easy to agglomerate in a wall scraping process. Through the arrangement of a lifting component, an air blowing component B and a material hanging component in the drying mechanism, in the eluent drying process, wall scraping work is conducted downwards in a reciprocating mode through four sets of equidistant silica gel pads and a mounting arc plate, through the arrangement of multiple sets of short-distance material hanging structures, anthocyanin particles are preliminarily prevented from being agglomerated, and in the lifting process, the anthocyanin particles are prevented from being agglomerated; air in an air storage pipe B is discharged from an air conveying pipe B through extrusion and is sprayed out through an air channel spray head, the scraped anthocyanin particles are scattered, agglomeration is further prevented, and finally the purpose of preventing agglomeration of the anthocyanin particles in the wall scraping process is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spray dryers, in particular to an eluent spray dryer for anthocyanin extraction and an anthocyanin preparation method. Background Art

[0002] The spray dryer is mainly composed of a drying chamber, an atomizer, a hot air system, etc. The drying chamber is made of stable material, resistant to high temperature and corrosion. The atomizer can accurately atomize the eluent into tiny droplets. For example, the pressure atomizer can work stably under a specific pressure. The hot air system can provide hot air with suitable temperature and flow rate to ensure that the eluent droplets are in efficient contact with the hot air in the drying chamber, so that the solvent evaporates quickly and anthocyanins form dry powder, realizing a fast and efficient drying process.

[0003] The existing Chinese patent with publication number CN221867409U discloses a spray dryer, comprising: a tower body, a removable cover plate is provided on the top; a rotating shaft is rotatably sleeved on the outside of the feed pipe; a support plate is fixed to the bottom end of the rotating shaft; a linear motion part is provided in the support plate and its output end is connected to the mounting seat; a scraper, a mounting head is provided at the top end thereof to match the mounting hole on the side of the mounting seat, a fixing rod is slidably penetrated through the sliding hole at the top of the mounting seat, a fixing groove is provided on the upper surface of the mounting head, and a fixing groove is provided on the wall of the sliding hole. A groove is provided in which a locking rod is slidably provided to cooperate with a locking hole on the rod body of the fixing rod, a boss is provided on the periphery of the locking rod to slide with a secondary groove of the groove wall, an electromagnet is provided on the groove wall of the groove away from the fixing rod, and a magnetic suction piece is provided on the end face of the locking rod. The new type provides a spray dryer so that the scraper is always in contact with the inner side wall of the tower body to ensure the scraping and cleaning effect. However, when the device is scraping the wall, the anthocyanin particles scraped off are prone to agglomeration under the continuous rotation of the scraper, which affects the quality of the final product.

[0004] In view of the above problems, a spray dryer for eluent in anthocyanin extraction and a method for preparing anthocyanin are proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an eluent spray dryer for anthocyanin extraction and an anthocyanin preparation method. The device is used to work, thereby solving the problem of anthocyanin particles easily agglomerating during the wall scraping process in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an eluent spray dryer for anthocyanin extraction, comprising a base frame, a material storage barrel and a heater are arranged on the upper surface of the base frame, a liquid pump is arranged inside the material storage barrel, a fan is arranged inside the heater, a cyclone separator for recovering hot air is arranged below the base frame, a drying mechanism for drying and extracting anthocyanin is fixedly connected inside the base frame, a feed pipe is arranged between the material storage barrel and the drying mechanism, an air inlet pipe is fixedly connected between the heater and the drying mechanism, the cyclone separator is connected to one side of the drying mechanism, and a collecting tank for collecting anthocyanin is arranged on the bottom surface of the drying mechanism; The drying mechanism includes a drying cylinder arranged inside the base frame, a fixed block is fixedly connected between the drying cylinder and the inner wall of the base frame, a discharge pipe is fixedly connected to the bottom end of the drying cylinder, a collecting tank is fixedly connected to the bottom end of the discharge pipe, a top box is fixedly connected to the upper surface of the drying cylinder, a motor A is fixedly connected to the inner wall of the top box, a rotating shaft A is fixedly connected to the output end of the motor A, a bevel gear A is fixedly connected to one end of the rotating shaft A, a rotary joint is rotatably connected to one end of the feed pipe, a bevel gear B is fixedly connected to the outer side of the rotary joint, a reciprocating threaded rod is fixedly connected to the bottom surface of the rotary joint, the reciprocating threaded rod is a hollow structure, an atomizing spray disc is fixedly connected to the bottom surface of the reciprocating threaded rod, a sleeve is fixedly connected to the inner wall of the drying cylinder, and the sleeve is sleeved on the reciprocating threaded rod Side grooves are provided on the outside of the grooved rod and the outside of the sleeve, and a lifting component for controlling the lifting is slidably connected to the outside of the sleeve. A connecting vertical rod is fixedly connected to the bottom surface of the lifting component, and a connecting support rod is fixedly connected to one side of the connecting vertical rod. A scraping component for scraping off anthocyanin particles attached to the inner wall of the drying cylinder is fixedly connected to one end of the connecting support rod. Four groups of connecting support rods and scraping components are provided, and the four groups of connecting support rods and scraping components are equidistantly arranged. An air blowing component B for blowing air to disperse anthocyanin is fixedly connected to the upper surface of the lifting component, a partition component for screening agglomerated anthocyanin is provided at the bottom of the drying cylinder, and a powder grinding component for crushing agglomerated anthocyanin is also provided at the bottom of the drying cylinder.

