Preparation method and drying device of food essence microcapsules

Abstract

The present invention discloses a food essence microcapsule preparation method and a drying device, and relates to the technical field of food essence microcapsule preparation, and the food essence microcapsule preparation method comprises the following steps: step 1: 5 g of beta-cyclodextrin is added into water, heated, dissolved and uniformly mixed to obtain a water phase, 1 g of essence is heated and stirred at 55 DEG C to obtain an oil phase, the water phase is sheared at a high speed of 10000 r / min, the oil phase is added at the same time, and a mixture is obtained; uniformly shearing to obtain essence emulsion; according to the preparation method and the drying device of the food flavor microcapsules, experiments show that the beef flavor is successfully embedded in the microcapsules, so that the fragrance intensity of the beef flavor under the normal condition is reduced, and when the structure of the microcapsules is damaged by hot water, the fragrance intensity of the beef flavor under the normal condition is reduced. The flavor of the embedded essence can be quickly released, and flavor protection and controlled release of the beef essence are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of food flavor microcapsule preparation, in particular to a preparation method and drying device of food flavor microcapsules. BACKGROUND

[0002] Beef flavor is one of the most important categories of meat flavors due to its unique flavor characteristics and wide market acceptance. It has been widely used in meat products, instant foods, seasonings and other fields, which can effectively enhance the meaty flavor of food and improve the taste. The stability of volatile flavor components is the primary challenge faced by beef flavor. Beef flavor is easily affected by temperature, oxygen, light and other factors during processing and storage, leading to oxidation, decomposition or volatilization, resulting in weakened aroma intensity and changed flavor profile, which seriously affects the flavor quality of the final product. Secondly, traditional flavors often show "explosive" release after addition, which cannot achieve the persistence and balance of flavor, leading to the uncoordinated phenomenon of excessive aroma at the initial stage and insufficient flavor at the later stage, which is difficult to meet the precise requirements of modern food processing for flavor delivery system. In addition, the lack of shelf stability is also a bottleneck problem restricting the application of beef flavor.

[0003] In view of the above technical problems, microcapsule technology as an efficient flavor protection and controlled release means provides an innovative solution for the performance improvement of beef flavor. Microencapsulation is a technology that uses natural or synthetic polymer materials to coat solid, liquid or gas substances into small particles, usually with a diameter of 1-1000 μm. This technology can effectively solve the stability and controlled release problems of beef flavor through physical barrier effect. β-cyclodextrin is a cyclic oligosaccharide formed by 7 pyranose units connected by α-1, 4 glycosidic bonds, forming a truncated cone-shaped stereostructure with internal hydrophobic and external hydrophilic characteristics. This unique cavity structure (inner diameter about 0.78 nm) can form stable inclusion compounds with various organic molecules through intermolecular forces, which is suitable for embedding volatile flavor substances in beef flavor.

[0004] Although β-cyclodextrin microcapsule technology has been applied in the field of flavors, there are still obvious deficiencies in the special microcapsule system for beef flavor. In addition, traditional preparation processes such as saturated aqueous solution method, grinding method, etc. have low embedding efficiency, high energy consumption and complex process, which are difficult to meet the needs of industrial production. At the same time, the existing technology lacks differentiated embedding strategy for different properties of flavor components in beef flavor, which is difficult to achieve precise protection and release of overall flavor profile. Therefore, a preparation method and drying device of food flavor microcapsules are proposed. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a preparation method and drying device of food flavor microcapsules, which solves the problems raised in the background art.

[0006] To achieve the above object, the present application is implemented by the following technical solutions: a preparation method of food essence microcapsules, comprising the following steps: Step one: 5g of β-cyclodextrin is added to water, heated and dissolved, and mixed uniformly to obtain an aqueous phase; 1g of essence is heated and stirred at 55°C to obtain an oil phase; the aqueous phase is subjected to high-speed shearing at 10000 r / min, and the oil phase is added at the same time; and the essence emulsion is obtained after uniform shearing. Step two: the obtained essence emulsion is subjected to spray drying to evaporate water to obtain essence microcapsules.

[0007] Optionally, the spray dryer parameters are as follows: the inlet temperature is set to 160°C; the outlet temperature is set to 90°C; and the feeding rate is set to 5.0 mL / min.

[0008] Optionally, the determination of the microcapsule embedding rate is as follows: 0.1 g of microcapsules is placed in a triangular flask, 20 mL of dichloromethane is added, and then shaken for 1 min; the filtrate is filtered, and then dehydrated by adding an appropriate amount of anhydrous sodium sulfate; the filtrate is filtered again into a round-bottom flask, the original weight of the bottle is M0, and the weight after filtration is M1. 0.1 g of microcapsules is placed in a triangular flask, 20 mL of dichloromethane is added, and then shaken for 30 min at 30°C; the filtrate is filtered, and then dehydrated by adding an appropriate amount of anhydrous sodium sulfate; the filtrate is filtered again into a round-bottom flask, the original weight of the bottle is M2, and the weight after filtration is M3.

[0009] ) × 100% (1) Optionally, in step one, 5g of β-cyclodextrin is added to water, heated and dissolved, and mixed uniformly to obtain an aqueous phase; 1g of essence is heated and stirred at 55°C to obtain an oil phase; the aqueous phase is subjected to high-speed shearing at 10000 r / min, and the oil phase is added at the same time; and the essence emulsion is obtained after uniform shearing.

[0010] Optionally, in step one, 5g of β-cyclodextrin is added to water, heated and dissolved, and mixed uniformly to obtain an aqueous phase; 1g of essence is heated and stirred at 55°C to obtain an oil phase; the aqueous phase is subjected to high-speed shearing at 10000 r / min, and the oil phase is added at the same time; and the essence emulsion is obtained after uniform shearing.

