A low-temperature drying device and drying method for preparing sea cucumber peptides

Abstract

The present invention provides a low-temperature drying device and a drying method for preparing sea cucumber peptides, which relates to the technical field of low-temperature drying. The device includes a fixed frame, on the surface of which a first fan, a filter dryer, a refrigeration unit, and an atomization chamber are sequentially installed from left to right. A gas sensor and a vibrator are arranged on the right side of the fixed frame. The device further includes: an atomization chamber is internally provided with a centrifugal atomizer; a separation chamber is arranged on the right side of the atomization chamber; a plurality of filter plates are arranged in an annular array inside the separation chamber; a return air pipe is arranged on the surface of the separation chamber, and both ends of the return air pipe are located in first circular grooves symmetrically opened on the surface of the separation chamber; a perforated circular plate is arranged inside the return air pipe, and a plurality of sector-shaped sealing pads are arranged in an annular array on the surface of the perforated circular plate. The present invention can improve the separation efficiency of the finer particles of the freeze-dried sea cucumber peptides and enable partial gas inside the separation chamber to circulate in a reflux manner to increase the separation efficiency of water vapor and the freeze-dried sea cucumber peptides.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature drying, and particularly to a low-temperature drying device and a drying method for preparing sea cucumber peptides. Background Art

[0002] Sea cucumber peptide is a bioactive peptide extracted from sea cucumbers, containing various proteins, amino acids, minerals and bioactive substances.

[0003] The preparation method of sea cucumber peptide often uses the enzymatic hydrolysis method. By using specific enzymes to hydrolyze sea cucumbers, their proteins can be decomposed into small molecule peptides. After the enzymatic hydrolysis, centrifugation is often used to separate the undigested solid part and the small molecule peptides in the liquid phase, so as to further collect and purify the sea cucumber peptides in the liquid phase. For the purified sea cucumber peptides, low-temperature drying equipment is often used to make the sea cucumber peptides into freeze-dried powder to maintain their biological activity.

[0004] The existing low-temperature drying equipment often uses a cyclone separator in combination to facilitate the collection of sea cucumber peptide freeze-dried powder. The cyclone separator has a better separation effect on larger particles, but a relatively lower effect on finer particles. For the freeze-dried powder of sea cucumber peptides containing powders of different particle sizes, especially finer powders, the cyclone separator has limited separation effect on them, and it is easy to cause partial leakage of the powder. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a low-temperature drying device for preparing sea cucumber peptides. By using a filter plate, the finer particle freeze-dried powder of sea cucumber peptides can be intercepted, and sedimentation collection is carried out by combining the action of centrifugal force and gravity. By setting a return air pipe, the gas inside the separation chamber can be controlled to flow back and circulate in a certain proportion to increase the separation efficiency of water vapor and the freeze-dried powder of sea cucumber peptides.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A low-temperature drying device for preparing sea cucumber peptides, including a fixed frame. On the surface of the fixed frame, a first fan, a filter dryer, a refrigeration unit, and an atomization chamber are sequentially installed from left to right. A gas sensor and a vibrator are arranged on the right side of the fixed frame. The device further includes:

[0008] An atomizing sprayer is arranged inside the atomization chamber, which is used to atomize the purified liquid-phase sea cucumber peptides, so that the dry cold air blown into the atomization chamber from the refrigeration unit can dry the liquid-phase sea cucumber peptides.

[0009] A separation chamber is arranged on the right side of the atomization chamber, which is used to separate the air flow blown into the separation chamber from the atomization chamber into the freeze-dried powder of sea cucumber peptides.

[0010] The interior of the separation chamber is provided with a plurality of filter plates in an annular array, which are used to improve the filtering efficiency of the separation chamber for the sea cucumber peptide freeze-dried powder;

[0011] The surface of the separation chamber is provided with an air return pipe, and the two ends of the air return pipe are respectively located in the first circular grooves symmetrically opened on the surface of the separation chamber, and the air return pipe is used to further improve the filtering efficiency of the filter plate on the sea cucumber peptide freeze-dried powder;

[0012] A circular plate with holes is arranged inside the return air pipe, and a plurality of fan-shaped blocking pads are arranged in a ring array on the surface of the circular plate with holes, and the fan-shaped blocking pads are used to block the small holes on the surface of the circular plate with holes to control the reflux ratio of the airflow inside the separation chamber;

[0013] A collecting box is provided at the bottom of the separation chamber, so that the separated sea cucumber peptide freeze-dried powder can be taken out from the inside of the device in time to reduce the probability of the sea cucumber peptide freeze-dried powder mixing with water vapor again.

[0014] Furthermore, a flow equalizing plate is fixedly connected to the interior of the atomizing chamber, a centrifugal sprayer is installed in a mounting groove opened on the surface of the flow equalizing plate, an air guide pipe is fixedly connected to the second circular groove opened on the surface of the atomizing chamber, the air guide pipe is connected to the air outlet of the refrigeration unit, a feed pipe is fixedly connected to the feed port of the centrifugal sprayer, the feed pipe passes through the surface of the atomizing chamber and extends to the outside of the atomizing chamber, the feed pipe is fixedly connected to the atomizing chamber, the atomizing chamber is connected to the air inlet of the separation chamber through a U-shaped tube, and the vibrator is installed on the surface of the separation chamber.

[0015] Furthermore, a fixed shaft is provided inside the separation chamber, and the fixed shaft is rotatably connected to two third circular grooves opened on the surface of the separation chamber through two first bearings. The filter plate is fixedly connected to the surface of the fixed shaft in an annular array, and the filter plate is in contact with the planar inner wall of the separation chamber, and the filter plate is not in contact with the curved inner wall of the separation chamber.