[0007] Furthermore, the lifting component includes a lifting frame slidably connected to the outside of the sleeve, a protrusion is fixedly connected to the inner wall of the lifting frame, the protrusion is slidably connected to the inside of the side groove and slidably connected to the inside of the reciprocating threaded rod, a transverse groove is provided inside the lifting frame, and two groups of the transverse grooves are provided, and the two groups of the transverse grooves are symmetrically arranged, a slider is slidably connected to the inside of the transverse groove, an inner groove is provided on the inner wall of the transverse groove, both sides of the slider are fixedly connected to limit blocks, the limit block is slidably connected to the inside of the inner groove, one side of the limit block is fixedly connected to a spring A, one end of the spring A is fixedly connected to the inner wall of the inner groove, one side of the slider is movably connected to a transverse plate, and one end of the transverse plate is fixedly connected to An inclined block A is connected, an inclined groove is arranged on the inner wall of the transverse groove, one side of the inclined block A is fitted with the inclined groove, compression grooves are arranged on both sides of the inclined block A, a spring B is fixedly connected to the inner wall of the compression groove, one end of the spring B is fixedly connected to a positioning block, the positioning block is slidably connected to the inside of the compression groove, when the reciprocating threaded rod rotates, the lifting frame is driven to reciprocate up and down under the limiting effect of the convex block in the side groove and the rotation transmission effect of the reciprocating threaded rod, a movable groove is arranged on the inner wall of the inclined groove, the movable groove is adapted to the positioning block, a top block is slidably connected to the inside of the movable groove, a limiting disk is fixedly connected to the outer side of the top block, and an inclined block B is fixedly connected to the upper surface of the top block.

[0008] Furthermore, an L-shaped pressure plate is fixedly connected to the outer side of the sleeve, an upper baffle is fixedly connected to the upper surface of the lifting frame, and the L-shaped pressure plate and the upper baffle are arranged correspondingly.

[0009] Furthermore, the scraper component includes a mounting arc plate fixedly connected to one end of the connecting support rod, a silicone pad is fixedly connected to the outer side of the mounting arc plate, the mounting arc plate is a hollow structure, and both the mounting arc plate and the silicone pad are semicircular arc structures.

[0010] Furthermore, the inflation component B includes a side panel fixedly connected to the outside of the lifting frame, and there are two groups of side panels in total. The two groups of side panels are symmetrically arranged, and an air supply pipe B is fixedly connected to the upper surface of the side panel, and an air storage pipe B is sleeved on the outside of the air supply pipe B. A sealing plate B is fixedly connected to the upper end of the air supply pipe B, and a one-way pressure valve D is arranged inside the sealing plate B. A filter A is fixedly connected to the upper end of the air storage pipe B, and a one-way pressure valve C is arranged at the connection between the air storage pipe B and the filter A. The side panel and the interior of the lifting frame are both hollow structures, an air guide hose is fixedly connected to the outside of the slider, and the air guide hose is connected to the interior of the lifting frame, the connecting vertical rod and the connecting support rod are both hollow structures, and a nozzle is fixedly connected to the bottom surface of the mounting arc plate.

[0011] Furthermore, the partition component includes an annular plate fixedly connected to the inner wall of the drying cylinder, a vibration groove is opened on the inner wall of the annular plate, an annular filter is arranged inside the vibration groove, and a spring C is fixedly connected between the annular filter and the inner wall of the vibration groove.

[0012] Furthermore, the grinding component includes an inner box arranged at the bottom of the drying cylinder, a support plate is fixedly connected between the inner box and the inner wall of the drying cylinder, a motor B is arranged inside the inner box, a rotating shaft B is fixedly connected to the output end of the motor B, a conical disk is fixedly connected to one end of the rotating shaft B, the conical disk is arranged inside the annular filter, a grinding roller is rotatably connected to the outer side of the conical disk, and the grinding roller is in contact with the surface of the annular filter.

[0013] Furthermore, magnetic blocks are arranged inside the annular filter screen, and there are two groups of magnetic blocks in total. The two groups of magnetic blocks are symmetrically arranged, and the rolling roller is magnetic, and the rolling roller and the magnetic blocks repel each other magnetically.

[0014] Furthermore, an air blowing component A for replenishing gas to the two groups of scraping components arranged below is provided inside the drying cylinder, and the air blowing component A includes an air supply pipe A fixedly connected to the bottom surface of the mounting arc plate, an air storage pipe A is sleeved on the outside of the air supply pipe A, a sealing plate A is fixedly connected to the bottom surface of the air supply pipe A, a one-way pressure valve B is provided inside the sealing plate A, a breathing valve is provided inside the air storage pipe A, a partition is provided inside the connecting vertical rod, and the partition is provided between the two groups of connecting support rods that are symmetrical up and down.

