A spray freeze-drying tower and drying method of oyster peptide

Abstract

The present application belongs to the technical field of drying device, and specifically discloses a spray freeze drying tower, which comprises a support, a side frame and a spray dryer, the side frame is installed on one side of the outer wall of the support, the spray dryer is arranged above the side frame, a drying tower body is arranged in the support, a rectangular cylinder is throughly connected in the drying tower body, the port of the spray dryer is communicated with the inside of the drying tower body through the arranged conveying assembly, side rods are arranged on the inner walls of the rectangular cylinder, two sliding members are arranged on the inside of the two side rods, and a mesh net is connected to the two sliding members, a sliding frame is slidingly arranged in the inside of the two side rods, a material scattering element is arranged in the inside of the sliding frame and close to the middle part, and a driving element is arranged at the lower end of the inside of the sliding frame. The present application can well dry oyster peptide extract, and the drying process is sufficient and will not cause excessive adhesion.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of drying devices, and specifically discloses a spray freeze drying tower and a drying method of oyster peptide. BACKGROUND

[0002] In order to stably store high-value-added products such as medicines, biological products and food, it is often necessary to dry the liquid products into powders. Many active substances in these products are heat-sensitive and are easy to be inactivated under high-temperature conditions. In order to not destroy the active ingredients and ensure the drug efficacy, bioavailability and nutritional value of the products, a vacuum freeze drying method is often used for intermittent batch production, but the production time of each batch of products is very long, the vacuum degree is high, the energy consumption is large, the product particle size is large and the distribution is wide, and even the product is caked. In order to reduce the product particle size, shorten the production time, reduce the energy consumption and production cost, and increase the solubility or dissolution rate of the product, a spray freeze drying technology has been developed in recent years. The technology is a process of atomizing liquid, freezing ice particles after fully contacting with a cold medium, and drying the ice particles into powder particles, which can prepare porous micropowder products with high biological activity, low density, high specific surface area and high solubility or dissolution rate.

[0003] The existing device cannot well dry oyster peptide extract during use, and the structure is simple. During the spray freeze drying process, the lower the temperature, the greater the viscosity of the material, the larger the droplet particle size after atomization, and the droplet particle size is not easy to control, which leads to a long drying time at the rear end, the need for manual intervention multiple times, frequent shutdown, and the influence on the use of the device. Therefore, we need to improve it. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art, and a spray freeze drying tower is provided, which comprises a support, a side frame and a spray dryer, the side frame is installed on one side of the outer wall of the support, the spray dryer is arranged above the side frame, the support is internally provided with a drying tower body, a rectangular cylinder is connected through the inside of the drying tower body, a conveying assembly is communicated with the inside of the drying tower body through the port of the spray dryer, side rods are arranged on both sides of the inner wall of the rectangular cylinder, two side rods are internally connected with a mesh through corresponding sliding members, and a sliding frame is internally and slidingly installed in the two side rods, a material scattering piece is arranged in the inside of the sliding frame and close to the middle, and a driving piece is arranged at the lower end of the inside of the sliding frame.

[0005] Preferably, the conveying assembly comprises a conveying pipe communicated and installed at the port of the spray dryer, a spraying device is communicated and installed at the end of the conveying pipe away from the spray dryer, the spraying device is fixedly arranged in the upper part of the inside of the drying tower body through a connecting pipe fixedly arranged on the upper surface, and a plurality of spraying heads are arranged in the lower part of the inside of the spraying device.

[0006] Preferably, the sliding member comprises a clamping seat slidingly installed inside the side rod, and the pocket net is clamped inside the clamping seat.

[0007] Preferably, the bulk material member comprises a rotating rod rotatably connected to the sliding frame and located near the middle, a gear is sleeved outside the rotating rod, a toothed rod is arranged at the rear end of the inner wall of the rectangular cylinder, the gear and the toothed rod are in meshing engagement, a T-shaped rod is arranged at the lower end of the rotating rod, and swing members are arranged at both sides of the T-shaped rod.