[0016] Furthermore, a perforated circular plate is fixedly connected to the right side pipe opening of the return air duct, the gas sensor is installed at a position on the surface of the separation chamber close to the perforated circular plate, a side of the perforated circular plate away from the separation chamber is fixedly connected to a plurality of adjusting blocks in a ring array, a rotating block is hinged on the surface of the adjusting block, the fan-shaped sealing pad is fixedly connected to the rotating block, and the fan-shaped sealing pad is penetrated into a rectangular through groove opened on the surface of the adjusting block, a first motor is installed on the surface of the perforated circular plate, a driving gear is fixedly connected to the end of the output shaft of the first motor, a driven gear is fixedly connected to the surface of the rotating block, a central axis of the driven gear coincides with the rotating axis of the rotating block rotating around the adjusting block, and the driven gears are meshingly connected to the driving gear, and a second fan is installed in the left side pipe opening of the return air duct.

[0017] Furthermore, two arc-shaped grooves are provided on the surface of the adjustment block, and the curvature and arc length of the two arc-shaped grooves respectively correspond to the two arc-shaped edges of the fan-shaped sealing pad, and an I-shaped block is provided inside the arc-shaped groove, and the I-shaped block is slidingly connected to the adjustment block through the arc-shaped groove, and the I-shaped block is fixedly connected to the fan-shaped sealing pad, and a spring rope is provided inside the arc-shaped groove, and the two ends of the spring rope are respectively fixedly connected to the adjustment block and the I-shaped block.

[0018] Furthermore, a material passing trough is provided on the surface of the separation chamber near the bottom, the collecting box is fixedly connected to the surface of the separation chamber, the material passing trough is located inside the collecting box, a sealing door is hinged on the surface of the collecting box, a second motor is installed inside the collecting box, a cross-shaped scraper is fixedly connected to the end of the output shaft of the second motor, and the upper surface and bottom surface of the cross-shaped scraper are in conflict with the inner wall of the collecting box.

[0019] Furthermore, a fixed cylinder is fixedly connected to the surface of the separation chamber, an electric push rod is installed inside the fixed cylinder, a compression spring is arranged inside the fixed cylinder, a connecting plate and a friction plate are fixedly connected to both ends of the compression spring, the connecting plate and the friction plate are both slidably connected to the fixed cylinder, the friction plate is always in conflict with the fixed shaft, and the output shaft of the electric push rod is fixedly connected to the connecting plate.

[0020] Furthermore, support bars are evenly embedded in the interior of the sector-shaped sealing pad, and the central axes of the support bars intersect with the rotation axis of the sector-shaped sealing pad.

[0021] Furthermore, a constraint groove is provided on the surface of the rotating block, a T-shaped slider is arranged inside the constraint groove, the T-shaped slider is slidably connected to the rotating block, a U-shaped pressure rod is arranged between the rotating block and the adjusting block, the U-shaped pressure rod is rotatably connected to the rotating block and the adjusting block through two bearing seats, and the surface of the U-shaped pressure rod is always in contact with the part of the fan-shaped sealing pad located on the surface of the perforated circular plate.

[0022] Furthermore, a low-temperature drying method for preparing sea cucumber peptides comprises the following steps:

[0023] Step 1, inserting the feed pipe into the purified liquid phase sea cucumber peptide container, starting the centrifugal sprayer, and allowing the cold air flow blown into the atomization chamber to perform low temperature drying on the atomized liquid phase sea cucumber peptide;

[0024] Step 2: The airflow entering the atomization chamber carries the sublimated water vapor and freeze-dried sea cucumber peptide powder through the U-shaped elbow into the separation chamber. Part of the freeze-dried sea cucumber peptide powder accumulates at the bottom of the separation chamber by hitting the inner wall of the separation chamber under the action of centrifugal force and gravity. Part of the freeze-dried sea cucumber peptide powder is intercepted by the filter plate and accumulates at the bottom of the separation chamber under the action of gravity. The water vapor is discharged from the device through the air outlet of the separation chamber;

[0025] Step 3: When the content of freeze-dried sea cucumber peptide powder in the airflow at the gas sensor exceeds the set value, start the second fan and the first motor. The operation of the first motor causes the rotating block to rotate around the adjusting block and drives the sector-shaped sealing pad to move on the surface of the perforated circular plate to change the permeability of the small holes on the surface of the perforated circular plate. The operation of the second fan makes the airflow pass through the small holes on the surface of the perforated circular plate and return to the inside of the separation chamber near the air inlet of the separation chamber through the return air pipe, increasing the separation efficiency of the freeze-dried sea cucumber peptide powder in the reflux airflow;

[0026] Step 4: Regularly take out the freeze-dried sea cucumber peptide powder from the inside of the collection box to reduce the probability of this part of the freeze-dried sea cucumber peptide powder remixing with water vapor.

[0027] The above solution of the present invention has at least the following beneficial effects:

[0028] In the above solution of the present invention, the filter plates arranged in an annular array inside the separation chamber can improve the separation efficiency of the freeze-dried sea cucumber peptide powder. By controlling the extrusion force of the friction plate on the fixed shaft, the rotation rate of the filter plate under the influence of airflow can be controlled to ensure the separation effect of the filter plate on the freeze-dried sea cucumber peptide powder and water vapor;

[0029] Through the settings of the collection box, the cross-shaped scraper, and the material passing groove, the freeze-dried sea cucumber peptide powder can be taken out regularly, reducing the secondary mixing and contamination of the freeze-dried sea cucumber peptide powder with water vapor;

[0030] By adjusting the blockage rate of the small holes on the surface of the perforated circular plate by the sector-shaped sealing pad, the filtration efficiency of the filter plate and the separation efficiency of the freeze-dried sea cucumber peptide powder from water vapor under the action of centrifugal force and gravity are improved, enabling the device to have the ability to dynamically adjust the separation efficiency of sea cucumber peptide. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure provided by the present invention.