[0015] The present invention provides another technical solution: providing a method for preparing anthocyanidins, comprising the following steps: S1. Place the plant raw material in clean water and stir gently to remove dust and impurities attached to the surface, then drain the water naturally to remove excess water, use a citric acid aqueous solution with a pH value of 3-5 as an extraction solvent, and fully mix the treated plant raw material with the extraction solvent at a solid-liquid ratio of 1:5, and maintain the temperature range of 30-60° C. for 3 hours. Stir continuously during the extraction to ensure that the raw material is fully in contact with the solvent to promote the dissolution of anthocyanins; S2. After the extraction is completed, the extract is separated from the residue by filtering with filter paper to obtain a preliminary extract, and the extract is concentrated by vacuum distillation. During the vacuum distillation process, the distillation temperature is controlled at 40-50° C. to obtain a concentrated crude extract, and the concentrated crude extract is vacuum dried at a temperature of 30-40° C. to obtain a dry crude extract powder; S3, dissolving the crude extract in a solvent and passing it through a chromatography column filled with an ion exchange resin adsorbent, anthocyanins will be adsorbed by the adsorbent and retained on the chromatography column, while other impurities will flow out with the solvent, and then the anthocyanins adsorbed on the chromatography column will be eluted by adjusting the pH value of the elution solvent, and the eluate containing high-purity anthocyanins will be collected; S4. Use hot air between 120-150°C to circulate inside the spray dryer for preheating. The preheating time is controlled between 20-30 minutes. Use a 0.45-1μm filter to filter the eluent containing anthocyanins, pass it into the spray dryer and spray it out through an atomizing nozzle. Set the inlet air temperature between 150-200°C and the outlet air temperature between 80-110°C. The progress of the drying process and the degree of dryness of the product can be monitored in real time. The atomized eluent is sprayed into the drying chamber and fully contacts with the hot air. Solid components such as anthocyanins gradually form dry powder particles. The hanging structure is used to scrape off the particles attached to the inner wall. Finally, the air flow enters the cyclone separator. The dried anthocyanin powder particles fall into the collection container at the bottom of the drying chamber to complete the preparation work.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The eluent spray dryer for anthocyanin extraction and the anthocyanin preparation method proposed by the present invention have the following advantages: through the arrangement of the lifting component, the air blowing component B and the hanging component in the drying mechanism, in the process of drying the eluent, four groups of equidistant silica gel pads and the installation arc plates are used to scrape the wall reciprocatingly downwards; through the arrangement of the short-distance multi-group hanging structure, the anthocyanin particles are initially prevented from agglomerating; in the lifting process, the air in the air storage pipe B is discharged from the air delivery pipe B by squeezing, and is sprayed out through the airway nozzle to scatter the scraped anthocyanin particles, further preventing agglomeration; the partition component and the grinding component below screen the dried anthocyanin, and drive the filter screen to vibrate while rotating and grinding, so as to ensure that the dropped anthocyanin particles are of qualified size, and finally the purpose of preventing the anthocyanin particles from agglomerating during the wall scraping process and the discharge is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the drying mechanism structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the drying cylinder of the present invention; Figure 4 It is a schematic diagram of the structure of the lifting component of the present invention; Figure 5 It is a schematic diagram of the installation structure of the slider and the horizontal plate of the present invention; Figure 6 It is a schematic diagram of the bottom structure of the lifting component of the present invention; Figure 7 It is a schematic diagram of the top block installation structure of the present invention; Figure 8 It is a structural schematic diagram of the air blowing component B of the present invention; Fig. 9 It is a plan view of the air blowing component B of the present invention; Fig.10 It is a schematic structural diagram of the scraper component of the present invention; Fig.11 It is a schematic diagram of the structure of the grinding component of the present invention; Fig.12 It is a schematic diagram of the structure of the partition component of the present invention; Fig.13 It is a plan view of the inflation component A of the present invention.

[0018] In the figure: 1, bottom frame; 2, drying mechanism; 21, drying cylinder; 211, fixing block; 212, discharge pipe; 213, sleeve; 214, L-shaped pressing plate; 215, side groove; 216, reciprocating threaded rod; 22, top box; 221, motor A; 222, rotating shaft A; 223, bevel gear A; 224, rotary joint; 225, bevel gear B; 23, lifting component; 231, lifting frame; 2311, inner groove; 2312, inclined groove; 2313, upper baffle; 2314, convex block; 232, slider; 233, horizontal plate; 2331, inclined block A; 2332, positioning block; 2333, spring B; 234, limit block; 235, air guide hose; 236, spring A; 237, top block; 2371, inclined block B; 2372, limit plate; 24, scraper component; 241, arc plate installation; 242, silicone pad; 243 , nozzle; 25, connecting vertical rod; 251, connecting support rod; 26, air blowing component A; 261, air supply pipe A; 262, one-way pressure valve A; 263, sealing plate A; 264, one-way pressure valve B; 265, air storage pipe A; 266, breathing valve; 27, air blowing component B; 271, air storage pipe B; 2711, one-way pressure valve C; 272, air supply pipe B; 273, filter A; 274, side plate; 27 5. Sealing plate B; 276. One-way pressure valve D; 28. Partition component; 281. Annular plate; 282. Annular filter; 283. Spring C; 284. Magnetic block; 29. ​​Grinding component; 291. Inner box; 292. Support plate; 293. Conical disk; 294. Grinding roller; 3. Storage barrel; 31. Feed pipe; 4. Heater; 41. Inlet pipe; 5. Cyclone separator; 6. Collecting tank; 7. Atomizing spray disc. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0021] Combination Figure 1-Figure 3 , an anthocyanin extraction eluent spray dryer, comprising a base frame 1, a material storage barrel 3 and a heater 4 are arranged on the upper surface of the base frame 1, a liquid pump is arranged inside the material storage barrel 3, a fan is arranged inside the heater 4, a cyclone separator 5 for recovering hot air is arranged below the base frame 1, a drying mechanism 2 for drying and extracting anthocyanin is fixedly connected inside the base frame 1, a feed pipe 31 is arranged between the material storage barrel 3 and the drying mechanism 2, an air inlet pipe 41 is fixedly connected between the heater 4 and the drying mechanism 2, the cyclone separator 5 is connected to one side of the drying mechanism 2, and a collecting tank 6 for collecting anthocyanin is arranged on the bottom surface of the drying mechanism 2; The drying mechanism 2 includes a drying cylinder 21 arranged inside the base frame 1, a fixed block 211 is fixedly connected between the drying cylinder 21 and the inner wall of the base frame 1, a discharge pipe 212 is fixedly connected to the bottom end of the drying cylinder 21, a collecting tank 6 is fixedly connected to the bottom end of the discharge pipe 212, a top box 22 is fixedly connected to the upper surface of the drying cylinder 21, a motor A221 is fixedly connected to the inner wall of the top box 22, a rotating shaft A222 is fixedly connected to the output end of the motor A221, a bevel gear A223 is fixedly connected to one end of the rotating shaft A222, a rotary joint 224 is rotatably connected to one end of the feed pipe 31, a bevel gear B225 is fixedly connected to the outer side of the rotary joint 224, a reciprocating threaded rod 216 is fixedly connected to the bottom surface of the rotary joint 224, and the reciprocating threaded rod 216 is a hollow structure. The bottom surface is fixedly connected with an atomizing spray disc 7, the inner wall of the drying cylinder 21 is fixedly connected with a sleeve 213, the sleeve 213 is sleeved on the outside of the reciprocating threaded rod 216, a side groove 215 is provided on the outside of the sleeve 213, and a lifting component 23 for controlling the lifting is slidably connected to the outside of the sleeve 213, the bottom surface of the lifting component 23 is fixedly connected with a connecting vertical rod 25, one side of the connecting vertical rod 25 is fixedly connected with a connecting support rod 251, and one end of the connecting support rod 251 is fixedly connected with a scraping component 24 for scraping off anthocyanin particles attached to the inner wall of the drying cylinder 21, and the connecting support rod 251 and the scraping component 24 are both provided with four groups, and the four groups of the connecting support rods 251 and the scraping components 24 are equidistantly arranged, and the upper surface of the lifting component 23 is fixedly connected with a The bottom of the drying cylinder 21 is provided with an air blowing component B27, and a partition component 28 for screening agglomerated anthocyanins is provided. The bottom of the drying cylinder 21 is also provided with a powder grinding component 29 for crushing agglomerated anthocyanins. When the drying eluent is used to extract anthocyanins, the air is heated by the heater 4 and then passed into the drying cylinder 21 through the air inlet pipe 41. The eluent in the storage cylinder 3 is then passed to the drying cylinder 21 through the feed pipe 31 by the liquid pump. At the same time, the motor A221 is turned on. The motor A221 drives the rotating shaft A222 and the bevel gear A223 to rotate, and drives the rotating joint 224, the reciprocating threaded rod 216 and the atomizing spray disc 7 to rotate through the bevel gear B225. The liquid is atomized and sprayed out through the atomizing spray disc 7, and the hot air is used to complete the drying work. During the rotation process of the reciprocating threaded rod 216 In the process, the lifting component 23 is lifted up and down under the limiting action of the reciprocating threaded rod 216 and the side groove 215, driving the connecting vertical rod 25 and the connecting support rod 251 to lift up and down, and four groups of scraping components 24 are used to complete the wall scraping work inside. The scraping distance of each group of scraping components 24 is the lifting height of the lifting component 23, so as to prevent the anthocyanins from agglomerating due to excessive wall scraping distance at one time. During the lifting and lowering process of the lifting component 23, the blowing component B27 is powered, and the blowing component B27 guides the compressed air to the scraping component 24, and further disperses the scraped anthocyanin particles while scraping the wall, so as to enhance the wall scraping effect and further prevent the anthocyanin from agglomerating. The dried anthocyanins are filtered by the partition component 28 and crushed by the grinding component 29, so as to further improve the product quality.