[0011] The utility model provides a kind of preparation of food essence microcapsule with drying device, including bottom plate, the top of the bottom plate is fixedly connected with spray dryer, the top of the spray dryer is fixedly connected with hot gas pipe, the top of the spray dryer and the side of hot gas pipe are fixedly connected with raw material pipe, the top of the bottom plate is fixedly connected with heat exchange box, heat exchange cavity is opened in the inside of the heat exchange box, the inside of the heat exchange cavity is fixedly connected with heat exchange pipe, the both ends of the heat exchange pipe respectively pass through fixed box and extend to the outside of fixed box, the one end of the heat exchange pipe is fixedly connected with air inlet pipe, the other end of the heat exchange pipe is fixedly connected with air outlet pipe, the top of the heat exchange box is equipped with guide groove, bottom groove is opened in the inside of the heat exchange box and below guide groove, second sealing gasket is embedded in the inside of guide groove, the bottom of the second sealing gasket is fixedly connected with guide block, the bottom end of the guide block passes through bottom groove and extends to the inside of heat exchange cavity, the bottom of the guide block is rotatably connected with rotating block, the bottom of the rotating block is fixedly connected with scraping sleeve, the scraping sleeve is located the outside of heat exchange pipe, the top of the heat exchange box is fixedly connected with first winding box, first winding roller is rotatably connected in the inside of the first winding box, the top of the heat exchange box and the right side of first winding box are fixedly connected with second winding box, second winding roller is rotatably connected in the inside of the second winding box, the both ends of the second sealing gasket extend to the inside of first winding box and second winding box respectively, one end of the second sealing gasket is fixedly connected with the outside of first winding roller, the other end of the second sealing gasket is fixedly connected with the outside of second winding roller, the top of the first winding box is fixedly connected with first servo motor, the output of the first servo motor is fixedly connected with the top end of first winding roller, the top of the second winding box is fixedly connected with second servo motor, the output of the second servo motor is fixedly connected with the top end of second winding roller.

[0012] The top of the heat exchange box is rotatably connected with five guide rollers, the outside of the guide roller is in contact with the inflection point of the second sealing gasket, the top of the heat exchange box and the outside of the second sealing gasket are fixedly connected with pressing plate outside several guide rollers.

[0013] The top of the heat exchange pipe is equipped with rail slot, sealing groove is opened in the inside of the heat exchange pipe and below rail slot, the sealing groove is communicated with heat exchange pipe inner chamber, scraping ring is placed in the heat exchange pipe inner chamber, first sealing gasket is embedded in the inside of rail slot, the bottom of the first sealing gasket is connected with the top of scraping ring, the top of the fixed box and above air inlet pipe and above air outlet pipe are fixedly connected with winding box, winding roller is rotatably connected on one side of winding box inner chamber, clockwork is arranged on the other side of winding box inner chamber, one end of winding roller is connected with clockwork, the both ends of the first sealing gasket extend to the inside of winding box and are respectively connected with the outside of two winding rollers.

[0014] The first receiving cavity is internally rotatably connected with a first receiving roller, the other side of the heat exchange cavity in the heat exchange box is provided with a second receiving cavity, and the second receiving cavity is internally rotatably connected with a second receiving roller.

[0015] The top of the heat exchange box is fixedly connected with a piston cylinder, one end of the piston cylinder is fixedly connected with a connecting box, one side of the connecting box is fixedly connected with a driving box, one end of the first receiving roller extends to the inside of the driving box, one side of the driving box is fixedly connected with a fourth servo motor, and the output end of the fourth servo motor is fixedly connected with one end of the first receiving roller.

[0016] The inside of the connecting box is rotatably connected with a reciprocating screw rod, the outer side of the reciprocating screw rod is threadedly connected with a piston column, one end of the piston column extends to the inside of the piston cylinder and is matched with the inside of the piston cylinder, one end of the piston cylinder is fixedly connected with a connecting pipe, one side of the heat exchange box is provided with a rotary joint, one end of the connecting pipe is fixedly connected with one end of the rotary joint, the other end of the connecting pipe extends to the inside of the piston cylinder, the inside of the first receiving roller is fixedly connected with a spray pipe, one end of the spray pipe extends to the inside of the bottom pad and extends above the spray pipe, the other end of the spray pipe is fixedly connected with one end of the rotary joint, one end of the reciprocating screw rod extends to the inside of the driving box and is rotatably connected with one side of the inner cavity of the driving box, the outer sides of the first receiving roller and the reciprocating screw rod are fixedly sleeved with chain wheels which are connected through a chain belt, the other side of the piston cylinder is fixedly connected with a communicating pipe, the other side of the heat exchange box is fixedly connected with a liquid inlet pipe, the one end of the communicating pipe and the one end of the connecting pipe which are located in the inside of the piston cylinder are fixedly connected with one-way valves, one end of the communicating pipe is connected with the liquid inlet pipe, the liquid inlet pipe and one end of the raw material pipe extend to the inside of the heat exchange cavity, the air outlet end of the spray dryer is fixedly connected with one end of the air inlet pipe, one end of the air outlet pipe is fixedly connected with a suction pipe, the top of the bottom plate is fixedly connected with a cyclone dust collector, one end of the suction pipe is connected with the air inlet end of the cyclone dust collector, the top of the bottom plate and one side of the cyclone dust collector are fixedly connected with a filter, the top of the bottom plate and one side of the filter are fixedly connected with an air extractor, one end of the air extractor is connected with the air inlet end of the filter, and the air inlet end of the filter is connected with the air outlet end of the cyclone dust collector through a pipeline.

[0017] The application provides a food essence microcapsule preparation method and drying device, which has the following beneficial effects: 1. The food essence microcapsule preparation method and drying device, through experiments, the beef essence is successfully embedded in the microcapsule, thereby reducing the aroma intensity of the beef essence under normal circumstances, and when hot water destroys the microcapsule structure, the embedded essence odor can be quickly released, realizing the flavor protection and controlled release of the beef essence.