[0032] Figure 2 It is a schematic diagram of the uniform flow plate in the present invention.

[0033] Figure 3 It is a schematic diagram of the compression spring in the present invention.

[0034] Figure 4 It is a schematic diagram of the cross-shaped scraper in the present invention.

[0035] Figure 5 It is a schematic diagram of the adjusting block in the present invention.

[0036] Figure 6 It is a schematic diagram of the driven gear in the present invention.

[0037] Figure 7 It is a schematic diagram of the U-shaped pressure rod in the present invention.

[0038] Figure 8 It is the present invention Figure 6 An enlarged view of part A in it.

[0039] Figure 9 It is the present invention Figure 7 An enlarged view of part B in it.

[0040] Figure 10 It is a schematic diagram of the support bar in the present invention.

[0041] In the figure: 101, fixed frame; 102, first blower; 103, filter dryer; 104, refrigeration unit; 105, atomization chamber; 106, gas sensor; 107, vibrator;

[0042] 201, centrifugal atomizer; 202, flow equalizing plate; 203, feed pipe; 204, gas guide pipe; 205, separation chamber; 206, fixed shaft; 207, filter plate; 208, return air pipe; 209, perforated circular plate; 210, first motor; 211, driving gear; 212, driven gear; 213, adjusting block; 214, rotating block; 215, sector-shaped sealing pad; 216, constraint groove; 217, T-shaped slider; 218, U-shaped pressure rod; 219, arc-shaped groove; 220, I-shaped block; 221, spring rope; 222, collection box; 223, sealing door; 224, cross-shaped scraper; 225, second motor; 226, material passing groove; 227, fixed cylinder; 228, electric push rod; 229, connecting piece; 230, compression spring; 231, friction plate; 232, second blower; 234, support bar. Detailed implementation manners

[0043] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0044] As Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a low-temperature drying device for preparing sea cucumber peptides, which includes a fixing frame 101. On the surface of the fixing frame 101, a first blower 102, a filter dryer 103, a refrigeration unit 104, and an atomization chamber 105 are sequentially installed from left to right. A gas sensor 106 and a vibrator 107 are arranged on the right side of the fixing frame 101. The device further includes:

[0045] An atomizing sprayer 201 is arranged inside the atomization chamber 105, which is used to atomize the purified liquid-phase sea cucumber peptides, so that the dry cold air blown into the atomization chamber 105 from the refrigeration unit 104 can dry the liquid-phase sea cucumber peptides.

[0046] A separation chamber 205 is arranged on the right side of the atomization chamber 105, which is used to separate the sea cucumber peptide freeze-dried powder from the air flow blown into the separation chamber 205 from the atomization chamber 105.

[0047] A number of filter plates 207 are arranged in an annular array inside the separation chamber 205, which is used to improve the filtration efficiency of the separation chamber 205 for the sea cucumber peptide freeze-dried powder.

[0048] An air return pipe 208 is arranged on the surface of the separation chamber 205. Both ends of the air return pipe 208 are located in the first circular grooves symmetrically opened on the surface of the separation chamber 205. The air return pipe 208 is used to further improve the filtration efficiency of the filter plate 207 for the sea cucumber peptide freeze-dried powder.

[0049] A perforated circular plate 209 is arranged inside the air return pipe 208. A number of sector-shaped sealing pads 215 are arranged in an annular array on the surface of the perforated circular plate 209. The small holes on the surface of the perforated circular plate 209 are blocked by the sector-shaped sealing pads 215 to control the reflux ratio of the air flow inside the separation chamber 205.

[0050] A collection box 222 is arranged at the bottom of the separation chamber 205, so that the separated sea cucumber peptide freeze-dried powder can be taken out of the device in time, reducing the probability of the sea cucumber peptide freeze-dried powder mixing with water vapor again.

[0051] In the embodiment of the present invention, by starting the first blower 102 on the fixing frame 101, the air flow is pumped into the filter dryer 103 through a pipeline for filtration and drying. The dried air flow passes through a pipeline and enters the refrigeration unit 104 for cooling. The cooled air flow enters the atomization chamber 105 through a pipeline to dry the atomized sea cucumber peptide liquid beads inside the atomization chamber 105.

[0052] The sea cucumber peptide freeze-dried powder and water vapor generated after drying are blown into the separation chamber 205 under the action of a strong air flow. A small amount of sea cucumber peptide freeze-dried powder will deposit inside the atomization chamber 105, and this part of the sea cucumber peptides can be collected when cleaning the device.

[0053] The airflow entering the interior of the separation chamber 205 along a tangential angle close to the separation chamber 205 will cause the freeze-dried sea cucumber peptide powder to tend to impact the inner wall of the separation chamber 205 under the action of gravity. At the same time, during the process of the airflow flowing along the curved inner wall of the separation chamber 205, part of the freeze-dried sea cucumber peptide powder will be filtered by the filter plate 207. Among them, part of the freeze-dried powder will adhere to the surface of the filter plate 207, and part will gather towards the bottom of the separation chamber 205 under the action of gravity, and then be collected and taken out from the collection box 222. When the content of the freeze-dried sea cucumber peptide powder in the airflow detected by the gas sensor 106 has not decreased to the set value, according to the content of the freeze-dried sea cucumber peptide powder at this position, the small holes on the surface of the perforated circular plate 209 are blocked in a moving proportion through the atomization chamber 105, so that part of the airflow returns to the position near the atomization chamber 105 inside the separation chamber 205 from the return air pipe 208 at a certain proportion, increasing its contact quantity with the filter plate 207 to improve the separation efficiency of the freeze-dried sea cucumber peptide powder.