[0022] The present invention will be further described below in conjunction with the embodiments.

[0023] See also Figure 1-Figure 13 The lifting component 23 includes a lifting frame 231 slidably connected to the outside of the sleeve 213, and a protrusion 2314 is fixedly connected to the inner wall of the lifting frame 231. The protrusion 2314 is slidably connected to the inside of the side groove 215 and is slidably connected to the inside of the reciprocating threaded rod 216. A transverse groove is provided inside the lifting frame 231, and two groups of transverse grooves are provided. The two groups of transverse grooves are symmetrically arranged. A slider 232 is slidably connected inside the transverse groove. An inner groove 2311 is provided on the inner wall of the transverse groove. Both sides of the slider 232 are fixedly connected to a limit block 234, and the limit block 234 is slidably connected to the inside of the inner groove 2311. A spring A236 is fixedly connected to one side of the limit block 234, and one end of the spring A236 is fixedly connected to the inner wall of the inner groove 2311. A transverse plate 233 is movably connected to one side of the slider 232, and an inclined block A23 is fixedly connected to one end of the transverse plate 233. 31. An inclined groove 2312 is arranged on the inner wall of the transverse groove. One side of the inclined block A2331 is fitted with the inclined groove 2312. Compression grooves are arranged on both sides of the inclined block A2331. A spring B2333 is fixedly connected to the inner wall of the compression groove. A positioning block 2332 is fixedly connected to one end of the spring B2333. The positioning block 2332 is slidably connected to the inside of the compression groove. When the reciprocating threaded rod 216 rotates, the lifting frame 231 is driven to reciprocate up and down by the limiting effect of the side groove 215 and the rotation transmission effect of the reciprocating threaded rod 216. A movable groove is arranged on the inner wall of the inclined groove 2312. The movable groove is matched with the positioning block 2332. A top block 237 is slidably connected to the inside of the movable groove. A limiting disk 2372 is fixedly connected to the outer side of the top block 237. An inclined block B2371 is fixedly connected to the upper surface of the top block 237. When the reciprocating threaded rod 216 rotates, the protrusion 2314 is limited by the side groove 215 and the reciprocating threaded rod 216 rotates and drives the lifting frame 231 to move back and forth up and down. During the downward movement, the positioning block 2332 is inserted into the movable groove, and the bottom end of the top block 237 is below the lifting frame 231. The spring A236 is in a stretched state. When the lifting frame 231 moves downward to the surface of the atomizing spray disc 7, the atomizing spray disc 7 is used to squeeze the top block 237 into the movable groove, and the inclined block B2371 is used to squeeze the positioning block 2332 into the compression groove. Under the action of the reset force of the spring A236, the limit block 234 and the slider 232 are driven to move in the direction of the inclined groove 2312, and the cross plate 233 is tilted and moves upward along the inclined groove 2312, thereby achieving the effect that when scraping to the bottom during the wall scraping process, the scraping component 24 is out of contact with the inner wall of the drying cylinder 21.