[0008] Preferably, the swing member comprises a circular rod slidingly inserted into one side of the T-shaped rod, a spring is sleeved outside the circular rod and above the T-shaped rod, a disc is fixedly arranged at the bottom end of the circular rod, a plurality of distribution rods are arranged at the bottom of the disc, and a stop bead is arranged at the lower end of each distribution rod.

[0009] Preferably, the driving member comprises a lead screw and a sliding rod, one end of the lead screw is rotatably installed in the rectangular cylinder, and a motor is installed at the other end of the lead screw, the motor is fixedly arranged outside the rectangular cylinder through a supporting plate, the lead screw is in threaded connection with the sliding frame, one end of the sliding rod away from the lead screw is in sliding connection with the sliding frame, the sliding rod is fixedly arranged inside the rectangular cylinder and away from the lead screw, a rotating shaft is rotatably inserted into the lower part of the sliding frame, a sleeve is arranged at the middle of the outer side of the rotating shaft, a plurality of fixed sleeves are arranged outside the sleeve, a curved rod is arranged at one side of the outer wall of each fixed sleeve, a clamping shaft is rotatably inserted into the inner side of one end of the curved rod away from the fixed sleeve, a sleeve is fixedly arranged at both ends of the outer side of the clamping shaft, arc-shaped scraping pieces are installed on the outer surface of the sleeve along the circumferential direction, and a roller is sleeved at both ends of the outer side of the rotating shaft, and the outer surfaces of the two rollers are in rolling contact with the inner surface of the rectangular cylinder.

[0010] Preferably, a sealing plate is sealingly clamped at the front end of the rectangular cylinder, a pulling plate is arranged at the upper end of the sealing plate, lifting rods are fixedly arranged at the lower part of the outer side of the drying tower body, and the sides of the two lifting rods away from the drying tower body are connected with the support.

[0011] A drying method of oyster peptide, which uses the above-mentioned spray freeze drying tower, comprises the following use method.

[0012] S1: the clamping seat and the pocket net are pulled out from the inside of the rectangular cylinder by removing the sealing plate, then the extract of oyster peptide is placed in the pocket net, and then the sealing plate is closed by pushing back into the rectangular cylinder;

[0013] S2: after the spray dryer is started, the extract of oyster peptide in the pocket net is dried through the conveying pipe and the spraying device, during the drying process, the motor drives the lead screw to rotate at the rear end, and under the sliding clamping of the sliding rod, the sliding frame in threaded connection with the lead screw moves forward and backward in the rectangular cylinder.

[0014] S3: In the moving process of the sliding frame, the roller rolls and fits with the inner surface of the rectangular cylinder, so that the rotating shaft, the sleeve, the fixed sleeve, the curved rod, the sleeve shell and the scraper roll at the lower end of the net, and after the curved rod rotates for one circle, the sleeve shell and the scraper press the outer surface of the net, so as to stir the oyster peptide extract in the drying process, thereby reducing the adhesion between the materials and making the materials uniformly dry.

[0015] S4: In the moving process of the rotating rod and the gear in the middle of the sliding frame, the gear is engaged with the toothed rod, so as to drive the rotating rod and the T-shaped rod to rotate the circular rods at both ends, so as to stir the materials on the inner surface of the net, thereby accelerating the drying rate of the oyster peptide extract.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The sliding part is provided, which can be connected with the side rod through the clamping seat, so that the materials in the net can be conveniently collected.

[0018] 2. The roller, rotating shaft, sliding frame, driving part, sleeve, curved rod, sleeve shell and scraper are provided, so that the extract in the net can be stirred when moving forward and backward in the rectangular cylinder, and the adhesion of the materials can be reduced in the freeze-drying process.

[0019] 3. The toothed rod, gear, rotating rod, T-shaped rod, disc and stirring rod are provided, so that the extract can be stirred in the middle of the net, thereby further enhancing the drying rate of the oyster peptide extract by the device. DETAILED DESCRIPTION

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is another angle structure schematic diagram of the present application;

[0022] Figure 3 It is a schematic diagram of the connection between the drying tower and the inner side of the rectangular cylinder of the present application;

[0023] Figure 4 It is a schematic diagram of the connection between the sliding part and the side rod of the present application;

[0024] Figure 5 It is a schematic diagram of the connection between the sliding frame and the rotating rod of the present application;

[0025] Figure 6 It is a schematic diagram of the connection between the sleeve and the fixed sleeve installed on the outer side of the rotating shaft of the present application;

[0026] Figure 7 It is a schematic diagram of the connection between the sleeve and the fixed sleeve installed on the outer side of the rotating shaft of the present application; Figure 5

[0027] ​Figure 8 To achieve the above object Figure 6 The structural schematic diagram of B in the present application.