[0054] As Figure 2 shown, a flow equalizing plate 202 is fixedly connected inside the atomization chamber 105. A centrifugal sprayer 201 is installed in the installation groove opened on the surface of the flow equalizing plate 202. A gas guide pipe 204 is fixedly connected in the second circular groove opened on the surface of the atomization chamber 105. The gas guide pipe 204 is communicated with the air outlet of the refrigeration unit 104. A feed pipe 203 is fixedly connected inside the feed port of the centrifugal sprayer 201. The feed pipe 203 penetrates through the surface of the atomization chamber 105 and extends to the outside of the atomization chamber 105. The feed pipe 203 is fixedly connected with the atomization chamber 105. The atomization chamber 105 is communicated with the air inlet of the separation chamber 205 through a U-shaped pipe. A vibrator 107 is installed on the surface of the separation chamber 205.

[0055] In the embodiment of the present invention, the centrifugal sprayer 201 draws the liquid-phase sea cucumber peptide from the container containing the liquid-phase sea cucumber peptide through the feed pipe 203, atomizes and sprays the liquid-phase sea cucumber peptide. The dry cold air flow introduced into the interior of the separation chamber 205 from the U-shaped pipe is mixed with the atomized liquid-phase sea cucumber peptide sprayed by the centrifugal sprayer 201, causing the water in the liquid-phase sea cucumber peptide to sublimate, thereby generating freeze-dried sea cucumber peptide powder and water vapor. Both follow the airflow and enter the interior of the separation chamber 205 tangentially to the corresponding circumference of the separation chamber 205 from the U-shaped pipe. The airflow entering the interior of the separation chamber 205 flows along the curved inner wall of the separation chamber 205 towards the air outlet of the separation chamber 205. The freeze-dried sea cucumber peptide powder remains inside the separation chamber 205 under the action of centrifugal force and gravity, and the water vapor is discharged from the air outlet of the separation chamber 205. The air outlet of the separation chamber 205 can be communicated with the air inlet of the first fan 102 through a pipeline to reduce the refrigeration burden of the refrigeration unit 104. At the same time, the filter dryer 103 will filter out the water and impurities in the air to introduce dry cold air into the interior of the atomization chamber 105.

[0056] As Figure 2 and Figure 3As shown, a fixed shaft 206 is arranged inside the separation chamber 205. The fixed shaft 206 is rotatably connected in two third circular grooves formed on the surface of the separation chamber 205 through two first bearings. The filter plates 207 are fixedly connected to the surface of the fixed shaft 206 in an annular array. The filter plates 207 are in contact with the planar inner wall of the separation chamber 205, and the filter plates 207 are not in contact with the curved inner wall of the separation chamber 205.

[0057] In the embodiment of the present invention, when air flows into the interior of the separation chamber 205, it will drive the fixed shaft 206 to rotate through the filter plates 207. During this process, the filter plates 207 filter and leave the freeze-dried sea cucumber peptides in the air flow, and under the action of gravity, they move towards the curved inner wall of the separation chamber 205. Part of the gas moves along the curved inner wall of the separation chamber 205 towards the air outlet of the separation chamber 205 through the gap between the filter plates 207 and the curved inner wall of the separation chamber 205. The freeze-dried sea cucumber peptides gather at the bottom of the separation chamber 205 under the action of gravity.

[0058] As Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, a perforated circular plate 209 is fixedly connected inside the right pipe orifice of the return air pipe 208. The gas sensor 106 is installed at a position on the surface of the separation chamber 205 close to the perforated circular plate 209. A number of adjusting blocks 213 are fixedly connected to the side of the perforated circular plate 209 away from the separation chamber 205 in an annular array. A rotating block 214 is hinged to the surface of the adjusting block 213. A sector-shaped sealing pad 215 is fixedly connected to the rotating block 214, and the sector-shaped sealing pad 215 is inserted through a rectangular through groove formed on the surface of the adjusting block 213. A first motor 210 is installed on the surface of the perforated circular plate 209. The end of the output shaft of the first motor 210 is fixedly connected with a driving gear 211. Driven gears 212 are fixedly connected to the surfaces of the rotating blocks 214. The central axis of the driven gear 212 coincides with the rotating shaft of the rotating block 214 rotating around the adjusting block 213. The driven gears 212 are all meshed with the driving gear 211. A second blower 232 is installed inside the left pipe orifice of the return air pipe 208.

[0059] In an embodiment of the present invention, when the gas sensor 106 detects that the content of sea cucumber peptide freeze-dried powder in the air flow near the perforated circular plate 209 exceeds the set value, the first motor 210 is controlled to rotate by a certain angle, so that the driving gear 211 drives the driven gear 212 to rotate. The rotation of the driven gear 212 drives the rotating block 214 on the surface of the adjusting block 213 to rotate. Furthermore, the rotating block 214 drives the sector-shaped sealing pad 215 to move by a certain angle on the surface of the perforated circular plate 209, so as to change the blocking rate of the sector-shaped sealing pad 215 to the small holes on the surface of the perforated circular plate 209, thereby controlling the air flow near the perforated circular plate 209 in the separation chamber 205 to flow back to the side of the separation chamber 205 near the air inlet of the separation chamber 205 from the return air pipe 208 at a certain ratio, so that the contact time of this part of the gas with the filter plate 207 is prolonged, and at the same time, the probability of its carrying the sea cucumber peptide freeze-dried powder hitting the inner wall of the separation chamber 205 is increased, so as to more effectively separate the sea cucumber peptide freeze-dried powder from the water vapor. When the sector-shaped sealing pad 215 completely blocks the small holes on the surface of the perforated circular plate 209, the second fan 232 does not operate. When there are small holes on the surface of the perforated circular plate 209 that remain unblocked, the second fan 232 operates, so that the air flow passes through the small holes on the surface of the perforated circular plate 209 and the return air pipe 208 to the area of the separation chamber 205 near the ventilation opening of the separation chamber 205. Sensors can be installed at the air inlet and outlet of the separation chamber 205 respectively. When the pressure difference between the wind pressures sensed by the two sensors in the separation chamber 205 is greater than the set value, the vibrator 107 operates. The operation of the vibrator 107 causes the separation chamber 205, the fixed shaft 206 and the filter plate 207 to vibrate, so that the sea cucumber peptide freeze-dried powder attached to the surfaces of the three falls off, and at the same time, the sea cucumber peptide freeze-dried powder blocking the sieve holes on the surface of the filter plate 207 is cleaned to a certain extent to ensure the separation effect of the filter plate 207 on the sea cucumber peptide freeze-dried powder. When the pressure difference between the wind pressures collected by the two sensors is still greater than the set value after the vibrator 107 has operated for a certain time, the alarm device outside the device can be triggered for manual cleaning and maintenance of the device.