[0018] 2. The food essence microcapsule preparation method and drying device can heat the raw materials that are not input into the inside of the spray dryer by using the temperature in the exhaust gas discharged outside the spray dryer, thereby reducing energy consumption when the preheated raw materials are discharged into the inside of the spray dryer for spray drying.

[0019] 3. The food essence microcapsule preparation method and drying device, through the heat exchange pipe, the scraper sleeve and the scraper ring, the guide block, the rotating block and the scraper sleeve are driven by the second sealing gasket, and the first sealing gasket and the scraper ring move along the outer side and the inner wall of the heat exchange pipe, the original liquid adhesion on the outer side of the heat exchange pipe is scraped off, and the raw material adhesion carried by the gas adhered to the inner wall of the heat exchange pipe is scraped off, preventing the heat exchange pipe from being blocked inside, and avoiding the attachment of the original liquid adhesion on the outer side of the heat exchange pipe, causing the preheating of the original liquid in the heat exchange cavity through the heat exchange pipe. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a different wall material beef essence microcapsule embedding rate graph of the application; Figure 2 It is a β-cyclodextrin beef essence microcapsule embedding rate graph under different wall-to-core ratios of the application; Figure 3 It is a β-cyclodextrin beef essence microcapsule embedding rate graph under different sample inlet temperatures of the application; Figure 4 It is a β-cyclodextrin beef essence microcapsule embedding rate graph under different sample outlet temperatures of the application; Figure 5 It is a β-cyclodextrin beef essence microcapsule embedding rate graph under different feeding rates of the application; Figure 6 It is a SEM graph of β-cyclodextrin (A: 2 μm; B: 20 μm) and β-cyclodextrin beef essence microcapsule (C: 2 μm; D: 20 μm) of the application; Figure 7 It is an infrared spectrum graph of β-cyclodextrin, beef essence and β-cyclodextrin beef essence microcapsule of the application; Figure 8 It is a schematic diagram of the internal structure of the drying device of the application; Figure 9 It is a schematic diagram of the internal structure of the heat exchange box of the application; Figure 10 It is the inside structure schematic view of the heat exchange pipe of the present application; Figure 11 It is the inside structure schematic view of the heat exchange box of the present application; Figure 12 It is the inside structure schematic view of the second sealing gasket position structure of the heat exchange box of the present application; Figure 13 It is the inside structure schematic view of the heat exchange box of the present application; Figure 14 It is the inside structure schematic view of the drive box of the present application; Figure 15 It is the inside structure schematic view of the first winding box, the second winding box, the connecting box, the drive box and the piston cylinder of the present application; Figure 16 It is the inside structure schematic view of the winding box of the present application.

[0021] 1, bottom plate; 2, spray dryer; 3, hot gas pipe; 4, raw material pipe; 5, heat exchange box; 6, first winding box; 7, first winding roller; 8, first servo motor; 9, second winding box; 10, second servo motor; 11, second winding roller; 12, guide groove; 13, bottom groove; 14, guide block; 15, rotating block; 16, rail groove; 17, first sealing gasket; 18, sealing groove; 19, scraping ring; 20, scraping sleeve; 21, heat exchange pipe; 22, fixed box; 23, air inlet pipe; 24, air outlet pipe; 25, winding box; 26, winding roller; 28, spring; 29, stirring shaft; 30, third servo motor; 31, heat exchange cavity; 32, first storage cavity; 33, first storage roller; 34, second storage cavity; 35, second storage roller; 36, bottom pad; 37, spray pipe; 38, rotary joint; 39, connecting pipe; 40, drive box; 41, fourth servo motor; 42, connecting box; 43, reciprocating screw rod; 44, piston cylinder; 45, piston column; 46, guide roller; 47, chain wheel; 48, pressing plate; 49, liquid inlet pipe; 50, cyclone dust collector; 51, suction pipe; 52, filter; 53, air extractor; 54, fifth servo motor; 55, second sealing gasket; 56, communication pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0023] The present application provides a technical solution: a preparation method of food essence microcapsule, comprising the following steps: Step one: 5g β-cyclodextrin was added to water and dissolved by heating at 65 ℃, and mixed uniformly to obtain an aqueous phase. 1g fragrance was heated and stirred at 55 ℃ to obtain an oil phase. The aqueous phase was sheared at a high speed (homogenizer) at 10000 r / min, and the oil phase was added at the same time. After shearing uniformly, a fragrance emulsion was obtained; Step two: the obtained fragrance emulsion was subjected to spray drying to evaporate water to obtain fragrance microcapsules. The spray dryer parameters were as follows: the inlet temperature was set to 160 ℃; the outlet temperature was set to 90 ℃; and the feeding rate was set to 5.0 mL / min.

[0024] Determination of microcapsule embedding rate: 0.1 g of microcapsules was weighed into a triangular flask, 20 mL of dichloromethane was added and shaken for 1 min, the filtrate was filtered and added with a proper amount of anhydrous sodium sulfate to remove water, and then filtered into a round-bottom flask (original weight of the bottle M0). After filtration, M1 was obtained by rotary evaporation. 0.1 g of microcapsules was weighed into a triangular flask, 20 mL of dichloromethane was added and shaken for 30 min at 30 ℃, the filtrate was filtered and added with a proper amount of anhydrous sodium sulfate to remove water, and then filtered into a round-bottom flask (original weight of the bottle M2). After filtration, M3 was obtained by rotary evaporation.

[0025] ) × 100% (1) Single-factor optimization preparation method: Under the conditions that the β-cyclodextrin dissolution temperature was 65 ℃ and the stirring time of β-cyclodextrin and fragrance was 3.0 h, the embedding rate was used as an index to control variable experiments of 5 factors, including wall material types (corn starch, β-cyclodextrin and sodium octenyl succinate starch), different wall-core ratios (3, 5, 7, 9), inlet temperature (120 ℃, 140 ℃, 160 ℃), outlet temperature (80 ℃, 90 ℃, 100 ℃) and feeding rate (4.0 mL / min, 5.0 mL / min, 6.0 mL / min).