[0024] An L-shaped pressure plate 214 is fixedly connected to the outside of the sleeve 213, and an upper baffle 2313 is fixedly connected to the upper surface of the lifting frame 231. The L-shaped pressure plate 214 and the upper baffle 2313 are arranged correspondingly. When the lifting frame 231 moves upward, the upper baffle 2313 contacts the bottom surface of the L-shaped pressure plate 214, and at the same time, the lower end of the L-shaped pressure plate 214 is used to squeeze the cross plate 233, so that the inclined block A2331 slides down along the inclined groove 2312 until the positioning block 2332 corresponds to the movable groove and is inserted into the positioning block 2332 under the action of the spring B2333. At the same time, the slider 232 and the limit block 234 are reset synchronously, so that the scraper component 24 fits the inner wall of the drying cylinder 21 again.

[0025] The scraping component 24 includes a mounting arc plate 241 fixedly connected to one end of the connecting support rod 251, a silicone pad 242 is fixedly connected to the outer side of the mounting arc plate 241, the mounting arc plate 241 is a hollow structure, and both the mounting arc plate 241 and the silicone pad 242 are semicircular arc structures. The mounting arc plate 241 and the silicone pad 242 are used to scrape the inner wall of the drying cylinder 21, and the hollow structure of the mounting arc plate 241 leaves an airway for subsequent inflation.

[0026] The air-inflating component B27 includes a side plate 274 fixedly connected to the outside of the lifting frame 231. The side plates 274 are provided in two groups, and the two groups of side plates 274 are symmetrically arranged. The upper surface of the side plate 274 is fixedly connected to the gas pipe B272, and the gas storage pipe B271 is sleeved on the outside of the gas pipe B272. The upper end of the gas pipe B272 is fixedly connected to a sealing plate B275, and a one-way pressure valve D276 is arranged inside the sealing plate B275. The upper end of the gas storage pipe B271 is fixedly connected to a filter A273, and a one-way pressure valve C2711 is arranged at the connection between the gas storage pipe B271 and the filter A273. The side plate 274 and the lifting frame 231 are both hollow structures, and the outer side of the slider 232 is fixedly connected to an air guide hose 235 The air guide hose 235 is connected to the inside of the lifting frame 231, and the connecting vertical rod 25 and the connecting support rod 251 are both hollow structures. The bottom surface of the arc plate 241 is fixedly connected with a nozzle 243. When the lifting frame 231 moves upward, it drives the side plate 274, the air pipe B272 and the sealing plate B275 to move upward, squeezing the air inside the air storage pipe B271. The internal air flows downward through the one-way pressure valve D276, and is transmitted through the side plate 274, the lifting frame 231, the connecting vertical rod 25, the connecting support rod 251, the hollow structure of the arc plate 241 and the air guide hose 235, and is finally ejected from the nozzle 243, so as to realize downward jetting during the scraping and rising process, and blow away the anthocyanins that may agglomerate.

[0027] The partition component 28 includes an annular plate 281 fixedly connected to the inner wall of the drying cylinder 21, a vibration groove is provided on the inner wall of the annular plate 281, an annular filter screen 282 is arranged inside the vibration groove, and a spring C283 is fixedly connected between the annular filter screen 282 and the inner wall of the vibration groove. The dried anthocyanins fall on the surface of the annular filter screen 282 for screening, leaving behind anthocyanin clusters with larger particles. The spring C283 and the vibration groove leave space for subsequent vibration.

[0028] The grinding component 29 includes an inner box 291 arranged at the bottom of the drying cylinder 21, a support plate 292 is fixedly connected between the inner box 291 and the inner wall of the drying cylinder 21, a motor B is arranged inside the inner box 291, a rotating shaft B is fixedly connected to the output end of the motor B, a conical disk 293 is fixedly connected to one end of the rotating shaft B, the conical disk 293 is arranged inside the annular filter 282, a rolling roller 294 is rotatably connected to the outer side of the conical disk 293, and the rolling roller 294 is in contact with the surface of the annular filter 282. During the drying process, the motor B is turned on, and the motor B drives the rotating shaft B and the conical disk 293 to rotate, and the anthocyanin particles on the surface of the annular filter 282 are rolled by the rotation of the rolling roller 294.

[0029] A magnetic block 284 is arranged inside the annular filter 282. There are two groups of magnetic blocks 284 in total. The two groups of magnetic blocks 284 are symmetrically arranged. The rolling roller 294 is magnetic. The rolling roller 294 and the magnetic block 284 repel each other magnetically. During the rotation of the conical disk 293, the magnetic repulsion between the rolling roller 294 and the magnetic block 284 is utilized, and the annular filter 282 vibrates up and down in the vibration groove with the cooperation of the spring C283, thereby further enhancing the screening effect.

[0030] The drying cylinder 21 is provided with an air blowing component A26 for supplying gas to the two groups of scraping components 24 arranged below. The air blowing component A26 includes an air delivery pipe A261 fixedly connected to the bottom surface of the mounting arc plate 241, and an air storage pipe A265 is sleeved on the outside of the air delivery pipe A261. A sealing plate A263 is fixedly connected to the bottom surface of the air delivery pipe A261, and a one-way pressure valve B264 is arranged inside the sealing plate A263. A breathing valve 266 is arranged inside the air storage pipe A265. A partition is arranged inside the connecting vertical rod 25, and the partition is arranged on the two groups of connecting support rods 25 symmetrically above and below. 1, when the lowest set of arc plates 241 moves upward, it drives the gas pipe A261 and the sealing plate A263 to move upward, squeezing the air inside the gas storage pipe A265 upward and flowing it into the gas pipe A261 through the one-way pressure valve A262 for air replenishment; when the arc plates 241 move downward and the sealing plate A263 moves downward, the air inside the gas storage pipe A265 enters the top of the gas storage pipe A265 through the one-way pressure valve B264 to replenish gas; the breathing valve 266 is used to balance the air pressure, and the partition is used to separate the interior of the connecting vertical rod 25 from the middle to ensure the air pressure of the inflation.