[0060] For the monitoring method of the gas sensor 106, it may specifically include:

[0061] When the content of the freeze-dried sea cucumber peptide powder discharged from the air outlet of the separation chamber 205 is set to be less than C%, it is considered qualified. Then, the content of the freeze-dried sea cucumber peptide powder detected at the gas sensor 106 should be less than C + X%. The value of X is affected by the filtration efficiency, quantity of the filter plate 207, and the installation position of the gas sensor 106. The filtration efficiency and quantity of the filter plate 207 are negatively correlated with the value of X. The closer the installation position of the gas sensor 106 is to the air outlet of the separation chamber 205, the smaller the value of X. When the detected value of the gas sensor 106 is greater than C + X%, by controlling the rotation of the first motor 210 and energizing the second blower 232 to operate, the permeability of the small holes on the surface of the perforated circular plate 209 is gradually increased. Then, the internal air flow of the separation chamber 205 passes through the return air pipe 208 from the perforated circular plate 209 for reflux until the detected value of the gas sensor 106 is less than C + X%. When the detected value of the gas sensor 106 is less than C + X%, the operation of the first motor 210 can be controlled to gradually reduce the permeability of the small holes on the surface of the perforated circular plate 209.

[0062] As Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, two arc-shaped grooves 219 are formed on the surface of the adjusting block 213. The radian and arc length of the two arc-shaped grooves 219 respectively correspond to the two arc-shaped sides of the sector-shaped sealing pad 215. I-shaped blocks 220 are arranged inside the arc-shaped grooves 219. The I-shaped blocks 220 are slidably connected to the adjusting block 213 through the arc-shaped grooves 219. The I-shaped blocks 220 are fixedly connected to the sector-shaped sealing pad 215. Spring ropes 221 are arranged inside the arc-shaped grooves 219. The two ends of the spring ropes 221 are respectively fixedly connected to the adjusting block 213 and the I-shaped blocks 220.

[0063] In the embodiment of the present invention, the spring ropes 221 arranged inside the arc-shaped grooves 219 enable the sector-shaped sealing pad 215 to move correspondingly along the surface of the perforated circular plate 209 when the rotating block 214 rotates towards the adjusting block 213. When the rotating block 214 rotates away from the adjusting block 213, the spring ropes 221 keep the sector-shaped sealing pad 215 in a taut state to prevent the sector-shaped sealing pad 215 from deforming under the action of the air flow. The I-shaped blocks 220 slide inside the arc-shaped grooves 219, so that during the movement of the sector-shaped sealing pad 215, its surface always closely adheres to the perforated circular plate 209 and the adjusting block 213, preventing the freeze-dried sea cucumber peptide powder from entering the gap between the perforated circular plate 209 and the adjusting block 213 or adhering to the surface of the sector-shaped sealing pad 215, thereby affecting the sealing effect of the sector-shaped sealing pad 215 on the small holes on the surface of the perforated circular plate 209.

[0064] As Figure 2 and Figure 4As shown, a material passing groove 226 is provided at a position near the bottom on the surface of the separation chamber 205. The collection box 222 is fixedly connected to the surface of the separation chamber 205. The material passing groove 226 is located inside the collection box 222. A sealing door 223 is hinged to the surface of the collection box 222. A second motor 225 is installed inside the collection box 222. The end of the output shaft of the second motor 225 is fixedly connected to a cross-shaped scraper 224. The upper surface and the bottom surface of the cross-shaped scraper 224 are in contact with the inner wall of the collection box 222.

[0065] In the embodiment of the present invention, the sea cucumber peptide freeze-dried powder accumulated at the bottom of the separation chamber 205 enters the inside of the collection box 222 from the material passing groove 226, making the two plates of the cross-shaped scraper 224 in contact with the vertical surfaces of the inner wall of the collection box 222, so that the inside of the collection box 222 is divided into a region communicating with the inside of the material passing groove 226 and a region not communicating with the material passing groove 226. Control the operation of the second motor 225 to drive the cross-shaped scraper 224 to rotate 60 degrees each time and then stop for a certain period of time. In this way, when the second motor 225 does not rotate, the sealing door 223 can be opened from the surface of the collection box 222, and the sea cucumber peptide freeze-dried powder in the region not communicating with the inside of the material passing groove 226 can be taken out from the inside of the collection box 222 to reduce the probability of the sea cucumber peptide freeze-dried powder in this part being remixed with water vapor under the influence of air flow.

[0066] As Figure 3 As shown, a fixed cylinder 227 is fixedly connected to the surface of the separation chamber 205. An electric push rod 228 is installed inside the fixed cylinder 227. A compression spring 230 is arranged inside the fixed cylinder 227. The two ends of the compression spring 230 are respectively fixedly connected to a connecting piece 229 and a friction piece 231. The connecting piece 229 and the friction piece 231 are both slidably connected to the fixed cylinder 227. The friction piece 231 is always in contact with the fixed shaft 206. The output shaft of the electric push rod 228 is fixedly connected to the connecting piece 229.