[0026] Influence of different wall materials on embedding rate: The influence of different wall materials on the embedding rate of beef fragrance microcapsules was as follows Figure 1The wall core ratio and spray dryer parameters were the same. The best microcapsule embedding rate of beef flavor was 59.88% when β-cyclodextrin was used as the wall material. The microcapsule embedding rates of corn starch and sodium octenyl succinate starch were 41.56% and 53.30%, respectively. The reason for this difference may be that β-cyclodextrin has a special cavity structure with a hydrophobic center and a hydrophilic surface, which can encapsulate the core material (flavor) as a "guest" molecule inside it, forming a stable inclusion complex through non-covalent interactions. Corn starch has higher viscosity and a harder crystal structure than β-cyclodextrin and sodium octenyl succinate starch, making it difficult to dry and form microcapsules. Therefore, β-cyclodextrin was chosen as the wall material for subsequent condition optimization.

[0027] Effect of different wall core ratios on embedding rate: The embedding rate results when the wall core ratio was the only variable and other factors were kept constant are shown in Figure 2 From Figure 2 it can be clearly seen that as the wall core ratio increases, the embedding rate of the microcapsules first increases and then decreases. When the wall core ratio is 1:7, the embedding rate reaches an optimum of 62.50%. As the wall core ratio further increases, the embedding rate decreases. When the amount of wall material is too large and the core material is constant, the amount of core material that the wall material can encapsulate decreases, and the microcapsule structure may collapse and break during the drying process, resulting in a decrease in embedding rate. Therefore, a wall core ratio of 1:7 was chosen as the best ratio for the selection of the following spray dryer parameters.

[0028] Effect of different inlet temperatures on embedding rate: While keeping other factors constant, the inlet temperature was set to 120 ℃, 140 ℃, and 160 ℃, respectively, to study the effect of different inlet temperatures on the embedding rate of the microcapsules. The results are shown in Figure 3 From Figure 3 it can be seen that as the inlet temperature increases, the embedding rate of the microcapsules gradually increases, reaching an optimum of 78.13% at 160 ℃. This may be because at too low a temperature, the drying effect of the microcapsule emulsion in the spray dryer is poor, and as the temperature increases, the emulsion dries to form microcapsules.

[0029] Effect of different outlet temperatures on embedding rate: While keeping other factors constant, the outlet temperature was set to 80 ℃, 90 ℃, and 100 ℃, respectively, to study the effect of different inlet temperatures on the embedding rate of the microcapsules. The results are shown in Figure 4 From Figure 4It can be seen that with the increase of the temperature of the sample outlet, the embedding rate of the microcapsule presents a gradually increasing trend first and then decreasing, and reaches the best embedding rate of 78.13% at 90 ℃. This may be because the drying effect of the microcapsule emulsion in the spray dryer is poor at too low temperature. With the increase of temperature, the emulsion is dried to form microcapsules. However, when the temperature of the sample outlet is too high, the water in the microcapsule system is dispersed, the concentration of the wall material is too large, the core material is volatilized by heat, and the embedding rate of the microcapsule decreases.

[0030] Effect of different feeding rates on embedding rate Keeping other factors unchanged, the feeding rate was set to 4.0 mL / min, 5.0 mL / min and 6.0 mL / min respectively, and the effect of different feeding rates on the embedding rate of the microcapsule was studied, and the results are shown in Figure 5 Figure 5 It can be seen that with the increase of the feeding rate, the embedding rate of the microcapsule presents a gradually increasing trend first and then decreasing, and reaches the best embedding rate of 70.03% at 5.0 mL / min. When the feeding rate is further increased, the embedding rate decreases sharply, which may be because the emulsion is not completely dried when the feeding rate is too fast, the wall material does not wrap the core material, and the microcapsule is easy to stick to the pipe wall and the sample outlet, which destroys the structure of the microcapsule.

[0031] Sensory evaluation of β-cyclodextrin beef flavor microcapsules: Select 5 healthy, normal, and experienced evaluators to form a sensory evaluation team to evaluate the fragrance intensity of the samples; the evaluators should make independent judgments without discussing or interfering with each other. Dry 0.25 g of microcapsule samples in clean glassware, and the control group is an equal amount of flavor. The sensory evaluation of the fragrance intensity of each group of samples is carried out. Then 25.00 mL of 80 ℃ pure water is added to each sample, and after the flavor and microcapsule are dissolved, the sensory evaluation of the fragrance intensity of each group of aqueous solutions is carried out. The evaluation results are divided into 5 levels, and the fragrance intensity is divided into 1-5 levels (1 level, very weak fragrance; 2 level, weak fragrance; 3 level, moderate fragrance; 4 level, strong fragrance; 5 level, very strong fragrance). The results are shown in Table 1.

[0032] Table 1

[0033] From the above table, it can be seen that the microcapsules prepared by the best process screened by single factor successfully embedded the beef flavor, reduced the fragrance intensity of the beef flavor under normal circumstances, and when the hot water destroyed the structure of the microcapsule, the embedded flavor could be quickly released, realizing the flavor protection and controlled release of the beef flavor.

[0034] Morphology characterization of β-cyclodextrin beef flavor microcapsules: The microcapsules prepared under the best conditions screened above were used for subsequent characterization and performance testing.​Figure 6 SEM images of β-cyclodextrin and β-cyclodextrin microcapsules. As Figure 6 shown in Figures 6A and 6B, β-cyclodextrin presents a rough surface, uneven block structure. While β-cyclodextrin microcapsules present a wrinkled surface, uneven spherical structure, connected to each other, without rupture Figure 6 (Figures 6C and 6D). The SEM results show that beef flavor successfully enters the cavity structure of β-cyclodextrin to form microcapsules.