[0031] The present invention provides another technical solution: providing a method for preparing anthocyanidins, comprising the following steps: S1. Place the plant raw material in clean water and stir gently to remove dust and impurities attached to the surface, then drain the water naturally to remove excess water, use a citric acid aqueous solution with a pH value of 3-5 as an extraction solvent, and fully mix the treated plant raw material with the extraction solvent at a solid-liquid ratio of 1:5, and maintain the temperature range of 30-60° C. for 3 hours. Stir continuously during the extraction to ensure that the raw material is fully in contact with the solvent to promote the dissolution of anthocyanins; S2. After the extraction is completed, the extract is separated from the residue by filtering with filter paper to obtain a preliminary extract, and the extract is concentrated by vacuum distillation. During the vacuum distillation process, the distillation temperature is controlled at 40-50° C. to obtain a concentrated crude extract, and the concentrated crude extract is vacuum dried at a temperature of 30-40° C. to obtain a dry crude extract powder; S3, dissolving the crude extract in a solvent and passing it through a chromatography column filled with an ion exchange resin adsorbent, anthocyanins will be adsorbed by the adsorbent and retained on the chromatography column, while other impurities will flow out with the solvent, and then the anthocyanins adsorbed on the chromatography column will be eluted by adjusting the pH value of the elution solvent, and the eluate containing high-purity anthocyanins will be collected; S4. Use hot air between 120-150°C to circulate inside the spray dryer for preheating. The preheating time is controlled between 20-30 minutes. Use a 0.45-1μm filter to filter the eluent containing anthocyanins, pass it into the spray dryer and spray it out through an atomizing nozzle. Set the inlet air temperature between 150-200°C and the outlet air temperature between 80-110°C. The progress of the drying process and the degree of dryness of the product can be monitored in real time. The atomized eluent is sprayed into the drying chamber and fully contacts with the hot air. Solid components such as anthocyanins gradually form dry powder particles. The hanging structure is used to scrape off the particles attached to the inner wall. Finally, the air flow enters the cyclone separator. The dried anthocyanin powder particles fall into the collection container at the bottom of the drying chamber to complete the preparation work.

[0032] Specifically, when the anthocyanin is extracted by the drying eluent, the air is heated by the heater 4 and then passed into the drying cylinder 21 through the air inlet pipe 41, and then the eluent in the storage cylinder 3 is passed into the drying cylinder 21 through the feed pipe 31 by the liquid pump, and at the same time, the motor A221 is turned on, and the motor A221 drives the rotating shaft A222 and the bevel gear A223 to rotate, and drives the rotating joint 224, the reciprocating threaded rod 216 and the atomizing spray disc 7 to rotate through the bevel gear B225, and the liquid is atomized and sprayed out through the atomizing spray disc 7, and the drying work is completed with the hot air. During the rotation of the reciprocating threaded rod 216, the protrusion 2314 drives the lifting frame 231 to move back and forth up and down under the action of the side groove 215 limitation and the rotation transmission of the reciprocating threaded rod 216. During the downward movement, the positioning block 2332 is inserted into the movable groove, and the bottom end of the top block 237 is below the lifting frame 231. The spring A236 is in a stretched state, and when the lifting frame 231 moves downward to the surface of the atomizing spray disc 7 When scraping, the top block 237 is squeezed into the movable groove by the atomizing spray disc 7, and the positioning block 2332 is squeezed into the compression groove by the inclined block B2371. Under the action of the restoring force of the spring A236, the limit block 234 and the slider 232 are driven to move in the direction of the inclined groove 2312, and the cross plate 233 is tilted and moves upward along the inclined groove 2312, so that when scraping to the bottom, the silicone pad 242 is out of contact with the inner wall of the drying cylinder 21, and the lifting frame 231 moves upward. When moving, the upper baffle plate 2313 contacts the bottom surface of the L-shaped pressing plate 214, and at the same time, the lower end of the L-shaped pressing plate 214 is used to squeeze the horizontal plate 233, so that the inclined block A2331 slides down along the inclined groove 2312 until the positioning block 2332 corresponds to the movable groove and the positioning block 2332 is driven to be inserted under the action of the spring B2333. At the same time, the slider 232 and the limit block 234 are reset synchronously, so that the silicone pad 242 is again attached to the inner wall of the drying cylinder 21, and the above process is repeated to realize the wall scraping work; In addition, when the lifting frame 231 moves upward, it drives the side plate 274, the air pipe B272 and the sealing plate B275 to move upward, squeezing the air inside the air storage pipe B271. The air flows downward through the one-way pressure valve D276, and is transmitted through the side plate 274, the lifting frame 231, the connecting vertical rod 25, the connecting support rod 251, the hollow structure of the arc plate 241 and the air guide hose 235, and is finally ejected from the nozzle 243, so that the air is ejected downward during the upward process of the scraping wall, and the anthocyanins that may be agglomerated are blown away, and the dried anthocyanins fall on the surface of the annular filter 282 and enter Screening is performed to leave behind larger anthocyanin clusters. During the drying process, motor B is turned on, which drives shaft B and conical disk 293 to rotate, and the particles are thrown out to the surroundings by centrifugal force. The rolling roller 294 is rotated to roll the anthocyanin particles on the surface of the annular filter screen 282 to press them into smaller particles that do not agglomerate. At the same time, the rolling roller 294 and the magnetic block 284 repel each other magnetically, and the annular filter screen 282 vibrates up and down in the vibration groove with the cooperation of spring C283, thereby further enhancing the screening effect, and finally achieving the purpose of preventing anthocyanin particles from agglomerating during wall scraping and discharging.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eluent spray dryer for anthocyanin extraction, comprising a base frame (1), a material storage barrel (3) and a heater (4) being arranged on the upper surface of the base frame (1), a liquid pump being arranged inside the material storage barrel (3), a fan being arranged inside the heater (4), and a cyclone separator (5) for recovering hot air being arranged below the base frame (1), characterized in that: A drying mechanism (2) for drying and extracting anthocyanins is fixedly connected inside the base frame (1); a feed pipe (31) is provided between the material storage cylinder (3) and the drying mechanism (2); an air intake pipe (41) is fixedly connected between the heater (4) and the drying mechanism (2); a cyclone separator (5) is connected to one side of the drying mechanism (2); and a collecting tank (6) for collecting anthocyanins is provided on the bottom surface of the drying mechanism (2); The drying mechanism (2) comprises a drying cylinder (21) arranged inside the base frame (1); a fixing block (211) is fixedly connected between the drying cylinder (21) and the inner wall of the base frame (1); a discharge pipe (212) is fixedly connected to the bottom end of the drying cylinder (21); a collecting tank (6) is fixedly connected to the bottom end of the discharge pipe (212); a top box (22) is fixedly connected to the upper surface of the drying cylinder (21); a motor A (221) is fixedly connected to the inner wall of the top box (22); and a rotating shaft (221) is fixedly connected to the output end of the motor A (221). A shaft A (222), one end of the rotating shaft A (222) is fixedly connected to a bevel gear A (223), one end of the feed pipe (31) is rotatably connected to a rotary joint (224), the outer side of the rotary joint (224) is fixedly connected to a bevel gear B (225), the bottom surface of the rotary joint (224) is fixedly connected to a reciprocating threaded rod (216), the reciprocating threaded rod (216) is a hollow structure, the bottom surface of the reciprocating threaded rod (216) is fixedly connected to an atomizing spray disc (7), and the inner wall of the drying cylinder (21) is fixedly connected to a sleeve (213), the sleeve (213) is sleeved on the outside of the reciprocating threaded rod (216), a side groove (215) is provided on the outside of the sleeve (213), a lifting component (23) for controlling lifting is slidably connected to the outside of the sleeve (213), a connecting vertical rod (25) is fixedly connected to the bottom surface of the lifting component (23), a connecting support rod (251) is fixedly connected to one side of the connecting vertical rod (25), and a connecting support rod (251) is fixedly connected to one end of the connecting support rod (251) for scraping anthocyanin particles attached to the inner wall of the drying cylinder (21). The scraping component (24) is provided in four groups, and the four groups of the connecting rods (251) and the scraping component (24) are arranged at equal distances. The upper surface of the lifting component (23) is fixedly connected with an air blowing component B (27) for blowing air to disperse the anthocyanins. The bottom of the drying cylinder (21) is provided with a partition component (28) for screening the agglomerated anthocyanins. The bottom of the drying cylinder (21) is also provided with a powder grinding component (29) for crushing the agglomerated anthocyanins.