[0028] In the figure: 1, support; 2, side frame; 3, spray dryer; 4, drying tower main body; 5, rectangular cylinder; 6, lifting rod; 7, motor; 8, sealing plate; 9, pull plate; 10, conveying pipe; 11, connecting pipe; 12, spraying device; 13, spraying head; 14, side rod; 15, sliding frame; 16, lead screw; 17, pocket net; 18, sliding rod; 19, clamping seat; 20, rotating rod; 21, gear; 22, T-shaped rod; 23, spring; 24, round rod; 25, disc; 26, rotating shaft; 27, roller; 28, sheath; 29, fixing sleeve; 30, distribution rod; 31, stop bead; 32, curved rod; 33, clamping shaft; 34, sleeve; 35, scraper; 36, toothed rod. DETAILED DESCRIPTION

[0029] In order to enable the above object, features and advantages of the present application to be more clearly understood, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] As Figures 1-8 shown in the figure, a spray freeze drying tower includes a support 1, a side frame 2 and a spray dryer 3, the side frame 2 is installed on one side of the outer wall of the support 1, the spray dryer 3 is arranged above the side frame 2, a drying tower main body 4 is arranged inside the support 1, a rectangular cylinder 5 is connected through the inside of the drying tower main body 4, a conveying assembly is arranged at the port of the spray dryer 3 to communicate with the inside of the drying tower main body 4, side rods 14 are arranged on both sides of the inner wall of the rectangular cylinder 5, two side rods 14 are connected through corresponding sliding members to have a pocket net 17 in common, the sliding frame 15 is slidably installed inside the two side rods 14, the scattering member is arranged inside the sliding frame 15 and close to the middle, and the driving member is arranged at the lower end of the sliding frame 15.

[0032] The conveying assembly includes a conveying pipe 10 which is communicated and installed at the port of the spray dryer 3, the conveying pipe 10 is communicated and installed with a spraying device 12 at the end away from the spray dryer 3, the spraying device 12 is fixedly arranged inside the drying tower main body 4 and above through the connecting pipe 11 fixedly installed on the upper surface, and a plurality of spraying heads 13 are arranged inside the lower part of the spraying device 12.

[0033] Referring to the drawings Figure 3 It can be seen that the spray dryer 3 is an existing device, and the inside of the drying tower main body 4 is dried through the conveying pipe 10 and the spraying device 12.

[0034] The sliding member comprises a clamping seat 19 slidingly installed inside the side rod 14, and the pocket net 17 is clamped inside the clamping seat 19;

[0035] Referring to the drawings attached to the specification Figure 3 and Figure 4 As can be seen, the clamping seat 19 can install the pocket net 17, and the pocket net 17 can be made of a wear-resistant fiber net, and the sliding cooperation between the clamping seat 19 and the side rod 14 can facilitate the later taking of materials by the pocket net 17.

[0036] The bulk material piece comprises a rotating rod 20 rotatably connected inside the sliding frame 15 and close to the middle, a gear 21 is sleeved outside the rotating rod 20, a toothed rod 36 is arranged at the rear end of the inner wall of the rectangular cylinder 5, the gear 21 and the toothed rod 36 are in meshing relationship with each other, a T-shaped rod 22 is arranged at the lower end of the rotating rod 20, swing pieces are arranged inside the T-shaped rod 22 on both sides, the swing piece comprises a round rod 24 slidingly inserted into one side of the T-shaped rod 22, a spring 23 is sleeved outside the round rod 24 and above the T-shaped rod 22, a disc 25 is fixedly arranged at the bottom end of the round rod 24, a plurality of distribution rods 30 are arranged at the bottom of the disc 25, and a stop bead 31 is arranged at the lower end of each of the plurality of distribution rods 30;

[0037] Referring to the drawings attached to the specification Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 As can be seen, when the rotating rod 20 moves with the sliding frame 15, the gear 21 outside the rotating rod 20 meshes with the toothed rod 36, thereby driving the T-shaped rod 22 and the disc 25 at the lower end of the rotating rod 20 to rotate, so that the plurality of distribution rods 30 and the stop beads 31 can distribute the materials in the pocket net 17, thereby reducing the adhesion of the materials and better drying the materials.