[0035] Spectral characterization of β-cyclodextrin beef flavor microcapsules: Figure 7 Infrared spectra of β-cyclodextrin, beef flavor and β-cyclodextrin beef flavor microcapsules. As Figure 7 shown, β-cyclodextrin has a clear absorption peak at 3414 cm -1 , which is caused by the stretching vibration of -OH. The stretching vibration absorption peak of C-H appears at 2927 cm -1 , and the asymmetric stretching vibration absorption characteristic peak of C-O appears at 1038 cm -1 . At the same time, beef flavor has an asymmetric stretching vibration characteristic peak of C-H at 2924 cm -1 , and a stretching vibration absorption peak of C=O at 1745 cm -1 . In the spectrum of β-cyclodextrin beef flavor microcapsules, the classic β-cyclodextrin -OH and C-O stretching vibration absorption peaks at 3373 cm -1 and 1037 cm -1 can be clearly observed. While the classic beef flavor C-H and C=O stretching vibration absorption peaks at 2922 cm -1 and 1751 cm -1 appear. The infrared results show that beef flavor successfully enters the cavity structure of β-cyclodextrin to form microcapsules.

[0036] From the above results, it can be concluded that the beef flavor is successfully encapsulated in the cavity structure of β-cyclodextrin to form microcapsules. Figures 8 to 16As shown, a kind of preparation of food essence microcapsule drying device, including bottom plate 1, the top of bottom plate 1 is fixedly connected with spray dryer 2, the top of spray dryer 2 is fixedly connected with hot gas pipe 3, the top of spray dryer 2 and located one side of hot gas pipe 3 is fixedly connected with raw material pipe 4, the top of bottom plate 1 is fixedly connected with heat exchange box 5, heat exchange box 5 is internally provided with heat exchange cavity 31, heat exchange cavity 31 is fixedly connected with heat exchange pipe 21 in its inside, the both ends of heat exchange pipe 21 respectively pass through fixed box 22 and extend to the outside of fixed box 22, the one end of heat exchange pipe 21 is fixedly connected with air inlet pipe 23, the other end of heat exchange pipe 21 is fixedly connected with air outlet pipe 24, the top of heat exchange box 5 is provided with guide groove 12, the bottom of heat exchange box 5 and located below guide groove 12 is provided with bottom groove 13, second sealing gasket 55 is embedded in the inside of guide groove 12, the bottom of second sealing gasket 55 is fixedly connected with guide block 14, the bottom end of guide block 14 passes through bottom groove 13 and extends to the inside of heat exchange cavity 31, the bottom of guide block 14 is rotatably connected with rotating block 15, the bottom of rotating block 15 is fixedly connected with scraping sleeve 20, scraping sleeve 20 is located at the outside of heat exchange pipe 21, the top of heat exchange box 5 is fixedly connected with first winding box 6, first winding box 6 is rotatably connected with first winding roller 7 in its inside, the top of heat exchange box 5 and located right side of first winding box 6 is fixedly connected with second winding box 9, second winding box 9 is rotatably connected with second winding roller 11 in its inside, the both ends of second sealing gasket 55 extend to the inside of first winding box 6 and second winding box 9 respectively, one end of second sealing gasket 55 is fixedly connected with the outside of first winding roller 7, the other end of second sealing gasket 55 is fixedly connected with the outside of second winding roller 11, the top of first winding box 6 is fixedly connected with first servo motor 8, the output end of first servo motor 8 is fixedly connected with the top end of first winding roller 7, the top of second winding box 9 is fixedly connected with second servo motor 10, the output end of second servo motor 10 is fixedly connected with the top end of second winding roller 11, the output end of second servo motor 10 can drive second winding roller 11 to rotate, the output end of first servo motor 8 can drive first winding roller 7 to rotate, drive second sealing gasket 55 to move.

[0037] The top of heat exchange box 5 is rotatably connected with five guide rollers 46, the outside of guide roller 46 is in contact with the inflection point of second sealing gasket 55, the top of heat exchange box 5 and located outside of several guide rollers 46 and the outside of second sealing gasket 55 is fixedly connected with pressing plate 48, second sealing gasket 55 is limited by pressing plate 48.

[0038] The top of the heat exchange pipe 21 is provided with a rail groove 16, and the inside of the heat exchange pipe 21 and below the rail groove 16 is provided with a sealing groove 18, which is communicated with the inner cavity of the heat exchange pipe 21. The inner cavity of the heat exchange pipe 21 is provided with a scraping ring 19. The first sealing gasket 17 is embedded in the rail groove 16. The bottom of the first sealing gasket 17 is connected with the top of the scraping ring 19. The top of the fixed box 22 and above the air inlet pipe 23 and the air outlet pipe 24 are fixedly connected with a winding box 25. One side of the inner cavity of the winding box 25 is rotatably connected with a winding roller 26. The other side of the inner cavity of the winding box 25 is provided with a clockwork 28. One end of the winding roller 26 is connected with the clockwork 28. Both ends of the first sealing gasket 17 extend into the winding box 25 and are respectively connected with the outer sides of the two winding rollers 26. The first sealing gasket 17 is wound or unwound by the winding roller 26.