2. The eluent spray dryer for anthocyanidin extraction according to claim 1, characterized in that: The lifting component (23) comprises a lifting frame (231) slidably connected to the outside of the sleeve (213); a protrusion (2314) is fixedly connected to the inner wall of the lifting frame (231); the protrusion (2314) is slidably connected to the inside of the side groove (215) and slidably connected to the inside of the reciprocating threaded rod (216); a transverse groove is provided inside the lifting frame (231); two groups of transverse grooves are provided, the two groups of transverse grooves are symmetrically arranged, and a slider (232) is slidably connected inside the transverse groove. The inner wall of the transverse groove is provided with an inner groove (2311), both sides of the slider (232) are fixedly connected to limit blocks (234), the limit blocks (234) are slidably connected to the inner wall of the inner groove (2311), one side of the limit block (234) is fixedly connected to a spring A (236), one end of the spring A (236) is fixedly connected to the inner wall of the inner groove (2311), one side of the slider (232) is movably connected to a transverse plate (233), one end of the transverse plate (233) is fixedly connected to an inclined block A (2 331), an inclined groove (2312) is provided on the inner wall of the transverse groove, one side of the inclined block A (2331) is in contact with the inclined groove (2312), compression grooves are provided on both sides of the inclined block A (2331), a spring B (2333) is fixedly connected to the inner wall of the compression groove, one end of the spring B (2333) is fixedly connected to a positioning block (2332), the positioning block (2332) is slidably connected to the inside of the compression groove, and when the lifting frame (231) rotates on the reciprocating threaded rod (216), the protrusion ( 2314) drives the lifting frame (231) to move back and forth up and down under the limiting effect of the side groove (215) and the rotation transmission effect of the reciprocating threaded rod (216), and a movable groove is opened on the inner wall of the inclined groove (2312), and the movable groove is adapted to the positioning block (2332). A top block (237) is slidably connected inside the movable groove, and a limiting disk (2372) is fixedly connected to the outer side of the top block (237), and an inclined block B (2371) is fixedly connected to the upper surface of the top block (237).

3. The eluent spray dryer for anthocyanidin extraction according to claim 2, characterized in that: An L-shaped pressing plate (214) is fixedly connected to the outside of the sleeve (213), an upper baffle (2313) is fixedly connected to the upper surface of the lifting frame (231), and the L-shaped pressing plate (214) and the upper baffle (2313) are arranged correspondingly.

4. The eluent spray dryer for anthocyanidin extraction according to claim 3, characterized in that: The scraper component (24) comprises a mounting arc plate (241) fixedly connected to one end of a connecting support rod (251), a silicone pad (242) fixedly connected to the outer side of the mounting arc plate (241), the mounting arc plate (241) being a hollow structure, and both the mounting arc plate (241) and the silicone pad (242) being semicircular arc structures.