[0067] In the embodiment of the present invention, by controlling the extension length of the output shaft of the electric push rod 228, the deformation degree of the compression spring 230 between the connecting piece 229 and the friction piece 231 is controlled, and then the extrusion force of the friction piece 231 on the fixed shaft 206 is controlled, so that the filter plate 207 maintains a certain rotational speed range under the influence of air flow, preventing the rotational speed of the filter plate 207 around the central axis of the fixed shaft 206 from being too fast, and preventing more sea cucumber peptide freeze-dried powder from being discharged from the air outlet of the separation chamber 205, thereby affecting the separation efficiency of the sea cucumber peptide freeze-dried powder.

[0068] As Figure 10 As shown, support bars 234 are evenly embedded inside the sector-shaped sealing pad 215, and the central axes of the support bars 234 intersect with the rotation axis of the sector-shaped sealing pad 215.

[0069] In the embodiment of the present invention, the provision of the support bar 234 makes it difficult for the sector-shaped sealing pad 215 to deform under the action of the air flow, ensuring the sealing effect of the sector-shaped sealing pad 215 on the small holes on the surface of the perforated circular plate 209.

[0070] As Figure 7 and Figure 9 shown, a restraint groove 216 is formed on the surface of the rotating block 214, a T-shaped slider 217 is arranged inside the restraint groove 216, the T-shaped slider 217 is slidably connected to the rotating block 214, a U-shaped pressure rod 218 is arranged between the rotating block 214 and the adjusting block 213, and the U-shaped pressure rod 218 is rotatably connected to the rotating block 214 and the adjusting block 213 through two bearing seats. The surface of the U-shaped pressure rod 218 is always in contact with the part of the sector-shaped sealing pad 215 located on the surface of the perforated circular plate 209.

[0071] In the embodiment of the present invention, when the rotating block 214 rotates, the U-shaped pressure rod 218 is always in contact with the sector-shaped sealing pad 215. By sliding the T-shaped slider 217 inside the restraint groove 216, the rotation of the U-shaped pressure rod 218 is completed. Through the pressing of the U-shaped pressure rod 218, the sealing effect of the sector-shaped sealing pad 215 on the small holes on the surface of the perforated circular plate 209 is further ensured.

[0072] A low-temperature drying method for preparing sea cucumber peptides includes the following steps:

[0073] Step 1: Insert the feed pipe 203 into the container of purified liquid-phase sea cucumber peptides, start the centrifugal sprayer 201, and use the cold air flow blown into the atomization chamber 105 to perform low-temperature drying on the atomized liquid-phase sea cucumber peptides;

[0074] Step 2: The air flow introduced into the atomization chamber 105 carries the sublimated water vapor and the freeze-dried sea cucumber peptide powder through the U-shaped elbow pipe into the separation chamber 205. A part of the freeze-dried sea cucumber peptide powder impacts the inner wall of the separation chamber 205 under the action of centrifugal force and gravity and thus accumulates towards the bottom of the separation chamber 205. A part of the freeze-dried sea cucumber peptide powder is intercepted by the filter plate 207 and accumulates towards the bottom of the separation chamber 205 under the action of gravity. The water vapor is discharged from the device through the air outlet of the separation chamber 205;

[0075] Step 3: When the content of the freeze-dried sea cucumber peptide powder in the air flow at the gas sensor 106 exceeds the set value, start the second blower 232 and the first motor 210. The operation of the first motor 210 causes the rotating block 214 to rotate around the adjusting block 213, and drives the sector-shaped sealing pad 215 to move on the surface of the perforated circular plate 209 to change the permeability of the small holes on the surface of the perforated circular plate 209. The operation of the second blower 232 causes the air flow to pass through the small holes on the surface of the perforated circular plate 209 through the return pipe 208 and return to the inside of the separation chamber 205 near the air inlet of the separation chamber 205, increasing the separation efficiency of the freeze-dried sea cucumber peptide powder in the return air flow;

[0076] Step 4: Regularly take out the freeze-dried sea cucumber peptide powder from the interior of the collection box 222 to reduce the probability of this part of the freeze-dried sea cucumber peptide powder remixing with water vapor.

[0077] It should be noted that: the air outlet of the first fan 102 is connected to the air inlet of the filter dryer 103 through a pipeline, the air outlet of the filter dryer 103 is connected to the air inlet of the refrigeration unit 104 through a pipeline, the air outlet of the refrigeration unit 104 is connected to the interior of the air guide pipe 204. The working principles and usage processes of the first fan 102, the filter dryer 103, the refrigeration unit 104, the atomization chamber 105, the gas sensor 106 and the vibrator 107 are well-known in the prior art and will not be described in detail here;

[0078] In this application, the connection method of the pipeline is to fix the pipeline in the reserved groove opened on the surface of the component, or the pipeline penetrates through the reserved groove opened on the surface of the component and extends to the inside or outside of the component, or the pipeline is connected to the corresponding component by setting screw threads and corresponding screw grooves. This is well-known in the prior art and will not be described in detail;

[0079] The feeding pipe 203 can be inserted into the container containing the liquid-phase sea cucumber peptide to supply materials to the centrifugal sprayer 201;

[0080] The separation chamber 205 is in the shape of a hollow cylinder, and pipelines are respectively fixed in the openings symmetrically arranged on its surface. The pipeline opening on the left is the air inlet, and the other pipeline opening is the air outlet, facilitating the movement of gas along the curved inner wall of the separation chamber 205;