[0039] The first receiving cavity 32 is rotatably connected with a first receiving roller 33. The second receiving cavity 34 is rotatably connected with a second receiving roller 35. The outer side of the second receiving roller 35 is wound with a bottom pad 36. One end of the bottom pad 36 penetrates through the heat exchange cavity 31 and extends into the first receiving cavity 32 and is connected with the outer side of the first receiving roller 33. One side of the heat exchange box 5 is fixedly connected with a fifth servo motor 54. The output end of the fifth servo motor 54 is fixedly connected with one end of the second receiving roller 35. Both ends of the heat exchange cavity 31 are rotatably connected with a stirring shaft 29. One side of the heat exchange box 5 and one end of the stirring shaft 29 are fixedly connected with a third servo motor 30. The output end of the third servo motor 30 is fixedly connected with one end of the stirring shaft 29. The second receiving roller 35 is driven to rotate by the output end of the fifth servo motor 54, so that the second receiving roller 35 winds the bottom pad 36. The first receiving roller 33 winds or unwinds the bottom pad 36.

[0040] The top of the heat exchange box 5 is fixedly connected with a piston cylinder 44. One end of the piston cylinder 44 is fixedly connected with a connecting box 42. One side of the connecting box 42 is fixedly connected with a driving box 40. One end of the first receiving roller 33 extends into the driving box 40. One side of the driving box 40 is fixedly connected with a fourth servo motor 41. The output end of the fourth servo motor 41 is fixedly connected with one end of the first receiving roller 33. The first receiving roller 33 is driven to rotate by the output end of the fourth servo motor 41, so that the first receiving roller 33 winds or unwinds the bottom pad 36.

[0041] The reciprocating screw rod 43 is rotatably connected inside the coupling box 42, the outer side of the reciprocating screw rod 43 is threadedly connected with a piston column 45, one end of the piston column 45 extends into the piston cylinder 44 and is matched with the inside of the piston cylinder 44, one end of the piston cylinder 44 is fixedly connected with a connecting pipe 39, a rotary joint 38 is installed on one side of the heat exchange box 5, one end of the connecting pipe 39 is fixedly connected with one end of the rotary joint 38, the other end of the connecting pipe 39 extends into the piston cylinder 44, a spray pipe 37 is fixedly connected inside the first storage roller 33, one end of the spray pipe 37 extends into the bottom pad 36 and extends above the spray pipe 37, the other end of the spray pipe 37 is fixedly connected with one end of the rotary joint 38, one end of the reciprocating screw rod 43 extends into the driving box 40 and is rotatably connected with one side of the inner cavity of the driving box 40, the outer side of the first storage roller 33 and the reciprocating screw rod 43 are both fixedly sleeved with chain wheels 47 which are connected by a chain belt, the other side of the piston cylinder 44 is fixedly connected with a communicating pipe 56, the other side of the heat exchange box 5 is fixedly connected with a liquid inlet pipe 49, the one end of the communicating pipe 56 and the one end of the connecting pipe 39 inside the piston cylinder 44 are both fixedly connected with a one-way valve, one end of the communicating pipe 56 is connected with the liquid inlet pipe 49, the liquid inlet pipe 49 and one end of the raw material pipe 4 both extend into the heat exchange cavity 31, the air outlet end of the spray dryer 2 is fixedly connected with one end of the air inlet pipe 23, one end of the air outlet pipe 24 is fixedly connected with a suction pipe 51, the top of the bottom plate 1 is fixedly connected with a cyclone dust collector 50, one end of the suction pipe 51 is connected with the air inlet end of the cyclone dust collector 50, the top of the bottom plate 1 and one side of the cyclone dust collector 50 are fixedly connected with a filter 52, the top of the bottom plate 1 and one side of the filter 52 are fixedly connected with an air extractor 53, one end of the air extractor 53 is connected with the air inlet end of the filter 52, the air inlet end of the filter 52 is connected with the air outlet end of the cyclone dust collector 50 through a pipeline, so as to collect the raw material particles carried in the waste gas after the spray drying of the spray dryer 2.

[0042] In summary, when in use, the stock solution enters into the heat exchange cavity 31 through the liquid inlet pipe 49, the gas flowing inside the heat exchange pipe 21 preheats the stock solution, then the preheated stock solution enters into the spray dryer 2 through the raw material pipe 4, the hot gas is sprayed into the spray dryer 2 through the hot gas pipe 3, so as to spray dry the stock solution, most of the raw materials fall into the collection cavity at the bottom of the spray dryer 2, part of the raw materials are discharged into the air inlet pipe 23 through the air outlet end of the spray dryer 2 along with the waste gas, so as to enter into the heat exchange pipe 21, and preheat the stock solution flowing inside the heat exchange cavity 31, The output end of the first servo motor 8 drives the first winding roller 7 to rotate, the output end of the second servo motor 10 drives the second winding roller 11 to rotate, so that the second winding roller 11 winds the second sealing gasket 55, the first winding roller 7 unwinds the second winding roller 11, so that the second sealing gasket 55 drives the guide block 14 and the rotating block 15 and the scraper sleeve 20 to move, so that the scraper sleeve 20 drives the first sealing gasket 17 and the scraper ring 19 to move, and the scraper sleeve 20 and the scraper ring 19 clean the inner wall and the outer side of the heat exchange pipe 21, when the first sealing gasket 17 moves, the winding roller 26 on the left side unwinds the first sealing gasket 17, so that the clockwork 28 on the right side drives the winding roller 26 to rotate, so that the winding roller 26 winds the first sealing gasket 17, so that the first sealing gasket 17 moves, so that the scraper ring 19 and the scraper sleeve 20 move along the inner wall and the outer side of the heat exchange pipe 21, and the original liquid adhering matter on the outer side of the heat exchange pipe 21 is scraped off, and the raw material adhering matter on the inner wall of the heat exchange pipe 21 is scraped off, the output end of the fourth servo motor 41 drives the first storage roller 33 to rotate, so that the first storage roller 33 unwinds the bottom pad 36, the output end of the fifth servo motor 54 drives the second storage roller 35 to rotate, so that the second storage roller 35 winds the bottom pad 36, so that the rotary joint 38 drives the reciprocating lead screw 43 to rotate through the chain wheel 47, so that the reciprocating lead screw 43 drives the piston column 45 to reciprocate, so that the piston cylinder 44 sucks the original liquid in the liquid inlet pipe 49 into the piston cylinder 44 through the communication pipe 56, the original liquid in the piston cylinder 44 is discharged into the rotary joint 38 through the connecting pipe 39 by the piston column 45, then enters the spray pipe 37 through the rotary joint 38, and sprays the original liquid through one end of the spray pipe 37 to disturb the original liquid in the heat exchange cavity 31, and the bottom pad 36 drives the precipitate to move towards the stirring shaft 29, the output end of the third servo motor 30 drives the stirring shaft 29 to rotate, so that the stirring shaft 29 stirs and mixes the surface precipitate of the bottom pad 36, when the bottom pad 36 is wound on the second storage roller 35, the output end of the fourth servo motor 41 drives the first storage roller 33 to reset and rotate, so that the first storage roller 33 drives the reciprocating lead screw 43 to reset and rotate through the chain wheel 47, so that the first storage roller 33 winds the bottom pad 36, and the bottom pad 36 is unwound by the second storage roller 35, at this time the bottom pad 36 drives the surface precipitate to move towards the first storage roller 33, so that the stirring shaft 29 on one side of the first storage roller 33 stirs and mixes the surface precipitate of the bottom pad 36, the raw material pipe 4 inputs the original liquid into the spray dryer 2, the heat exchanged gas enters the suction pipe 51 through the heat exchange pipe 21 and the gas outlet pipe 24, then is discharged into the cyclone dust collector 50 through the suction pipe 51 to separate the raw material and the gas, the gas is separated from the small particle raw material through the filter 52, the gas is extracted and discharged into the subsequent gas treatment and discharge equipment through the air extractor 53 for subsequent treatment, and then the gas is discharged after subsequent treatment.