5. The spray dryer for eluent in anthocyanidin extraction according to claim 1, characterized in that: The air-inflating component B (27) comprises a side plate (274) fixedly connected to the outside of the lifting frame (231), and the side plates (274) are provided in two groups, and the two groups of side plates (274) are symmetrically arranged. The upper surface of the side plate (274) is fixedly connected to the air supply pipe B (272), the outer side of the air supply pipe B (272) is sleeved with the air storage pipe B (271), the upper end of the air supply pipe B (272) is fixedly connected to the sealing plate B (275), the sealing plate B (275) is provided with a one-way pressure valve D (276) inside, and the air storage pipe B (271) is fixedly connected to the upper end of the air supply pipe B (272). A filter A (273) is fixedly connected to the upper end, a one-way pressure valve C (2711) is provided at the connection between the gas storage pipe B (271) and the filter A (273), the inside of the side plate (274) and the lifting frame (231) are both hollow structures, the outside of the slider (232) is fixedly connected to an air guide hose (235), the air guide hose (235) is communicated with the inside of the lifting frame (231), the connecting vertical rod (25) and the connecting support rod (251) are both hollow structures, and the bottom surface of the mounting arc plate (241) is fixedly connected to a nozzle (243).

6. The spray dryer for eluent in anthocyanidin extraction according to claim 1, characterized in that: The partition component (28) comprises an annular plate (281) fixedly connected to the inner wall of the drying cylinder (21); a vibration groove is provided on the inner wall of the annular plate (281); an annular filter screen (282) is provided inside the vibration groove; and a spring C (283) is fixedly connected between the annular filter screen (282) and the inner wall of the vibration groove.

7. The spray dryer for eluent in anthocyanidin extraction according to claim 6, characterized in that: The powder grinding component (29) comprises an inner box (291) arranged at the bottom of the drying cylinder (21); a support plate (292) is fixedly connected between the inner box (291) and the inner wall of the drying cylinder (21); a motor B is arranged inside the inner box (291); a rotating shaft B is fixedly connected to the output end of the motor B; a conical disk (293) is fixedly connected to one end of the rotating shaft B; the conical disk (293) is arranged inside the annular filter (282); a grinding roller (294) is rotatably connected to the outer side of the conical disk (293); the grinding roller (294) is in contact with the surface of the annular filter (282).

8. The spray dryer for eluent in anthocyanin extraction according to claim 1, characterized in that: A magnetic block (284) is arranged inside the annular filter screen (282), and two groups of the magnetic blocks (284) are arranged in total. The two groups of the magnetic blocks (284) are symmetrically arranged, and the rolling roller (294) is magnetic, and the rolling roller (294) and the magnetic blocks (284) repel each other magnetically.

9. The spray dryer for eluent in anthocyanidin extraction according to claim 4, characterized in that: The drying cylinder (21) is provided with an air blowing component A (26) for supplying air to two groups of scraping components (24) arranged below. The air blowing component A (26) comprises an air supply pipe A (261) fixedly connected to the bottom surface of the mounting arc plate (241). An air storage pipe A (265) is sleeved on the outside of the air supply pipe A (261). A sealing plate A (263) is fixedly connected to the bottom surface of the air supply pipe A (261). A one-way pressure valve B (264) is arranged inside the sealing plate A (263). A breathing valve (266) is arranged inside the air storage pipe A (265). A partition is arranged inside the connecting vertical rod (25). The partition is arranged between the two groups of connecting support rods (251) that are symmetrical in upper and lower directions.

10. A method for preparing anthocyanidins, characterized in that: The method of using the spray dryer for eluent in anthocyanin extraction according to any one of claims 1 to 9 comprises the following steps: S1. Place the plant raw material in clean water and stir gently to remove dust and impurities attached to the surface, then drain the water naturally to remove excess water, use a citric acid aqueous solution with a pH value of 3-5 as an extraction solvent, and fully mix the treated plant raw material with the extraction solvent at a solid-liquid ratio of 1:5, and maintain the temperature range of 30-60° C. for 3 hours. Stir continuously during the extraction to ensure that the raw material is fully in contact with the solvent to promote the dissolution of anthocyanins; S2. After the extraction is completed, the extract is separated from the residue by filtering with filter paper to obtain a preliminary extract, and the extract is concentrated by vacuum distillation. During the vacuum distillation process, the distillation temperature is controlled at 40-50° C. to obtain a concentrated crude extract, and the concentrated crude extract is vacuum dried at a temperature of 30-40° C. to obtain a dry crude extract powder; S3, dissolving the crude extract in a solvent and passing it through a chromatography column filled with an ion exchange resin adsorbent, anthocyanins will be adsorbed by the adsorbent and retained on the chromatography column, while other impurities will flow out with the solvent, and then the anthocyanins adsorbed on the chromatography column will be eluted by adjusting the pH value of the elution solvent, and the eluate containing high-purity anthocyanins will be collected; S4. Use hot air between 120-150°C to circulate inside the spray dryer for preheating. The preheating time is controlled between 20-30 minutes. Use a 0.45-1μm filter to filter the eluent containing anthocyanins, pass it into the spray dryer and spray it out through an atomizing nozzle. Set the inlet air temperature between 150-200°C and the outlet air temperature between 80-110°C. The progress of the drying process and the degree of dryness of the product can be monitored in real time. The atomized eluent is sprayed into the drying chamber and fully contacts with the hot air. Solid components such as anthocyanins gradually form dry powder particles. The hanging structure is used to scrape off the particles attached to the inner wall. Finally, the air flow enters the cyclone separator. The dried anthocyanin powder particles fall into the collection container at the bottom of the drying chamber to complete the preparation work.

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