[0038] The driving member comprises a lead screw 16 and a sliding rod 18, one end of the lead screw 16 is rotatably installed inside the rectangular cylinder 5, the other end is provided with a motor 7, the motor 7 is fixedly arranged outside the rectangular cylinder 5 through the outer side of the supporting plate, the lead screw 16 is in threaded connection with the sliding frame 15, the end of the sliding frame 15 away from the lead screw 16 is in sliding connection with the sliding rod 18, the sliding rod 18 is fixedly arranged inside the rectangular cylinder 5 and away from the lead screw 16 on one side, a rotating shaft 26 is rotatably inserted into the inside of the sliding frame 15 and below, a sleeve 28 is arranged at the middle of the outer side of the rotating shaft 26, a plurality of fixed sleeves 29 are arranged outside the sleeve 28, a curved rod 32 is arranged on one side of the outer wall of each of the plurality of fixed sleeves 29, a clamping shaft 33 is rotatably inserted into the inside of one end of the curved rod 32 away from the fixed sleeve 29, a sleeve 34 is fixedly arranged at both ends of the outside of the clamping shaft 33, arc-shaped scraping pieces 35 are installed on the outer surface of the sleeve 34 along the circumferential direction at equal distances, and a roller 27 is sleeved at both ends of the outside of the rotating shaft 26, the outer surfaces of the two rollers 27 are in rolling contact with the inner surface of the rectangular cylinder 5;

[0039] Referring to the drawings attached to the specification Figure 1 ,Figure 6 and Figure 8 It can be seen that the motor 7 drives the lead screw 16 to rotate, and under the sliding clamping of the sliding rod 18, the sliding frame 15 moves forward and backward inside the rectangular cylinder 5, and the sliding frame 15 also drives the rotating shaft 26 and the structure outside the rotating shaft 26 to move, under the driving of the rollers 27 outside the rotating shaft 26, the rollers 27 roll on the inner surface of the rectangular cylinder 5, and then the fixed sleeve 29 and the curved rod 32 outside the sleeve 28 rotate, the curved rod 32 is also arranged in a cross shape, so that the sleeve 34 and the scraper 35 contact the pocket net 17 from below the outside of the pocket net 17, and push up the material inside the pocket net 17.

[0040] The front end of the rectangular cylinder 5 is sealingly clamped with the sealing plate 8, the upper end of the sealing plate 8 is provided with the pull plate 9, and the outer side of the drying tower body 4 is fixedly provided with the lifting rod 6 from below, and the side of the two lifting rods 6 away from the drying tower body 4 is connected with the support 1.

[0041] Reference drawings Figure 1 and Figure 2 It can be seen that the sealing plate 8 and the pull plate 9 are used to block the material taking port at the front end of the rectangular cylinder 5, so that the sealing property of the drying tower body 4 can be ensured during drying, and the lifting rod 6 is arranged to support outside the drying tower body 4, thereby enhancing the stability.

[0042] A drying method of oyster peptide, using the above-mentioned spray freeze drying tower, comprising the following use method:

[0043] S1: remove the sealing plate 8, pull out the clamping seat 19 and the pocket net 17 from the inside of the rectangular cylinder 5, then place the oyster peptide extract inside the pocket net 17, and then push it back into the inside of the rectangular cylinder 5, and close the sealing plate 8;

[0044] S2: after the spray dryer 3 is started, the oyster peptide extract inside the pocket net 17 is dried through the conveying pipe 10 and the spraying device 12, and during the drying process, the motor 7 drives the lead screw 16 to rotate at the rear end, and under the sliding clamping of the sliding rod 18, the sliding frame 15 connected with the lead screw 16 threadedly moves forward and backward inside the rectangular cylinder 5;