[0043] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A process for the preparation of food flavour microcapsules, characterized in that: Comprising the following steps: Step one: 5g β-cyclodextrin is added to water, heated to dissolve, mixed evenly to get the water phase, 1g essence is heated to 55℃ to get the oil phase, the water phase is sheared at 10000r / min, and the oil phase is added at the same time, and the emulsion is obtained after shearing evenly; Step two: the obtained essence emulsion is dried by spray drying to evaporate water to obtain essence microcapsules; The spray dryer parameters: the inlet temperature is set to 160℃; the outlet is set to 90℃; the feeding rate is set to 5.0mL / min.

2. A process for the preparation of food flavour microcapsules according to claim 1, characterized in that: The determination of the microcapsule embedding rate: 0.1g of microcapsules is placed in a triangular flask, 20mL of dichloromethane is added, and then shaken for 1min, the filtrate is filtered, and then a proper amount of anhydrous sodium sulfate is added to remove water, and then filtered into a round-bottom flask, the original weight of the bottle is M0, the weight after filtration is M1, 0.1g of microcapsules is placed in a triangular flask, 20mL of dichloromethane is added, and then shaken for 30min at 30℃, the filtrate is filtered, and then a proper amount of anhydrous sodium sulfate is added to remove water, and then filtered into a round-bottom flask, the original weight of the bottle is M2, and the weight after filtration is M3 3. A process for the preparation of food flavour microcapsules according to claim 1, characterized in that: The step one: 5g β-cyclodextrin is added to water, heated to dissolve, mixed evenly to get the water phase, 1g essence is heated to 55℃ to get the oil phase, the water phase is sheared at 10000r / min, and the oil phase is added at the same time, and the emulsion is obtained after shearing evenly.

4. The method for preparing food flavor microcapsules according to claim 1, characterized in that: The step one: 5g β-cyclodextrin is added to water, heated to dissolve, mixed evenly to get the water phase, 1g essence is heated to 55℃ to get the oil phase, the water phase is sheared at 10000r / min, and the oil phase is added at the same time, and the emulsion is obtained after shearing evenly.

5. A drying apparatus for the preparation of food flavor microcapsules, characterized by: The utility model provides a kind of spray dryer, including bottom plate (1), the top of bottom plate (1) is fixedly connected with spray dryer (2), the top of spray dryer (2) is fixedly connected with hot gas pipe (3), the top of spray dryer (2) and located one side of hot gas pipe (3) is fixedly connected with raw material pipe (4), the top of bottom plate (1) is fixedly connected with heat exchange box (5), heat exchange cavity (31) is set in heat exchange box (5) inside, the inside of heat exchange cavity (31) is fixedly connected with heat exchange pipe (21), the both ends of heat exchange pipe (21) respectively pass through fixed box (22) and extend to the outside of fixed box (22), one end of heat exchange pipe (21) is fixedly connected with air inlet pipe (23), the other end of heat exchange pipe (21) is fixedly connected with air outlet pipe (24), the top of heat exchange box (5) is provided with guide groove (12), bottom groove (13) is set in heat exchange box (5) inside and below guide groove (12), second sealing gasket (55) is embedded in guide groove (12) inside, the bottom of second sealing gasket (55) is fixedly connected with guide block (14), the bottom end of guide block (14) passes through bottom groove (13) and extends to heat exchange cavity (31) inside, the bottom of guide block (14) is rotatably connected with rotating block (15), the bottom of rotating block (15) is fixedly connected with scraping sleeve (20), scraping sleeve (20) is located the outside of heat exchange pipe (21), the top of heat exchange box (5) is fixedly connected with first winding box (6), first winding roller (7) is rotatably connected in first winding box (6) inside, the top of heat exchange box (5) and located right side of first winding box (6) is fixedly connected with second winding box (9), second winding roller (11) is rotatably connected in second winding box (9) inside, the both ends of second sealing gasket (55) extend to first winding box (6) and second winding box (9) inside respectively, one end of second sealing gasket (55) is fixedly connected with the outside of first winding roller (7), the other end of second sealing gasket (55) is fixedly connected with the outside of second winding roller (11), the top of first winding box (6) is fixedly connected with first servo motor (8), the output end of first servo motor (8) is fixedly connected with the top end of first winding roller (7), the top of second winding box (9) is fixedly connected with second servo motor (10), the output end of second servo motor (10) is fixedly connected with the top end of second winding roller (11).