[0081] The adjusting block 213 is composed of a rectangular part and an arc part. A rectangular through groove is opened on the surface of the rectangular part to facilitate the threading of the fan-shaped sealing pad 215. The arc part is used for the sliding of the I-shaped block 220. Among them, the part of the rectangular part below the rectangular through groove is fixedly connected to the perforated circular plate 209, and the part of the rectangular part above the rectangular through groove is not in contact with the perforated circular plate 209, so that the rotating block 214 drives the fan-shaped sealing pad 215 to slide on the surface of the perforated circular plate 209. At the same time, the part of the rectangular part above the rectangular through groove will make the fan-shaped sealing pad 215 closely fit with the perforated circular plate 209 to ensure a good sealing effect of the fan-shaped sealing pad 215 on the perforated circular plate 209;

[0082] The support bar 234 and the sector-shaped sealing pad 215 are both made of flexible materials. The texture of the support bar 234 is stiffer than that of the sector-shaped sealing pad 215. So that as the rotating block 214 rotates, the sector-shaped sealing pad 215 covers along the surface of the perforated circular plate 209. At the same time, the stiffer property of the support bar 234 than the sector-shaped sealing pad 215 enables the whole sector-shaped sealing pad 215 to have a strong resistance to the airflow passing through the perforated circular plate 209, making the part of the sector-shaped sealing pad 215 attached to the surface of the perforated circular plate 209 not easily blown by the airflow;

[0083] The spring ropes 221 inside the arc-shaped groove 219 are always in a stretched state, and the lengths of the two spring ropes 221 are different. So that when the sector-shaped sealing pad 215 moves following the rotating block 214, the elastic potential energy of the two spring ropes 221 enables the I-shaped block 220 to drive the sector-shaped sealing pad 215 to always have a tendency to move away from the adjusting block 213, thus facilitating the adjusting block 213 to closely adhere to the surface of the adjusting block 213;

[0084] The shape of the I-shaped block 220 is I-shaped, which is convenient for its fixation with the sector-shaped sealing pad 215 and also convenient for its sliding along the extending direction of the arc-shaped groove 219;

[0085] The installation and use of the inductor inside the separation chamber 205 and the external alarm device are well-known in the prior art and will not be elaborated in detail here;

[0086] The installation position of the gas sensor 106 is set above the material passing groove 226 to reduce the influence of the aggregated freeze-dried sea cucumber peptide powder on the detection of the gas sensor 106;

[0087] The surfaces of the perforated circular plate 209 and the flow equalizing plate 202 are both evenly provided with small holes, facilitating the airflow to pass through the small holes through the perforated circular plate 209 and the flow equalizing plate 202. Among them, the flow equalizing plate 202 enables the airflow to blow more evenly towards the atomized liquid-phase sea cucumber peptide after passing through the flow equalizing plate 202.

[0088] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A low-temperature drying device for preparing sea cucumber peptides, comprising a fixed frame (101), on the surface of which a first fan (102), a filter dryer (103), a refrigeration unit (104), and an atomization chamber (105) are sequentially installed from left to right, and a gas sensor (106) and a vibrator (107) are arranged on the right side of the fixed frame (101), characterized in that: include: A centrifugal sprayer (201) is arranged inside the atomization chamber (105) for atomizing the purified liquid-phase sea cucumber peptide, so that the dry cold air blown into the atomization chamber (105) from the refrigeration unit (104) dries the liquid-phase sea cucumber peptide; A separation chamber (205) is provided on the right side of the atomization chamber (105) for separating the sea cucumber peptide freeze-dried powder from the airflow blown from the atomization chamber (105) into the separation chamber (205); A plurality of filter plates (207) are arranged in a circular array inside the separation chamber (205) to improve the filtering efficiency of the separation chamber (205) for the sea cucumber peptide freeze-dried powder; The surface of the separation chamber (205) is provided with an air return pipe (208), and both ends of the air return pipe (208) are respectively located in first circular grooves symmetrically opened on the surface of the separation chamber (205), and the air return pipe (208) is used to further improve the filtering efficiency of the filter plate (207) for the sea cucumber peptide freeze-dried powder; A circular plate with holes (209) is arranged inside the return air pipe (208), and a plurality of fan-shaped sealing pads (215) are arranged in a ring array on the surface of the circular plate with holes (209), and the small holes on the surface of the circular plate with holes (209) are sealed by the fan-shaped sealing pads (215) to control the reflux ratio of the airflow inside the separation chamber (205); A collecting box (222) is provided at the bottom of the separation chamber (205) so that the separated sea cucumber peptide freeze-dried powder can be taken out from the inside of the device in a timely manner, thereby reducing the probability of the sea cucumber peptide freeze-dried powder mixing with water vapor again.

2. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 1, characterized in that: A flow equalizing plate (202) is fixedly connected inside the atomizing chamber (105), a centrifugal sprayer (201) is installed in a mounting groove provided on the surface of the flow equalizing plate (202), an air guide pipe (204) is fixedly connected in a second circular groove provided on the surface of the atomizing chamber (105), the air guide pipe (204) is connected to an air outlet of the refrigeration unit (104), a feed pipe (203) is fixedly connected in a feed inlet of the centrifugal sprayer (201), the feed pipe (203) passes through the surface of the atomizing chamber (105) and extends to the outside of the atomizing chamber (105), the feed pipe (203) is fixedly connected to the atomizing chamber (105), the atomizing chamber (105) is connected to an air inlet of the separation chamber (205) via a U-shaped pipe, and the vibrator (107) is installed on the surface of the separation chamber (205).

3. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 2, characterized in that: A fixed shaft (206) is arranged inside the separation chamber (205); the fixed shaft (206) is rotatably connected to two third circular grooves provided on the surface of the separation chamber (205) via two first bearings; the filter plates (207) are fixedly connected to the surface of the fixed shaft (206) in an annular array; the filter plates (207) are in contact with the planar inner wall of the separation chamber (205), and the filter plates (207) are not in contact with the curved inner wall of the separation chamber (205).

4. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 3, characterized in that: A circular plate with a hole (209) is fixedly connected to the right pipe opening of the return air pipe (208); the gas sensor (106) is installed on the surface of the separation chamber (205) near the circular plate with a hole (209); a surface of the circular plate with a hole (209) away from the separation chamber (205) is fixedly connected to a plurality of adjustment blocks (213) in a circular array; a rotating block (214) is hingedly connected to the surface of the adjustment block (213); the fan-shaped sealing pad (215) is fixedly connected to the rotating block (214), and the fan-shaped sealing pad (215) is penetrated on the surface of the adjustment block (213). A first motor (210) is installed on the surface of the perforated circular plate (209) in the rectangular through-groove, a driving gear (211) is fixedly connected to the end of the output shaft of the first motor (210), a driven gear (212) is fixedly connected to the surface of the rotating block (214), a central axis of the driven gear (212) coincides with a rotating axis of the rotating block (214) rotating around the adjusting block (213), the driven gears (212) are meshedly connected to the driving gear (211), and a second fan (232) is installed in the left pipe opening of the return air pipe (208).

5. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 4, characterized in that: The surface of the adjustment block (213) is provided with two arc-shaped grooves (219), the arc angles and arc lengths of the two arc-shaped grooves (219) respectively correspond to the two arc-shaped edges of the fan-shaped sealing pad (215), an I-shaped block (220) is arranged inside the arc-shaped grooves (219), the I-shaped block (220) is slidably connected to the adjustment block (213) through the arc-shaped grooves (219), the I-shaped block (220) is fixedly connected to the fan-shaped sealing pad (215), and a spring rope (221) is arranged inside the arc-shaped grooves (219), and two ends of the spring rope (221) are respectively fixedly connected to the adjustment block (213) and the I-shaped block (220).

6. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 5, characterized in that: A material passing trough (226) is provided on the surface of the separation chamber (205) near the bottom, the collection box (222) is fixedly connected to the surface of the separation chamber (205), the material passing trough (226) is located inside the collection box (222), a sealing door (223) is hingedly connected to the surface of the collection box (222), a second motor (225) is installed inside the collection box (222), a cross-shaped scraper (224) is fixedly connected to the end of the output shaft of the second motor (225), and the upper surface and the bottom surface of the cross-shaped scraper (224) are in contact with the inner wall of the collection box (222).

7. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 6, characterized in that: A fixed cylinder (227) is fixedly connected to the surface of the separation chamber (205), an electric push rod (228) is installed inside the fixed cylinder (227), a compression spring (230) is arranged inside the fixed cylinder (227), and a connecting plate (229) and a friction plate (231) are fixedly connected to both ends of the compression spring (230), the connecting plate (229) and the friction plate (231) are both slidably connected to the fixed cylinder (227), the friction plate (231) is always in conflict with the fixed shaft (206), and the output shaft of the electric push rod (228) is fixedly connected to the connecting plate (229).

8. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 7, characterized in that: Support bars (234) are evenly embedded in the interior of the sector-shaped sealing pad (215), and the central axes of the support bars (234) intersect with the rotation axis of the sector-shaped sealing pad (215).

9. The low-temperature drying equipment for preparing sea cucumber peptide according to claim 8, characterized in that: A restraining groove (216) is provided on the surface of the rotating block (214), a T-shaped slider (217) is provided inside the restraining groove (216), the T-shaped slider (217) is slidably connected to the rotating block (214), a U-shaped pressure rod (218) is provided between the rotating block (214) and the adjusting block (213), the U-shaped pressure rod (218) is rotatably connected to the rotating block (214) and the adjusting block (213) via two bearing seats, and the surface of the U-shaped pressure rod (218) is always in contact with the part of the sector-shaped sealing pad (215) located on the surface of the perforated circular plate (209).

10. A low-temperature drying method for preparing sea cucumber peptides, applied to the low-temperature drying equipment for preparing sea cucumber peptides as claimed in claim 9, characterized in that: The steps include: Step 1, inserting the feed pipe (203) into the purified liquid-phase sea cucumber peptide container, starting the centrifugal sprayer (201), and allowing the cold air flow blown into the atomization chamber (105) to perform low-temperature drying on the atomized liquid-phase sea cucumber peptide; Step 2, the airflow entering the atomization chamber (105) carries sublimated water vapor and sea cucumber peptide freeze-dried powder through a U-shaped tube and enters the separation chamber (205). A portion of the sea cucumber peptide freeze-dried powder hits the inner wall of the separation chamber (205) under the action of centrifugal force and gravity, thereby gathering at the bottom of the separation chamber (205). A portion of the sea cucumber peptide freeze-dried powder is intercepted by the filter plate (207) and gathers at the bottom of the separation chamber (205) under the action of gravity. The water vapor is discharged from the device through the air outlet of the separation chamber (205); Step three, when the content of sea cucumber peptide freeze-dried powder in the airflow at the gas sensor (106) exceeds the set value, the second fan (232) and the first motor (210) are started. The operation of the first motor (210) causes the rotating block (214) to rotate around the adjusting block (213), and drives the fan-shaped sealing pad (215) to move on the surface of the perforated circular plate (209) to change the permeability of the small holes on the surface of the perforated circular plate (209). The operation of the second fan (232) causes the airflow to pass through the small holes on the surface of the perforated circular plate (209) through the return air pipe (208) back to the inside of the separation chamber (205) near the air inlet of the separation chamber (205), thereby increasing the separation efficiency of the sea cucumber peptide freeze-dried powder in the reflux airflow; Step 4: regularly taking out the sea cucumber peptide freeze-dried powder from the inside of the collection box (222) to reduce the probability of the sea cucumber peptide freeze-dried powder being re-mixed with water vapor.

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