[0045] S3: during the movement of the sliding frame 15, the rollers 27 roll and fit with the inner surface of the rectangular cylinder 5, so that the rotating shaft 26, the sleeve 28, the fixed sleeve 29, the curved rod 32, the sleeve 34 and the scraper 35 roll at the lower end of the pocket net 17, and after the curved rod 32 rotates for one turn, the sleeve 34 and the scraper 35 press the outer surface of the pocket net 17, thereby stirring the oyster peptide extract during the drying process, thereby reducing the adhesion between the materials, so that the materials can be uniformly dried;

[0046] S4: the rotating rod 20 and the gear 21 at the middle of the sliding frame 15 are engaged with the toothed rod 36 during the movement, which drives the rotating rod 20 and the T-shaped rod 22 to rotate the round rod 24 at the two ends, so as to stir the material on the inner surface of the mesh 17, thereby accelerating the drying rate of the oyster peptide extract.

[0047] Working principle: in use, the staff member pulls the pull plate 9 to take off the sealing plate 8 from the inner front end of the rectangular cylinder 5, places the oyster peptide extract to be dried into the mesh 17, and then reassembles the sealing plate 8 to ensure the sealing of the drying tower main body 4 and the rectangular cylinder 5, and then starts the spray dryer 3 to dry the oyster peptide extract in the mesh 17 through the conveying pipe 10 and the spraying device 12; the motor 7 drives the screw rod 16 in the rectangular cylinder 5 to rotate at the rear end, and the sliding frame 15 drives the rotating shaft 26, the roller 27 and the sleeve 28 to move; during the movement, the roller 27 rolls in contact with the inner surface of the rectangular cylinder 5, which drives the rotating shaft 26 to rotate the fixed sleeve 29 and the curved rod 32; then the clamping shaft 33 at one end of the curved rod 32 contacts the outer surface of the mesh 17 containing the oyster peptide extract during the rotation, the shell 34, the curved rod 32 and the scraper 35 can extrude the oyster peptide extract from the outside below, so that the position of the oyster peptide extract changes flexibly, reducing the adhesion of the material; the gear 21 at the middle of the sliding frame 15 is engaged with the toothed rod 36 during the movement, which drives the rotating rod 20 to rotate the T-shaped rod 22 below; during the upward lifting of the mesh 17, the disc 25, the distribution rod 30 and the stop bead 31 contact the material on the inner surface of the mesh 17; when the curved rod 32 is in hard contact with the disc 25 during the rotation and pressing against the mesh 17, the round rod 24 automatically moves upward flexibly, and then resets under the elastic stretching of the spring 23, which can reduce the hard friction during the upward and downward stirring of the mesh 17, thereby further improving the drying effect of the oyster peptide extract.