6. A drying apparatus for the preparation of food flavour microcapsules according to claim 5, characterised in that: The top of heat exchange box (5) is rotatably connected with five guide rollers (46), the outside of guide roller (46) is in contact with the inflection point of second sealing gasket (55), the top of heat exchange box (5) and located the outside of several guide rollers (46) and the outside of second sealing gasket (55) is fixedly connected with pressing plate (48).

7. A drying apparatus for the preparation of food flavour microcapsules according to claim 6, characterised in that: The top of the heat exchange pipe (21) is provided with a rail groove (16), the inside of the heat exchange pipe (21) and below the rail groove (16) is provided with a sealing groove (18), the sealing groove (18) is communicated with the inner cavity of the heat exchange pipe (21), the inner cavity of the heat exchange pipe (21) is placed with a scraping ring (19), the inside of the rail groove (16) is embedded with a first sealing pad (17), the bottom of the first sealing pad (17) is connected with the top of the scraping ring (19), the top of the fixed box (22) and above the air inlet pipe (23) and the air outlet pipe (24) are fixedly connected with a winding box (25), one side of the inner cavity of the winding box (25) is rotatably connected with a winding roller (26), the other side of the inner cavity of the winding box (25) is provided with a clockwork (28), one end of the winding roller (26) is connected with the clockwork (28), both ends of the first sealing pad (17) extend to the inside of the winding box (25) and are connected with the outer sides of the two winding rollers (26) respectively.

8. A drying apparatus for the preparation of food flavour microcapsules according to claim 7, characterised in that: The inside of the heat exchange box (5) and one side of the heat exchange cavity (31) are provided with a first receiving cavity (32), the first receiving cavity (32) is rotatably connected with a first receiving roller (33), the inside of the heat exchange box (5) and the other side of the heat exchange cavity (31) are provided with a second receiving cavity (34), the second receiving cavity (34) is rotatably connected with a second receiving roller (35), the outer side of the second receiving roller (35) is wound with a bottom pad (36), one end of the bottom pad (36) penetrates through the heat exchange cavity (31) and extends to the inside of the first receiving cavity (32) and is connected with the outer side of the first receiving roller (33), one side of the heat exchange box (5) is fixedly connected with a fifth servo motor (54), the output end of the fifth servo motor (54) is fixedly connected with one end of the second receiving roller (35), both ends of the heat exchange cavity (31) are rotatably connected with a stirring shaft (29), one side of the heat exchange box (5) and one end of the stirring shaft (29) are fixedly connected with a third servo motor (30), the output end of the third servo motor (30) is fixedly connected with one end of the stirring shaft (29).

9. A drying apparatus for the preparation of food flavour microcapsules according to claim 8, characterised in that: The top of the heat exchange box (5) is fixedly connected with a piston cylinder (44), one end of the piston cylinder (44) is fixedly connected with a connecting box (42), one side of the connecting box (42) is fixedly connected with a driving box (40), one end of the first receiving roller (33) extends to the inside of the driving box (40), one side of the driving box (40) is fixedly connected with a fourth servo motor (41), the output end of the fourth servo motor (41) is fixedly connected with one end of the first receiving roller (33).

10. A drying apparatus for the preparation of food flavour microcapsules according to claim 9, characterised in that: The connecting box (42) is rotatably connected with a reciprocating screw rod (43) inside, the outer side of the reciprocating screw rod (43) is threadedly connected with a piston column (45), one end of the piston column (45) extends into the piston cylinder (44) and cooperates with the piston cylinder (44) inside, one end of the piston cylinder (44) is fixedly connected with a connecting pipe (39), one side of the heat exchange box (5) is provided with a rotary joint (38), one end of the connecting pipe (39) is fixedly connected with one end of the rotary joint (38), the other end of the connecting pipe (39) extends into the piston cylinder (44), the first storage roller (33) is fixedly connected with a spray pipe (37) inside, one end of the spray pipe (37) extends into the bottom pad (36) and extends above the spray pipe (37), the other end of the spray pipe (37) is fixedly connected with one end of the rotary joint (38), one end of the reciprocating screw rod (43) extends into the drive box (40) and is rotatably connected with one side of the drive box (40) inner cavity, the first storage roller (33) and the outer side of the reciprocating screw rod (43) are both fixedly sleeved with a chain wheel (47) driven by a chain belt, the other side of the piston cylinder (44) is fixedly connected with a communication pipe (56), the other side of the heat exchange box (5) is fixedly connected with a liquid inlet pipe (49), the communication pipe (56) and the connecting pipe (39) are both fixedly connected with a one-way valve at the end inside the piston cylinder (44), one end of the communication pipe (56) is connected with the liquid inlet pipe (49), the liquid inlet pipe (49) and one end of the raw material pipe (4) both extend into the heat exchange cavity (31), the air outlet end of the spray dryer (2) is fixedly connected with one end of the air inlet pipe (23), one end of the air outlet pipe (24) is fixedly connected with a suction pipe (51), the top of the bottom plate (1) is fixedly connected with a cyclone dust collector (50), one end of the suction pipe (51) is connected with the air inlet end of the cyclone dust collector (50), the top of the bottom plate (1) and one side of the cyclone dust collector (50) are fixedly connected with a filter (52), the top of the bottom plate (1) and one side of the filter (52) are fixedly connected with an air extractor (53), one end of the air extractor (53) is connected with the air inlet end of the filter (52), the air inlet end of the filter (52) is connected with the air outlet end of the cyclone dust collector (50) through a pipeline.

Images