[0048] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A spray freeze-drying tower, comprising a support frame (1), side frames (2), and a spray dryer (3), characterized in that: The side frame (2) is installed on one side of the outer wall of the support (1). The spray dryer (3) is set above the side frame (2). The support (1) is equipped with a drying tower body (4). A rectangular cylinder (5) is connected through the drying tower body (4). The port of the spray dryer (3) is connected to the inside of the drying tower body (4) through a set conveying component. Side rods (14) are set on both sides of the inner wall of the rectangular cylinder (5). The two side rods (14) are connected to a net (17) through corresponding sliding parts. A sliding frame (15) is slidably installed inside the two side rods (14). A loose material part is set inside the sliding frame (15) and a driving part is set at the lower end of the sliding frame (15). The bulk component includes a rotating rod (20) rotatably connected inside the slide frame (15) and near the middle. A gear (21) is fitted on the outside of the rotating rod (20). A toothed rod (36) is provided at the rear end of the inner wall of the rectangular tube (5). The gear (21) and the toothed rod (36) mesh with each other. A T-shaped rod (22) is provided at the lower end of the rotating rod (20). Swinging components are provided on both sides inside the T-shaped rod (22). The swinging component includes a round rod (24) that slides through one side of the T-shaped rod (22). A spring (23) is fitted on the outside of the round rod (24) and above the T-shaped rod (22). A disc (25) is fixedly provided at the bottom end of the round rod (24). Multiple dispensing rods (30) are provided at the bottom of the disc (25). Each of the multiple dispensing rods (30) has a stop bead (31) at its lower end. The driving component includes a lead screw (16) and a slide rod (18). One end of the lead screw (16) is rotatably mounted inside the rectangular tube (5), and the other end is equipped with a motor (7). The motor (7) is fixedly mounted on the outside of the rectangular tube (5) by an outer support plate. The lead screw (16) is threadedly connected to the slide frame (15). The end of the slide frame (15) away from the lead screw (16) is slidably connected to the slide rod (18). The slide rod (18) is fixedly mounted inside the rectangular tube (5) on the side away from the lead screw (16). A rotating shaft (26) is rotatably inserted into the lower part of the slide frame (15). A sleeve (28) is provided in the middle of the outer side. Multiple sets of fixed sleeves (29) are provided on the outer side of the sleeve (28). A crank rod (32) is provided on one side of the outer wall of each set of fixed sleeves (29). A retaining shaft (33) is inserted into the end of the crank rod (32) away from the fixed sleeve (29). A sleeve shell (34) is fixedly provided at both ends of the retaining shaft (33). Arc-shaped scrapers (35) are installed at equal intervals along the circumferential direction on the outer surface of the sleeve shell (34). Rollers (27) are fitted on both ends of the rotating shaft (26). The outer surfaces of the two sets of rollers (27) roll on the inner surface of the rectangular tube (5).

2. The spray freeze-drying tower according to claim 1, characterized in that: The conveying assembly includes a conveying pipe (10) connected to the port of the spray dryer (3). A spraying device (12) is connected to one end of the conveying pipe (10) away from the spray dryer (3). The spraying device (12) is fixedly installed above the inside of the drying tower body (4) through a connecting pipe (11) fixedly installed on the upper surface. Multiple spray heads (13) are provided below the inside of the spraying device (12).

3. The spray freeze-drying tower according to claim 1, characterized in that: The sliding element includes a card seat (19) that is slidably installed inside the side rod (14), and one side of the net (17) is locked inside the card seat (19).

4. The spray freeze-drying tower according to claim 1, characterized in that: The rectangular tube (5) is sealed with a sealing plate (8) at the front end. A pull plate (9) is provided on the upper end of the sealing plate (8). Lifting rods (6) are fixedly installed on the lower side of the main body of the drying tower (4). The two lifting rods (6) are connected to the support (1) on the side away from the main body of the drying tower (4).

5. A method for drying oyster peptides, using any one of the spray freeze-drying towers according to claims 1-4, comprising the following usage methods: S1: Remove the sealing plate (8), pull the card holder (19) and net (17) out from the inside of the rectangular tube (5), then place the oyster peptide extract inside the net (17), and then push it back into the rectangular tube (5) to seal the sealing plate (8); S2: After the spray dryer (3) is started, the oyster peptide extract inside the net (17) is dried through the conveying pipe (10) and the spraying device (12). During the drying process, the motor (7) drives the lead screw (16) to rotate at the rear end. Under the sliding position of the slide bar (18), the slide frame (15) threadedly connected to the lead screw (16) moves back and forth inside the rectangular cylinder (5). S3: During the movement of the sliding frame (15), the roller (27) rolls and adheres to the inner surface of the rectangular tube (5), causing the rotating shaft (26), sleeve (28), fixed sleeve (29), crank rod (32), shell (34), and scraper (35) to roll at the lower end of the net (17). After the crank rod (32) rotates once, the shell (34) and scraper (35) squeeze the outer surface of the net (17), thereby moving the oyster peptide extract during the drying process, thereby reducing the stickiness between materials and enabling the materials to dry evenly. S4: During the movement of the rotating rod (20) and gear (21) in the middle of the sliding frame (15), the gear (21) meshes with the rack (36), causing the rotating rod (20) and T-shaped rod (22) to drive the round rods (24) at both ends inside to rotate, thereby picking up the material on the inner surface of the net (17) and accelerating the drying rate of the oyster peptide extract.

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